1 // Copyright 2016 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "core/fpdfapi/render/cpdf_renderstatus.h"
8
9 #include <algorithm>
10 #include <memory>
11 #include <utility>
12 #include <vector>
13
14 #include "core/fpdfapi/font/cpdf_font.h"
15 #include "core/fpdfapi/font/cpdf_type3char.h"
16 #include "core/fpdfapi/font/cpdf_type3font.h"
17 #include "core/fpdfapi/page/cpdf_docpagedata.h"
18 #include "core/fpdfapi/page/cpdf_form.h"
19 #include "core/fpdfapi/page/cpdf_formobject.h"
20 #include "core/fpdfapi/page/cpdf_graphicstates.h"
21 #include "core/fpdfapi/page/cpdf_image.h"
22 #include "core/fpdfapi/page/cpdf_imageobject.h"
23 #include "core/fpdfapi/page/cpdf_meshstream.h"
24 #include "core/fpdfapi/page/cpdf_page.h"
25 #include "core/fpdfapi/page/cpdf_pageobject.h"
26 #include "core/fpdfapi/page/cpdf_pathobject.h"
27 #include "core/fpdfapi/page/cpdf_shadingobject.h"
28 #include "core/fpdfapi/page/cpdf_shadingpattern.h"
29 #include "core/fpdfapi/page/cpdf_textobject.h"
30 #include "core/fpdfapi/page/cpdf_tilingpattern.h"
31 #include "core/fpdfapi/page/pageint.h"
32 #include "core/fpdfapi/parser/cpdf_array.h"
33 #include "core/fpdfapi/parser/cpdf_dictionary.h"
34 #include "core/fpdfapi/parser/cpdf_document.h"
35 #include "core/fpdfapi/render/cpdf_charposlist.h"
36 #include "core/fpdfapi/render/cpdf_devicebuffer.h"
37 #include "core/fpdfapi/render/cpdf_dibsource.h"
38 #include "core/fpdfapi/render/cpdf_docrenderdata.h"
39 #include "core/fpdfapi/render/cpdf_imagerenderer.h"
40 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
41 #include "core/fpdfapi/render/cpdf_rendercontext.h"
42 #include "core/fpdfapi/render/cpdf_renderoptions.h"
43 #include "core/fpdfapi/render/cpdf_scaledrenderbuffer.h"
44 #include "core/fpdfapi/render/cpdf_textrenderer.h"
45 #include "core/fpdfapi/render/cpdf_transferfunc.h"
46 #include "core/fpdfapi/render/cpdf_type3cache.h"
47 #include "core/fpdfdoc/cpdf_occontext.h"
48 #include "core/fxcodec/fx_codec.h"
49 #include "core/fxcrt/cfx_maybe_owned.h"
50 #include "core/fxcrt/fx_safe_types.h"
51 #include "core/fxge/cfx_fxgedevice.h"
52 #include "core/fxge/cfx_graphstatedata.h"
53 #include "core/fxge/cfx_pathdata.h"
54 #include "core/fxge/cfx_renderdevice.h"
55 #include "core/fxge/ifx_renderdevicedriver.h"
56 #include "third_party/base/numerics/safe_math.h"
57 #include "third_party/base/ptr_util.h"
58 #include "third_party/base/stl_util.h"
59
60 #ifdef _SKIA_SUPPORT_
61 #include "core/fxge/skia/fx_skia_device.h"
62 #endif
63
64 #define SHADING_STEPS 256
65
66 namespace {
67
ReleaseCachedType3(CPDF_Type3Font * pFont)68 void ReleaseCachedType3(CPDF_Type3Font* pFont) {
69 if (!pFont->m_pDocument)
70 return;
71
72 pFont->m_pDocument->GetRenderData()->ReleaseCachedType3(pFont);
73 pFont->m_pDocument->GetPageData()->ReleaseFont(pFont->GetFontDict());
74 }
75
76 class CPDF_RefType3Cache {
77 public:
CPDF_RefType3Cache(CPDF_Type3Font * pType3Font)78 explicit CPDF_RefType3Cache(CPDF_Type3Font* pType3Font)
79 : m_dwCount(0), m_pType3Font(pType3Font) {}
80
~CPDF_RefType3Cache()81 ~CPDF_RefType3Cache() {
82 while (m_dwCount--)
83 ReleaseCachedType3(m_pType3Font);
84 }
85
86 uint32_t m_dwCount;
87 CPDF_Type3Font* const m_pType3Font;
88 };
89
CountOutputs(const std::vector<std::unique_ptr<CPDF_Function>> & funcs)90 uint32_t CountOutputs(
91 const std::vector<std::unique_ptr<CPDF_Function>>& funcs) {
92 uint32_t total = 0;
93 for (const auto& func : funcs) {
94 if (func)
95 total += func->CountOutputs();
96 }
97 return total;
98 }
99
DrawAxialShading(CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Dictionary * pDict,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int alpha)100 void DrawAxialShading(CFX_DIBitmap* pBitmap,
101 CFX_Matrix* pObject2Bitmap,
102 CPDF_Dictionary* pDict,
103 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
104 CPDF_ColorSpace* pCS,
105 int alpha) {
106 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
107 CPDF_Array* pCoords = pDict->GetArrayFor("Coords");
108 if (!pCoords)
109 return;
110
111 FX_FLOAT start_x = pCoords->GetNumberAt(0);
112 FX_FLOAT start_y = pCoords->GetNumberAt(1);
113 FX_FLOAT end_x = pCoords->GetNumberAt(2);
114 FX_FLOAT end_y = pCoords->GetNumberAt(3);
115 FX_FLOAT t_min = 0;
116 FX_FLOAT t_max = 1.0f;
117 CPDF_Array* pArray = pDict->GetArrayFor("Domain");
118 if (pArray) {
119 t_min = pArray->GetNumberAt(0);
120 t_max = pArray->GetNumberAt(1);
121 }
122 bool bStartExtend = false;
123 bool bEndExtend = false;
124 pArray = pDict->GetArrayFor("Extend");
125 if (pArray) {
126 bStartExtend = !!pArray->GetIntegerAt(0);
127 bEndExtend = !!pArray->GetIntegerAt(1);
128 }
129 int width = pBitmap->GetWidth();
130 int height = pBitmap->GetHeight();
131 FX_FLOAT x_span = end_x - start_x;
132 FX_FLOAT y_span = end_y - start_y;
133 FX_FLOAT axis_len_square = (x_span * x_span) + (y_span * y_span);
134 CFX_Matrix matrix;
135 matrix.SetReverse(*pObject2Bitmap);
136 uint32_t total_results =
137 std::max(CountOutputs(funcs), pCS->CountComponents());
138 CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
139 FX_FLOAT* pResults = result_array;
140 FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
141 uint32_t rgb_array[SHADING_STEPS];
142 for (int i = 0; i < SHADING_STEPS; i++) {
143 FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
144 int offset = 0;
145 for (const auto& func : funcs) {
146 if (func) {
147 int nresults = 0;
148 if (func->Call(&input, 1, pResults + offset, nresults))
149 offset += nresults;
150 }
151 }
152 FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
153 pCS->GetRGB(pResults, R, G, B);
154 rgb_array[i] =
155 FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
156 FXSYS_round(G * 255), FXSYS_round(B * 255)));
157 }
158 int pitch = pBitmap->GetPitch();
159 for (int row = 0; row < height; row++) {
160 uint32_t* dib_buf = (uint32_t*)(pBitmap->GetBuffer() + row * pitch);
161 for (int column = 0; column < width; column++) {
162 CFX_PointF pos = matrix.Transform(CFX_PointF(
163 static_cast<FX_FLOAT>(column), static_cast<FX_FLOAT>(row)));
164 FX_FLOAT scale =
165 (((pos.x - start_x) * x_span) + ((pos.y - start_y) * y_span)) /
166 axis_len_square;
167 int index = (int32_t)(scale * (SHADING_STEPS - 1));
168 if (index < 0) {
169 if (!bStartExtend)
170 continue;
171
172 index = 0;
173 } else if (index >= SHADING_STEPS) {
174 if (!bEndExtend)
175 continue;
176
177 index = SHADING_STEPS - 1;
178 }
179 dib_buf[column] = rgb_array[index];
180 }
181 }
182 }
183
DrawRadialShading(CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Dictionary * pDict,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int alpha)184 void DrawRadialShading(CFX_DIBitmap* pBitmap,
185 CFX_Matrix* pObject2Bitmap,
186 CPDF_Dictionary* pDict,
187 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
188 CPDF_ColorSpace* pCS,
189 int alpha) {
190 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
191 CPDF_Array* pCoords = pDict->GetArrayFor("Coords");
192 if (!pCoords)
193 return;
194
195 FX_FLOAT start_x = pCoords->GetNumberAt(0);
196 FX_FLOAT start_y = pCoords->GetNumberAt(1);
197 FX_FLOAT start_r = pCoords->GetNumberAt(2);
198 FX_FLOAT end_x = pCoords->GetNumberAt(3);
199 FX_FLOAT end_y = pCoords->GetNumberAt(4);
200 FX_FLOAT end_r = pCoords->GetNumberAt(5);
201 CFX_Matrix matrix;
202 matrix.SetReverse(*pObject2Bitmap);
203 FX_FLOAT t_min = 0;
204 FX_FLOAT t_max = 1.0f;
205 CPDF_Array* pArray = pDict->GetArrayFor("Domain");
206 if (pArray) {
207 t_min = pArray->GetNumberAt(0);
208 t_max = pArray->GetNumberAt(1);
209 }
210 bool bStartExtend = false;
211 bool bEndExtend = false;
212 pArray = pDict->GetArrayFor("Extend");
213 if (pArray) {
214 bStartExtend = !!pArray->GetIntegerAt(0);
215 bEndExtend = !!pArray->GetIntegerAt(1);
216 }
217 uint32_t total_results =
218 std::max(CountOutputs(funcs), pCS->CountComponents());
219 CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
220 FX_FLOAT* pResults = result_array;
221 FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
222 uint32_t rgb_array[SHADING_STEPS];
223 for (int i = 0; i < SHADING_STEPS; i++) {
224 FX_FLOAT input = (t_max - t_min) * i / SHADING_STEPS + t_min;
225 int offset = 0;
226 for (const auto& func : funcs) {
227 if (func) {
228 int nresults;
229 if (func->Call(&input, 1, pResults + offset, nresults))
230 offset += nresults;
231 }
232 }
233 FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
234 pCS->GetRGB(pResults, R, G, B);
235 rgb_array[i] =
236 FXARGB_TODIB(FXARGB_MAKE(alpha, FXSYS_round(R * 255),
237 FXSYS_round(G * 255), FXSYS_round(B * 255)));
238 }
239 FX_FLOAT a = ((start_x - end_x) * (start_x - end_x)) +
240 ((start_y - end_y) * (start_y - end_y)) -
241 ((start_r - end_r) * (start_r - end_r));
242 int width = pBitmap->GetWidth();
243 int height = pBitmap->GetHeight();
244 int pitch = pBitmap->GetPitch();
245 bool bDecreasing = false;
246 if (start_r > end_r) {
247 int length = (int)FXSYS_sqrt((((start_x - end_x) * (start_x - end_x)) +
248 ((start_y - end_y) * (start_y - end_y))));
249 if (length < start_r - end_r) {
250 bDecreasing = true;
251 }
252 }
253 for (int row = 0; row < height; row++) {
254 uint32_t* dib_buf = (uint32_t*)(pBitmap->GetBuffer() + row * pitch);
255 for (int column = 0; column < width; column++) {
256 CFX_PointF pos = matrix.Transform(CFX_PointF(
257 static_cast<FX_FLOAT>(column), static_cast<FX_FLOAT>(row)));
258 FX_FLOAT b = -2 * (((pos.x - start_x) * (end_x - start_x)) +
259 ((pos.y - start_y) * (end_y - start_y)) +
260 (start_r * (end_r - start_r)));
261 FX_FLOAT c = ((pos.x - start_x) * (pos.x - start_x)) +
262 ((pos.y - start_y) * (pos.y - start_y)) -
263 (start_r * start_r);
264 FX_FLOAT s;
265 if (a == 0) {
266 s = -c / b;
267 } else {
268 FX_FLOAT b2_4ac = (b * b) - 4 * (a * c);
269 if (b2_4ac < 0) {
270 continue;
271 }
272 FX_FLOAT root = FXSYS_sqrt(b2_4ac);
273 FX_FLOAT s1, s2;
274 if (a > 0) {
275 s1 = (-b - root) / (2 * a);
276 s2 = (-b + root) / (2 * a);
277 } else {
278 s2 = (-b - root) / (2 * a);
279 s1 = (-b + root) / (2 * a);
280 }
281 if (bDecreasing) {
282 if (s1 >= 0 || bStartExtend) {
283 s = s1;
284 } else {
285 s = s2;
286 }
287 } else {
288 if (s2 <= 1.0f || bEndExtend) {
289 s = s2;
290 } else {
291 s = s1;
292 }
293 }
294 if ((start_r + s * (end_r - start_r)) < 0) {
295 continue;
296 }
297 }
298 int index = (int32_t)(s * (SHADING_STEPS - 1));
299 if (index < 0) {
300 if (!bStartExtend) {
301 continue;
302 }
303 index = 0;
304 }
305 if (index >= SHADING_STEPS) {
306 if (!bEndExtend) {
307 continue;
308 }
309 index = SHADING_STEPS - 1;
310 }
311 dib_buf[column] = rgb_array[index];
312 }
313 }
314 }
315
DrawFuncShading(CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Dictionary * pDict,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int alpha)316 void DrawFuncShading(CFX_DIBitmap* pBitmap,
317 CFX_Matrix* pObject2Bitmap,
318 CPDF_Dictionary* pDict,
319 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
320 CPDF_ColorSpace* pCS,
321 int alpha) {
322 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
323 CPDF_Array* pDomain = pDict->GetArrayFor("Domain");
324 FX_FLOAT xmin = 0, ymin = 0, xmax = 1.0f, ymax = 1.0f;
325 if (pDomain) {
326 xmin = pDomain->GetNumberAt(0);
327 xmax = pDomain->GetNumberAt(1);
328 ymin = pDomain->GetNumberAt(2);
329 ymax = pDomain->GetNumberAt(3);
330 }
331 CFX_Matrix mtDomain2Target = pDict->GetMatrixFor("Matrix");
332 CFX_Matrix matrix;
333 matrix.SetReverse(*pObject2Bitmap);
334
335 CFX_Matrix reverse_matrix;
336 reverse_matrix.SetReverse(mtDomain2Target);
337 matrix.Concat(reverse_matrix);
338 int width = pBitmap->GetWidth();
339 int height = pBitmap->GetHeight();
340 int pitch = pBitmap->GetPitch();
341 uint32_t total_results =
342 std::max(CountOutputs(funcs), pCS->CountComponents());
343 CFX_FixedBufGrow<FX_FLOAT, 16> result_array(total_results);
344 FX_FLOAT* pResults = result_array;
345 FXSYS_memset(pResults, 0, total_results * sizeof(FX_FLOAT));
346 for (int row = 0; row < height; row++) {
347 uint32_t* dib_buf = (uint32_t*)(pBitmap->GetBuffer() + row * pitch);
348 for (int column = 0; column < width; column++) {
349 CFX_PointF pos = matrix.Transform(CFX_PointF(
350 static_cast<FX_FLOAT>(column), static_cast<FX_FLOAT>(row)));
351 if (pos.x < xmin || pos.x > xmax || pos.y < ymin || pos.y > ymax)
352 continue;
353
354 FX_FLOAT input[] = {pos.x, pos.y};
355 int offset = 0;
356 for (const auto& func : funcs) {
357 if (func) {
358 int nresults;
359 if (func->Call(input, 2, pResults + offset, nresults))
360 offset += nresults;
361 }
362 }
363
364 FX_FLOAT R = 0.0f;
365 FX_FLOAT G = 0.0f;
366 FX_FLOAT B = 0.0f;
367 pCS->GetRGB(pResults, R, G, B);
368 dib_buf[column] = FXARGB_TODIB(FXARGB_MAKE(
369 alpha, (int32_t)(R * 255), (int32_t)(G * 255), (int32_t)(B * 255)));
370 }
371 }
372 }
373
GetScanlineIntersect(int y,const CFX_PointF & first,const CFX_PointF & second,FX_FLOAT * x)374 bool GetScanlineIntersect(int y,
375 const CFX_PointF& first,
376 const CFX_PointF& second,
377 FX_FLOAT* x) {
378 if (first.y == second.y)
379 return false;
380
381 if (first.y < second.y) {
382 if (y < first.y || y > second.y)
383 return false;
384 } else if (y < second.y || y > first.y) {
385 return false;
386 }
387 *x = first.x + ((second.x - first.x) * (y - first.y) / (second.y - first.y));
388 return true;
389 }
390
DrawGouraud(CFX_DIBitmap * pBitmap,int alpha,CPDF_MeshVertex triangle[3])391 void DrawGouraud(CFX_DIBitmap* pBitmap,
392 int alpha,
393 CPDF_MeshVertex triangle[3]) {
394 FX_FLOAT min_y = triangle[0].position.y;
395 FX_FLOAT max_y = triangle[0].position.y;
396 for (int i = 1; i < 3; i++) {
397 min_y = std::min(min_y, triangle[i].position.y);
398 max_y = std::max(max_y, triangle[i].position.y);
399 }
400 if (min_y == max_y)
401 return;
402
403 int min_yi = std::max(static_cast<int>(FXSYS_floor(min_y)), 0);
404 int max_yi = static_cast<int>(FXSYS_ceil(max_y));
405
406 if (max_yi >= pBitmap->GetHeight())
407 max_yi = pBitmap->GetHeight() - 1;
408
409 for (int y = min_yi; y <= max_yi; y++) {
410 int nIntersects = 0;
411 FX_FLOAT inter_x[3];
412 FX_FLOAT r[3];
413 FX_FLOAT g[3];
414 FX_FLOAT b[3];
415 for (int i = 0; i < 3; i++) {
416 CPDF_MeshVertex& vertex1 = triangle[i];
417 CPDF_MeshVertex& vertex2 = triangle[(i + 1) % 3];
418 CFX_PointF& position1 = vertex1.position;
419 CFX_PointF& position2 = vertex2.position;
420 bool bIntersect =
421 GetScanlineIntersect(y, position1, position2, &inter_x[nIntersects]);
422 if (!bIntersect)
423 continue;
424
425 FX_FLOAT y_dist = (y - position1.y) / (position2.y - position1.y);
426 r[nIntersects] = vertex1.r + ((vertex2.r - vertex1.r) * y_dist);
427 g[nIntersects] = vertex1.g + ((vertex2.g - vertex1.g) * y_dist);
428 b[nIntersects] = vertex1.b + ((vertex2.b - vertex1.b) * y_dist);
429 nIntersects++;
430 }
431 if (nIntersects != 2)
432 continue;
433
434 int min_x, max_x, start_index, end_index;
435 if (inter_x[0] < inter_x[1]) {
436 min_x = (int)FXSYS_floor(inter_x[0]);
437 max_x = (int)FXSYS_ceil(inter_x[1]);
438 start_index = 0;
439 end_index = 1;
440 } else {
441 min_x = (int)FXSYS_floor(inter_x[1]);
442 max_x = (int)FXSYS_ceil(inter_x[0]);
443 start_index = 1;
444 end_index = 0;
445 }
446
447 int start_x = std::max(min_x, 0);
448 int end_x = max_x;
449 if (end_x > pBitmap->GetWidth())
450 end_x = pBitmap->GetWidth();
451
452 uint8_t* dib_buf =
453 pBitmap->GetBuffer() + y * pBitmap->GetPitch() + start_x * 4;
454 FX_FLOAT r_unit = (r[end_index] - r[start_index]) / (max_x - min_x);
455 FX_FLOAT g_unit = (g[end_index] - g[start_index]) / (max_x - min_x);
456 FX_FLOAT b_unit = (b[end_index] - b[start_index]) / (max_x - min_x);
457 FX_FLOAT R = r[start_index] + (start_x - min_x) * r_unit;
458 FX_FLOAT G = g[start_index] + (start_x - min_x) * g_unit;
459 FX_FLOAT B = b[start_index] + (start_x - min_x) * b_unit;
460 for (int x = start_x; x < end_x; x++) {
461 R += r_unit;
462 G += g_unit;
463 B += b_unit;
464 FXARGB_SETDIB(dib_buf,
465 FXARGB_MAKE(alpha, (int32_t)(R * 255), (int32_t)(G * 255),
466 (int32_t)(B * 255)));
467 dib_buf += 4;
468 }
469 }
470 }
471
DrawFreeGouraudShading(CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Stream * pShadingStream,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int alpha)472 void DrawFreeGouraudShading(
473 CFX_DIBitmap* pBitmap,
474 CFX_Matrix* pObject2Bitmap,
475 CPDF_Stream* pShadingStream,
476 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
477 CPDF_ColorSpace* pCS,
478 int alpha) {
479 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
480
481 CPDF_MeshStream stream(kFreeFormGouraudTriangleMeshShading, funcs,
482 pShadingStream, pCS);
483 if (!stream.Load())
484 return;
485
486 CPDF_MeshVertex triangle[3];
487 FXSYS_memset(triangle, 0, sizeof(triangle));
488
489 while (!stream.BitStream()->IsEOF()) {
490 CPDF_MeshVertex vertex;
491 uint32_t flag;
492 if (!stream.ReadVertex(*pObject2Bitmap, &vertex, &flag))
493 return;
494
495 if (flag == 0) {
496 triangle[0] = vertex;
497 for (int j = 1; j < 3; j++) {
498 uint32_t tflag;
499 if (!stream.ReadVertex(*pObject2Bitmap, &triangle[j], &tflag))
500 return;
501 }
502 } else {
503 if (flag == 1)
504 triangle[0] = triangle[1];
505
506 triangle[1] = triangle[2];
507 triangle[2] = vertex;
508 }
509 DrawGouraud(pBitmap, alpha, triangle);
510 }
511 }
512
DrawLatticeGouraudShading(CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Stream * pShadingStream,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int alpha)513 void DrawLatticeGouraudShading(
514 CFX_DIBitmap* pBitmap,
515 CFX_Matrix* pObject2Bitmap,
516 CPDF_Stream* pShadingStream,
517 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
518 CPDF_ColorSpace* pCS,
519 int alpha) {
520 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
521
522 int row_verts = pShadingStream->GetDict()->GetIntegerFor("VerticesPerRow");
523 if (row_verts < 2)
524 return;
525
526 CPDF_MeshStream stream(kLatticeFormGouraudTriangleMeshShading, funcs,
527 pShadingStream, pCS);
528 if (!stream.Load())
529 return;
530
531 std::unique_ptr<CPDF_MeshVertex, FxFreeDeleter> vertex(
532 FX_Alloc2D(CPDF_MeshVertex, row_verts, 2));
533 if (!stream.ReadVertexRow(*pObject2Bitmap, row_verts, vertex.get()))
534 return;
535
536 int last_index = 0;
537 while (1) {
538 CPDF_MeshVertex* last_row = vertex.get() + last_index * row_verts;
539 CPDF_MeshVertex* this_row = vertex.get() + (1 - last_index) * row_verts;
540 if (!stream.ReadVertexRow(*pObject2Bitmap, row_verts, this_row))
541 return;
542
543 CPDF_MeshVertex triangle[3];
544 for (int i = 1; i < row_verts; i++) {
545 triangle[0] = last_row[i];
546 triangle[1] = this_row[i - 1];
547 triangle[2] = last_row[i - 1];
548 DrawGouraud(pBitmap, alpha, triangle);
549 triangle[2] = this_row[i];
550 DrawGouraud(pBitmap, alpha, triangle);
551 }
552 last_index = 1 - last_index;
553 }
554 }
555
556 struct Coon_BezierCoeff {
557 float a, b, c, d;
FromPoints__anon9077da850111::Coon_BezierCoeff558 void FromPoints(float p0, float p1, float p2, float p3) {
559 a = -p0 + 3 * p1 - 3 * p2 + p3;
560 b = 3 * p0 - 6 * p1 + 3 * p2;
561 c = -3 * p0 + 3 * p1;
562 d = p0;
563 }
first_half__anon9077da850111::Coon_BezierCoeff564 Coon_BezierCoeff first_half() {
565 Coon_BezierCoeff result;
566 result.a = a / 8;
567 result.b = b / 4;
568 result.c = c / 2;
569 result.d = d;
570 return result;
571 }
second_half__anon9077da850111::Coon_BezierCoeff572 Coon_BezierCoeff second_half() {
573 Coon_BezierCoeff result;
574 result.a = a / 8;
575 result.b = 3 * a / 8 + b / 4;
576 result.c = 3 * a / 8 + b / 2 + c / 2;
577 result.d = a / 8 + b / 4 + c / 2 + d;
578 return result;
579 }
GetPoints__anon9077da850111::Coon_BezierCoeff580 void GetPoints(float p[4]) {
581 p[0] = d;
582 p[1] = c / 3 + p[0];
583 p[2] = b / 3 - p[0] + 2 * p[1];
584 p[3] = a + p[0] - 3 * p[1] + 3 * p[2];
585 }
GetPointsReverse__anon9077da850111::Coon_BezierCoeff586 void GetPointsReverse(float p[4]) {
587 p[3] = d;
588 p[2] = c / 3 + p[3];
589 p[1] = b / 3 - p[3] + 2 * p[2];
590 p[0] = a + p[3] - 3 * p[2] + 3 * p[1];
591 }
BezierInterpol__anon9077da850111::Coon_BezierCoeff592 void BezierInterpol(Coon_BezierCoeff& C1,
593 Coon_BezierCoeff& C2,
594 Coon_BezierCoeff& D1,
595 Coon_BezierCoeff& D2) {
596 a = (D1.a + D2.a) / 2;
597 b = (D1.b + D2.b) / 2;
598 c = (D1.c + D2.c) / 2 - (C1.a / 8 + C1.b / 4 + C1.c / 2) +
599 (C2.a / 8 + C2.b / 4) + (-C1.d + D2.d) / 2 - (C2.a + C2.b) / 2;
600 d = C1.a / 8 + C1.b / 4 + C1.c / 2 + C1.d;
601 }
Distance__anon9077da850111::Coon_BezierCoeff602 float Distance() {
603 float dis = a + b + c;
604 return dis < 0 ? -dis : dis;
605 }
606 };
607
608 struct Coon_Bezier {
609 Coon_BezierCoeff x, y;
FromPoints__anon9077da850111::Coon_Bezier610 void FromPoints(float x0,
611 float y0,
612 float x1,
613 float y1,
614 float x2,
615 float y2,
616 float x3,
617 float y3) {
618 x.FromPoints(x0, x1, x2, x3);
619 y.FromPoints(y0, y1, y2, y3);
620 }
621
first_half__anon9077da850111::Coon_Bezier622 Coon_Bezier first_half() {
623 Coon_Bezier result;
624 result.x = x.first_half();
625 result.y = y.first_half();
626 return result;
627 }
628
second_half__anon9077da850111::Coon_Bezier629 Coon_Bezier second_half() {
630 Coon_Bezier result;
631 result.x = x.second_half();
632 result.y = y.second_half();
633 return result;
634 }
635
BezierInterpol__anon9077da850111::Coon_Bezier636 void BezierInterpol(Coon_Bezier& C1,
637 Coon_Bezier& C2,
638 Coon_Bezier& D1,
639 Coon_Bezier& D2) {
640 x.BezierInterpol(C1.x, C2.x, D1.x, D2.x);
641 y.BezierInterpol(C1.y, C2.y, D1.y, D2.y);
642 }
643
GetPoints__anon9077da850111::Coon_Bezier644 void GetPoints(std::vector<FX_PATHPOINT>& pPoints, size_t start_idx) {
645 float p[4];
646 int i;
647 x.GetPoints(p);
648 for (i = 0; i < 4; i++)
649 pPoints[start_idx + i].m_Point.x = p[i];
650
651 y.GetPoints(p);
652 for (i = 0; i < 4; i++)
653 pPoints[start_idx + i].m_Point.y = p[i];
654 }
655
GetPointsReverse__anon9077da850111::Coon_Bezier656 void GetPointsReverse(std::vector<FX_PATHPOINT>& pPoints, size_t start_idx) {
657 float p[4];
658 int i;
659 x.GetPointsReverse(p);
660 for (i = 0; i < 4; i++)
661 pPoints[i + start_idx].m_Point.x = p[i];
662
663 y.GetPointsReverse(p);
664 for (i = 0; i < 4; i++)
665 pPoints[i + start_idx].m_Point.y = p[i];
666 }
667
Distance__anon9077da850111::Coon_Bezier668 float Distance() { return x.Distance() + y.Distance(); }
669 };
670
BiInterpolImpl(int c0,int c1,int c2,int c3,int x,int y,int x_scale,int y_scale)671 int BiInterpolImpl(int c0,
672 int c1,
673 int c2,
674 int c3,
675 int x,
676 int y,
677 int x_scale,
678 int y_scale) {
679 int x1 = c0 + (c3 - c0) * x / x_scale;
680 int x2 = c1 + (c2 - c1) * x / x_scale;
681 return x1 + (x2 - x1) * y / y_scale;
682 }
683
684 struct Coon_Color {
Coon_Color__anon9077da850111::Coon_Color685 Coon_Color() { FXSYS_memset(comp, 0, sizeof(int) * 3); }
686 int comp[3];
687
BiInterpol__anon9077da850111::Coon_Color688 void BiInterpol(Coon_Color colors[4],
689 int x,
690 int y,
691 int x_scale,
692 int y_scale) {
693 for (int i = 0; i < 3; i++) {
694 comp[i] = BiInterpolImpl(colors[0].comp[i], colors[1].comp[i],
695 colors[2].comp[i], colors[3].comp[i], x, y,
696 x_scale, y_scale);
697 }
698 }
699
Distance__anon9077da850111::Coon_Color700 int Distance(Coon_Color& o) {
701 return std::max({FXSYS_abs(comp[0] - o.comp[0]),
702 FXSYS_abs(comp[1] - o.comp[1]),
703 FXSYS_abs(comp[2] - o.comp[2])});
704 }
705 };
706
707 #define COONCOLOR_THRESHOLD 4
708 struct CPDF_PatchDrawer {
709 Coon_Color patch_colors[4];
710 int max_delta;
711 CFX_PathData path;
712 CFX_RenderDevice* pDevice;
713 int fill_mode;
714 int alpha;
Draw__anon9077da850111::CPDF_PatchDrawer715 void Draw(int x_scale,
716 int y_scale,
717 int left,
718 int bottom,
719 Coon_Bezier C1,
720 Coon_Bezier C2,
721 Coon_Bezier D1,
722 Coon_Bezier D2) {
723 bool bSmall = C1.Distance() < 2 && C2.Distance() < 2 && D1.Distance() < 2 &&
724 D2.Distance() < 2;
725 Coon_Color div_colors[4];
726 int d_bottom = 0;
727 int d_left = 0;
728 int d_top = 0;
729 int d_right = 0;
730 div_colors[0].BiInterpol(patch_colors, left, bottom, x_scale, y_scale);
731 if (!bSmall) {
732 div_colors[1].BiInterpol(patch_colors, left, bottom + 1, x_scale,
733 y_scale);
734 div_colors[2].BiInterpol(patch_colors, left + 1, bottom + 1, x_scale,
735 y_scale);
736 div_colors[3].BiInterpol(patch_colors, left + 1, bottom, x_scale,
737 y_scale);
738 d_bottom = div_colors[3].Distance(div_colors[0]);
739 d_left = div_colors[1].Distance(div_colors[0]);
740 d_top = div_colors[1].Distance(div_colors[2]);
741 d_right = div_colors[2].Distance(div_colors[3]);
742 }
743
744 if (bSmall ||
745 (d_bottom < COONCOLOR_THRESHOLD && d_left < COONCOLOR_THRESHOLD &&
746 d_top < COONCOLOR_THRESHOLD && d_right < COONCOLOR_THRESHOLD)) {
747 std::vector<FX_PATHPOINT>& pPoints = path.GetPoints();
748 C1.GetPoints(pPoints, 0);
749 D2.GetPoints(pPoints, 3);
750 C2.GetPointsReverse(pPoints, 6);
751 D1.GetPointsReverse(pPoints, 9);
752 int fillFlags = FXFILL_WINDING | FXFILL_FULLCOVER;
753 if (fill_mode & RENDER_NOPATHSMOOTH) {
754 fillFlags |= FXFILL_NOPATHSMOOTH;
755 }
756 pDevice->DrawPath(
757 &path, nullptr, nullptr,
758 FXARGB_MAKE(alpha, div_colors[0].comp[0], div_colors[0].comp[1],
759 div_colors[0].comp[2]),
760 0, fillFlags);
761 } else {
762 if (d_bottom < COONCOLOR_THRESHOLD && d_top < COONCOLOR_THRESHOLD) {
763 Coon_Bezier m1;
764 m1.BezierInterpol(D1, D2, C1, C2);
765 y_scale *= 2;
766 bottom *= 2;
767 Draw(x_scale, y_scale, left, bottom, C1, m1, D1.first_half(),
768 D2.first_half());
769 Draw(x_scale, y_scale, left, bottom + 1, m1, C2, D1.second_half(),
770 D2.second_half());
771 } else if (d_left < COONCOLOR_THRESHOLD &&
772 d_right < COONCOLOR_THRESHOLD) {
773 Coon_Bezier m2;
774 m2.BezierInterpol(C1, C2, D1, D2);
775 x_scale *= 2;
776 left *= 2;
777 Draw(x_scale, y_scale, left, bottom, C1.first_half(), C2.first_half(),
778 D1, m2);
779 Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(),
780 C2.second_half(), m2, D2);
781 } else {
782 Coon_Bezier m1, m2;
783 m1.BezierInterpol(D1, D2, C1, C2);
784 m2.BezierInterpol(C1, C2, D1, D2);
785 Coon_Bezier m1f = m1.first_half();
786 Coon_Bezier m1s = m1.second_half();
787 Coon_Bezier m2f = m2.first_half();
788 Coon_Bezier m2s = m2.second_half();
789 x_scale *= 2;
790 y_scale *= 2;
791 left *= 2;
792 bottom *= 2;
793 Draw(x_scale, y_scale, left, bottom, C1.first_half(), m1f,
794 D1.first_half(), m2f);
795 Draw(x_scale, y_scale, left, bottom + 1, m1f, C2.first_half(),
796 D1.second_half(), m2s);
797 Draw(x_scale, y_scale, left + 1, bottom, C1.second_half(), m1s, m2f,
798 D2.first_half());
799 Draw(x_scale, y_scale, left + 1, bottom + 1, m1s, C2.second_half(), m2s,
800 D2.second_half());
801 }
802 }
803 }
804 };
805
DrawCoonPatchMeshes(ShadingType type,CFX_DIBitmap * pBitmap,CFX_Matrix * pObject2Bitmap,CPDF_Stream * pShadingStream,const std::vector<std::unique_ptr<CPDF_Function>> & funcs,CPDF_ColorSpace * pCS,int fill_mode,int alpha)806 void DrawCoonPatchMeshes(
807 ShadingType type,
808 CFX_DIBitmap* pBitmap,
809 CFX_Matrix* pObject2Bitmap,
810 CPDF_Stream* pShadingStream,
811 const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
812 CPDF_ColorSpace* pCS,
813 int fill_mode,
814 int alpha) {
815 ASSERT(pBitmap->GetFormat() == FXDIB_Argb);
816 ASSERT(type == kCoonsPatchMeshShading ||
817 type == kTensorProductPatchMeshShading);
818
819 CFX_FxgeDevice device;
820 device.Attach(pBitmap, false, nullptr, false);
821 CPDF_MeshStream stream(type, funcs, pShadingStream, pCS);
822 if (!stream.Load())
823 return;
824
825 CPDF_PatchDrawer patch;
826 patch.alpha = alpha;
827 patch.pDevice = &device;
828 patch.fill_mode = fill_mode;
829
830 for (int i = 0; i < 13; i++) {
831 patch.path.AppendPoint(
832 CFX_PointF(), i == 0 ? FXPT_TYPE::MoveTo : FXPT_TYPE::BezierTo, false);
833 }
834
835 CFX_PointF coords[16];
836 int point_count = type == kTensorProductPatchMeshShading ? 16 : 12;
837 while (!stream.BitStream()->IsEOF()) {
838 if (!stream.CanReadFlag())
839 break;
840 uint32_t flag = stream.ReadFlag();
841 int iStartPoint = 0, iStartColor = 0, i = 0;
842 if (flag) {
843 iStartPoint = 4;
844 iStartColor = 2;
845 CFX_PointF tempCoords[4];
846 for (i = 0; i < 4; i++) {
847 tempCoords[i] = coords[(flag * 3 + i) % 12];
848 }
849 FXSYS_memcpy(coords, tempCoords, sizeof(tempCoords));
850 Coon_Color tempColors[2];
851 tempColors[0] = patch.patch_colors[flag];
852 tempColors[1] = patch.patch_colors[(flag + 1) % 4];
853 FXSYS_memcpy(patch.patch_colors, tempColors, sizeof(Coon_Color) * 2);
854 }
855 for (i = iStartPoint; i < point_count; i++) {
856 if (!stream.CanReadCoords())
857 break;
858 coords[i] = pObject2Bitmap->Transform(stream.ReadCoords());
859 }
860
861 for (i = iStartColor; i < 4; i++) {
862 if (!stream.CanReadColor())
863 break;
864
865 FX_FLOAT r;
866 FX_FLOAT g;
867 FX_FLOAT b;
868 std::tie(r, g, b) = stream.ReadColor();
869
870 patch.patch_colors[i].comp[0] = (int32_t)(r * 255);
871 patch.patch_colors[i].comp[1] = (int32_t)(g * 255);
872 patch.patch_colors[i].comp[2] = (int32_t)(b * 255);
873 }
874 CFX_FloatRect bbox = CFX_FloatRect::GetBBox(coords, point_count);
875 if (bbox.right <= 0 || bbox.left >= (FX_FLOAT)pBitmap->GetWidth() ||
876 bbox.top <= 0 || bbox.bottom >= (FX_FLOAT)pBitmap->GetHeight()) {
877 continue;
878 }
879 Coon_Bezier C1, C2, D1, D2;
880 C1.FromPoints(coords[0].x, coords[0].y, coords[11].x, coords[11].y,
881 coords[10].x, coords[10].y, coords[9].x, coords[9].y);
882 C2.FromPoints(coords[3].x, coords[3].y, coords[4].x, coords[4].y,
883 coords[5].x, coords[5].y, coords[6].x, coords[6].y);
884 D1.FromPoints(coords[0].x, coords[0].y, coords[1].x, coords[1].y,
885 coords[2].x, coords[2].y, coords[3].x, coords[3].y);
886 D2.FromPoints(coords[9].x, coords[9].y, coords[8].x, coords[8].y,
887 coords[7].x, coords[7].y, coords[6].x, coords[6].y);
888 patch.Draw(1, 1, 0, 0, C1, C2, D1, D2);
889 }
890 }
891
DrawPatternBitmap(CPDF_Document * pDoc,CPDF_PageRenderCache * pCache,CPDF_TilingPattern * pPattern,const CFX_Matrix * pObject2Device,int width,int height,int flags)892 std::unique_ptr<CFX_DIBitmap> DrawPatternBitmap(
893 CPDF_Document* pDoc,
894 CPDF_PageRenderCache* pCache,
895 CPDF_TilingPattern* pPattern,
896 const CFX_Matrix* pObject2Device,
897 int width,
898 int height,
899 int flags) {
900 std::unique_ptr<CFX_DIBitmap> pBitmap(new CFX_DIBitmap);
901 if (!pBitmap->Create(width, height,
902 pPattern->colored() ? FXDIB_Argb : FXDIB_8bppMask)) {
903 return nullptr;
904 }
905 CFX_FxgeDevice bitmap_device;
906 bitmap_device.Attach(pBitmap.get(), false, nullptr, false);
907 pBitmap->Clear(0);
908 CFX_FloatRect cell_bbox = pPattern->bbox();
909 pPattern->pattern_to_form()->TransformRect(cell_bbox);
910 pObject2Device->TransformRect(cell_bbox);
911 CFX_FloatRect bitmap_rect(0.0f, 0.0f, (FX_FLOAT)width, (FX_FLOAT)height);
912 CFX_Matrix mtAdjust;
913 mtAdjust.MatchRect(bitmap_rect, cell_bbox);
914
915 CFX_Matrix mtPattern2Bitmap = *pObject2Device;
916 mtPattern2Bitmap.Concat(mtAdjust);
917 CPDF_RenderOptions options;
918 if (!pPattern->colored())
919 options.m_ColorMode = RENDER_COLOR_ALPHA;
920
921 flags |= RENDER_FORCE_HALFTONE;
922 options.m_Flags = flags;
923 CPDF_RenderContext context(pDoc, pCache);
924 context.AppendLayer(pPattern->form(), &mtPattern2Bitmap);
925 context.Render(&bitmap_device, &options, nullptr);
926 #if defined _SKIA_SUPPORT_PATHS_
927 bitmap_device.Flush();
928 pBitmap->UnPreMultiply();
929 #endif
930 return pBitmap;
931 }
932
IsAvailableMatrix(const CFX_Matrix & matrix)933 bool IsAvailableMatrix(const CFX_Matrix& matrix) {
934 if (matrix.a == 0 || matrix.d == 0)
935 return matrix.b != 0 && matrix.c != 0;
936
937 if (matrix.b == 0 || matrix.c == 0)
938 return matrix.a != 0 && matrix.d != 0;
939
940 return true;
941 }
942
943 } // namespace
944
945 // static
946 int CPDF_RenderStatus::s_CurrentRecursionDepth = 0;
947
CPDF_RenderStatus()948 CPDF_RenderStatus::CPDF_RenderStatus()
949 : m_pFormResource(nullptr),
950 m_pPageResource(nullptr),
951 m_pContext(nullptr),
952 m_bStopped(false),
953 m_pDevice(nullptr),
954 m_pCurObj(nullptr),
955 m_pStopObj(nullptr),
956 m_bPrint(false),
957 m_Transparency(0),
958 m_bDropObjects(false),
959 m_bStdCS(false),
960 m_GroupFamily(0),
961 m_bLoadMask(false),
962 m_pType3Char(nullptr),
963 m_T3FillColor(0),
964 m_curBlend(FXDIB_BLEND_NORMAL) {}
965
~CPDF_RenderStatus()966 CPDF_RenderStatus::~CPDF_RenderStatus() {}
967
Initialize(CPDF_RenderContext * pContext,CFX_RenderDevice * pDevice,const CFX_Matrix * pDeviceMatrix,const CPDF_PageObject * pStopObj,const CPDF_RenderStatus * pParentState,const CPDF_GraphicStates * pInitialStates,const CPDF_RenderOptions * pOptions,int transparency,bool bDropObjects,CPDF_Dictionary * pFormResource,bool bStdCS,CPDF_Type3Char * pType3Char,FX_ARGB fill_color,uint32_t GroupFamily,bool bLoadMask)968 bool CPDF_RenderStatus::Initialize(CPDF_RenderContext* pContext,
969 CFX_RenderDevice* pDevice,
970 const CFX_Matrix* pDeviceMatrix,
971 const CPDF_PageObject* pStopObj,
972 const CPDF_RenderStatus* pParentState,
973 const CPDF_GraphicStates* pInitialStates,
974 const CPDF_RenderOptions* pOptions,
975 int transparency,
976 bool bDropObjects,
977 CPDF_Dictionary* pFormResource,
978 bool bStdCS,
979 CPDF_Type3Char* pType3Char,
980 FX_ARGB fill_color,
981 uint32_t GroupFamily,
982 bool bLoadMask) {
983 m_pContext = pContext;
984 m_pDevice = pDevice;
985 m_bPrint = m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
986 if (pDeviceMatrix) {
987 m_DeviceMatrix = *pDeviceMatrix;
988 }
989 m_pStopObj = pStopObj;
990 if (pOptions) {
991 m_Options = *pOptions;
992 }
993 m_bDropObjects = bDropObjects;
994 m_bStdCS = bStdCS;
995 m_T3FillColor = fill_color;
996 m_pType3Char = pType3Char;
997 m_GroupFamily = GroupFamily;
998 m_bLoadMask = bLoadMask;
999 m_pFormResource = pFormResource;
1000 m_pPageResource = m_pContext->GetPageResources();
1001 if (pInitialStates && !m_pType3Char) {
1002 m_InitialStates.CopyStates(*pInitialStates);
1003 if (pParentState) {
1004 if (!m_InitialStates.m_ColorState.HasFillColor()) {
1005 m_InitialStates.m_ColorState.SetFillRGB(
1006 pParentState->m_InitialStates.m_ColorState.GetFillRGB());
1007 m_InitialStates.m_ColorState.GetMutableFillColor()->Copy(
1008 pParentState->m_InitialStates.m_ColorState.GetFillColor());
1009 }
1010 if (!m_InitialStates.m_ColorState.HasStrokeColor()) {
1011 m_InitialStates.m_ColorState.SetStrokeRGB(
1012 pParentState->m_InitialStates.m_ColorState.GetFillRGB());
1013 m_InitialStates.m_ColorState.GetMutableStrokeColor()->Copy(
1014 pParentState->m_InitialStates.m_ColorState.GetStrokeColor());
1015 }
1016 }
1017 } else {
1018 m_InitialStates.DefaultStates();
1019 }
1020 m_pImageRenderer.reset();
1021 m_Transparency = transparency;
1022 return true;
1023 }
1024
RenderObjectList(const CPDF_PageObjectHolder * pObjectHolder,const CFX_Matrix * pObj2Device)1025 void CPDF_RenderStatus::RenderObjectList(
1026 const CPDF_PageObjectHolder* pObjectHolder,
1027 const CFX_Matrix* pObj2Device) {
1028 #if defined _SKIA_SUPPORT_
1029 DebugVerifyDeviceIsPreMultiplied();
1030 #endif
1031 CFX_FloatRect clip_rect(m_pDevice->GetClipBox());
1032 CFX_Matrix device2object;
1033 device2object.SetReverse(*pObj2Device);
1034 device2object.TransformRect(clip_rect);
1035
1036 for (const auto& pCurObj : *pObjectHolder->GetPageObjectList()) {
1037 if (pCurObj.get() == m_pStopObj) {
1038 m_bStopped = true;
1039 return;
1040 }
1041 if (!pCurObj)
1042 continue;
1043
1044 if (pCurObj->m_Left > clip_rect.right ||
1045 pCurObj->m_Right < clip_rect.left ||
1046 pCurObj->m_Bottom > clip_rect.top ||
1047 pCurObj->m_Top < clip_rect.bottom) {
1048 continue;
1049 }
1050 RenderSingleObject(pCurObj.get(), pObj2Device);
1051 if (m_bStopped)
1052 return;
1053 }
1054 #if defined _SKIA_SUPPORT_
1055 DebugVerifyDeviceIsPreMultiplied();
1056 #endif
1057 }
1058
RenderSingleObject(CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device)1059 void CPDF_RenderStatus::RenderSingleObject(CPDF_PageObject* pObj,
1060 const CFX_Matrix* pObj2Device) {
1061 #if defined _SKIA_SUPPORT_
1062 DebugVerifyDeviceIsPreMultiplied();
1063 #endif
1064 CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
1065 if (++s_CurrentRecursionDepth > kRenderMaxRecursionDepth) {
1066 return;
1067 }
1068 m_pCurObj = pObj;
1069 if (m_Options.m_pOCContext && pObj->m_ContentMark) {
1070 if (!m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
1071 return;
1072 }
1073 }
1074 ProcessClipPath(pObj->m_ClipPath, pObj2Device);
1075 if (ProcessTransparency(pObj, pObj2Device)) {
1076 return;
1077 }
1078 ProcessObjectNoClip(pObj, pObj2Device);
1079 #if defined _SKIA_SUPPORT_
1080 DebugVerifyDeviceIsPreMultiplied();
1081 #endif
1082 }
1083
ContinueSingleObject(CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device,IFX_Pause * pPause)1084 bool CPDF_RenderStatus::ContinueSingleObject(CPDF_PageObject* pObj,
1085 const CFX_Matrix* pObj2Device,
1086 IFX_Pause* pPause) {
1087 if (m_pImageRenderer) {
1088 if (m_pImageRenderer->Continue(pPause))
1089 return true;
1090
1091 if (!m_pImageRenderer->GetResult())
1092 DrawObjWithBackground(pObj, pObj2Device);
1093 m_pImageRenderer.reset();
1094 return false;
1095 }
1096
1097 m_pCurObj = pObj;
1098 if (m_Options.m_pOCContext && pObj->m_ContentMark &&
1099 !m_Options.m_pOCContext->CheckObjectVisible(pObj)) {
1100 return false;
1101 }
1102
1103 ProcessClipPath(pObj->m_ClipPath, pObj2Device);
1104 if (ProcessTransparency(pObj, pObj2Device))
1105 return false;
1106
1107 if (pObj->IsImage()) {
1108 m_pImageRenderer = pdfium::MakeUnique<CPDF_ImageRenderer>();
1109 if (!m_pImageRenderer->Start(this, pObj, pObj2Device, false,
1110 FXDIB_BLEND_NORMAL)) {
1111 if (!m_pImageRenderer->GetResult())
1112 DrawObjWithBackground(pObj, pObj2Device);
1113 m_pImageRenderer.reset();
1114 return false;
1115 }
1116 return ContinueSingleObject(pObj, pObj2Device, pPause);
1117 }
1118
1119 ProcessObjectNoClip(pObj, pObj2Device);
1120 return false;
1121 }
1122
GetObjectClippedRect(const CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device,bool bLogical,FX_RECT & rect) const1123 bool CPDF_RenderStatus::GetObjectClippedRect(const CPDF_PageObject* pObj,
1124 const CFX_Matrix* pObj2Device,
1125 bool bLogical,
1126 FX_RECT& rect) const {
1127 rect = pObj->GetBBox(pObj2Device);
1128 FX_RECT rtClip = m_pDevice->GetClipBox();
1129 if (!bLogical) {
1130 CFX_Matrix dCTM = m_pDevice->GetCTM();
1131 FX_FLOAT a = FXSYS_fabs(dCTM.a);
1132 FX_FLOAT d = FXSYS_fabs(dCTM.d);
1133 if (a != 1.0f || d != 1.0f) {
1134 rect.right = rect.left + (int32_t)FXSYS_ceil((FX_FLOAT)rect.Width() * a);
1135 rect.bottom = rect.top + (int32_t)FXSYS_ceil((FX_FLOAT)rect.Height() * d);
1136 rtClip.right =
1137 rtClip.left + (int32_t)FXSYS_ceil((FX_FLOAT)rtClip.Width() * a);
1138 rtClip.bottom =
1139 rtClip.top + (int32_t)FXSYS_ceil((FX_FLOAT)rtClip.Height() * d);
1140 }
1141 }
1142 rect.Intersect(rtClip);
1143 return rect.IsEmpty();
1144 }
1145
ProcessObjectNoClip(CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device)1146 void CPDF_RenderStatus::ProcessObjectNoClip(CPDF_PageObject* pObj,
1147 const CFX_Matrix* pObj2Device) {
1148 #if defined _SKIA_SUPPORT_
1149 DebugVerifyDeviceIsPreMultiplied();
1150 #endif
1151 bool bRet = false;
1152 switch (pObj->GetType()) {
1153 case CPDF_PageObject::TEXT:
1154 bRet = ProcessText(pObj->AsText(), pObj2Device, nullptr);
1155 break;
1156 case CPDF_PageObject::PATH:
1157 bRet = ProcessPath(pObj->AsPath(), pObj2Device);
1158 break;
1159 case CPDF_PageObject::IMAGE:
1160 bRet = ProcessImage(pObj->AsImage(), pObj2Device);
1161 break;
1162 case CPDF_PageObject::SHADING:
1163 ProcessShading(pObj->AsShading(), pObj2Device);
1164 return;
1165 case CPDF_PageObject::FORM:
1166 bRet = ProcessForm(pObj->AsForm(), pObj2Device);
1167 break;
1168 }
1169 if (!bRet)
1170 DrawObjWithBackground(pObj, pObj2Device);
1171 #if defined _SKIA_SUPPORT_
1172 DebugVerifyDeviceIsPreMultiplied();
1173 #endif
1174 }
1175
DrawObjWithBlend(CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device)1176 bool CPDF_RenderStatus::DrawObjWithBlend(CPDF_PageObject* pObj,
1177 const CFX_Matrix* pObj2Device) {
1178 bool bRet = false;
1179 switch (pObj->GetType()) {
1180 case CPDF_PageObject::PATH:
1181 bRet = ProcessPath(pObj->AsPath(), pObj2Device);
1182 break;
1183 case CPDF_PageObject::IMAGE:
1184 bRet = ProcessImage(pObj->AsImage(), pObj2Device);
1185 break;
1186 case CPDF_PageObject::FORM:
1187 bRet = ProcessForm(pObj->AsForm(), pObj2Device);
1188 break;
1189 default:
1190 break;
1191 }
1192 return bRet;
1193 }
1194
GetScaledMatrix(CFX_Matrix & matrix) const1195 void CPDF_RenderStatus::GetScaledMatrix(CFX_Matrix& matrix) const {
1196 CFX_Matrix dCTM = m_pDevice->GetCTM();
1197 matrix.a *= FXSYS_fabs(dCTM.a);
1198 matrix.d *= FXSYS_fabs(dCTM.d);
1199 }
1200
DrawObjWithBackground(CPDF_PageObject * pObj,const CFX_Matrix * pObj2Device)1201 void CPDF_RenderStatus::DrawObjWithBackground(CPDF_PageObject* pObj,
1202 const CFX_Matrix* pObj2Device) {
1203 FX_RECT rect;
1204 if (GetObjectClippedRect(pObj, pObj2Device, false, rect)) {
1205 return;
1206 }
1207 int res = 300;
1208 if (pObj->IsImage() &&
1209 m_pDevice->GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER) {
1210 res = 0;
1211 }
1212 CPDF_ScaledRenderBuffer buffer;
1213 if (!buffer.Initialize(m_pContext, m_pDevice, rect, pObj, &m_Options, res)) {
1214 return;
1215 }
1216 CFX_Matrix matrix = *pObj2Device;
1217 matrix.Concat(*buffer.GetMatrix());
1218 GetScaledMatrix(matrix);
1219 CPDF_Dictionary* pFormResource = nullptr;
1220 if (pObj->IsForm()) {
1221 const CPDF_FormObject* pFormObj = pObj->AsForm();
1222 if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
1223 pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
1224 }
1225 }
1226 CPDF_RenderStatus status;
1227 status.Initialize(m_pContext, buffer.GetDevice(), buffer.GetMatrix(), nullptr,
1228 nullptr, nullptr, &m_Options, m_Transparency,
1229 m_bDropObjects, pFormResource);
1230 status.RenderSingleObject(pObj, &matrix);
1231 buffer.OutputToDevice();
1232 }
1233
ProcessForm(const CPDF_FormObject * pFormObj,const CFX_Matrix * pObj2Device)1234 bool CPDF_RenderStatus::ProcessForm(const CPDF_FormObject* pFormObj,
1235 const CFX_Matrix* pObj2Device) {
1236 #if defined _SKIA_SUPPORT_
1237 DebugVerifyDeviceIsPreMultiplied();
1238 #endif
1239 CPDF_Dictionary* pOC = pFormObj->m_pForm->m_pFormDict->GetDictFor("OC");
1240 if (pOC && m_Options.m_pOCContext &&
1241 !m_Options.m_pOCContext->CheckOCGVisible(pOC)) {
1242 return true;
1243 }
1244 CFX_Matrix matrix = pFormObj->m_FormMatrix;
1245 matrix.Concat(*pObj2Device);
1246 CPDF_Dictionary* pResources = nullptr;
1247 if (pFormObj->m_pForm && pFormObj->m_pForm->m_pFormDict) {
1248 pResources = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
1249 }
1250 CPDF_RenderStatus status;
1251 status.Initialize(m_pContext, m_pDevice, nullptr, m_pStopObj, this, pFormObj,
1252 &m_Options, m_Transparency, m_bDropObjects, pResources,
1253 false);
1254 status.m_curBlend = m_curBlend;
1255 m_pDevice->SaveState();
1256 status.RenderObjectList(pFormObj->m_pForm.get(), &matrix);
1257 m_bStopped = status.m_bStopped;
1258 m_pDevice->RestoreState(false);
1259 #if defined _SKIA_SUPPORT_
1260 DebugVerifyDeviceIsPreMultiplied();
1261 #endif
1262 return true;
1263 }
1264
ProcessPath(CPDF_PathObject * pPathObj,const CFX_Matrix * pObj2Device)1265 bool CPDF_RenderStatus::ProcessPath(CPDF_PathObject* pPathObj,
1266 const CFX_Matrix* pObj2Device) {
1267 int FillType = pPathObj->m_FillType;
1268 bool bStroke = pPathObj->m_bStroke;
1269 ProcessPathPattern(pPathObj, pObj2Device, FillType, bStroke);
1270 if (FillType == 0 && !bStroke)
1271 return true;
1272
1273 uint32_t fill_argb = FillType ? GetFillArgb(pPathObj) : 0;
1274 uint32_t stroke_argb = bStroke ? GetStrokeArgb(pPathObj) : 0;
1275 CFX_Matrix path_matrix = pPathObj->m_Matrix;
1276 path_matrix.Concat(*pObj2Device);
1277 if (!IsAvailableMatrix(path_matrix))
1278 return true;
1279
1280 if (FillType && (m_Options.m_Flags & RENDER_RECT_AA))
1281 FillType |= FXFILL_RECT_AA;
1282 if (m_Options.m_Flags & RENDER_FILL_FULLCOVER)
1283 FillType |= FXFILL_FULLCOVER;
1284 if (m_Options.m_Flags & RENDER_NOPATHSMOOTH)
1285 FillType |= FXFILL_NOPATHSMOOTH;
1286 if (bStroke)
1287 FillType |= FX_FILL_STROKE;
1288
1289 const CPDF_PageObject* pPageObj =
1290 static_cast<const CPDF_PageObject*>(pPathObj);
1291 if (pPageObj->m_GeneralState.GetStrokeAdjust())
1292 FillType |= FX_STROKE_ADJUST;
1293 if (m_pType3Char)
1294 FillType |= FX_FILL_TEXT_MODE;
1295
1296 CFX_GraphState graphState = pPathObj->m_GraphState;
1297 if (m_Options.m_Flags & RENDER_THINLINE)
1298 graphState.SetLineWidth(0);
1299 return m_pDevice->DrawPathWithBlend(
1300 pPathObj->m_Path.GetObject(), &path_matrix, graphState.GetObject(),
1301 fill_argb, stroke_argb, FillType, m_curBlend);
1302 }
1303
GetTransferFunc(CPDF_Object * pObj) const1304 CPDF_TransferFunc* CPDF_RenderStatus::GetTransferFunc(CPDF_Object* pObj) const {
1305 ASSERT(pObj);
1306 CPDF_DocRenderData* pDocCache = m_pContext->GetDocument()->GetRenderData();
1307 return pDocCache ? pDocCache->GetTransferFunc(pObj) : nullptr;
1308 }
1309
GetFillArgb(CPDF_PageObject * pObj,bool bType3) const1310 FX_ARGB CPDF_RenderStatus::GetFillArgb(CPDF_PageObject* pObj,
1311 bool bType3) const {
1312 const CPDF_ColorState* pColorState = &pObj->m_ColorState;
1313 if (m_pType3Char && !bType3 &&
1314 (!m_pType3Char->m_bColored ||
1315 (m_pType3Char->m_bColored &&
1316 (!*pColorState || pColorState->GetFillColor()->IsNull())))) {
1317 return m_T3FillColor;
1318 }
1319 if (!*pColorState || pColorState->GetFillColor()->IsNull())
1320 pColorState = &m_InitialStates.m_ColorState;
1321
1322 FX_COLORREF rgb = pColorState->GetFillRGB();
1323 if (rgb == (uint32_t)-1)
1324 return 0;
1325
1326 int32_t alpha =
1327 static_cast<int32_t>((pObj->m_GeneralState.GetFillAlpha() * 255));
1328 if (pObj->m_GeneralState.GetTR()) {
1329 if (!pObj->m_GeneralState.GetTransferFunc()) {
1330 pObj->m_GeneralState.SetTransferFunc(
1331 GetTransferFunc(pObj->m_GeneralState.GetTR()));
1332 }
1333 if (pObj->m_GeneralState.GetTransferFunc())
1334 rgb = pObj->m_GeneralState.GetTransferFunc()->TranslateColor(rgb);
1335 }
1336 return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
1337 }
1338
GetStrokeArgb(CPDF_PageObject * pObj) const1339 FX_ARGB CPDF_RenderStatus::GetStrokeArgb(CPDF_PageObject* pObj) const {
1340 const CPDF_ColorState* pColorState = &pObj->m_ColorState;
1341 if (m_pType3Char &&
1342 (!m_pType3Char->m_bColored ||
1343 (m_pType3Char->m_bColored &&
1344 (!*pColorState || pColorState->GetStrokeColor()->IsNull())))) {
1345 return m_T3FillColor;
1346 }
1347 if (!*pColorState || pColorState->GetStrokeColor()->IsNull())
1348 pColorState = &m_InitialStates.m_ColorState;
1349
1350 FX_COLORREF rgb = pColorState->GetStrokeRGB();
1351 if (rgb == (uint32_t)-1)
1352 return 0;
1353
1354 int32_t alpha = static_cast<int32_t>(pObj->m_GeneralState.GetStrokeAlpha() *
1355 255); // not rounded.
1356 if (pObj->m_GeneralState.GetTR()) {
1357 if (!pObj->m_GeneralState.GetTransferFunc()) {
1358 pObj->m_GeneralState.SetTransferFunc(
1359 GetTransferFunc(pObj->m_GeneralState.GetTR()));
1360 }
1361 if (pObj->m_GeneralState.GetTransferFunc())
1362 rgb = pObj->m_GeneralState.GetTransferFunc()->TranslateColor(rgb);
1363 }
1364 return m_Options.TranslateColor(ArgbEncode(alpha, rgb));
1365 }
1366
ProcessClipPath(CPDF_ClipPath ClipPath,const CFX_Matrix * pObj2Device)1367 void CPDF_RenderStatus::ProcessClipPath(CPDF_ClipPath ClipPath,
1368 const CFX_Matrix* pObj2Device) {
1369 if (!ClipPath) {
1370 if (m_LastClipPath) {
1371 m_pDevice->RestoreState(true);
1372 m_LastClipPath.SetNull();
1373 }
1374 return;
1375 }
1376 if (m_LastClipPath == ClipPath)
1377 return;
1378
1379 m_LastClipPath = ClipPath;
1380 m_pDevice->RestoreState(true);
1381 int nClipPath = ClipPath.GetPathCount();
1382 for (int i = 0; i < nClipPath; ++i) {
1383 const CFX_PathData* pPathData = ClipPath.GetPath(i).GetObject();
1384 if (!pPathData)
1385 continue;
1386
1387 if (pPathData->GetPoints().empty()) {
1388 CFX_PathData EmptyPath;
1389 EmptyPath.AppendRect(-1, -1, 0, 0);
1390 int fill_mode = FXFILL_WINDING;
1391 m_pDevice->SetClip_PathFill(&EmptyPath, nullptr, fill_mode);
1392 } else {
1393 int ClipType = ClipPath.GetClipType(i);
1394 m_pDevice->SetClip_PathFill(pPathData, pObj2Device, ClipType);
1395 }
1396 }
1397 int textcount = ClipPath.GetTextCount();
1398 if (textcount == 0)
1399 return;
1400
1401 if (m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
1402 !(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP)) {
1403 return;
1404 }
1405
1406 std::unique_ptr<CFX_PathData> pTextClippingPath;
1407 for (int i = 0; i < textcount; ++i) {
1408 CPDF_TextObject* pText = ClipPath.GetText(i);
1409 if (pText) {
1410 if (!pTextClippingPath)
1411 pTextClippingPath = pdfium::MakeUnique<CFX_PathData>();
1412 ProcessText(pText, pObj2Device, pTextClippingPath.get());
1413 continue;
1414 }
1415
1416 if (!pTextClippingPath)
1417 continue;
1418
1419 int fill_mode = FXFILL_WINDING;
1420 if (m_Options.m_Flags & RENDER_NOTEXTSMOOTH)
1421 fill_mode |= FXFILL_NOPATHSMOOTH;
1422 m_pDevice->SetClip_PathFill(pTextClippingPath.get(), nullptr, fill_mode);
1423 pTextClippingPath.reset();
1424 }
1425 }
1426
SelectClipPath(const CPDF_PathObject * pPathObj,const CFX_Matrix * pObj2Device,bool bStroke)1427 bool CPDF_RenderStatus::SelectClipPath(const CPDF_PathObject* pPathObj,
1428 const CFX_Matrix* pObj2Device,
1429 bool bStroke) {
1430 CFX_Matrix path_matrix = pPathObj->m_Matrix;
1431 path_matrix.Concat(*pObj2Device);
1432 if (bStroke) {
1433 CFX_GraphState graphState = pPathObj->m_GraphState;
1434 if (m_Options.m_Flags & RENDER_THINLINE)
1435 graphState.SetLineWidth(0);
1436 return m_pDevice->SetClip_PathStroke(pPathObj->m_Path.GetObject(),
1437 &path_matrix, graphState.GetObject());
1438 }
1439 int fill_mode = pPathObj->m_FillType;
1440 if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
1441 fill_mode |= FXFILL_NOPATHSMOOTH;
1442 }
1443 return m_pDevice->SetClip_PathFill(pPathObj->m_Path.GetObject(), &path_matrix,
1444 fill_mode);
1445 }
1446
ProcessTransparency(CPDF_PageObject * pPageObj,const CFX_Matrix * pObj2Device)1447 bool CPDF_RenderStatus::ProcessTransparency(CPDF_PageObject* pPageObj,
1448 const CFX_Matrix* pObj2Device) {
1449 #if defined _SKIA_SUPPORT_
1450 DebugVerifyDeviceIsPreMultiplied();
1451 #endif
1452 int blend_type = pPageObj->m_GeneralState.GetBlendType();
1453 if (blend_type == FXDIB_BLEND_UNSUPPORTED)
1454 return true;
1455
1456 CPDF_Dictionary* pSMaskDict =
1457 ToDictionary(pPageObj->m_GeneralState.GetSoftMask());
1458 if (pSMaskDict) {
1459 if (pPageObj->IsImage() &&
1460 pPageObj->AsImage()->GetImage()->GetDict()->KeyExist("SMask")) {
1461 pSMaskDict = nullptr;
1462 }
1463 }
1464 CPDF_Dictionary* pFormResource = nullptr;
1465 FX_FLOAT group_alpha = 1.0f;
1466 int Transparency = m_Transparency;
1467 bool bGroupTransparent = false;
1468 if (pPageObj->IsForm()) {
1469 const CPDF_FormObject* pFormObj = pPageObj->AsForm();
1470 group_alpha = pFormObj->m_GeneralState.GetFillAlpha();
1471 Transparency = pFormObj->m_pForm->m_Transparency;
1472 bGroupTransparent = !!(Transparency & PDFTRANS_ISOLATED);
1473 if (pFormObj->m_pForm->m_pFormDict) {
1474 pFormResource = pFormObj->m_pForm->m_pFormDict->GetDictFor("Resources");
1475 }
1476 }
1477 bool bTextClip =
1478 (pPageObj->m_ClipPath && pPageObj->m_ClipPath.GetTextCount() &&
1479 m_pDevice->GetDeviceClass() == FXDC_DISPLAY &&
1480 !(m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SOFT_CLIP));
1481 if ((m_Options.m_Flags & RENDER_OVERPRINT) && pPageObj->IsImage() &&
1482 pPageObj->m_GeneralState.GetFillOP() &&
1483 pPageObj->m_GeneralState.GetStrokeOP()) {
1484 CPDF_Document* pDocument = nullptr;
1485 CPDF_Page* pPage = nullptr;
1486 if (m_pContext->GetPageCache()) {
1487 pPage = m_pContext->GetPageCache()->GetPage();
1488 pDocument = pPage->m_pDocument;
1489 } else {
1490 pDocument = pPageObj->AsImage()->GetImage()->GetDocument();
1491 }
1492 CPDF_Dictionary* pPageResources = pPage ? pPage->m_pPageResources : nullptr;
1493 CPDF_Object* pCSObj = pPageObj->AsImage()
1494 ->GetImage()
1495 ->GetStream()
1496 ->GetDict()
1497 ->GetDirectObjectFor("ColorSpace");
1498 CPDF_ColorSpace* pColorSpace =
1499 pDocument->LoadColorSpace(pCSObj, pPageResources);
1500 if (pColorSpace) {
1501 int format = pColorSpace->GetFamily();
1502 if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
1503 format == PDFCS_DEVICEN) {
1504 blend_type = FXDIB_BLEND_DARKEN;
1505 }
1506 pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
1507 }
1508 }
1509 if (!pSMaskDict && group_alpha == 1.0f && blend_type == FXDIB_BLEND_NORMAL &&
1510 !bTextClip && !bGroupTransparent) {
1511 return false;
1512 }
1513 bool isolated = !!(Transparency & PDFTRANS_ISOLATED);
1514 if (m_bPrint) {
1515 bool bRet = false;
1516 int rendCaps = m_pDevice->GetRenderCaps();
1517 if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
1518 (rendCaps & FXRC_BLEND_MODE)) {
1519 int oldBlend = m_curBlend;
1520 m_curBlend = blend_type;
1521 bRet = DrawObjWithBlend(pPageObj, pObj2Device);
1522 m_curBlend = oldBlend;
1523 }
1524 if (!bRet) {
1525 DrawObjWithBackground(pPageObj, pObj2Device);
1526 }
1527 return true;
1528 }
1529 FX_RECT rect = pPageObj->GetBBox(pObj2Device);
1530 rect.Intersect(m_pDevice->GetClipBox());
1531 if (rect.IsEmpty()) {
1532 return true;
1533 }
1534 CFX_Matrix deviceCTM = m_pDevice->GetCTM();
1535 FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
1536 FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
1537 int width = FXSYS_round((FX_FLOAT)rect.Width() * scaleX);
1538 int height = FXSYS_round((FX_FLOAT)rect.Height() * scaleY);
1539 CFX_FxgeDevice bitmap_device;
1540 std::unique_ptr<CFX_DIBitmap> oriDevice;
1541 if (!isolated && (m_pDevice->GetRenderCaps() & FXRC_GET_BITS)) {
1542 oriDevice = pdfium::MakeUnique<CFX_DIBitmap>();
1543 if (!m_pDevice->CreateCompatibleBitmap(oriDevice.get(), width, height))
1544 return true;
1545 m_pDevice->GetDIBits(oriDevice.get(), rect.left, rect.top);
1546 }
1547 if (!bitmap_device.Create(width, height, FXDIB_Argb, oriDevice.get()))
1548 return true;
1549 CFX_DIBitmap* bitmap = bitmap_device.GetBitmap();
1550 bitmap->Clear(0);
1551 CFX_Matrix new_matrix = *pObj2Device;
1552 new_matrix.Translate(-rect.left, -rect.top);
1553 new_matrix.Scale(scaleX, scaleY);
1554 std::unique_ptr<CFX_DIBitmap> pTextMask;
1555 if (bTextClip) {
1556 pTextMask = pdfium::MakeUnique<CFX_DIBitmap>();
1557 if (!pTextMask->Create(width, height, FXDIB_8bppMask))
1558 return true;
1559
1560 pTextMask->Clear(0);
1561 CFX_FxgeDevice text_device;
1562 text_device.Attach(pTextMask.get(), false, nullptr, false);
1563 for (uint32_t i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
1564 CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
1565 if (!textobj)
1566 break;
1567
1568 CFX_Matrix text_matrix = textobj->GetTextMatrix();
1569 CPDF_TextRenderer::DrawTextPath(
1570 &text_device, textobj->m_CharCodes, textobj->m_CharPos,
1571 textobj->m_TextState.GetFont(), textobj->m_TextState.GetFontSize(),
1572 &text_matrix, &new_matrix, textobj->m_GraphState.GetObject(),
1573 (FX_ARGB)-1, 0, nullptr, 0);
1574 }
1575 }
1576 CPDF_RenderStatus bitmap_render;
1577 bitmap_render.Initialize(m_pContext, &bitmap_device, nullptr, m_pStopObj,
1578 nullptr, nullptr, &m_Options, 0, m_bDropObjects,
1579 pFormResource, true);
1580 bitmap_render.ProcessObjectNoClip(pPageObj, &new_matrix);
1581 #if defined _SKIA_SUPPORT_PATHS_
1582 bitmap_device.Flush();
1583 bitmap->UnPreMultiply();
1584 #endif
1585 m_bStopped = bitmap_render.m_bStopped;
1586 if (pSMaskDict) {
1587 CFX_Matrix smask_matrix = *pPageObj->m_GeneralState.GetSMaskMatrix();
1588 smask_matrix.Concat(*pObj2Device);
1589 std::unique_ptr<CFX_DIBSource> pSMaskSource =
1590 LoadSMask(pSMaskDict, &rect, &smask_matrix);
1591 if (pSMaskSource)
1592 bitmap->MultiplyAlpha(pSMaskSource.get());
1593 }
1594 if (pTextMask) {
1595 bitmap->MultiplyAlpha(pTextMask.get());
1596 pTextMask.reset();
1597 }
1598 int32_t blitAlpha = 255;
1599 if (Transparency & PDFTRANS_GROUP && group_alpha != 1.0f) {
1600 blitAlpha = (int32_t)(group_alpha * 255);
1601 #ifndef _SKIA_SUPPORT_
1602 bitmap->MultiplyAlpha(blitAlpha);
1603 blitAlpha = 255;
1604 #endif
1605 }
1606 Transparency = m_Transparency;
1607 if (pPageObj->IsForm()) {
1608 Transparency |= PDFTRANS_GROUP;
1609 }
1610 CompositeDIBitmap(bitmap, rect.left, rect.top, 0, blitAlpha, blend_type,
1611 Transparency);
1612 #if defined _SKIA_SUPPORT_
1613 DebugVerifyDeviceIsPreMultiplied();
1614 #endif
1615 return true;
1616 }
1617
GetBackdrop(const CPDF_PageObject * pObj,const FX_RECT & rect,int & left,int & top,bool bBackAlphaRequired)1618 std::unique_ptr<CFX_DIBitmap> CPDF_RenderStatus::GetBackdrop(
1619 const CPDF_PageObject* pObj,
1620 const FX_RECT& rect,
1621 int& left,
1622 int& top,
1623 bool bBackAlphaRequired) {
1624 FX_RECT bbox = rect;
1625 bbox.Intersect(m_pDevice->GetClipBox());
1626 left = bbox.left;
1627 top = bbox.top;
1628 CFX_Matrix deviceCTM = m_pDevice->GetCTM();
1629 FX_FLOAT scaleX = FXSYS_fabs(deviceCTM.a);
1630 FX_FLOAT scaleY = FXSYS_fabs(deviceCTM.d);
1631 int width = FXSYS_round(bbox.Width() * scaleX);
1632 int height = FXSYS_round(bbox.Height() * scaleY);
1633 auto pBackdrop = pdfium::MakeUnique<CFX_DIBitmap>();
1634 if (bBackAlphaRequired && !m_bDropObjects)
1635 pBackdrop->Create(width, height, FXDIB_Argb);
1636 else
1637 m_pDevice->CreateCompatibleBitmap(pBackdrop.get(), width, height);
1638
1639 if (!pBackdrop->GetBuffer())
1640 return nullptr;
1641
1642 bool bNeedDraw;
1643 if (pBackdrop->HasAlpha())
1644 bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT);
1645 else
1646 bNeedDraw = !(m_pDevice->GetRenderCaps() & FXRC_GET_BITS);
1647
1648 if (!bNeedDraw) {
1649 m_pDevice->GetDIBits(pBackdrop.get(), left, top);
1650 return pBackdrop;
1651 }
1652
1653 CFX_Matrix FinalMatrix = m_DeviceMatrix;
1654 FinalMatrix.Translate(-left, -top);
1655 FinalMatrix.Scale(scaleX, scaleY);
1656 pBackdrop->Clear(pBackdrop->HasAlpha() ? 0 : 0xffffffff);
1657 CFX_FxgeDevice device;
1658 device.Attach(pBackdrop.get(), false, nullptr, false);
1659 m_pContext->Render(&device, pObj, &m_Options, &FinalMatrix);
1660 return pBackdrop;
1661 }
1662
CloneObjStates(const CPDF_GraphicStates * pSrcStates,bool bStroke)1663 CPDF_GraphicStates* CPDF_RenderStatus::CloneObjStates(
1664 const CPDF_GraphicStates* pSrcStates,
1665 bool bStroke) {
1666 if (!pSrcStates)
1667 return nullptr;
1668
1669 CPDF_GraphicStates* pStates = new CPDF_GraphicStates;
1670 pStates->CopyStates(*pSrcStates);
1671 const CPDF_Color* pObjColor = bStroke
1672 ? pSrcStates->m_ColorState.GetStrokeColor()
1673 : pSrcStates->m_ColorState.GetFillColor();
1674 if (!pObjColor->IsNull()) {
1675 pStates->m_ColorState.SetFillRGB(
1676 bStroke ? pSrcStates->m_ColorState.GetStrokeRGB()
1677 : pSrcStates->m_ColorState.GetFillRGB());
1678 pStates->m_ColorState.SetStrokeRGB(pStates->m_ColorState.GetFillRGB());
1679 }
1680 return pStates;
1681 }
1682
1683 #if defined _SKIA_SUPPORT_
DebugVerifyDeviceIsPreMultiplied() const1684 void CPDF_RenderStatus::DebugVerifyDeviceIsPreMultiplied() const {
1685 m_pDevice->DebugVerifyBitmapIsPreMultiplied();
1686 }
1687 #endif
1688
ProcessText(CPDF_TextObject * textobj,const CFX_Matrix * pObj2Device,CFX_PathData * pClippingPath)1689 bool CPDF_RenderStatus::ProcessText(CPDF_TextObject* textobj,
1690 const CFX_Matrix* pObj2Device,
1691 CFX_PathData* pClippingPath) {
1692 if (textobj->m_CharCodes.empty())
1693 return true;
1694
1695 const TextRenderingMode text_render_mode = textobj->m_TextState.GetTextMode();
1696 if (text_render_mode == TextRenderingMode::MODE_INVISIBLE)
1697 return true;
1698
1699 CPDF_Font* pFont = textobj->m_TextState.GetFont();
1700 if (pFont->IsType3Font())
1701 return ProcessType3Text(textobj, pObj2Device);
1702
1703 bool bFill = false;
1704 bool bStroke = false;
1705 bool bClip = false;
1706 if (pClippingPath) {
1707 bClip = true;
1708 } else {
1709 switch (text_render_mode) {
1710 case TextRenderingMode::MODE_FILL:
1711 case TextRenderingMode::MODE_FILL_CLIP:
1712 bFill = true;
1713 break;
1714 case TextRenderingMode::MODE_STROKE:
1715 case TextRenderingMode::MODE_STROKE_CLIP:
1716 if (pFont->GetFace())
1717 bStroke = true;
1718 else
1719 bFill = true;
1720 break;
1721 case TextRenderingMode::MODE_FILL_STROKE:
1722 case TextRenderingMode::MODE_FILL_STROKE_CLIP:
1723 bFill = true;
1724 if (pFont->GetFace())
1725 bStroke = true;
1726 break;
1727 case TextRenderingMode::MODE_INVISIBLE:
1728 // Already handled above, but the compiler is not smart enough to
1729 // realize it. Fall through.
1730 ASSERT(false);
1731 case TextRenderingMode::MODE_CLIP:
1732 return true;
1733 }
1734 }
1735 FX_ARGB stroke_argb = 0;
1736 FX_ARGB fill_argb = 0;
1737 bool bPattern = false;
1738 if (bStroke) {
1739 if (textobj->m_ColorState.GetStrokeColor()->IsPattern()) {
1740 bPattern = true;
1741 } else {
1742 stroke_argb = GetStrokeArgb(textobj);
1743 }
1744 }
1745 if (bFill) {
1746 if (textobj->m_ColorState.GetFillColor()->IsPattern()) {
1747 bPattern = true;
1748 } else {
1749 fill_argb = GetFillArgb(textobj);
1750 }
1751 }
1752 CFX_Matrix text_matrix = textobj->GetTextMatrix();
1753 if (!IsAvailableMatrix(text_matrix))
1754 return true;
1755
1756 FX_FLOAT font_size = textobj->m_TextState.GetFontSize();
1757 if (bPattern) {
1758 DrawTextPathWithPattern(textobj, pObj2Device, pFont, font_size,
1759 &text_matrix, bFill, bStroke);
1760 return true;
1761 }
1762 if (bClip || bStroke) {
1763 const CFX_Matrix* pDeviceMatrix = pObj2Device;
1764 CFX_Matrix device_matrix;
1765 if (bStroke) {
1766 const FX_FLOAT* pCTM = textobj->m_TextState.GetCTM();
1767 if (pCTM[0] != 1.0f || pCTM[3] != 1.0f) {
1768 CFX_Matrix ctm(pCTM[0], pCTM[1], pCTM[2], pCTM[3], 0, 0);
1769 text_matrix.ConcatInverse(ctm);
1770 device_matrix = ctm;
1771 device_matrix.Concat(*pObj2Device);
1772 pDeviceMatrix = &device_matrix;
1773 }
1774 }
1775 int flag = 0;
1776 if (bStroke && bFill) {
1777 flag |= FX_FILL_STROKE;
1778 flag |= FX_STROKE_TEXT_MODE;
1779 }
1780 if (textobj->m_GeneralState.GetStrokeAdjust())
1781 flag |= FX_STROKE_ADJUST;
1782 if (m_Options.m_Flags & RENDER_NOTEXTSMOOTH)
1783 flag |= FXFILL_NOPATHSMOOTH;
1784 return CPDF_TextRenderer::DrawTextPath(
1785 m_pDevice, textobj->m_CharCodes, textobj->m_CharPos, pFont, font_size,
1786 &text_matrix, pDeviceMatrix, textobj->m_GraphState.GetObject(),
1787 fill_argb, stroke_argb, pClippingPath, flag);
1788 }
1789 text_matrix.Concat(*pObj2Device);
1790 return CPDF_TextRenderer::DrawNormalText(m_pDevice, textobj->m_CharCodes,
1791 textobj->m_CharPos, pFont, font_size,
1792 &text_matrix, fill_argb, &m_Options);
1793 }
1794
GetCachedType3(CPDF_Type3Font * pFont)1795 CPDF_Type3Cache* CPDF_RenderStatus::GetCachedType3(CPDF_Type3Font* pFont) {
1796 if (!pFont->m_pDocument) {
1797 return nullptr;
1798 }
1799 pFont->m_pDocument->GetPageData()->GetFont(pFont->GetFontDict());
1800 return pFont->m_pDocument->GetRenderData()->GetCachedType3(pFont);
1801 }
1802
1803 // TODO(npm): Font fallback for type 3 fonts? (Completely separate code!!)
ProcessType3Text(CPDF_TextObject * textobj,const CFX_Matrix * pObj2Device)1804 bool CPDF_RenderStatus::ProcessType3Text(CPDF_TextObject* textobj,
1805 const CFX_Matrix* pObj2Device) {
1806 CPDF_Type3Font* pType3Font = textobj->m_TextState.GetFont()->AsType3Font();
1807 if (pdfium::ContainsValue(m_Type3FontCache, pType3Font))
1808 return true;
1809
1810 CFX_Matrix dCTM = m_pDevice->GetCTM();
1811 FX_FLOAT sa = FXSYS_fabs(dCTM.a);
1812 FX_FLOAT sd = FXSYS_fabs(dCTM.d);
1813 CFX_Matrix text_matrix = textobj->GetTextMatrix();
1814 CFX_Matrix char_matrix = pType3Font->GetFontMatrix();
1815 FX_FLOAT font_size = textobj->m_TextState.GetFontSize();
1816 char_matrix.Scale(font_size, font_size);
1817 FX_ARGB fill_argb = GetFillArgb(textobj, true);
1818 int fill_alpha = FXARGB_A(fill_argb);
1819 int device_class = m_pDevice->GetDeviceClass();
1820 std::vector<FXTEXT_GLYPHPOS> glyphs;
1821 if (device_class == FXDC_DISPLAY)
1822 glyphs.resize(textobj->m_CharCodes.size());
1823 else if (fill_alpha < 255)
1824 return false;
1825
1826 CPDF_RefType3Cache refTypeCache(pType3Font);
1827 for (int iChar = 0; iChar < pdfium::CollectionSize<int>(textobj->m_CharCodes);
1828 iChar++) {
1829 uint32_t charcode = textobj->m_CharCodes[iChar];
1830 if (charcode == static_cast<uint32_t>(-1))
1831 continue;
1832
1833 CPDF_Type3Char* pType3Char = pType3Font->LoadChar(charcode);
1834 if (!pType3Char)
1835 continue;
1836
1837 CFX_Matrix matrix = char_matrix;
1838 matrix.e += iChar ? textobj->m_CharPos[iChar - 1] : 0;
1839 matrix.Concat(text_matrix);
1840 matrix.Concat(*pObj2Device);
1841 if (!pType3Char->LoadBitmap(m_pContext)) {
1842 if (!glyphs.empty()) {
1843 for (int i = 0; i < iChar; i++) {
1844 const FXTEXT_GLYPHPOS& glyph = glyphs[i];
1845 if (!glyph.m_pGlyph)
1846 continue;
1847
1848 m_pDevice->SetBitMask(&glyph.m_pGlyph->m_Bitmap,
1849 glyph.m_Origin.x + glyph.m_pGlyph->m_Left,
1850 glyph.m_Origin.y - glyph.m_pGlyph->m_Top,
1851 fill_argb);
1852 }
1853 glyphs.clear();
1854 }
1855 CPDF_GraphicStates* pStates = CloneObjStates(textobj, false);
1856 CPDF_RenderOptions Options = m_Options;
1857 Options.m_Flags |= RENDER_FORCE_HALFTONE | RENDER_RECT_AA;
1858 Options.m_Flags &= ~RENDER_FORCE_DOWNSAMPLE;
1859 CPDF_Dictionary* pFormResource = nullptr;
1860 if (pType3Char->m_pForm && pType3Char->m_pForm->m_pFormDict) {
1861 pFormResource =
1862 pType3Char->m_pForm->m_pFormDict->GetDictFor("Resources");
1863 }
1864 if (fill_alpha == 255) {
1865 CPDF_RenderStatus status;
1866 status.Initialize(m_pContext, m_pDevice, nullptr, nullptr, this,
1867 pStates, &Options,
1868 pType3Char->m_pForm->m_Transparency, m_bDropObjects,
1869 pFormResource, false, pType3Char, fill_argb);
1870 status.m_Type3FontCache = m_Type3FontCache;
1871 status.m_Type3FontCache.push_back(pType3Font);
1872 m_pDevice->SaveState();
1873 status.RenderObjectList(pType3Char->m_pForm.get(), &matrix);
1874 m_pDevice->RestoreState(false);
1875 } else {
1876 CFX_FloatRect rect_f = pType3Char->m_pForm->CalcBoundingBox();
1877 matrix.TransformRect(rect_f);
1878
1879 FX_RECT rect = rect_f.GetOuterRect();
1880 CFX_FxgeDevice bitmap_device;
1881 if (!bitmap_device.Create((int)(rect.Width() * sa),
1882 (int)(rect.Height() * sd), FXDIB_Argb,
1883 nullptr)) {
1884 return true;
1885 }
1886 bitmap_device.GetBitmap()->Clear(0);
1887 CPDF_RenderStatus status;
1888 status.Initialize(m_pContext, &bitmap_device, nullptr, nullptr, this,
1889 pStates, &Options,
1890 pType3Char->m_pForm->m_Transparency, m_bDropObjects,
1891 pFormResource, false, pType3Char, fill_argb);
1892 status.m_Type3FontCache = m_Type3FontCache;
1893 status.m_Type3FontCache.push_back(pType3Font);
1894 matrix.Translate(-rect.left, -rect.top);
1895 matrix.Scale(sa, sd);
1896 status.RenderObjectList(pType3Char->m_pForm.get(), &matrix);
1897 m_pDevice->SetDIBits(bitmap_device.GetBitmap(), rect.left, rect.top);
1898 }
1899 delete pStates;
1900 } else if (pType3Char->m_pBitmap) {
1901 if (device_class == FXDC_DISPLAY) {
1902 CPDF_Type3Cache* pCache = GetCachedType3(pType3Font);
1903 refTypeCache.m_dwCount++;
1904 CFX_GlyphBitmap* pBitmap = pCache->LoadGlyph(charcode, &matrix, sa, sd);
1905 if (!pBitmap)
1906 continue;
1907
1908 CFX_Point origin(FXSYS_round(matrix.e), FXSYS_round(matrix.f));
1909 if (glyphs.empty()) {
1910 m_pDevice->SetBitMask(&pBitmap->m_Bitmap, origin.x + pBitmap->m_Left,
1911 origin.y - pBitmap->m_Top, fill_argb);
1912 } else {
1913 glyphs[iChar].m_pGlyph = pBitmap;
1914 glyphs[iChar].m_Origin = origin;
1915 }
1916 } else {
1917 CFX_Matrix image_matrix = pType3Char->m_ImageMatrix;
1918 image_matrix.Concat(matrix);
1919 CPDF_ImageRenderer renderer;
1920 if (renderer.Start(this, pType3Char->m_pBitmap.get(), fill_argb, 255,
1921 &image_matrix, 0, false, FXDIB_BLEND_NORMAL)) {
1922 renderer.Continue(nullptr);
1923 }
1924 if (!renderer.GetResult())
1925 return false;
1926 }
1927 }
1928 }
1929
1930 if (glyphs.empty())
1931 return true;
1932
1933 FX_RECT rect = FXGE_GetGlyphsBBox(glyphs, 0, sa, sd);
1934 CFX_DIBitmap bitmap;
1935 if (!bitmap.Create(static_cast<int>(rect.Width() * sa),
1936 static_cast<int>(rect.Height() * sd), FXDIB_8bppMask)) {
1937 return true;
1938 }
1939 bitmap.Clear(0);
1940 for (const FXTEXT_GLYPHPOS& glyph : glyphs) {
1941 if (!glyph.m_pGlyph)
1942 continue;
1943
1944 pdfium::base::CheckedNumeric<int> left = glyph.m_Origin.x;
1945 left += glyph.m_pGlyph->m_Left;
1946 left -= rect.left;
1947 left *= sa;
1948 if (!left.IsValid())
1949 continue;
1950
1951 pdfium::base::CheckedNumeric<int> top = glyph.m_Origin.y;
1952 top -= glyph.m_pGlyph->m_Top;
1953 top -= rect.top;
1954 top *= sd;
1955 if (!top.IsValid())
1956 continue;
1957
1958 bitmap.CompositeMask(left.ValueOrDie(), top.ValueOrDie(),
1959 glyph.m_pGlyph->m_Bitmap.GetWidth(),
1960 glyph.m_pGlyph->m_Bitmap.GetHeight(),
1961 &glyph.m_pGlyph->m_Bitmap, fill_argb, 0, 0,
1962 FXDIB_BLEND_NORMAL, nullptr, false, 0, nullptr);
1963 }
1964 m_pDevice->SetBitMask(&bitmap, rect.left, rect.top, fill_argb);
1965 return true;
1966 }
1967
DrawTextPathWithPattern(const CPDF_TextObject * textobj,const CFX_Matrix * pObj2Device,CPDF_Font * pFont,FX_FLOAT font_size,const CFX_Matrix * pTextMatrix,bool bFill,bool bStroke)1968 void CPDF_RenderStatus::DrawTextPathWithPattern(const CPDF_TextObject* textobj,
1969 const CFX_Matrix* pObj2Device,
1970 CPDF_Font* pFont,
1971 FX_FLOAT font_size,
1972 const CFX_Matrix* pTextMatrix,
1973 bool bFill,
1974 bool bStroke) {
1975 if (!bStroke) {
1976 CPDF_PathObject path;
1977 std::vector<std::unique_ptr<CPDF_TextObject>> pCopy;
1978 pCopy.push_back(std::unique_ptr<CPDF_TextObject>(textobj->Clone()));
1979 path.m_bStroke = false;
1980 path.m_FillType = FXFILL_WINDING;
1981 path.m_ClipPath.AppendTexts(&pCopy);
1982 path.m_ColorState = textobj->m_ColorState;
1983 path.m_Path.AppendRect(textobj->m_Left, textobj->m_Bottom, textobj->m_Right,
1984 textobj->m_Top);
1985 path.m_Left = textobj->m_Left;
1986 path.m_Bottom = textobj->m_Bottom;
1987 path.m_Right = textobj->m_Right;
1988 path.m_Top = textobj->m_Top;
1989 RenderSingleObject(&path, pObj2Device);
1990 return;
1991 }
1992 CPDF_CharPosList CharPosList;
1993 CharPosList.Load(textobj->m_CharCodes, textobj->m_CharPos, pFont, font_size);
1994 for (uint32_t i = 0; i < CharPosList.m_nChars; i++) {
1995 FXTEXT_CHARPOS& charpos = CharPosList.m_pCharPos[i];
1996 auto font =
1997 charpos.m_FallbackFontPosition == -1
1998 ? &pFont->m_Font
1999 : pFont->m_FontFallbacks[charpos.m_FallbackFontPosition].get();
2000 const CFX_PathData* pPath =
2001 font->LoadGlyphPath(charpos.m_GlyphIndex, charpos.m_FontCharWidth);
2002 if (!pPath)
2003 continue;
2004
2005 CPDF_PathObject path;
2006 path.m_GraphState = textobj->m_GraphState;
2007 path.m_ColorState = textobj->m_ColorState;
2008
2009 CFX_Matrix matrix;
2010 if (charpos.m_bGlyphAdjust) {
2011 matrix = CFX_Matrix(charpos.m_AdjustMatrix[0], charpos.m_AdjustMatrix[1],
2012 charpos.m_AdjustMatrix[2], charpos.m_AdjustMatrix[3],
2013 0, 0);
2014 }
2015 matrix.Concat(CFX_Matrix(font_size, 0, 0, font_size, charpos.m_Origin.x,
2016 charpos.m_Origin.y));
2017 path.m_Path.Append(pPath, &matrix);
2018 path.m_Matrix = *pTextMatrix;
2019 path.m_bStroke = bStroke;
2020 path.m_FillType = bFill ? FXFILL_WINDING : 0;
2021 path.CalcBoundingBox();
2022 ProcessPath(&path, pObj2Device);
2023 }
2024 }
2025
DrawShading(CPDF_ShadingPattern * pPattern,CFX_Matrix * pMatrix,FX_RECT & clip_rect,int alpha,bool bAlphaMode)2026 void CPDF_RenderStatus::DrawShading(CPDF_ShadingPattern* pPattern,
2027 CFX_Matrix* pMatrix,
2028 FX_RECT& clip_rect,
2029 int alpha,
2030 bool bAlphaMode) {
2031 const auto& funcs = pPattern->GetFuncs();
2032 CPDF_Dictionary* pDict = pPattern->GetShadingObject()->GetDict();
2033 CPDF_ColorSpace* pColorSpace = pPattern->GetCS();
2034 if (!pColorSpace)
2035 return;
2036
2037 FX_ARGB background = 0;
2038 if (!pPattern->IsShadingObject() && pDict->KeyExist("Background")) {
2039 CPDF_Array* pBackColor = pDict->GetArrayFor("Background");
2040 if (pBackColor &&
2041 pBackColor->GetCount() >= pColorSpace->CountComponents()) {
2042 CFX_FixedBufGrow<FX_FLOAT, 16> comps(pColorSpace->CountComponents());
2043 for (uint32_t i = 0; i < pColorSpace->CountComponents(); i++)
2044 comps[i] = pBackColor->GetNumberAt(i);
2045 FX_FLOAT R = 0.0f, G = 0.0f, B = 0.0f;
2046 pColorSpace->GetRGB(comps, R, G, B);
2047 background = ArgbEncode(255, (int32_t)(R * 255), (int32_t)(G * 255),
2048 (int32_t)(B * 255));
2049 }
2050 }
2051 if (pDict->KeyExist("BBox")) {
2052 CFX_FloatRect rect = pDict->GetRectFor("BBox");
2053 pMatrix->TransformRect(rect);
2054 clip_rect.Intersect(rect.GetOuterRect());
2055 }
2056 if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_SHADING &&
2057 m_pDevice->GetDeviceDriver()->DrawShading(pPattern, pMatrix, clip_rect,
2058 alpha, bAlphaMode)) {
2059 return;
2060 }
2061 CPDF_DeviceBuffer buffer;
2062 buffer.Initialize(m_pContext, m_pDevice, &clip_rect, m_pCurObj, 150);
2063 CFX_Matrix FinalMatrix = *pMatrix;
2064 FinalMatrix.Concat(*buffer.GetMatrix());
2065 CFX_DIBitmap* pBitmap = buffer.GetBitmap();
2066 if (!pBitmap->GetBuffer())
2067 return;
2068
2069 pBitmap->Clear(background);
2070 int fill_mode = m_Options.m_Flags;
2071 switch (pPattern->GetShadingType()) {
2072 case kInvalidShading:
2073 case kMaxShading:
2074 return;
2075 case kFunctionBasedShading:
2076 DrawFuncShading(pBitmap, &FinalMatrix, pDict, funcs, pColorSpace, alpha);
2077 break;
2078 case kAxialShading:
2079 DrawAxialShading(pBitmap, &FinalMatrix, pDict, funcs, pColorSpace, alpha);
2080 break;
2081 case kRadialShading:
2082 DrawRadialShading(pBitmap, &FinalMatrix, pDict, funcs, pColorSpace,
2083 alpha);
2084 break;
2085 case kFreeFormGouraudTriangleMeshShading: {
2086 // The shading object can be a stream or a dictionary. We do not handle
2087 // the case of dictionary at the moment.
2088 if (CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
2089 DrawFreeGouraudShading(pBitmap, &FinalMatrix, pStream, funcs,
2090 pColorSpace, alpha);
2091 }
2092 } break;
2093 case kLatticeFormGouraudTriangleMeshShading: {
2094 // The shading object can be a stream or a dictionary. We do not handle
2095 // the case of dictionary at the moment.
2096 if (CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
2097 DrawLatticeGouraudShading(pBitmap, &FinalMatrix, pStream, funcs,
2098 pColorSpace, alpha);
2099 }
2100 } break;
2101 case kCoonsPatchMeshShading:
2102 case kTensorProductPatchMeshShading: {
2103 // The shading object can be a stream or a dictionary. We do not handle
2104 // the case of dictionary at the moment.
2105 if (CPDF_Stream* pStream = ToStream(pPattern->GetShadingObject())) {
2106 DrawCoonPatchMeshes(pPattern->GetShadingType(), pBitmap, &FinalMatrix,
2107 pStream, funcs, pColorSpace, fill_mode, alpha);
2108 }
2109 } break;
2110 }
2111 if (bAlphaMode)
2112 pBitmap->LoadChannel(FXDIB_Red, pBitmap, FXDIB_Alpha);
2113
2114 if (m_Options.m_ColorMode == RENDER_COLOR_GRAY)
2115 pBitmap->ConvertColorScale(m_Options.m_ForeColor, m_Options.m_BackColor);
2116 buffer.OutputToDevice();
2117 }
2118
DrawShadingPattern(CPDF_ShadingPattern * pattern,const CPDF_PageObject * pPageObj,const CFX_Matrix * pObj2Device,bool bStroke)2119 void CPDF_RenderStatus::DrawShadingPattern(CPDF_ShadingPattern* pattern,
2120 const CPDF_PageObject* pPageObj,
2121 const CFX_Matrix* pObj2Device,
2122 bool bStroke) {
2123 if (!pattern->Load())
2124 return;
2125
2126 m_pDevice->SaveState();
2127 if (pPageObj->IsPath()) {
2128 if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
2129 m_pDevice->RestoreState(false);
2130 return;
2131 }
2132 } else if (pPageObj->IsImage()) {
2133 m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
2134 } else {
2135 return;
2136 }
2137 FX_RECT rect;
2138 if (GetObjectClippedRect(pPageObj, pObj2Device, false, rect)) {
2139 m_pDevice->RestoreState(false);
2140 return;
2141 }
2142 CFX_Matrix matrix = *pattern->pattern_to_form();
2143 matrix.Concat(*pObj2Device);
2144 GetScaledMatrix(matrix);
2145 int alpha =
2146 FXSYS_round(255 * (bStroke ? pPageObj->m_GeneralState.GetStrokeAlpha()
2147 : pPageObj->m_GeneralState.GetFillAlpha()));
2148 DrawShading(pattern, &matrix, rect, alpha,
2149 m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
2150 m_pDevice->RestoreState(false);
2151 }
2152
ProcessShading(const CPDF_ShadingObject * pShadingObj,const CFX_Matrix * pObj2Device)2153 void CPDF_RenderStatus::ProcessShading(const CPDF_ShadingObject* pShadingObj,
2154 const CFX_Matrix* pObj2Device) {
2155 FX_RECT rect = pShadingObj->GetBBox(pObj2Device);
2156 FX_RECT clip_box = m_pDevice->GetClipBox();
2157 rect.Intersect(clip_box);
2158 if (rect.IsEmpty())
2159 return;
2160
2161 CFX_Matrix matrix = pShadingObj->m_Matrix;
2162 matrix.Concat(*pObj2Device);
2163 DrawShading(pShadingObj->m_pShading, &matrix, rect,
2164 FXSYS_round(255 * pShadingObj->m_GeneralState.GetFillAlpha()),
2165 m_Options.m_ColorMode == RENDER_COLOR_ALPHA);
2166 }
2167
DrawTilingPattern(CPDF_TilingPattern * pPattern,CPDF_PageObject * pPageObj,const CFX_Matrix * pObj2Device,bool bStroke)2168 void CPDF_RenderStatus::DrawTilingPattern(CPDF_TilingPattern* pPattern,
2169 CPDF_PageObject* pPageObj,
2170 const CFX_Matrix* pObj2Device,
2171 bool bStroke) {
2172 if (!pPattern->Load()) {
2173 return;
2174 }
2175 m_pDevice->SaveState();
2176 if (pPageObj->IsPath()) {
2177 if (!SelectClipPath(pPageObj->AsPath(), pObj2Device, bStroke)) {
2178 m_pDevice->RestoreState(false);
2179 return;
2180 }
2181 } else if (pPageObj->IsImage()) {
2182 m_pDevice->SetClip_Rect(pPageObj->GetBBox(pObj2Device));
2183 } else {
2184 return;
2185 }
2186 FX_RECT clip_box = m_pDevice->GetClipBox();
2187 if (clip_box.IsEmpty()) {
2188 m_pDevice->RestoreState(false);
2189 return;
2190 }
2191 CFX_Matrix dCTM = m_pDevice->GetCTM();
2192 FX_FLOAT sa = FXSYS_fabs(dCTM.a);
2193 FX_FLOAT sd = FXSYS_fabs(dCTM.d);
2194 clip_box.right = clip_box.left + (int32_t)FXSYS_ceil(clip_box.Width() * sa);
2195 clip_box.bottom = clip_box.top + (int32_t)FXSYS_ceil(clip_box.Height() * sd);
2196 CFX_Matrix mtPattern2Device = *pPattern->pattern_to_form();
2197 mtPattern2Device.Concat(*pObj2Device);
2198 GetScaledMatrix(mtPattern2Device);
2199 bool bAligned = false;
2200 if (pPattern->bbox().left == 0 && pPattern->bbox().bottom == 0 &&
2201 pPattern->bbox().right == pPattern->x_step() &&
2202 pPattern->bbox().top == pPattern->y_step() &&
2203 (mtPattern2Device.IsScaled() || mtPattern2Device.Is90Rotated())) {
2204 bAligned = true;
2205 }
2206 CFX_FloatRect cell_bbox = pPattern->bbox();
2207 mtPattern2Device.TransformRect(cell_bbox);
2208 int width = (int)FXSYS_ceil(cell_bbox.Width());
2209 int height = (int)FXSYS_ceil(cell_bbox.Height());
2210 if (width == 0) {
2211 width = 1;
2212 }
2213 if (height == 0) {
2214 height = 1;
2215 }
2216 int min_col, max_col, min_row, max_row;
2217 CFX_Matrix mtDevice2Pattern;
2218 mtDevice2Pattern.SetReverse(mtPattern2Device);
2219
2220 CFX_FloatRect clip_box_p(clip_box);
2221 mtDevice2Pattern.TransformRect(clip_box_p);
2222
2223 min_col = (int)FXSYS_ceil((clip_box_p.left - pPattern->bbox().right) /
2224 pPattern->x_step());
2225 max_col = (int)FXSYS_floor((clip_box_p.right - pPattern->bbox().left) /
2226 pPattern->x_step());
2227 min_row = (int)FXSYS_ceil((clip_box_p.bottom - pPattern->bbox().top) /
2228 pPattern->y_step());
2229 max_row = (int)FXSYS_floor((clip_box_p.top - pPattern->bbox().bottom) /
2230 pPattern->y_step());
2231
2232 if (width > clip_box.Width() || height > clip_box.Height() ||
2233 width * height > clip_box.Width() * clip_box.Height()) {
2234 CPDF_GraphicStates* pStates = nullptr;
2235 if (!pPattern->colored())
2236 pStates = CloneObjStates(pPageObj, bStroke);
2237
2238 CPDF_Dictionary* pFormResource = nullptr;
2239 if (pPattern->form()->m_pFormDict)
2240 pFormResource = pPattern->form()->m_pFormDict->GetDictFor("Resources");
2241
2242 for (int col = min_col; col <= max_col; col++)
2243 for (int row = min_row; row <= max_row; row++) {
2244 CFX_PointF original = mtPattern2Device.Transform(
2245 CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step()));
2246 CFX_Matrix matrix = *pObj2Device;
2247 matrix.Translate(original.x - mtPattern2Device.e,
2248 original.y - mtPattern2Device.f);
2249 m_pDevice->SaveState();
2250 CPDF_RenderStatus status;
2251 status.Initialize(m_pContext, m_pDevice, nullptr, nullptr, this,
2252 pStates, &m_Options, pPattern->form()->m_Transparency,
2253 m_bDropObjects, pFormResource);
2254 status.RenderObjectList(pPattern->form(), &matrix);
2255 m_pDevice->RestoreState(false);
2256 }
2257 m_pDevice->RestoreState(false);
2258 delete pStates;
2259 return;
2260 }
2261 if (bAligned) {
2262 int orig_x = FXSYS_round(mtPattern2Device.e);
2263 int orig_y = FXSYS_round(mtPattern2Device.f);
2264 min_col = (clip_box.left - orig_x) / width;
2265 if (clip_box.left < orig_x) {
2266 min_col--;
2267 }
2268 max_col = (clip_box.right - orig_x) / width;
2269 if (clip_box.right <= orig_x) {
2270 max_col--;
2271 }
2272 min_row = (clip_box.top - orig_y) / height;
2273 if (clip_box.top < orig_y) {
2274 min_row--;
2275 }
2276 max_row = (clip_box.bottom - orig_y) / height;
2277 if (clip_box.bottom <= orig_y) {
2278 max_row--;
2279 }
2280 }
2281 FX_FLOAT left_offset = cell_bbox.left - mtPattern2Device.e;
2282 FX_FLOAT top_offset = cell_bbox.bottom - mtPattern2Device.f;
2283 std::unique_ptr<CFX_DIBitmap> pPatternBitmap;
2284 if (width * height < 16) {
2285 std::unique_ptr<CFX_DIBitmap> pEnlargedBitmap =
2286 DrawPatternBitmap(m_pContext->GetDocument(), m_pContext->GetPageCache(),
2287 pPattern, pObj2Device, 8, 8, m_Options.m_Flags);
2288 pPatternBitmap = pEnlargedBitmap->StretchTo(width, height);
2289 } else {
2290 pPatternBitmap = DrawPatternBitmap(
2291 m_pContext->GetDocument(), m_pContext->GetPageCache(), pPattern,
2292 pObj2Device, width, height, m_Options.m_Flags);
2293 }
2294 if (!pPatternBitmap) {
2295 m_pDevice->RestoreState(false);
2296 return;
2297 }
2298 if (m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
2299 pPatternBitmap->ConvertColorScale(m_Options.m_ForeColor,
2300 m_Options.m_BackColor);
2301 }
2302 FX_ARGB fill_argb = GetFillArgb(pPageObj);
2303 int clip_width = clip_box.right - clip_box.left;
2304 int clip_height = clip_box.bottom - clip_box.top;
2305 CFX_DIBitmap screen;
2306 if (!screen.Create(clip_width, clip_height, FXDIB_Argb)) {
2307 return;
2308 }
2309 screen.Clear(0);
2310 uint32_t* src_buf = (uint32_t*)pPatternBitmap->GetBuffer();
2311 for (int col = min_col; col <= max_col; col++) {
2312 for (int row = min_row; row <= max_row; row++) {
2313 int start_x, start_y;
2314 if (bAligned) {
2315 start_x = FXSYS_round(mtPattern2Device.e) + col * width - clip_box.left;
2316 start_y = FXSYS_round(mtPattern2Device.f) + row * height - clip_box.top;
2317 } else {
2318 CFX_PointF original = mtPattern2Device.Transform(
2319 CFX_PointF(col * pPattern->x_step(), row * pPattern->y_step()));
2320
2321 pdfium::base::CheckedNumeric<int> safeStartX =
2322 FXSYS_round(original.x + left_offset);
2323 pdfium::base::CheckedNumeric<int> safeStartY =
2324 FXSYS_round(original.y + top_offset);
2325
2326 safeStartX -= clip_box.left;
2327 safeStartY -= clip_box.top;
2328 if (!safeStartX.IsValid() || !safeStartY.IsValid())
2329 return;
2330
2331 start_x = safeStartX.ValueOrDie();
2332 start_y = safeStartY.ValueOrDie();
2333 }
2334 if (width == 1 && height == 1) {
2335 if (start_x < 0 || start_x >= clip_box.Width() || start_y < 0 ||
2336 start_y >= clip_box.Height()) {
2337 continue;
2338 }
2339 uint32_t* dest_buf =
2340 (uint32_t*)(screen.GetBuffer() + screen.GetPitch() * start_y +
2341 start_x * 4);
2342 if (pPattern->colored())
2343 *dest_buf = *src_buf;
2344 else
2345 *dest_buf = (*(uint8_t*)src_buf << 24) | (fill_argb & 0xffffff);
2346 } else {
2347 if (pPattern->colored()) {
2348 screen.CompositeBitmap(start_x, start_y, width, height,
2349 pPatternBitmap.get(), 0, 0);
2350 } else {
2351 screen.CompositeMask(start_x, start_y, width, height,
2352 pPatternBitmap.get(), fill_argb, 0, 0);
2353 }
2354 }
2355 }
2356 }
2357 CompositeDIBitmap(&screen, clip_box.left, clip_box.top, 0, 255,
2358 FXDIB_BLEND_NORMAL, false);
2359 m_pDevice->RestoreState(false);
2360 }
2361
DrawPathWithPattern(CPDF_PathObject * pPathObj,const CFX_Matrix * pObj2Device,const CPDF_Color * pColor,bool bStroke)2362 void CPDF_RenderStatus::DrawPathWithPattern(CPDF_PathObject* pPathObj,
2363 const CFX_Matrix* pObj2Device,
2364 const CPDF_Color* pColor,
2365 bool bStroke) {
2366 CPDF_Pattern* pattern = pColor->GetPattern();
2367 if (!pattern)
2368 return;
2369
2370 if (CPDF_TilingPattern* pTilingPattern = pattern->AsTilingPattern())
2371 DrawTilingPattern(pTilingPattern, pPathObj, pObj2Device, bStroke);
2372 else if (CPDF_ShadingPattern* pShadingPattern = pattern->AsShadingPattern())
2373 DrawShadingPattern(pShadingPattern, pPathObj, pObj2Device, bStroke);
2374 }
2375
ProcessPathPattern(CPDF_PathObject * pPathObj,const CFX_Matrix * pObj2Device,int & filltype,bool & bStroke)2376 void CPDF_RenderStatus::ProcessPathPattern(CPDF_PathObject* pPathObj,
2377 const CFX_Matrix* pObj2Device,
2378 int& filltype,
2379 bool& bStroke) {
2380 if (filltype) {
2381 const CPDF_Color& FillColor = *pPathObj->m_ColorState.GetFillColor();
2382 if (FillColor.IsPattern()) {
2383 DrawPathWithPattern(pPathObj, pObj2Device, &FillColor, false);
2384 filltype = 0;
2385 }
2386 }
2387 if (bStroke) {
2388 const CPDF_Color& StrokeColor = *pPathObj->m_ColorState.GetStrokeColor();
2389 if (StrokeColor.IsPattern()) {
2390 DrawPathWithPattern(pPathObj, pObj2Device, &StrokeColor, true);
2391 bStroke = false;
2392 }
2393 }
2394 }
2395
ProcessImage(CPDF_ImageObject * pImageObj,const CFX_Matrix * pObj2Device)2396 bool CPDF_RenderStatus::ProcessImage(CPDF_ImageObject* pImageObj,
2397 const CFX_Matrix* pObj2Device) {
2398 CPDF_ImageRenderer render;
2399 if (render.Start(this, pImageObj, pObj2Device, m_bStdCS, m_curBlend))
2400 render.Continue(nullptr);
2401 return render.GetResult();
2402 }
2403
CompositeDIBitmap(CFX_DIBitmap * pDIBitmap,int left,int top,FX_ARGB mask_argb,int bitmap_alpha,int blend_mode,int Transparency)2404 void CPDF_RenderStatus::CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
2405 int left,
2406 int top,
2407 FX_ARGB mask_argb,
2408 int bitmap_alpha,
2409 int blend_mode,
2410 int Transparency) {
2411 if (!pDIBitmap) {
2412 return;
2413 }
2414 if (blend_mode == FXDIB_BLEND_NORMAL) {
2415 if (!pDIBitmap->IsAlphaMask()) {
2416 if (bitmap_alpha < 255) {
2417 #ifdef _SKIA_SUPPORT_
2418 void* dummy;
2419 CFX_Matrix m(pDIBitmap->GetWidth(), 0, 0, -pDIBitmap->GetHeight(), left,
2420 top + pDIBitmap->GetHeight());
2421 m_pDevice->StartDIBits(pDIBitmap, bitmap_alpha, 0, &m, 0, dummy);
2422 return;
2423 #else
2424 pDIBitmap->MultiplyAlpha(bitmap_alpha);
2425 #endif
2426 }
2427 #ifdef _SKIA_SUPPORT_
2428 CFX_SkiaDeviceDriver::PreMultiply(pDIBitmap);
2429 #endif
2430 if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
2431 return;
2432 }
2433 } else {
2434 uint32_t fill_argb = m_Options.TranslateColor(mask_argb);
2435 if (bitmap_alpha < 255) {
2436 ((uint8_t*)&fill_argb)[3] =
2437 ((uint8_t*)&fill_argb)[3] * bitmap_alpha / 255;
2438 }
2439 if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
2440 return;
2441 }
2442 }
2443 }
2444 bool bIsolated = !!(Transparency & PDFTRANS_ISOLATED);
2445 bool bGroup = !!(Transparency & PDFTRANS_GROUP);
2446 bool bBackAlphaRequired = blend_mode && bIsolated && !m_bDropObjects;
2447 bool bGetBackGround =
2448 ((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
2449 (!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
2450 (m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
2451 if (bGetBackGround) {
2452 if (bIsolated || !bGroup) {
2453 if (pDIBitmap->IsAlphaMask()) {
2454 return;
2455 }
2456 m_pDevice->SetDIBitsWithBlend(pDIBitmap, left, top, blend_mode);
2457 } else {
2458 FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
2459 top + pDIBitmap->GetHeight());
2460 rect.Intersect(m_pDevice->GetClipBox());
2461 CFX_MaybeOwned<CFX_DIBitmap> pClone;
2462 if (m_pDevice->GetBackDrop() && m_pDevice->GetBitmap()) {
2463 pClone = m_pDevice->GetBackDrop()->Clone(&rect);
2464 CFX_DIBitmap* pForeBitmap = m_pDevice->GetBitmap();
2465 pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
2466 pForeBitmap, rect.left, rect.top);
2467 left = left >= 0 ? 0 : left;
2468 top = top >= 0 ? 0 : top;
2469 if (!pDIBitmap->IsAlphaMask())
2470 pClone->CompositeBitmap(0, 0, pClone->GetWidth(), pClone->GetHeight(),
2471 pDIBitmap, left, top, blend_mode);
2472 else
2473 pClone->CompositeMask(0, 0, pClone->GetWidth(), pClone->GetHeight(),
2474 pDIBitmap, mask_argb, left, top, blend_mode);
2475 } else {
2476 pClone = pDIBitmap;
2477 }
2478 if (m_pDevice->GetBackDrop()) {
2479 m_pDevice->SetDIBits(pClone.Get(), rect.left, rect.top);
2480 } else {
2481 if (pDIBitmap->IsAlphaMask())
2482 return;
2483 m_pDevice->SetDIBitsWithBlend(pDIBitmap, rect.left, rect.top,
2484 blend_mode);
2485 }
2486 }
2487 return;
2488 }
2489 int back_left, back_top;
2490 FX_RECT rect(left, top, left + pDIBitmap->GetWidth(),
2491 top + pDIBitmap->GetHeight());
2492 std::unique_ptr<CFX_DIBitmap> pBackdrop =
2493 GetBackdrop(m_pCurObj, rect, back_left, back_top,
2494 blend_mode > FXDIB_BLEND_NORMAL && bIsolated);
2495 if (!pBackdrop)
2496 return;
2497
2498 if (!pDIBitmap->IsAlphaMask()) {
2499 pBackdrop->CompositeBitmap(left - back_left, top - back_top,
2500 pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
2501 pDIBitmap, 0, 0, blend_mode);
2502 } else {
2503 pBackdrop->CompositeMask(left - back_left, top - back_top,
2504 pDIBitmap->GetWidth(), pDIBitmap->GetHeight(),
2505 pDIBitmap, mask_argb, 0, 0, blend_mode);
2506 }
2507
2508 auto pBackdrop1 = pdfium::MakeUnique<CFX_DIBitmap>();
2509 pBackdrop1->Create(pBackdrop->GetWidth(), pBackdrop->GetHeight(),
2510 FXDIB_Rgb32);
2511 pBackdrop1->Clear((uint32_t)-1);
2512 pBackdrop1->CompositeBitmap(0, 0, pBackdrop->GetWidth(),
2513 pBackdrop->GetHeight(), pBackdrop.get(), 0, 0);
2514 pBackdrop = std::move(pBackdrop1);
2515 m_pDevice->SetDIBits(pBackdrop.get(), back_left, back_top);
2516 }
2517
LoadSMask(CPDF_Dictionary * pSMaskDict,FX_RECT * pClipRect,const CFX_Matrix * pMatrix)2518 std::unique_ptr<CFX_DIBitmap> CPDF_RenderStatus::LoadSMask(
2519 CPDF_Dictionary* pSMaskDict,
2520 FX_RECT* pClipRect,
2521 const CFX_Matrix* pMatrix) {
2522 if (!pSMaskDict)
2523 return nullptr;
2524
2525 CPDF_Stream* pGroup = pSMaskDict->GetStreamFor("G");
2526 if (!pGroup)
2527 return nullptr;
2528
2529 std::unique_ptr<CPDF_Function> pFunc;
2530 CPDF_Object* pFuncObj = pSMaskDict->GetDirectObjectFor("TR");
2531 if (pFuncObj && (pFuncObj->IsDictionary() || pFuncObj->IsStream()))
2532 pFunc = CPDF_Function::Load(pFuncObj);
2533
2534 CFX_Matrix matrix = *pMatrix;
2535 matrix.Translate(-pClipRect->left, -pClipRect->top);
2536
2537 CPDF_Form form(m_pContext->GetDocument(), m_pContext->GetPageResources(),
2538 pGroup);
2539 form.ParseContent(nullptr, nullptr, nullptr);
2540
2541 CFX_FxgeDevice bitmap_device;
2542 bool bLuminosity = pSMaskDict->GetStringFor("S") != "Alpha";
2543 int width = pClipRect->right - pClipRect->left;
2544 int height = pClipRect->bottom - pClipRect->top;
2545 FXDIB_Format format;
2546 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || defined _SKIA_SUPPORT_ || \
2547 defined _SKIA_SUPPORT_PATHS_
2548 format = bLuminosity ? FXDIB_Rgb32 : FXDIB_8bppMask;
2549 #else
2550 format = bLuminosity ? FXDIB_Rgb : FXDIB_8bppMask;
2551 #endif
2552 if (!bitmap_device.Create(width, height, format, nullptr))
2553 return nullptr;
2554
2555 CFX_DIBitmap& bitmap = *bitmap_device.GetBitmap();
2556 int color_space_family = 0;
2557 if (bLuminosity) {
2558 CPDF_Array* pBC = pSMaskDict->GetArrayFor("BC");
2559 FX_ARGB back_color = 0xff000000;
2560 if (pBC) {
2561 CPDF_Object* pCSObj = nullptr;
2562 CPDF_Dictionary* pDict = pGroup->GetDict();
2563 if (pDict && pDict->GetDictFor("Group")) {
2564 pCSObj = pDict->GetDictFor("Group")->GetDirectObjectFor("CS");
2565 }
2566 const CPDF_ColorSpace* pCS =
2567 m_pContext->GetDocument()->LoadColorSpace(pCSObj);
2568 if (pCS) {
2569 // Store Color Space Family to use in CPDF_RenderStatus::Initialize.
2570 color_space_family = pCS->GetFamily();
2571
2572 FX_FLOAT R, G, B;
2573 uint32_t comps = 8;
2574 if (pCS->CountComponents() > comps) {
2575 comps = pCS->CountComponents();
2576 }
2577 CFX_FixedBufGrow<FX_FLOAT, 8> float_array(comps);
2578 FX_FLOAT* pFloats = float_array;
2579 FX_SAFE_UINT32 num_floats = comps;
2580 num_floats *= sizeof(FX_FLOAT);
2581 if (!num_floats.IsValid()) {
2582 return nullptr;
2583 }
2584 FXSYS_memset(pFloats, 0, num_floats.ValueOrDie());
2585 size_t count = pBC->GetCount() > 8 ? 8 : pBC->GetCount();
2586 for (size_t i = 0; i < count; i++) {
2587 pFloats[i] = pBC->GetNumberAt(i);
2588 }
2589 pCS->GetRGB(pFloats, R, G, B);
2590 back_color = 0xff000000 | ((int32_t)(R * 255) << 16) |
2591 ((int32_t)(G * 255) << 8) | (int32_t)(B * 255);
2592 m_pContext->GetDocument()->GetPageData()->ReleaseColorSpace(pCSObj);
2593 }
2594 }
2595 bitmap.Clear(back_color);
2596 } else {
2597 bitmap.Clear(0);
2598 }
2599 CPDF_Dictionary* pFormResource = nullptr;
2600 if (form.m_pFormDict) {
2601 pFormResource = form.m_pFormDict->GetDictFor("Resources");
2602 }
2603 CPDF_RenderOptions options;
2604 options.m_ColorMode = bLuminosity ? RENDER_COLOR_NORMAL : RENDER_COLOR_ALPHA;
2605 CPDF_RenderStatus status;
2606 status.Initialize(m_pContext, &bitmap_device, nullptr, nullptr, nullptr,
2607 nullptr, &options, 0, m_bDropObjects, pFormResource, true,
2608 nullptr, 0, color_space_family, bLuminosity);
2609 status.RenderObjectList(&form, &matrix);
2610
2611 auto pMask = pdfium::MakeUnique<CFX_DIBitmap>();
2612 if (!pMask->Create(width, height, FXDIB_8bppMask))
2613 return nullptr;
2614
2615 uint8_t* dest_buf = pMask->GetBuffer();
2616 int dest_pitch = pMask->GetPitch();
2617 uint8_t* src_buf = bitmap.GetBuffer();
2618 int src_pitch = bitmap.GetPitch();
2619 std::vector<uint8_t> transfers(256);
2620 if (pFunc) {
2621 CFX_FixedBufGrow<FX_FLOAT, 16> results(pFunc->CountOutputs());
2622 for (int i = 0; i < 256; i++) {
2623 FX_FLOAT input = (FX_FLOAT)i / 255.0f;
2624 int nresult;
2625 pFunc->Call(&input, 1, results, nresult);
2626 transfers[i] = FXSYS_round(results[0] * 255);
2627 }
2628 } else {
2629 for (int i = 0; i < 256; i++) {
2630 transfers[i] = i;
2631 }
2632 }
2633 if (bLuminosity) {
2634 int Bpp = bitmap.GetBPP() / 8;
2635 for (int row = 0; row < height; row++) {
2636 uint8_t* dest_pos = dest_buf + row * dest_pitch;
2637 uint8_t* src_pos = src_buf + row * src_pitch;
2638 for (int col = 0; col < width; col++) {
2639 *dest_pos++ = transfers[FXRGB2GRAY(src_pos[2], src_pos[1], *src_pos)];
2640 src_pos += Bpp;
2641 }
2642 }
2643 } else if (pFunc) {
2644 int size = dest_pitch * height;
2645 for (int i = 0; i < size; i++) {
2646 dest_buf[i] = transfers[src_buf[i]];
2647 }
2648 } else {
2649 FXSYS_memcpy(dest_buf, src_buf, dest_pitch * height);
2650 }
2651 return pMask;
2652 }
2653