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1 /*
2  * Copyright 2014 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 
8 #include "include/core/SkCanvas.h"
9 #include "include/core/SkData.h"
10 #include "include/core/SkImage.h"
11 #include "include/core/SkMaskFilter.h"
12 #include "include/core/SkMatrix.h"
13 #include "include/core/SkPaint.h"
14 #include "include/core/SkPath.h"
15 #include "include/core/SkPictureRecorder.h"
16 #include "include/core/SkSurface.h"
17 
18 #include "include/c/sk_canvas.h"
19 #include "include/c/sk_data.h"
20 #include "include/c/sk_image.h"
21 #include "include/c/sk_paint.h"
22 #include "include/c/sk_path.h"
23 #include "include/c/sk_picture.h"
24 #include "include/c/sk_surface.h"
25 #include "src/c/sk_types_priv.h"
26 
27 const struct {
28     sk_pixelgeometry_t fC;
29     SkPixelGeometry    fSK;
30 } gPixelGeometryMap[] = {
31     { UNKNOWN_SK_PIXELGEOMETRY, kUnknown_SkPixelGeometry },
32     { RGB_H_SK_PIXELGEOMETRY,   kRGB_H_SkPixelGeometry   },
33     { BGR_H_SK_PIXELGEOMETRY,   kBGR_H_SkPixelGeometry   },
34     { RGB_V_SK_PIXELGEOMETRY,   kRGB_V_SkPixelGeometry   },
35     { BGR_V_SK_PIXELGEOMETRY,   kBGR_V_SkPixelGeometry   },
36 };
37 
38 
from_c_pixelgeometry(sk_pixelgeometry_t cGeom,SkPixelGeometry * skGeom)39 static bool from_c_pixelgeometry(sk_pixelgeometry_t cGeom, SkPixelGeometry* skGeom) {
40     for (size_t i = 0; i < SK_ARRAY_COUNT(gPixelGeometryMap); ++i) {
41         if (gPixelGeometryMap[i].fC == cGeom) {
42             if (skGeom) {
43                 *skGeom = gPixelGeometryMap[i].fSK;
44             }
45             return true;
46         }
47     }
48     return false;
49 }
50 
from_c_matrix(const sk_matrix_t * cmatrix,SkMatrix * matrix)51 static void from_c_matrix(const sk_matrix_t* cmatrix, SkMatrix* matrix) {
52     matrix->setAll(cmatrix->mat[0], cmatrix->mat[1], cmatrix->mat[2],
53                    cmatrix->mat[3], cmatrix->mat[4], cmatrix->mat[5],
54                    cmatrix->mat[6], cmatrix->mat[7], cmatrix->mat[8]);
55 }
56 
57 const struct {
58     sk_path_direction_t fC;
59     SkPath::Direction   fSk;
60 } gPathDirMap[] = {
61     { CW_SK_PATH_DIRECTION,  SkPath::kCW_Direction },
62     { CCW_SK_PATH_DIRECTION, SkPath::kCCW_Direction },
63 };
64 
from_c_path_direction(sk_path_direction_t cdir,SkPath::Direction * dir)65 static bool from_c_path_direction(sk_path_direction_t cdir, SkPath::Direction* dir) {
66     for (size_t i = 0; i < SK_ARRAY_COUNT(gPathDirMap); ++i) {
67         if (gPathDirMap[i].fC == cdir) {
68             if (dir) {
69                 *dir = gPathDirMap[i].fSk;
70             }
71             return true;
72         }
73     }
74     return false;
75 }
76 
AsData(const sk_data_t * cdata)77 static SkData* AsData(const sk_data_t* cdata) {
78     return reinterpret_cast<SkData*>(const_cast<sk_data_t*>(cdata));
79 }
80 
ToData(SkData * data)81 static sk_data_t* ToData(SkData* data) {
82     return reinterpret_cast<sk_data_t*>(data);
83 }
84 
ToRect(const SkRect & rect)85 static sk_rect_t ToRect(const SkRect& rect) {
86     return reinterpret_cast<const sk_rect_t&>(rect);
87 }
88 
AsRect(const sk_rect_t & crect)89 static const SkRect& AsRect(const sk_rect_t& crect) {
90     return reinterpret_cast<const SkRect&>(crect);
91 }
92 
AsPath(const sk_path_t & cpath)93 static const SkPath& AsPath(const sk_path_t& cpath) {
94     return reinterpret_cast<const SkPath&>(cpath);
95 }
96 
as_path(sk_path_t * cpath)97 static SkPath* as_path(sk_path_t* cpath) {
98     return reinterpret_cast<SkPath*>(cpath);
99 }
100 
AsImage(const sk_image_t * cimage)101 static const SkImage* AsImage(const sk_image_t* cimage) {
102     return reinterpret_cast<const SkImage*>(cimage);
103 }
104 
ToImage(SkImage * cimage)105 static sk_image_t* ToImage(SkImage* cimage) {
106     return reinterpret_cast<sk_image_t*>(cimage);
107 }
108 
ToCanvas(SkCanvas * canvas)109 static sk_canvas_t* ToCanvas(SkCanvas* canvas) {
110     return reinterpret_cast<sk_canvas_t*>(canvas);
111 }
112 
AsCanvas(sk_canvas_t * ccanvas)113 static SkCanvas* AsCanvas(sk_canvas_t* ccanvas) {
114     return reinterpret_cast<SkCanvas*>(ccanvas);
115 }
116 
AsPictureRecorder(sk_picture_recorder_t * crec)117 static SkPictureRecorder* AsPictureRecorder(sk_picture_recorder_t* crec) {
118     return reinterpret_cast<SkPictureRecorder*>(crec);
119 }
120 
ToPictureRecorder(SkPictureRecorder * rec)121 static sk_picture_recorder_t* ToPictureRecorder(SkPictureRecorder* rec) {
122     return reinterpret_cast<sk_picture_recorder_t*>(rec);
123 }
124 
AsPicture(const sk_picture_t * cpic)125 static const SkPicture* AsPicture(const sk_picture_t* cpic) {
126     return reinterpret_cast<const SkPicture*>(cpic);
127 }
128 
AsPicture(sk_picture_t * cpic)129 static SkPicture* AsPicture(sk_picture_t* cpic) {
130     return reinterpret_cast<SkPicture*>(cpic);
131 }
132 
ToPicture(SkPicture * pic)133 static sk_picture_t* ToPicture(SkPicture* pic) {
134     return reinterpret_cast<sk_picture_t*>(pic);
135 }
136 
137 ///////////////////////////////////////////////////////////////////////////////////////////
138 
sk_image_new_raster_copy(const sk_imageinfo_t * cinfo,const void * pixels,size_t rowBytes)139 sk_image_t* sk_image_new_raster_copy(const sk_imageinfo_t* cinfo, const void* pixels,
140                                      size_t rowBytes) {
141     const SkImageInfo* info = reinterpret_cast<const SkImageInfo*>(cinfo);
142     return (sk_image_t*)SkImage::MakeRasterCopy(SkPixmap(*info, pixels, rowBytes)).release();
143 }
144 
sk_image_new_from_encoded(const sk_data_t * cdata,const sk_irect_t * subset)145 sk_image_t* sk_image_new_from_encoded(const sk_data_t* cdata, const sk_irect_t* subset) {
146     return ToImage(SkImage::MakeFromEncoded(sk_ref_sp(AsData(cdata)),
147                                            reinterpret_cast<const SkIRect*>(subset)).release());
148 }
149 
sk_image_encode(const sk_image_t * cimage)150 sk_data_t* sk_image_encode(const sk_image_t* cimage) {
151     return ToData(AsImage(cimage)->encodeToData().release());
152 }
153 
sk_image_ref(const sk_image_t * cimage)154 void sk_image_ref(const sk_image_t* cimage) {
155     AsImage(cimage)->ref();
156 }
157 
sk_image_unref(const sk_image_t * cimage)158 void sk_image_unref(const sk_image_t* cimage) {
159     AsImage(cimage)->unref();
160 }
161 
sk_image_get_width(const sk_image_t * cimage)162 int sk_image_get_width(const sk_image_t* cimage) {
163     return AsImage(cimage)->width();
164 }
165 
sk_image_get_height(const sk_image_t * cimage)166 int sk_image_get_height(const sk_image_t* cimage) {
167     return AsImage(cimage)->height();
168 }
169 
sk_image_get_unique_id(const sk_image_t * cimage)170 uint32_t sk_image_get_unique_id(const sk_image_t* cimage) {
171     return AsImage(cimage)->uniqueID();
172 }
173 
174 ///////////////////////////////////////////////////////////////////////////////////////////
175 
sk_path_new()176 sk_path_t* sk_path_new() { return (sk_path_t*)new SkPath; }
177 
sk_path_delete(sk_path_t * cpath)178 void sk_path_delete(sk_path_t* cpath) { delete as_path(cpath); }
179 
sk_path_move_to(sk_path_t * cpath,float x,float y)180 void sk_path_move_to(sk_path_t* cpath, float x, float y) {
181     as_path(cpath)->moveTo(x, y);
182 }
183 
sk_path_line_to(sk_path_t * cpath,float x,float y)184 void sk_path_line_to(sk_path_t* cpath, float x, float y) {
185     as_path(cpath)->lineTo(x, y);
186 }
187 
sk_path_quad_to(sk_path_t * cpath,float x0,float y0,float x1,float y1)188 void sk_path_quad_to(sk_path_t* cpath, float x0, float y0, float x1, float y1) {
189     as_path(cpath)->quadTo(x0, y0, x1, y1);
190 }
191 
sk_path_conic_to(sk_path_t * cpath,float x0,float y0,float x1,float y1,float w)192 void sk_path_conic_to(sk_path_t* cpath, float x0, float y0, float x1, float y1, float w) {
193     as_path(cpath)->conicTo(x0, y0, x1, y1, w);
194 }
195 
sk_path_cubic_to(sk_path_t * cpath,float x0,float y0,float x1,float y1,float x2,float y2)196 void sk_path_cubic_to(sk_path_t* cpath, float x0, float y0, float x1, float y1, float x2, float y2) {
197     as_path(cpath)->cubicTo(x0, y0, x1, y1, x2, y2);
198 }
199 
sk_path_close(sk_path_t * cpath)200 void sk_path_close(sk_path_t* cpath) {
201     as_path(cpath)->close();
202 }
203 
sk_path_add_rect(sk_path_t * cpath,const sk_rect_t * crect,sk_path_direction_t cdir)204 void sk_path_add_rect(sk_path_t* cpath, const sk_rect_t* crect, sk_path_direction_t cdir) {
205     SkPath::Direction dir;
206     if (!from_c_path_direction(cdir, &dir)) {
207         return;
208     }
209     as_path(cpath)->addRect(AsRect(*crect), dir);
210 }
211 
sk_path_add_oval(sk_path_t * cpath,const sk_rect_t * crect,sk_path_direction_t cdir)212 void sk_path_add_oval(sk_path_t* cpath, const sk_rect_t* crect, sk_path_direction_t cdir) {
213     SkPath::Direction dir;
214     if (!from_c_path_direction(cdir, &dir)) {
215         return;
216     }
217     as_path(cpath)->addOval(AsRect(*crect), dir);
218 }
219 
sk_path_get_bounds(const sk_path_t * cpath,sk_rect_t * crect)220 bool sk_path_get_bounds(const sk_path_t* cpath, sk_rect_t* crect) {
221     const SkPath& path = AsPath(*cpath);
222 
223     if (path.isEmpty()) {
224         if (crect) {
225             *crect = ToRect(SkRect::MakeEmpty());
226         }
227         return false;
228     }
229 
230     if (crect) {
231         *crect = ToRect(path.getBounds());
232     }
233     return true;
234 }
235 
236 ///////////////////////////////////////////////////////////////////////////////////////////
237 
sk_canvas_save(sk_canvas_t * ccanvas)238 void sk_canvas_save(sk_canvas_t* ccanvas) {
239     AsCanvas(ccanvas)->save();
240 }
241 
sk_canvas_save_layer(sk_canvas_t * ccanvas,const sk_rect_t * crect,const sk_paint_t * cpaint)242 void sk_canvas_save_layer(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
243     AsCanvas(ccanvas)->drawRect(AsRect(*crect), AsPaint(*cpaint));
244 }
245 
sk_canvas_restore(sk_canvas_t * ccanvas)246 void sk_canvas_restore(sk_canvas_t* ccanvas) {
247     AsCanvas(ccanvas)->restore();
248 }
249 
sk_canvas_translate(sk_canvas_t * ccanvas,float dx,float dy)250 void sk_canvas_translate(sk_canvas_t* ccanvas, float dx, float dy) {
251     AsCanvas(ccanvas)->translate(dx, dy);
252 }
253 
sk_canvas_scale(sk_canvas_t * ccanvas,float sx,float sy)254 void sk_canvas_scale(sk_canvas_t* ccanvas, float sx, float sy) {
255     AsCanvas(ccanvas)->scale(sx, sy);
256 }
257 
sk_canvas_rotate_degress(sk_canvas_t * ccanvas,float degrees)258 void sk_canvas_rotate_degress(sk_canvas_t* ccanvas, float degrees) {
259     AsCanvas(ccanvas)->rotate(degrees);
260 }
261 
sk_canvas_rotate_radians(sk_canvas_t * ccanvas,float radians)262 void sk_canvas_rotate_radians(sk_canvas_t* ccanvas, float radians) {
263     AsCanvas(ccanvas)->rotate(SkRadiansToDegrees(radians));
264 }
265 
sk_canvas_skew(sk_canvas_t * ccanvas,float sx,float sy)266 void sk_canvas_skew(sk_canvas_t* ccanvas, float sx, float sy) {
267     AsCanvas(ccanvas)->skew(sx, sy);
268 }
269 
sk_canvas_concat(sk_canvas_t * ccanvas,const sk_matrix_t * cmatrix)270 void sk_canvas_concat(sk_canvas_t* ccanvas, const sk_matrix_t* cmatrix) {
271     SkASSERT(cmatrix);
272     SkMatrix matrix;
273     from_c_matrix(cmatrix, &matrix);
274     AsCanvas(ccanvas)->concat(matrix);
275 }
276 
sk_canvas_clip_rect(sk_canvas_t * ccanvas,const sk_rect_t * crect)277 void sk_canvas_clip_rect(sk_canvas_t* ccanvas, const sk_rect_t* crect) {
278     AsCanvas(ccanvas)->clipRect(AsRect(*crect));
279 }
280 
sk_canvas_clip_path(sk_canvas_t * ccanvas,const sk_path_t * cpath)281 void sk_canvas_clip_path(sk_canvas_t* ccanvas, const sk_path_t* cpath) {
282     AsCanvas(ccanvas)->clipPath(AsPath(*cpath));
283 }
284 
sk_canvas_draw_paint(sk_canvas_t * ccanvas,const sk_paint_t * cpaint)285 void sk_canvas_draw_paint(sk_canvas_t* ccanvas, const sk_paint_t* cpaint) {
286     AsCanvas(ccanvas)->drawPaint(AsPaint(*cpaint));
287 }
288 
sk_canvas_draw_rect(sk_canvas_t * ccanvas,const sk_rect_t * crect,const sk_paint_t * cpaint)289 void sk_canvas_draw_rect(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
290     AsCanvas(ccanvas)->drawRect(AsRect(*crect), AsPaint(*cpaint));
291 }
292 
sk_canvas_draw_circle(sk_canvas_t * ccanvas,float cx,float cy,float rad,const sk_paint_t * cpaint)293 void sk_canvas_draw_circle(sk_canvas_t* ccanvas, float cx, float cy, float rad,
294                            const sk_paint_t* cpaint) {
295     AsCanvas(ccanvas)->drawCircle(cx, cy, rad, AsPaint(*cpaint));
296 }
297 
sk_canvas_draw_oval(sk_canvas_t * ccanvas,const sk_rect_t * crect,const sk_paint_t * cpaint)298 void sk_canvas_draw_oval(sk_canvas_t* ccanvas, const sk_rect_t* crect, const sk_paint_t* cpaint) {
299     AsCanvas(ccanvas)->drawOval(AsRect(*crect), AsPaint(*cpaint));
300 }
301 
sk_canvas_draw_path(sk_canvas_t * ccanvas,const sk_path_t * cpath,const sk_paint_t * cpaint)302 void sk_canvas_draw_path(sk_canvas_t* ccanvas, const sk_path_t* cpath, const sk_paint_t* cpaint) {
303     AsCanvas(ccanvas)->drawPath(AsPath(*cpath), AsPaint(*cpaint));
304 }
305 
sk_canvas_draw_image(sk_canvas_t * ccanvas,const sk_image_t * cimage,float x,float y,const sk_paint_t * cpaint)306 void sk_canvas_draw_image(sk_canvas_t* ccanvas, const sk_image_t* cimage, float x, float y,
307                           const sk_paint_t* cpaint) {
308     AsCanvas(ccanvas)->drawImage(AsImage(cimage), x, y, AsPaint(cpaint));
309 }
310 
sk_canvas_draw_image_rect(sk_canvas_t * ccanvas,const sk_image_t * cimage,const sk_rect_t * csrcR,const sk_rect_t * cdstR,const sk_paint_t * cpaint)311 void sk_canvas_draw_image_rect(sk_canvas_t* ccanvas, const sk_image_t* cimage,
312                                const sk_rect_t* csrcR, const sk_rect_t* cdstR,
313                                const sk_paint_t* cpaint) {
314     SkCanvas* canvas = AsCanvas(ccanvas);
315     const SkImage* image = AsImage(cimage);
316     const SkRect& dst = AsRect(*cdstR);
317     const SkPaint* paint = AsPaint(cpaint);
318 
319     if (csrcR) {
320         canvas->drawImageRect(image, AsRect(*csrcR), dst, paint);
321     } else {
322         canvas->drawImageRect(image, dst, paint);
323     }
324 }
325 
sk_canvas_draw_picture(sk_canvas_t * ccanvas,const sk_picture_t * cpicture,const sk_matrix_t * cmatrix,const sk_paint_t * cpaint)326 void sk_canvas_draw_picture(sk_canvas_t* ccanvas, const sk_picture_t* cpicture,
327                             const sk_matrix_t* cmatrix, const sk_paint_t* cpaint) {
328     const SkMatrix* matrixPtr = NULL;
329     SkMatrix matrix;
330     if (cmatrix) {
331         from_c_matrix(cmatrix, &matrix);
332         matrixPtr = &matrix;
333     }
334     AsCanvas(ccanvas)->drawPicture(AsPicture(cpicture), matrixPtr, AsPaint(cpaint));
335 }
336 
337 ///////////////////////////////////////////////////////////////////////////////////////////
338 
sk_surface_new_raster(const sk_imageinfo_t * cinfo,const sk_surfaceprops_t * props)339 sk_surface_t* sk_surface_new_raster(const sk_imageinfo_t* cinfo,
340                                     const sk_surfaceprops_t* props) {
341     const SkImageInfo* info = reinterpret_cast<const SkImageInfo*>(cinfo);
342     SkPixelGeometry geo = kUnknown_SkPixelGeometry;
343     if (props && !from_c_pixelgeometry(props->pixelGeometry, &geo)) {
344         return NULL;
345     }
346 
347     SkSurfaceProps surfProps(0, geo);
348     return (sk_surface_t*)SkSurface::MakeRaster(*info, &surfProps).release();
349 }
350 
sk_surface_new_raster_direct(const sk_imageinfo_t * cinfo,void * pixels,size_t rowBytes,const sk_surfaceprops_t * props)351 sk_surface_t* sk_surface_new_raster_direct(const sk_imageinfo_t* cinfo, void* pixels,
352                                            size_t rowBytes,
353                                            const sk_surfaceprops_t* props) {
354     const SkImageInfo* info = reinterpret_cast<const SkImageInfo*>(cinfo);
355     SkPixelGeometry geo = kUnknown_SkPixelGeometry;
356     if (props && !from_c_pixelgeometry(props->pixelGeometry, &geo)) {
357         return NULL;
358     }
359 
360     SkSurfaceProps surfProps(0, geo);
361     return (sk_surface_t*)SkSurface::MakeRasterDirect(*info, pixels, rowBytes, &surfProps).release();
362 }
363 
sk_surface_unref(sk_surface_t * csurf)364 void sk_surface_unref(sk_surface_t* csurf) {
365     SkSafeUnref((SkSurface*)csurf);
366 }
367 
sk_surface_get_canvas(sk_surface_t * csurf)368 sk_canvas_t* sk_surface_get_canvas(sk_surface_t* csurf) {
369     SkSurface* surf = (SkSurface*)csurf;
370     return (sk_canvas_t*)surf->getCanvas();
371 }
372 
sk_surface_new_image_snapshot(sk_surface_t * csurf)373 sk_image_t* sk_surface_new_image_snapshot(sk_surface_t* csurf) {
374     SkSurface* surf = (SkSurface*)csurf;
375     return (sk_image_t*)surf->makeImageSnapshot().release();
376 }
377 
378 ///////////////////////////////////////////////////////////////////////////////////////////
379 
sk_picture_recorder_new()380 sk_picture_recorder_t* sk_picture_recorder_new() {
381     return ToPictureRecorder(new SkPictureRecorder);
382 }
383 
sk_picture_recorder_delete(sk_picture_recorder_t * crec)384 void sk_picture_recorder_delete(sk_picture_recorder_t* crec) {
385     delete AsPictureRecorder(crec);
386 }
387 
sk_picture_recorder_begin_recording(sk_picture_recorder_t * crec,const sk_rect_t * cbounds)388 sk_canvas_t* sk_picture_recorder_begin_recording(sk_picture_recorder_t* crec,
389                                                  const sk_rect_t* cbounds) {
390     return ToCanvas(AsPictureRecorder(crec)->beginRecording(AsRect(*cbounds)));
391 }
392 
sk_picture_recorder_end_recording(sk_picture_recorder_t * crec)393 sk_picture_t* sk_picture_recorder_end_recording(sk_picture_recorder_t* crec) {
394     return ToPicture(AsPictureRecorder(crec)->finishRecordingAsPicture().release());
395 }
396 
sk_picture_ref(sk_picture_t * cpic)397 void sk_picture_ref(sk_picture_t* cpic) {
398     SkSafeRef(AsPicture(cpic));
399 }
400 
sk_picture_unref(sk_picture_t * cpic)401 void sk_picture_unref(sk_picture_t* cpic) {
402     SkSafeUnref(AsPicture(cpic));
403 }
404 
sk_picture_get_unique_id(sk_picture_t * cpic)405 uint32_t sk_picture_get_unique_id(sk_picture_t* cpic) {
406     return AsPicture(cpic)->uniqueID();
407 }
408 
sk_picture_get_bounds(sk_picture_t * cpic)409 sk_rect_t sk_picture_get_bounds(sk_picture_t* cpic) {
410     return ToRect(AsPicture(cpic)->cullRect());
411 }
412 
413 ///////////////////////////////////////////////////////////////////////////////////////////
414 
sk_data_new_with_copy(const void * src,size_t length)415 sk_data_t* sk_data_new_with_copy(const void* src, size_t length) {
416     return ToData(SkData::MakeWithCopy(src, length).release());
417 }
418 
sk_data_new_from_malloc(const void * memory,size_t length)419 sk_data_t* sk_data_new_from_malloc(const void* memory, size_t length) {
420     return ToData(SkData::MakeFromMalloc(memory, length).release());
421 }
422 
sk_data_new_subset(const sk_data_t * csrc,size_t offset,size_t length)423 sk_data_t* sk_data_new_subset(const sk_data_t* csrc, size_t offset, size_t length) {
424     return ToData(SkData::MakeSubset(AsData(csrc), offset, length).release());
425 }
426 
sk_data_ref(const sk_data_t * cdata)427 void sk_data_ref(const sk_data_t* cdata) {
428     SkSafeRef(AsData(cdata));
429 }
430 
sk_data_unref(const sk_data_t * cdata)431 void sk_data_unref(const sk_data_t* cdata) {
432     SkSafeUnref(AsData(cdata));
433 }
434 
sk_data_get_size(const sk_data_t * cdata)435 size_t sk_data_get_size(const sk_data_t* cdata) {
436     return AsData(cdata)->size();
437 }
438 
sk_data_get_data(const sk_data_t * cdata)439 const void* sk_data_get_data(const sk_data_t* cdata) {
440     return AsData(cdata)->data();
441 }
442 
443 ///////////////////////////////////////////////////////////////////////////////////////////
444