1 /**************************************************************************
2 *
3 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portionsalloc
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "main/glheader.h"
29 #include "main/enums.h"
30 #include "main/image.h"
31 #include "main/colormac.h"
32 #include "main/condrender.h"
33 #include "main/mtypes.h"
34 #include "main/macros.h"
35 #include "main/pbo.h"
36 #include "main/bufferobj.h"
37 #include "main/state.h"
38 #include "main/texobj.h"
39 #include "main/context.h"
40 #include "main/fbobject.h"
41 #include "swrast/swrast.h"
42 #include "drivers/common/meta.h"
43
44 #include "intel_screen.h"
45 #include "intel_context.h"
46 #include "intel_batchbuffer.h"
47 #include "intel_blit.h"
48 #include "intel_regions.h"
49 #include "intel_buffers.h"
50 #include "intel_pixel.h"
51 #include "intel_reg.h"
52
53
54 #define FILE_DEBUG_FLAG DEBUG_PIXEL
55
56
57 /* Unlike the other intel_pixel_* functions, the expectation here is
58 * that the incoming data is not in a PBO. With the XY_TEXT blit
59 * method, there's no benefit haveing it in a PBO, but we could
60 * implement a path based on XY_MONO_SRC_COPY_BLIT which might benefit
61 * PBO bitmaps. I think they are probably pretty rare though - I
62 * wonder if Xgl uses them?
63 */
map_pbo(struct gl_context * ctx,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap)64 static const GLubyte *map_pbo( struct gl_context *ctx,
65 GLsizei width, GLsizei height,
66 const struct gl_pixelstore_attrib *unpack,
67 const GLubyte *bitmap )
68 {
69 GLubyte *buf;
70
71 if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
72 GL_COLOR_INDEX, GL_BITMAP,
73 INT_MAX, (const GLvoid *) bitmap)) {
74 _mesa_error(ctx, GL_INVALID_OPERATION,"glBitmap(invalid PBO access)");
75 return NULL;
76 }
77
78 buf = (GLubyte *) ctx->Driver.MapBufferRange(ctx, 0, unpack->BufferObj->Size,
79 GL_MAP_READ_BIT,
80 unpack->BufferObj);
81 if (!buf) {
82 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap(PBO is mapped)");
83 return NULL;
84 }
85
86 return ADD_POINTERS(buf, bitmap);
87 }
88
test_bit(const GLubyte * src,GLuint bit)89 static bool test_bit( const GLubyte *src, GLuint bit )
90 {
91 return (src[bit/8] & (1<<(bit % 8))) ? 1 : 0;
92 }
93
set_bit(GLubyte * dest,GLuint bit)94 static void set_bit( GLubyte *dest, GLuint bit )
95 {
96 dest[bit/8] |= 1 << (bit % 8);
97 }
98
99 /* Extract a rectangle's worth of data from the bitmap. Called
100 * per chunk of HW-sized bitmap.
101 */
get_bitmap_rect(GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap,GLuint x,GLuint y,GLuint w,GLuint h,GLubyte * dest,GLuint row_align,bool invert)102 static GLuint get_bitmap_rect(GLsizei width, GLsizei height,
103 const struct gl_pixelstore_attrib *unpack,
104 const GLubyte *bitmap,
105 GLuint x, GLuint y,
106 GLuint w, GLuint h,
107 GLubyte *dest,
108 GLuint row_align,
109 bool invert)
110 {
111 GLuint src_offset = (x + unpack->SkipPixels) & 0x7;
112 GLuint mask = unpack->LsbFirst ? 0 : 7;
113 GLuint bit = 0;
114 GLint row, col;
115 GLint first, last;
116 GLint incr;
117 GLuint count = 0;
118
119 DBG("%s %d,%d %dx%d bitmap %dx%d skip %d src_offset %d mask %d\n",
120 __FUNCTION__, x,y,w,h,width,height,unpack->SkipPixels, src_offset, mask);
121
122 if (invert) {
123 first = h-1;
124 last = 0;
125 incr = -1;
126 }
127 else {
128 first = 0;
129 last = h-1;
130 incr = 1;
131 }
132
133 /* Require that dest be pre-zero'd.
134 */
135 for (row = first; row != (last+incr); row += incr) {
136 const GLubyte *rowsrc = _mesa_image_address2d(unpack, bitmap,
137 width, height,
138 GL_COLOR_INDEX, GL_BITMAP,
139 y + row, x);
140
141 for (col = 0; col < w; col++, bit++) {
142 if (test_bit(rowsrc, (col + src_offset) ^ mask)) {
143 set_bit(dest, bit ^ 7);
144 count++;
145 }
146 }
147
148 if (row_align)
149 bit = ALIGN(bit, row_align);
150 }
151
152 return count;
153 }
154
155 /**
156 * Returns the low Y value of the vertical range given, flipped according to
157 * whether the framebuffer is or not.
158 */
159 static INLINE int
y_flip(struct gl_framebuffer * fb,int y,int height)160 y_flip(struct gl_framebuffer *fb, int y, int height)
161 {
162 if (_mesa_is_user_fbo(fb))
163 return y;
164 else
165 return fb->Height - y - height;
166 }
167
168 /*
169 * Render a bitmap.
170 */
171 static bool
do_blit_bitmap(struct gl_context * ctx,GLint dstx,GLint dsty,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * bitmap)172 do_blit_bitmap( struct gl_context *ctx,
173 GLint dstx, GLint dsty,
174 GLsizei width, GLsizei height,
175 const struct gl_pixelstore_attrib *unpack,
176 const GLubyte *bitmap )
177 {
178 struct intel_context *intel = intel_context(ctx);
179 struct intel_region *dst;
180 struct gl_framebuffer *fb = ctx->DrawBuffer;
181 GLfloat tmpColor[4];
182 GLubyte ubcolor[4];
183 GLuint color;
184 GLsizei bitmap_width = width;
185 GLsizei bitmap_height = height;
186 GLint px, py;
187 GLuint stipple[32];
188 GLint orig_dstx = dstx;
189 GLint orig_dsty = dsty;
190
191 /* Update draw buffer bounds */
192 _mesa_update_state(ctx);
193
194 if (ctx->Depth.Test) {
195 /* The blit path produces incorrect results when depth testing is on.
196 * It seems the blit Z coord is always 1.0 (the far plane) so fragments
197 * will likely be obscured by other, closer geometry.
198 */
199 return false;
200 }
201
202 intel_prepare_render(intel);
203 dst = intel_drawbuf_region(intel);
204
205 if (!dst)
206 return false;
207
208 if (_mesa_is_bufferobj(unpack->BufferObj)) {
209 bitmap = map_pbo(ctx, width, height, unpack, bitmap);
210 if (bitmap == NULL)
211 return true; /* even though this is an error, we're done */
212 }
213
214 COPY_4V(tmpColor, ctx->Current.RasterColor);
215
216 if (_mesa_need_secondary_color(ctx)) {
217 ADD_3V(tmpColor, tmpColor, ctx->Current.RasterSecondaryColor);
218 }
219
220 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[0], tmpColor[0]);
221 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[1], tmpColor[1]);
222 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[2], tmpColor[2]);
223 UNCLAMPED_FLOAT_TO_UBYTE(ubcolor[3], tmpColor[3]);
224
225 if (dst->cpp == 2)
226 color = PACK_COLOR_565(ubcolor[0], ubcolor[1], ubcolor[2]);
227 else
228 color = PACK_COLOR_8888(ubcolor[3], ubcolor[0], ubcolor[1], ubcolor[2]);
229
230 if (!intel_check_blit_fragment_ops(ctx, tmpColor[3] == 1.0F))
231 return false;
232
233 /* Clip to buffer bounds and scissor. */
234 if (!_mesa_clip_to_region(fb->_Xmin, fb->_Ymin,
235 fb->_Xmax, fb->_Ymax,
236 &dstx, &dsty, &width, &height))
237 goto out;
238
239 dsty = y_flip(fb, dsty, height);
240
241 #define DY 32
242 #define DX 32
243
244 /* Chop it all into chunks that can be digested by hardware: */
245 for (py = 0; py < height; py += DY) {
246 for (px = 0; px < width; px += DX) {
247 int h = MIN2(DY, height - py);
248 int w = MIN2(DX, width - px);
249 GLuint sz = ALIGN(ALIGN(w,8) * h, 64)/8;
250 GLenum logic_op = ctx->Color.ColorLogicOpEnabled ?
251 ctx->Color.LogicOp : GL_COPY;
252
253 assert(sz <= sizeof(stipple));
254 memset(stipple, 0, sz);
255
256 /* May need to adjust this when padding has been introduced in
257 * sz above:
258 *
259 * Have to translate destination coordinates back into source
260 * coordinates.
261 */
262 if (get_bitmap_rect(bitmap_width, bitmap_height, unpack,
263 bitmap,
264 -orig_dstx + (dstx + px),
265 -orig_dsty + y_flip(fb, dsty + py, h),
266 w, h,
267 (GLubyte *)stipple,
268 8,
269 _mesa_is_winsys_fbo(fb)) == 0)
270 continue;
271
272 if (!intelEmitImmediateColorExpandBlit(intel,
273 dst->cpp,
274 (GLubyte *)stipple,
275 sz,
276 color,
277 dst->pitch,
278 dst->bo,
279 0,
280 dst->tiling,
281 dstx + px,
282 dsty + py,
283 w, h,
284 logic_op)) {
285 return false;
286 }
287 }
288 }
289 out:
290
291 if (unlikely(INTEL_DEBUG & DEBUG_SYNC))
292 intel_batchbuffer_flush(intel);
293
294 if (_mesa_is_bufferobj(unpack->BufferObj)) {
295 /* done with PBO so unmap it now */
296 ctx->Driver.UnmapBuffer(ctx, unpack->BufferObj);
297 }
298
299 intel_check_front_buffer_rendering(intel);
300
301 return true;
302 }
303
304
305 /* There are a large number of possible ways to implement bitmap on
306 * this hardware, most of them have some sort of drawback. Here are a
307 * few that spring to mind:
308 *
309 * Blit:
310 * - XY_MONO_SRC_BLT_CMD
311 * - use XY_SETUP_CLIP_BLT for cliprect clipping.
312 * - XY_TEXT_BLT
313 * - XY_TEXT_IMMEDIATE_BLT
314 * - blit per cliprect, subject to maximum immediate data size.
315 * - XY_COLOR_BLT
316 * - per pixel or run of pixels
317 * - XY_PIXEL_BLT
318 * - good for sparse bitmaps
319 *
320 * 3D engine:
321 * - Point per pixel
322 * - Translate bitmap to an alpha texture and render as a quad
323 * - Chop bitmap up into 32x32 squares and render w/polygon stipple.
324 */
325 void
intelBitmap(struct gl_context * ctx,GLint x,GLint y,GLsizei width,GLsizei height,const struct gl_pixelstore_attrib * unpack,const GLubyte * pixels)326 intelBitmap(struct gl_context * ctx,
327 GLint x, GLint y,
328 GLsizei width, GLsizei height,
329 const struct gl_pixelstore_attrib *unpack,
330 const GLubyte * pixels)
331 {
332 if (!_mesa_check_conditional_render(ctx))
333 return;
334
335 if (do_blit_bitmap(ctx, x, y, width, height,
336 unpack, pixels))
337 return;
338
339 _mesa_meta_Bitmap(ctx, x, y, width, height, unpack, pixels);
340 }
341