1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul 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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "glheader.h"
26 #include "draw_validate.h"
27 #include "bufferobj.h"
28 #include "context.h"
29 #include "drawpix.h"
30 #include "enums.h"
31 #include "feedback.h"
32 #include "framebuffer.h"
33 #include "image.h"
34 #include "pbo.h"
35 #include "pixel.h"
36 #include "state.h"
37 #include "glformats.h"
38 #include "fbobject.h"
39 #include "util/u_math.h"
40 #include "util/rounding.h"
41
42
43 /*
44 * Execute glDrawPixels
45 */
46 void GLAPIENTRY
_mesa_DrawPixels(GLsizei width,GLsizei height,GLenum format,GLenum type,const GLvoid * pixels)47 _mesa_DrawPixels( GLsizei width, GLsizei height,
48 GLenum format, GLenum type, const GLvoid *pixels )
49 {
50 GLenum err;
51 GET_CURRENT_CONTEXT(ctx);
52
53 FLUSH_VERTICES(ctx, 0, 0);
54
55 if (MESA_VERBOSE & VERBOSE_API)
56 _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %ld, %ld\n",
57 width, height,
58 _mesa_enum_to_string(format),
59 _mesa_enum_to_string(type),
60 pixels,
61 _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
62 lroundf(ctx->Current.RasterPos[0]),
63 lroundf(ctx->Current.RasterPos[1]));
64
65
66 if (width < 0 || height < 0) {
67 _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
68 return;
69 }
70
71 /* We're not using the current vertex program, and the driver may install
72 * its own. Note: this may dirty some state.
73 */
74 _mesa_set_vp_override(ctx, GL_TRUE);
75
76 _mesa_update_pixel(ctx);
77
78 if (ctx->NewState)
79 _mesa_update_state(ctx);
80
81 if (!ctx->DrawPixValid) {
82 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels");
83 goto end;
84 }
85
86 /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
87 * GL_EXT_texture_integer. From section 3.7.4 ("Rasterization of Pixel
88 * Rectangles) on page 151 of the GL 3.0 specification:
89 *
90 * "If format contains integer components, as shown in table 3.6, an
91 * INVALID OPERATION error is generated."
92 *
93 * Since DrawPixels rendering would be merely undefined if not an error (due
94 * to a lack of defined mapping from integer data to gl_Color fragment shader
95 * input), NVIDIA's implementation also just returns this error despite
96 * exposing GL_EXT_texture_integer, just return an error regardless.
97 */
98 if (_mesa_is_enum_format_integer(format)) {
99 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
100 goto end;
101 }
102
103 err = _mesa_error_check_format_and_type(ctx, format, type);
104 if (err != GL_NO_ERROR) {
105 _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
106 _mesa_enum_to_string(format),
107 _mesa_enum_to_string(type));
108 goto end;
109 }
110
111 /* do special format-related checks */
112 switch (format) {
113 case GL_STENCIL_INDEX:
114 case GL_DEPTH_COMPONENT:
115 case GL_DEPTH_STENCIL_EXT:
116 /* these buffers must exist */
117 if (!_mesa_dest_buffer_exists(ctx, format)) {
118 _mesa_error(ctx, GL_INVALID_OPERATION,
119 "glDrawPixels(missing dest buffer)");
120 goto end;
121 }
122 break;
123 case GL_COLOR_INDEX:
124 if (ctx->PixelMaps.ItoR.Size == 0 ||
125 ctx->PixelMaps.ItoG.Size == 0 ||
126 ctx->PixelMaps.ItoB.Size == 0) {
127 _mesa_error(ctx, GL_INVALID_OPERATION,
128 "glDrawPixels(drawing color index pixels into RGB buffer)");
129 goto end;
130 }
131 break;
132 default:
133 /* for color formats it's not an error if the destination color
134 * buffer doesn't exist.
135 */
136 break;
137 }
138
139 if (ctx->RasterDiscard) {
140 goto end;
141 }
142
143 if (!ctx->Current.RasterPosValid) {
144 goto end; /* no-op, not an error */
145 }
146
147 if (ctx->RenderMode == GL_RENDER) {
148 if (width > 0 && height > 0) {
149 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
150 GLint x = lroundf(ctx->Current.RasterPos[0]);
151 GLint y = lroundf(ctx->Current.RasterPos[1]);
152
153 if (ctx->Unpack.BufferObj) {
154 /* unpack from PBO */
155 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
156 1, format, type, INT_MAX, pixels)) {
157 _mesa_error(ctx, GL_INVALID_OPERATION,
158 "glDrawPixels(invalid PBO access)");
159 goto end;
160 }
161 if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
162 /* buffer is mapped - that's an error */
163 _mesa_error(ctx, GL_INVALID_OPERATION,
164 "glDrawPixels(PBO is mapped)");
165 goto end;
166 }
167 }
168
169 ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
170 &ctx->Unpack, pixels);
171 }
172 }
173 else if (ctx->RenderMode == GL_FEEDBACK) {
174 /* Feedback the current raster pos info */
175 FLUSH_CURRENT( ctx, 0 );
176 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
177 _mesa_feedback_vertex( ctx,
178 ctx->Current.RasterPos,
179 ctx->Current.RasterColor,
180 ctx->Current.RasterTexCoords[0] );
181 }
182 else {
183 assert(ctx->RenderMode == GL_SELECT);
184 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
185 }
186
187 end:
188 _mesa_set_vp_override(ctx, GL_FALSE);
189
190 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
191 _mesa_flush(ctx);
192 }
193 }
194
195
196 void GLAPIENTRY
_mesa_CopyPixels(GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLenum type)197 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
198 GLenum type )
199 {
200 GET_CURRENT_CONTEXT(ctx);
201
202 FLUSH_VERTICES(ctx, 0, 0);
203
204 if (MESA_VERBOSE & VERBOSE_API)
205 _mesa_debug(ctx,
206 "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %ld, %ld\n",
207 srcx, srcy, width, height,
208 _mesa_enum_to_string(type),
209 _mesa_enum_to_string(ctx->ReadBuffer->ColorReadBuffer),
210 _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
211 lroundf(ctx->Current.RasterPos[0]),
212 lroundf(ctx->Current.RasterPos[1]));
213
214 if (width < 0 || height < 0) {
215 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
216 return;
217 }
218
219 /* Note: more detailed 'type' checking is done by the
220 * _mesa_source/dest_buffer_exists() calls below. That's where we
221 * check if the stencil buffer exists, etc.
222 */
223 if (type != GL_COLOR &&
224 type != GL_DEPTH &&
225 type != GL_STENCIL &&
226 type != GL_DEPTH_STENCIL &&
227 type != GL_DEPTH_STENCIL_TO_RGBA_NV &&
228 type != GL_DEPTH_STENCIL_TO_BGRA_NV) {
229 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
230 _mesa_enum_to_string(type));
231 return;
232 }
233
234 /* Return GL_INVALID_ENUM if the relevant extension is not enabled */
235 if ((type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV) &&
236 !ctx->Extensions.NV_copy_depth_to_color) {
237 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
238 _mesa_enum_to_string(type));
239 return;
240 }
241
242 /* We're not using the current vertex program, and the driver may install
243 * it's own. Note: this may dirty some state.
244 */
245 _mesa_set_vp_override(ctx, GL_TRUE);
246
247 _mesa_update_pixel(ctx);
248
249 if (ctx->NewState)
250 _mesa_update_state(ctx);
251
252 if (!ctx->DrawPixValid) {
253 _mesa_error(ctx, GL_INVALID_OPERATION, "glCopyPixels");
254 goto end;
255 }
256
257 /* Check read buffer's status (draw buffer was already checked) */
258 if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
259 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
260 "glCopyPixels(incomplete framebuffer)" );
261 goto end;
262 }
263
264 if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
265 ctx->ReadBuffer->Visual.samples > 0) {
266 _mesa_error(ctx, GL_INVALID_OPERATION,
267 "glCopyPixels(multisample FBO)");
268 goto end;
269 }
270
271 if (!_mesa_source_buffer_exists(ctx, type) ||
272 !_mesa_dest_buffer_exists(ctx, type)) {
273 _mesa_error(ctx, GL_INVALID_OPERATION,
274 "glCopyPixels(missing source or dest buffer)");
275 goto end;
276 }
277
278 if (ctx->RasterDiscard) {
279 goto end;
280 }
281
282 if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
283 goto end; /* no-op, not an error */
284 }
285
286 if (ctx->RenderMode == GL_RENDER) {
287 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
288 if (width > 0 && height > 0) {
289 GLint destx = lroundf(ctx->Current.RasterPos[0]);
290 GLint desty = lroundf(ctx->Current.RasterPos[1]);
291 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
292 type );
293 }
294 }
295 else if (ctx->RenderMode == GL_FEEDBACK) {
296 FLUSH_CURRENT( ctx, 0 );
297 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
298 _mesa_feedback_vertex( ctx,
299 ctx->Current.RasterPos,
300 ctx->Current.RasterColor,
301 ctx->Current.RasterTexCoords[0] );
302 }
303 else {
304 assert(ctx->RenderMode == GL_SELECT);
305 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
306 }
307
308 end:
309 _mesa_set_vp_override(ctx, GL_FALSE);
310
311 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
312 _mesa_flush(ctx);
313 }
314 }
315
316
317 void GLAPIENTRY
_mesa_Bitmap(GLsizei width,GLsizei height,GLfloat xorig,GLfloat yorig,GLfloat xmove,GLfloat ymove,const GLubyte * bitmap)318 _mesa_Bitmap( GLsizei width, GLsizei height,
319 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
320 const GLubyte *bitmap )
321 {
322 GET_CURRENT_CONTEXT(ctx);
323
324 FLUSH_VERTICES(ctx, 0, 0);
325
326 if (width < 0 || height < 0) {
327 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
328 return;
329 }
330
331 if (!ctx->Current.RasterPosValid) {
332 return; /* do nothing */
333 }
334
335 _mesa_update_pixel(ctx);
336
337 if (ctx->NewState)
338 _mesa_update_state(ctx);
339
340 if (!ctx->DrawPixValid) {
341 _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap");
342 return;
343 }
344
345 if (ctx->RasterDiscard)
346 return;
347
348 if (ctx->RenderMode == GL_RENDER) {
349 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
350 if (width > 0 && height > 0) {
351 const GLfloat epsilon = 0.0001F;
352 GLint x = util_ifloor(ctx->Current.RasterPos[0] + epsilon - xorig);
353 GLint y = util_ifloor(ctx->Current.RasterPos[1] + epsilon - yorig);
354
355 if (ctx->Unpack.BufferObj) {
356 /* unpack from PBO */
357 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
358 1, GL_COLOR_INDEX, GL_BITMAP,
359 INT_MAX, (const GLvoid *) bitmap)) {
360 _mesa_error(ctx, GL_INVALID_OPERATION,
361 "glBitmap(invalid PBO access)");
362 return;
363 }
364 if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
365 /* buffer is mapped - that's an error */
366 _mesa_error(ctx, GL_INVALID_OPERATION,
367 "glBitmap(PBO is mapped)");
368 return;
369 }
370 }
371
372 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
373 }
374 }
375 else if (ctx->RenderMode == GL_FEEDBACK) {
376 FLUSH_CURRENT(ctx, 0);
377 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
378 _mesa_feedback_vertex( ctx,
379 ctx->Current.RasterPos,
380 ctx->Current.RasterColor,
381 ctx->Current.RasterTexCoords[0] );
382 }
383 else {
384 assert(ctx->RenderMode == GL_SELECT);
385 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
386 }
387
388 /* update raster position */
389 ctx->Current.RasterPos[0] += xmove;
390 ctx->Current.RasterPos[1] += ymove;
391 ctx->PopAttribState |= GL_CURRENT_BIT;
392
393 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
394 _mesa_flush(ctx);
395 }
396 }
397