1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "glheader.h"
26 #include "imports.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 "mfeatures.h"
35 #include "pbo.h"
36 #include "state.h"
37 #include "dispatch.h"
38 #include "glformats.h"
39 #include "fbobject.h"
40
41
42 #if FEATURE_drawpix
43
44
45 /*
46 * Execute glDrawPixels
47 */
48 static void GLAPIENTRY
_mesa_DrawPixels(GLsizei width,GLsizei height,GLenum format,GLenum type,const GLvoid * pixels)49 _mesa_DrawPixels( GLsizei width, GLsizei height,
50 GLenum format, GLenum type, const GLvoid *pixels )
51 {
52 GLenum err;
53 GET_CURRENT_CONTEXT(ctx);
54 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
55
56 if (MESA_VERBOSE & VERBOSE_API)
57 _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
58 width, height,
59 _mesa_lookup_enum_by_nr(format),
60 _mesa_lookup_enum_by_nr(type),
61 pixels,
62 _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
63 IROUND(ctx->Current.RasterPos[0]),
64 IROUND(ctx->Current.RasterPos[1]));
65
66
67 if (width < 0 || height < 0) {
68 _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
69 return;
70 }
71
72 /* We're not using the current vertex program, and the driver may install
73 * its own. Note: this may dirty some state.
74 */
75 _mesa_set_vp_override(ctx, GL_TRUE);
76
77 /* Note: this call does state validation */
78 if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
79 goto end; /* the error code was recorded */
80 }
81
82 /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
83 * GL_EXT_texture_integer. From section 3.7.4 ("Rasterization of Pixel
84 * Rectangles) on page 151 of the GL 3.0 specification:
85 *
86 * "If format contains integer components, as shown in table 3.6, an
87 * INVALID OPERATION error is generated."
88 *
89 * Since DrawPixels rendering would be merely undefined if not an error (due
90 * to a lack of defined mapping from integer data to gl_Color fragment shader
91 * input), NVIDIA's implementation also just returns this error despite
92 * exposing GL_EXT_texture_integer, just return an error regardless.
93 */
94 if (_mesa_is_enum_format_integer(format)) {
95 _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
96 goto end;
97 }
98
99 err = _mesa_error_check_format_and_type(ctx, format, type);
100 if (err != GL_NO_ERROR) {
101 _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
102 _mesa_lookup_enum_by_nr(format),
103 _mesa_lookup_enum_by_nr(type));
104 goto end;
105 }
106
107 /* do special format-related checks */
108 switch (format) {
109 case GL_STENCIL_INDEX:
110 case GL_DEPTH_COMPONENT:
111 case GL_DEPTH_STENCIL_EXT:
112 /* these buffers must exist */
113 if (!_mesa_dest_buffer_exists(ctx, format)) {
114 _mesa_error(ctx, GL_INVALID_OPERATION,
115 "glDrawPixels(missing deest buffer)");
116 goto end;
117 }
118 break;
119 case GL_COLOR_INDEX:
120 if (ctx->PixelMaps.ItoR.Size == 0 ||
121 ctx->PixelMaps.ItoG.Size == 0 ||
122 ctx->PixelMaps.ItoB.Size == 0) {
123 _mesa_error(ctx, GL_INVALID_OPERATION,
124 "glDrawPixels(drawing color index pixels into RGB buffer)");
125 goto end;
126 }
127 break;
128 default:
129 /* for color formats it's not an error if the destination color
130 * buffer doesn't exist.
131 */
132 break;
133 }
134
135 if (ctx->RasterDiscard) {
136 goto end;
137 }
138
139 if (!ctx->Current.RasterPosValid) {
140 goto end; /* no-op, not an error */
141 }
142
143 if (ctx->RenderMode == GL_RENDER) {
144 if (width > 0 && height > 0) {
145 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
146 GLint x = IROUND(ctx->Current.RasterPos[0]);
147 GLint y = IROUND(ctx->Current.RasterPos[1]);
148
149 if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
150 /* unpack from PBO */
151 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
152 1, format, type, INT_MAX, pixels)) {
153 _mesa_error(ctx, GL_INVALID_OPERATION,
154 "glDrawPixels(invalid PBO access)");
155 goto end;
156 }
157 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
158 /* buffer is mapped - that's an error */
159 _mesa_error(ctx, GL_INVALID_OPERATION,
160 "glDrawPixels(PBO is mapped)");
161 goto end;
162 }
163 }
164
165 ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
166 &ctx->Unpack, pixels);
167 }
168 }
169 else if (ctx->RenderMode == GL_FEEDBACK) {
170 /* Feedback the current raster pos info */
171 FLUSH_CURRENT( ctx, 0 );
172 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
173 _mesa_feedback_vertex( ctx,
174 ctx->Current.RasterPos,
175 ctx->Current.RasterColor,
176 ctx->Current.RasterTexCoords[0] );
177 }
178 else {
179 ASSERT(ctx->RenderMode == GL_SELECT);
180 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
181 }
182
183 end:
184 _mesa_set_vp_override(ctx, GL_FALSE);
185
186 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
187 _mesa_flush(ctx);
188 }
189 }
190
191
192 static void GLAPIENTRY
_mesa_CopyPixels(GLint srcx,GLint srcy,GLsizei width,GLsizei height,GLenum type)193 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
194 GLenum type )
195 {
196 GET_CURRENT_CONTEXT(ctx);
197 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
198
199 if (MESA_VERBOSE & VERBOSE_API)
200 _mesa_debug(ctx,
201 "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
202 srcx, srcy, width, height,
203 _mesa_lookup_enum_by_nr(type),
204 _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
205 _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
206 IROUND(ctx->Current.RasterPos[0]),
207 IROUND(ctx->Current.RasterPos[1]));
208
209 if (width < 0 || height < 0) {
210 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
211 return;
212 }
213
214 /* Note: more detailed 'type' checking is done by the
215 * _mesa_source/dest_buffer_exists() calls below. That's where we
216 * check if the stencil buffer exists, etc.
217 */
218 if (type != GL_COLOR &&
219 type != GL_DEPTH &&
220 type != GL_STENCIL &&
221 type != GL_DEPTH_STENCIL) {
222 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
223 _mesa_lookup_enum_by_nr(type));
224 return;
225 }
226
227 /* We're not using the current vertex program, and the driver may install
228 * it's own. Note: this may dirty some state.
229 */
230 _mesa_set_vp_override(ctx, GL_TRUE);
231
232 /* Note: this call does state validation */
233 if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
234 goto end; /* the error code was recorded */
235 }
236
237 /* Check read buffer's status (draw buffer was already checked) */
238 if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
239 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
240 "glCopyPixels(incomplete framebuffer)" );
241 goto end;
242 }
243
244 if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
245 ctx->ReadBuffer->Visual.samples > 0) {
246 _mesa_error(ctx, GL_INVALID_OPERATION,
247 "glCopyPixels(multisample FBO)");
248 goto end;
249 }
250
251 if (!_mesa_source_buffer_exists(ctx, type) ||
252 !_mesa_dest_buffer_exists(ctx, type)) {
253 _mesa_error(ctx, GL_INVALID_OPERATION,
254 "glCopyPixels(missing source or dest buffer)");
255 goto end;
256 }
257
258 if (ctx->RasterDiscard) {
259 goto end;
260 }
261
262 if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
263 goto end; /* no-op, not an error */
264 }
265
266 if (ctx->RenderMode == GL_RENDER) {
267 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
268 if (width > 0 && height > 0) {
269 GLint destx = IROUND(ctx->Current.RasterPos[0]);
270 GLint desty = IROUND(ctx->Current.RasterPos[1]);
271 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
272 type );
273 }
274 }
275 else if (ctx->RenderMode == GL_FEEDBACK) {
276 FLUSH_CURRENT( ctx, 0 );
277 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
278 _mesa_feedback_vertex( ctx,
279 ctx->Current.RasterPos,
280 ctx->Current.RasterColor,
281 ctx->Current.RasterTexCoords[0] );
282 }
283 else {
284 ASSERT(ctx->RenderMode == GL_SELECT);
285 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
286 }
287
288 end:
289 _mesa_set_vp_override(ctx, GL_FALSE);
290
291 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
292 _mesa_flush(ctx);
293 }
294 }
295
296
297 static void GLAPIENTRY
_mesa_Bitmap(GLsizei width,GLsizei height,GLfloat xorig,GLfloat yorig,GLfloat xmove,GLfloat ymove,const GLubyte * bitmap)298 _mesa_Bitmap( GLsizei width, GLsizei height,
299 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
300 const GLubyte *bitmap )
301 {
302 GET_CURRENT_CONTEXT(ctx);
303 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
304
305 if (width < 0 || height < 0) {
306 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
307 return;
308 }
309
310 if (!ctx->Current.RasterPosValid) {
311 return; /* do nothing */
312 }
313
314 /* Note: this call does state validation */
315 if (!_mesa_valid_to_render(ctx, "glBitmap")) {
316 /* the error code was recorded */
317 return;
318 }
319
320 if (ctx->RasterDiscard)
321 return;
322
323 if (ctx->RenderMode == GL_RENDER) {
324 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
325 if (width > 0 && height > 0) {
326 const GLfloat epsilon = 0.0001F;
327 GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
328 GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
329
330 if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
331 /* unpack from PBO */
332 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
333 1, GL_COLOR_INDEX, GL_BITMAP,
334 INT_MAX, (const GLvoid *) bitmap)) {
335 _mesa_error(ctx, GL_INVALID_OPERATION,
336 "glBitmap(invalid PBO access)");
337 return;
338 }
339 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
340 /* buffer is mapped - that's an error */
341 _mesa_error(ctx, GL_INVALID_OPERATION,
342 "glBitmap(PBO is mapped)");
343 return;
344 }
345 }
346
347 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
348 }
349 }
350 #if _HAVE_FULL_GL
351 else if (ctx->RenderMode == GL_FEEDBACK) {
352 FLUSH_CURRENT(ctx, 0);
353 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
354 _mesa_feedback_vertex( ctx,
355 ctx->Current.RasterPos,
356 ctx->Current.RasterColor,
357 ctx->Current.RasterTexCoords[0] );
358 }
359 else {
360 ASSERT(ctx->RenderMode == GL_SELECT);
361 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
362 }
363 #endif
364
365 /* update raster position */
366 ctx->Current.RasterPos[0] += xmove;
367 ctx->Current.RasterPos[1] += ymove;
368
369 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
370 _mesa_flush(ctx);
371 }
372 }
373
374
375 void
_mesa_init_drawpix_dispatch(struct _glapi_table * disp)376 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
377 {
378 SET_Bitmap(disp, _mesa_Bitmap);
379 SET_CopyPixels(disp, _mesa_CopyPixels);
380 SET_DrawPixels(disp, _mesa_DrawPixels);
381 }
382
383
384 #endif /* FEATURE_drawpix */
385