drawpix.c revision e9b908b014be57cd2d3f0432adf16ac5b9631325 
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
39
40#if FEATURE_drawpix
41
42
43/*
44 * Execute glDrawPixels
45 */
46static void GLAPIENTRY
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   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
53
54   if (MESA_VERBOSE & VERBOSE_API)
55      _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
56                  width, height,
57                  _mesa_lookup_enum_by_nr(format),
58                  _mesa_lookup_enum_by_nr(type),
59                  pixels,
60                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
61                  IROUND(ctx->Current.RasterPos[0]),
62                  IROUND(ctx->Current.RasterPos[1]));
63
64
65   if (width < 0 || height < 0) {
66      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
67      return;
68   }
69
70   /* We're not using the current vertex program, and the driver may install
71    * its own.  Note: this may dirty some state.
72    */
73   _mesa_set_vp_override(ctx, GL_TRUE);
74
75   /* Note: this call does state validation */
76   if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
77      goto end;      /* the error code was recorded */
78   }
79
80   /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
81    * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
82    * Rectangles) on page 151 of the GL 3.0 specification:
83    *
84    *     "If format contains integer components, as shown in table 3.6, an
85    *      INVALID OPERATION error is generated."
86    *
87    * Since DrawPixels rendering would be merely undefined if not an error (due
88    * to a lack of defined mapping from integer data to gl_Color fragment shader
89    * input), NVIDIA's implementation also just returns this error despite
90    * exposing GL_EXT_texture_integer, just return an error regardless.
91    */
92   if (_mesa_is_integer_format(format)) {
93      _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
94      goto end;
95   }
96
97   err = _mesa_error_check_format_and_type(ctx, format, type);
98   if (err != GL_NO_ERROR) {
99      _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
100                  _mesa_lookup_enum_by_nr(format),
101                  _mesa_lookup_enum_by_nr(type));
102      goto end;
103   }
104
105   /* do special format-related checks */
106   switch (format) {
107   case GL_STENCIL_INDEX:
108   case GL_DEPTH_COMPONENT:
109   case GL_DEPTH_STENCIL_EXT:
110      /* these buffers must exist */
111      if (!_mesa_dest_buffer_exists(ctx, format)) {
112         _mesa_error(ctx, GL_INVALID_OPERATION,
113                     "glDrawPixels(missing deest buffer)");
114         goto end;
115      }
116      break;
117   case GL_COLOR_INDEX:
118      if (ctx->PixelMaps.ItoR.Size == 0 ||
119          ctx->PixelMaps.ItoG.Size == 0 ||
120          ctx->PixelMaps.ItoB.Size == 0) {
121         _mesa_error(ctx, GL_INVALID_OPERATION,
122                "glDrawPixels(drawing color index pixels into RGB buffer)");
123         goto end;
124      }
125      break;
126   default:
127      /* for color formats it's not an error if the destination color
128       * buffer doesn't exist.
129       */
130      break;
131   }
132
133   if (ctx->RasterDiscard) {
134      goto end;
135   }
136
137   if (!ctx->Current.RasterPosValid) {
138      goto end;  /* no-op, not an error */
139   }
140
141   if (ctx->RenderMode == GL_RENDER) {
142      if (width > 0 && height > 0) {
143         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
144         GLint x = IROUND(ctx->Current.RasterPos[0]);
145         GLint y = IROUND(ctx->Current.RasterPos[1]);
146
147         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
148            /* unpack from PBO */
149            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
150                                           1, format, type, INT_MAX, pixels)) {
151               _mesa_error(ctx, GL_INVALID_OPERATION,
152                           "glDrawPixels(invalid PBO access)");
153               goto end;
154            }
155            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
156               /* buffer is mapped - that's an error */
157               _mesa_error(ctx, GL_INVALID_OPERATION,
158                           "glDrawPixels(PBO is mapped)");
159               goto end;
160            }
161         }
162
163         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
164                                &ctx->Unpack, pixels);
165      }
166   }
167   else if (ctx->RenderMode == GL_FEEDBACK) {
168      /* Feedback the current raster pos info */
169      FLUSH_CURRENT( ctx, 0 );
170      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
171      _mesa_feedback_vertex( ctx,
172                             ctx->Current.RasterPos,
173                             ctx->Current.RasterColor,
174                             ctx->Current.RasterTexCoords[0] );
175   }
176   else {
177      ASSERT(ctx->RenderMode == GL_SELECT);
178      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
179   }
180
181end:
182   _mesa_set_vp_override(ctx, GL_FALSE);
183
184   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
185      _mesa_flush(ctx);
186   }
187}
188
189
190static void GLAPIENTRY
191_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
192                  GLenum type )
193{
194   GET_CURRENT_CONTEXT(ctx);
195   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
196
197   if (MESA_VERBOSE & VERBOSE_API)
198      _mesa_debug(ctx,
199                  "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
200                  srcx, srcy, width, height,
201                  _mesa_lookup_enum_by_nr(type),
202                  _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
203                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
204                  IROUND(ctx->Current.RasterPos[0]),
205                  IROUND(ctx->Current.RasterPos[1]));
206
207   if (width < 0 || height < 0) {
208      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
209      return;
210   }
211
212   /* Note: more detailed 'type' checking is done by the
213    * _mesa_source/dest_buffer_exists() calls below.  That's where we
214    * check if the stencil buffer exists, etc.
215    */
216   if (type != GL_COLOR &&
217       type != GL_DEPTH &&
218       type != GL_STENCIL &&
219       type != GL_DEPTH_STENCIL) {
220      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
221                  _mesa_lookup_enum_by_nr(type));
222      return;
223   }
224
225   /* We're not using the current vertex program, and the driver may install
226    * it's own.  Note: this may dirty some state.
227    */
228   _mesa_set_vp_override(ctx, GL_TRUE);
229
230   /* Note: this call does state validation */
231   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
232      goto end;      /* the error code was recorded */
233   }
234
235   /* Check read buffer's status (draw buffer was already checked) */
236   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
237      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
238                  "glCopyPixels(incomplete framebuffer)" );
239      goto end;
240   }
241
242   if (ctx->ReadBuffer->Name != 0 && ctx->ReadBuffer->Visual.samples > 0) {
243      _mesa_error(ctx, GL_INVALID_OPERATION,
244		  "glCopyPixels(multisample FBO)");
245      goto end;
246   }
247
248   if (!_mesa_source_buffer_exists(ctx, type) ||
249       !_mesa_dest_buffer_exists(ctx, type)) {
250      _mesa_error(ctx, GL_INVALID_OPERATION,
251                  "glCopyPixels(missing source or dest buffer)");
252      goto end;
253   }
254
255   if (ctx->RasterDiscard) {
256      goto end;
257   }
258
259   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
260      goto end; /* no-op, not an error */
261   }
262
263   if (ctx->RenderMode == GL_RENDER) {
264      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
265      if (width > 0 && height > 0) {
266         GLint destx = IROUND(ctx->Current.RasterPos[0]);
267         GLint desty = IROUND(ctx->Current.RasterPos[1]);
268         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
269                                 type );
270      }
271   }
272   else if (ctx->RenderMode == GL_FEEDBACK) {
273      FLUSH_CURRENT( ctx, 0 );
274      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
275      _mesa_feedback_vertex( ctx,
276                             ctx->Current.RasterPos,
277                             ctx->Current.RasterColor,
278                             ctx->Current.RasterTexCoords[0] );
279   }
280   else {
281      ASSERT(ctx->RenderMode == GL_SELECT);
282      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
283   }
284
285end:
286   _mesa_set_vp_override(ctx, GL_FALSE);
287
288   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
289      _mesa_flush(ctx);
290   }
291}
292
293
294static void GLAPIENTRY
295_mesa_Bitmap( GLsizei width, GLsizei height,
296              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
297              const GLubyte *bitmap )
298{
299   GET_CURRENT_CONTEXT(ctx);
300   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
301
302   if (width < 0 || height < 0) {
303      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
304      return;
305   }
306
307   if (!ctx->Current.RasterPosValid) {
308      return;    /* do nothing */
309   }
310
311   /* Note: this call does state validation */
312   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
313      /* the error code was recorded */
314      return;
315   }
316
317   if (ctx->RasterDiscard)
318      return;
319
320   if (ctx->RenderMode == GL_RENDER) {
321      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
322      if (width > 0 && height > 0) {
323         const GLfloat epsilon = 0.0001F;
324         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
325         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
326
327         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
328            /* unpack from PBO */
329            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
330                                           1, GL_COLOR_INDEX, GL_BITMAP,
331                                           INT_MAX, (const GLvoid *) bitmap)) {
332               _mesa_error(ctx, GL_INVALID_OPERATION,
333                           "glBitmap(invalid PBO access)");
334               return;
335            }
336            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
337               /* buffer is mapped - that's an error */
338               _mesa_error(ctx, GL_INVALID_OPERATION,
339                           "glBitmap(PBO is mapped)");
340               return;
341            }
342         }
343
344         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
345      }
346   }
347#if _HAVE_FULL_GL
348   else if (ctx->RenderMode == GL_FEEDBACK) {
349      FLUSH_CURRENT(ctx, 0);
350      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
351      _mesa_feedback_vertex( ctx,
352                             ctx->Current.RasterPos,
353                             ctx->Current.RasterColor,
354                             ctx->Current.RasterTexCoords[0] );
355   }
356   else {
357      ASSERT(ctx->RenderMode == GL_SELECT);
358      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
359   }
360#endif
361
362   /* update raster position */
363   ctx->Current.RasterPos[0] += xmove;
364   ctx->Current.RasterPos[1] += ymove;
365
366   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
367      _mesa_flush(ctx);
368   }
369}
370
371
372void
373_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
374{
375   SET_Bitmap(disp, _mesa_Bitmap);
376   SET_CopyPixels(disp, _mesa_CopyPixels);
377   SET_DrawPixels(disp, _mesa_DrawPixels);
378}
379
380
381#endif /* FEATURE_drawpix */
382