drawpix.c revision aee96806f049c17384a8edc11acce76257d98a57 
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 "readpix.h"
37#include "state.h"
38#include "dispatch.h"
39
40
41#if FEATURE_drawpix
42
43
44/*
45 * Execute glDrawPixels
46 */
47static void GLAPIENTRY
48_mesa_DrawPixels( GLsizei width, GLsizei height,
49                  GLenum format, GLenum type, const GLvoid *pixels )
50{
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   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
98      goto end;      /* the error code was recorded */
99   }
100
101   if (ctx->RasterDiscard) {
102      goto end;
103   }
104
105   if (!ctx->Current.RasterPosValid) {
106      goto end;  /* no-op, not an error */
107   }
108
109   if (ctx->RenderMode == GL_RENDER) {
110      if (width > 0 && height > 0) {
111         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
112         GLint x = IROUND(ctx->Current.RasterPos[0]);
113         GLint y = IROUND(ctx->Current.RasterPos[1]);
114
115         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
116            /* unpack from PBO */
117            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
118                                           1, format, type, INT_MAX, pixels)) {
119               _mesa_error(ctx, GL_INVALID_OPERATION,
120                           "glDrawPixels(invalid PBO access)");
121               goto end;
122            }
123            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
124               /* buffer is mapped - that's an error */
125               _mesa_error(ctx, GL_INVALID_OPERATION,
126                           "glDrawPixels(PBO is mapped)");
127               goto end;
128            }
129         }
130
131         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
132                                &ctx->Unpack, pixels);
133      }
134   }
135   else if (ctx->RenderMode == GL_FEEDBACK) {
136      /* Feedback the current raster pos info */
137      FLUSH_CURRENT( ctx, 0 );
138      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
139      _mesa_feedback_vertex( ctx,
140                             ctx->Current.RasterPos,
141                             ctx->Current.RasterColor,
142                             ctx->Current.RasterTexCoords[0] );
143   }
144   else {
145      ASSERT(ctx->RenderMode == GL_SELECT);
146      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
147   }
148
149end:
150   _mesa_set_vp_override(ctx, GL_FALSE);
151}
152
153
154static void GLAPIENTRY
155_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
156                  GLenum type )
157{
158   GET_CURRENT_CONTEXT(ctx);
159   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
160
161   if (MESA_VERBOSE & VERBOSE_API)
162      _mesa_debug(ctx,
163                  "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
164                  srcx, srcy, width, height,
165                  _mesa_lookup_enum_by_nr(type),
166                  _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
167                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
168                  IROUND(ctx->Current.RasterPos[0]),
169                  IROUND(ctx->Current.RasterPos[1]));
170
171   if (width < 0 || height < 0) {
172      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
173      return;
174   }
175
176   /* Note: more detailed 'type' checking is done by the
177    * _mesa_source/dest_buffer_exists() calls below.  That's where we
178    * check if the stencil buffer exists, etc.
179    */
180   if (type != GL_COLOR &&
181       type != GL_DEPTH &&
182       type != GL_STENCIL &&
183       type != GL_DEPTH_STENCIL) {
184      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
185                  _mesa_lookup_enum_by_nr(type));
186      return;
187   }
188
189   /* We're not using the current vertex program, and the driver may install
190    * it's own.  Note: this may dirty some state.
191    */
192   _mesa_set_vp_override(ctx, GL_TRUE);
193
194   /* Note: this call does state validation */
195   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
196      goto end;      /* the error code was recorded */
197   }
198
199   /* Check read buffer's status (draw buffer was already checked) */
200   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
201      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
202                  "glCopyPixels(incomplete framebuffer)" );
203      goto end;
204   }
205
206   if (!_mesa_source_buffer_exists(ctx, type) ||
207       !_mesa_dest_buffer_exists(ctx, type)) {
208      _mesa_error(ctx, GL_INVALID_OPERATION,
209                  "glCopyPixels(missing source or dest buffer)");
210      goto end;
211   }
212
213   if (ctx->RasterDiscard) {
214      goto end;
215   }
216
217   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
218      goto end; /* no-op, not an error */
219   }
220
221   if (ctx->RenderMode == GL_RENDER) {
222      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
223      if (width > 0 && height > 0) {
224         GLint destx = IROUND(ctx->Current.RasterPos[0]);
225         GLint desty = IROUND(ctx->Current.RasterPos[1]);
226         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
227                                 type );
228      }
229   }
230   else if (ctx->RenderMode == GL_FEEDBACK) {
231      FLUSH_CURRENT( ctx, 0 );
232      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
233      _mesa_feedback_vertex( ctx,
234                             ctx->Current.RasterPos,
235                             ctx->Current.RasterColor,
236                             ctx->Current.RasterTexCoords[0] );
237   }
238   else {
239      ASSERT(ctx->RenderMode == GL_SELECT);
240      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
241   }
242
243end:
244   _mesa_set_vp_override(ctx, GL_FALSE);
245}
246
247
248static void GLAPIENTRY
249_mesa_Bitmap( GLsizei width, GLsizei height,
250              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
251              const GLubyte *bitmap )
252{
253   GET_CURRENT_CONTEXT(ctx);
254   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
255
256   if (width < 0 || height < 0) {
257      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
258      return;
259   }
260
261   if (!ctx->Current.RasterPosValid) {
262      return;    /* do nothing */
263   }
264
265   /* Note: this call does state validation */
266   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
267      /* the error code was recorded */
268      return;
269   }
270
271   if (ctx->RasterDiscard)
272      return;
273
274   if (ctx->RenderMode == GL_RENDER) {
275      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
276      if (width > 0 && height > 0) {
277         const GLfloat epsilon = 0.0001F;
278         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
279         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
280
281         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
282            /* unpack from PBO */
283            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
284                                           1, GL_COLOR_INDEX, GL_BITMAP,
285                                           INT_MAX, (const GLvoid *) bitmap)) {
286               _mesa_error(ctx, GL_INVALID_OPERATION,
287                           "glBitmap(invalid PBO access)");
288               return;
289            }
290            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
291               /* buffer is mapped - that's an error */
292               _mesa_error(ctx, GL_INVALID_OPERATION,
293                           "glBitmap(PBO is mapped)");
294               return;
295            }
296         }
297
298         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
299      }
300   }
301#if _HAVE_FULL_GL
302   else if (ctx->RenderMode == GL_FEEDBACK) {
303      FLUSH_CURRENT(ctx, 0);
304      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
305      _mesa_feedback_vertex( ctx,
306                             ctx->Current.RasterPos,
307                             ctx->Current.RasterColor,
308                             ctx->Current.RasterTexCoords[0] );
309   }
310   else {
311      ASSERT(ctx->RenderMode == GL_SELECT);
312      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
313   }
314#endif
315
316   /* update raster position */
317   ctx->Current.RasterPos[0] += xmove;
318   ctx->Current.RasterPos[1] += ymove;
319}
320
321
322void
323_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
324{
325   SET_Bitmap(disp, _mesa_Bitmap);
326   SET_CopyPixels(disp, _mesa_CopyPixels);
327   SET_DrawPixels(disp, _mesa_DrawPixels);
328}
329
330
331#endif /* FEATURE_drawpix */
332