drawpix.c revision e7c2b711a3b01cbeb0bf93d5442599457e7f8f51 
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 "mfeatures.h"
34#include "pbo.h"
35#include "readpix.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   GET_CURRENT_CONTEXT(ctx);
51   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
52
53   if (MESA_VERBOSE & VERBOSE_API)
54      _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
55                  width, height,
56                  _mesa_lookup_enum_by_nr(format),
57                  _mesa_lookup_enum_by_nr(type),
58                  pixels,
59                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
60                  IROUND(ctx->Current.RasterPos[0]),
61                  IROUND(ctx->Current.RasterPos[1]));
62
63
64   if (width < 0 || height < 0) {
65      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
66      return;
67   }
68
69   /* We're not using the current vertex program, and the driver may install
70    * its own.  Note: this may dirty some state.
71    */
72   _mesa_set_vp_override(ctx, GL_TRUE);
73
74   /* Note: this call does state validation */
75   if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
76      goto end;      /* the error code was recorded */
77   }
78
79   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
80      goto end;      /* the error code was recorded */
81   }
82
83   if (ctx->TransformFeedback.RasterDiscard) {
84      goto end;
85   }
86
87   if (!ctx->Current.RasterPosValid) {
88      goto end;  /* no-op, not an error */
89   }
90
91   if (ctx->RenderMode == GL_RENDER) {
92      if (width > 0 && height > 0) {
93         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
94         GLint x = IROUND(ctx->Current.RasterPos[0]);
95         GLint y = IROUND(ctx->Current.RasterPos[1]);
96
97         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
98            /* unpack from PBO */
99            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
100                                           1, format, type, INT_MAX, pixels)) {
101               _mesa_error(ctx, GL_INVALID_OPERATION,
102                           "glDrawPixels(invalid PBO access)");
103               goto end;
104            }
105            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
106               /* buffer is mapped - that's an error */
107               _mesa_error(ctx, GL_INVALID_OPERATION,
108                           "glDrawPixels(PBO is mapped)");
109               goto end;
110            }
111         }
112
113         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
114                                &ctx->Unpack, pixels);
115      }
116   }
117   else if (ctx->RenderMode == GL_FEEDBACK) {
118      /* Feedback the current raster pos info */
119      FLUSH_CURRENT( ctx, 0 );
120      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
121      _mesa_feedback_vertex( ctx,
122                             ctx->Current.RasterPos,
123                             ctx->Current.RasterColor,
124                             ctx->Current.RasterTexCoords[0] );
125   }
126   else {
127      ASSERT(ctx->RenderMode == GL_SELECT);
128      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
129   }
130
131end:
132   _mesa_set_vp_override(ctx, GL_FALSE);
133}
134
135
136static void GLAPIENTRY
137_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
138                  GLenum type )
139{
140   GET_CURRENT_CONTEXT(ctx);
141   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
142
143   if (MESA_VERBOSE & VERBOSE_API)
144      _mesa_debug(ctx,
145                  "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
146                  srcx, srcy, width, height,
147                  _mesa_lookup_enum_by_nr(type),
148                  _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
149                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
150                  IROUND(ctx->Current.RasterPos[0]),
151                  IROUND(ctx->Current.RasterPos[1]));
152
153   if (width < 0 || height < 0) {
154      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
155      return;
156   }
157
158   /* Note: more detailed 'type' checking is done by the
159    * _mesa_source/dest_buffer_exists() calls below.  That's where we
160    * check if the stencil buffer exists, etc.
161    */
162   if (type != GL_COLOR &&
163       type != GL_DEPTH &&
164       type != GL_STENCIL &&
165       type != GL_DEPTH_STENCIL) {
166      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
167                  _mesa_lookup_enum_by_nr(type));
168      return;
169   }
170
171   /* We're not using the current vertex program, and the driver may install
172    * it's own.  Note: this may dirty some state.
173    */
174   _mesa_set_vp_override(ctx, GL_TRUE);
175
176   /* Note: this call does state validation */
177   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
178      goto end;      /* the error code was recorded */
179   }
180
181   /* Check read buffer's status (draw buffer was already checked) */
182   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
183      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
184                  "glCopyPixels(incomplete framebuffer)" );
185      goto end;
186   }
187
188   if (!_mesa_source_buffer_exists(ctx, type) ||
189       !_mesa_dest_buffer_exists(ctx, type)) {
190      _mesa_error(ctx, GL_INVALID_OPERATION,
191                  "glCopyPixels(missing source or dest buffer)");
192      goto end;
193   }
194
195   if (ctx->TransformFeedback.RasterDiscard) {
196      goto end;
197   }
198
199   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
200      goto end; /* no-op, not an error */
201   }
202
203   if (ctx->RenderMode == GL_RENDER) {
204      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
205      if (width > 0 && height > 0) {
206         GLint destx = IROUND(ctx->Current.RasterPos[0]);
207         GLint desty = IROUND(ctx->Current.RasterPos[1]);
208         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
209                                 type );
210      }
211   }
212   else if (ctx->RenderMode == GL_FEEDBACK) {
213      FLUSH_CURRENT( ctx, 0 );
214      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
215      _mesa_feedback_vertex( ctx,
216                             ctx->Current.RasterPos,
217                             ctx->Current.RasterColor,
218                             ctx->Current.RasterTexCoords[0] );
219   }
220   else {
221      ASSERT(ctx->RenderMode == GL_SELECT);
222      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
223   }
224
225end:
226   _mesa_set_vp_override(ctx, GL_FALSE);
227}
228
229
230static void GLAPIENTRY
231_mesa_Bitmap( GLsizei width, GLsizei height,
232              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
233              const GLubyte *bitmap )
234{
235   GET_CURRENT_CONTEXT(ctx);
236   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
237
238   if (width < 0 || height < 0) {
239      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
240      return;
241   }
242
243   if (!ctx->Current.RasterPosValid) {
244      return;    /* do nothing */
245   }
246
247   /* Note: this call does state validation */
248   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
249      /* the error code was recorded */
250      return;
251   }
252
253   if (ctx->TransformFeedback.RasterDiscard)
254      return;
255
256   if (ctx->RenderMode == GL_RENDER) {
257      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
258      if (width > 0 && height > 0) {
259         const GLfloat epsilon = 0.0001F;
260         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
261         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
262
263         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
264            /* unpack from PBO */
265            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
266                                           1, GL_COLOR_INDEX, GL_BITMAP,
267                                           INT_MAX, (const GLvoid *) bitmap)) {
268               _mesa_error(ctx, GL_INVALID_OPERATION,
269                           "glBitmap(invalid PBO access)");
270               return;
271            }
272            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
273               /* buffer is mapped - that's an error */
274               _mesa_error(ctx, GL_INVALID_OPERATION,
275                           "glBitmap(PBO is mapped)");
276               return;
277            }
278         }
279
280         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
281      }
282   }
283#if _HAVE_FULL_GL
284   else if (ctx->RenderMode == GL_FEEDBACK) {
285      FLUSH_CURRENT(ctx, 0);
286      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
287      _mesa_feedback_vertex( ctx,
288                             ctx->Current.RasterPos,
289                             ctx->Current.RasterColor,
290                             ctx->Current.RasterTexCoords[0] );
291   }
292   else {
293      ASSERT(ctx->RenderMode == GL_SELECT);
294      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
295   }
296#endif
297
298   /* update raster position */
299   ctx->Current.RasterPos[0] += xmove;
300   ctx->Current.RasterPos[1] += ymove;
301}
302
303
304void
305_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
306{
307   SET_Bitmap(disp, _mesa_Bitmap);
308   SET_CopyPixels(disp, _mesa_CopyPixels);
309   SET_DrawPixels(disp, _mesa_DrawPixels);
310}
311
312
313#endif /* FEATURE_drawpix */
314