drawpix.c revision e4852ae4d24396daa323652023655fb3b6456ff5 
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->Current.RasterPosValid) {
84      goto end;  /* no-op, not an error */
85   }
86
87   if (ctx->RenderMode == GL_RENDER) {
88      if (width > 0 && height > 0) {
89         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
90         GLint x = IROUND(ctx->Current.RasterPos[0]);
91         GLint y = IROUND(ctx->Current.RasterPos[1]);
92
93         if (ctx->Unpack.BufferObj->Name) {
94            /* unpack from PBO */
95            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
96                                           format, type, pixels)) {
97               _mesa_error(ctx, GL_INVALID_OPERATION,
98                           "glDrawPixels(invalid PBO access)");
99               goto end;
100            }
101            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
102               /* buffer is mapped - that's an error */
103               _mesa_error(ctx, GL_INVALID_OPERATION,
104                           "glDrawPixels(PBO is mapped)");
105               goto end;
106            }
107         }
108
109         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
110                                &ctx->Unpack, pixels);
111      }
112   }
113   else if (ctx->RenderMode == GL_FEEDBACK) {
114      /* Feedback the current raster pos info */
115      FLUSH_CURRENT( ctx, 0 );
116      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
117      _mesa_feedback_vertex( ctx,
118                             ctx->Current.RasterPos,
119                             ctx->Current.RasterColor,
120                             ctx->Current.RasterTexCoords[0] );
121   }
122   else {
123      ASSERT(ctx->RenderMode == GL_SELECT);
124      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
125   }
126
127end:
128   _mesa_set_vp_override(ctx, GL_FALSE);
129}
130
131
132static void GLAPIENTRY
133_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
134                  GLenum type )
135{
136   GET_CURRENT_CONTEXT(ctx);
137   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
138
139   if (MESA_VERBOSE & VERBOSE_API)
140      _mesa_debug(ctx,
141                  "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
142                  srcx, srcy, width, height,
143                  _mesa_lookup_enum_by_nr(type),
144                  _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
145                  _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
146                  IROUND(ctx->Current.RasterPos[0]),
147                  IROUND(ctx->Current.RasterPos[1]));
148
149   if (width < 0 || height < 0) {
150      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
151      return;
152   }
153
154   /* Note: more detailed 'type' checking is done by the
155    * _mesa_source/dest_buffer_exists() calls below.  That's where we
156    * check if the stencil buffer exists, etc.
157    */
158   if (type != GL_COLOR &&
159       type != GL_DEPTH &&
160       type != GL_STENCIL &&
161       type != GL_DEPTH_STENCIL) {
162      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
163                  _mesa_lookup_enum_by_nr(type));
164      return;
165   }
166
167   /* We're not using the current vertex program, and the driver may install
168    * it's own.  Note: this may dirty some state.
169    */
170   _mesa_set_vp_override(ctx, GL_TRUE);
171
172   /* Note: this call does state validation */
173   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
174      goto end;      /* the error code was recorded */
175   }
176
177   /* Check read buffer's status (draw buffer was already checked) */
178   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
179      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
180                  "glCopyPixels(incomplete framebuffer)" );
181      goto end;
182   }
183
184   if (!_mesa_source_buffer_exists(ctx, type) ||
185       !_mesa_dest_buffer_exists(ctx, type)) {
186      _mesa_error(ctx, GL_INVALID_OPERATION,
187                  "glCopyPixels(missing source or dest buffer)");
188      goto end;
189   }
190
191   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
192      goto end; /* no-op, not an error */
193   }
194
195   if (ctx->RenderMode == GL_RENDER) {
196      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
197      if (width > 0 && height > 0) {
198         GLint destx = IROUND(ctx->Current.RasterPos[0]);
199         GLint desty = IROUND(ctx->Current.RasterPos[1]);
200         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
201                                 type );
202      }
203   }
204   else if (ctx->RenderMode == GL_FEEDBACK) {
205      FLUSH_CURRENT( ctx, 0 );
206      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
207      _mesa_feedback_vertex( ctx,
208                             ctx->Current.RasterPos,
209                             ctx->Current.RasterColor,
210                             ctx->Current.RasterTexCoords[0] );
211   }
212   else {
213      ASSERT(ctx->RenderMode == GL_SELECT);
214      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
215   }
216
217end:
218   _mesa_set_vp_override(ctx, GL_FALSE);
219}
220
221
222static void GLAPIENTRY
223_mesa_Bitmap( GLsizei width, GLsizei height,
224              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
225              const GLubyte *bitmap )
226{
227   GET_CURRENT_CONTEXT(ctx);
228   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
229
230   if (width < 0 || height < 0) {
231      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
232      return;
233   }
234
235   if (!ctx->Current.RasterPosValid) {
236      return;    /* do nothing */
237   }
238
239   /* Note: this call does state validation */
240   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
241      /* the error code was recorded */
242      return;
243   }
244
245   if (ctx->RenderMode == GL_RENDER) {
246      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
247      if (width > 0 && height > 0) {
248         const GLfloat epsilon = 0.0001F;
249         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
250         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
251
252         if (ctx->Unpack.BufferObj->Name) {
253            /* unpack from PBO */
254            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
255                                           GL_COLOR_INDEX, GL_BITMAP,
256                                           (GLvoid *) bitmap)) {
257               _mesa_error(ctx, GL_INVALID_OPERATION,
258                           "glBitmap(invalid PBO access)");
259               return;
260            }
261            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
262               /* buffer is mapped - that's an error */
263               _mesa_error(ctx, GL_INVALID_OPERATION,
264                           "glBitmap(PBO is mapped)");
265               return;
266            }
267         }
268
269         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
270      }
271   }
272#if _HAVE_FULL_GL
273   else if (ctx->RenderMode == GL_FEEDBACK) {
274      FLUSH_CURRENT(ctx, 0);
275      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
276      _mesa_feedback_vertex( ctx,
277                             ctx->Current.RasterPos,
278                             ctx->Current.RasterColor,
279                             ctx->Current.RasterTexCoords[0] );
280   }
281   else {
282      ASSERT(ctx->RenderMode == GL_SELECT);
283      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
284   }
285#endif
286
287   /* update raster position */
288   ctx->Current.RasterPos[0] += xmove;
289   ctx->Current.RasterPos[1] += ymove;
290}
291
292
293void
294_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
295{
296   SET_Bitmap(disp, _mesa_Bitmap);
297   SET_CopyPixels(disp, _mesa_CopyPixels);
298   SET_DrawPixels(disp, _mesa_DrawPixels);
299}
300
301
302#endif /* FEATURE_drawpix */
303