drawpix.c revision db61b9ce39bccc43140357652ceb78baaf2aea44 
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 "readpix.h"
35#include "state.h"
36#include "dispatch.h"
37
38
39#if FEATURE_drawpix
40
41
42/*
43 * Execute glDrawPixels
44 */
45static void GLAPIENTRY
46_mesa_DrawPixels( GLsizei width, GLsizei height,
47                  GLenum format, GLenum type, const GLvoid *pixels )
48{
49   GET_CURRENT_CONTEXT(ctx);
50   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
51
52   if (width < 0 || height < 0) {
53      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
54      return;
55   }
56
57   /* We're not using the current vertex program, and the driver may install
58    * its own.  Note: this may dirty some state.
59    */
60   _mesa_set_vp_override(ctx, GL_TRUE);
61
62   /* Note: this call does state validation */
63   if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
64      goto end;      /* the error code was recorded */
65   }
66
67   if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
68      goto end;      /* the error code was recorded */
69   }
70
71   if (!ctx->Current.RasterPosValid) {
72      goto end;  /* no-op, not an error */
73   }
74
75   if (ctx->RenderMode == GL_RENDER) {
76      if (width > 0 && height > 0) {
77         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
78         GLint x = IROUND(ctx->Current.RasterPos[0]);
79         GLint y = IROUND(ctx->Current.RasterPos[1]);
80
81         if (ctx->Unpack.BufferObj->Name) {
82            /* unpack from PBO */
83            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
84                                           format, type, pixels)) {
85               _mesa_error(ctx, GL_INVALID_OPERATION,
86                           "glDrawPixels(invalid PBO access)");
87               goto end;
88            }
89            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
90               /* buffer is mapped - that's an error */
91               _mesa_error(ctx, GL_INVALID_OPERATION,
92                           "glDrawPixels(PBO is mapped)");
93               goto end;
94            }
95         }
96
97         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
98                                &ctx->Unpack, pixels);
99      }
100   }
101   else if (ctx->RenderMode == GL_FEEDBACK) {
102      /* Feedback the current raster pos info */
103      FLUSH_CURRENT( ctx, 0 );
104      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
105      _mesa_feedback_vertex( ctx,
106                             ctx->Current.RasterPos,
107                             ctx->Current.RasterColor,
108                             ctx->Current.RasterTexCoords[0] );
109   }
110   else {
111      ASSERT(ctx->RenderMode == GL_SELECT);
112      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
113   }
114
115end:
116   _mesa_set_vp_override(ctx, GL_FALSE);
117}
118
119
120static void GLAPIENTRY
121_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
122                  GLenum type )
123{
124   GET_CURRENT_CONTEXT(ctx);
125   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
126
127   if (width < 0 || height < 0) {
128      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
129      return;
130   }
131
132   /* Note: more detailed 'type' checking is done by the
133    * _mesa_source/dest_buffer_exists() calls below.  That's where we
134    * check if the stencil buffer exists, etc.
135    */
136   if (type != GL_COLOR &&
137       type != GL_DEPTH &&
138       type != GL_STENCIL &&
139       type != GL_DEPTH_STENCIL) {
140      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
141                  _mesa_lookup_enum_by_nr(type));
142      return;
143   }
144
145   /* We're not using the current vertex program, and the driver may install
146    * it's own.  Note: this may dirty some state.
147    */
148   _mesa_set_vp_override(ctx, GL_TRUE);
149
150   /* Note: this call does state validation */
151   if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
152      goto end;      /* the error code was recorded */
153   }
154
155   /* Check read buffer's status (draw buffer was already checked) */
156   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
157      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
158                  "glCopyPixels(incomplete framebuffer)" );
159      goto end;
160   }
161
162   if (!_mesa_source_buffer_exists(ctx, type) ||
163       !_mesa_dest_buffer_exists(ctx, type)) {
164      _mesa_error(ctx, GL_INVALID_OPERATION,
165                  "glCopyPixels(missing source or dest buffer)");
166      goto end;
167   }
168
169   if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
170      goto end; /* no-op, not an error */
171   }
172
173   if (ctx->RenderMode == GL_RENDER) {
174      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
175      if (width > 0 && height > 0) {
176         GLint destx = IROUND(ctx->Current.RasterPos[0]);
177         GLint desty = IROUND(ctx->Current.RasterPos[1]);
178         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
179                                 type );
180      }
181   }
182   else if (ctx->RenderMode == GL_FEEDBACK) {
183      FLUSH_CURRENT( ctx, 0 );
184      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
185      _mesa_feedback_vertex( ctx,
186                             ctx->Current.RasterPos,
187                             ctx->Current.RasterColor,
188                             ctx->Current.RasterTexCoords[0] );
189   }
190   else {
191      ASSERT(ctx->RenderMode == GL_SELECT);
192      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
193   }
194
195end:
196   _mesa_set_vp_override(ctx, GL_FALSE);
197}
198
199
200static void GLAPIENTRY
201_mesa_Bitmap( GLsizei width, GLsizei height,
202              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
203              const GLubyte *bitmap )
204{
205   GET_CURRENT_CONTEXT(ctx);
206   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
207
208   if (width < 0 || height < 0) {
209      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
210      return;
211   }
212
213   if (!ctx->Current.RasterPosValid) {
214      return;    /* do nothing */
215   }
216
217   /* Note: this call does state validation */
218   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
219      /* the error code was recorded */
220      return;
221   }
222
223   if (ctx->RenderMode == GL_RENDER) {
224      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
225      if (width > 0 && height > 0) {
226         const GLfloat epsilon = 0.0001F;
227         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
228         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
229
230         if (ctx->Unpack.BufferObj->Name) {
231            /* unpack from PBO */
232            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
233                                           GL_COLOR_INDEX, GL_BITMAP,
234                                           (GLvoid *) bitmap)) {
235               _mesa_error(ctx, GL_INVALID_OPERATION,
236                           "glBitmap(invalid PBO access)");
237               return;
238            }
239            if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
240               /* buffer is mapped - that's an error */
241               _mesa_error(ctx, GL_INVALID_OPERATION,
242                           "glBitmap(PBO is mapped)");
243               return;
244            }
245         }
246
247         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
248      }
249   }
250#if _HAVE_FULL_GL
251   else if (ctx->RenderMode == GL_FEEDBACK) {
252      FLUSH_CURRENT(ctx, 0);
253      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
254      _mesa_feedback_vertex( ctx,
255                             ctx->Current.RasterPos,
256                             ctx->Current.RasterColor,
257                             ctx->Current.RasterTexCoords[0] );
258   }
259   else {
260      ASSERT(ctx->RenderMode == GL_SELECT);
261      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
262   }
263#endif
264
265   /* update raster position */
266   ctx->Current.RasterPos[0] += xmove;
267   ctx->Current.RasterPos[1] += ymove;
268}
269
270
271void
272_mesa_init_drawpix_dispatch(struct _glapi_table *disp)
273{
274   SET_Bitmap(disp, _mesa_Bitmap);
275   SET_CopyPixels(disp, _mesa_CopyPixels);
276   SET_DrawPixels(disp, _mesa_DrawPixels);
277}
278
279
280#endif /* FEATURE_drawpix */
281