1/*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#include "glheader.h"
26#include "imports.h"
27#include "draw_validate.h"
28#include "bufferobj.h"
29#include "context.h"
30#include "drawpix.h"
31#include "enums.h"
32#include "feedback.h"
33#include "framebuffer.h"
34#include "image.h"
35#include "pbo.h"
36#include "state.h"
37#include "glformats.h"
38#include "fbobject.h"
39
40
41/*
42 * Execute glDrawPixels
43 */
44void GLAPIENTRY
45_mesa_DrawPixels( GLsizei width, GLsizei height,
46                  GLenum format, GLenum type, const GLvoid *pixels )
47{
48   GLenum err;
49   GET_CURRENT_CONTEXT(ctx);
50
51   FLUSH_VERTICES(ctx, 0);
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_enum_to_string(format),
57                  _mesa_enum_to_string(type),
58                  pixels,
59                  _mesa_enum_to_string(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   /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
80    * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
81    * Rectangles) on page 151 of the GL 3.0 specification:
82    *
83    *     "If format contains integer components, as shown in table 3.6, an
84    *      INVALID OPERATION error is generated."
85    *
86    * Since DrawPixels rendering would be merely undefined if not an error (due
87    * to a lack of defined mapping from integer data to gl_Color fragment shader
88    * input), NVIDIA's implementation also just returns this error despite
89    * exposing GL_EXT_texture_integer, just return an error regardless.
90    */
91   if (_mesa_is_enum_format_integer(format)) {
92      _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
93      goto end;
94   }
95
96   err = _mesa_error_check_format_and_type(ctx, format, type);
97   if (err != GL_NO_ERROR) {
98      _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
99                  _mesa_enum_to_string(format),
100                  _mesa_enum_to_string(type));
101      goto end;
102   }
103
104   /* do special format-related checks */
105   switch (format) {
106   case GL_STENCIL_INDEX:
107   case GL_DEPTH_COMPONENT:
108   case GL_DEPTH_STENCIL_EXT:
109      /* these buffers must exist */
110      if (!_mesa_dest_buffer_exists(ctx, format)) {
111         _mesa_error(ctx, GL_INVALID_OPERATION,
112                     "glDrawPixels(missing dest buffer)");
113         goto end;
114      }
115      break;
116   case GL_COLOR_INDEX:
117      if (ctx->PixelMaps.ItoR.Size == 0 ||
118          ctx->PixelMaps.ItoG.Size == 0 ||
119          ctx->PixelMaps.ItoB.Size == 0) {
120         _mesa_error(ctx, GL_INVALID_OPERATION,
121                "glDrawPixels(drawing color index pixels into RGB buffer)");
122         goto end;
123      }
124      break;
125   default:
126      /* for color formats it's not an error if the destination color
127       * buffer doesn't exist.
128       */
129      break;
130   }
131
132   if (ctx->RasterDiscard) {
133      goto end;
134   }
135
136   if (!ctx->Current.RasterPosValid) {
137      goto end;  /* no-op, not an error */
138   }
139
140   if (ctx->RenderMode == GL_RENDER) {
141      if (width > 0 && height > 0) {
142         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
143         GLint x = IROUND(ctx->Current.RasterPos[0]);
144         GLint y = IROUND(ctx->Current.RasterPos[1]);
145
146         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
147            /* unpack from PBO */
148            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
149                                           1, format, type, INT_MAX, pixels)) {
150               _mesa_error(ctx, GL_INVALID_OPERATION,
151                           "glDrawPixels(invalid PBO access)");
152               goto end;
153            }
154            if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
155               /* buffer is mapped - that's an error */
156               _mesa_error(ctx, GL_INVALID_OPERATION,
157                           "glDrawPixels(PBO is mapped)");
158               goto end;
159            }
160         }
161
162         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
163                                &ctx->Unpack, pixels);
164      }
165   }
166   else if (ctx->RenderMode == GL_FEEDBACK) {
167      /* Feedback the current raster pos info */
168      FLUSH_CURRENT( ctx, 0 );
169      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
170      _mesa_feedback_vertex( ctx,
171                             ctx->Current.RasterPos,
172                             ctx->Current.RasterColor,
173                             ctx->Current.RasterTexCoords[0] );
174   }
175   else {
176      assert(ctx->RenderMode == GL_SELECT);
177      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
178   }
179
180end:
181   _mesa_set_vp_override(ctx, GL_FALSE);
182
183   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
184      _mesa_flush(ctx);
185   }
186}
187
188
189void GLAPIENTRY
190_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
191                  GLenum type )
192{
193   GET_CURRENT_CONTEXT(ctx);
194
195   FLUSH_VERTICES(ctx, 0);
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_enum_to_string(type),
202                  _mesa_enum_to_string(ctx->ReadBuffer->ColorReadBuffer),
203                  _mesa_enum_to_string(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_enum_to_string(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 (_mesa_is_user_fbo(ctx->ReadBuffer) &&
243       ctx->ReadBuffer->Visual.samples > 0) {
244      _mesa_error(ctx, GL_INVALID_OPERATION,
245		  "glCopyPixels(multisample FBO)");
246      goto end;
247   }
248
249   if (!_mesa_source_buffer_exists(ctx, type) ||
250       !_mesa_dest_buffer_exists(ctx, type)) {
251      _mesa_error(ctx, GL_INVALID_OPERATION,
252                  "glCopyPixels(missing source or dest buffer)");
253      goto end;
254   }
255
256   if (ctx->RasterDiscard) {
257      goto end;
258   }
259
260   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
261      goto end; /* no-op, not an error */
262   }
263
264   if (ctx->RenderMode == GL_RENDER) {
265      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
266      if (width > 0 && height > 0) {
267         GLint destx = IROUND(ctx->Current.RasterPos[0]);
268         GLint desty = IROUND(ctx->Current.RasterPos[1]);
269         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
270                                 type );
271      }
272   }
273   else if (ctx->RenderMode == GL_FEEDBACK) {
274      FLUSH_CURRENT( ctx, 0 );
275      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_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
286end:
287   _mesa_set_vp_override(ctx, GL_FALSE);
288
289   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
290      _mesa_flush(ctx);
291   }
292}
293
294
295void GLAPIENTRY
296_mesa_Bitmap( GLsizei width, GLsizei height,
297              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
298              const GLubyte *bitmap )
299{
300   GET_CURRENT_CONTEXT(ctx);
301
302   FLUSH_VERTICES(ctx, 0);
303
304   if (width < 0 || height < 0) {
305      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
306      return;
307   }
308
309   if (!ctx->Current.RasterPosValid) {
310      return;    /* do nothing */
311   }
312
313   /* Note: this call does state validation */
314   if (!_mesa_valid_to_render(ctx, "glBitmap")) {
315      /* the error code was recorded */
316      return;
317   }
318
319   if (ctx->RasterDiscard)
320      return;
321
322   if (ctx->RenderMode == GL_RENDER) {
323      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
324      if (width > 0 && height > 0) {
325         const GLfloat epsilon = 0.0001F;
326         GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
327         GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
328
329         if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
330            /* unpack from PBO */
331            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
332                                           1, GL_COLOR_INDEX, GL_BITMAP,
333                                           INT_MAX, (const GLvoid *) bitmap)) {
334               _mesa_error(ctx, GL_INVALID_OPERATION,
335                           "glBitmap(invalid PBO access)");
336               return;
337            }
338            if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
339               /* buffer is mapped - that's an error */
340               _mesa_error(ctx, GL_INVALID_OPERATION,
341                           "glBitmap(PBO is mapped)");
342               return;
343            }
344         }
345
346         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
347      }
348   }
349   else if (ctx->RenderMode == GL_FEEDBACK) {
350      FLUSH_CURRENT(ctx, 0);
351      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
352      _mesa_feedback_vertex( ctx,
353                             ctx->Current.RasterPos,
354                             ctx->Current.RasterColor,
355                             ctx->Current.RasterTexCoords[0] );
356   }
357   else {
358      assert(ctx->RenderMode == GL_SELECT);
359      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
360   }
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