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 "draw_validate.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 "pbo.h"
35#include "pixel.h"
36#include "state.h"
37#include "glformats.h"
38#include "fbobject.h"
39#include "util/u_math.h"
40#include "util/rounding.h"
41
42
43/*
44 * Execute glDrawPixels
45 */
46void GLAPIENTRY
47_mesa_DrawPixels( GLsizei width, GLsizei height,
48                  GLenum format, GLenum type, const GLvoid *pixels )
49{
50   GLenum err;
51   GET_CURRENT_CONTEXT(ctx);
52
53   FLUSH_VERTICES(ctx, 0, 0);
54
55   if (MESA_VERBOSE & VERBOSE_API)
56      _mesa_debug(ctx, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %ld, %ld\n",
57                  width, height,
58                  _mesa_enum_to_string(format),
59                  _mesa_enum_to_string(type),
60                  pixels,
61                  _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
62                  lroundf(ctx->Current.RasterPos[0]),
63                  lroundf(ctx->Current.RasterPos[1]));
64
65
66   if (width < 0 || height < 0) {
67      _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0)" );
68      return;
69   }
70
71   /* We're not using the current vertex program, and the driver may install
72    * its own.  Note: this may dirty some state.
73    */
74   _mesa_set_vp_override(ctx, GL_TRUE);
75
76   _mesa_update_pixel(ctx);
77
78   if (ctx->NewState)
79      _mesa_update_state(ctx);
80
81   if (!ctx->DrawPixValid) {
82      _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels");
83      goto end;
84   }
85
86   /* GL 3.0 introduced a new restriction on glDrawPixels() over what was in
87    * GL_EXT_texture_integer.  From section 3.7.4 ("Rasterization of Pixel
88    * Rectangles) on page 151 of the GL 3.0 specification:
89    *
90    *     "If format contains integer components, as shown in table 3.6, an
91    *      INVALID OPERATION error is generated."
92    *
93    * Since DrawPixels rendering would be merely undefined if not an error (due
94    * to a lack of defined mapping from integer data to gl_Color fragment shader
95    * input), NVIDIA's implementation also just returns this error despite
96    * exposing GL_EXT_texture_integer, just return an error regardless.
97    */
98   if (_mesa_is_enum_format_integer(format)) {
99      _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(integer format)");
100      goto end;
101   }
102
103   err = _mesa_error_check_format_and_type(ctx, format, type);
104   if (err != GL_NO_ERROR) {
105      _mesa_error(ctx, err, "glDrawPixels(invalid format %s and/or type %s)",
106                  _mesa_enum_to_string(format),
107                  _mesa_enum_to_string(type));
108      goto end;
109   }
110
111   /* do special format-related checks */
112   switch (format) {
113   case GL_STENCIL_INDEX:
114   case GL_DEPTH_COMPONENT:
115   case GL_DEPTH_STENCIL_EXT:
116      /* these buffers must exist */
117      if (!_mesa_dest_buffer_exists(ctx, format)) {
118         _mesa_error(ctx, GL_INVALID_OPERATION,
119                     "glDrawPixels(missing dest buffer)");
120         goto end;
121      }
122      break;
123   case GL_COLOR_INDEX:
124      if (ctx->PixelMaps.ItoR.Size == 0 ||
125          ctx->PixelMaps.ItoG.Size == 0 ||
126          ctx->PixelMaps.ItoB.Size == 0) {
127         _mesa_error(ctx, GL_INVALID_OPERATION,
128                "glDrawPixels(drawing color index pixels into RGB buffer)");
129         goto end;
130      }
131      break;
132   default:
133      /* for color formats it's not an error if the destination color
134       * buffer doesn't exist.
135       */
136      break;
137   }
138
139   if (ctx->RasterDiscard) {
140      goto end;
141   }
142
143   if (!ctx->Current.RasterPosValid) {
144      goto end;  /* no-op, not an error */
145   }
146
147   if (ctx->RenderMode == GL_RENDER) {
148      if (width > 0 && height > 0) {
149         /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
150         GLint x = lroundf(ctx->Current.RasterPos[0]);
151         GLint y = lroundf(ctx->Current.RasterPos[1]);
152
153         if (ctx->Unpack.BufferObj) {
154            /* unpack from PBO */
155            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
156                                           1, format, type, INT_MAX, pixels)) {
157               _mesa_error(ctx, GL_INVALID_OPERATION,
158                           "glDrawPixels(invalid PBO access)");
159               goto end;
160            }
161            if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
162               /* buffer is mapped - that's an error */
163               _mesa_error(ctx, GL_INVALID_OPERATION,
164                           "glDrawPixels(PBO is mapped)");
165               goto end;
166            }
167         }
168
169         ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
170                                &ctx->Unpack, pixels);
171      }
172   }
173   else if (ctx->RenderMode == GL_FEEDBACK) {
174      /* Feedback the current raster pos info */
175      FLUSH_CURRENT( ctx, 0 );
176      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
177      _mesa_feedback_vertex( ctx,
178                             ctx->Current.RasterPos,
179                             ctx->Current.RasterColor,
180                             ctx->Current.RasterTexCoords[0] );
181   }
182   else {
183      assert(ctx->RenderMode == GL_SELECT);
184      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
185   }
186
187end:
188   _mesa_set_vp_override(ctx, GL_FALSE);
189
190   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
191      _mesa_flush(ctx);
192   }
193}
194
195
196void GLAPIENTRY
197_mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
198                  GLenum type )
199{
200   GET_CURRENT_CONTEXT(ctx);
201
202   FLUSH_VERTICES(ctx, 0, 0);
203
204   if (MESA_VERBOSE & VERBOSE_API)
205      _mesa_debug(ctx,
206                  "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %ld, %ld\n",
207                  srcx, srcy, width, height,
208                  _mesa_enum_to_string(type),
209                  _mesa_enum_to_string(ctx->ReadBuffer->ColorReadBuffer),
210                  _mesa_enum_to_string(ctx->DrawBuffer->ColorDrawBuffer[0]),
211                  lroundf(ctx->Current.RasterPos[0]),
212                  lroundf(ctx->Current.RasterPos[1]));
213
214   if (width < 0 || height < 0) {
215      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
216      return;
217   }
218
219   /* Note: more detailed 'type' checking is done by the
220    * _mesa_source/dest_buffer_exists() calls below.  That's where we
221    * check if the stencil buffer exists, etc.
222    */
223   if (type != GL_COLOR &&
224       type != GL_DEPTH &&
225       type != GL_STENCIL &&
226       type != GL_DEPTH_STENCIL &&
227       type != GL_DEPTH_STENCIL_TO_RGBA_NV &&
228       type != GL_DEPTH_STENCIL_TO_BGRA_NV) {
229      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
230                  _mesa_enum_to_string(type));
231      return;
232   }
233
234   /* Return GL_INVALID_ENUM if the relevant extension is not enabled */
235   if ((type == GL_DEPTH_STENCIL_TO_RGBA_NV || type == GL_DEPTH_STENCIL_TO_BGRA_NV) &&
236       !ctx->Extensions.NV_copy_depth_to_color) {
237      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
238                  _mesa_enum_to_string(type));
239      return;
240   }
241
242   /* We're not using the current vertex program, and the driver may install
243    * it's own.  Note: this may dirty some state.
244    */
245   _mesa_set_vp_override(ctx, GL_TRUE);
246
247   _mesa_update_pixel(ctx);
248
249   if (ctx->NewState)
250      _mesa_update_state(ctx);
251
252   if (!ctx->DrawPixValid) {
253      _mesa_error(ctx, GL_INVALID_OPERATION, "glCopyPixels");
254      goto end;
255   }
256
257   /* Check read buffer's status (draw buffer was already checked) */
258   if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
259      _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
260                  "glCopyPixels(incomplete framebuffer)" );
261      goto end;
262   }
263
264   if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
265       ctx->ReadBuffer->Visual.samples > 0) {
266      _mesa_error(ctx, GL_INVALID_OPERATION,
267		  "glCopyPixels(multisample FBO)");
268      goto end;
269   }
270
271   if (!_mesa_source_buffer_exists(ctx, type) ||
272       !_mesa_dest_buffer_exists(ctx, type)) {
273      _mesa_error(ctx, GL_INVALID_OPERATION,
274                  "glCopyPixels(missing source or dest buffer)");
275      goto end;
276   }
277
278   if (ctx->RasterDiscard) {
279      goto end;
280   }
281
282   if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
283      goto end; /* no-op, not an error */
284   }
285
286   if (ctx->RenderMode == GL_RENDER) {
287      /* Round to satisfy conformance tests (matches SGI's OpenGL) */
288      if (width > 0 && height > 0) {
289         GLint destx = lroundf(ctx->Current.RasterPos[0]);
290         GLint desty = lroundf(ctx->Current.RasterPos[1]);
291         ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
292                                 type );
293      }
294   }
295   else if (ctx->RenderMode == GL_FEEDBACK) {
296      FLUSH_CURRENT( ctx, 0 );
297      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
298      _mesa_feedback_vertex( ctx,
299                             ctx->Current.RasterPos,
300                             ctx->Current.RasterColor,
301                             ctx->Current.RasterTexCoords[0] );
302   }
303   else {
304      assert(ctx->RenderMode == GL_SELECT);
305      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
306   }
307
308end:
309   _mesa_set_vp_override(ctx, GL_FALSE);
310
311   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
312      _mesa_flush(ctx);
313   }
314}
315
316
317void GLAPIENTRY
318_mesa_Bitmap( GLsizei width, GLsizei height,
319              GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
320              const GLubyte *bitmap )
321{
322   GET_CURRENT_CONTEXT(ctx);
323
324   FLUSH_VERTICES(ctx, 0, 0);
325
326   if (width < 0 || height < 0) {
327      _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
328      return;
329   }
330
331   if (!ctx->Current.RasterPosValid) {
332      return;    /* do nothing */
333   }
334
335   _mesa_update_pixel(ctx);
336
337   if (ctx->NewState)
338      _mesa_update_state(ctx);
339
340   if (!ctx->DrawPixValid) {
341      _mesa_error(ctx, GL_INVALID_OPERATION, "glBitmap");
342      return;
343   }
344
345   if (ctx->RasterDiscard)
346      return;
347
348   if (ctx->RenderMode == GL_RENDER) {
349      /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
350      if (width > 0 && height > 0) {
351         const GLfloat epsilon = 0.0001F;
352         GLint x = util_ifloor(ctx->Current.RasterPos[0] + epsilon - xorig);
353         GLint y = util_ifloor(ctx->Current.RasterPos[1] + epsilon - yorig);
354
355         if (ctx->Unpack.BufferObj) {
356            /* unpack from PBO */
357            if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
358                                           1, GL_COLOR_INDEX, GL_BITMAP,
359                                           INT_MAX, (const GLvoid *) bitmap)) {
360               _mesa_error(ctx, GL_INVALID_OPERATION,
361                           "glBitmap(invalid PBO access)");
362               return;
363            }
364            if (_mesa_check_disallowed_mapping(ctx->Unpack.BufferObj)) {
365               /* buffer is mapped - that's an error */
366               _mesa_error(ctx, GL_INVALID_OPERATION,
367                           "glBitmap(PBO is mapped)");
368               return;
369            }
370         }
371
372         ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
373      }
374   }
375   else if (ctx->RenderMode == GL_FEEDBACK) {
376      FLUSH_CURRENT(ctx, 0);
377      _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
378      _mesa_feedback_vertex( ctx,
379                             ctx->Current.RasterPos,
380                             ctx->Current.RasterColor,
381                             ctx->Current.RasterTexCoords[0] );
382   }
383   else {
384      assert(ctx->RenderMode == GL_SELECT);
385      /* Do nothing.  See OpenGL Spec, Appendix B, Corollary 6. */
386   }
387
388   /* update raster position */
389   ctx->Current.RasterPos[0] += xmove;
390   ctx->Current.RasterPos[1] += ymove;
391   ctx->PopAttribState |= GL_CURRENT_BIT;
392
393   if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
394      _mesa_flush(ctx);
395   }
396}
397