2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
27 #include "bufferobj.h"
32 #include "framebuffer.h"
36 #include "glapi/dispatch.h"
43 * If a fragment program is enabled, check that it's valid.
44 * \return GL_TRUE if valid, GL_FALSE otherwise
47 valid_fragment_program(GLcontext
*ctx
)
49 return !(ctx
->FragmentProgram
.Enabled
&& !ctx
->FragmentProgram
._Enabled
);
54 * Execute glDrawPixels
56 static void GLAPIENTRY
57 _mesa_DrawPixels( GLsizei width
, GLsizei height
,
58 GLenum format
, GLenum type
, const GLvoid
*pixels
)
60 GET_CURRENT_CONTEXT(ctx
);
61 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
63 if (width
< 0 || height
< 0) {
64 _mesa_error( ctx
, GL_INVALID_VALUE
, "glDrawPixels(width or height < 0" );
68 /* We're not using the current vertex program, and the driver may install
71 _mesa_set_vp_override(ctx
, GL_TRUE
);
74 _mesa_update_state(ctx
);
77 if (!valid_fragment_program(ctx
)) {
78 _mesa_error(ctx
, GL_INVALID_OPERATION
,
79 "glDrawPixels (invalid fragment program)");
83 if (_mesa_error_check_format_type(ctx
, format
, type
, GL_TRUE
)) {
84 /* the error was already recorded */
88 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
89 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
90 "glDrawPixels(incomplete framebuffer)" );
94 if (!ctx
->Current
.RasterPosValid
) {
95 goto end
; /* no-op, not an error */
98 if (ctx
->RenderMode
== GL_RENDER
) {
99 if (width
> 0 && height
> 0) {
100 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
101 GLint x
= IROUND(ctx
->Current
.RasterPos
[0]);
102 GLint y
= IROUND(ctx
->Current
.RasterPos
[1]);
104 if (ctx
->Unpack
.BufferObj
->Name
) {
105 /* unpack from PBO */
106 if (!_mesa_validate_pbo_access(2, &ctx
->Unpack
, width
, height
, 1,
107 format
, type
, pixels
)) {
108 _mesa_error(ctx
, GL_INVALID_OPERATION
,
109 "glDrawPixels(invalid PBO access)");
112 if (_mesa_bufferobj_mapped(ctx
->Unpack
.BufferObj
)) {
113 /* buffer is mapped - that's an error */
114 _mesa_error(ctx
, GL_INVALID_OPERATION
,
115 "glDrawPixels(PBO is mapped)");
120 ctx
->Driver
.DrawPixels(ctx
, x
, y
, width
, height
, format
, type
,
121 &ctx
->Unpack
, pixels
);
124 else if (ctx
->RenderMode
== GL_FEEDBACK
) {
125 /* Feedback the current raster pos info */
126 FLUSH_CURRENT( ctx
, 0 );
127 _mesa_feedback_token( ctx
, (GLfloat
) (GLint
) GL_DRAW_PIXEL_TOKEN
);
128 _mesa_feedback_vertex( ctx
,
129 ctx
->Current
.RasterPos
,
130 ctx
->Current
.RasterColor
,
131 ctx
->Current
.RasterIndex
,
132 ctx
->Current
.RasterTexCoords
[0] );
135 ASSERT(ctx
->RenderMode
== GL_SELECT
);
136 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
140 _mesa_set_vp_override(ctx
, GL_FALSE
);
144 static void GLAPIENTRY
145 _mesa_CopyPixels( GLint srcx
, GLint srcy
, GLsizei width
, GLsizei height
,
148 GET_CURRENT_CONTEXT(ctx
);
149 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
151 if (width
< 0 || height
< 0) {
152 _mesa_error(ctx
, GL_INVALID_VALUE
, "glCopyPixels(width or height < 0)");
156 /* Note: more detailed 'type' checking is done by the
157 * _mesa_source/dest_buffer_exists() calls below. That's where we
158 * check if the stencil buffer exists, etc.
160 if (type
!= GL_COLOR
&&
162 type
!= GL_STENCIL
&&
163 type
!= GL_DEPTH_STENCIL
) {
164 _mesa_error(ctx
, GL_INVALID_ENUM
, "glCopyPixels(type=%s)",
165 _mesa_lookup_enum_by_nr(type
));
169 /* We're not using the current vertex program, and the driver may install
172 _mesa_set_vp_override(ctx
, GL_TRUE
);
175 _mesa_update_state(ctx
);
178 if (!valid_fragment_program(ctx
)) {
179 _mesa_error(ctx
, GL_INVALID_OPERATION
,
180 "glCopyPixels (invalid fragment program)");
184 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
||
185 ctx
->ReadBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
186 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
187 "glCopyPixels(incomplete framebuffer)" );
191 if (!_mesa_source_buffer_exists(ctx
, type
) ||
192 !_mesa_dest_buffer_exists(ctx
, type
)) {
193 _mesa_error(ctx
, GL_INVALID_OPERATION
,
194 "glCopyPixels(missing source or dest buffer)");
198 if (!ctx
->Current
.RasterPosValid
|| width
==0 || height
== 0) {
199 goto end
; /* no-op, not an error */
202 if (ctx
->RenderMode
== GL_RENDER
) {
203 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
204 if (width
> 0 && height
> 0) {
205 GLint destx
= IROUND(ctx
->Current
.RasterPos
[0]);
206 GLint desty
= IROUND(ctx
->Current
.RasterPos
[1]);
207 ctx
->Driver
.CopyPixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
,
211 else if (ctx
->RenderMode
== GL_FEEDBACK
) {
212 FLUSH_CURRENT( ctx
, 0 );
213 _mesa_feedback_token( ctx
, (GLfloat
) (GLint
) GL_COPY_PIXEL_TOKEN
);
214 _mesa_feedback_vertex( ctx
,
215 ctx
->Current
.RasterPos
,
216 ctx
->Current
.RasterColor
,
217 ctx
->Current
.RasterIndex
,
218 ctx
->Current
.RasterTexCoords
[0] );
221 ASSERT(ctx
->RenderMode
== GL_SELECT
);
222 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
226 _mesa_set_vp_override(ctx
, GL_FALSE
);
230 static void GLAPIENTRY
231 _mesa_Bitmap( GLsizei width
, GLsizei height
,
232 GLfloat xorig
, GLfloat yorig
, GLfloat xmove
, GLfloat ymove
,
233 const GLubyte
*bitmap
)
235 GET_CURRENT_CONTEXT(ctx
);
236 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
238 if (width
< 0 || height
< 0) {
239 _mesa_error( ctx
, GL_INVALID_VALUE
, "glBitmap(width or height < 0)" );
243 if (!ctx
->Current
.RasterPosValid
) {
244 return; /* do nothing */
248 _mesa_update_state(ctx
);
251 if (!valid_fragment_program(ctx
)) {
252 _mesa_error(ctx
, GL_INVALID_OPERATION
,
253 "glBitmap (invalid fragment program)");
257 if (ctx
->DrawBuffer
->_Status
!= GL_FRAMEBUFFER_COMPLETE_EXT
) {
258 _mesa_error(ctx
, GL_INVALID_FRAMEBUFFER_OPERATION_EXT
,
259 "glBitmap(incomplete framebuffer)");
263 if (ctx
->RenderMode
== GL_RENDER
) {
264 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
265 if (width
> 0 && height
> 0) {
266 const GLfloat epsilon
= 0.0001F
;
267 GLint x
= IFLOOR(ctx
->Current
.RasterPos
[0] + epsilon
- xorig
);
268 GLint y
= IFLOOR(ctx
->Current
.RasterPos
[1] + epsilon
- yorig
);
270 if (ctx
->Unpack
.BufferObj
->Name
) {
271 /* unpack from PBO */
272 if (!_mesa_validate_pbo_access(2, &ctx
->Unpack
, width
, height
, 1,
273 GL_COLOR_INDEX
, GL_BITMAP
,
274 (GLvoid
*) bitmap
)) {
275 _mesa_error(ctx
, GL_INVALID_OPERATION
,
276 "glBitmap(invalid PBO access)");
279 if (_mesa_bufferobj_mapped(ctx
->Unpack
.BufferObj
)) {
280 /* buffer is mapped - that's an error */
281 _mesa_error(ctx
, GL_INVALID_OPERATION
,
282 "glBitmap(PBO is mapped)");
287 ctx
->Driver
.Bitmap( ctx
, x
, y
, width
, height
, &ctx
->Unpack
, bitmap
);
291 else if (ctx
->RenderMode
== GL_FEEDBACK
) {
292 FLUSH_CURRENT(ctx
, 0);
293 _mesa_feedback_token( ctx
, (GLfloat
) (GLint
) GL_BITMAP_TOKEN
);
294 _mesa_feedback_vertex( ctx
,
295 ctx
->Current
.RasterPos
,
296 ctx
->Current
.RasterColor
,
297 ctx
->Current
.RasterIndex
,
298 ctx
->Current
.RasterTexCoords
[0] );
301 ASSERT(ctx
->RenderMode
== GL_SELECT
);
302 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
306 /* update raster position */
307 ctx
->Current
.RasterPos
[0] += xmove
;
308 ctx
->Current
.RasterPos
[1] += ymove
;
313 _mesa_init_drawpix_dispatch(struct _glapi_table
*disp
)
315 SET_Bitmap(disp
, _mesa_Bitmap
);
316 SET_CopyPixels(disp
, _mesa_CopyPixels
);
317 SET_DrawPixels(disp
, _mesa_DrawPixels
);
321 #endif /* FEATURE_drawpix */