2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
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.
27 #include "bufferobj.h"
32 #include "framebuffer.h"
37 #include "glformats.h"
42 * Execute glDrawPixels
45 _mesa_DrawPixels( GLsizei width
, GLsizei height
,
46 GLenum format
, GLenum type
, const GLvoid
*pixels
)
49 GET_CURRENT_CONTEXT(ctx
);
51 FLUSH_VERTICES(ctx
, 0);
53 if (MESA_VERBOSE
& VERBOSE_API
)
54 _mesa_debug(ctx
, "glDrawPixels(%d, %d, %s, %s, %p) // to %s at %d, %d\n",
56 _mesa_lookup_enum_by_nr(format
),
57 _mesa_lookup_enum_by_nr(type
),
59 _mesa_lookup_enum_by_nr(ctx
->DrawBuffer
->ColorDrawBuffer
[0]),
60 IROUND(ctx
->Current
.RasterPos
[0]),
61 IROUND(ctx
->Current
.RasterPos
[1]));
64 if (width
< 0 || height
< 0) {
65 _mesa_error( ctx
, GL_INVALID_VALUE
, "glDrawPixels(width or height < 0)" );
69 /* We're not using the current vertex program, and the driver may install
70 * its own. Note: this may dirty some state.
72 _mesa_set_vp_override(ctx
, GL_TRUE
);
74 /* Note: this call does state validation */
75 if (!_mesa_valid_to_render(ctx
, "glDrawPixels")) {
76 goto end
; /* the error code was recorded */
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:
83 * "If format contains integer components, as shown in table 3.6, an
84 * INVALID OPERATION error is generated."
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.
91 if (_mesa_is_enum_format_integer(format
)) {
92 _mesa_error(ctx
, GL_INVALID_OPERATION
, "glDrawPixels(integer format)");
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_lookup_enum_by_nr(format
),
100 _mesa_lookup_enum_by_nr(type
));
104 /* do special format-related checks */
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)");
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)");
126 /* for color formats it's not an error if the destination color
127 * buffer doesn't exist.
132 if (ctx
->RasterDiscard
) {
136 if (!ctx
->Current
.RasterPosValid
) {
137 goto end
; /* no-op, not an error */
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]);
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)");
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)");
162 ctx
->Driver
.DrawPixels(ctx
, x
, y
, width
, height
, format
, type
,
163 &ctx
->Unpack
, pixels
);
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] );
176 ASSERT(ctx
->RenderMode
== GL_SELECT
);
177 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
181 _mesa_set_vp_override(ctx
, GL_FALSE
);
183 if (MESA_DEBUG_FLAGS
& DEBUG_ALWAYS_FLUSH
) {
190 _mesa_CopyPixels( GLint srcx
, GLint srcy
, GLsizei width
, GLsizei height
,
193 GET_CURRENT_CONTEXT(ctx
);
195 FLUSH_VERTICES(ctx
, 0);
197 if (MESA_VERBOSE
& VERBOSE_API
)
199 "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
200 srcx
, srcy
, width
, height
,
201 _mesa_lookup_enum_by_nr(type
),
202 _mesa_lookup_enum_by_nr(ctx
->ReadBuffer
->ColorReadBuffer
),
203 _mesa_lookup_enum_by_nr(ctx
->DrawBuffer
->ColorDrawBuffer
[0]),
204 IROUND(ctx
->Current
.RasterPos
[0]),
205 IROUND(ctx
->Current
.RasterPos
[1]));
207 if (width
< 0 || height
< 0) {
208 _mesa_error(ctx
, GL_INVALID_VALUE
, "glCopyPixels(width or height < 0)");
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.
216 if (type
!= GL_COLOR
&&
218 type
!= GL_STENCIL
&&
219 type
!= GL_DEPTH_STENCIL
) {
220 _mesa_error(ctx
, GL_INVALID_ENUM
, "glCopyPixels(type=%s)",
221 _mesa_lookup_enum_by_nr(type
));
225 /* We're not using the current vertex program, and the driver may install
226 * it's own. Note: this may dirty some state.
228 _mesa_set_vp_override(ctx
, GL_TRUE
);
230 /* Note: this call does state validation */
231 if (!_mesa_valid_to_render(ctx
, "glCopyPixels")) {
232 goto end
; /* the error code was recorded */
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)" );
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)");
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)");
256 if (ctx
->RasterDiscard
) {
260 if (!ctx
->Current
.RasterPosValid
|| width
== 0 || height
== 0) {
261 goto end
; /* no-op, not an error */
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
,
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] );
282 ASSERT(ctx
->RenderMode
== GL_SELECT
);
283 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
287 _mesa_set_vp_override(ctx
, GL_FALSE
);
289 if (MESA_DEBUG_FLAGS
& DEBUG_ALWAYS_FLUSH
) {
296 _mesa_Bitmap( GLsizei width
, GLsizei height
,
297 GLfloat xorig
, GLfloat yorig
, GLfloat xmove
, GLfloat ymove
,
298 const GLubyte
*bitmap
)
300 GET_CURRENT_CONTEXT(ctx
);
302 FLUSH_VERTICES(ctx
, 0);
304 if (width
< 0 || height
< 0) {
305 _mesa_error( ctx
, GL_INVALID_VALUE
, "glBitmap(width or height < 0)" );
309 if (!ctx
->Current
.RasterPosValid
) {
310 return; /* do nothing */
313 /* Note: this call does state validation */
314 if (!_mesa_valid_to_render(ctx
, "glBitmap")) {
315 /* the error code was recorded */
319 if (ctx
->RasterDiscard
)
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
);
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)");
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)");
346 ctx
->Driver
.Bitmap( ctx
, x
, y
, width
, height
, &ctx
->Unpack
, bitmap
);
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] );
358 ASSERT(ctx
->RenderMode
== GL_SELECT
);
359 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
362 /* update raster position */
363 ctx
->Current
.RasterPos
[0] += xmove
;
364 ctx
->Current
.RasterPos
[1] += ymove
;
366 if (MESA_DEBUG_FLAGS
& DEBUG_ALWAYS_FLUSH
) {