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"
34 #include "mfeatures.h"
38 #include "glformats.h"
43 * Execute glDrawPixels
45 static void GLAPIENTRY
46 _mesa_DrawPixels( GLsizei width, GLsizei height,
47 GLenum format, GLenum type, const GLvoid *pixels )
50 GET_CURRENT_CONTEXT(ctx);
51 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
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 deest 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_bufferobj_mapped(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) {
189 static void GLAPIENTRY
190 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
193 GET_CURRENT_CONTEXT(ctx);
194 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
196 if (MESA_VERBOSE & VERBOSE_API)
198 "glCopyPixels(%d, %d, %d, %d, %s) // from %s to %s at %d, %d\n",
199 srcx, srcy, width, height,
200 _mesa_lookup_enum_by_nr(type),
201 _mesa_lookup_enum_by_nr(ctx->ReadBuffer->ColorReadBuffer),
202 _mesa_lookup_enum_by_nr(ctx->DrawBuffer->ColorDrawBuffer[0]),
203 IROUND(ctx->Current.RasterPos[0]),
204 IROUND(ctx->Current.RasterPos[1]));
206 if (width < 0 || height < 0) {
207 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
211 /* Note: more detailed 'type' checking is done by the
212 * _mesa_source/dest_buffer_exists() calls below. That's where we
213 * check if the stencil buffer exists, etc.
215 if (type != GL_COLOR &&
217 type != GL_STENCIL &&
218 type != GL_DEPTH_STENCIL) {
219 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
220 _mesa_lookup_enum_by_nr(type));
224 /* We're not using the current vertex program, and the driver may install
225 * it's own. Note: this may dirty some state.
227 _mesa_set_vp_override(ctx, GL_TRUE);
229 /* Note: this call does state validation */
230 if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
231 goto end; /* the error code was recorded */
234 /* Check read buffer's status (draw buffer was already checked) */
235 if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
236 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
237 "glCopyPixels(incomplete framebuffer)" );
241 if (_mesa_is_user_fbo(ctx->ReadBuffer) &&
242 ctx->ReadBuffer->Visual.samples > 0) {
243 _mesa_error(ctx, GL_INVALID_OPERATION,
244 "glCopyPixels(multisample FBO)");
248 if (!_mesa_source_buffer_exists(ctx, type) ||
249 !_mesa_dest_buffer_exists(ctx, type)) {
250 _mesa_error(ctx, GL_INVALID_OPERATION,
251 "glCopyPixels(missing source or dest buffer)");
255 if (ctx->RasterDiscard) {
259 if (!ctx->Current.RasterPosValid || width == 0 || height == 0) {
260 goto end; /* no-op, not an error */
263 if (ctx->RenderMode == GL_RENDER) {
264 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
265 if (width > 0 && height > 0) {
266 GLint destx = IROUND(ctx->Current.RasterPos[0]);
267 GLint desty = IROUND(ctx->Current.RasterPos[1]);
268 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
272 else if (ctx->RenderMode == GL_FEEDBACK) {
273 FLUSH_CURRENT( ctx, 0 );
274 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
275 _mesa_feedback_vertex( ctx,
276 ctx->Current.RasterPos,
277 ctx->Current.RasterColor,
278 ctx->Current.RasterTexCoords[0] );
281 ASSERT(ctx->RenderMode == GL_SELECT);
282 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
286 _mesa_set_vp_override(ctx, GL_FALSE);
288 if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
294 static void GLAPIENTRY
295 _mesa_Bitmap( GLsizei width, GLsizei height,
296 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
297 const GLubyte *bitmap )
299 GET_CURRENT_CONTEXT(ctx);
300 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
302 if (width < 0 || height < 0) {
303 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
307 if (!ctx->Current.RasterPosValid) {
308 return; /* do nothing */
311 /* Note: this call does state validation */
312 if (!_mesa_valid_to_render(ctx, "glBitmap")) {
313 /* the error code was recorded */
317 if (ctx->RasterDiscard)
320 if (ctx->RenderMode == GL_RENDER) {
321 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
322 if (width > 0 && height > 0) {
323 const GLfloat epsilon = 0.0001F;
324 GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
325 GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
327 if (_mesa_is_bufferobj(ctx->Unpack.BufferObj)) {
328 /* unpack from PBO */
329 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height,
330 1, GL_COLOR_INDEX, GL_BITMAP,
331 INT_MAX, (const GLvoid *) bitmap)) {
332 _mesa_error(ctx, GL_INVALID_OPERATION,
333 "glBitmap(invalid PBO access)");
336 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
337 /* buffer is mapped - that's an error */
338 _mesa_error(ctx, GL_INVALID_OPERATION,
339 "glBitmap(PBO is mapped)");
344 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
348 else if (ctx->RenderMode == GL_FEEDBACK) {
349 FLUSH_CURRENT(ctx, 0);
350 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
351 _mesa_feedback_vertex( ctx,
352 ctx->Current.RasterPos,
353 ctx->Current.RasterColor,
354 ctx->Current.RasterTexCoords[0] );
357 ASSERT(ctx->RenderMode == GL_SELECT);
358 /* 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) {
373 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
375 SET_Bitmap(disp, _mesa_Bitmap);
376 SET_CopyPixels(disp, _mesa_CopyPixels);
377 SET_DrawPixels(disp, _mesa_DrawPixels);