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"
40 * If a fragment program is enabled, check that it's valid.
41 * \return GL_TRUE if valid, GL_FALSE otherwise
44 valid_fragment_program(GLcontext *ctx)
46 return !(ctx->FragmentProgram.Enabled && !ctx->FragmentProgram._Enabled);
53 * Execute glDrawPixels
56 _mesa_DrawPixels( GLsizei width, GLsizei height,
57 GLenum format, GLenum type, const GLvoid *pixels )
59 GET_CURRENT_CONTEXT(ctx);
60 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
62 if (width < 0 || height < 0) {
63 _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
67 /* We're not using the current vertex program, and the driver may install
70 _mesa_set_vp_override(ctx, GL_TRUE);
73 _mesa_update_state(ctx);
76 if (!valid_fragment_program(ctx)) {
77 _mesa_error(ctx, GL_INVALID_OPERATION,
78 "glDrawPixels (invalid fragment program)");
82 if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
83 /* the error was already recorded */
87 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
88 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
89 "glDrawPixels(incomplete framebuffer)" );
93 if (!ctx->Current.RasterPosValid) {
94 goto end; /* no-op, not an error */
97 if (ctx->RenderMode == GL_RENDER) {
98 if (width > 0 && height > 0) {
99 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
100 GLint x = IROUND(ctx->Current.RasterPos[0]);
101 GLint y = IROUND(ctx->Current.RasterPos[1]);
103 if (ctx->Unpack.BufferObj->Name) {
104 /* unpack from PBO */
105 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
106 format, type, pixels)) {
107 _mesa_error(ctx, GL_INVALID_OPERATION,
108 "glDrawPixels(invalid PBO access)");
111 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
112 /* buffer is mapped - that's an error */
113 _mesa_error(ctx, GL_INVALID_OPERATION,
114 "glDrawPixels(PBO is mapped)");
119 ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
120 &ctx->Unpack, pixels);
123 else if (ctx->RenderMode == GL_FEEDBACK) {
124 /* Feedback the current raster pos info */
125 FLUSH_CURRENT( ctx, 0 );
126 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
127 _mesa_feedback_vertex( ctx,
128 ctx->Current.RasterPos,
129 ctx->Current.RasterColor,
130 ctx->Current.RasterIndex,
131 ctx->Current.RasterTexCoords[0] );
134 ASSERT(ctx->RenderMode == GL_SELECT);
135 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
139 _mesa_set_vp_override(ctx, GL_FALSE);
144 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
147 GET_CURRENT_CONTEXT(ctx);
148 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
150 if (width < 0 || height < 0) {
151 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
155 /* Note: more detailed 'type' checking is done by the
156 * _mesa_source/dest_buffer_exists() calls below. That's where we
157 * check if the stencil buffer exists, etc.
159 if (type != GL_COLOR &&
161 type != GL_STENCIL &&
162 type != GL_DEPTH_STENCIL) {
163 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
164 _mesa_lookup_enum_by_nr(type));
168 /* We're not using the current vertex program, and the driver may install
171 _mesa_set_vp_override(ctx, GL_TRUE);
174 _mesa_update_state(ctx);
177 if (!valid_fragment_program(ctx)) {
178 _mesa_error(ctx, GL_INVALID_OPERATION,
179 "glCopyPixels (invalid fragment program)");
183 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
184 ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
185 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
186 "glCopyPixels(incomplete framebuffer)" );
190 if (!_mesa_source_buffer_exists(ctx, type) ||
191 !_mesa_dest_buffer_exists(ctx, type)) {
192 _mesa_error(ctx, GL_INVALID_OPERATION,
193 "glCopyPixels(missing source or dest buffer)");
197 if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
198 goto end; /* no-op, not an error */
201 if (ctx->RenderMode == GL_RENDER) {
202 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
203 if (width > 0 && height > 0) {
204 GLint destx = IROUND(ctx->Current.RasterPos[0]);
205 GLint desty = IROUND(ctx->Current.RasterPos[1]);
206 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
210 else if (ctx->RenderMode == GL_FEEDBACK) {
211 FLUSH_CURRENT( ctx, 0 );
212 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
213 _mesa_feedback_vertex( ctx,
214 ctx->Current.RasterPos,
215 ctx->Current.RasterColor,
216 ctx->Current.RasterIndex,
217 ctx->Current.RasterTexCoords[0] );
220 ASSERT(ctx->RenderMode == GL_SELECT);
221 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
225 _mesa_set_vp_override(ctx, GL_FALSE);
228 #endif /* _HAVE_FULL_GL */
233 _mesa_Bitmap( GLsizei width, GLsizei height,
234 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
235 const GLubyte *bitmap )
237 GET_CURRENT_CONTEXT(ctx);
238 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
240 if (width < 0 || height < 0) {
241 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
245 if (!ctx->Current.RasterPosValid) {
246 return; /* do nothing */
250 _mesa_update_state(ctx);
253 if (!valid_fragment_program(ctx)) {
254 _mesa_error(ctx, GL_INVALID_OPERATION,
255 "glBitmap (invalid fragment program)");
259 if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
260 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
261 "glBitmap(incomplete framebuffer)");
265 if (ctx->RenderMode == GL_RENDER) {
266 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
267 if (width > 0 && height > 0) {
268 const GLfloat epsilon = 0.0001F;
269 GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
270 GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
272 if (ctx->Unpack.BufferObj->Name) {
273 /* unpack from PBO */
274 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
275 GL_COLOR_INDEX, GL_BITMAP,
276 (GLvoid *) bitmap)) {
277 _mesa_error(ctx, GL_INVALID_OPERATION,
278 "glBitmap(invalid PBO access)");
281 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
282 /* buffer is mapped - that's an error */
283 _mesa_error(ctx, GL_INVALID_OPERATION,
284 "glBitmap(PBO is mapped)");
289 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
293 else if (ctx->RenderMode == GL_FEEDBACK) {
294 FLUSH_CURRENT(ctx, 0);
295 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
296 _mesa_feedback_vertex( ctx,
297 ctx->Current.RasterPos,
298 ctx->Current.RasterColor,
299 ctx->Current.RasterIndex,
300 ctx->Current.RasterTexCoords[0] );
303 ASSERT(ctx->RenderMode == GL_SELECT);
304 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
308 /* update raster position */
309 ctx->Current.RasterPos[0] += xmove;
310 ctx->Current.RasterPos[1] += ymove;