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"
33 #include "mfeatures.h"
43 * Execute glDrawPixels
45 static void GLAPIENTRY
46 _mesa_DrawPixels( GLsizei width, GLsizei height,
47 GLenum format, GLenum type, const GLvoid *pixels )
49 GET_CURRENT_CONTEXT(ctx);
50 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
52 if (width < 0 || height < 0) {
53 _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" );
57 /* We're not using the current vertex program, and the driver may install
58 * its own. Note: this may dirty some state.
60 _mesa_set_vp_override(ctx, GL_TRUE);
62 /* Note: this call does state validation */
63 if (!_mesa_valid_to_render(ctx, "glDrawPixels")) {
64 goto end; /* the error code was recorded */
67 if (_mesa_error_check_format_type(ctx, format, type, GL_TRUE)) {
68 goto end; /* the error code was recorded */
71 if (!ctx->Current.RasterPosValid) {
72 goto end; /* no-op, not an error */
75 if (ctx->RenderMode == GL_RENDER) {
76 if (width > 0 && height > 0) {
77 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
78 GLint x = IROUND(ctx->Current.RasterPos[0]);
79 GLint y = IROUND(ctx->Current.RasterPos[1]);
81 if (ctx->Unpack.BufferObj->Name) {
83 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
84 format, type, pixels)) {
85 _mesa_error(ctx, GL_INVALID_OPERATION,
86 "glDrawPixels(invalid PBO access)");
89 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
90 /* buffer is mapped - that's an error */
91 _mesa_error(ctx, GL_INVALID_OPERATION,
92 "glDrawPixels(PBO is mapped)");
97 ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type,
98 &ctx->Unpack, pixels);
101 else if (ctx->RenderMode == GL_FEEDBACK) {
102 /* Feedback the current raster pos info */
103 FLUSH_CURRENT( ctx, 0 );
104 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN );
105 _mesa_feedback_vertex( ctx,
106 ctx->Current.RasterPos,
107 ctx->Current.RasterColor,
108 ctx->Current.RasterTexCoords[0] );
111 ASSERT(ctx->RenderMode == GL_SELECT);
112 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
116 _mesa_set_vp_override(ctx, GL_FALSE);
120 static void GLAPIENTRY
121 _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height,
124 GET_CURRENT_CONTEXT(ctx);
125 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
127 if (width < 0 || height < 0) {
128 _mesa_error(ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)");
132 /* Note: more detailed 'type' checking is done by the
133 * _mesa_source/dest_buffer_exists() calls below. That's where we
134 * check if the stencil buffer exists, etc.
136 if (type != GL_COLOR &&
138 type != GL_STENCIL &&
139 type != GL_DEPTH_STENCIL) {
140 _mesa_error(ctx, GL_INVALID_ENUM, "glCopyPixels(type=%s)",
141 _mesa_lookup_enum_by_nr(type));
145 /* We're not using the current vertex program, and the driver may install
146 * it's own. Note: this may dirty some state.
148 _mesa_set_vp_override(ctx, GL_TRUE);
150 /* Note: this call does state validation */
151 if (!_mesa_valid_to_render(ctx, "glCopyPixels")) {
152 goto end; /* the error code was recorded */
155 /* Check read buffer's status (draw buffer was already checked) */
156 if (ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
157 _mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
158 "glCopyPixels(incomplete framebuffer)" );
162 if (!_mesa_source_buffer_exists(ctx, type) ||
163 !_mesa_dest_buffer_exists(ctx, type)) {
164 _mesa_error(ctx, GL_INVALID_OPERATION,
165 "glCopyPixels(missing source or dest buffer)");
169 if (!ctx->Current.RasterPosValid || width ==0 || height == 0) {
170 goto end; /* no-op, not an error */
173 if (ctx->RenderMode == GL_RENDER) {
174 /* Round to satisfy conformance tests (matches SGI's OpenGL) */
175 if (width > 0 && height > 0) {
176 GLint destx = IROUND(ctx->Current.RasterPos[0]);
177 GLint desty = IROUND(ctx->Current.RasterPos[1]);
178 ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty,
182 else if (ctx->RenderMode == GL_FEEDBACK) {
183 FLUSH_CURRENT( ctx, 0 );
184 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN );
185 _mesa_feedback_vertex( ctx,
186 ctx->Current.RasterPos,
187 ctx->Current.RasterColor,
188 ctx->Current.RasterTexCoords[0] );
191 ASSERT(ctx->RenderMode == GL_SELECT);
192 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
196 _mesa_set_vp_override(ctx, GL_FALSE);
200 static void GLAPIENTRY
201 _mesa_Bitmap( GLsizei width, GLsizei height,
202 GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove,
203 const GLubyte *bitmap )
205 GET_CURRENT_CONTEXT(ctx);
206 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
208 if (width < 0 || height < 0) {
209 _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" );
213 if (!ctx->Current.RasterPosValid) {
214 return; /* do nothing */
217 /* Note: this call does state validation */
218 if (!_mesa_valid_to_render(ctx, "glBitmap")) {
219 /* the error code was recorded */
223 if (ctx->RenderMode == GL_RENDER) {
224 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
225 if (width > 0 && height > 0) {
226 const GLfloat epsilon = 0.0001F;
227 GLint x = IFLOOR(ctx->Current.RasterPos[0] + epsilon - xorig);
228 GLint y = IFLOOR(ctx->Current.RasterPos[1] + epsilon - yorig);
230 if (ctx->Unpack.BufferObj->Name) {
231 /* unpack from PBO */
232 if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
233 GL_COLOR_INDEX, GL_BITMAP,
234 (GLvoid *) bitmap)) {
235 _mesa_error(ctx, GL_INVALID_OPERATION,
236 "glBitmap(invalid PBO access)");
239 if (_mesa_bufferobj_mapped(ctx->Unpack.BufferObj)) {
240 /* buffer is mapped - that's an error */
241 _mesa_error(ctx, GL_INVALID_OPERATION,
242 "glBitmap(PBO is mapped)");
247 ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap );
251 else if (ctx->RenderMode == GL_FEEDBACK) {
252 FLUSH_CURRENT(ctx, 0);
253 _mesa_feedback_token( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN );
254 _mesa_feedback_vertex( ctx,
255 ctx->Current.RasterPos,
256 ctx->Current.RasterColor,
257 ctx->Current.RasterTexCoords[0] );
260 ASSERT(ctx->RenderMode == GL_SELECT);
261 /* Do nothing. See OpenGL Spec, Appendix B, Corollary 6. */
265 /* update raster position */
266 ctx->Current.RasterPos[0] += xmove;
267 ctx->Current.RasterPos[1] += ymove;
272 _mesa_init_drawpix_dispatch(struct _glapi_table *disp)
274 SET_Bitmap(disp, _mesa_Bitmap);
275 SET_CopyPixels(disp, _mesa_CopyPixels);
276 SET_DrawPixels(disp, _mesa_DrawPixels);
280 #endif /* FEATURE_drawpix */