3 * Mesa 3-D graphics library
6 * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
39 * Execute glDrawPixels
42 _mesa_DrawPixels( GLsizei width
, GLsizei height
,
43 GLenum format
, GLenum type
, const GLvoid
*pixels
)
45 GET_CURRENT_CONTEXT(ctx
);
46 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
48 if (width
< 0 || height
< 0) {
49 _mesa_error( ctx
, GL_INVALID_VALUE
, "glDrawPixels(width or height < 0" );
53 if (ctx
->RenderMode
==GL_RENDER
) {
55 if (!pixels
|| !ctx
->Current
.RasterPosValid
) {
60 _mesa_update_state(ctx
);
63 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
64 x
= IROUND(ctx
->Current
.RasterPos
[0]);
65 y
= IROUND(ctx
->Current
.RasterPos
[1]);
67 ctx
->OcclusionResult
= GL_TRUE
;
68 ctx
->Driver
.DrawPixels(ctx
, x
, y
, width
, height
, format
, type
,
69 &ctx
->Unpack
, pixels
);
71 else if (ctx
->RenderMode
==GL_FEEDBACK
) {
72 /* Feedback the current raster pos info */
73 if (ctx
->Current
.RasterPosValid
) {
74 FLUSH_CURRENT( ctx
, 0 );
75 FEEDBACK_TOKEN( ctx
, (GLfloat
) (GLint
) GL_DRAW_PIXEL_TOKEN
);
76 _mesa_feedback_vertex( ctx
,
77 ctx
->Current
.RasterPos
,
78 ctx
->Current
.RasterColor
,
79 ctx
->Current
.RasterIndex
,
80 ctx
->Current
.RasterTexCoords
[0] );
83 else if (ctx
->RenderMode
==GL_SELECT
) {
84 if (ctx
->Current
.RasterPosValid
) {
85 _mesa_update_hitflag( ctx
, ctx
->Current
.RasterPos
[2] );
91 _mesa_CopyPixels( GLint srcx
, GLint srcy
, GLsizei width
, GLsizei height
,
94 GET_CURRENT_CONTEXT(ctx
);
96 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
98 if (width
< 0 || height
< 0) {
99 _mesa_error( ctx
, GL_INVALID_VALUE
, "glCopyPixels(width or height < 0)" );
104 _mesa_update_state(ctx
);
107 if (ctx
->RenderMode
==GL_RENDER
) {
108 /* Destination of copy: */
109 if (!ctx
->Current
.RasterPosValid
) {
113 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
114 destx
= IROUND(ctx
->Current
.RasterPos
[0]);
115 desty
= IROUND(ctx
->Current
.RasterPos
[1]);
117 ctx
->OcclusionResult
= GL_TRUE
;
119 ctx
->Driver
.CopyPixels( ctx
, srcx
, srcy
, width
, height
, destx
, desty
,
122 else if (ctx
->RenderMode
== GL_FEEDBACK
) {
123 if (ctx
->Current
.RasterPosValid
) {
124 FLUSH_CURRENT( ctx
, 0 );
125 FEEDBACK_TOKEN( ctx
, (GLfloat
) (GLint
) GL_COPY_PIXEL_TOKEN
);
126 _mesa_feedback_vertex( ctx
,
127 ctx
->Current
.RasterPos
,
128 ctx
->Current
.RasterColor
,
129 ctx
->Current
.RasterIndex
,
130 ctx
->Current
.RasterTexCoords
[0] );
133 else if (ctx
->RenderMode
== GL_SELECT
) {
134 _mesa_update_hitflag( ctx
, ctx
->Current
.RasterPos
[2] );
143 _mesa_ReadPixels( GLint x
, GLint y
, GLsizei width
, GLsizei height
,
144 GLenum format
, GLenum type
, GLvoid
*pixels
)
146 GET_CURRENT_CONTEXT(ctx
);
147 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
149 if (width
< 0 || height
< 0) {
150 _mesa_error( ctx
, GL_INVALID_VALUE
,
151 "glReadPixels(width=%d height=%d)", width
, height
);
156 _mesa_error( ctx
, GL_INVALID_VALUE
, "glReadPixels(pixels)" );
161 _mesa_update_state(ctx
);
163 ctx
->Driver
.ReadPixels(ctx
, x
, y
, width
, height
,
164 format
, type
, &ctx
->Pack
, pixels
);
172 _mesa_Bitmap( GLsizei width
, GLsizei height
,
173 GLfloat xorig
, GLfloat yorig
, GLfloat xmove
, GLfloat ymove
,
174 const GLubyte
*bitmap
)
176 GET_CURRENT_CONTEXT(ctx
);
177 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
179 if (width
< 0 || height
< 0) {
180 _mesa_error( ctx
, GL_INVALID_VALUE
, "glBitmap(width or height < 0)" );
184 if (ctx
->Current
.RasterPosValid
== GL_FALSE
) {
185 return; /* do nothing */
188 if (ctx
->RenderMode
==GL_RENDER
) {
190 /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */
191 GLint x
= IFLOOR(ctx
->Current
.RasterPos
[0] - xorig
);
192 GLint y
= IFLOOR(ctx
->Current
.RasterPos
[1] - yorig
);
195 _mesa_update_state(ctx
);
198 ctx
->OcclusionResult
= GL_TRUE
;
199 ctx
->Driver
.Bitmap( ctx
, x
, y
, width
, height
, &ctx
->Unpack
, bitmap
);
203 else if (ctx
->RenderMode
==GL_FEEDBACK
) {
204 if (ctx
->Current
.RasterPosValid
) {
205 FLUSH_CURRENT(ctx
, 0);
206 FEEDBACK_TOKEN( ctx
, (GLfloat
) (GLint
) GL_BITMAP_TOKEN
);
207 _mesa_feedback_vertex( ctx
,
208 ctx
->Current
.RasterPos
,
209 ctx
->Current
.RasterColor
,
210 ctx
->Current
.RasterIndex
,
211 ctx
->Current
.RasterTexCoords
[0] );
215 ASSERT(ctx
->RenderMode
== GL_SELECT
);
216 /* Bitmaps don't generate selection hits. See appendix B of 1.1 spec. */
220 /* update raster position */
221 ctx
->Current
.RasterPos
[0] += xmove
;
222 ctx
->Current
.RasterPos
[1] += ymove
;
227 #if 0 /* experimental */
229 * Execute glDrawDepthPixelsMESA(). This function accepts both a color
230 * image and depth (Z) image. Rasterization produces fragments with
231 * color and Z taken from these images. This function is intended for
232 * Z-compositing. Normally, this operation requires two glDrawPixels
233 * calls with stencil testing.
236 _mesa_DrawDepthPixelsMESA( GLsizei width
, GLsizei height
,
237 GLenum colorFormat
, GLenum colorType
,
238 const GLvoid
*colors
,
239 GLenum depthType
, const GLvoid
*depths
)
241 GET_CURRENT_CONTEXT(ctx
);
242 ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx
);
244 if (width
< 0 || height
< 0) {
245 _mesa_error( ctx
, GL_INVALID_VALUE
,
246 "glDrawDepthPixelsMESA(width or height < 0" );
250 if (ctx
->RenderMode
==GL_RENDER
) {
252 if (!colors
|| !depths
|| !ctx
->Current
.RasterPosValid
) {
257 _mesa_update_state(ctx
);
260 /* Round, to satisfy conformance tests (matches SGI's OpenGL) */
261 x
= IROUND(ctx
->Current
.RasterPos
[0]);
262 y
= IROUND(ctx
->Current
.RasterPos
[1]);
264 ctx
->OcclusionResult
= GL_TRUE
;
265 ctx
->Driver
.DrawDepthPixelsMESA(ctx
, x
, y
, width
, height
,
266 colorFormat
, colorType
, colors
,
267 depthType
, depths
, &ctx
->Unpack
);
269 else if (ctx
->RenderMode
==GL_FEEDBACK
) {
270 /* Feedback the current raster pos info */
271 if (ctx
->Current
.RasterPosValid
) {
272 FLUSH_CURRENT( ctx
, 0 );
273 FEEDBACK_TOKEN( ctx
, (GLfloat
) (GLint
) GL_DRAW_PIXEL_TOKEN
);
274 _mesa_feedback_vertex( ctx
,
275 ctx
->Current
.RasterPos
,
276 ctx
->Current
.RasterColor
,
277 ctx
->Current
.RasterIndex
,
278 ctx
->Current
.RasterTexCoords
[0] );
281 else if (ctx
->RenderMode
==GL_SELECT
) {
282 if (ctx
->Current
.RasterPosValid
) {
283 _mesa_update_hitflag( ctx
, ctx
->Current
.RasterPos
[2] );