2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2005 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.
25 /* KW: Moved these here to remove knowledge of swrast from core mesa.
26 * Should probably pull the entire software implementation of these
27 * extensions into either swrast or a sister module.
30 #include "main/glheader.h"
31 #include "main/colortab.h"
32 #include "main/convolve.h"
33 #include "s_context.h"
38 _swrast_CopyColorTable( GLcontext *ctx,
39 GLenum target, GLenum internalformat,
40 GLint x, GLint y, GLsizei width)
42 GLchan data[MAX_WIDTH][4];
43 struct gl_buffer_object *bufferSave;
45 if (!ctx->ReadBuffer->_ColorReadBuffer) {
46 /* no readbuffer - OK */
50 if (width > MAX_WIDTH)
53 swrast_render_start(ctx);
55 /* read the data from framebuffer */
56 _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
57 width, x, y, CHAN_TYPE, data );
59 swrast_render_finish(ctx);
61 /* save PBO binding */
62 bufferSave = ctx->Unpack.BufferObj;
63 ctx->Unpack.BufferObj = ctx->Shared->NullBufferObj;
65 _mesa_ColorTable(target, internalformat, width, GL_RGBA, CHAN_TYPE, data);
67 /* restore PBO binding */
68 ctx->Unpack.BufferObj = bufferSave;
73 _swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
74 GLint x, GLint y, GLsizei width)
76 GLchan data[MAX_WIDTH][4];
77 struct gl_buffer_object *bufferSave;
79 if (!ctx->ReadBuffer->_ColorReadBuffer) {
80 /* no readbuffer - OK */
84 if (width > MAX_WIDTH)
87 swrast_render_start(ctx);
89 /* read the data from framebuffer */
90 _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
91 width, x, y, CHAN_TYPE, data );
93 swrast_render_finish(ctx);
95 /* save PBO binding */
96 bufferSave = ctx->Unpack.BufferObj;
97 ctx->Unpack.BufferObj = ctx->Shared->NullBufferObj;
99 _mesa_ColorSubTable(target, start, width, GL_RGBA, CHAN_TYPE, data);
101 /* restore PBO binding */
102 ctx->Unpack.BufferObj = bufferSave;
107 _swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
108 GLenum internalFormat,
109 GLint x, GLint y, GLsizei width)
111 GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
112 struct gl_buffer_object *bufferSave;
114 if (!ctx->ReadBuffer->_ColorReadBuffer) {
115 /* no readbuffer - OK */
119 swrast_render_start(ctx);
121 /* read the data from framebuffer */
122 _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
123 width, x, y, CHAN_TYPE, rgba );
125 swrast_render_finish(ctx);
127 /* save PBO binding */
128 bufferSave = ctx->Unpack.BufferObj;
129 ctx->Unpack.BufferObj = ctx->Shared->NullBufferObj;
131 /* store as convolution filter */
132 _mesa_ConvolutionFilter1D(target, internalFormat, width,
133 GL_RGBA, CHAN_TYPE, rgba);
135 /* restore PBO binding */
136 ctx->Unpack.BufferObj = bufferSave;
141 _swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
142 GLenum internalFormat,
143 GLint x, GLint y, GLsizei width, GLsizei height)
145 struct gl_pixelstore_attrib packSave;
146 GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
148 struct gl_buffer_object *bufferSave;
150 if (!ctx->ReadBuffer->_ColorReadBuffer) {
151 /* no readbuffer - OK */
155 swrast_render_start(ctx);
157 /* read pixels from framebuffer */
158 for (i = 0; i < height; i++) {
159 _swrast_read_rgba_span( ctx, ctx->ReadBuffer->_ColorReadBuffer,
160 width, x, y + i, CHAN_TYPE, rgba[i] );
163 swrast_render_finish(ctx);
166 * HACK: save & restore context state so we can store this as a
167 * convolution filter via the GL api. Doesn't call any callbacks
168 * hanging off ctx->Unpack statechanges.
171 packSave = ctx->Unpack; /* save pixel packing params */
173 ctx->Unpack.Alignment = 1;
174 ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
175 ctx->Unpack.SkipPixels = 0;
176 ctx->Unpack.SkipRows = 0;
177 ctx->Unpack.ImageHeight = 0;
178 ctx->Unpack.SkipImages = 0;
179 ctx->Unpack.SwapBytes = GL_FALSE;
180 ctx->Unpack.LsbFirst = GL_FALSE;
181 ctx->Unpack.BufferObj = ctx->Shared->NullBufferObj;
182 ctx->NewState |= _NEW_PACKUNPACK;
184 /* save PBO binding */
185 bufferSave = ctx->Unpack.BufferObj;
186 ctx->Unpack.BufferObj = ctx->Shared->NullBufferObj;
188 _mesa_ConvolutionFilter2D(target, internalFormat, width, height,
189 GL_RGBA, CHAN_TYPE, rgba);
191 /* restore PBO binding */
192 ctx->Unpack.BufferObj = bufferSave;
194 ctx->Unpack = packSave; /* restore pixel packing params */
195 ctx->NewState |= _NEW_PACKUNPACK;