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.
26 /* KW: Moved these here to remove knowledge of swrast from core mesa.
27 * Should probably pull the entire software implementation of these
28 * extensions into either swrast or a sister module.
31 #include "s_context.h"
35 _swrast_CopyColorTable( GLcontext
*ctx
,
36 GLenum target
, GLenum internalformat
,
37 GLint x
, GLint y
, GLsizei width
)
39 GLchan data
[MAX_WIDTH
][4];
41 /* Select buffer to read from */
42 _swrast_use_read_buffer(ctx
);
44 if (width
> MAX_WIDTH
)
47 /* read the data from framebuffer */
48 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
, width
, x
, y
, data
);
50 /* Restore reading from draw buffer (the default) */
51 _swrast_use_draw_buffer(ctx
);
53 glColorTable(target
, internalformat
, width
, GL_RGBA
, CHAN_TYPE
, data
);
57 _swrast_CopyColorSubTable( GLcontext
*ctx
,GLenum target
, GLsizei start
,
58 GLint x
, GLint y
, GLsizei width
)
60 GLchan data
[MAX_WIDTH
][4];
62 /* Select buffer to read from */
63 _swrast_use_read_buffer(ctx
);
65 if (width
> MAX_WIDTH
)
68 /* read the data from framebuffer */
69 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
, width
, x
, y
, data
);
71 /* Restore reading from draw buffer (the default) */
72 _swrast_use_draw_buffer(ctx
);
74 glColorSubTable(target
, start
, width
, GL_RGBA
, CHAN_TYPE
, data
);
79 _swrast_CopyConvolutionFilter1D(GLcontext
*ctx
, GLenum target
,
80 GLenum internalFormat
,
81 GLint x
, GLint y
, GLsizei width
)
83 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
84 GLchan rgba
[MAX_CONVOLUTION_WIDTH
][4];
86 /* Select buffer to read from */
87 _swrast_use_read_buffer(ctx
);
89 RENDER_START( swrast
, ctx
);
91 /* read the data from framebuffer */
92 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
, width
, x
, y
,
93 (GLchan (*)[4]) rgba
);
95 RENDER_FINISH( swrast
, ctx
);
97 /* Restore reading from draw buffer (the default) */
98 _swrast_use_draw_buffer(ctx
);
100 /* store as convolution filter */
101 glConvolutionFilter1D(target
, internalFormat
, width
,
102 GL_RGBA
, CHAN_TYPE
, rgba
);
107 _swrast_CopyConvolutionFilter2D(GLcontext
*ctx
, GLenum target
,
108 GLenum internalFormat
,
109 GLint x
, GLint y
, GLsizei width
, GLsizei height
)
111 SWcontext
*swrast
= SWRAST_CONTEXT(ctx
);
112 struct gl_pixelstore_attrib packSave
;
113 GLchan rgba
[MAX_CONVOLUTION_HEIGHT
][MAX_CONVOLUTION_WIDTH
][4];
116 /* Select buffer to read from */
117 _swrast_use_read_buffer(ctx
);
119 RENDER_START(swrast
,ctx
);
121 /* read pixels from framebuffer */
122 for (i
= 0; i
< height
; i
++) {
123 _swrast_read_rgba_span( ctx
, ctx
->ReadBuffer
, width
, x
, y
+ i
,
124 (GLchan (*)[4]) rgba
[i
] );
127 RENDER_FINISH(swrast
,ctx
);
129 /* Restore reading from draw buffer (the default) */
130 _swrast_use_draw_buffer(ctx
);
133 * HACK: save & restore context state so we can store this as a
134 * convolution filter via the GL api. Doesn't call any callbacks
135 * hanging off ctx->Unpack statechanges.
138 packSave
= ctx
->Unpack
; /* save pixel packing params */
140 ctx
->Unpack
.Alignment
= 1;
141 ctx
->Unpack
.RowLength
= MAX_CONVOLUTION_WIDTH
;
142 ctx
->Unpack
.SkipPixels
= 0;
143 ctx
->Unpack
.SkipRows
= 0;
144 ctx
->Unpack
.ImageHeight
= 0;
145 ctx
->Unpack
.SkipImages
= 0;
146 ctx
->Unpack
.SwapBytes
= GL_FALSE
;
147 ctx
->Unpack
.LsbFirst
= GL_FALSE
;
148 ctx
->NewState
|= _NEW_PACKUNPACK
;
150 glConvolutionFilter2D(target
, internalFormat
, width
, height
,
151 GL_RGBA
, CHAN_TYPE
, rgba
);
153 ctx
->Unpack
= packSave
; /* restore pixel packing params */
154 ctx
->NewState
|= _NEW_PACKUNPACK
;