1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
33 #include "main/imports.h"
34 #include "main/image.h"
35 #include "main/macros.h"
37 #include "st_context.h"
38 #include "st_cb_accum.h"
39 #include "st_cb_fbo.h"
41 #include "st_format.h"
42 #include "pipe/p_context.h"
43 #include "pipe/p_defines.h"
44 #include "pipe/p_inlines.h"
45 #include "util/p_tile.h"
48 #define UNCLAMPED_FLOAT_TO_SHORT(us, f) \
49 us = ( (short) ( CLAMP((f), -1.0, 1.0) * 32767.0F) )
53 * For hardware that supports deep color buffers, we could accelerate
54 * most/all the accum operations with blending/texturing.
55 * For now, just use the get/put_tile() functions and do things in software.
60 st_clear_accum_buffer(GLcontext
*ctx
, struct gl_renderbuffer
*rb
)
62 struct pipe_context
*pipe
= ctx
->st
->pipe
;
63 struct st_renderbuffer
*acc_strb
= st_renderbuffer(rb
);
64 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
65 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
66 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
67 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
68 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
69 const GLfloat r
= ctx
->Accum
.ClearColor
[0];
70 const GLfloat g
= ctx
->Accum
.ClearColor
[1];
71 const GLfloat b
= ctx
->Accum
.ClearColor
[2];
72 const GLfloat a
= ctx
->Accum
.ClearColor
[3];
73 GLfloat
*accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
76 for (i
= 0; i
< width
* height
; i
++) {
83 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
89 accum_mad(struct pipe_context
*pipe
, GLfloat scale
, GLfloat bias
,
90 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
91 struct pipe_surface
*acc_ps
)
96 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
98 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
100 for (i
= 0; i
< 4 * width
* height
; i
++) {
101 accBuf
[i
] = accBuf
[i
] * scale
+ bias
;
104 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
111 accum_accum(struct pipe_context
*pipe
, GLfloat value
,
112 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
113 struct pipe_surface
*acc_ps
,
114 struct pipe_surface
*color_ps
)
116 GLfloat
*colorBuf
, *accBuf
;
119 colorBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
120 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
122 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, colorBuf
);
123 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
125 for (i
= 0; i
< 4 * width
* height
; i
++) {
126 accBuf
[i
] = accBuf
[i
] + colorBuf
[i
] * value
;
129 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
137 accum_load(struct pipe_context
*pipe
, GLfloat value
,
138 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
139 struct pipe_surface
*acc_ps
,
140 struct pipe_surface
*color_ps
)
145 buf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
147 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, buf
);
149 for (i
= 0; i
< 4 * width
* height
; i
++) {
150 buf
[i
] = buf
[i
] * value
;
153 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, buf
);
160 accum_return(GLcontext
*ctx
, GLfloat value
,
161 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
162 struct pipe_surface
*acc_ps
,
163 struct pipe_surface
*color_ps
)
165 struct pipe_context
*pipe
= ctx
->st
->pipe
;
166 const GLubyte
*colormask
= ctx
->Color
.ColorMask
;
167 GLfloat
*abuf
, *cbuf
= NULL
;
170 abuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
172 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, abuf
);
174 if (!colormask
[0] || !colormask
[1] || !colormask
[2] || !colormask
[3]) {
175 cbuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
176 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, cbuf
);
179 for (i
= 0; i
< width
* height
; i
++) {
180 for (ch
= 0; ch
< 4; ch
++) {
182 GLfloat val
= abuf
[i
* 4 + ch
] * value
;
183 abuf
[i
* 4 + ch
] = CLAMP(val
, 0.0, 1.0);
186 abuf
[i
* 4 + ch
] = cbuf
[i
* 4 + ch
];
191 pipe_put_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, abuf
);
200 st_Accum(GLcontext
*ctx
, GLenum op
, GLfloat value
)
202 struct st_context
*st
= ctx
->st
;
203 struct pipe_context
*pipe
= st
->pipe
;
204 struct st_renderbuffer
*acc_strb
205 = st_renderbuffer(ctx
->DrawBuffer
->Attachment
[BUFFER_ACCUM
].Renderbuffer
);
206 struct st_renderbuffer
*color_strb
207 = st_renderbuffer(ctx
->ReadBuffer
->_ColorReadBuffer
);
208 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
209 struct pipe_surface
*color_ps
= color_strb
->surface
;
211 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
212 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
213 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
214 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
216 /* make sure color bufs aren't cached */
217 pipe
->flush(pipe
, PIPE_FLUSH_RENDER_CACHE
);
222 accum_mad(pipe
, 1.0, value
, xpos
, ypos
, width
, height
, acc_ps
);
227 accum_mad(pipe
, value
, 0.0, xpos
, ypos
, width
, height
, acc_ps
);
232 accum_accum(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
236 accum_load(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
239 accum_return(ctx
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
248 void st_init_accum_functions(struct dd_function_table
*functions
)
250 functions
->Accum
= st_Accum
;