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"
39 #include "st_cb_accum.h"
40 #include "st_cb_fbo.h"
42 #include "st_format.h"
43 #include "pipe/p_context.h"
44 #include "pipe/p_defines.h"
45 #include "pipe/p_inlines.h"
46 #include "pipe/util/p_tile.h"
49 #define UNCLAMPED_FLOAT_TO_SHORT(us, f) \
50 us = ( (short) ( CLAMP((f), -1.0, 1.0) * 32767.0F) )
54 * For hardware that supports deep color buffers, we could accelerate
55 * most/all the accum operations with blending/texturing.
56 * For now, just use the get/put_tile() functions and do things in software.
61 st_clear_accum_buffer(GLcontext
*ctx
, struct gl_renderbuffer
*rb
)
63 struct pipe_context
*pipe
= ctx
->st
->pipe
;
64 struct st_renderbuffer
*acc_strb
= st_renderbuffer(rb
);
65 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
66 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
67 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
68 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
69 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
70 const GLfloat r
= ctx
->Accum
.ClearColor
[0];
71 const GLfloat g
= ctx
->Accum
.ClearColor
[1];
72 const GLfloat b
= ctx
->Accum
.ClearColor
[2];
73 const GLfloat a
= ctx
->Accum
.ClearColor
[3];
74 GLfloat
*accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
77 for (i
= 0; i
< width
* height
; i
++) {
84 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
90 accum_mad(struct pipe_context
*pipe
, GLfloat scale
, GLfloat bias
,
91 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
92 struct pipe_surface
*acc_ps
)
97 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
99 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
101 for (i
= 0; i
< 4 * width
* height
; i
++) {
102 accBuf
[i
] = accBuf
[i
] * scale
+ bias
;
105 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
112 accum_accum(struct pipe_context
*pipe
, GLfloat value
,
113 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
114 struct pipe_surface
*acc_ps
,
115 struct pipe_surface
*color_ps
)
117 GLfloat
*colorBuf
, *accBuf
;
120 colorBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
121 accBuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
123 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, colorBuf
);
124 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
126 for (i
= 0; i
< 4 * width
* height
; i
++) {
127 accBuf
[i
] = accBuf
[i
] + colorBuf
[i
] * value
;
130 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, accBuf
);
138 accum_load(struct pipe_context
*pipe
, GLfloat value
,
139 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
140 struct pipe_surface
*acc_ps
,
141 struct pipe_surface
*color_ps
)
146 buf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
148 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, buf
);
150 for (i
= 0; i
< 4 * width
* height
; i
++) {
151 buf
[i
] = buf
[i
] * value
;
154 pipe_put_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, buf
);
161 accum_return(GLcontext
*ctx
, GLfloat value
,
162 GLint xpos
, GLint ypos
, GLint width
, GLint height
,
163 struct pipe_surface
*acc_ps
,
164 struct pipe_surface
*color_ps
)
166 struct pipe_context
*pipe
= ctx
->st
->pipe
;
167 const GLubyte
*colormask
= ctx
->Color
.ColorMask
;
168 GLfloat
*abuf
, *cbuf
= NULL
;
171 abuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
173 pipe_get_tile_rgba(pipe
, acc_ps
, xpos
, ypos
, width
, height
, abuf
);
175 if (!colormask
[0] || !colormask
[1] || !colormask
[2] || !colormask
[3]) {
176 cbuf
= (GLfloat
*) malloc(width
* height
* 4 * sizeof(GLfloat
));
177 pipe_get_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, cbuf
);
180 for (i
= 0; i
< width
* height
; i
++) {
181 for (ch
= 0; ch
< 4; ch
++) {
183 GLfloat val
= abuf
[i
* 4 + ch
] * value
;
184 abuf
[i
* 4 + ch
] = CLAMP(val
, 0.0, 1.0);
187 abuf
[i
* 4 + ch
] = cbuf
[i
* 4 + ch
];
192 pipe_put_tile_rgba(pipe
, color_ps
, xpos
, ypos
, width
, height
, abuf
);
201 st_Accum(GLcontext
*ctx
, GLenum op
, GLfloat value
)
203 struct st_context
*st
= ctx
->st
;
204 struct pipe_context
*pipe
= st
->pipe
;
205 struct st_renderbuffer
*acc_strb
206 = st_renderbuffer(ctx
->DrawBuffer
->Attachment
[BUFFER_ACCUM
].Renderbuffer
);
207 struct st_renderbuffer
*color_strb
208 = st_renderbuffer(ctx
->ReadBuffer
->_ColorReadBuffer
);
209 struct pipe_surface
*acc_ps
= acc_strb
->surface
;
210 struct pipe_surface
*color_ps
= color_strb
->surface
;
212 const GLint xpos
= ctx
->DrawBuffer
->_Xmin
;
213 const GLint ypos
= ctx
->DrawBuffer
->_Ymin
;
214 const GLint width
= ctx
->DrawBuffer
->_Xmax
- xpos
;
215 const GLint height
= ctx
->DrawBuffer
->_Ymax
- ypos
;
217 /* make sure color bufs aren't cached */
218 pipe
->flush(pipe
, PIPE_FLUSH_RENDER_CACHE
);
223 accum_mad(pipe
, 1.0, value
, xpos
, ypos
, width
, height
, acc_ps
);
228 accum_mad(pipe
, value
, 0.0, xpos
, ypos
, width
, height
, acc_ps
);
233 accum_accum(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
237 accum_load(pipe
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
240 accum_return(ctx
, value
, xpos
, ypos
, width
, height
, acc_ps
, color_ps
);
249 void st_init_accum_functions(struct dd_function_table
*functions
)
251 functions
->Accum
= st_Accum
;