1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
* Brian Paul
*/
#include "st_context.h"
#include "st_cache.h"
#include "st_atom.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
/**
* Convert GLenum blend tokens to pipe tokens.
* Both blend factors and blend funcs are accepted.
*/
static GLuint
translate_blend(GLenum blend)
{
switch (blend) {
/* blend functions */
case GL_FUNC_ADD:
return PIPE_BLEND_ADD;
case GL_FUNC_SUBTRACT:
return PIPE_BLEND_SUBTRACT;
case GL_FUNC_REVERSE_SUBTRACT:
return PIPE_BLEND_REVERSE_SUBTRACT;
case GL_MIN:
return PIPE_BLEND_MIN;
case GL_MAX:
return PIPE_BLEND_MAX;
/* blend factors */
case GL_ONE:
return PIPE_BLENDFACTOR_ONE;
case GL_SRC_COLOR:
return PIPE_BLENDFACTOR_SRC_COLOR;
case GL_SRC_ALPHA:
return PIPE_BLENDFACTOR_SRC_ALPHA;
case GL_DST_ALPHA:
return PIPE_BLENDFACTOR_DST_ALPHA;
case GL_DST_COLOR:
return PIPE_BLENDFACTOR_DST_COLOR;
case GL_SRC_ALPHA_SATURATE:
return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE;
case GL_CONSTANT_COLOR:
return PIPE_BLENDFACTOR_CONST_COLOR;
case GL_CONSTANT_ALPHA:
return PIPE_BLENDFACTOR_CONST_ALPHA;
/*
return PIPE_BLENDFACTOR_SRC1_COLOR;
return PIPE_BLENDFACTOR_SRC1_ALPHA;
*/
case GL_ZERO:
return PIPE_BLENDFACTOR_ZERO;
case GL_ONE_MINUS_SRC_COLOR:
return PIPE_BLENDFACTOR_INV_SRC_COLOR;
case GL_ONE_MINUS_SRC_ALPHA:
return PIPE_BLENDFACTOR_INV_SRC_ALPHA;
case GL_ONE_MINUS_DST_COLOR:
return PIPE_BLENDFACTOR_INV_DST_COLOR;
case GL_ONE_MINUS_DST_ALPHA:
return PIPE_BLENDFACTOR_INV_DST_ALPHA;
case GL_ONE_MINUS_CONSTANT_COLOR:
return PIPE_BLENDFACTOR_INV_CONST_COLOR;
case GL_ONE_MINUS_CONSTANT_ALPHA:
return PIPE_BLENDFACTOR_INV_CONST_ALPHA;
/*
return PIPE_BLENDFACTOR_INV_SRC1_COLOR;
return PIPE_BLENDFACTOR_INV_SRC1_ALPHA;
*/
default:
assert("invalid GL token in translate_blend()" == NULL);
return 0;
}
}
/**
* Convert GLenum logicop tokens to pipe tokens.
*/
static GLuint
translate_logicop(GLenum logicop)
{
switch (logicop) {
case GL_CLEAR:
return PIPE_LOGICOP_CLEAR;
case GL_NOR:
return PIPE_LOGICOP_NOR;
case GL_AND_INVERTED:
return PIPE_LOGICOP_AND_INVERTED;
case GL_COPY_INVERTED:
return PIPE_LOGICOP_COPY_INVERTED;
case GL_AND_REVERSE:
return PIPE_LOGICOP_AND_REVERSE;
case GL_INVERT:
return PIPE_LOGICOP_INVERT;
case GL_XOR:
return PIPE_LOGICOP_XOR;
case GL_NAND:
return PIPE_LOGICOP_NAND;
case GL_AND:
return PIPE_LOGICOP_AND;
case GL_EQUIV:
return PIPE_LOGICOP_EQUIV;
case GL_NOOP:
return PIPE_LOGICOP_NOOP;
case GL_OR_INVERTED:
return PIPE_LOGICOP_OR_INVERTED;
case GL_COPY:
return PIPE_LOGICOP_COPY;
case GL_OR_REVERSE:
return PIPE_LOGICOP_OR_REVERSE;
case GL_OR:
return PIPE_LOGICOP_OR;
case GL_SET:
return PIPE_LOGICOP_SET;
default:
assert("invalid GL token in translate_logicop()" == NULL);
return 0;
}
}
static void
update_blend( struct st_context *st )
{
struct pipe_blend_state blend;
const struct cso_blend *cso;
memset(&blend, 0, sizeof(blend));
if (st->ctx->Color.ColorLogicOpEnabled ||
(st->ctx->Color.BlendEnabled &&
st->ctx->Color.BlendEquationRGB == GL_LOGIC_OP)) {
/* logicop enabled */
blend.logicop_enable = 1;
blend.logicop_func = translate_logicop(st->ctx->Color.LogicOp);
}
else if (st->ctx->Color.BlendEnabled) {
/* blending enabled */
blend.blend_enable = 1;
blend.rgb_func = translate_blend(st->ctx->Color.BlendEquationRGB);
if (st->ctx->Color.BlendEquationRGB == GL_MIN ||
st->ctx->Color.BlendEquationRGB == GL_MAX) {
/* Min/max are special */
blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
blend.rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
}
else {
blend.rgb_src_factor = translate_blend(st->ctx->Color.BlendSrcRGB);
blend.rgb_dst_factor = translate_blend(st->ctx->Color.BlendDstRGB);
}
blend.alpha_func = translate_blend(st->ctx->Color.BlendEquationA);
if (st->ctx->Color.BlendEquationA == GL_MIN ||
st->ctx->Color.BlendEquationA == GL_MAX) {
/* Min/max are special */
blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
blend.alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
}
else {
blend.alpha_src_factor = translate_blend(st->ctx->Color.BlendSrcA);
blend.alpha_dst_factor = translate_blend(st->ctx->Color.BlendDstA);
}
}
else {
/* no blending / logicop */
}
/* Colormask - maybe reverse these bits? */
if (st->ctx->Color.ColorMask[0])
blend.colormask |= PIPE_MASK_R;
if (st->ctx->Color.ColorMask[1])
blend.colormask |= PIPE_MASK_G;
if (st->ctx->Color.ColorMask[2])
blend.colormask |= PIPE_MASK_B;
if (st->ctx->Color.ColorMask[3])
blend.colormask |= PIPE_MASK_A;
if (st->ctx->Color.DitherFlag)
blend.dither = 1;
cso = st_cached_blend_state(st, &blend);
if (st->state.blend != cso) {
/* state has changed */
st->state.blend = cso;
/* bind new state */
st->pipe->bind_blend_state(st->pipe, cso->data);
}
if (memcmp(st->ctx->Color.BlendColor, &st->state.blend_color, 4 * sizeof(GLfloat)) != 0) {
/* state has changed */
st->state.blend_color.color[0] = st->ctx->Color.BlendColor[0];
st->state.blend_color.color[1] = st->ctx->Color.BlendColor[1];
st->state.blend_color.color[2] = st->ctx->Color.BlendColor[2];
st->state.blend_color.color[3] = st->ctx->Color.BlendColor[3];
st->pipe->set_blend_color(st->pipe, (struct pipe_blend_color *) st->ctx->Color.BlendColor);
}
}
const struct st_tracked_state st_update_blend = {
.name = "st_update_blend",
.dirty = {
.mesa = (_NEW_COLOR), /* XXX _NEW_BLEND someday? */
.st = 0,
},
.update = update_blend
};
|
