blob: 2522c3c423b2b732988658c8471b911a7c38bbfc (
plain)
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
|
#include "util/u_memory.h"
#include "lp_context.h"
#include "lp_quad.h"
#include "lp_surface.h"
#include "lp_quad_pipe.h"
/**
* Loop over colorbuffers, passing quad to next stage each time.
*/
static void
cbuf_loop_quad(struct quad_stage *qs, struct quad_header *quad)
{
struct llvmpipe_context *llvmpipe = qs->llvmpipe;
float tmp[PIPE_MAX_COLOR_BUFS][4][QUAD_SIZE];
unsigned i;
assert(sizeof(quad->outputs.color) == sizeof(tmp));
assert(llvmpipe->framebuffer.nr_cbufs <= PIPE_MAX_COLOR_BUFS);
/* make copy of original colors since they can get modified
* by blending and masking.
* XXX we won't have to do this if the fragment program actually emits
* N separate colors and we're drawing to N color buffers (MRT).
* But if we emitted one color and glDrawBuffer(GL_FRONT_AND_BACK) is
* in effect, we need to save/restore colors like this.
*/
memcpy(tmp, quad->outputs.color, sizeof(tmp));
for (i = 0; i < llvmpipe->framebuffer.nr_cbufs; i++) {
/* set current cbuffer */
#if 0 /* obsolete & going away */
llvmpipe->current_cbuf = i;
#endif
/* pass blended quad to next stage */
qs->next->run(qs->next, quad);
/* restore quad's colors for next buffer */
memcpy(quad->outputs.color, tmp, sizeof(tmp));
}
}
static void cbuf_loop_begin(struct quad_stage *qs)
{
qs->next->begin(qs->next);
}
static void cbuf_loop_destroy(struct quad_stage *qs)
{
FREE( qs );
}
/**
* Create the colorbuffer loop stage.
* This is used to implement multiple render targets and GL_FRONT_AND_BACK
* rendering.
*/
struct quad_stage *lp_quad_bufloop_stage( struct llvmpipe_context *llvmpipe )
{
struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
stage->llvmpipe = llvmpipe;
stage->begin = cbuf_loop_begin;
stage->run = cbuf_loop_quad;
stage->destroy = cbuf_loop_destroy;
return stage;
}
|
