pp_run.c revision de43cd310ce1d9878efe9d760a781489d7d642e2 
1/**************************************************************************
2 *
3 * Copyright 2011 Lauri Kasanen
4 * All Rights Reserved.
5 *
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:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
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 THE AUTHORS 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.
25 *
26 **************************************************************************/
27
28#include "postprocess.h"
29
30#include "postprocess/pp_filters.h"
31#include "util/u_blit.h"
32#include "util/u_inlines.h"
33#include "util/u_sampler.h"
34
35/**
36*	Main run function of the PP queue. Called on swapbuffers/flush.
37*
38*	Runs all requested filters in order and handles shuffling the temp
39*	buffers in between.
40*/
41void
42pp_run(struct pp_queue_t *ppq, struct pipe_resource *in,
43       struct pipe_resource *out, struct pipe_resource *indepth)
44{
45
46   unsigned int i;
47
48   if (in->width0 != ppq->p->framebuffer.width ||
49       in->height0 != ppq->p->framebuffer.height) {
50      pp_debug("Resizing the temp pp buffers\n");
51      pp_free_fbos(ppq);
52      pp_init_fbos(ppq, in->width0, in->height0, indepth);
53   }
54
55   if (in == out && ppq->n_filters == 1) {
56      /* Make a copy of in to tmp[0] in this case. */
57      unsigned int w = ppq->p->framebuffer.width;
58      unsigned int h = ppq->p->framebuffer.height;
59
60      util_blit_pixels(ppq->p->blitctx, in, 0, 0, 0,
61                       w, h, 0, ppq->tmps[0],
62                       0, 0, w, h, 0, PIPE_TEX_MIPFILTER_NEAREST);
63
64      in = ppq->tmp[0];
65   }
66
67   switch (ppq->n_filters) {
68   case 1:                     /* No temp buf */
69      ppq->pp_queue[0] (ppq, in, out, 0);
70      break;
71   case 2:                     /* One temp buf */
72
73      ppq->pp_queue[0] (ppq, in, ppq->tmp[0], 0);
74      ppq->pp_queue[1] (ppq, ppq->tmp[0], out, 1);
75
76      break;
77   default:                    /* Two temp bufs */
78      ppq->pp_queue[0] (ppq, in, ppq->tmp[0], 0);
79
80      for (i = 1; i < (ppq->n_filters - 1); i++) {
81         if (i % 2 == 0)
82            ppq->pp_queue[i] (ppq, ppq->tmp[1], ppq->tmp[0], i);
83
84         else
85            ppq->pp_queue[i] (ppq, ppq->tmp[0], ppq->tmp[1], i);
86      }
87
88      if (i % 2 == 0)
89         ppq->pp_queue[i] (ppq, ppq->tmp[1], out, i);
90
91      else
92         ppq->pp_queue[i] (ppq, ppq->tmp[0], out, i);
93
94      break;
95   }
96}
97
98
99/* Utility functions for the filters. You're not forced to use these if */
100/* your filter is more complicated. */
101
102/** Setup this resource as the filter input. */
103void
104pp_filter_setup_in(struct program *p, struct pipe_resource *in)
105{
106   struct pipe_sampler_view v_tmp;
107   u_sampler_view_default_template(&v_tmp, in, in->format);
108   p->view = p->pipe->create_sampler_view(p->pipe, in, &v_tmp);
109}
110
111/** Setup this resource as the filter output. */
112void
113pp_filter_setup_out(struct program *p, struct pipe_resource *out)
114{
115   p->surf.format = out->format;
116   p->surf.usage = PIPE_BIND_RENDER_TARGET;
117
118   p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, out, &p->surf);
119}
120
121/** Clean up the input and output set with the above. */
122void
123pp_filter_end_pass(struct program *p)
124{
125   pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
126   pipe_sampler_view_reference(&p->view, NULL);
127}
128
129/**
130*	Convert the TGSI assembly to a runnable shader.
131*
132* We need not care about geometry shaders. All we have is screen quads.
133*/
134void *
135pp_tgsi_to_state(struct pipe_context *pipe, const char *text, bool isvs,
136                 const char *name)
137{
138   struct pipe_shader_state state;
139   struct tgsi_token tokens[PP_MAX_TOKENS];
140
141   if (tgsi_text_translate(text, tokens, Elements(tokens)) == FALSE) {
142      pp_debug("Failed to translate %s\n", name);
143      return NULL;
144   }
145
146   state.tokens = tokens;
147
148   if (isvs)
149      return pipe->create_vs_state(pipe, &state);
150   else
151      return pipe->create_fs_state(pipe, &state);
152}
153
154/** Setup misc state for the filter. */
155void
156pp_filter_misc_state(struct program *p)
157{
158   cso_set_blend(p->cso, &p->blend);
159   cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
160   cso_set_rasterizer(p->cso, &p->rasterizer);
161   cso_set_viewport(p->cso, &p->viewport);
162
163   cso_set_vertex_elements(p->cso, 2, p->velem);
164}
165
166/** Draw with the filter to the set output. */
167void
168pp_filter_draw(struct program *p)
169{
170   util_draw_vertex_buffer(p->pipe, p->cso, p->vbuf, 0,
171                           PIPE_PRIM_QUADS, 4, 2);
172   p->pipe->flush(p->pipe, NULL);
173}
174
175/** Set the framebuffer as active. */
176void
177pp_filter_set_fb(struct program *p)
178{
179   cso_set_framebuffer(p->cso, &p->framebuffer);
180}
181
182/** Set the framebuffer as active and clear it. */
183void
184pp_filter_set_clear_fb(struct program *p)
185{
186   cso_set_framebuffer(p->cso, &p->framebuffer);
187   p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, p->clear_color, 0, 0);
188}
189