src/gallium/auxiliary/postprocess/pp_run.c

   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 */
  41 void
  42 pp_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. */
 103 void
 104 pp_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. */
 112 void
 113 pp_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. */
 122 void
 123 pp_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 */
 134 void *
 135 pp_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. */
 155 void
 156 pp_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. */
 167 void
 168 pp_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. */
 176 void
 177 pp_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. */
 183 void
 184 pp_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 }