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    struct pipe_resource *refin = NULL, *refout = NULL;
  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);
  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    // Kept only for this frame.
  68    pipe_resource_reference(&ppq->depth, indepth);
  69    pipe_resource_reference(&refin, in);
  70    pipe_resource_reference(&refout, out);
  71
  72    switch (ppq->n_filters) {
  73    case 1:                     /* No temp buf */
  74       ppq->pp_queue[0] (ppq, in, out, 0);
  75       break;
  76    case 2:                     /* One temp buf */
  77
  78       ppq->pp_queue[0] (ppq, in, ppq->tmp[0], 0);
  79       ppq->pp_queue[1] (ppq, ppq->tmp[0], out, 1);
  80
  81       break;
  82    default:                    /* Two temp bufs */
  83       ppq->pp_queue[0] (ppq, in, ppq->tmp[0], 0);
  84
  85       for (i = 1; i < (ppq->n_filters - 1); i++) {
  86          if (i % 2 == 0)
  87             ppq->pp_queue[i] (ppq, ppq->tmp[1], ppq->tmp[0], i);
  88
  89          else
  90             ppq->pp_queue[i] (ppq, ppq->tmp[0], ppq->tmp[1], i);
  91       }
  92
  93       if (i % 2 == 0)
  94          ppq->pp_queue[i] (ppq, ppq->tmp[1], out, i);
  95
  96       else
  97          ppq->pp_queue[i] (ppq, ppq->tmp[0], out, i);
  98
  99       break;
 100    }
 101
 102    pipe_resource_reference(&ppq->depth, NULL);
 103    pipe_resource_reference(&refin, NULL);
 104    pipe_resource_reference(&refout, NULL);
 105 }
 106
 107
 108 /* Utility functions for the filters. You're not forced to use these if */
 109 /* your filter is more complicated. */
 110
 111 /** Setup this resource as the filter input. */
 112 void
 113 pp_filter_setup_in(struct program *p, struct pipe_resource *in)
 114 {
 115    struct pipe_sampler_view v_tmp;
 116    u_sampler_view_default_template(&v_tmp, in, in->format);
 117    p->view = p->pipe->create_sampler_view(p->pipe, in, &v_tmp);
 118 }
 119
 120 /** Setup this resource as the filter output. */
 121 void
 122 pp_filter_setup_out(struct program *p, struct pipe_resource *out)
 123 {
 124    p->surf.format = out->format;
 125    p->surf.usage = PIPE_BIND_RENDER_TARGET;
 126
 127    p->framebuffer.cbufs[0] = p->pipe->create_surface(p->pipe, out, &p->surf);
 128 }
 129
 130 /** Clean up the input and output set with the above. */
 131 void
 132 pp_filter_end_pass(struct program *p)
 133 {
 134    pipe_surface_reference(&p->framebuffer.cbufs[0], NULL);
 135    pipe_sampler_view_reference(&p->view, NULL);
 136 }
 137
 138 /**
 139 *       Convert the TGSI assembly to a runnable shader.
 140 *
 141 * We need not care about geometry shaders. All we have is screen quads.
 142 */
 143 void *
 144 pp_tgsi_to_state(struct pipe_context *pipe, const char *text, bool isvs,
 145                  const char *name)
 146 {
 147    struct pipe_shader_state state;
 148    struct tgsi_token tokens[PP_MAX_TOKENS];
 149
 150    if (tgsi_text_translate(text, tokens, Elements(tokens)) == FALSE) {
 151       pp_debug("Failed to translate %s\n", name);
 152       return NULL;
 153    }
 154
 155    state.tokens = tokens;
 156    memset(&state.stream_output, 0, sizeof(state.stream_output));
 157
 158    if (isvs)
 159       return pipe->create_vs_state(pipe, &state);
 160    else
 161       return pipe->create_fs_state(pipe, &state);
 162 }
 163
 164 /** Setup misc state for the filter. */
 165 void
 166 pp_filter_misc_state(struct program *p)
 167 {
 168    cso_set_blend(p->cso, &p->blend);
 169    cso_set_depth_stencil_alpha(p->cso, &p->depthstencil);
 170    cso_set_rasterizer(p->cso, &p->rasterizer);
 171    cso_set_viewport(p->cso, &p->viewport);
 172
 173    cso_set_vertex_elements(p->cso, 2, p->velem);
 174 }
 175
 176 /** Draw with the filter to the set output. */
 177 void
 178 pp_filter_draw(struct program *p)
 179 {
 180    util_draw_vertex_buffer(p->pipe, p->cso, p->vbuf, 0,
 181                            PIPE_PRIM_QUADS, 4, 2);
 182    p->pipe->flush(p->pipe, NULL);
 183 }
 184
 185 /** Set the framebuffer as active. */
 186 void
 187 pp_filter_set_fb(struct program *p)
 188 {
 189    cso_set_framebuffer(p->cso, &p->framebuffer);
 190 }
 191
 192 /** Set the framebuffer as active and clear it. */
 193 void
 194 pp_filter_set_clear_fb(struct program *p)
 195 {
 196    cso_set_framebuffer(p->cso, &p->framebuffer);
 197    p->pipe->clear(p->pipe, PIPE_CLEAR_COLOR, &p->clear_color, 0, 0);
 198 }