src/gallium/drivers/softpipe/sp_quad_colormask.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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
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  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.
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * \brief  quad colormask stage
  30  * \author Brian Paul
  31  */
  32
  33 #include "pipe/p_defines.h"
  34 #include "util/u_math.h"
  35 #include "util/u_memory.h"
  36 #include "sp_context.h"
  37 #include "sp_headers.h"
  38 #include "sp_surface.h"
  39 #include "sp_quad.h"
  40 #include "sp_tile_cache.h"
  41
  42
  43
  44 /**
  45  * XXX colormask could be rolled into blending...
  46  */
  47 static void
  48 colormask_quad(struct quad_stage *qs, struct quad_header *quad)
  49 {
  50    struct softpipe_context *softpipe = qs->softpipe;
  51    uint cbuf;
  52
  53    /* loop over colorbuffer outputs */
  54    for (cbuf = 0; cbuf < softpipe->framebuffer.nr_cbufs; cbuf++) {
  55       float dest[4][QUAD_SIZE];
  56       struct softpipe_cached_tile *tile
  57          = sp_get_cached_tile(softpipe,
  58                               softpipe->cbuf_cache[cbuf],
  59                               quad->input.x0, quad->input.y0);
  60       float (*quadColor)[4] = quad->output.color[cbuf];
  61       uint i, j;
  62
  63       /* get/swizzle dest colors */
  64       for (j = 0; j < QUAD_SIZE; j++) {
  65          int x = (quad->input.x0 & (TILE_SIZE-1)) + (j & 1);
  66          int y = (quad->input.y0 & (TILE_SIZE-1)) + (j >> 1);
  67          for (i = 0; i < 4; i++) {
  68             dest[i][j] = tile->data.color[y][x][i];
  69          }
  70       }
  71
  72       /* R */
  73       if (!(softpipe->blend->colormask & PIPE_MASK_R))
  74           COPY_4V(quadColor[0], dest[0]);
  75
  76       /* G */
  77       if (!(softpipe->blend->colormask & PIPE_MASK_G))
  78           COPY_4V(quadColor[1], dest[1]);
  79
  80       /* B */
  81       if (!(softpipe->blend->colormask & PIPE_MASK_B))
  82           COPY_4V(quadColor[2], dest[2]);
  83
  84       /* A */
  85       if (!(softpipe->blend->colormask & PIPE_MASK_A))
  86           COPY_4V(quadColor[3], dest[3]);
  87    }
  88
  89    /* pass quad to next stage */
  90    qs->next->run(qs->next, quad);
  91 }
  92
  93
  94 static void colormask_begin(struct quad_stage *qs)
  95 {
  96    qs->next->begin(qs->next);
  97 }
  98
  99
 100 static void colormask_destroy(struct quad_stage *qs)
 101 {
 102    FREE( qs );
 103 }
 104
 105
 106 struct quad_stage *sp_quad_colormask_stage( struct softpipe_context *softpipe )
 107 {
 108    struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
 109
 110    stage->softpipe = softpipe;
 111    stage->begin = colormask_begin;
 112    stage->run = colormask_quad;
 113    stage->destroy = colormask_destroy;
 114
 115    return stage;
 116 }