src/mesa/pipe/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 "pipe/p_util.h"
  35 #include "sp_context.h"
  36 #include "sp_headers.h"
  37 #include "sp_surface.h"
  38 #include "sp_quad.h"
  39 #include "sp_tile_cache.h"
  40
  41
  42
  43 /**
  44  * XXX colormask could be rolled into blending...
  45  */
  46 static void
  47 colormask_quad(struct quad_stage *qs, struct quad_header *quad)
  48 {
  49    struct softpipe_context *softpipe = qs->softpipe;
  50    float dest[4][QUAD_SIZE];
  51    struct softpipe_cached_tile *tile
  52       = sp_get_cached_tile(softpipe,
  53                            softpipe->cbuf_cache[softpipe->current_cbuf],
  54                            quad->x0, quad->y0);
  55    float (*quadColor)[4] = quad->outputs.color;
  56    uint i, j;
  57
  58    /* get/swizzle dest colors */
  59    for (j = 0; j < QUAD_SIZE; j++) {
  60       int x = (quad->x0 & (TILE_SIZE-1)) + (j & 1);
  61       int y = (quad->y0 & (TILE_SIZE-1)) + (j >> 1);
  62       for (i = 0; i < 4; i++) {
  63          dest[i][j] = tile->data.color[y][x][i];
  64       }
  65    }
  66
  67    /* R */
  68    if (!(softpipe->blend->colormask & PIPE_MASK_R))
  69        COPY_4V(quadColor[0], dest[0]);
  70
  71    /* G */
  72    if (!(softpipe->blend->colormask & PIPE_MASK_G))
  73        COPY_4V(quadColor[1], dest[1]);
  74
  75    /* B */
  76    if (!(softpipe->blend->colormask & PIPE_MASK_B))
  77        COPY_4V(quadColor[2], dest[2]);
  78
  79    /* A */
  80    if (!(softpipe->blend->colormask & PIPE_MASK_A))
  81        COPY_4V(quadColor[3], dest[3]);
  82
  83    /* pass quad to next stage */
  84    qs->next->run(qs->next, quad);
  85 }
  86
  87
  88 static void colormask_begin(struct quad_stage *qs)
  89 {
  90    qs->next->begin(qs->next);
  91 }
  92
  93
  94 static void colormask_destroy(struct quad_stage *qs)
  95 {
  96    FREE( qs );
  97 }
  98
  99
 100 struct quad_stage *sp_quad_colormask_stage( struct softpipe_context *softpipe )
 101 {
 102    struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
 103
 104    stage->softpipe = softpipe;
 105    stage->begin = colormask_begin;
 106    stage->run = colormask_quad;
 107    stage->destroy = colormask_destroy;
 108
 109    return stage;
 110 }