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_quad.h"
  38 #include "sp_surface.h"
  39 #include "sp_quad_pipe.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->cbuf_cache[cbuf],
  58                               quad->input.x0, quad->input.y0);
  59       float (*quadColor)[4] = quad->output.color[cbuf];
  60       uint i, j;
  61
  62       /* get/swizzle dest colors */
  63       for (j = 0; j < QUAD_SIZE; j++) {
  64          int x = (quad->input.x0 & (TILE_SIZE-1)) + (j & 1);
  65          int y = (quad->input.y0 & (TILE_SIZE-1)) + (j >> 1);
  66          for (i = 0; i < 4; i++) {
  67             dest[i][j] = tile->data.color[y][x][i];
  68          }
  69       }
  70
  71       /* R */
  72       if (!(softpipe->blend->colormask & PIPE_MASK_R))
  73           COPY_4V(quadColor[0], dest[0]);
  74
  75       /* G */
  76       if (!(softpipe->blend->colormask & PIPE_MASK_G))
  77           COPY_4V(quadColor[1], dest[1]);
  78
  79       /* B */
  80       if (!(softpipe->blend->colormask & PIPE_MASK_B))
  81           COPY_4V(quadColor[2], dest[2]);
  82
  83       /* A */
  84       if (!(softpipe->blend->colormask & PIPE_MASK_A))
  85           COPY_4V(quadColor[3], dest[3]);
  86    }
  87
  88    /* pass quad to next stage */
  89    qs->next->run(qs->next, quad);
  90 }
  91
  92
  93 static void colormask_begin(struct quad_stage *qs)
  94 {
  95    qs->next->begin(qs->next);
  96 }
  97
  98
  99 static void colormask_destroy(struct quad_stage *qs)
 100 {
 101    FREE( qs );
 102 }
 103
 104
 105 struct quad_stage *sp_quad_colormask_stage( struct softpipe_context *softpipe )
 106 {
 107    struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
 108
 109    stage->softpipe = softpipe;
 110    stage->begin = colormask_begin;
 111    stage->run = colormask_quad;
 112    stage->destroy = colormask_destroy;
 113
 114    return stage;
 115 }