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
   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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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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 "main/glheader.h"
  34 #include "main/imports.h"
  35 #include "main/macros.h"
  36 #include "pipe/p_defines.h"
  37 #include "sp_context.h"
  38 #include "sp_headers.h"
  39 #include "sp_surface.h"
  40 #include "sp_quad.h"
  41
  42
  43
  44 static void
  45 colormask_quad(struct quad_stage *qs, struct quad_header *quad)
  46 {
  47    struct softpipe_context *softpipe = qs->softpipe;
  48    struct softpipe_surface *sps = softpipe_surface(softpipe->cbuf);
  49    GLfloat dest[4][QUAD_SIZE];
  50
  51    sps->read_quad_f_swz(sps, quad->x0, quad->y0, dest);
  52
  53    /* R */
  54    if (!(softpipe->blend.colormask & PIPE_MASK_R))
  55        COPY_4FV(quad->outputs.color[0], dest[0]);
  56
  57    /* G */
  58    if (!(softpipe->blend.colormask & PIPE_MASK_G))
  59        COPY_4FV(quad->outputs.color[1], dest[1]);
  60
  61    /* B */
  62    if (!(softpipe->blend.colormask & PIPE_MASK_B))
  63        COPY_4FV(quad->outputs.color[2], dest[2]);
  64
  65    /* A */
  66    if (!(softpipe->blend.colormask & PIPE_MASK_A))
  67        COPY_4FV(quad->outputs.color[3], dest[3]);
  68
  69    /* pass quad to next stage */
  70    qs->next->run(qs->next, quad);
  71 }
  72
  73
  74 static void colormask_begin(struct quad_stage *qs)
  75 {
  76    if (qs->next)
  77       qs->next->begin(qs->next);
  78 }
  79
  80
  81 struct quad_stage *sp_quad_colormask_stage( struct softpipe_context *softpipe )
  82 {
  83    struct quad_stage *stage = CALLOC_STRUCT(quad_stage);
  84
  85    stage->softpipe = softpipe;
  86    stage->begin = colormask_begin;
  87    stage->run = colormask_quad;
  88
  89    return stage;
  90 }