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  1. /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
  2.  
  3. /*
  4.  * Copyright (C) 2012-2013 Rob Clark <robclark@freedesktop.org>
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the "Software"),
  8.  * to deal in the Software without restriction, including without limitation
  9.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10.  * and/or sell copies of the Software, and to permit persons to whom the
  11.  * Software is furnished to do so, subject to the following conditions:
  12.  *
  13.  * The above copyright notice and this permission notice (including the next
  14.  * paragraph) shall be included in all copies or substantial portions of the
  15.  * Software.
  16.  *
  17.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22.  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23.  * SOFTWARE.
  24.  *
  25.  * Authors:
  26.  *    Rob Clark <robclark@freedesktop.org>
  27.  */
  28.  
  29. #include "pipe/p_state.h"
  30. #include "util/u_string.h"
  31. #include "util/u_memory.h"
  32.  
  33. #include "fd2_blend.h"
  34. #include "fd2_context.h"
  35. #include "fd2_util.h"
  36.  
  37.  
  38. static enum a2xx_rb_blend_opcode
  39. blend_func(unsigned func)
  40. {
  41.         switch (func) {
  42.         case PIPE_BLEND_ADD:
  43.                 return BLEND_DST_PLUS_SRC;
  44.         case PIPE_BLEND_MIN:
  45.                 return BLEND_MIN_DST_SRC;
  46.         case PIPE_BLEND_MAX:
  47.                 return BLEND_MAX_DST_SRC;
  48.         case PIPE_BLEND_SUBTRACT:
  49.                 return BLEND_SRC_MINUS_DST;
  50.         case PIPE_BLEND_REVERSE_SUBTRACT:
  51.                 return BLEND_DST_MINUS_SRC;
  52.         default:
  53.                 DBG("invalid blend func: %x", func);
  54.                 return 0;
  55.         }
  56. }
  57.  
  58. void *
  59. fd2_blend_state_create(struct pipe_context *pctx,
  60.                 const struct pipe_blend_state *cso)
  61. {
  62.         const struct pipe_rt_blend_state *rt = &cso->rt[0];
  63.         struct fd2_blend_stateobj *so;
  64.  
  65.         if (cso->logicop_enable) {
  66.                 DBG("Unsupported! logicop");
  67.                 return NULL;
  68.         }
  69.  
  70.         if (cso->independent_blend_enable) {
  71.                 DBG("Unsupported! independent blend state");
  72.                 return NULL;
  73.         }
  74.  
  75.         so = CALLOC_STRUCT(fd2_blend_stateobj);
  76.         if (!so)
  77.                 return NULL;
  78.  
  79.         so->base = *cso;
  80.  
  81.         so->rb_colorcontrol = A2XX_RB_COLORCONTROL_ROP_CODE(12);
  82.  
  83.         so->rb_blendcontrol =
  84.                 A2XX_RB_BLEND_CONTROL_COLOR_SRCBLEND(fd_blend_factor(rt->rgb_src_factor)) |
  85.                 A2XX_RB_BLEND_CONTROL_COLOR_COMB_FCN(blend_func(rt->rgb_func)) |
  86.                 A2XX_RB_BLEND_CONTROL_COLOR_DESTBLEND(fd_blend_factor(rt->rgb_dst_factor)) |
  87.                 A2XX_RB_BLEND_CONTROL_ALPHA_SRCBLEND(fd_blend_factor(rt->alpha_src_factor)) |
  88.                 A2XX_RB_BLEND_CONTROL_ALPHA_COMB_FCN(blend_func(rt->alpha_func)) |
  89.                 A2XX_RB_BLEND_CONTROL_ALPHA_DESTBLEND(fd_blend_factor(rt->alpha_dst_factor));
  90.  
  91.         if (rt->colormask & PIPE_MASK_R)
  92.                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_RED;
  93.         if (rt->colormask & PIPE_MASK_G)
  94.                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_GREEN;
  95.         if (rt->colormask & PIPE_MASK_B)
  96.                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_BLUE;
  97.         if (rt->colormask & PIPE_MASK_A)
  98.                 so->rb_colormask |= A2XX_RB_COLOR_MASK_WRITE_ALPHA;
  99.  
  100.         if (!rt->blend_enable)
  101.                 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_BLEND_DISABLE;
  102.  
  103.         if (cso->dither)
  104.                 so->rb_colorcontrol |= A2XX_RB_COLORCONTROL_DITHER_MODE(DITHER_ALWAYS);
  105.  
  106.         return so;
  107. }
  108.