src/gallium/drivers/llvmpipe/lp_state_blend.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29 /**
  30  * @author Jose Fonseca <jfonseca@vmware.com>
  31  * @author Keith Whitwell <keith@tungstengraphics.com>
  32  */
  33
  34 #include "util/u_memory.h"
  35 #include "util/u_math.h"
  36 #include "util/u_dump.h"
  37 #include "draw/draw_context.h"
  38 #include "lp_screen.h"
  39 #include "lp_context.h"
  40 #include "lp_state.h"
  41
  42
  43 static void *
  44 llvmpipe_create_blend_state(struct pipe_context *pipe,
  45                             const struct pipe_blend_state *blend)
  46 {
  47    return mem_dup(blend, sizeof(*blend));
  48 }
  49
  50
  51 static void
  52 llvmpipe_bind_blend_state(struct pipe_context *pipe, void *blend)
  53 {
  54    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  55
  56    if (llvmpipe->blend == blend)
  57       return;
  58
  59    draw_flush(llvmpipe->draw);
  60
  61    llvmpipe->blend = blend;
  62
  63    llvmpipe->dirty |= LP_NEW_BLEND;
  64 }
  65
  66
  67 static void
  68 llvmpipe_delete_blend_state(struct pipe_context *pipe, void *blend)
  69 {
  70    FREE( blend );
  71 }
  72
  73
  74 static void
  75 llvmpipe_set_blend_color(struct pipe_context *pipe,
  76                          const struct pipe_blend_color *blend_color)
  77 {
  78    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  79
  80    if(!blend_color)
  81       return;
  82
  83    if(memcmp(&llvmpipe->blend_color, blend_color, sizeof *blend_color) == 0)
  84       return;
  85
  86    draw_flush(llvmpipe->draw);
  87
  88    memcpy(&llvmpipe->blend_color, blend_color, sizeof *blend_color);
  89
  90    llvmpipe->dirty |= LP_NEW_BLEND_COLOR;
  91 }
  92
  93
  94 /** XXX move someday?  Or consolidate all these simple state setters
  95  * into one file.
  96  */
  97
  98
  99 static void *
 100 llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,
 101                                     const struct pipe_depth_stencil_alpha_state *depth_stencil)
 102 {
 103    return mem_dup(depth_stencil, sizeof(*depth_stencil));
 104 }
 105
 106
 107 static void
 108 llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,
 109                                   void *depth_stencil)
 110 {
 111    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 112
 113    if (llvmpipe->depth_stencil == depth_stencil)
 114       return;
 115
 116    draw_flush(llvmpipe->draw);
 117
 118    llvmpipe->depth_stencil = depth_stencil;
 119
 120    llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
 121 }
 122
 123
 124 static void
 125 llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)
 126 {
 127    FREE( depth );
 128 }
 129
 130
 131 static void
 132 llvmpipe_set_stencil_ref(struct pipe_context *pipe,
 133                          const struct pipe_stencil_ref *stencil_ref)
 134 {
 135    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 136
 137    if(!stencil_ref)
 138       return;
 139
 140    if(memcmp(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref) == 0)
 141       return;
 142
 143    draw_flush(llvmpipe->draw);
 144
 145    memcpy(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref);
 146
 147    /* not sure. want new flag? */
 148    llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
 149 }
 150
 151
 152 void
 153 llvmpipe_init_blend_funcs(struct llvmpipe_context *llvmpipe)
 154 {
 155    llvmpipe->pipe.create_blend_state = llvmpipe_create_blend_state;
 156    llvmpipe->pipe.bind_blend_state   = llvmpipe_bind_blend_state;
 157    llvmpipe->pipe.delete_blend_state = llvmpipe_delete_blend_state;
 158
 159    llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;
 160    llvmpipe->pipe.bind_depth_stencil_alpha_state   = llvmpipe_bind_depth_stencil_state;
 161    llvmpipe->pipe.delete_depth_stencil_alpha_state = llvmpipe_delete_depth_stencil_state;
 162
 163    llvmpipe->pipe.set_blend_color = llvmpipe_set_blend_color;
 164
 165    llvmpipe->pipe.set_stencil_ref = llvmpipe_set_stencil_ref;
 166 }