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 #include "lp_debug.h"
  42
  43
  44 static void *
  45 llvmpipe_create_blend_state(struct pipe_context *pipe,
  46                             const struct pipe_blend_state *blend)
  47 {
  48    struct pipe_blend_state *state = mem_dup(blend, sizeof *blend);
  49    int i;
  50
  51    if (LP_PERF & PERF_NO_BLEND) {
  52       state->independent_blend_enable = 0;
  53       for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++)
  54          state->rt[i].blend_enable = 0;
  55    }
  56
  57    return state;
  58 }
  59
  60
  61 static void
  62 llvmpipe_bind_blend_state(struct pipe_context *pipe, void *blend)
  63 {
  64    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  65
  66    if (llvmpipe->blend == blend)
  67       return;
  68
  69    draw_flush(llvmpipe->draw);
  70
  71    llvmpipe->blend = blend;
  72
  73    llvmpipe->dirty |= LP_NEW_BLEND;
  74 }
  75
  76
  77 static void
  78 llvmpipe_delete_blend_state(struct pipe_context *pipe, void *blend)
  79 {
  80    FREE( blend );
  81 }
  82
  83
  84 static void
  85 llvmpipe_set_blend_color(struct pipe_context *pipe,
  86                          const struct pipe_blend_color *blend_color)
  87 {
  88    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  89
  90    if(!blend_color)
  91       return;
  92
  93    if(memcmp(&llvmpipe->blend_color, blend_color, sizeof *blend_color) == 0)
  94       return;
  95
  96    draw_flush(llvmpipe->draw);
  97
  98    memcpy(&llvmpipe->blend_color, blend_color, sizeof *blend_color);
  99
 100    llvmpipe->dirty |= LP_NEW_BLEND_COLOR;
 101 }
 102
 103
 104 /** XXX move someday?  Or consolidate all these simple state setters
 105  * into one file.
 106  */
 107
 108
 109 static void *
 110 llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,
 111                                     const struct pipe_depth_stencil_alpha_state *depth_stencil)
 112 {
 113    struct pipe_depth_stencil_alpha_state *state;
 114
 115    state = mem_dup(depth_stencil, sizeof *depth_stencil);
 116
 117    if (LP_PERF & PERF_NO_DEPTH) {
 118       state->depth.enabled = 0;
 119       state->depth.writemask = 0;
 120       state->stencil[0].enabled = 0;
 121       state->stencil[1].enabled = 0;
 122    }
 123
 124    if (LP_PERF & PERF_NO_ALPHATEST) {
 125       state->alpha.enabled = 0;
 126    }
 127
 128    return state;
 129 }
 130
 131
 132 static void
 133 llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,
 134                                   void *depth_stencil)
 135 {
 136    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 137
 138    if (llvmpipe->depth_stencil == depth_stencil)
 139       return;
 140
 141    draw_flush(llvmpipe->draw);
 142
 143    llvmpipe->depth_stencil = depth_stencil;
 144
 145    llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
 146 }
 147
 148
 149 static void
 150 llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)
 151 {
 152    FREE( depth );
 153 }
 154
 155
 156 static void
 157 llvmpipe_set_stencil_ref(struct pipe_context *pipe,
 158                          const struct pipe_stencil_ref *stencil_ref)
 159 {
 160    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 161
 162    if(!stencil_ref)
 163       return;
 164
 165    if(memcmp(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref) == 0)
 166       return;
 167
 168    draw_flush(llvmpipe->draw);
 169
 170    memcpy(&llvmpipe->stencil_ref, stencil_ref, sizeof *stencil_ref);
 171
 172    /* not sure. want new flag? */
 173    llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
 174 }
 175
 176 static void
 177 llvmpipe_set_sample_mask(struct pipe_context *pipe,
 178                          unsigned sample_mask)
 179 {
 180 }
 181
 182 void
 183 llvmpipe_init_blend_funcs(struct llvmpipe_context *llvmpipe)
 184 {
 185    llvmpipe->pipe.create_blend_state = llvmpipe_create_blend_state;
 186    llvmpipe->pipe.bind_blend_state   = llvmpipe_bind_blend_state;
 187    llvmpipe->pipe.delete_blend_state = llvmpipe_delete_blend_state;
 188
 189    llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;
 190    llvmpipe->pipe.bind_depth_stencil_alpha_state   = llvmpipe_bind_depth_stencil_state;
 191    llvmpipe->pipe.delete_depth_stencil_alpha_state = llvmpipe_delete_depth_stencil_state;
 192
 193    llvmpipe->pipe.set_blend_color = llvmpipe_set_blend_color;
 194
 195    llvmpipe->pipe.set_stencil_ref = llvmpipe_set_stencil_ref;
 196    llvmpipe->pipe.set_sample_mask = llvmpipe_set_sample_mask;
 197 }