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      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 (at) vmware.com>
     31  * @author Keith Whitwell <keith (at) 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 }
    198