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_debug_dump.h"
  37 #include "lp_screen.h"
  38 #include "lp_context.h"
  39 #include "lp_state.h"
  40
  41 #include "lp_bld_type.h"
  42 #include "lp_bld_arit.h"
  43 #include "lp_bld_logic.h"
  44 #include "lp_bld_blend.h"
  45 #include "lp_bld_debug.h"
  46
  47
  48 static void
  49 blend_generate(struct llvmpipe_screen *screen,
  50                struct lp_blend_state *blend)
  51 {
  52    union lp_type type;
  53    struct lp_build_context bld;
  54    LLVMTypeRef vec_type;
  55    LLVMTypeRef int_vec_type;
  56    LLVMTypeRef arg_types[4];
  57    LLVMTypeRef func_type;
  58    LLVMValueRef mask_ptr;
  59    LLVMValueRef src_ptr;
  60    LLVMValueRef dst_ptr;
  61    LLVMValueRef const_ptr;
  62    LLVMBasicBlockRef block;
  63    LLVMBuilderRef builder;
  64    LLVMValueRef mask;
  65    LLVMValueRef src[4];
  66    LLVMValueRef con[4];
  67    LLVMValueRef dst[4];
  68    LLVMValueRef res[4];
  69    unsigned i;
  70
  71    type.value = 0;
  72    type.floating = FALSE;
  73    type.sign = FALSE;
  74    type.norm = TRUE;
  75    type.width = 8;
  76    type.length = 16;
  77
  78    vec_type = lp_build_vec_type(type);
  79    int_vec_type = lp_build_int_vec_type(type);
  80
  81    arg_types[0] = LLVMPointerType(int_vec_type, 0); /* mask */
  82    arg_types[1] = LLVMPointerType(vec_type, 0);     /* src */
  83    arg_types[2] = LLVMPointerType(vec_type, 0);     /* con */
  84    arg_types[3] = LLVMPointerType(vec_type, 0);     /* dst */
  85    func_type = LLVMFunctionType(LLVMVoidType(), arg_types, Elements(arg_types), 0);
  86    blend->function = LLVMAddFunction(screen->module, "blend", func_type);
  87    LLVMSetFunctionCallConv(blend->function, LLVMCCallConv);
  88
  89    mask_ptr = LLVMGetParam(blend->function, 0);
  90    src_ptr = LLVMGetParam(blend->function, 1);
  91    const_ptr = LLVMGetParam(blend->function, 2);
  92    dst_ptr = LLVMGetParam(blend->function, 3);
  93
  94    block = LLVMAppendBasicBlock(blend->function, "entry");
  95    builder = LLVMCreateBuilder();
  96    LLVMPositionBuilderAtEnd(builder, block);
  97
  98    lp_build_context_init(&bld, builder, type);
  99
 100    mask = LLVMBuildLoad(builder, mask_ptr, "mask");
 101
 102    for(i = 0; i < 4; ++i) {
 103       LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0);
 104
 105       src[i] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, src_ptr, &index, 1, ""), "");
 106       con[i] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, const_ptr, &index, 1, ""), "");
 107       dst[i] = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dst_ptr, &index, 1, ""), "");
 108
 109       lp_build_name(src[i], "src.%c", "rgba"[i]);
 110       lp_build_name(con[i], "con.%c", "rgba"[i]);
 111       lp_build_name(dst[i], "dst.%c", "rgba"[i]);
 112    }
 113
 114    lp_build_blend_soa(builder, &blend->base, type, src, dst, con, res);
 115
 116    for(i = 0; i < 4; ++i) {
 117       LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), i, 0);
 118       lp_build_name(res[i], "res.%c", "rgba"[i]);
 119       res[i] = lp_build_select(&bld, mask, res[i], dst[i]);
 120       LLVMBuildStore(builder, res[i], LLVMBuildGEP(builder, dst_ptr, &index, 1, ""));
 121    }
 122
 123    LLVMBuildRetVoid(builder);;
 124
 125    LLVMDisposeBuilder(builder);
 126 }
 127
 128
 129 void *
 130 llvmpipe_create_blend_state(struct pipe_context *pipe,
 131                             const struct pipe_blend_state *base)
 132 {
 133    struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
 134    struct lp_blend_state *blend;
 135
 136    blend = CALLOC_STRUCT(lp_blend_state);
 137    if(!blend)
 138       return NULL;
 139
 140    blend->base = *base;
 141
 142    blend_generate(screen, blend);
 143
 144    LLVMRunFunctionPassManager(screen->pass, blend->function);
 145
 146 #ifdef DEBUG
 147    debug_printf("%s=%s %s=%s %s=%s %s=%s %s=%s %s=%s\n",
 148                 "rgb_func",         debug_dump_blend_func  (blend->base.rgb_func, TRUE),
 149                 "rgb_src_factor",   debug_dump_blend_factor(blend->base.rgb_src_factor, TRUE),
 150                 "rgb_dst_factor",   debug_dump_blend_factor(blend->base.rgb_dst_factor, TRUE),
 151                 "alpha_func",       debug_dump_blend_func  (blend->base.alpha_func, TRUE),
 152                 "alpha_src_factor", debug_dump_blend_factor(blend->base.alpha_src_factor, TRUE),
 153                 "alpha_dst_factor", debug_dump_blend_factor(blend->base.alpha_dst_factor, TRUE));
 154    LLVMDumpValue(blend->function);
 155    debug_printf("\n");
 156 #endif
 157
 158    if(LLVMVerifyFunction(blend->function, LLVMPrintMessageAction)) {
 159       LLVMDumpValue(blend->function);
 160       abort();
 161    }
 162
 163    blend->jit_function = (lp_blend_func)LLVMGetPointerToGlobal(screen->engine, blend->function);
 164
 165 #ifdef DEBUG
 166    lp_disassemble(blend->jit_function);
 167 #endif
 168
 169    return blend;
 170 }
 171
 172 void llvmpipe_bind_blend_state( struct pipe_context *pipe,
 173                                 void *blend )
 174 {
 175    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 176
 177    llvmpipe->blend = (struct lp_blend_state *)blend;
 178
 179    llvmpipe->dirty |= LP_NEW_BLEND;
 180 }
 181
 182 void llvmpipe_delete_blend_state(struct pipe_context *pipe,
 183                                  void *_blend)
 184 {
 185    struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
 186    struct lp_blend_state *blend = (struct lp_blend_state *)_blend;
 187
 188    if(blend->function) {
 189       if(blend->jit_function)
 190          LLVMFreeMachineCodeForFunction(screen->engine, blend->function);
 191       LLVMDeleteFunction(blend->function);
 192    }
 193
 194    FREE( blend );
 195 }
 196
 197
 198 void llvmpipe_set_blend_color( struct pipe_context *pipe,
 199                              const struct pipe_blend_color *blend_color )
 200 {
 201    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 202    unsigned i, j;
 203
 204    for (i = 0; i < 4; ++i)
 205       for (j = 0; j < 16; ++j)
 206          llvmpipe->blend_color[i][j] = float_to_ubyte(blend_color->color[i]);
 207
 208    llvmpipe->dirty |= LP_NEW_BLEND;
 209 }
 210
 211
 212 /** XXX move someday?  Or consolidate all these simple state setters
 213  * into one file.
 214  */
 215
 216
 217 void *
 218 llvmpipe_create_depth_stencil_state(struct pipe_context *pipe,
 219                                     const struct pipe_depth_stencil_alpha_state *depth_stencil)
 220 {
 221    return mem_dup(depth_stencil, sizeof(*depth_stencil));
 222 }
 223
 224 void
 225 llvmpipe_bind_depth_stencil_state(struct pipe_context *pipe,
 226                                   void *depth_stencil)
 227 {
 228    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 229
 230    llvmpipe->depth_stencil = (const struct pipe_depth_stencil_alpha_state *)depth_stencil;
 231
 232    llvmpipe->dirty |= LP_NEW_DEPTH_STENCIL_ALPHA;
 233 }
 234
 235 void
 236 llvmpipe_delete_depth_stencil_state(struct pipe_context *pipe, void *depth)
 237 {
 238    FREE( depth );
 239 }