src/gallium/drivers/i965/brw_pipe_blend.c

   1
   2 #include "util/u_memory.h"
   3 #include "pipe/p_context.h"
   4 #include "pipe/p_state.h"
   5
   6 #include "brw_context.h"
   7 #include "brw_defines.h"
   8 #include "brw_debug.h"
   9
  10 static int translate_logicop(unsigned logicop)
  11 {
  12    switch (logicop) {
  13    case PIPE_LOGICOP_CLEAR:
  14       return BRW_LOGICOPFUNCTION_CLEAR;
  15    case PIPE_LOGICOP_AND:
  16       return BRW_LOGICOPFUNCTION_AND;
  17    case PIPE_LOGICOP_AND_REVERSE:
  18       return BRW_LOGICOPFUNCTION_AND_REVERSE;
  19    case PIPE_LOGICOP_COPY:
  20       return BRW_LOGICOPFUNCTION_COPY;
  21    case PIPE_LOGICOP_COPY_INVERTED:
  22       return BRW_LOGICOPFUNCTION_COPY_INVERTED;
  23    case PIPE_LOGICOP_AND_INVERTED:
  24       return BRW_LOGICOPFUNCTION_AND_INVERTED;
  25    case PIPE_LOGICOP_NOOP:
  26       return BRW_LOGICOPFUNCTION_NOOP;
  27    case PIPE_LOGICOP_XOR:
  28       return BRW_LOGICOPFUNCTION_XOR;
  29    case PIPE_LOGICOP_OR:
  30       return BRW_LOGICOPFUNCTION_OR;
  31    case PIPE_LOGICOP_OR_INVERTED:
  32       return BRW_LOGICOPFUNCTION_OR_INVERTED;
  33    case PIPE_LOGICOP_NOR:
  34       return BRW_LOGICOPFUNCTION_NOR;
  35    case PIPE_LOGICOP_EQUIV:
  36       return BRW_LOGICOPFUNCTION_EQUIV;
  37    case PIPE_LOGICOP_INVERT:
  38       return BRW_LOGICOPFUNCTION_INVERT;
  39    case PIPE_LOGICOP_OR_REVERSE:
  40       return BRW_LOGICOPFUNCTION_OR_REVERSE;
  41    case PIPE_LOGICOP_NAND:
  42       return BRW_LOGICOPFUNCTION_NAND;
  43    case PIPE_LOGICOP_SET:
  44       return BRW_LOGICOPFUNCTION_SET;
  45    default:
  46       assert(0);
  47       return BRW_LOGICOPFUNCTION_SET;
  48    }
  49 }
  50
  51
  52 static unsigned translate_blend_equation( unsigned mode )
  53 {
  54    switch (mode) {
  55    case PIPE_BLEND_ADD:
  56       return BRW_BLENDFUNCTION_ADD;
  57    case PIPE_BLEND_MIN:
  58       return BRW_BLENDFUNCTION_MIN;
  59    case PIPE_BLEND_MAX:
  60       return BRW_BLENDFUNCTION_MAX;
  61    case PIPE_BLEND_SUBTRACT:
  62       return BRW_BLENDFUNCTION_SUBTRACT;
  63    case PIPE_BLEND_REVERSE_SUBTRACT:
  64       return BRW_BLENDFUNCTION_REVERSE_SUBTRACT;
  65    default:
  66       assert(0);
  67       return BRW_BLENDFUNCTION_ADD;
  68    }
  69 }
  70
  71 static unsigned translate_blend_factor( unsigned factor )
  72 {
  73    switch(factor) {
  74    case PIPE_BLENDFACTOR_ZERO:
  75       return BRW_BLENDFACTOR_ZERO;
  76    case PIPE_BLENDFACTOR_SRC_ALPHA:
  77       return BRW_BLENDFACTOR_SRC_ALPHA;
  78    case PIPE_BLENDFACTOR_ONE:
  79       return BRW_BLENDFACTOR_ONE;
  80    case PIPE_BLENDFACTOR_SRC_COLOR:
  81       return BRW_BLENDFACTOR_SRC_COLOR;
  82    case PIPE_BLENDFACTOR_INV_SRC_COLOR:
  83       return BRW_BLENDFACTOR_INV_SRC_COLOR;
  84    case PIPE_BLENDFACTOR_DST_COLOR:
  85       return BRW_BLENDFACTOR_DST_COLOR;
  86    case PIPE_BLENDFACTOR_INV_DST_COLOR:
  87       return BRW_BLENDFACTOR_INV_DST_COLOR;
  88    case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
  89       return BRW_BLENDFACTOR_INV_SRC_ALPHA;
  90    case PIPE_BLENDFACTOR_DST_ALPHA:
  91       return BRW_BLENDFACTOR_DST_ALPHA;
  92    case PIPE_BLENDFACTOR_INV_DST_ALPHA:
  93       return BRW_BLENDFACTOR_INV_DST_ALPHA;
  94    case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
  95       return BRW_BLENDFACTOR_SRC_ALPHA_SATURATE;
  96    case PIPE_BLENDFACTOR_CONST_COLOR:
  97       return BRW_BLENDFACTOR_CONST_COLOR;
  98    case PIPE_BLENDFACTOR_INV_CONST_COLOR:
  99       return BRW_BLENDFACTOR_INV_CONST_COLOR;
 100    case PIPE_BLENDFACTOR_CONST_ALPHA:
 101       return BRW_BLENDFACTOR_CONST_ALPHA;
 102    case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
 103       return BRW_BLENDFACTOR_INV_CONST_ALPHA;
 104    default:
 105       assert(0);
 106       return BRW_BLENDFACTOR_ZERO;
 107    }
 108 }
 109
 110 static void *brw_create_blend_state( struct pipe_context *pipe,
 111                                      const struct pipe_blend_state *templ )
 112 {
 113    struct brw_blend_state *blend = CALLOC_STRUCT(brw_blend_state);
 114    if (blend == NULL)
 115       return NULL;
 116
 117    if (templ->logicop_enable) {
 118       blend->cc2.logicop_enable = 1;
 119       blend->cc5.logicop_func = translate_logicop(templ->logicop_func);
 120    }
 121    else if (templ->rt[0].blend_enable) {
 122       blend->cc6.dest_blend_factor = translate_blend_factor(templ->rt[0].rgb_dst_factor);
 123       blend->cc6.src_blend_factor = translate_blend_factor(templ->rt[0].rgb_src_factor);
 124       blend->cc6.blend_function = translate_blend_equation(templ->rt[0].rgb_func);
 125
 126       blend->cc5.ia_dest_blend_factor = translate_blend_factor(templ->rt[0].alpha_dst_factor);
 127       blend->cc5.ia_src_blend_factor = translate_blend_factor(templ->rt[0].alpha_src_factor);
 128       blend->cc5.ia_blend_function = translate_blend_equation(templ->rt[0].alpha_func);
 129
 130       blend->cc3.blend_enable = 1;
 131       blend->cc3.ia_blend_enable =
 132          (blend->cc6.dest_blend_factor != blend->cc5.ia_dest_blend_factor ||
 133           blend->cc6.src_blend_factor != blend->cc5.ia_src_blend_factor ||
 134           blend->cc6.blend_function != blend->cc5.ia_blend_function);
 135
 136       /* Per-surface blend enables, currently just follow global
 137        * state:
 138        */
 139       blend->ss0.color_blend = 1;
 140    }
 141
 142    blend->cc5.dither_enable = templ->dither;
 143
 144    if (BRW_DEBUG & DEBUG_STATS)
 145       blend->cc5.statistics_enable = 1;
 146
 147    /* Per-surface color mask -- just follow global state:
 148     */
 149    blend->ss0.writedisable_red   = (templ->rt[0].colormask & PIPE_MASK_R) ? 0 : 1;
 150    blend->ss0.writedisable_green = (templ->rt[0].colormask & PIPE_MASK_G) ? 0 : 1;
 151    blend->ss0.writedisable_blue  = (templ->rt[0].colormask & PIPE_MASK_B) ? 0 : 1;
 152    blend->ss0.writedisable_alpha = (templ->rt[0].colormask & PIPE_MASK_A) ? 0 : 1;
 153
 154    return (void *)blend;
 155 }
 156
 157 static void brw_bind_blend_state(struct pipe_context *pipe,
 158                                  void *cso)
 159 {
 160    struct brw_context *brw = brw_context(pipe);
 161    brw->curr.blend = (const struct brw_blend_state *)cso;
 162    brw->state.dirty.mesa |= PIPE_NEW_BLEND;
 163 }
 164
 165 static void brw_delete_blend_state(struct pipe_context *pipe,
 166                                   void *cso)
 167 {
 168    struct brw_context *brw = brw_context(pipe);
 169    assert((const void *)cso != (const void *)brw->curr.blend);
 170    FREE(cso);
 171 }
 172
 173
 174 static void brw_set_blend_color(struct pipe_context *pipe,
 175                                 const struct pipe_blend_color *blend_color)
 176 {
 177    struct brw_context *brw = brw_context(pipe);
 178    struct brw_blend_constant_color *bcc = &brw->curr.bcc;
 179
 180    bcc->blend_constant_color[0] = blend_color->color[0];
 181    bcc->blend_constant_color[1] = blend_color->color[1];
 182    bcc->blend_constant_color[2] = blend_color->color[2];
 183    bcc->blend_constant_color[3] = blend_color->color[3];
 184
 185    brw->state.dirty.mesa |= PIPE_NEW_BLEND_COLOR;
 186 }
 187
 188
 189 void brw_pipe_blend_init( struct brw_context *brw )
 190 {
 191    brw->base.set_blend_color = brw_set_blend_color;
 192    brw->base.create_blend_state = brw_create_blend_state;
 193    brw->base.bind_blend_state = brw_bind_blend_state;
 194    brw->base.delete_blend_state = brw_delete_blend_state;
 195
 196    {
 197       struct brw_blend_constant_color *bcc = &brw->curr.bcc;
 198
 199       memset(bcc, 0, sizeof(*bcc));
 200       bcc->header.opcode = CMD_BLEND_CONSTANT_COLOR;
 201       bcc->header.length = sizeof(*bcc)/4-2;
 202    }
 203
 204 }
 205
 206 void brw_pipe_blend_cleanup( struct brw_context *brw )
 207 {
 208 }