src/gallium/drivers/i965/brw_pipe_blend.c

   1
   2
   3    /* _NEW_COLOR */
   4    if (key->logic_op != GL_COPY) {
   5       cc.cc2.logicop_enable = 1;
   6       cc.cc5.logicop_func = intel_translate_logic_op(key->logic_op);
   7    } else if (key->color_blend) {
   8       GLenum eqRGB = key->blend_eq_rgb;
   9       GLenum eqA = key->blend_eq_a;
  10       GLenum srcRGB = key->blend_src_rgb;
  11       GLenum dstRGB = key->blend_dst_rgb;
  12       GLenum srcA = key->blend_src_a;
  13       GLenum dstA = key->blend_dst_a;
  14
  15       if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
  16          srcRGB = dstRGB = GL_ONE;
  17       }
  18
  19       if (eqA == GL_MIN || eqA == GL_MAX) {
  20          srcA = dstA = GL_ONE;
  21       }
  22
  23       cc.cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB);
  24       cc.cc6.src_blend_factor = brw_translate_blend_factor(srcRGB);
  25       cc.cc6.blend_function = brw_translate_blend_equation(eqRGB);
  26
  27       cc.cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
  28       cc.cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA);
  29       cc.cc5.ia_blend_function = brw_translate_blend_equation(eqA);
  30
  31       cc.cc3.blend_enable = 1;
  32       cc.cc3.ia_blend_enable = (srcA != srcRGB ||
  33                                 dstA != dstRGB ||
  34                                 eqA != eqRGB);
  35    }
  36
  37    if (key->dither) {
  38       cc.cc5.dither_enable = 1;
  39       cc.cc6.y_dither_offset = 0;
  40       cc.cc6.x_dither_offset = 0;
  41    }
  42
  43    if (INTEL_DEBUG & DEBUG_STATS)
  44       cc.cc5.statistics_enable = 1;
  45 }
  46
  47
  48
  49 static void brw_set_blend_color(struct pipe_context *pipe,
  50                                 const float *blend_color)
  51 {
  52    struct brw_context *brw = brw_context(pipe);
  53    struct brw_blend_constant_color *bcc = &brw->curr.blend_color.bcc;
  54
  55    memset(bcc, 0, sizeof(*bcc));
  56    bcc->header.opcode = CMD_BLEND_CONSTANT_COLOR;
  57    bcc->header.length = sizeof(*bcc)/4-2;
  58    bcc->blend_constant_color[0] = blend_color[0];
  59    bcc->blend_constant_color[1] = blend_color[1];
  60    bcc->blend_constant_color[2] = blend_color[2];
  61    bcc->blend_constant_color[3] = blend_color[3];
  62
  63    brw->state.dirty.pipe |= PIPE_NEW_BLEND_COLOR;
  64 }