gallium: prepare for per-rendertarget blend enables, writemasks, blend funcs

GL 3.0 (EXT_draw_buffers2) and other APIs allow independent blend enables and
write masks per render target, ARB_draw_buffers_blend (and other APIs) also
allow independent blend functions. Things like dithering, logic ops however
are not extended to be per rendertarget, that might be conceptually possible
however it doesn't look like any API wants to expose this.

2 files changed, 23 insertions, 23 deletions

diff --git a/src/mesa/state_tracker/st_atom_blend.c b/src/mesa/state_tracker/st_atom_blend.c
index 43e62c29f3e..75c14183350 100644
--- a/src/mesa/state_tracker/st_atom_blend.c
+++ b/src/mesa/state_tracker/st_atom_blend.c
@@ -169,30 +169,30 @@ update_blend( struct st_context *st )
    }
    else if (st->ctx->Color.BlendEnabled) {
       /* blending enabled */
-      blend->blend_enable = 1;
+      blend->rt[0].blend_enable = 1;
 
-      blend->rgb_func = translate_blend(st->ctx->Color.BlendEquationRGB);
+      blend->rt[0].rgb_func = translate_blend(st->ctx->Color.BlendEquationRGB);
       if (st->ctx->Color.BlendEquationRGB == GL_MIN ||
           st->ctx->Color.BlendEquationRGB == GL_MAX) {
          /* Min/max are special */
-         blend->rgb_src_factor = PIPE_BLENDFACTOR_ONE;
-         blend->rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
+         blend->rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+         blend->rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
       }
       else {
-         blend->rgb_src_factor = translate_blend(st->ctx->Color.BlendSrcRGB);
-         blend->rgb_dst_factor = translate_blend(st->ctx->Color.BlendDstRGB);
+         blend->rt[0].rgb_src_factor = translate_blend(st->ctx->Color.BlendSrcRGB);
+         blend->rt[0].rgb_dst_factor = translate_blend(st->ctx->Color.BlendDstRGB);
       }
 
-      blend->alpha_func = translate_blend(st->ctx->Color.BlendEquationA);
+      blend->rt[0].alpha_func = translate_blend(st->ctx->Color.BlendEquationA);
       if (st->ctx->Color.BlendEquationA == GL_MIN ||
           st->ctx->Color.BlendEquationA == GL_MAX) {
          /* Min/max are special */
-         blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
-         blend->alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
+         blend->rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+         blend->rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
       }
       else {
-         blend->alpha_src_factor = translate_blend(st->ctx->Color.BlendSrcA);
-         blend->alpha_dst_factor = translate_blend(st->ctx->Color.BlendDstA);
+         blend->rt[0].alpha_src_factor = translate_blend(st->ctx->Color.BlendSrcA);
+         blend->rt[0].alpha_dst_factor = translate_blend(st->ctx->Color.BlendDstA);
       }
    }
    else {
@@ -201,13 +201,13 @@ update_blend( struct st_context *st )
 
    /* Colormask - maybe reverse these bits? */
    if (st->ctx->Color.ColorMask[0][0])
-      blend->colormask |= PIPE_MASK_R;
+      blend->rt[0].colormask |= PIPE_MASK_R;
    if (st->ctx->Color.ColorMask[0][1])
-      blend->colormask |= PIPE_MASK_G;
+      blend->rt[0].colormask |= PIPE_MASK_G;
    if (st->ctx->Color.ColorMask[0][2])
-      blend->colormask |= PIPE_MASK_B;
+      blend->rt[0].colormask |= PIPE_MASK_B;
    if (st->ctx->Color.ColorMask[0][3])
-      blend->colormask |= PIPE_MASK_A;
+      blend->rt[0].colormask |= PIPE_MASK_A;
 
    if (st->ctx->Color.DitherFlag)
       blend->dither = 1;
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 192d765f453..2c1be41ad83 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -227,19 +227,19 @@ clear_with_quad(GLcontext *ctx,
    {
       struct pipe_blend_state blend;
       memset(&blend, 0, sizeof(blend));
-      blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
-      blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
-      blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
-      blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+      blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+      blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
+      blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
       if (color) {
          if (ctx->Color.ColorMask[0][0])
-            blend.colormask |= PIPE_MASK_R;
+            blend.rt[0].colormask |= PIPE_MASK_R;
          if (ctx->Color.ColorMask[0][1])
-            blend.colormask |= PIPE_MASK_G;
+            blend.rt[0].colormask |= PIPE_MASK_G;
          if (ctx->Color.ColorMask[0][2])
-            blend.colormask |= PIPE_MASK_B;
+            blend.rt[0].colormask |= PIPE_MASK_B;
          if (ctx->Color.ColorMask[0][3])
-            blend.colormask |= PIPE_MASK_A;
+            blend.rt[0].colormask |= PIPE_MASK_A;
          if (st->ctx->Color.DitherFlag)
             blend.dither = 1;
       }