Merge branch 'draw-instanced'

[mesa.git] / src / gallium / state_trackers / vega / shader.c

diff --git a/src/gallium/state_trackers/vega/shader.c b/src/gallium/state_trackers/vega/shader.c
index db410e3dadba6b3a365b1bf777819bd0868a803e..2a6bae8a6305071579864645e398bf41a0640b8d 100644 (file)
--- a/src/gallium/state_trackers/vega/shader.c
+++ b/src/gallium/state_trackers/vega/shader.c
@@ -34,11 +34,10 @@
 #include "renderer.h"
 
 #include "pipe/p_context.h"
-#include "pipe/p_screen.h"
 #include "pipe/p_state.h"
-#include "util/u_inlines.h"
 #include "util/u_memory.h"
 #include "util/u_math.h"
+#include "util/u_format.h"
 
 #define MAX_CONSTANTS 28
 
@@ -128,16 +127,36 @@ static VGint setup_constant_buffer(struct shader *shader)
    return param_bytes;
 }
 
+static VGboolean blend_use_shader(struct vg_context *ctx)
+{
+   VGboolean advanced_blending;
+
+   switch (ctx->state.vg.blend_mode) {
+   case VG_BLEND_SRC_OVER:
+      advanced_blending =
+         util_format_has_alpha(ctx->draw_buffer->strb->format);
+      break;
+   case VG_BLEND_DST_OVER:
+   case VG_BLEND_MULTIPLY:
+   case VG_BLEND_SCREEN:
+   case VG_BLEND_DARKEN:
+   case VG_BLEND_LIGHTEN:
+   case VG_BLEND_ADDITIVE:
+      advanced_blending = VG_TRUE;
+      break;
+   default:
+      advanced_blending = VG_FALSE;
+      break;
+   }
+
+   return advanced_blending;
+}
+
 static VGint blend_bind_samplers(struct vg_context *ctx,
                                  struct pipe_sampler_state **samplers,
                                  struct pipe_sampler_view **sampler_views)
 {
-   VGBlendMode bmode = ctx->state.vg.blend_mode;
-
-   if (bmode == VG_BLEND_MULTIPLY ||
-       bmode == VG_BLEND_SCREEN ||
-       bmode == VG_BLEND_DARKEN ||
-       bmode == VG_BLEND_LIGHTEN) {
+   if (blend_use_shader(ctx)) {
       samplers[2] = &ctx->blend_sampler;
       sampler_views[2] = vg_prepare_blend_surface(ctx);
 
@@ -255,26 +274,56 @@ static void setup_shader_program(struct shader *shader)
    if (shader->color_transform)
       shader_id |= VEGA_COLOR_TRANSFORM_SHADER;
 
-   if (shader->masking)
-      shader_id |= VEGA_MASK_SHADER;
+   if (blend_use_shader(ctx)) {
+      if (shader->drawing_image && shader->image_mode == VG_DRAW_IMAGE_STENCIL)
+         shader_id |= VEGA_ALPHA_PER_CHANNEL_SHADER;
+      else
+         shader_id |= VEGA_ALPHA_NORMAL_SHADER;
 
-   switch(blend_mode) {
-   case VG_BLEND_MULTIPLY:
-      shader_id |= VEGA_BLEND_MULTIPLY_SHADER;
-      break;
-   case VG_BLEND_SCREEN:
-      shader_id |= VEGA_BLEND_SCREEN_SHADER;
-      break;
-   case VG_BLEND_DARKEN:
-      shader_id |= VEGA_BLEND_DARKEN_SHADER;
-      break;
-   case VG_BLEND_LIGHTEN:
-      shader_id |= VEGA_BLEND_LIGHTEN_SHADER;
-      break;
-   default:
-      /* handled by pipe_blend_state */
-      break;
+      switch(blend_mode) {
+      case VG_BLEND_SRC:
+         shader_id |= VEGA_BLEND_SRC_SHADER;
+         break;
+      case VG_BLEND_SRC_OVER:
+         shader_id |= VEGA_BLEND_SRC_OVER_SHADER;
+         break;
+      case VG_BLEND_DST_OVER:
+         shader_id |= VEGA_BLEND_DST_OVER_SHADER;
+         break;
+      case VG_BLEND_SRC_IN:
+         shader_id |= VEGA_BLEND_SRC_IN_SHADER;
+         break;
+      case VG_BLEND_DST_IN:
+         shader_id |= VEGA_BLEND_DST_IN_SHADER;
+         break;
+      case VG_BLEND_MULTIPLY:
+         shader_id |= VEGA_BLEND_MULTIPLY_SHADER;
+         break;
+      case VG_BLEND_SCREEN:
+         shader_id |= VEGA_BLEND_SCREEN_SHADER;
+         break;
+      case VG_BLEND_DARKEN:
+         shader_id |= VEGA_BLEND_DARKEN_SHADER;
+         break;
+      case VG_BLEND_LIGHTEN:
+         shader_id |= VEGA_BLEND_LIGHTEN_SHADER;
+         break;
+      case VG_BLEND_ADDITIVE:
+         shader_id |= VEGA_BLEND_ADDITIVE_SHADER;
+         break;
+      default:
+         assert(0);
+         break;
+      }
    }
+   else {
+      /* update alpha of the source */
+      if (shader->drawing_image && shader->image_mode == VG_DRAW_IMAGE_STENCIL)
+         shader_id |= VEGA_ALPHA_PER_CHANNEL_SHADER;
+   }
+
+   if (shader->masking)
+      shader_id |= VEGA_MASK_SHADER;
 
    if (black_white)
       shader_id |= VEGA_BW_SHADER;