[gtk] gl renderer: Remove blend shader

[Timm Bäder <baedert src gnome org>]

commit 2b95a5daee53c0899b26c583c609ec0ba3fdaa01
Author: Timm Bäder <mail baedert org>
Date:   Sun Dec 2 16:04:40 2018 +0100

    gl renderer: Remove blend shader
    
    It's unused.

 gsk/gl/gskglrenderer.c           |  2 --
 gsk/gl/gskglrenderopsprivate.h   |  2 +-
 gsk/meson.build                  |  2 --
 gsk/resources/glsl/blend.fs.glsl | 61 ----------------------------------------
 gsk/resources/glsl/blend.vs.glsl |  5 ----
 5 files changed, 1 insertion(+), 71 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index ac36b88117..aea42b8368 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -282,7 +282,6 @@ struct _GskGLRenderer
   union {
     Program programs[GL_N_PROGRAMS];
     struct {
-      Program blend_program;
       Program blit_program;
       Program color_program;
       Program coloring_program;
@@ -1965,7 +1964,6 @@ gsk_gl_renderer_create_programs (GskGLRenderer  *self,
     const char *vs;
     const char *fs;
   } program_definitions[] = {
-    { "blend",           "blend.vs.glsl", "blend.fs.glsl" },
     { "blit",            "blit.vs.glsl",  "blit.fs.glsl" },
     { "color",           "blit.vs.glsl",  "color.fs.glsl" },
     { "coloring",        "blit.vs.glsl",  "coloring.fs.glsl" },
diff --git a/gsk/gl/gskglrenderopsprivate.h b/gsk/gl/gskglrenderopsprivate.h
index 88303f039e..c4bf2b29b9 100644
--- a/gsk/gl/gskglrenderopsprivate.h
+++ b/gsk/gl/gskglrenderopsprivate.h
@@ -10,7 +10,7 @@
 #include "gskglrendererprivate.h"
 
 #define GL_N_VERTICES 6
-#define GL_N_PROGRAMS 12
+#define GL_N_PROGRAMS 11
 
 
 
diff --git a/gsk/meson.build b/gsk/meson.build
index 9b3db2beac..46c578454b 100644
--- a/gsk/meson.build
+++ b/gsk/meson.build
@@ -1,6 +1,4 @@
 gsk_private_gl_shaders = [
-  'resources/glsl/blend.fs.glsl',
-  'resources/glsl/blend.vs.glsl',
   'resources/glsl/blit.fs.glsl',
   'resources/glsl/blit.vs.glsl',
   'resources/glsl/color.fs.glsl',