[GLES] speed up blending

(texture * color) costs us an extra operation on Mali when sent as varying.
Instead, since textures use the same color for the entire render, send it as
a uniform instead.

This does not apply to fonts, since the font and its shadow are rendered
together, and may not share a color (tested and looks bad).

This increases fps anywhere heavy blending is done.

2 files changed, 4 insertions, 4 deletions

diff --git a/system/shaders/guishader_frag_multi_blendcolor.glsl b/system/shaders/guishader_frag_multi_blendcolor.glsl
index 7dc909b3c8..8101970110 100644
--- a/system/shaders/guishader_frag_multi_blendcolor.glsl
+++ b/system/shaders/guishader_frag_multi_blendcolor.glsl
@@ -23,10 +23,10 @@ uniform   sampler2D m_samp0;
 uniform   sampler2D m_samp1;
 varying   vec4      m_cord0;
 varying   vec4      m_cord1;
-varying   lowp vec4 m_colour;
+uniform   lowp vec4 m_unicol;
 
 // SM_MULTI shader
 void main ()
 {
-  gl_FragColor.rgba = (texture2D(m_samp0, m_cord0.xy) * texture2D(m_samp1, m_cord1.xy)).rgba * m_colour;
+  gl_FragColor.rgba = (texture2D(m_samp0, m_cord0.xy) * texture2D(m_samp1, m_cord1.xy)).rgba * m_unicol;
 }
diff --git a/system/shaders/guishader_frag_texture.glsl b/system/shaders/guishader_frag_texture.glsl
index e71716e5bd..9939feb470 100644
--- a/system/shaders/guishader_frag_texture.glsl
+++ b/system/shaders/guishader_frag_texture.glsl
@@ -20,11 +20,11 @@
 
 precision mediump   float;
 uniform   sampler2D m_samp0;
+uniform   lowp vec4 m_unicol;
 varying   vec4      m_cord0;
-varying   lowp vec4 m_colour;
 
 // SM_TEXTURE shader
 void main ()
 {
-  gl_FragColor.rgba = vec4(texture2D(m_samp0, m_cord0.xy).rgba * m_colour);
+  gl_FragColor.rgba = vec4(texture2D(m_samp0, m_cord0.xy).rgba * m_unicol);
 }