auto-generate blending shader

effects/internal/blending.frag

@@ -1,40 +0,0 @@
-#version 110
-
-/*
-	This main stump is combined with another shader loaded externally to produce a blending mode.
-
-	For a custom blend mode, the function blend() MUST be available, and use the following syntax:
-
-	blend(vec3 base_color, vec3 blend_color, float opacity)
-
-*/
-
-void main(void) {
-	vec4 bg_color = texture2D(background, vTexCoord);
-	vec4 fg_color = texture2D(foreground, vTexCoord);
-
-	// blend textures together
-	vec3 composite = blend(bg_color.rgb, fg_color.rgb);	
-
-	if (blendmode == BLEND_MODE_OVERLAY
-			|| blendmode == BLEND_MODE_LIGHTEN 
-			|| blendmode == BLEND_MODE_SCREEN 
-			|| blendmode == BLEND_MODE_COLORDODGE 
-			|| blendmode == BLEND_MODE_LINEARDODGE 
-			|| blendmode == BLEND_MODE_ADD 
-			|| blendmode == BLEND_MODE_SOFTLIGHT 
-			|| blendmode == BLEND_MODE_NEGATION 
-			|| blendmode == BLEND_MODE_AVERAGE 
-			|| blendmode == BLEND_MODE_REFLECT 
-			|| blendmode == BLEND_MODE_EXCLUSION 
-			|| blendmode == BLEND_MODE_DIFFERENCE) {
-		composite *= fg_color.a;
-	}
-
-	vec4 full_composite = vec4(composite + bg_color.rgb*(1.0-fg_color.a), bg_color.a + fg_color.a);
-
-	full_composite = mix(bg_color, full_composite, opacity);
-
-	// output to color
-	gl_FragColor = full_composite;
-}

effects/internal/internalshaders.qrc

@@ -1,6 +1,5 @@
 <RCC>
     <qresource prefix="/internalshaders">
-        <file>blending.frag</file>
         <file>common.vert</file>
         <file>cornerpin.frag</file>
         <file>cornerpin.vert</file>

effects/multiply.blend

@@ -6,4 +6,5 @@ vec3 blendMultiply(vec3 base, vec3 blend, float opacity) {
 	return (blendMultiply(base, blend) * opacity + base * (1.0 - opacity));
 }
 
-#pragma glslify: export(blendMultiply)
+#pragma glslify: export(blendMultiply)
+#olive name Multiply