GPU Pro 5

5. Tiled Deferred Blending 307

attribute vec2

Position ,

TextureCoordinates [ LAYER_COUNT ];

varying mediump vec2

vTextureCoordinates [ LAYER_COUNT ];

void main ()

{

gl_Position = vec4 ( Position . xy , 0.0 , 1.0 ) ;

for ( int i =0; i < LAYER_COUNT ; i++ )

{

vTextureCoordinates [ i ]=TextureCoordinates [ i ];

}

}

Listing 5.3. Single draw call vertex shader.

superfluous layers into account; this solution requires packing an extra attribute

containing the number of layers aggregated by the current primitive.

We did not need to implement this, but it should be possible to address the

texture limitation mentioned before (one texture or same textures in same order ...