gtk2/gsk/resources/glsl/blit.vs.glsl

void main() {
  gl_Position = uMVP * vec4(aPosition, 0.0, 1.0);

  // Flip the sampling
  vUv = vec2(aUv.x, aUv.y);
}
gsk: Add 'blit' program For the root node we do not need to use blending, as it does not have any backdrop to blend into. We can use a simpler 'blit' program that only takes the content of the source and fills the texture quad with it. 2016-07-04 12:55:00 +00:00			`void main() {`
gsk: Rename uniforms and attributes in shaders Use appropriate names, and annotate the names with the types — 'u' for uniforms, 'a' for attributes. The common preambles for shaders are split from the bodies, so we need some way to distinguish the uniforms and the attributes just from their name. 2016-07-21 16:17:49 +00:00			`gl_Position = uMVP * vec4(aPosition, 0.0, 1.0);`
gsk: Add 'blit' program For the root node we do not need to use blending, as it does not have any backdrop to blend into. We can use a simpler 'blit' program that only takes the content of the source and fills the texture quad with it. 2016-07-04 12:55:00 +00:00
			`// Flip the sampling`
Use the projection to flip around the content Since we use an FBO to render the contents of the render node tree, the coordinate space is going to be flipped in GL. We can undo the flip by using an appropriate projection matrix, instead of changing the sampling coordinates in the shaders and updating all our coordinates at render time. 2016-08-02 15:58:47 +00:00			`vUv = vec2(aUv.x, aUv.y);`
gsk: Add 'blit' program For the root node we do not need to use blending, as it does not have any backdrop to blend into. We can use a simpler 'blit' program that only takes the content of the source and fills the texture quad with it. 2016-07-04 12:55:00 +00:00			`}`