forked from joejulian/gio
Elias Naur
c20c1ab96f
Add fboTextureTransform shader function for cancelling the implied transformation from fragments output by the fragment shader and the (u, v) coordinates used to sample from it in a later pass. For OpenGL the transformation is the identity. Signed-off-by: Elias Naur <mail@eliasnaur.com>
33 lines
665 B
GLSL
33 lines
665 B
GLSL
#version 310 es
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// SPDX-License-Identifier: Unlicense OR MIT
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precision highp float;
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#include <common.inc>
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layout(binding = 0) uniform Block {
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float z;
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vec2 scale;
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vec2 offset;
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vec2 uvCoverScale;
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vec2 uvCoverOffset;
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vec2 uvScale;
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vec2 uvOffset;
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};
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layout(location = 0) in vec2 pos;
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layout(location = 0) out vec2 vCoverUV;
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layout(location = 1) in vec2 uv;
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layout(location = 1) out vec2 vUV;
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void main() {
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gl_Position = vec4(pos*scale + offset, z, 1);
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vUV = uv*uvScale + uvOffset;
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vec3[2] fboTrans = fboTextureTransform();
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vec3 uv3 = transform3x2(fboTrans, vec3(uv, 1.0));
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vCoverUV = (uv3*vec3(uvCoverScale, 1.0)+vec3(uvCoverOffset, 0.0)).xy;
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}
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