gtk2/gsk/vulkan/resources/crossfade.frag

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GLSL
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#version 420 core
#include "clip.frag.glsl"
layout(location = 0) in vec2 inPos;
layout(location = 1) in vec2 inStartTexCoord;
layout(location = 2) in vec2 inEndTexCoord;
layout(location = 3) in float inProgress;
layout(set = 0, binding = 0) uniform sampler2D startTexture;
layout(set = 1, binding = 0) uniform sampler2D endTexture;
layout(location = 0) out vec4 color;
void main()
{
vec4 start = texture (startTexture, inStartTexCoord);
vec4 end = texture (endTexture, inEndTexCoord);
color = clip (inPos, mix (start, end, inProgress));
}