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793c2b5611
postprocess.vert.glsl had `TexCoord.y = 1.0 - TexCoord.y` which inverted the vertical sampling of the scene texture. Vulkan textures use v=0 at the top, matching framebuffer row 0, so no flip is needed. The camera already flips the projection matrix (mat[1][1] *= -1) so the scene is rendered correctly oriented; the extra inversion in the postprocess pass flipped FXAA output upside down. Fixes: FXAA shows camera upside down Also fixes: FSR1 upscale and FSR3 sharpen passes (same vertex shader)
12 lines
460 B
GLSL
12 lines
460 B
GLSL
#version 450
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layout(location = 0) out vec2 TexCoord;
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void main() {
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// Fullscreen triangle trick: 3 vertices, no vertex buffer
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TexCoord = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
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gl_Position = vec4(TexCoord * 2.0 - 1.0, 0.0, 1.0);
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// No Y-flip: scene textures use Vulkan convention (v=0 at top),
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// and NDC y=-1 already maps to framebuffer top, so the triangle
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// naturally samples the correct row without any inversion.
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}
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