From c18b8f1c29da10f72a104ad17286b9786d225bd5 Mon Sep 17 00:00:00 2001
From: Magnus <nergal@nergal.se>
Date: Tue, 11 Dec 2018 09:24:17 +0100
Subject: [PATCH] Added position as out variable from vertex shader.
Adding the position out form vertex shader makes us skip computation of position in the fragment shader based on gl_FragCoord.
---
pixelgl/glshader.go | 2 ++
1 file changed, 2 insertions(+)
diff --git a/pixelgl/glshader.go b/pixelgl/glshader.go
index 33e4f61..5023579 100644
--- a/pixelgl/glshader.go
+++ b/pixelgl/glshader.go
@@ -226,6 +226,7 @@ in float aIntensity;
out vec4 vColor;
out vec2 vTexCoords;
out float vIntensity;
+out vec2 vPosition;
uniform mat3 uTransform;
uniform vec4 uBounds;
@@ -235,6 +236,7 @@ void main() {
vec2 normPos = (transPos - uBounds.xy) / uBounds.zw * 2 - vec2(1, 1);
gl_Position = vec4(normPos, 0.0, 1.0);
vColor = aColor;
+ vPosition = aPosition;
vTexCoords = aTexCoords;
vIntensity = aIntensity;
}
--
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