25 lines
705 B
GLSL
25 lines
705 B
GLSL
attribute vec4 in_Position;
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attribute vec4 in_TexCoord0;
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//attribute float in_ColorIndex;
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//attribute float in_Alpha;
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uniform sampler2D colorTex;
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varying vec4 color;
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varying vec2 texCoord;
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void main(void)
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{
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// we pass color index as short int
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// reusing gl_MultiTexCoord0.z
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// we use 255 only because we have 256 color indices
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float t = in_TexCoord0.z / 255.0; // [0, 255] -> [0, 1]
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// we pass alpha values as as short int
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// reusing gl_MultiTexCoord0.w
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// we use 65535 for better precision
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float a = in_TexCoord0.w / 65535.0; // [0, 65535] -> [0, 1]
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color = vec4(texture2D(colorTex, vec2(t, 0.0)).rgb, a);
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texCoord = in_TexCoord0.st;
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set_vp(in_Position);
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}
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