48 lines
803 B
GLSL
48 lines
803 B
GLSL
#version 150
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#define float2 vec2
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#define float3 vec3
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#define float4 vec4
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layout(std140) uniform UBO
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{
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vec4 SourceSize;
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vec4 OriginalSize;
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vec4 OutputSize;
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uint FrameCount;
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mat4 MVP;
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}global;
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layout(location = 0) in vec4 Position;
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layout(location = 1) in vec2 TexCoord;
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layout(location = 0) out vec2 vTexCoord;
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float min(vec2 x)
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{
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if(x . x > x . y)
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return x . y;
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else
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return x . x;
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}
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void main()
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{
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gl_Position = global . MVP * Position;
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vec2 box_scale = floor(global . OutputSize . xy / global . SourceSize . xy);
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box_scale = vec2(min(box_scale), min(box_scale));
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vec2 scale =(global . OutputSize . xy / global . SourceSize . xy)/ box_scale;
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vec2 middle = vec2(0.5);
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vec2 diff = TexCoord - middle;
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vTexCoord = middle + diff * scale;
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}
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