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Further, the shader code must use multisampling sampler types and texelFetch() instead
of texture().
\oldcode
#version 150
uniform sampler2D colorTexture;
in vec2 texCoord;
out vec4 fragColor;
void main()
{
fragColor = texture(colorTexture, texCoord);
}
\newcode
#version 150
uniform sampler2DMS colorTexture;
in vec2 texCoord;
out vec4 fragColor;
void main()
{
ivec2 tc = ivec2(floor(textureSize(colorTexture) * texCoord));
vec4 c = texelFetch(colorTexture, tc, 0) +
texelFetch(colorTexture, tc, 1) +
texelFetch(colorTexture, tc, 2) +
texelFetch(colorTexture, tc, 3);
fragColor = c / 4.0;
}
\endcode
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