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// Multi-texture fragment shader
// Brian Paul
// Composite second texture over first.
// We're assuming the 2nd texture has a meaningful alpha channel.
uniform sampler2D tex1;
uniform sampler2D tex2;
vec4 sample(sampler2D t, vec2 coord)
{
return texture2D(t, coord);
}
void main0()
{
vec4 t1 = texture2D(tex1, gl_TexCoord[0].xy);
//vec4 t1 = sample(tex1, gl_TexCoord[0].xy);
//vec4 t2 = texture2D(tex2, gl_TexCoord[1].xy);
vec4 t2 = sample(tex2, gl_TexCoord[0].xy);
gl_FragColor = mix(t1, t2, t2.w);
}
void main()
{
vec4 t1 = sample(tex1, gl_TexCoord[0].xy);
vec4 t2 = sample(tex2, gl_TexCoord[0].xy);
gl_FragColor = t1 + t2;
}
/*
0: MOV SAMPLER[0].x, SAMPLER[0];
1: MOV TEMP[1], INPUT[4];
2: TEX OUTPUT[0], TEMP[1], texture[0], 2D;
3: END
*/
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