jogamp.graph.curve.opengl.shader.curverenderer01-pass2-vbaa_bforce_even.glsl Maven / Gradle / Ivy
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Java™ Binding for the OpenGL® API
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// Pass-2: AA on Texture
// Note: gcv_FboTexCoord is in center of sample pixels.
// float sample_count = gcu_FboTexSize.z;
vec2 psize = 1.0 / gcu_FboTexSize.xy; // pixel size
// Not only the poles (NW, SW, ..) but the whole edge!
const float sample_weight = 1.0 / ( sample_count * sample_count );
// const vec4 tex_weights = vec4(0.075, 0.06, 0.045, 0.025);
vec2 texCoord = gcv_FboTexCoord.st;
vec4 t;
// SampleCount 2 -> 4x
t = texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -0.5))*sample_weight; // NW
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, 0.5))*sample_weight; // SW
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, 0.5))*sample_weight; // SE
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -0.5))*sample_weight; // NE
#if SAMPLE_COUNT > 2
// SampleCount 4 -> +12x = 16p
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -1.5))*sample_weight; // NW -> SW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, 0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, 1.5))*sample_weight; // SW -> SE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, 1.5))*sample_weight; //
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, 1.5))*sample_weight; //
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, 1.5))*sample_weight; // SE -> NE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, 0.5))*sample_weight; //
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -0.5))*sample_weight; //
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -1.5))*sample_weight; // NE -> NW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -1.5))*sample_weight; //
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -1.5))*sample_weight; // NW - 1 (closed)
#if SAMPLE_COUNT > 4
// SampleCount 6 -> +20x = 36p
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -2.5))*sample_weight; // NW -> SW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, 0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, 1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, 2.5))*sample_weight; // SW -> SE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, 2.5))*sample_weight; // SE -> NE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, 1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, 0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -2.5))*sample_weight; // NE -> NW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -2.5))*sample_weight; // NW - 1 (closed)
#if SAMPLE_COUNT > 6
// SampleCount 8 -> +28x = 64p
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -3.5))*sample_weight; // NW -> SW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, -0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, 0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, 1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-3.5, 3.5))*sample_weight; // SW -> SE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, 3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, 3.5))*sample_weight; // SE -> NE Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, 2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, 1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, 0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -0.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -1.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -2.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 3.5, -3.5))*sample_weight; // NE -> NW Edge
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 2.5, -3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 1.5, -3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2( 0.5, -3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-0.5, -3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-1.5, -3.5))*sample_weight;
t += texture2D(gcu_FboTexUnit, texCoord + psize*vec2(-2.5, -3.5))*sample_weight; // NW - 1 (closed)
#endif
#endif
#endif
#if 0
if(t.w == 0.0){
discard; // discard freezes NV tegra2 compiler
}
#endif
mgl_FragColor = t;