source:
data/trunk/programs/hdr_downscale3x3.glsl
@
12397
| Last change on this file since 12397 was 7708, checked in by dafrick, 14 years ago | |
|---|---|
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| File size: 846 bytes | |
| Rev | Line | |
|---|---|---|
| [5312] | 1 | uniform sampler2D inRTT; |
| 2 | uniform vec2 texelSize; | |
| 3 | ||
| 4 | varying vec2 uv; | |
| 5 | ||
| 6 | void main(void) | |
| 7 | { | |
| 8 | vec4 accum = vec4(0.0, 0.0, 0.0, 0.0); | |
| 9 | ||
| 10 | // Get colour from source | |
| 11 | accum += texture2D(inRTT, uv + texelSize * vec2(-1.0, -1.0)); | |
| 12 | accum += texture2D(inRTT, uv + texelSize * vec2( 0.0, -1.0)); | |
| 13 | accum += texture2D(inRTT, uv + texelSize * vec2( 1.0, -1.0)); | |
| 14 | accum += texture2D(inRTT, uv + texelSize * vec2(-1.0, 0.0)); | |
| 15 | accum += texture2D(inRTT, uv + texelSize * vec2( 0.0, 0.0)); | |
| 16 | accum += texture2D(inRTT, uv + texelSize * vec2( 1.0, 0.0)); | |
| 17 | accum += texture2D(inRTT, uv + texelSize * vec2(-1.0, 1.0)); | |
| 18 | accum += texture2D(inRTT, uv + texelSize * vec2( 0.0, 1.0)); | |
| 19 | accum += texture2D(inRTT, uv + texelSize * vec2( 1.0, 1.0)); | |
| 20 | ||
| 21 | // take average of 9 samples | |
| 22 | accum *= 0.1111111111111111; | |
| 23 | ||
| 24 | gl_FragColor = accum; | |
| 25 | ||
| 26 | } |
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