diff options
Diffstat (limited to 'source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl')
| -rw-r--r-- | source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl | 71 |
1 files changed, 35 insertions, 36 deletions
diff --git a/source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl b/source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl index 9f81206070b..ce6f3568cdf 100644 --- a/source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl +++ b/source/blender/draw/engines/eevee/shaders/effect_minmaxz_frag.glsl @@ -4,63 +4,62 @@ * Adapted from http://rastergrid.com/blog/2010/10/hierarchical-z-map-based-occlusion-culling/ **/ +#ifdef LAYERED +uniform sampler2DArray depthBuffer; +uniform int depthLayer; +#else uniform sampler2D depthBuffer; +#endif -out vec4 FragMinMax; - -vec2 sampleLowerMip(ivec2 texel) -{ -#ifdef INPUT_DEPTH - return texelFetch(depthBuffer, texel, 0).rr; +#ifdef LAYERED +#define sampleLowerMip(t) texelFetch(depthBuffer, ivec3(t, depthLayer), 0).r #else - return texelFetch(depthBuffer, texel, 0).rg; +#define sampleLowerMip(t) texelFetch(depthBuffer, t, 0).r #endif -} -void minmax(inout vec2 val[2]) -{ - val[0].x = min(val[0].x, val[1].x); - val[0].y = max(val[0].y, val[1].y); -} +#ifdef MIN_PASS +#define minmax(a, b) min(a, b) +#else /* MAX_PASS */ +#define minmax(a, b) max(a, b) +#endif void main() { - vec2 val[2]; ivec2 texelPos = ivec2(gl_FragCoord.xy); - ivec2 mipsize = textureSize(depthBuffer, 0); + ivec2 mipsize = textureSize(depthBuffer, 0).xy; + #ifndef COPY_DEPTH texelPos *= 2; #endif - val[0] = sampleLowerMip(texelPos); + float val = sampleLowerMip(texelPos); #ifndef COPY_DEPTH - val[1] = sampleLowerMip(texelPos + ivec2(1, 0)); - minmax(val); - val[1] = sampleLowerMip(texelPos + ivec2(1, 1)); - minmax(val); - val[1] = sampleLowerMip(texelPos + ivec2(0, 1)); - minmax(val); + float val2 = sampleLowerMip(texelPos + ivec2(1, 0)); + float val3 = sampleLowerMip(texelPos + ivec2(1, 1)); + float val4 = sampleLowerMip(texelPos + ivec2(0, 1)); + val = minmax(val, val2); + val = minmax(val, val3); + val = minmax(val, val4); /* if we are reducing an odd-width texture then fetch the edge texels */ - if (((mipsize.x & 1) != 0) && (int(gl_FragCoord.x) == mipsize.x-3)) { + if (((mipsize.x & 1) != 0) && (texelPos.x == mipsize.x - 3)) { /* if both edges are odd, fetch the top-left corner texel */ - if (((mipsize.y & 1) != 0) && (int(gl_FragCoord.y) == mipsize.y-3)) { - val[1] = sampleLowerMip(texelPos + ivec2(-1, -1)); - minmax(val); + if (((mipsize.y & 1) != 0) && (texelPos.y == mipsize.y - 3)) { + val = minmax(val, sampleLowerMip(texelPos + ivec2(2, 2))); } - val[1] = sampleLowerMip(texelPos + ivec2(0, -1)); - minmax(val); - val[1] = sampleLowerMip(texelPos + ivec2(1, -1)); - minmax(val); + float val2 = sampleLowerMip(texelPos + ivec2(2, 0)); + float val3 = sampleLowerMip(texelPos + ivec2(2, 1)); + val = minmax(val, val2); + val = minmax(val, val3); } /* if we are reducing an odd-height texture then fetch the edge texels */ - else if (((mipsize.y & 1) != 0) && (int(gl_FragCoord.y) == mipsize.y-3)) { - val[1] = sampleLowerMip(texelPos + ivec2(0, -1)); - minmax(val); - val[1] = sampleLowerMip(texelPos + ivec2(1, -1)); - minmax(val); + if (((mipsize.y & 1) != 0) && (texelPos.y == mipsize.y - 3)) { + float val2 = sampleLowerMip(texelPos + ivec2(0, 2)); + float val3 = sampleLowerMip(texelPos + ivec2(1, 2)); + val = minmax(val, val2); + val = minmax(val, val3); } #endif - FragMinMax = vec4(val[0], 0.0, 1.0); + gl_FragDepth = val; }
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