diff options
Diffstat (limited to 'src/renderergl2/glsl/depthblur_fp.glsl')
| -rw-r--r-- | src/renderergl2/glsl/depthblur_fp.glsl | 76 |
1 files changed, 50 insertions, 26 deletions
diff --git a/src/renderergl2/glsl/depthblur_fp.glsl b/src/renderergl2/glsl/depthblur_fp.glsl index 93895b4e..d71b3487 100644 --- a/src/renderergl2/glsl/depthblur_fp.glsl +++ b/src/renderergl2/glsl/depthblur_fp.glsl @@ -1,58 +1,82 @@ uniform sampler2D u_ScreenImageMap; uniform sampler2D u_ScreenDepthMap; -uniform vec4 u_ViewInfo; // zfar / znear, zfar +uniform vec4 u_ViewInfo; // zfar / znear, zfar, 1/width, 1/height varying vec2 var_ScreenTex; +//float gauss[8] = float[8](0.17, 0.17, 0.16, 0.14, 0.12, 0.1, 0.08, 0.06); //float gauss[5] = float[5](0.30, 0.23, 0.097, 0.024, 0.0033); float gauss[4] = float[4](0.40, 0.24, 0.054, 0.0044); //float gauss[3] = float[3](0.60, 0.19, 0.0066); -#define GAUSS_SIZE 4 +#define BLUR_SIZE 4 + +#if !defined(USE_DEPTH) +//#define USE_GAUSS +#endif float getLinearDepth(sampler2D depthMap, const vec2 tex, const float zFarDivZNear) { - float sampleZDivW = texture2D(depthMap, tex).r; - return 1.0 / mix(zFarDivZNear, 1.0, sampleZDivW); + float sampleZDivW = texture2D(depthMap, tex).r; + return 1.0 / mix(zFarDivZNear, 1.0, sampleZDivW); } -vec4 depthGaussian1D(sampler2D imageMap, sampler2D depthMap, vec2 tex, float zFarDivZNear, float zFar) +vec4 depthGaussian1D(sampler2D imageMap, sampler2D depthMap, vec2 tex, float zFarDivZNear, float zFar, vec2 scale) { - float scale = 1.0 / 256.0; + +#if defined(USE_DEPTH) + float depthCenter = getLinearDepth(depthMap, tex, zFarDivZNear); + vec2 slope = vec2(dFdx(depthCenter), dFdy(depthCenter)) / vec2(dFdx(tex.x), dFdy(tex.y)); + scale /= clamp(zFarDivZNear * depthCenter / 32.0, 1.0, 2.0); +#endif #if defined(USE_HORIZONTAL_BLUR) - vec2 direction = vec2(1.0, 0.0) * scale; + vec2 direction = vec2(scale.x * 2.0, 0.0); + vec2 nudge = vec2(0.0, scale.y * 0.5); #else // if defined(USE_VERTICAL_BLUR) - vec2 direction = vec2(0.0, 1.0) * scale; + vec2 direction = vec2(0.0, scale.y * 2.0); + vec2 nudge = vec2(-scale.x * 0.5, 0.0); #endif - - float depthCenter = zFar * getLinearDepth(depthMap, tex, zFarDivZNear); - vec2 centerSlope = vec2(dFdx(depthCenter), dFdy(depthCenter)) / vec2(dFdx(tex.x), dFdy(tex.y)); - + +#if defined(USE_GAUSS) vec4 result = texture2D(imageMap, tex) * gauss[0]; float total = gauss[0]; +#else + vec4 result = texture2D(imageMap, tex); + float total = 1.0; +#endif + float zLimit = 5.0 / zFar; int i, j; for (i = 0; i < 2; i++) { - for (j = 1; j < GAUSS_SIZE; j++) + for (j = 1; j < BLUR_SIZE; j++) { - vec2 offset = direction * j; - float depthSample = zFar * getLinearDepth(depthMap, tex + offset, zFarDivZNear); - float depthExpected = depthCenter + dot(centerSlope, offset); - if(abs(depthSample - depthExpected) < 5.0) - { - result += texture2D(imageMap, tex + offset) * gauss[j]; - total += gauss[j]; - } + vec2 offset = direction * (float(j) - 0.25) + nudge; +#if defined(USE_DEPTH) + float depthSample = getLinearDepth(depthMap, tex + offset, zFarDivZNear); + float depthExpected = depthCenter + dot(slope, offset); + float useSample = float(abs(depthSample - depthExpected) < zLimit); +#else + float useSample = 1.0; +#endif +#if defined(USE_GAUSS) + result += texture2D(imageMap, tex + offset) * (gauss[j] * useSample); + total += gauss[j] * useSample; +#else + result += texture2D(imageMap, tex + offset) * useSample; + total += useSample; +#endif + nudge = -nudge; } - + direction = -direction; - } - + nudge = -nudge; + } + return result / total; } void main() -{ - gl_FragColor = depthGaussian1D(u_ScreenImageMap, u_ScreenDepthMap, var_ScreenTex, u_ViewInfo.x, u_ViewInfo.y); +{ + gl_FragColor = depthGaussian1D(u_ScreenImageMap, u_ScreenDepthMap, var_ScreenTex, u_ViewInfo.x, u_ViewInfo.y, u_ViewInfo.zw); } |