diff options
Diffstat (limited to 'drivers/gles2/shaders/effect_blur.glsl')
| -rw-r--r-- | drivers/gles2/shaders/effect_blur.glsl | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/drivers/gles2/shaders/effect_blur.glsl b/drivers/gles2/shaders/effect_blur.glsl new file mode 100644 index 0000000000..b5f98a1244 --- /dev/null +++ b/drivers/gles2/shaders/effect_blur.glsl @@ -0,0 +1,301 @@ +[vertex] + + +layout(location=0) in highp vec4 vertex_attrib; +layout(location=4) in vec2 uv_in; + +out vec2 uv_interp; + +#ifdef USE_BLUR_SECTION + +uniform vec4 blur_section; + +#endif + +void main() { + + uv_interp = uv_in; + gl_Position = vertex_attrib; +#ifdef USE_BLUR_SECTION + + uv_interp = blur_section.xy + uv_interp * blur_section.zw; + gl_Position.xy = (blur_section.xy + (gl_Position.xy * 0.5 + 0.5) * blur_section.zw) * 2.0 - 1.0; +#endif +} + +[fragment] + +#if !defined(GLES_OVER_GL) +precision mediump float; +#endif + +in vec2 uv_interp; +uniform sampler2D source_color; //texunit:0 + +#ifdef SSAO_MERGE +uniform sampler2D source_ssao; //texunit:1 +#endif + +uniform float lod; +uniform vec2 pixel_size; + + +layout(location = 0) out vec4 frag_color; + +#ifdef SSAO_MERGE + +uniform vec4 ssao_color; + +#endif + +#if defined (GLOW_GAUSSIAN_HORIZONTAL) || defined(GLOW_GAUSSIAN_VERTICAL) + +uniform float glow_strength; + +#endif + +#if defined(DOF_FAR_BLUR) || defined (DOF_NEAR_BLUR) + +#ifdef DOF_QUALITY_LOW +const int dof_kernel_size=5; +const int dof_kernel_from=2; +const float dof_kernel[5] = float[] (0.153388,0.221461,0.250301,0.221461,0.153388); +#endif + +#ifdef DOF_QUALITY_MEDIUM +const int dof_kernel_size=11; +const int dof_kernel_from=5; +const float dof_kernel[11] = float[] (0.055037,0.072806,0.090506,0.105726,0.116061,0.119726,0.116061,0.105726,0.090506,0.072806,0.055037); + +#endif + +#ifdef DOF_QUALITY_HIGH +const int dof_kernel_size=21; +const int dof_kernel_from=10; +const float dof_kernel[21] = float[] (0.028174,0.032676,0.037311,0.041944,0.046421,0.050582,0.054261,0.057307,0.059587,0.060998,0.061476,0.060998,0.059587,0.057307,0.054261,0.050582,0.046421,0.041944,0.037311,0.032676,0.028174); +#endif + +uniform sampler2D dof_source_depth; //texunit:1 +uniform float dof_begin; +uniform float dof_end; +uniform vec2 dof_dir; +uniform float dof_radius; + +#ifdef DOF_NEAR_BLUR_MERGE + +uniform sampler2D source_dof_original; //texunit:2 +#endif + +#endif + + +#ifdef GLOW_FIRST_PASS + +uniform float exposure; +uniform float white; + +#ifdef GLOW_USE_AUTO_EXPOSURE + +uniform highp sampler2D source_auto_exposure; //texunit:1 +uniform highp float auto_exposure_grey; + +#endif + +uniform float glow_bloom; +uniform float glow_hdr_threshold; +uniform float glow_hdr_scale; + +#endif + +uniform float camera_z_far; +uniform float camera_z_near; + +void main() { + + + +#ifdef GAUSSIAN_HORIZONTAL + vec2 pix_size = pixel_size; + pix_size*=0.5; //reading from larger buffer, so use more samples + vec4 color =textureLod( source_color, uv_interp+vec2( 0.0, 0.0)*pix_size,lod )*0.214607; + color+=textureLod( source_color, uv_interp+vec2( 1.0, 0.0)*pix_size,lod )*0.189879; + color+=textureLod( source_color, uv_interp+vec2( 2.0, 0.0)*pix_size,lod )*0.157305; + color+=textureLod( source_color, uv_interp+vec2( 3.0, 0.0)*pix_size,lod )*0.071303; + color+=textureLod( source_color, uv_interp+vec2(-1.0, 0.0)*pix_size,lod )*0.189879; + color+=textureLod( source_color, uv_interp+vec2(-2.0, 0.0)*pix_size,lod )*0.157305; + color+=textureLod( source_color, uv_interp+vec2(-3.0, 0.0)*pix_size,lod )*0.071303; + frag_color = color; +#endif + +#ifdef GAUSSIAN_VERTICAL + vec4 color =textureLod( source_color, uv_interp+vec2( 0.0, 0.0)*pixel_size,lod )*0.38774; + color+=textureLod( source_color, uv_interp+vec2( 0.0, 1.0)*pixel_size,lod )*0.24477; + color+=textureLod( source_color, uv_interp+vec2( 0.0, 2.0)*pixel_size,lod )*0.06136; + color+=textureLod( source_color, uv_interp+vec2( 0.0,-1.0)*pixel_size,lod )*0.24477; + color+=textureLod( source_color, uv_interp+vec2( 0.0,-2.0)*pixel_size,lod )*0.06136; + frag_color = color; +#endif + +//glow uses larger sigma for a more rounded blur effect + +#ifdef GLOW_GAUSSIAN_HORIZONTAL + vec2 pix_size = pixel_size; + pix_size*=0.5; //reading from larger buffer, so use more samples + vec4 color =textureLod( source_color, uv_interp+vec2( 0.0, 0.0)*pix_size,lod )*0.174938; + color+=textureLod( source_color, uv_interp+vec2( 1.0, 0.0)*pix_size,lod )*0.165569; + color+=textureLod( source_color, uv_interp+vec2( 2.0, 0.0)*pix_size,lod )*0.140367; + color+=textureLod( source_color, uv_interp+vec2( 3.0, 0.0)*pix_size,lod )*0.106595; + color+=textureLod( source_color, uv_interp+vec2(-1.0, 0.0)*pix_size,lod )*0.165569; + color+=textureLod( source_color, uv_interp+vec2(-2.0, 0.0)*pix_size,lod )*0.140367; + color+=textureLod( source_color, uv_interp+vec2(-3.0, 0.0)*pix_size,lod )*0.106595; + color*=glow_strength; + frag_color = color; +#endif + +#ifdef GLOW_GAUSSIAN_VERTICAL + vec4 color =textureLod( source_color, uv_interp+vec2(0.0, 0.0)*pixel_size,lod )*0.288713; + color+=textureLod( source_color, uv_interp+vec2(0.0, 1.0)*pixel_size,lod )*0.233062; + color+=textureLod( source_color, uv_interp+vec2(0.0, 2.0)*pixel_size,lod )*0.122581; + color+=textureLod( source_color, uv_interp+vec2(0.0,-1.0)*pixel_size,lod )*0.233062; + color+=textureLod( source_color, uv_interp+vec2(0.0,-2.0)*pixel_size,lod )*0.122581; + color*=glow_strength; + frag_color = color; +#endif + +#ifdef DOF_FAR_BLUR + + vec4 color_accum = vec4(0.0); + + float depth = textureLod( dof_source_depth, uv_interp, 0.0).r; + depth = depth * 2.0 - 1.0; +#ifdef USE_ORTHOGONAL_PROJECTION + depth = ((depth + (camera_z_far + camera_z_near)/(camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near))/2.0; +#else + depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - depth * (camera_z_far - camera_z_near)); +#endif + + float amount = smoothstep(dof_begin,dof_end,depth); + float k_accum=0.0; + + for(int i=0;i<dof_kernel_size;i++) { + + int int_ofs = i-dof_kernel_from; + vec2 tap_uv = uv_interp + dof_dir * float(int_ofs) * amount * dof_radius; + + float tap_k = dof_kernel[i]; + + float tap_depth = texture( dof_source_depth, tap_uv, 0.0).r; + tap_depth = tap_depth * 2.0 - 1.0; +#ifdef USE_ORTHOGONAL_PROJECTION + tap_depth = ((tap_depth + (camera_z_far + camera_z_near)/(camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near))/2.0; +#else + tap_depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - tap_depth * (camera_z_far - camera_z_near)); +#endif + float tap_amount = mix(smoothstep(dof_begin,dof_end,tap_depth),1.0,int_ofs==0); + tap_amount*=tap_amount*tap_amount; //prevent undesired glow effect + + vec4 tap_color = textureLod( source_color, tap_uv, 0.0) * tap_k; + + k_accum+=tap_k*tap_amount; + color_accum+=tap_color*tap_amount; + + + } + + if (k_accum>0.0) { + color_accum/=k_accum; + } + + frag_color = color_accum;///k_accum; + +#endif + +#ifdef DOF_NEAR_BLUR + + vec4 color_accum = vec4(0.0); + + float max_accum=0; + + for(int i=0;i<dof_kernel_size;i++) { + + int int_ofs = i-dof_kernel_from; + vec2 tap_uv = uv_interp + dof_dir * float(int_ofs) * dof_radius; + float ofs_influence = max(0.0,1.0-float(abs(int_ofs))/float(dof_kernel_from)); + + float tap_k = dof_kernel[i]; + + vec4 tap_color = textureLod( source_color, tap_uv, 0.0); + + float tap_depth = texture( dof_source_depth, tap_uv, 0.0).r; + tap_depth = tap_depth * 2.0 - 1.0; +#ifdef USE_ORTHOGONAL_PROJECTION + tap_depth = ((tap_depth + (camera_z_far + camera_z_near)/(camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near))/2.0; +#else + tap_depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - tap_depth * (camera_z_far - camera_z_near)); +#endif + float tap_amount = 1.0-smoothstep(dof_end,dof_begin,tap_depth); + tap_amount*=tap_amount*tap_amount; //prevent undesired glow effect + +#ifdef DOF_NEAR_FIRST_TAP + + tap_color.a= 1.0-smoothstep(dof_end,dof_begin,tap_depth); + +#endif + + max_accum=max(max_accum,tap_amount*ofs_influence); + + color_accum+=tap_color*tap_k; + + } + + color_accum.a=max(color_accum.a,sqrt(max_accum)); + + +#ifdef DOF_NEAR_BLUR_MERGE + + vec4 original = textureLod( source_dof_original, uv_interp, 0.0); + color_accum = mix(original,color_accum,color_accum.a); + +#endif + +#ifndef DOF_NEAR_FIRST_TAP + //color_accum=vec4(vec3(color_accum.a),1.0); +#endif + frag_color = color_accum; + +#endif + + + +#ifdef GLOW_FIRST_PASS + +#ifdef GLOW_USE_AUTO_EXPOSURE + + frag_color/=texelFetch(source_auto_exposure,ivec2(0,0),0).r/auto_exposure_grey; +#endif + frag_color*=exposure; + + float luminance = max(frag_color.r,max(frag_color.g,frag_color.b)); + float feedback = max( smoothstep(glow_hdr_threshold,glow_hdr_threshold+glow_hdr_scale,luminance), glow_bloom ); + + frag_color *= feedback; + +#endif + + +#ifdef SIMPLE_COPY + vec4 color =textureLod( source_color, uv_interp,0.0); + frag_color = color; +#endif + +#ifdef SSAO_MERGE + + vec4 color =textureLod( source_color, uv_interp,0.0); + float ssao =textureLod( source_ssao, uv_interp,0.0).r; + + frag_color = vec4( mix(color.rgb,color.rgb*mix(ssao_color.rgb,vec3(1.0),ssao),color.a), 1.0 ); + +#endif + + +} |