385ee5c70b
This allows light sources to be specified in physical light units in addition to the regular energy multiplier. In order to avoid loss of precision at high values, brightness values are premultiplied by an exposure normalization value. In support of Physical Light Units this PR also renames CameraEffects to CameraAttributes.
285 lines
9.9 KiB
GLSL
285 lines
9.9 KiB
GLSL
#[compute]
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#version 450
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#VERSION_DEFINES
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layout(local_size_x = 8, local_size_y = 8, local_size_z = 1) in;
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#define FLAG_HORIZONTAL (1 << 0)
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#define FLAG_USE_BLUR_SECTION (1 << 1)
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#define FLAG_USE_ORTHOGONAL_PROJECTION (1 << 2)
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#define FLAG_DOF_NEAR_FIRST_TAP (1 << 3)
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#define FLAG_GLOW_FIRST_PASS (1 << 4)
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#define FLAG_FLIP_Y (1 << 5)
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#define FLAG_FORCE_LUMINANCE (1 << 6)
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#define FLAG_COPY_ALL_SOURCE (1 << 7)
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#define FLAG_HIGH_QUALITY_GLOW (1 << 8)
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#define FLAG_ALPHA_TO_ONE (1 << 9)
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layout(push_constant, std430) uniform Params {
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ivec4 section;
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ivec2 target;
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uint flags;
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uint pad;
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// Glow.
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float glow_strength;
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float glow_bloom;
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float glow_hdr_threshold;
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float glow_hdr_scale;
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float glow_exposure;
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float glow_white;
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float glow_luminance_cap;
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float glow_auto_exposure_scale;
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// DOF.
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float camera_z_far;
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float camera_z_near;
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uint pad2[2];
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vec4 set_color;
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}
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params;
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#ifdef MODE_CUBEMAP_ARRAY_TO_PANORAMA
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layout(set = 0, binding = 0) uniform samplerCubeArray source_color;
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#elif defined(MODE_CUBEMAP_TO_PANORAMA)
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layout(set = 0, binding = 0) uniform samplerCube source_color;
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#elif !defined(MODE_SET_COLOR)
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layout(set = 0, binding = 0) uniform sampler2D source_color;
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#endif
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#ifdef GLOW_USE_AUTO_EXPOSURE
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layout(set = 1, binding = 0) uniform sampler2D source_auto_exposure;
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#endif
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#if defined(MODE_LINEARIZE_DEPTH_COPY) || defined(MODE_SIMPLE_COPY_DEPTH)
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layout(r32f, set = 3, binding = 0) uniform restrict writeonly image2D dest_buffer;
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#elif defined(DST_IMAGE_8BIT)
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layout(rgba8, set = 3, binding = 0) uniform restrict writeonly image2D dest_buffer;
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#else
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layout(rgba32f, set = 3, binding = 0) uniform restrict writeonly image2D dest_buffer;
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#endif
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#ifdef MODE_GAUSSIAN_BLUR
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shared vec4 local_cache[256];
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shared vec4 temp_cache[128];
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#endif
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void main() {
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// Pixel being shaded
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ivec2 pos = ivec2(gl_GlobalInvocationID.xy);
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#ifndef MODE_GAUSSIAN_BLUR // Gaussian blur needs the extra threads
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if (any(greaterThanEqual(pos, params.section.zw))) { //too large, do nothing
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return;
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}
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#endif
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#ifdef MODE_MIPMAP
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ivec2 base_pos = (pos + params.section.xy) << 1;
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vec4 color = texelFetch(source_color, base_pos, 0);
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color += texelFetch(source_color, base_pos + ivec2(0, 1), 0);
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color += texelFetch(source_color, base_pos + ivec2(1, 0), 0);
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color += texelFetch(source_color, base_pos + ivec2(1, 1), 0);
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color /= 4.0;
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color = mix(color, vec4(100.0, 100.0, 100.0, 1.0), isinf(color));
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color = mix(color, vec4(100.0, 100.0, 100.0, 1.0), isnan(color));
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imageStore(dest_buffer, pos + params.target, color);
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#endif
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#ifdef MODE_GAUSSIAN_BLUR
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// First pass copy texture into 16x16 local memory for every 8x8 thread block
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vec2 quad_center_uv = clamp(vec2(gl_GlobalInvocationID.xy + gl_LocalInvocationID.xy - 3.5) / params.section.zw, vec2(0.5 / params.section.zw), vec2(1.0 - 1.5 / params.section.zw));
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uint dest_index = gl_LocalInvocationID.x * 2 + gl_LocalInvocationID.y * 2 * 16;
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#ifdef MODE_GLOW
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if (bool(params.flags & FLAG_HIGH_QUALITY_GLOW)) {
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vec2 quad_offset_uv = clamp((vec2(gl_GlobalInvocationID.xy + gl_LocalInvocationID.xy - 3.0)) / params.section.zw, vec2(0.5 / params.section.zw), vec2(1.0 - 1.5 / params.section.zw));
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local_cache[dest_index] = (textureLod(source_color, quad_center_uv, 0) + textureLod(source_color, quad_offset_uv, 0)) * 0.5;
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local_cache[dest_index + 1] = (textureLod(source_color, quad_center_uv + vec2(1.0 / params.section.z, 0.0), 0) + textureLod(source_color, quad_offset_uv + vec2(1.0 / params.section.z, 0.0), 0)) * 0.5;
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local_cache[dest_index + 16] = (textureLod(source_color, quad_center_uv + vec2(0.0, 1.0 / params.section.w), 0) + textureLod(source_color, quad_offset_uv + vec2(0.0, 1.0 / params.section.w), 0)) * 0.5;
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local_cache[dest_index + 16 + 1] = (textureLod(source_color, quad_center_uv + vec2(1.0 / params.section.zw), 0) + textureLod(source_color, quad_offset_uv + vec2(1.0 / params.section.zw), 0)) * 0.5;
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} else
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#endif
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{
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local_cache[dest_index] = textureLod(source_color, quad_center_uv, 0);
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local_cache[dest_index + 1] = textureLod(source_color, quad_center_uv + vec2(1.0 / params.section.z, 0.0), 0);
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local_cache[dest_index + 16] = textureLod(source_color, quad_center_uv + vec2(0.0, 1.0 / params.section.w), 0);
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local_cache[dest_index + 16 + 1] = textureLod(source_color, quad_center_uv + vec2(1.0 / params.section.zw), 0);
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}
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#ifdef MODE_GLOW
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if (bool(params.flags & FLAG_GLOW_FIRST_PASS)) {
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// Tonemap initial samples to reduce weight of fireflies: https://graphicrants.blogspot.com/2013/12/tone-mapping.html
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local_cache[dest_index] /= 1.0 + dot(local_cache[dest_index].rgb, vec3(0.299, 0.587, 0.114));
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local_cache[dest_index + 1] /= 1.0 + dot(local_cache[dest_index + 1].rgb, vec3(0.299, 0.587, 0.114));
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local_cache[dest_index + 16] /= 1.0 + dot(local_cache[dest_index + 16].rgb, vec3(0.299, 0.587, 0.114));
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local_cache[dest_index + 16 + 1] /= 1.0 + dot(local_cache[dest_index + 16 + 1].rgb, vec3(0.299, 0.587, 0.114));
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}
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const float kernel[4] = { 0.174938, 0.165569, 0.140367, 0.106595 };
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#else
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// Simpler blur uses SIGMA2 for the gaussian kernel for a stronger effect.
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const float kernel[4] = { 0.214607, 0.189879, 0.131514, 0.071303 };
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#endif
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memoryBarrierShared();
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barrier();
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// Horizontal pass. Needs to copy into 8x16 chunk of local memory so vertical pass has full resolution
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uint read_index = gl_LocalInvocationID.x + gl_LocalInvocationID.y * 32 + 4;
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vec4 color_top = vec4(0.0);
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color_top += local_cache[read_index] * kernel[0];
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color_top += local_cache[read_index + 1] * kernel[1];
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color_top += local_cache[read_index + 2] * kernel[2];
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color_top += local_cache[read_index + 3] * kernel[3];
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color_top += local_cache[read_index - 1] * kernel[1];
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color_top += local_cache[read_index - 2] * kernel[2];
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color_top += local_cache[read_index - 3] * kernel[3];
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vec4 color_bottom = vec4(0.0);
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color_bottom += local_cache[read_index + 16] * kernel[0];
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color_bottom += local_cache[read_index + 1 + 16] * kernel[1];
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color_bottom += local_cache[read_index + 2 + 16] * kernel[2];
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color_bottom += local_cache[read_index + 3 + 16] * kernel[3];
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color_bottom += local_cache[read_index - 1 + 16] * kernel[1];
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color_bottom += local_cache[read_index - 2 + 16] * kernel[2];
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color_bottom += local_cache[read_index - 3 + 16] * kernel[3];
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// rotate samples to take advantage of cache coherency
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uint write_index = gl_LocalInvocationID.y * 2 + gl_LocalInvocationID.x * 16;
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temp_cache[write_index] = color_top;
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temp_cache[write_index + 1] = color_bottom;
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memoryBarrierShared();
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barrier();
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// If destination outside of texture, can stop doing work now
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if (any(greaterThanEqual(pos, params.section.zw))) {
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return;
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}
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// Vertical pass
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uint index = gl_LocalInvocationID.y + gl_LocalInvocationID.x * 16 + 4;
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vec4 color = vec4(0.0);
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color += temp_cache[index] * kernel[0];
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color += temp_cache[index + 1] * kernel[1];
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color += temp_cache[index + 2] * kernel[2];
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color += temp_cache[index + 3] * kernel[3];
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color += temp_cache[index - 1] * kernel[1];
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color += temp_cache[index - 2] * kernel[2];
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color += temp_cache[index - 3] * kernel[3];
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#ifdef MODE_GLOW
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if (bool(params.flags & FLAG_GLOW_FIRST_PASS)) {
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// Undo tonemap to restore range: https://graphicrants.blogspot.com/2013/12/tone-mapping.html
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color /= 1.0 - dot(color.rgb, vec3(0.299, 0.587, 0.114));
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}
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color *= params.glow_strength;
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if (bool(params.flags & FLAG_GLOW_FIRST_PASS)) {
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#ifdef GLOW_USE_AUTO_EXPOSURE
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color /= texelFetch(source_auto_exposure, ivec2(0, 0), 0).r / params.glow_auto_exposure_scale;
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#endif
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color *= params.glow_exposure;
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float luminance = max(color.r, max(color.g, color.b));
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float feedback = max(smoothstep(params.glow_hdr_threshold, params.glow_hdr_threshold + params.glow_hdr_scale, luminance), params.glow_bloom);
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color = min(color * feedback, vec4(params.glow_luminance_cap));
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}
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#endif
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imageStore(dest_buffer, pos + params.target, color);
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#endif
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#ifdef MODE_SIMPLE_COPY
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vec4 color;
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if (bool(params.flags & FLAG_COPY_ALL_SOURCE)) {
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vec2 uv = vec2(pos) / vec2(params.section.zw);
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if (bool(params.flags & FLAG_FLIP_Y)) {
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uv.y = 1.0 - uv.y;
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}
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color = textureLod(source_color, uv, 0.0);
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} else {
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color = texelFetch(source_color, pos + params.section.xy, 0);
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if (bool(params.flags & FLAG_FLIP_Y)) {
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pos.y = params.section.w - pos.y - 1;
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}
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}
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if (bool(params.flags & FLAG_FORCE_LUMINANCE)) {
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color.rgb = vec3(max(max(color.r, color.g), color.b));
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}
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if (bool(params.flags & FLAG_ALPHA_TO_ONE)) {
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color.a = 1.0;
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}
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imageStore(dest_buffer, pos + params.target, color);
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#endif
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#ifdef MODE_SIMPLE_COPY_DEPTH
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vec4 color = texelFetch(source_color, pos + params.section.xy, 0);
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if (bool(params.flags & FLAG_FLIP_Y)) {
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pos.y = params.section.w - pos.y - 1;
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}
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imageStore(dest_buffer, pos + params.target, vec4(color.r));
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#endif
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#ifdef MODE_LINEARIZE_DEPTH_COPY
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float depth = texelFetch(source_color, pos + params.section.xy, 0).r;
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depth = depth * 2.0 - 1.0;
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depth = 2.0 * params.camera_z_near * params.camera_z_far / (params.camera_z_far + params.camera_z_near - depth * (params.camera_z_far - params.camera_z_near));
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vec4 color = vec4(depth / params.camera_z_far);
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if (bool(params.flags & FLAG_FLIP_Y)) {
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pos.y = params.section.w - pos.y - 1;
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}
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imageStore(dest_buffer, pos + params.target, color);
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#endif
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#if defined(MODE_CUBEMAP_TO_PANORAMA) || defined(MODE_CUBEMAP_ARRAY_TO_PANORAMA)
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const float PI = 3.14159265359;
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vec2 uv = vec2(pos) / vec2(params.section.zw);
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if (bool(params.flags & FLAG_FLIP_Y)) {
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uv.y = 1.0 - uv.y;
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}
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float phi = uv.x * 2.0 * PI;
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float theta = uv.y * PI;
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vec3 normal;
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normal.x = sin(phi) * sin(theta) * -1.0;
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normal.y = cos(theta);
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normal.z = cos(phi) * sin(theta) * -1.0;
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#ifdef MODE_CUBEMAP_TO_PANORAMA
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vec4 color = textureLod(source_color, normal, params.camera_z_far); //the biggest the lod the least the acne
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#else
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vec4 color = textureLod(source_color, vec4(normal, params.camera_z_far), 0.0); //the biggest the lod the least the acne
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#endif
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imageStore(dest_buffer, pos + params.target, color);
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#endif
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#ifdef MODE_SET_COLOR
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imageStore(dest_buffer, pos + params.target, params.set_color);
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#endif
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}
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