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Optimizing glow behaviour

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This commit is contained in:
Raffaele Picca 2023-09-26 09:17:11 +02:00
parent 43b9e89a07
commit de42258154
1 changed files with 19 additions and 6 deletions
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25
servers/rendering/renderer_rd/shaders/effects/copy.glsl
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@ -103,12 +103,13 @@ void main() {
#ifdef MODE_GLOW
if (bool(params.flags & FLAG_GLOW_FIRST_PASS)) {
// Tonemap initial samples to reduce weight of fireflies: https://graphicrants.blogspot.com/2013/12/tone-mapping.html
local_cache[dest_index] /= 1.0 + dot(local_cache[dest_index].rgb, vec3(0.299, 0.587, 0.114));
local_cache[dest_index + 1] /= 1.0 + dot(local_cache[dest_index + 1].rgb, vec3(0.299, 0.587, 0.114));
local_cache[dest_index + 16] /= 1.0 + dot(local_cache[dest_index + 16].rgb, vec3(0.299, 0.587, 0.114));
local_cache[dest_index + 16 + 1] /= 1.0 + dot(local_cache[dest_index + 16 + 1].rgb, vec3(0.299, 0.587, 0.114));
vec3 tonemap_col = vec3(0.299, 0.587, 0.114) / max(params.glow_luminance_cap, 6.0);
local_cache[dest_index] /= 1.0 + dot(local_cache[dest_index].rgb, tonemap_col);
local_cache[dest_index + 1] /= 1.0 + dot(local_cache[dest_index + 1].rgb, tonemap_col);
local_cache[dest_index + 16] /= 1.0 + dot(local_cache[dest_index + 16].rgb, tonemap_col);
local_cache[dest_index + 16 + 1] /= 1.0 + dot(local_cache[dest_index + 16 + 1].rgb, tonemap_col);
}
const float kernel[4] = { 0.174938, 0.165569, 0.140367, 0.106595 };
const float kernel[5] = { 0.2024, 0.1790, 0.1240, 0.0672, 0.0285 };
#else
// Simpler blur uses SIGMA2 for the gaussian kernel for a stronger effect.
const float kernel[4] = { 0.214607, 0.189879, 0.131514, 0.071303 };
@ -126,6 +127,10 @@ void main() {
color_top += local_cache[read_index - 1] * kernel[1];
color_top += local_cache[read_index - 2] * kernel[2];
color_top += local_cache[read_index - 3] * kernel[3];
#ifdef MODE_GLOW
color_top += local_cache[read_index + 4] * kernel[4];
color_top += local_cache[read_index - 4] * kernel[4];
#endif // MODE_GLOW
vec4 color_bottom = vec4(0.0);
color_bottom += local_cache[read_index + 16] * kernel[0];
@ -135,6 +140,10 @@ void main() {
color_bottom += local_cache[read_index - 1 + 16] * kernel[1];
color_bottom += local_cache[read_index - 2 + 16] * kernel[2];
color_bottom += local_cache[read_index - 3 + 16] * kernel[3];
#ifdef MODE_GLOW
color_bottom += local_cache[read_index + 4 + 16] * kernel[4];
color_bottom += local_cache[read_index - 4 + 16] * kernel[4];
#endif // MODE_GLOW
// rotate samples to take advantage of cache coherency
uint write_index = gl_LocalInvocationID.y * 2 + gl_LocalInvocationID.x * 16;
@ -161,11 +170,15 @@ void main() {
color += temp_cache[index - 1] * kernel[1];
color += temp_cache[index - 2] * kernel[2];
color += temp_cache[index - 3] * kernel[3];
#ifdef MODE_GLOW
color += temp_cache[index + 4] * kernel[4];
color += temp_cache[index - 4] * kernel[4];
#endif // MODE_GLOW
#ifdef MODE_GLOW
if (bool(params.flags & FLAG_GLOW_FIRST_PASS)) {
// Undo tonemap to restore range: https://graphicrants.blogspot.com/2013/12/tone-mapping.html
color /= 1.0 - dot(color.rgb, vec3(0.299, 0.587, 0.114));
color /= 1.0 - dot(color.rgb, vec3(0.299, 0.587, 0.114) / max(params.glow_luminance_cap, 6.0));
}
color *= params.glow_strength;