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Implemented a very simple SSAO in GLES3.

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jon1solution
2025-08-08 14:37:39 -07:00
parent ab6c6eece8
commit 31ee691fbf
9 changed files with 271 additions and 7 deletions
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33
drivers/gles3/shaders/effects/post.glsl
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@@ -10,6 +10,11 @@ USE_LUMINANCE_MULTIPLIER = false
USE_BCS = false
USE_COLOR_CORRECTION = false
USE_1D_LUT = false
USE_SSAO_ABYSS = false
USE_SSAO_LOW = false
USE_SSAO_MED = false
USE_SSAO_HIGH = false
USE_SSAO_MEGA = false
#[vertex]
layout(location = 0) in vec2 vertex_attrib;
@@ -86,6 +91,29 @@ vec3 apply_color_correction(vec3 color) {
#endif // USE_1D_LUT
#endif // USE_COLOR_CORRECTION
#if defined(USE_SSAO_ABYSS) || defined(USE_SSAO_LOW) || defined(USE_SSAO_MED) || defined(USE_SSAO_HIGH) || defined(USE_SSAO_MEGA)
#define USE_SOME_SSAO
uniform float ssao_intensity;
uniform float ssao_radius_frac;
uniform vec2 ssao_prn_UV;
#ifdef USE_MULTIVIEW
// VR will have 2 depth buffers.
uniform sampler2DArray depth_buffer_array; // texunit:3
#else
uniform sampler2D depth_buffer; // texunit:3
#endif
#if defined(USE_SSAO_ABYSS)
// Use the tiny 2-sample version.
#include "../s4ao_micro_inc.glsl"
#elif defined(USE_SSAO_HIGH) || defined(USE_SSAO_MEGA)
// Use the rings version for the higher qualities.
#include "../s4ao_mega_inc.glsl"
#else
// Use the more generic NxN grid version.
#include "../s4ao_inc.glsl"
#endif
#endif
in vec2 uv_interp;
layout(location = 0) out vec4 frag_color;
@@ -131,6 +159,11 @@ void main() {
color.rgb = srgb_to_linear(color.rgb);
#if defined(USE_SOME_SSAO)
// Putting SSAO after the conversion to linear color, though it might be better before the glow.
color.rgb *= s4ao(uv_interp); // The USE_SSAO_X controls the number of samples.
#endif
color.rgb = apply_tonemapping(color.rgb, white);
#ifdef USE_BCS