4226d56ca9
As of clang-format 6.0.1, putting the `/* clang-format off */` hint around our "invalid" `[vertex]` and `[shader]` statements isn't enough to prevent a bogus indent of the next comments and first valid statement, so we need to enclose that first valid statement in the unformatted chunk.
291 lines
8.7 KiB
GLSL
291 lines
8.7 KiB
GLSL
/* clang-format off */
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[vertex]
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layout(location = 0) in highp vec4 vertex_attrib;
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/* clang-format on */
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layout(location = 4) in vec2 uv_in;
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out vec2 uv_interp;
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#ifdef USE_BLUR_SECTION
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uniform vec4 blur_section;
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#endif
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void main() {
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uv_interp = uv_in;
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gl_Position = vertex_attrib;
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#ifdef USE_BLUR_SECTION
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uv_interp = blur_section.xy + uv_interp * blur_section.zw;
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gl_Position.xy = (blur_section.xy + (gl_Position.xy * 0.5 + 0.5) * blur_section.zw) * 2.0 - 1.0;
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#endif
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}
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/* clang-format off */
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[fragment]
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#if !defined(GLES_OVER_GL)
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precision mediump float;
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#endif
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/* clang-format on */
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in vec2 uv_interp;
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uniform sampler2D source_color; //texunit:0
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#ifdef SSAO_MERGE
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uniform sampler2D source_ssao; //texunit:1
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#endif
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uniform float lod;
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uniform vec2 pixel_size;
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layout(location = 0) out vec4 frag_color;
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#ifdef SSAO_MERGE
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uniform vec4 ssao_color;
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#endif
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#if defined(GLOW_GAUSSIAN_HORIZONTAL) || defined(GLOW_GAUSSIAN_VERTICAL)
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uniform float glow_strength;
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#endif
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#if defined(DOF_FAR_BLUR) || defined(DOF_NEAR_BLUR)
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#ifdef DOF_QUALITY_LOW
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const int dof_kernel_size = 5;
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const int dof_kernel_from = 2;
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const float dof_kernel[5] = float[](0.153388, 0.221461, 0.250301, 0.221461, 0.153388);
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#endif
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#ifdef DOF_QUALITY_MEDIUM
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const int dof_kernel_size = 11;
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const int dof_kernel_from = 5;
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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);
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#endif
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#ifdef DOF_QUALITY_HIGH
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const int dof_kernel_size = 21;
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const int dof_kernel_from = 10;
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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);
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#endif
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uniform sampler2D dof_source_depth; //texunit:1
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uniform float dof_begin;
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uniform float dof_end;
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uniform vec2 dof_dir;
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uniform float dof_radius;
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#ifdef DOF_NEAR_BLUR_MERGE
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uniform sampler2D source_dof_original; //texunit:2
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#endif
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#endif
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#ifdef GLOW_FIRST_PASS
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uniform float exposure;
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uniform float white;
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#ifdef GLOW_USE_AUTO_EXPOSURE
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uniform highp sampler2D source_auto_exposure; //texunit:1
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uniform highp float auto_exposure_grey;
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#endif
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uniform float glow_bloom;
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uniform float glow_hdr_threshold;
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uniform float glow_hdr_scale;
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#endif
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uniform float camera_z_far;
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uniform float camera_z_near;
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void main() {
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#ifdef GAUSSIAN_HORIZONTAL
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vec2 pix_size = pixel_size;
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pix_size *= 0.5; //reading from larger buffer, so use more samples
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vec4 color = textureLod(source_color, uv_interp + vec2(0.0, 0.0) * pix_size, lod) * 0.214607;
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color += textureLod(source_color, uv_interp + vec2(1.0, 0.0) * pix_size, lod) * 0.189879;
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color += textureLod(source_color, uv_interp + vec2(2.0, 0.0) * pix_size, lod) * 0.157305;
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color += textureLod(source_color, uv_interp + vec2(3.0, 0.0) * pix_size, lod) * 0.071303;
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color += textureLod(source_color, uv_interp + vec2(-1.0, 0.0) * pix_size, lod) * 0.189879;
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color += textureLod(source_color, uv_interp + vec2(-2.0, 0.0) * pix_size, lod) * 0.157305;
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color += textureLod(source_color, uv_interp + vec2(-3.0, 0.0) * pix_size, lod) * 0.071303;
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frag_color = color;
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#endif
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#ifdef GAUSSIAN_VERTICAL
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vec4 color = textureLod(source_color, uv_interp + vec2(0.0, 0.0) * pixel_size, lod) * 0.38774;
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color += textureLod(source_color, uv_interp + vec2(0.0, 1.0) * pixel_size, lod) * 0.24477;
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color += textureLod(source_color, uv_interp + vec2(0.0, 2.0) * pixel_size, lod) * 0.06136;
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color += textureLod(source_color, uv_interp + vec2(0.0, -1.0) * pixel_size, lod) * 0.24477;
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color += textureLod(source_color, uv_interp + vec2(0.0, -2.0) * pixel_size, lod) * 0.06136;
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frag_color = color;
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#endif
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//glow uses larger sigma for a more rounded blur effect
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#ifdef GLOW_GAUSSIAN_HORIZONTAL
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vec2 pix_size = pixel_size;
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pix_size *= 0.5; //reading from larger buffer, so use more samples
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vec4 color = textureLod(source_color, uv_interp + vec2(0.0, 0.0) * pix_size, lod) * 0.174938;
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color += textureLod(source_color, uv_interp + vec2(1.0, 0.0) * pix_size, lod) * 0.165569;
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color += textureLod(source_color, uv_interp + vec2(2.0, 0.0) * pix_size, lod) * 0.140367;
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color += textureLod(source_color, uv_interp + vec2(3.0, 0.0) * pix_size, lod) * 0.106595;
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color += textureLod(source_color, uv_interp + vec2(-1.0, 0.0) * pix_size, lod) * 0.165569;
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color += textureLod(source_color, uv_interp + vec2(-2.0, 0.0) * pix_size, lod) * 0.140367;
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color += textureLod(source_color, uv_interp + vec2(-3.0, 0.0) * pix_size, lod) * 0.106595;
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color *= glow_strength;
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frag_color = color;
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#endif
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#ifdef GLOW_GAUSSIAN_VERTICAL
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vec4 color = textureLod(source_color, uv_interp + vec2(0.0, 0.0) * pixel_size, lod) * 0.288713;
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color += textureLod(source_color, uv_interp + vec2(0.0, 1.0) * pixel_size, lod) * 0.233062;
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color += textureLod(source_color, uv_interp + vec2(0.0, 2.0) * pixel_size, lod) * 0.122581;
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color += textureLod(source_color, uv_interp + vec2(0.0, -1.0) * pixel_size, lod) * 0.233062;
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color += textureLod(source_color, uv_interp + vec2(0.0, -2.0) * pixel_size, lod) * 0.122581;
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color *= glow_strength;
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frag_color = color;
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#endif
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#ifdef DOF_FAR_BLUR
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vec4 color_accum = vec4(0.0);
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float depth = textureLod(dof_source_depth, uv_interp, 0.0).r;
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depth = depth * 2.0 - 1.0;
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#ifdef USE_ORTHOGONAL_PROJECTION
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depth = ((depth + (camera_z_far + camera_z_near) / (camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near)) / 2.0;
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#else
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depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - depth * (camera_z_far - camera_z_near));
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#endif
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float amount = smoothstep(dof_begin, dof_end, depth);
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float k_accum = 0.0;
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for (int i = 0; i < dof_kernel_size; i++) {
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int int_ofs = i - dof_kernel_from;
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vec2 tap_uv = uv_interp + dof_dir * float(int_ofs) * amount * dof_radius;
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float tap_k = dof_kernel[i];
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float tap_depth = texture(dof_source_depth, tap_uv, 0.0).r;
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tap_depth = tap_depth * 2.0 - 1.0;
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#ifdef USE_ORTHOGONAL_PROJECTION
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tap_depth = ((tap_depth + (camera_z_far + camera_z_near) / (camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near)) / 2.0;
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#else
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tap_depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - tap_depth * (camera_z_far - camera_z_near));
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#endif
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float tap_amount = mix(smoothstep(dof_begin, dof_end, tap_depth), 1.0, int_ofs == 0);
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tap_amount *= tap_amount * tap_amount; //prevent undesired glow effect
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vec4 tap_color = textureLod(source_color, tap_uv, 0.0) * tap_k;
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k_accum += tap_k * tap_amount;
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color_accum += tap_color * tap_amount;
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}
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if (k_accum > 0.0) {
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color_accum /= k_accum;
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}
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frag_color = color_accum; ///k_accum;
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#endif
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#ifdef DOF_NEAR_BLUR
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vec4 color_accum = vec4(0.0);
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float max_accum = 0.0;
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for (int i = 0; i < dof_kernel_size; i++) {
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int int_ofs = i - dof_kernel_from;
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vec2 tap_uv = uv_interp + dof_dir * float(int_ofs) * dof_radius;
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float ofs_influence = max(0.0, 1.0 - float(abs(int_ofs)) / float(dof_kernel_from));
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float tap_k = dof_kernel[i];
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vec4 tap_color = textureLod(source_color, tap_uv, 0.0);
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float tap_depth = texture(dof_source_depth, tap_uv, 0.0).r;
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tap_depth = tap_depth * 2.0 - 1.0;
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#ifdef USE_ORTHOGONAL_PROJECTION
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tap_depth = ((tap_depth + (camera_z_far + camera_z_near) / (camera_z_far - camera_z_near)) * (camera_z_far - camera_z_near)) / 2.0;
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#else
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tap_depth = 2.0 * camera_z_near * camera_z_far / (camera_z_far + camera_z_near - tap_depth * (camera_z_far - camera_z_near));
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#endif
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float tap_amount = 1.0 - smoothstep(dof_end, dof_begin, tap_depth);
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tap_amount *= tap_amount * tap_amount; //prevent undesired glow effect
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#ifdef DOF_NEAR_FIRST_TAP
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tap_color.a = 1.0 - smoothstep(dof_end, dof_begin, tap_depth);
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#endif
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max_accum = max(max_accum, tap_amount * ofs_influence);
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color_accum += tap_color * tap_k;
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}
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color_accum.a = max(color_accum.a, sqrt(max_accum));
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#ifdef DOF_NEAR_BLUR_MERGE
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vec4 original = textureLod(source_dof_original, uv_interp, 0.0);
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color_accum = mix(original, color_accum, color_accum.a);
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#endif
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#ifndef DOF_NEAR_FIRST_TAP
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//color_accum=vec4(vec3(color_accum.a),1.0);
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#endif
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frag_color = color_accum;
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#endif
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#ifdef GLOW_FIRST_PASS
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#ifdef GLOW_USE_AUTO_EXPOSURE
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frag_color /= texelFetch(source_auto_exposure, ivec2(0, 0), 0).r / auto_exposure_grey;
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#endif
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frag_color *= exposure;
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float luminance = max(frag_color.r, max(frag_color.g, frag_color.b));
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float feedback = max(smoothstep(glow_hdr_threshold, glow_hdr_threshold + glow_hdr_scale, luminance), glow_bloom);
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frag_color *= feedback;
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#endif
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#ifdef SIMPLE_COPY
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vec4 color = textureLod(source_color, uv_interp, 0.0);
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frag_color = color;
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#endif
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#ifdef SSAO_MERGE
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vec4 color = textureLod(source_color, uv_interp, 0.0);
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float ssao = textureLod(source_ssao, uv_interp, 0.0).r;
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frag_color = vec4(mix(color.rgb, color.rgb * mix(ssao_color.rgb, vec3(1.0), ssao), color.a), 1.0);
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#endif
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}
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