87bdf96449
This commit renames all shader snippet files to conform to the newly introduced naming convention outlined in README.md. The new naming convention uses a `prefix_name.suffix` format to clearly indicate the purpose and target shader stage of each snippet. This improves the overall organization and readability of the shader code, making it easier to understand how each snippet contributes to the shader generation process. No functional changes were made to the shader code itself or source code. This is purely a refactoring for clarity and maintainability.
96 lines
3.1 KiB
GLSL
96 lines
3.1 KiB
GLSL
#if defined(VARIANT_HAS_VSM)
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layout(location = 0) out highp vec4 fragColor;
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#elif defined(VARIANT_HAS_PICKING)
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# if __VERSION__ == 100
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highp vec4 outPicking;
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# else
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# if MATERIAL_FEATURE_LEVEL == 0
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layout(location = 0) out highp vec4 outPicking;
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# else
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layout(location = 0) out highp vec2 outPicking;
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# endif
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# endif
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#else
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// not color output
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#endif
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//------------------------------------------------------------------------------
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// Depth
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//
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// note: VARIANT_HAS_VSM and VARIANT_HAS_PICKING are mutually exclusive
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//------------------------------------------------------------------------------
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highp vec2 computeDepthMomentsVSM(const highp float depth);
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void main() {
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filament_lodBias = frameUniforms.lodBias;
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initObjectUniforms();
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#if defined(MATERIAL_HAS_CUSTOM_DEPTH) || defined(BLEND_MODE_MASKED) || ((defined(BLEND_MODE_TRANSPARENT) || defined(BLEND_MODE_FADE)) && defined(MATERIAL_HAS_TRANSPARENT_SHADOW))
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MaterialInputs inputs;
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initMaterial(inputs);
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material(inputs);
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float alpha = inputs.baseColor.a;
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#if defined(BLEND_MODE_MASKED)
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if (alpha < getMaskThreshold()) {
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discard;
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}
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#endif
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#if defined(MATERIAL_HAS_TRANSPARENT_SHADOW)
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// Interleaved gradient noise, see inline_dithering.fs
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float noise = interleavedGradientNoise(gl_FragCoord.xy);
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if (noise >= alpha) {
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discard;
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}
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#endif
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#endif
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#if defined(VARIANT_HAS_VSM)
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// interpolated depth is stored in vertex_worldPosition.w (see surface_main.vs)
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// we always compute the "negative" side of ELVSM because the cost is small, and this allows
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// EVSM/ELVSM choice to be done on the CPU side more easily.
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highp float depth = vertex_worldPosition.w;
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depth = exp(frameUniforms.vsmExponent * depth);
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fragColor.xy = computeDepthMomentsVSM(depth);
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fragColor.zw = computeDepthMomentsVSM(-1.0 / depth); // requires at least RGBA16F
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#elif defined(VARIANT_HAS_PICKING)
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#if FILAMENT_EFFECTIVE_VERSION == 100
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outPicking.a = mod(float(object_uniforms_objectId / 65536), 256.0) / 255.0;
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outPicking.b = mod(float(object_uniforms_objectId / 256), 256.0) / 255.0;
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outPicking.g = mod(float(object_uniforms_objectId) , 256.0) / 255.0;
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outPicking.r = vertex_position.z / vertex_position.w;
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#else
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outPicking.x = intBitsToFloat(object_uniforms_objectId);
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outPicking.y = vertex_position.z / vertex_position.w;
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#endif
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#if __VERSION__ == 100
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gl_FragData[0] = outPicking;
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#endif
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#else
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// that's it
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#endif
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}
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highp vec2 computeDepthMomentsVSM(const highp float depth) {
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// computes the moments
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// See GPU Gems 3
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// https://developer.nvidia.com/gpugems/gpugems3/part-ii-light-and-shadows/chapter-8-summed-area-variance-shadow-maps
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highp vec2 moments;
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// the first moment is just the depth (average)
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moments.x = depth;
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// compute the 2nd moment over the pixel extents.
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moments.y = depth * depth;
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// the local linear approximation is not correct with a warped depth
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//highp float dx = dFdx(depth);
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//highp float dy = dFdy(depth);
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//moments.y += 0.25 * (dx * dx + dy * dy);
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return moments;
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}
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