13cfad43b7
This significantly improve the depth-buffer resolution utilization through the near-infinity range on Metal and Vulkan. On OpenGL, this benefit is only seen when glClipControl is available. The user-facing clip plane is unchanged [-1,1], the conversion happens in filament's vertex shaders. The bulk of this change consists in: - invert the clip space's z in the vertex shader - clear the depth buffer with 0 - invert all depth function comparisons - fix all screen-space effects, e.g. ssao, DoF - fix shadows and shadow biases - use floating-point depth - add a driver API to query which clip-space is used - add glClipControl support to the gl backend
39 lines
1.2 KiB
GLSL
39 lines
1.2 KiB
GLSL
void main() {
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// Initialize the vertex shader inputs to sensible default values.
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PostProcessVertexInputs inputs;
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initPostProcessMaterialVertex(inputs);
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inputs.normalizedUV = position.xy * 0.5 + 0.5;
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inputs.texelCoords = inputs.normalizedUV * frameUniforms.resolution.xy;
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// In Vulkan and Metal, texture coords are Y-down. In OpenGL, texture coords are Y-up.
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#if defined(TARGET_METAL_ENVIRONMENT) || defined(TARGET_VULKAN_ENVIRONMENT)
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inputs.texelCoords.y = frameUniforms.resolution.y - inputs.texelCoords.y;
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inputs.normalizedUV.y = 1.0 - inputs.normalizedUV.y;
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#endif
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gl_Position = getPosition();
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// Adjust clip-space
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gl_Position.z = dot(gl_Position.zw, frameUniforms.clipControl.xy);
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// Invoke user code
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postProcessVertex(inputs);
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vertex_uv = inputs.texelCoords;
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// Handle user-defined interpolated attributes
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#if defined(VARIABLE_CUSTOM0)
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VARIABLE_CUSTOM_AT0 = inputs.VARIABLE_CUSTOM0;
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#endif
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#if defined(VARIABLE_CUSTOM1)
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VARIABLE_CUSTOM_AT1 = inputs.VARIABLE_CUSTOM1;
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#endif
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#if defined(VARIABLE_CUSTOM2)
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VARIABLE_CUSTOM_AT2 = inputs.VARIABLE_CUSTOM2;
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#endif
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#if defined(VARIABLE_CUSTOM3)
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VARIABLE_CUSTOM_AT3 = inputs.VARIABLE_CUSTOM3;
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#endif
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}
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