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69 lines
2.0 KiB
Go
69 lines
2.0 KiB
Go
package shader
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// Lighting optionally extends ABI 1: array elements are vec4 with std140 stride 16 independent of Go struct layout; main/normal/user[6]/shadow-array/cookie-array/emission use 0/1/2..7/8/9/10.
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const (
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LightingMaxLights = 8
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LightingSize = 16 + 5*LightingMaxLights*16
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SurfaceSize = 80
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)
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const LightingBlock = `layout(std140) uniform ub4 {
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vec4 aego_ambient_count;
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vec4 aego_light_pose[8];
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vec4 aego_light_color[8];
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vec4 aego_light_cone[8];
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vec4 aego_light_shape[8];
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vec4 aego_light_cookie[8];
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};
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uniform sampler2D tex1;
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uniform highp sampler2DArray tex8;
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uniform highp sampler2DArray tex9;
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#define aego_normal_map tex1
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#define aego_shadow_masks tex8
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#define aego_cookies tex9`
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// The first two fields retain the AESH3 Mesh2D normal layout. AESH4 extends it
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// with independent emission mapping and a per-batch semantic discriminator.
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const SurfaceBlock = `layout(std140) uniform ub5 {
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vec4 aego_surface_normal_uv;
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vec4 aego_surface_normal_local;
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vec4 aego_surface_emission_uv;
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vec4 aego_surface_emission_local;
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vec4 aego_surface_channel_modes;
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};`
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const EmissionBinding = `uniform sampler2D tex10;
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#define aego_emission_map tex10`
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var SurfaceOffsets = [...]struct {
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Name string
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Offset int
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}{
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{"aego_surface_normal_uv", 0},
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{"aego_surface_normal_local", 16},
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{"aego_surface_emission_uv", 32},
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{"aego_surface_emission_local", 48},
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{"aego_surface_channel_modes", 64},
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}
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// PutLightingVec4 writes an explicitly chosen std140 element, not a struct copy.
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func PutLightingVec4(dst []byte, offset int, value [4]float32) {
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for i, v := range value {
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put(dst[offset+i*4:], v)
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}
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}
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// LightingOffsets exposes the expected layout for CPU tests and linked GPU
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// reflection. The shader may optimize whole unused groups, but never move them.
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var LightingOffsets = [...]struct {
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Name string
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Offset int
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}{
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{"aego_ambient_count", 0},
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{"aego_light_pose[0]", 16},
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{"aego_light_color[0]", 144},
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{"aego_light_cone[0]", 272},
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{"aego_light_shape[0]", 400},
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{"aego_light_cookie[0]", 528},
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}
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