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Pack sampler configurations in bitfields instead of bool arrays

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offtkp 2024-07-18 02:51:08 +03:00
parent 2ca886f64f
commit 7e7856fa44
1 changed files with 32 additions and 17 deletions
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49
src/host_shaders/opengl_fragment_shader.frag
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@ -39,18 +39,37 @@ vec3 normal;
// Holds the enabled state of the lighting samples for various PICA configurations
// As explained in https://www.3dbrew.org/wiki/GPU/Internal_Registers#GPUREG_LIGHTING_CONFIG0
const bool samplerEnabled[9 * 7] = bool[9 * 7](
// D0 D1 SP FR RB RG RR
true, false, true, false, false, false, true, // Configuration 0: D0, SP, RR
false, false, true, true, false, false, true, // Configuration 1: FR, SP, RR
true, true, false, false, false, false, true, // Configuration 2: D0, D1, RR
true, true, false, true, false, false, false, // Configuration 3: D0, D1, FR
true, true, true, false, true, true, true, // Configuration 4: All except for FR
true, false, true, true, true, true, true, // Configuration 5: All except for D1
true, true, true, true, false, false, true, // Configuration 6: All except for RB and RG
false, false, false, false, false, false, false, // Configuration 7: Unused
true, true, true, true, true, true, true // Configuration 8: All
);
// const bool samplerEnabled[9 * 7] = bool[9 * 7](
// // D0 D1 SP FR RB RG RR
// true, false, true, false, false, false, true, // Configuration 0: D0, SP, RR
// false, false, true, true, false, false, true, // Configuration 1: FR, SP, RR
// true, true, false, false, false, false, true, // Configuration 2: D0, D1, RR
// true, true, false, true, false, false, false, // Configuration 3: D0, D1, FR
// true, true, true, false, true, true, true, // Configuration 4: All except for FR
// true, false, true, true, true, true, true, // Configuration 5: All except for D1
// true, true, true, true, false, false, true, // Configuration 6: All except for RB and RG
// false, false, false, false, false, false, false, // Configuration 7: Unused
// true, true, true, true, true, true, true // Configuration 8: All
// );
// The above have been condensed to two uints to save space
// You can confirm they are the same by running the following:
// for (int i = 0; i < 9 * 7; i++) {
// unsigned arrayIndex = (i >> 5);
// bool b = (samplerEnabledBitfields[arrayIndex] & (1u << (i & 31))) != 0u;
// if (samplerEnabled[i] == b) {
// printf("%d: happy\n", i);
// } else {
// printf("%d: unhappy\n", i);
// }
// }
const uint samplerEnabledBitfields[2] = uint[2](0x7170e645u, 0x7f013fefu);
bool isSamplerEnabled(uint environment_id, uint lut_id) {
uint index = 7 * environment_id + lut_id;
uint arrayIndex = (index >> 5);
return (samplerEnabledBitfields[arrayIndex] & (1u << (index & 31))) != 0u;
}
// OpenGL ES 1.1 reference pages for TEVs (this is what the PICA200 implements):
// https://registry.khronos.org/OpenGL-Refpages/es1.1/xhtml/glTexEnv.xml
@ -198,10 +217,6 @@ float decodeFP(uint hex, uint E, uint M) {
return uintBitsToFloat(hex);
}
bool isSamplerEnabled(uint environment_id, uint lut_id) {
return samplerEnabled[7 * environment_id + lut_id];
}
float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light_vector, vec3 half_vector) {
uint lut_index;
// lut_id is one of these values
@ -485,7 +500,7 @@ void calcLighting(out vec4 primary_color, out vec4 secondary_color) {
secondary_color = clamp(specular_sum, vec4(0.0), vec4(1.0));
if (error_unimpl) {
secondary_color = primary_color = unimpl_color;
// secondary_color = primary_color = unimpl_color;
}
}