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Switch to shifts in some places instead of multiplication

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This commit is contained in:
offtkp 2024-07-16 16:23:42 +03:00
parent e5bed23cee
commit 139f35588d
1 changed files with 4 additions and 4 deletions
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8
src/host_shaders/opengl_fragment_shader.frag
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@ -247,12 +247,12 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
return 1.0;
}
uint scale_id = bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_SCALE, int(lut_id) * 4, 3);
uint scale_id = bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_SCALE, int(lut_id) << 2, 3);
float scale = float(1u << scale_id);
if (scale_id >= 6u) scale /= 256.0;
float delta = 1.0;
uint input_id = bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_SELECT, int(lut_id) * 4, 3);
uint input_id = bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_SELECT, int(lut_id) << 2, 3);
switch (input_id) {
case 0u: {
delta = dot(v_normal, normalize(half_vector));
@ -296,7 +296,7 @@ float lightLutLookup(uint environment_id, uint lut_id, uint light_id, vec3 light
}
// 0 = enabled
if (bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_ABS, 1 + 4 * int(lut_id), 1) == 0u) {
if (bitfieldExtract(GPUREG_LIGHTING_LUTINPUT_ABS, 1 + (int(lut_id) << 2), 1) == 0u) {
// Two sided diffuse
if (bitfieldExtract(GPUREG_LIGHTi_CONFIG, 1, 1) == 0u) {
delta = max(delta, 0.0);
@ -347,7 +347,7 @@ void calcLighting(out vec4 primary_color, out vec4 secondary_color) {
vec3 half_vector;
for (uint i = 0u; i < GPUREG_LIGHTING_NUM_LIGHTS; i++) {
light_id = bitfieldExtract(GPUREG_LIGHTING_LIGHT_PERMUTATION, int(i << 2u), 3);
light_id = bitfieldExtract(GPUREG_LIGHTING_LIGHT_PERMUTATION, int(i) << 2, 3);
uint GPUREG_LIGHTi_SPECULAR0 = readPicaReg(0x0140u + 0x10u * light_id);
uint GPUREG_LIGHTi_SPECULAR1 = readPicaReg(0x0141u + 0x10u * light_id);