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Fix GPUParticles are not rendered for older AMD GPUs with OpenGL+Angle 

Using a better and faster algorithm for the float conversions
This commit is contained in:
Marius Hanl 2024-09-01 00:10:00 +02:00
parent 61598c5c88
commit 9cc9df52eb
1 changed files with 8 additions and 10 deletions
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18
drivers/gles3/shaders/stdlib_inc.glsl
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@ -9,19 +9,17 @@
// Floating point pack/unpack functions are part of the GLSL ES 300 specification used by web and mobile.
uint float2half(uint f) {
uint e = f & uint(0x7f800000);
if (e <= uint(0x38000000)) {
return uint(0);
} else {
return ((f >> uint(16)) & uint(0x8000)) |
(((e - uint(0x38000000)) >> uint(13)) & uint(0x7c00)) |
((f >> uint(13)) & uint(0x03ff));
}
uint b = f + uint(0x00001000);
uint e = (b & uint(0x7F800000)) >> 23;
uint m = b & uint(0x007FFFFF);
return (b & uint(0x80000000)) >> uint(16) | uint(e > uint(112)) * ((((e - uint(112)) << uint(10)) & uint(0x7C00)) | m >> uint(13)) | (uint(e < uint(113)) & uint(e > uint(101))) * ((((uint(0x007FF000) + m) >> (uint(125) - e)) + uint(1)) >> uint(1)) | uint(e > uint(143)) * uint(0x7FFF);
}
uint half2float(uint h) {
uint h_e = h & uint(0x7c00);
return ((h & uint(0x8000)) << uint(16)) | uint((h_e >> uint(10)) != uint(0)) * (((h_e + uint(0x1c000)) << uint(13)) | ((h & uint(0x03ff)) << uint(13)));
uint e = (h & uint(0x7C00)) >> uint(10);
uint m = (h & uint(0x03FF)) << uint(13);
uint v = m >> uint(23);
return (h & uint(0x8000)) << uint(16) | uint(e != uint(0)) * ((e + uint(112)) << uint(23) | m) | (uint(e == uint(0)) & uint(m != uint(0))) * ((v - uint(37)) << uint(23) | ((m << (uint(150) - v)) & uint(0x007FE000)));
}
uint godot_packHalf2x16(vec2 v) {