godotengine/godot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Merge pull request #72914 from JonqsGames/GL-half_to_float_zero_exp

Browse Source 
OpenGl : Handle 0 exponent in float/half conversion
This commit is contained in:
Rémi Verschelde 2023-02-09 09:26:06 +01:00
commit 913a65c044
No known key found for this signature in database
GPG Key ID: C3336907360768E1
1 changed files with 14 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/gles3/shaders/stdlib_inc.glsl
View File

@ -2,13 +2,23 @@
#ifdef USE_GLES_OVER_GL #ifdef USE_GLES_OVER_GL
// Floating point pack/unpack functions are part of the GLSL ES 300 specification used by web and mobile. // Floating point pack/unpack functions are part of the GLSL ES 300 specification used by web and mobile.
uint float2half(uint f) { uint float2half(uint f) {
uint e = f & uint(0x7f800000);
if (e <= uint(0x38000000)) {
return uint(0);
} else {
return ((f >> uint(16)) & uint(0x8000)) | return ((f >> uint(16)) & uint(0x8000)) |
((((f & uint(0x7f800000)) - uint(0x38000000)) >> uint(13)) & uint(0x7c00)) | (((e - uint(0x38000000)) >> uint(13)) & uint(0x7c00)) |
((f >> uint(13)) & uint(0x03ff)); ((f >> uint(13)) & uint(0x03ff));
} }
}
uint half2float(uint h) { uint half2float(uint h) {
return ((h & uint(0x8000)) << uint(16)) | (((h & uint(0x7c00)) + uint(0x1c000)) << uint(13)) | ((h & uint(0x03ff)) << uint(13)); uint h_e = h & uint(0x7c00);
if (h_e == uint(0x0000)) {
return uint(0);
} else {
return ((h & uint(0x8000)) << uint(16)) | ((h_e + uint(0x1c000)) << uint(13)) | ((h & uint(0x03ff)) << uint(13));
}
} }
uint packHalf2x16(vec2 v) { uint packHalf2x16(vec2 v) {