New format conversion classes and routines
- A new routine has been added to convert from any component of
8bit sRGB data to 8bit linear RGB, using a precomputed array.
- Two new classes have been added to easily convert to and from
the RGB9E5 format and the R11G11B10F format.
Change-Id: I85ca58bed30bcd5a9130bca5040d351badabb19e
Reviewed-on: https://swiftshader-review.googlesource.com/3990
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/Common/Math.cpp b/src/Common/Math.cpp
index d0e488c..e8ae3d2 100644
--- a/src/Common/Math.cpp
+++ b/src/Common/Math.cpp
@@ -31,4 +31,18 @@
return hash;
}
+
+ unsigned char sRGB8toLinear8(unsigned char value)
+ {
+ static unsigned char sRGBtoLinearTable[256] = { 255 };
+ if(sRGBtoLinearTable[0] == 255)
+ {
+ for(int i = 0; i < 256; i++)
+ {
+ sRGBtoLinearTable[i] = static_cast<unsigned char>(sw::sRGBtoLinear(static_cast<float>(i) / 255.0f) * 255.0f + 0.5f);
+ }
+ }
+
+ return sRGBtoLinearTable[value];
+ }
}
