[OpenGL] Fix implicit int-to-float-conversion compiler warning.

This CL fixes a minor compiler warning related to the use of 0xFFFFFFFF to divide a float value. It turns out that this integer value cannot be converted to a float without losing one bit of accuracy. Bug: None Change-Id: I34fefd91afb526edbfafd3d8a2378fa6b7bf325d Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38448Reviewed-by: Ben Clayton <bclayton@google.com> Tested-by: David Turner <digit@google.com> Kokoro-Presubmit: David Turner <digit@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

[OpenGL] Fix implicit int-to-float-conversion compiler warning.
42798529 · David 'Digit' Turner · David Turner · d34bb293 · 42798529
Commit 42798529 authored Nov 19, 2019 by David 'Digit' Turner Committed by David Turner Nov 21, 2019
Show whitespace changes
Inline Side-by-side

Showing with 4 additions and 1 deletion

Image.cpp src/OpenGL/common/Image.cpp +4 -1

No files found.
--- a/src/OpenGL/common/Image.cpp
+++ b/src/OpenGL/common/Image.cpp
@@ -940,7 +940,10 @@ namespace egl
 		for(int x = 0; x < width; x++)
 		{
-			destF[x] = (float)sourceD32[x] / 0xFFFFFFFF;
+			// NOTE: Second (float) cast is required to avoid compiler warning:
+			// error: implicit conversion from 'unsigned int' to 'float' changes value from
+			// 4294967295 to 4294967296 [-Werror,-Wimplicit-int-float-conversion]
+			destF[x] = (float)sourceD32[x] / (float)0xFFFFFFFF;
 		}
 	}