UICommon : make grayscale RenderScript compatible with GPU executioncm-12.1

The Adreno GPU RenderScript libraries do not support operations with
double-precision floating point numbers. Update the constants in
grayscale.rs to be single-precision floats so that the script may
run on the GPU.

This resolves warnings like the following seen as a result of the
GPU RenderScript compiler failing. These  were not fatal, but the
script would end up running on the CPUs rather than the GPU.

 W Adreno-RS: <rsdVendorScriptInitQCOM:795>: ERROR: rsdCompileBitcode returned -30

Change-Id: I8c58900c3268b6998d961cd6c9e0c09b0d9971f6

1 files changed, 2 insertions, 2 deletions

diff --git a/src/com/cyngn/uicommon/rs/grayscale.rs b/src/com/cyngn/uicommon/rs/grayscale.rs
index c5d06aa..dd56f85 100644
--- a/src/com/cyngn/uicommon/rs/grayscale.rs
+++ b/src/com/cyngn/uicommon/rs/grayscale.rs
@@ -4,7 +4,7 @@
 
 uchar4 __attribute__((kernel)) grayscale(uchar4 pixelIn, uint32_t x, uint32_t y) {
  
-    uchar grayscale = pixelIn.r * 0.299 + pixelIn.g * 0.587 + pixelIn.b * 0.114;
+    uchar grayscale = pixelIn.r * 0.299f + pixelIn.g * 0.587f + pixelIn.b * 0.114f;
     uchar4 pixelOut;
 
     pixelOut.a = pixelIn.a;
@@ -13,4 +13,4 @@ uchar4 __attribute__((kernel)) grayscale(uchar4 pixelIn, uint32_t x, uint32_t y)
     pixelOut.b = grayscale;
 
     return pixelOut;
-}
\ No newline at end of file
+}