Merge "clamp & round alpha" into lmp-dev (d2a93632) · Commits · e / os / android_frameworks_base

libs/hwui/RenderProperties.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -209,7 +209,7 @@ public:
		}

		bool setAlpha(float alpha) {
		alpha = fminf(1.0f, fmaxf(0.0f, alpha));
		alpha = MathUtils::clampAlpha(alpha);
		return RP_SET(mPrimitiveFields.mAlpha, alpha);
		}

+11 −0

Original line number	Diff line number	Diff line
		@@ -20,6 +20,7 @@ namespace android {
		namespace uirenderer {

		#define NON_ZERO_EPSILON (0.001f)
		#define ALPHA_EPSILON (0.001f)

		class MathUtils {
		public:
		@@ -34,6 +35,16 @@ public:
		return value >= NON_ZERO_EPSILON;
		}

		inline static float clampAlpha(float alpha) {
		if (alpha <= ALPHA_EPSILON) {
		return 0;
		} else if (alpha >= (1 - ALPHA_EPSILON)) {
		return 1;
		} else {
		return alpha;
		}
		}

		inline static bool areEqual(float valueA, float valueB) {
		return isZero(valueA - valueB);
		}