add sRGB pixel formats to the HALs (8d9da28a) · Commits · e / os / android_system_core

include/system/graphics.h

+28 −1

Original line number	Diff line number	Diff line
		@@ -42,6 +42,13 @@ extern "C" {
		*/

		enum {
		/*
		* "linear" color pixel formats:
		*
		* The pixel formats below contain sRGB data but are otherwise treated
		* as linear formats, i.e.: no special operation is performed when
		* reading or writing into a buffer in one of these formats
		*/
		HAL_PIXEL_FORMAT_RGBA_8888 = 1,
		HAL_PIXEL_FORMAT_RGBX_8888 = 2,
		HAL_PIXEL_FORMAT_RGB_888 = 3,
		@@ -50,7 +57,27 @@ enum {
		HAL_PIXEL_FORMAT_RGBA_5551 = 6,
		HAL_PIXEL_FORMAT_RGBA_4444 = 7,

		/* 0x8 - 0xFF range unavailable */
		/*
		* sRGB color pixel formats:
		*
		* The red, green and blue components are stored in sRGB space, and converted
		* to linear space when read, using the standard sRGB to linear equation:
		*
		* Clinear = Csrgb / 12.92 for Csrgb <= 0.04045
		* = (Csrgb + 0.055 / 1.055)^2.4 for Csrgb > 0.04045
		*
		* When written the inverse transformation is performed:
		*
		* Csrgb = 12.92 * Clinear for Clinear <= 0.0031308
		* = 1.055 * Clinear^(1/2.4) - 0.055 for Clinear > 0.0031308
		*
		*
		* The alpha component, if present, is always stored in linear space and
		* is left unmodified when read or written.
		*
		*/
		HAL_PIXEL_FORMAT_sRGB_A_8888 = 0xC,
		HAL_PIXEL_FORMAT_sRGB_888 = 0xD,

		/*
		* 0x100 - 0x1FF