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Add color mode enums 

am: bf8132a7c1

Change-Id: I9fcf65efe519cc41358f5031741b5c4d3024cd9f
This commit is contained in:
Courtney Goeltzenleuchter 2016-06-22 00:18:20 +00:00 committed by android-build-merger
parent 3a72d0fc79 bf8132a7c1
commit b7d9991277
1 changed files with 230 additions and 0 deletions
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230
include/system/graphics.h
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@ -1134,6 +1134,236 @@ typedef enum android_dataspace {
} android_dataspace_t;
/*
* Color modes that may be supported by a display.
*
* Definitions:
* Rendering intent generally defines the goal in mapping a source (input)
* color to a destination device color for a given color mode.
*
* It is important to keep in mind three cases where mapping may be applied:
* 1. The source gamut is much smaller than the destination (display) gamut
* 2. The source gamut is much larger than the destination gamut (this will
* ordinarily be handled using colorimetric rendering, below)
* 3. The source and destination gamuts are roughly equal, although not
* completely overlapping
* Also, a common requirement for mappings is that skin tones should be
* preserved, or at least remain natural in appearance.
*
* Colorimetric Rendering Intent (All cases):
* Colorimetric indicates that colors should be preserved. In the case
* that the source gamut lies wholly within the destination gamut or is
* about the same (#1, #3), this will simply mean that no manipulations
* (no saturation boost, for example) are applied. In the case where some
* source colors lie outside the destination gamut (#2, #3), those will
* need to be mapped to colors that are within the destination gamut,
* while the already in-gamut colors remain unchanged.
*
* Non-colorimetric transforms can take many forms. There are no hard
* rules and it's left to the implementation to define.
* Two common intents are described below.
*
* Stretched-Gamut Enhancement Intent (Source < Destination):
* When the destination gamut is much larger than the source gamut (#1), the
* source primaries may be redefined to reflect the full extent of the
* destination space, or to reflect an intermediate gamut.
* Skin-tone preservation would likely be applied. An example might be sRGB
* input displayed on a DCI-P3 capable device, with skin-tone preservation.
*
* Within-Gamut Enhancement Intent (Source >= Destination):
* When the device (destination) gamut is not larger than the source gamut
* (#2 or #3), but the appearance of a larger gamut is desired, techniques
* such as saturation boost may be applied to the source colors. Skin-tone
* preservation may be applied. There is no unique method for within-gamut
* enhancement; it would be defined within a flexible color mode.
*
*/
typedef enum android_color_mode {
/*
* HAL_COLOR_MODE_DEFAULT is the "native" gamut of the display.
* White Point: Vendor/OEM defined
* Panel Gamma: Vendor/OEM defined (typically 2.2)
* Rendering Intent: Vendor/OEM defined (typically 'enhanced')
*/
HAL_COLOR_MODE_NATIVE = 0,
/*
* HAL_COLOR_MODE_STANDARD_BT601_625 corresponds with display
* settings that implement the ITU-R Recommendation BT.601
* or Rec 601. Using 625 line version
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_625 = 1,
/*
* Primaries:
* x y
* green 0.290 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.222, KB = 0.071 luminance interpretation
* for RGB conversion.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_625_UNADJUSTED = 2,
/*
* Primaries:
* x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* KR = 0.299, KB = 0.114. This adjusts the luminance interpretation
* for RGB conversion from the one purely determined by the primaries
* to minimize the color shift into RGB space that uses BT.709
* primaries.
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_525 = 3,
/*
* Primaries:
* x y
* green 0.310 0.595
* blue 0.155 0.070
* red 0.630 0.340
* white (D65) 0.3127 0.3290
*
* Use the unadjusted KR = 0.212, KB = 0.087 luminance interpretation
* for RGB conversion (as in SMPTE 240M).
*
* Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.500 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear)^(0.45) – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT601_525_UNADJUSTED = 4,
/*
* HAL_COLOR_MODE_REC709 corresponds with display settings that implement
* the ITU-R Recommendation BT.709 / Rec. 709 for high-definition television.
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.300 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* HDTV REC709 Inverse Gamma Correction (IGC): V represents normalized
* (with [0 to 1] range) value of R, G, or B.
*
* if Vnonlinear < 0.081
* Vlinear = Vnonlinear / 4.5
* else
* Vlinear = ((Vnonlinear + 0.099) / 1.099) ^ (1/0.45)
*
* HDTV REC709 Gamma Correction (GC):
*
* if Vlinear < 0.018
* Vnonlinear = 4.5 * Vlinear
* else
* Vnonlinear = 1.099 * (Vlinear) ^ 0.45 – 0.099
*/
HAL_COLOR_MODE_STANDARD_BT709 = 5,
/*
* HAL_COLOR_MODE_DCI_P3 corresponds with display settings that implement
* SMPTE EG 432-1 and SMPTE RP 431-2
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.265 0.690
* blue 0.150 0.060
* red 0.680 0.320
* white (D65) 0.3127 0.3290
*
* Gamma: 2.2
*/
HAL_COLOR_MODE_DCI_P3 = 6,
/*
* HAL_COLOR_MODE_SRGB corresponds with display settings that implement
* the sRGB color space. Uses the same primaries as ITU-R Recommendation
* BT.709
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.300 0.600
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* PC/Internet (sRGB) Inverse Gamma Correction (IGC):
*
* if Vnonlinear ≤ 0.03928
* Vlinear = Vnonlinear / 12.92
* else
* Vlinear = ((Vnonlinear + 0.055)/1.055) ^ 2.4
*
* PC/Internet (sRGB) Gamma Correction (GC):
*
* if Vlinear ≤ 0.0031308
* Vnonlinear = 12.92 * Vlinear
* else
* Vnonlinear = 1.055 * (Vlinear)^(1/2.4) – 0.055
*/
HAL_COLOR_MODE_SRGB = 7,
/*
* HAL_COLOR_MODE_ADOBE_RGB corresponds with the RGB color space developed
* by Adobe Systems, Inc. in 1998.
* Rendering Intent: Colorimetric
* Primaries:
* x y
* green 0.210 0.710
* blue 0.150 0.060
* red 0.640 0.330
* white (D65) 0.3127 0.3290
*
* Gamma: 2.2
*/
HAL_COLOR_MODE_ADOBE_RGB = 8
} android_color_mode_t;
/*
* Color transforms that may be applied by hardware composer to the whole
* display.