Loading include/system/graphics.h +230 −0 Original line number Diff line number Diff line Loading @@ -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. Loading Loading
include/system/graphics.h +230 −0 Original line number Diff line number Diff line Loading @@ -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. Loading
