C Specification
Possible values of VkSurfaceFormatKHR::colorSpace, specifying
the color spaces that a presentation engine can accept, are:
// Provided by VK_KHR_surface
typedef enum VkColorSpaceKHR {
VK_COLOR_SPACE_SRGB_NONLINEAR_KHR = 0,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_DISPLAY_P3_NONLINEAR_EXT = 1000104001,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT = 1000104002,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_DISPLAY_P3_LINEAR_EXT = 1000104003,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_DCI_P3_NONLINEAR_EXT = 1000104004,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_BT709_LINEAR_EXT = 1000104005,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_BT709_NONLINEAR_EXT = 1000104006,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_BT2020_LINEAR_EXT = 1000104007,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_HDR10_ST2084_EXT = 1000104008,
// Provided by VK_EXT_swapchain_colorspace
// VK_COLOR_SPACE_DOLBYVISION_EXT is legacy, but no reason was given in the API XML
VK_COLOR_SPACE_DOLBYVISION_EXT = 1000104009,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_HDR10_HLG_EXT = 1000104010,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_ADOBERGB_LINEAR_EXT = 1000104011,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_ADOBERGB_NONLINEAR_EXT = 1000104012,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_PASS_THROUGH_EXT = 1000104013,
// Provided by VK_EXT_swapchain_colorspace
VK_COLOR_SPACE_EXTENDED_SRGB_NONLINEAR_EXT = 1000104014,
} VkColorSpaceKHR;Description
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VK_COLOR_SPACE_SRGB_NONLINEAR_KHR specifies support for the images in sRGB color space, encoded according to the sRGB specification.
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VK_COLOR_SPACE_DISPLAY_P3_NONLINEAR_EXT specifies support for the images in Display-P3 color space, encoded using a Display-P3 transfer function.
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VK_COLOR_SPACE_EXTENDED_SRGB_LINEAR_EXT specifies support for the images in extended sRGB color space, encoded using a linear transfer function.
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VK_COLOR_SPACE_EXTENDED_SRGB_NONLINEAR_EXT specifies support for the images in extended sRGB color space, encoded according to the scRGB specification.
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VK_COLOR_SPACE_DISPLAY_P3_LINEAR_EXT specifies support for the images in Display-P3 color space, encoded using a linear transfer function.
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VK_COLOR_SPACE_DCI_P3_NONLINEAR_EXT specifies support for the images in DCI-P3 color space, encoded according to the DCI-P3 specification. Note that values in such an image are interpreted as XYZ encoded color data by the presentation engine.
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VK_COLOR_SPACE_BT709_LINEAR_EXT specifies support for the images in BT709 color space, encoded using a linear transfer function.
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VK_COLOR_SPACE_BT709_NONLINEAR_EXT specifies support for the images in BT709 color space, encoded according to the BT709 specification.
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VK_COLOR_SPACE_BT2020_LINEAR_EXT specifies support for the images in BT2020 color space, encoded using a linear transfer function.
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VK_COLOR_SPACE_HDR10_ST2084_EXT specifies support for the images in HDR10 (BT2020) color space, encoded according to SMPTE ST2084 Perceptual Quantizer (PQ) specification.
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VK_COLOR_SPACE_HDR10_HLG_EXT specifies support for the images in HDR10 (BT2020) color space, encoded according to the Hybrid Log Gamma (HLG) specification.
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VK_COLOR_SPACE_ADOBERGB_LINEAR_EXT specifies support for images in Adobe RGB color space, encoded using a linear transfer function.
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VK_COLOR_SPACE_ADOBERGB_NONLINEAR_EXT specifies support for the images in Adobe RGB color space, encoded according to the Adobe RGB specification (approximately Gamma 2.2).
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VK_COLOR_SPACE_PASS_THROUGH_EXT specifies that color components are used “as is”. This is intended to allow applications to supply data for color spaces not described here.
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Note
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In older versions of the |
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Note
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For a traditional “Linear” or non-gamma transfer function color space use VK_COLOR_SPACE_PASS_THROUGH_EXT. |
The presentation engine interprets the pixel values of the R, G, and B components as having been encoded using an appropriate transfer function. Applications should ensure that the appropriate transfer function has been applied. Texel encode requires that all implementations implicitly apply the sRGB EOTF-1 on R, G, and B components when shaders write to an sRGB pixel format image, which is useful for sRGB color spaces. For sRGB color spaces with other pixel formats, or other non-linear color spaces, applications can apply the transfer function explicitly in a shader. The A channel is always interpreted as linearly encoded.
This extension defines enums for VkColorSpaceKHR that correspond to the following color spaces:
| Name | Red Primary | Green Primary | Blue Primary | White-point | Transfer function |
|---|---|---|---|---|---|
DCI-P3 |
1.000, 0.000 |
0.000, 1.000 |
0.000, 0.000 |
0.3333, 0.3333 |
DCI P3 |
Display-P3 |
0.680, 0.320 |
0.265, 0.690 |
0.150, 0.060 |
0.3127, 0.3290 (D65) |
Display-P3 |
BT709 |
0.640, 0.330 |
0.300, 0.600 |
0.150, 0.060 |
0.3127, 0.3290 (D65) |
BT709 |
sRGB |
0.640, 0.330 |
0.300, 0.600 |
0.150, 0.060 |
0.3127, 0.3290 (D65) |
sRGB |
extended sRGB |
0.640, 0.330 |
0.300, 0.600 |
0.150, 0.060 |
0.3127, 0.3290 (D65) |
scRGB |
HDR10_ST2084 |
0.708, 0.292 |
0.170, 0.797 |
0.131, 0.046 |
0.3127, 0.3290 (D65) |
ST2084 PQ |
HDR10_HLG |
0.708, 0.292 |
0.170, 0.797 |
0.131, 0.046 |
0.3127, 0.3290 (D65) |
HLG |
Adobe RGB |
0.640, 0.330 |
0.210, 0.710 |
0.150, 0.060 |
0.3127, 0.3290 (D65) |
Adobe RGB |
The transfer functions are described in the “Transfer Functions” chapter of the Khronos Data Format Specification.
Except Display-P3 OETF, which is:
where L is the linear value of a color component and E is the encoded value (as stored in the image in memory).
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Note
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For most uses, the sRGB OETF is equivalent. |
Document Notes
For more information, see the Vulkan Specification.
This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.