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Change colorspace header to an enum to avoid confusion

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This commit is contained in:
Dominic Szablewski 2021-12-08 14:14:51 +01:00
parent d6b1ec673a
commit 947941fbd0
1 changed files with 9 additions and 12 deletions
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21
qoi.h
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@ -87,10 +87,7 @@ struct qoi_header_t {
uint32_t width; // image width in pixels (BE) uint32_t width; // image width in pixels (BE)
uint32_t height; // image height in pixels (BE) uint32_t height; // image height in pixels (BE)
uint8_t channels; // must be 3 (RGB) or 4 (RGBA) uint8_t channels; // must be 3 (RGB) or 4 (RGBA)
uint8_t colorspace; // a bitmap 0000rgba where uint8_t colorspace; // 0 = sRGB with linear alpha, 1 = all channels linear
// - a zero bit indicates sRGBA,
// - a one bit indicates linear (user interpreted)
// colorspace for each channel
}; };
The decoder and encoder start with {r: 0, g: 0, b: 0, a: 255} as the previous The decoder and encoder start with {r: 0, g: 0, b: 0, a: 255} as the previous
@ -220,15 +217,15 @@ extern "C" {
// describes either the input format (for qoi_write, qoi_encode), or is filled // describes either the input format (for qoi_write, qoi_encode), or is filled
// with the description read from the file header (for qoi_read, qoi_decode). // with the description read from the file header (for qoi_read, qoi_decode).
// The colorspace in this qoi_desc is a bitmap with 0000rgba where a 0-bit // The colorspace in this qoi_desc is an enum where
// indicates sRGB and a 1-bit indicates linear colorspace for each channel. You // 0 = sRGB, i.e. gamma scaled RGB channels and a linear alpha channel
// may use one of the predefined constants: QOI_SRGB, QOI_SRGB_LINEAR_ALPHA or // 1 = all channels are linear
// QOI_LINEAR. The colorspace is purely informative. It will be saved to the // You may use the the constants QOI_SRGB or QOI_LINEAR. The colorspace is
// file header, but does not affect en-/decoding in any way. // purely informative. It will be saved to the file header, but does not affect
// en-/decoding in any way.
#define QOI_SRGB 0x00 #define QOI_SRGB 0
#define QOI_SRGB_LINEAR_ALPHA 0x01 #define QOI_LINEAR 1
#define QOI_LINEAR 0x0f
typedef struct { typedef struct {
unsigned int width; unsigned int width;