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Added the concept of colorspace to the SDL renderer

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This allows color operations to happen in linear space between sRGB input and sRGB output. This is currently supported on the direct3d11, direct3d12 and opengl renderers.

This is a good resource on blending in linear space vs sRGB space:
https://blog.johnnovak.net/2016/09/21/what-every-coder-should-know-about-gamma/

Also added testcolorspace to verify colorspace changes
This commit is contained in:
Sam Lantinga
2024-01-29 18:32:27 -08:00
parent 554f0625d3
commit f257eb4481
9 changed files with 648 additions and 40 deletions
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10
include/SDL3/SDL_pixels.h
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@@ -196,8 +196,14 @@ typedef enum
(SDL_PIXELORDER(format) == SDL_PACKEDORDER_BGRA))))
#define SDL_ISPIXELFORMAT_10BIT(format) \
((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_PACKED32) && \
(SDL_PIXELLAYOUT(format) == SDL_PACKEDLAYOUT_2101010))
(!SDL_ISPIXELFORMAT_FOURCC(format) && \
((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_PACKED32) && \
(SDL_PIXELLAYOUT(format) == SDL_PACKEDLAYOUT_2101010)))
#define SDL_ISPIXELFORMAT_FLOAT(format) \
(!SDL_ISPIXELFORMAT_FOURCC(format) && \
((SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYF16) || \
(SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYF32)))
/* The flag is set to 1 because 0x1? is not in the printable ASCII range */
#define SDL_ISPIXELFORMAT_FOURCC(format) \