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Keep SDR white point and HDR headroom defaults in one place

This commit is contained in:
Sam Lantinga 2024-02-22 14:47:58 -08:00
parent aeae202207
commit 1fb5b9672e
3 changed files with 16 additions and 12 deletions
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12
src/render/SDL_render.c
View File

@ -1239,8 +1239,6 @@ SDL_Texture *SDL_CreateTextureWithProperties(SDL_Renderer *renderer, SDL_Propert
int w = (int)SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_WIDTH_NUMBER, 0);
int h = (int)SDL_GetNumberProperty(props, SDL_PROP_TEXTURE_CREATE_HEIGHT_NUMBER, 0);
SDL_Colorspace default_colorspace;
float SDR_white_point_default = 1.0f;
float HDR_headroom_default = 1.0f;
SDL_bool texture_is_fourcc_and_target;
CHECK_RENDERER_MAGIC(renderer, NULL);
@ -1298,14 +1296,8 @@ SDL_Texture *SDL_CreateTextureWithProperties(SDL_Renderer *renderer, SDL_Propert
}
renderer->textures = texture;
if (SDL_COLORSPACETRANSFER(texture->colorspace) == SDL_TRANSFER_CHARACTERISTICS_PQ) {
SDR_white_point_default = 100.0f;
HDR_headroom_default = 4.0f;
} else if (SDL_COLORSPACETRANSFER(texture->colorspace) == SDL_TRANSFER_CHARACTERISTICS_LINEAR) {
HDR_headroom_default = 0.0f;
}
texture->SDR_white_point = SDL_GetFloatProperty(props, SDL_PROP_TEXTURE_CREATE_SDR_WHITE_POINT_FLOAT, SDR_white_point_default);
texture->HDR_headroom = SDL_GetFloatProperty(props, SDL_PROP_TEXTURE_CREATE_HDR_HEADROOM_FLOAT, HDR_headroom_default);
texture->SDR_white_point = SDL_GetFloatProperty(props, SDL_PROP_TEXTURE_CREATE_SDR_WHITE_POINT_FLOAT, SDL_GetDefaultSDRWhitePoint(texture->colorspace));
texture->HDR_headroom = SDL_GetFloatProperty(props, SDL_PROP_TEXTURE_CREATE_HDR_HEADROOM_FLOAT, SDL_GetDefaultHDRHeadroom(texture->colorspace));
/* FOURCC format cannot be used directly by renderer back-ends for target texture */
texture_is_fourcc_and_target = (access == SDL_TEXTUREACCESS_TARGET && SDL_ISPIXELFORMAT_FOURCC(format));

2
src/video/SDL_pixels_c.h
View File

@ -51,7 +51,9 @@ extern void SDL_FreeBlitMap(SDL_BlitMap *map);
extern void SDL_InvalidateAllBlitMap(SDL_Surface *surface);
/* Surface functions */
extern float SDL_GetDefaultSDRWhitePoint(SDL_Colorspace colorspace);
extern float SDL_GetSurfaceSDRWhitePoint(SDL_Surface *surface, SDL_Colorspace colorspace);
extern float SDL_GetDefaultHDRHeadroom(SDL_Colorspace colorspace);
extern float SDL_GetSurfaceHDRHeadroom(SDL_Surface *surface, SDL_Colorspace colorspace);
/* Miscellaneous functions */

14
src/video/SDL_surface.c
View File

@ -303,6 +303,11 @@ int SDL_GetSurfaceColorspace(SDL_Surface *surface, SDL_Colorspace *colorspace)
return 0;
}
float SDL_GetDefaultSDRWhitePoint(SDL_Colorspace colorspace)
{
return SDL_GetSurfaceSDRWhitePoint(NULL, colorspace);
}
float SDL_GetSurfaceSDRWhitePoint(SDL_Surface *surface, SDL_Colorspace colorspace)
{
SDL_TransferCharacteristics transfer = SDL_COLORSPACETRANSFER(colorspace);
@ -312,7 +317,7 @@ float SDL_GetSurfaceSDRWhitePoint(SDL_Surface *surface, SDL_Colorspace colorspac
SDL_PropertiesID props;
float default_value = 1.0f;
if (surface->flags & SDL_SURFACE_USES_PROPERTIES) {
if (surface && surface->flags & SDL_SURFACE_USES_PROPERTIES) {
props = SDL_GetSurfaceProperties(surface);
} else {
props = 0;
@ -326,6 +331,11 @@ float SDL_GetSurfaceSDRWhitePoint(SDL_Surface *surface, SDL_Colorspace colorspac
return 1.0f;
}
float SDL_GetDefaultHDRHeadroom(SDL_Colorspace colorspace)
{
return SDL_GetSurfaceHDRHeadroom(NULL, colorspace);
}
float SDL_GetSurfaceHDRHeadroom(SDL_Surface *surface, SDL_Colorspace colorspace)
{
SDL_TransferCharacteristics transfer = SDL_COLORSPACETRANSFER(colorspace);
@ -335,7 +345,7 @@ float SDL_GetSurfaceHDRHeadroom(SDL_Surface *surface, SDL_Colorspace colorspace)
SDL_PropertiesID props;
float default_value = 0.0f;
if (surface->flags & SDL_SURFACE_USES_PROPERTIES) {
if (surface && surface->flags & SDL_SURFACE_USES_PROPERTIES) {
props = SDL_GetSurfaceProperties(surface);
} else {
props = 0;