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Don't crash if SDL_MapRGB() and SDL_MapRGBA() are passed a NULL format

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(cherry picked from commit fadc4916a9bcc410c2148a91bf0adf742410a4ba)
This commit is contained in:
Sam Lantinga 2023-06-27 16:07:56 -07:00
parent 170428b107
commit 0ba93e4aac
1 changed files with 8 additions and 0 deletions
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8
src/video/SDL_pixels.c
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@ -852,6 +852,10 @@ void SDL_DetectPalette(SDL_Palette *pal, SDL_bool *is_opaque, SDL_bool *has_alph
/* Find the opaque pixel value corresponding to an RGB triple */ /* Find the opaque pixel value corresponding to an RGB triple */
Uint32 SDL_MapRGB(const SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b) Uint32 SDL_MapRGB(const SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b)
{ {
if (!format) {
SDL_InvalidParamError("format");
return 0;
}
if (format->palette == NULL) { if (format->palette == NULL) {
return (r >> format->Rloss) << format->Rshift | (g >> format->Gloss) << format->Gshift | (b >> format->Bloss) << format->Bshift | format->Amask; return (r >> format->Rloss) << format->Rshift | (g >> format->Gloss) << format->Gshift | (b >> format->Bloss) << format->Bshift | format->Amask;
} else { } else {
@ -862,6 +866,10 @@ Uint32 SDL_MapRGB(const SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b)
/* Find the pixel value corresponding to an RGBA quadruple */ /* Find the pixel value corresponding to an RGBA quadruple */
Uint32 SDL_MapRGBA(const SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b, Uint8 a) Uint32 SDL_MapRGBA(const SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
{ {
if (!format) {
SDL_InvalidParamError("format");
return 0;
}
if (format->palette == NULL) { if (format->palette == NULL) {
return (r >> format->Rloss) << format->Rshift | (g >> format->Gloss) << format->Gshift | (b >> format->Bloss) << format->Bshift | ((Uint32)(a >> format->Aloss) << format->Ashift & format->Amask); return (r >> format->Rloss) << format->Rshift | (g >> format->Gloss) << format->Gshift | (b >> format->Bloss) << format->Bshift | ((Uint32)(a >> format->Aloss) << format->Ashift & format->Amask);
} else { } else {