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Added support for SDL_PIXELFORMAT_INDEX8 to SDL_BlitTriangle_Slow()

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Fixes https://github.com/libsdl-org/SDL/issues/14419
This commit is contained in:
Sam Lantinga
2025-11-07 11:00:55 -08:00
parent 547b2a2e37
commit 0f21e46586
1 changed files with 13 additions and 2 deletions
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15
src/render/software/SDL_triangle.c
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@@ -743,12 +743,16 @@ end:
#define FORMAT_ALPHA 0
#define FORMAT_NO_ALPHA -1
#define FORMAT_INDEX8 -2
#define FORMAT_2101010 1
#define FORMAT_INDEXED(format) format == FORMAT_INDEX8
#define FORMAT_HAS_ALPHA(format) format == 0
#define FORMAT_HAS_NO_ALPHA(format) format < 0
static int detect_format(const SDL_PixelFormatDetails *pf)
{
if (pf->format == SDL_PIXELFORMAT_ARGB2101010) {
if (SDL_ISPIXELFORMAT_INDEXED(pf->format)) {
return FORMAT_INDEX8;
} if (pf->format == SDL_PIXELFORMAT_ARGB2101010) {
return FORMAT_2101010;
} else if (pf->Amask) {
return FORMAT_ALPHA;
@@ -766,6 +770,7 @@ static void SDL_BlitTriangle_Slow(SDL_BlitInfo *info,
SDL_TextureAddressMode texture_address_mode_v)
{
SDL_Surface *src_surface = info->src_surface;
SDL_Palette *palette = src_surface->palette;
const int flags = info->flags;
Uint32 modulateR = info->r;
Uint32 modulateG = info->g;
@@ -796,7 +801,13 @@ static void SDL_BlitTriangle_Slow(SDL_BlitInfo *info,
Uint8 *dst = dptr;
TRIANGLE_GET_TEXTCOORD
src = (info->src + (srcy * info->src_pitch) + (srcx * srcbpp));
if (FORMAT_HAS_ALPHA(srcfmt_val)) {
if (FORMAT_INDEXED(srcfmt_val)) {
const SDL_Color *color = &palette->colors[*src];
srcR = color->r;
srcG = color->g;
srcB = color->b;
srcA = color->a;
} else if (FORMAT_HAS_ALPHA(srcfmt_val)) {
DISEMBLE_RGBA(src, srcbpp, src_fmt, srcpixel, srcR, srcG, srcB, srcA);
} else if (FORMAT_HAS_NO_ALPHA(srcfmt_val)) {
DISEMBLE_RGB(src, srcbpp, src_fmt, srcpixel, srcR, srcG, srcB);