mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2025-09-30 06:58:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add SDL_UpdateNVTexture() to update NV12/21 Texture (bug #5430)

Browse Source 
for renderer software, opengl, and opengles2
This commit is contained in:
Sylvain Becker
2021-01-05 11:56:22 +01:00
parent d72dbd9883
commit be4cfd51c3
7 changed files with 254 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/render/SDL_yuv_sw.c
View File

@@ -299,6 +299,40 @@ SDL_SW_UpdateYUVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
return 0;
}
int SDL_SW_UpdateNVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *UVplane, int UVpitch)
{
const Uint8 *src;
Uint8 *dst;
int row;
size_t length;
/* Copy the Y plane */
src = Yplane;
dst = swdata->pixels + rect->y * swdata->w + rect->x;
length = rect->w;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += Ypitch;
dst += swdata->w;
}
/* Copy the UV or VU plane */
src = UVplane;
dst = swdata->pixels + swdata->h * swdata->w;
dst += rect->y/2 * ((swdata->w + 1)/2) + rect->x/2;
length = (rect->w + 1) / 2;
length *= 2;
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += UVpitch;
dst += 2 * ((swdata->w + 1)/2);
}
return 0;
}
int
SDL_SW_LockYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
void **pixels, int *pitch)