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Added optimized YUV texture upload path with SDL_UpdateYUVTexture()

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This commit is contained in:
Sam Lantinga 2013-09-28 14:06:47 -07:00
parent 45bd5e2b83
commit 43cc5c1cbb
6 changed files with 229 additions and 0 deletions
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100
src/render/SDL_render.c
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@ -804,6 +804,106 @@ SDL_UpdateTexture(SDL_Texture * texture, const SDL_Rect * rect,
}
}
static int
SDL_UpdateTextureYUVPlanar(SDL_Texture * texture, const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch)
{
SDL_Texture *native = texture->native;
SDL_Rect full_rect;
if (SDL_SW_UpdateYUVTexturePlanar(texture->yuv, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch) < 0) {
return -1;
}
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
/* We can lock the texture and copy to it */
void *native_pixels;
int native_pitch;
if (SDL_LockTexture(native, rect, &native_pixels, &native_pitch) < 0) {
return -1;
}
SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
rect->w, rect->h, native_pixels, native_pitch);
SDL_UnlockTexture(native);
} else {
/* Use a temporary buffer for updating */
void *temp_pixels;
int temp_pitch;
temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3);
temp_pixels = SDL_malloc(rect->h * temp_pitch);
if (!temp_pixels) {
return SDL_OutOfMemory();
}
SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
rect->w, rect->h, temp_pixels, temp_pitch);
SDL_UpdateTexture(native, rect, temp_pixels, temp_pitch);
SDL_free(temp_pixels);
}
return 0;
}
int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch)
{
SDL_Renderer *renderer;
SDL_Rect full_rect;
CHECK_TEXTURE_MAGIC(texture, -1);
if (!Yplane) {
return SDL_InvalidParamError("Yplane");
}
if (!Ypitch) {
return SDL_InvalidParamError("Ypitch");
}
if (!Uplane) {
return SDL_InvalidParamError("Uplane");
}
if (!Upitch) {
return SDL_InvalidParamError("Upitch");
}
if (!Vplane) {
return SDL_InvalidParamError("Vplane");
}
if (!Vpitch) {
return SDL_InvalidParamError("Vpitch");
}
if (texture->format != SDL_PIXELFORMAT_YV12 &&
texture->format != SDL_PIXELFORMAT_IYUV) {
return SDL_SetError("Texture format must by YV12 or IYUV");
}
if (!rect) {
full_rect.x = 0;
full_rect.y = 0;
full_rect.w = texture->w;
full_rect.h = texture->h;
rect = &full_rect;
}
if (texture->yuv) {
return SDL_UpdateTextureYUVPlanar(texture, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch);
} else {
SDL_assert(!texture->native);
renderer = texture->renderer;
SDL_assert(renderer->UpdateTextureYUV);
return renderer->UpdateTextureYUV(renderer, texture, rect, Yplane, Ypitch, Uplane, Upitch, Vplane, Vpitch);
}
}
static int
SDL_LockTextureYUV(SDL_Texture * texture, const SDL_Rect * rect,
void **pixels, int *pitch)