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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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41
src/render/opengl/SDL_render_gl.c
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@ -52,6 +52,11 @@ static int GL_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
static int GL_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch);
static int GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch);
static void GL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
@ -403,6 +408,7 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->GetOutputSize = GL_GetOutputSize;
renderer->CreateTexture = GL_CreateTexture;
renderer->UpdateTexture = GL_UpdateTexture;
renderer->UpdateTextureYUV = GL_UpdateTextureYUV;
renderer->LockTexture = GL_LockTexture;
renderer->UnlockTexture = GL_UnlockTexture;
renderer->SetRenderTarget = GL_SetRenderTarget;
@ -801,6 +807,41 @@ GL_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
return GL_CheckError("glTexSubImage2D()", renderer);
}
static int
GL_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch)
{
GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
GL_TextureData *data = (GL_TextureData *) texture->driverdata;
GL_ActivateRenderer(renderer);
renderdata->glEnable(data->type);
renderdata->glBindTexture(data->type, data->texture);
renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Ypitch);
renderdata->glTexSubImage2D(data->type, 0, rect->x, rect->y, rect->w,
rect->h, data->format, data->formattype,
Yplane);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Upitch);
renderdata->glBindTexture(data->type, data->utexture);
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, Uplane);
renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Vpitch);
renderdata->glBindTexture(data->type, data->vtexture);
renderdata->glTexSubImage2D(data->type, 0, rect->x/2, rect->y/2,
rect->w/2, rect->h/2,
data->format, data->formattype, Vplane);
renderdata->glDisable(data->type);
return GL_CheckError("glTexSubImage2D()", renderer);
}
static int
GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch)