pandory500/SDL-mirror
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You don't need to copy the pixels into the streaming texture's pixel data. This behavior is defined specifically to optimize the UpdateTexture path.

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This commit is contained in:
Sam Lantinga 2011-02-06 20:56:21 -08:00
parent 1c8816f6fe
commit 87ca0acb3f
2 changed files with 3 additions and 25 deletions
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26
src/render/opengles2/SDL_render_gles2.c
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@ -389,35 +389,13 @@ GLES2_UpdateTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect
tdata->pixel_format,
tdata->pixel_type,
src);
SDL_free(blob);
if (glGetError() != GL_NO_ERROR)
{
SDL_SetError("Failed to update texture");
return -1;
}
/* Update the (streaming) texture buffer, in one pass if possible */
if (tdata->pixel_data)
{
dest = (Uint8 *)tdata->pixel_data +
(tdata->pitch * rect->y) +
(SDL_BYTESPERPIXEL(texture->format) * rect->x);
if (rect->w == texture->w)
{
SDL_memcpy(dest, src, srcPitch * rect->h);
}
else
{
for (y = 0; y < rect->h; ++y)
{
SDL_memcpy(dest, src, srcPitch);
src += srcPitch;
dest += tdata->pitch;
}
}
}
/* Clean up and return */
SDL_free(blob);
return 0;
}