[virglrenderer-devel] [PATCH] vrend: fix glTexParameteri call

[Jakob Bornecrantz]

On 2018-02-27 02:22, Gurchetan Singh wrote:
> When emulating GL_ALPHA8 with GL_R8, we should make the alpha
> component equal to the red color channel.
> 
> Fixes:
> ['dEQP-GLES2.functional.texture.mipmap.2d.generate.a8_fastest']
> ['dEQP-GLES2.functional.texture.mipmap.2d.generate.a8_nicest']
> 
> on OpenGL 4.5 (core).

Tested-by: Jakob Bornecrantz <jakob at collabora.com>

> ---
>   src/vrend_blitter.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/src/vrend_blitter.c b/src/vrend_blitter.c
> index 908a82d..ebd76ac 100644
> --- a/src/vrend_blitter.c
> +++ b/src/vrend_blitter.c
> @@ -616,7 +616,7 @@ void vrend_renderer_blit_gl(struct vrend_context *ctx,
>      glBindTexture(src_res->target, src_res->id);
>   
>      if (vrend_format_is_emulated_alpha(info->src.format))
> -      glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_R, GL_ALPHA);
> +      glTexParameteri(src_res->target, GL_TEXTURE_SWIZZLE_A, GL_RED);
>   
>      glTexParameteri(src_res->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
>      glTexParameteri(src_res->target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
>