Re: [PATCH 09/14] exynos/fimg2d: check buffer space in g2d_scale_and_blend()

[Inki Dae <inki.dae@samsung.com>]

On 2015년 08월 24일 23:14, Tobias Jakobi wrote:
> Apply the same transformation as in g2d_blend().
> 
> Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
> ---
>  exynos/exynos_fimg2d.c | 67 +++++++++++++++++++++++++++++---------------------
>  1 file changed, 39 insertions(+), 28 deletions(-)
> 
> diff --git a/exynos/exynos_fimg2d.c b/exynos/exynos_fimg2d.c
> index 5acccf8..4274a94 100644
> --- a/exynos/exynos_fimg2d.c
> +++ b/exynos/exynos_fimg2d.c
> @@ -745,9 +745,47 @@ g2d_scale_and_blend(struct g2d_context *ctx, struct g2d_image *src,
>  	union g2d_point_val pt;
>  	union g2d_bitblt_cmd_val bitblt;
>  	union g2d_blend_func_val blend;
> -	unsigned int scale;
> +	unsigned int scale, gem_space;
>  	unsigned int scale_x, scale_y;
>  
> +	if (src_w == dst_w && src_h == dst_h)
> +		scale = 0;
> +	else {
> +		scale = 1;
> +		scale_x = g2d_get_scaling(src_w, dst_w);
> +		scale_y = g2d_get_scaling(src_h, dst_h);
> +	}
> +
> +	if (src_x + src_w > src->width)
> +		src_w = src->width - src_x;
> +	if (src_y + src_h > src->height)
> +		src_h = src->height - src_y;
> +
> +	if (dst_x + dst_w > dst->width)
> +		dst_w = dst->width - dst_x;
> +	if (dst_y + dst_h > dst->height)
> +		dst_h = dst->height - dst_y;
> +
> +	if (src_w <= 0 || src_h <= 0 || dst_w <= 0 || dst_h <= 0) {
> +		fprintf(stderr, "invalid width or height.\n");
> +		return -EINVAL;
> +	}
> +
> +	if (g2d_validate_select_mode(src->select_mode)) {
> +		fprintf(stderr , "invalid select mode for source.\n");
> +		return -EINVAL;
> +	}
> +
> +	if (g2d_validate_blending_op(op)) {
> +		fprintf(stderr , "unsupported blending operation.\n");
> +		return -EINVAL;
> +	}
> +
> +	gem_space = src->select_mode == G2D_SELECT_MODE_NORMAL ? 2 : 1;
> +
> +	if (g2d_check_space(ctx, 12 + scale * 3, gem_space))
> +		return -ENOSPC;

Ditto.

Thanks,
Inki Dae

> +
>  	bitblt.val = 0;
>  	blend.val = 0;
>  
> @@ -774,33 +812,6 @@ g2d_scale_and_blend(struct g2d_context *ctx, struct g2d_image *src,
>  	case G2D_SELECT_MODE_BGCOLOR:
>  		g2d_add_cmd(ctx, BG_COLOR_REG, src->color);
>  		break;
> -	default:
> -		fprintf(stderr , "failed to set src.\n");
> -		return -EINVAL;
> -	}
> -
> -	if (src_w == dst_w && src_h == dst_h)
> -		scale = 0;
> -	else {
> -		scale = 1;
> -		scale_x = g2d_get_scaling(src_w, dst_w);
> -		scale_y = g2d_get_scaling(src_h, dst_h);
> -	}
> -
> -	if (src_x + src_w > src->width)
> -		src_w = src->width - src_x;
> -	if (src_y + src_h > src->height)
> -		src_h = src->height - src_y;
> -
> -	if (dst_x + dst_w > dst->width)
> -		dst_w = dst->width - dst_x;
> -	if (dst_y + dst_h > dst->height)
> -		dst_h = dst->height - dst_y;
> -
> -	if (src_w <= 0 || src_h <= 0 || dst_w <= 0 || dst_h <= 0) {
> -		fprintf(stderr, "invalid width or height.\n");
> -		g2d_reset(ctx);
> -		return -EINVAL;
>  	}
>  
>  	if (scale) {
>