diff options
Diffstat (limited to 'exynos/exynos_fimg2d.c')
| -rw-r--r-- | exynos/exynos_fimg2d.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/exynos/exynos_fimg2d.c b/exynos/exynos_fimg2d.c index ce1ba1ef..9c66c3ab 100644 --- a/exynos/exynos_fimg2d.c +++ b/exynos/exynos_fimg2d.c @@ -41,6 +41,18 @@ #define MIN(a, b) ((a) < (b) ? (a) : (b)) +static unsigned int g2d_get_scaling(unsigned int src, unsigned int dst) +{ + /* + * The G2D hw scaling factor is a normalized inverse of the scaling factor. + * For example: When source width is 100 and destination width is 200 + * (scaling of 2x), then the hw factor is NC * 100 / 200. + * The normalization factor (NC) is 2^16 = 0x10000. + */ + + return ((src << 16) / dst); +} + static unsigned int g2d_get_blend_op(enum e_g2d_op op) { union g2d_blend_func_val val; @@ -428,7 +440,7 @@ g2d_copy_with_scale(struct g2d_context *ctx, struct g2d_image *src, union g2d_rop4_val rop4; union g2d_point_val pt; unsigned int scale; - double scale_x = 0.0f, scale_y = 0.0f; + unsigned int scale_x, scale_y; g2d_add_cmd(ctx, DST_SELECT_REG, G2D_SELECT_MODE_BGCOLOR); g2d_add_cmd(ctx, DST_COLOR_MODE_REG, dst->color_mode); @@ -454,8 +466,8 @@ g2d_copy_with_scale(struct g2d_context *ctx, struct g2d_image *src, scale = 0; else { scale = 1; - scale_x = (double)src_w / (double)dst_w; - scale_y = (double)src_h / (double)dst_h; + 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) @@ -487,8 +499,8 @@ g2d_copy_with_scale(struct g2d_context *ctx, struct g2d_image *src, if (scale) { g2d_add_cmd(ctx, SRC_SCALE_CTRL_REG, G2D_SCALE_MODE_BILINEAR); - g2d_add_cmd(ctx, SRC_XSCALE_REG, G2D_DOUBLE_TO_FIXED(scale_x)); - g2d_add_cmd(ctx, SRC_YSCALE_REG, G2D_DOUBLE_TO_FIXED(scale_y)); + g2d_add_cmd(ctx, SRC_XSCALE_REG, scale_x); + g2d_add_cmd(ctx, SRC_YSCALE_REG, scale_y); } pt.val = 0; |