sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

libpayload: cbgfx: Add color mapping functionality

Browse Source 
Similar to set_blend(), add set_color_map() for mapping background and
foreground colors of a bitmap. Also add clear_color_map() for clearing
the saved color mappings.

Note that when drawing a bitmap, the color mapping will be applied
before blending.

Also remove unnecessary initialization for static variable 'blend'.

BRANCH=puff
BUG=b:146399181, b:162357639
TEST=emerge-puff libpayload

Change-Id: I640ff3e8455cd4aaa5a41d03a0183dff282648a5
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44375
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Joel Kitching <kitching@google.com>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Yu-Ping Wu
2020-08-03 12:32:43 +08:00
committed by Julius Werner
parent e7ef6c380d
commit 7b54c15a67
2 changed files with 75 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

66
payloads/libpayload/drivers/video/graphics.c
View File

@@ -61,17 +61,53 @@ static const struct vector vzero = {
.y = 0,
};
struct color_transformation {
uint8_t base;
int16_t scale;
};
struct color_mapping {
struct color_transformation red;
struct color_transformation green;
struct color_transformation blue;
int enabled;
};
static struct color_mapping color_map;
static inline void set_color_trans(struct color_transformation *trans,
uint8_t bg_color, uint8_t fg_color)
{
trans->base = bg_color;
trans->scale = fg_color - bg_color;
}
int set_color_map(const struct rgb_color *background,
const struct rgb_color *foreground)
{
if (background == NULL || foreground == NULL)
return CBGFX_ERROR_INVALID_PARAMETER;
set_color_trans(&color_map.red, background->red, foreground->red);
set_color_trans(&color_map.green, background->green,
foreground->green);
set_color_trans(&color_map.blue, background->blue, foreground->blue);
color_map.enabled = 1;
return CBGFX_SUCCESS;
}
void clear_color_map(void)
{
color_map.enabled = 0;
}
struct blend_value {
uint8_t alpha;
struct rgb_color rgb;
};
static struct blend_value blend = {
.alpha = 0,
.rgb.red = 0,
.rgb.green = 0,
.rgb.blue = 0,
};
static struct blend_value blend;
int set_blend(const struct rgb_color *rgb, uint8_t alpha)
{
@@ -185,6 +221,15 @@ static int within_box(const struct vector *v, const struct rect *bound)
return -1;
}
/* Helper function that applies color_map to the color. */
static inline uint8_t apply_map(uint8_t color,
const struct color_transformation *trans)
{
if (!color_map.enabled)
return color;
return trans->base + trans->scale * color / UINT8_MAX;
}
/*
* Helper function that applies color and opacity from blend struct
* into the color.
@@ -203,13 +248,16 @@ static inline uint32_t calculate_color(const struct rgb_color *rgb,
{
uint32_t color = 0;
color |= (apply_blend(rgb->red, blend.rgb.red)
color |= (apply_blend(apply_map(rgb->red, &color_map.red),
blend.rgb.red)
>> (8 - fbinfo->red_mask_size))
<< fbinfo->red_mask_pos;
color |= (apply_blend(rgb->green, blend.rgb.green)
color |= (apply_blend(apply_map(rgb->green, &color_map.green),
blend.rgb.green)
>> (8 - fbinfo->green_mask_size))
<< fbinfo->green_mask_pos;
color |= (apply_blend(rgb->blue, blend.rgb.blue)
color |= (apply_blend(apply_map(rgb->blue, &color_map.blue),
blend.rgb.blue)
>> (8 - fbinfo->blue_mask_size))
<< fbinfo->blue_mask_pos;
if (invert)