diff options
Diffstat (limited to 'lib/gui/graphic_utils.c')
| -rw-r--r-- | lib/gui/graphic_utils.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/lib/gui/graphic_utils.c b/lib/gui/graphic_utils.c new file mode 100644 index 000000000..bf42103b4 --- /dev/null +++ b/lib/gui/graphic_utils.c @@ -0,0 +1,191 @@ +#include <common.h> +#include <fb.h> +#include <gui/graphic_utils.h> + +static u32 get_pixel(struct fb_info *info, u32 color) +{ + u32 px; + u8 t = (color >> 24) & 0xff; + u8 r = (color >> 16) & 0xff; + u8 g = (color >> 8 ) & 0xff; + u8 b = (color >> 0 ) & 0xff; + + if (info->grayscale) { + px = (r | g | b) ? 0xffffffff : 0x0; + return px; + } + + px = (t >> (8 - info->transp.length)) << info->transp.offset | + (r >> (8 - info->red.length)) << info->red.offset | + (g >> (8 - info->green.length)) << info->green.offset | + (b >> (8 - info->blue.length)) << info->blue.offset; + + return px; +} + +static void memsetw(void *s, u16 c, size_t n) +{ + size_t i; + u16* tmp = s; + + for (i = 0; i < n; i++) + *tmp++ = c; +} + +static void memsetl(void *s, u32 c, size_t n) +{ + size_t i; + u32* tmp = s; + + for (i = 0; i < n; i++) + *tmp++ = c; +} + +void memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size) +{ + u32 px; + u8 *screen = buf; + + px = get_pixel(info, color); + + switch (info->bits_per_pixel) { + case 8: + memset(screen, (uint8_t)px, size); + break; + case 16: + memsetw(screen, (uint16_t)px, size); + break; + case 32: + case 24: + memsetl(screen, px, size); + break; + } +} + +static void get_rgb_pixel(struct fb_info *info, void *adr, u8 *r ,u8 *g, u8 *b) +{ + u32 px; + u32 rmask, gmask, bmask; + + switch (info->bits_per_pixel) { + case 16: + px = *(u16 *)adr; + break; + case 32: + px = *(u32 *)adr; + break; + case 8: + default: + return; + } + + rmask = (0xff >> (8 - info->blue.length)) << info->blue.offset | + (0xff >> (8 - info->green.length)) << info->green.offset; + + gmask = (0xff >> (8 - info->red.length)) << info->red.offset | + (0xff >> (8 - info->blue.length)) << info->blue.offset; + + bmask = (0xff >> (8 - info->red.length)) << info->red.offset | + (0xff >> (8 - info->green.length)) << info->green.offset; + + *r = ((px & ~rmask) >> info->red.offset) << (8 - info->red.length); + *g = ((px & ~gmask) >> info->green.offset) << (8 - info->green.length); + *b = ((px & ~bmask) >> info->blue.offset) << (8 - info->blue.length); +} + +void set_pixel(struct fb_info *info, void *adr, u32 px) +{ + switch (info->bits_per_pixel) { + case 8: + break; + case 16: + *(u16 *)adr = px; + break; + case 32: + *(u32 *)adr = px; + break; + } +} + +void set_rgb_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b) +{ + u32 px; + + px = (r >> (8 - info->red.length)) << info->red.offset | + (g >> (8 - info->green.length)) << info->green.offset | + (b >> (8 - info->blue.length)) << info->blue.offset; + + set_pixel(info, adr, px); +} + +static u8 alpha_mux(int s, int d, int a) +{ + return (d * a + s * (255 - a)) >> 8; +} + +void set_rgba_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b, u8 a) +{ + u32 px = 0x0; + + if (!a) + return; + + if (a != 0xff) { + if (info->transp.length) { + px |= (a >> (8 - info->transp.length)) << info->transp.offset; + } else { + u8 sr = 0; + u8 sg = 0; + u8 sb = 0; + + get_rgb_pixel(info, adr, &sr, &sg, &sb); + + r = alpha_mux(sr, r, a); + g = alpha_mux(sg, g, a); + b = alpha_mux(sb, b, a); + + set_rgb_pixel(info, adr, r, g, b); + + return; + } + } + + px |= (r >> (8 - info->red.length)) << info->red.offset | + (g >> (8 - info->green.length)) << info->green.offset | + (b >> (8 - info->blue.length)) << info->blue.offset; + + set_pixel(info, adr, px); +} + +void rgba_blend(struct fb_info *info, void *image, void* buf, int height, + int width, int startx, int starty, bool is_rgba) +{ + unsigned char *adr; + int x, y; + int xres; + int img_byte_per_pixel = 3; + + if (is_rgba) + img_byte_per_pixel++; + + xres = info->xres; + + for (y = 0; y < height; y++) { + adr = buf + ((y + starty) * xres + startx) * + (info->bits_per_pixel >> 3); + + for (x = 0; x < width; x++) { + char *pixel; + + pixel = image; + if (is_rgba) + set_rgba_pixel(info, adr, pixel[0], pixel[1], + pixel[2], pixel[3]); + else + set_rgb_pixel(info, adr, pixel[0], pixel[1], + pixel[2]); + adr += info->bits_per_pixel >> 3; + image += img_byte_per_pixel; + } + } +} |