cfec57d898
Allocate the screen dynamically in fb_open. This opens the way to create a fb_create_screen function which takes a struct fb_info * instead of a filename. This is suitable for the framebuffer console which already has a struct fb_info *. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
328 lines
6.5 KiB
C
328 lines
6.5 KiB
C
#include <common.h>
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#include <fb.h>
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#include <gui/graphic_utils.h>
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#include <linux/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <fs.h>
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#include <malloc.h>
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/**
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* gu_get_pixel_rgb - convert a rgb triplet color to fb format
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* @info: The framebuffer info to convert the pixel for
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* @r: red component
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* @g: green component
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* @b: blue component
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* @t: transparent component
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*
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* This converts a color to the format suitable for writing directly into
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* the framebuffer.
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*
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* Return: The pixel suitable for the framebuffer
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*/
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u32 gu_rgb_to_pixel(struct fb_info *info, u8 r, u8 g, u8 b, u8 t)
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{
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u32 px;
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px = (t >> (8 - info->transp.length)) << info->transp.offset |
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(r >> (8 - info->red.length)) << info->red.offset |
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(g >> (8 - info->green.length)) << info->green.offset |
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(b >> (8 - info->blue.length)) << info->blue.offset;
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return px;
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}
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/**
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* gu_hex_to_pixel - convert a 32bit color to fb format
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* @info: The framebuffer info to convert the pixel for
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* @color: The color in 0xttrrggbb format
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*
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* This converts a color in 0xttrrggbb format to the format
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* suitable for writing directly into the framebuffer.
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*
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* Return: The pixel suitable for the framebuffer
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*/
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u32 gu_hex_to_pixel(struct fb_info *info, u32 color)
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{
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u32 px;
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u8 t = (color >> 24) & 0xff;
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u8 r = (color >> 16) & 0xff;
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u8 g = (color >> 8 ) & 0xff;
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u8 b = (color >> 0 ) & 0xff;
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if (info->grayscale) {
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px = (r | g | b) ? 0xffffffff : 0x0;
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return px;
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}
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return gu_rgb_to_pixel(info, r, g, b, t);
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}
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static void memsetw(void *s, u16 c, size_t n)
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{
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size_t i;
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u16* tmp = s;
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for (i = 0; i < n; i++)
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*tmp++ = c;
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}
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static void memsetl(void *s, u32 c, size_t n)
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{
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size_t i;
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u32* tmp = s;
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for (i = 0; i < n; i++)
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*tmp++ = c;
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}
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void gu_memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size)
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{
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u32 px;
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u8 *screen = buf;
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px = gu_hex_to_pixel(info, color);
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switch (info->bits_per_pixel) {
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case 8:
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memset(screen, (uint8_t)px, size);
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break;
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case 16:
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memsetw(screen, (uint16_t)px, size);
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break;
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case 32:
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case 24:
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memsetl(screen, px, size);
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break;
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}
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}
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static void get_rgb_pixel(struct fb_info *info, void *adr, u8 *r ,u8 *g, u8 *b)
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{
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u32 px;
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u32 rmask, gmask, bmask;
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switch (info->bits_per_pixel) {
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case 16:
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px = *(u16 *)adr;
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break;
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case 32:
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px = *(u32 *)adr;
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break;
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case 8:
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default:
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return;
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}
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rmask = (0xff >> (8 - info->blue.length)) << info->blue.offset |
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(0xff >> (8 - info->green.length)) << info->green.offset;
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gmask = (0xff >> (8 - info->red.length)) << info->red.offset |
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(0xff >> (8 - info->blue.length)) << info->blue.offset;
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bmask = (0xff >> (8 - info->red.length)) << info->red.offset |
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(0xff >> (8 - info->green.length)) << info->green.offset;
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*r = ((px & ~rmask) >> info->red.offset) << (8 - info->red.length);
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*g = ((px & ~gmask) >> info->green.offset) << (8 - info->green.length);
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*b = ((px & ~bmask) >> info->blue.offset) << (8 - info->blue.length);
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}
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void gu_set_pixel(struct fb_info *info, void *adr, u32 px)
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{
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switch (info->bits_per_pixel) {
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case 8:
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break;
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case 16:
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*(u16 *)adr = px & 0xffff;
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break;
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case 32:
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*(u32 *)adr = px;
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break;
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}
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}
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void gu_set_rgb_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b)
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{
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u32 px;
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px = (r >> (8 - info->red.length)) << info->red.offset |
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(g >> (8 - info->green.length)) << info->green.offset |
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(b >> (8 - info->blue.length)) << info->blue.offset;
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gu_set_pixel(info, adr, px);
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}
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static u8 alpha_mux(int s, int d, int a)
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{
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return (d * a + s * (255 - a)) >> 8;
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}
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void gu_invert_area(struct fb_info *info, void *buf, int startx, int starty, int width,
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int height)
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{
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unsigned char *adr;
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int x, y;
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int line_length;
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int bpp = info->bits_per_pixel >> 3;
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line_length = info->line_length;
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for (y = starty; y < starty + height; y++) {
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adr = buf + line_length * y + startx * bpp;
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for (x = 0; x < width * bpp; x++) {
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*adr++ ^= 0xff;
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}
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}
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}
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void gu_set_rgba_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b, u8 a)
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{
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u32 px = 0x0;
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if (!a)
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return;
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if (a != 0xff) {
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if (info->transp.length) {
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px |= (a >> (8 - info->transp.length)) << info->transp.offset;
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} else {
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u8 sr = 0;
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u8 sg = 0;
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u8 sb = 0;
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get_rgb_pixel(info, adr, &sr, &sg, &sb);
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r = alpha_mux(sr, r, a);
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g = alpha_mux(sg, g, a);
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b = alpha_mux(sb, b, a);
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gu_set_rgb_pixel(info, adr, r, g, b);
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return;
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}
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}
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px |= (r >> (8 - info->red.length)) << info->red.offset |
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(g >> (8 - info->green.length)) << info->green.offset |
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(b >> (8 - info->blue.length)) << info->blue.offset;
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gu_set_pixel(info, adr, px);
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}
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void gu_rgba_blend(struct fb_info *info, struct image *img, void* buf, int height,
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int width, int startx, int starty, bool is_rgba)
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{
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unsigned char *adr;
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int x, y;
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int line_length;
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int img_byte_per_pixel = 3;
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void *image;
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if (is_rgba)
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img_byte_per_pixel++;
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line_length = info->line_length;
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for (y = 0; y < height; y++) {
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adr = buf + (y + starty) * line_length +
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startx * (info->bits_per_pixel >> 3);
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image = img->data + (y * img->width *img_byte_per_pixel);
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for (x = 0; x < width; x++) {
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uint8_t *pixel = image;
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if (is_rgba)
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gu_set_rgba_pixel(info, adr, pixel[0], pixel[1],
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pixel[2], pixel[3]);
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else
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gu_set_rgb_pixel(info, adr, pixel[0], pixel[1],
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pixel[2]);
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adr += info->bits_per_pixel >> 3;
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image += img_byte_per_pixel;
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}
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}
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}
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struct screen *fb_create_screen(struct fb_info *info, bool offscreen)
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{
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struct screen *sc;
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sc = xzalloc(sizeof(*sc));
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sc->s.x = 0;
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sc->s.y = 0;
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sc->s.width = info->xres;
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sc->s.height = info->yres;
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sc->fbsize = info->line_length * sc->s.height;
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sc->fb = info->screen_base;
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if (offscreen) {
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/*
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* Don't fail if malloc fails, just continue rendering directly
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* on the framebuffer
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*/
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sc->offscreenbuf = malloc(sc->fbsize);
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}
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return sc;
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}
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struct screen *fb_open(const char * fbdev, bool offscreen)
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{
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int fd, ret;
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struct fb_info *info;
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struct screen *sc;
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fd = open(fbdev, O_RDWR);
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if (fd < 0)
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return ERR_PTR(fd);
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info = xzalloc(sizeof(*info));
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ret = ioctl(fd, FBIOGET_SCREENINFO, info);
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if (ret) {
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goto failed_screeninfo;
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}
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sc = fb_create_screen(info, offscreen);
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if (IS_ERR(sc)) {
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ret = PTR_ERR(sc);
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goto failed_create;
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}
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sc->fd = fd;
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sc->info = info;
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return sc;
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failed_create:
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free(sc->offscreenbuf);
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free(sc);
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failed_screeninfo:
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close(fd);
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return ERR_PTR(ret);
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}
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void fb_close(struct screen *sc)
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{
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free(sc->offscreenbuf);
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if (sc->fd > 0) {
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close(sc->fd);
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free(sc->info);
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}
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free(sc);
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}
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void gu_screen_blit(struct screen *sc)
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{
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if (!sc->offscreenbuf)
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return;
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memcpy(sc->fb, sc->offscreenbuf, sc->fbsize);
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}
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