diff options
Diffstat (limited to 'w3mimg/fb/fb.c')
| -rw-r--r-- | w3mimg/fb/fb.c | 203 |
1 files changed, 145 insertions, 58 deletions
diff --git a/w3mimg/fb/fb.c b/w3mimg/fb/fb.c index fc2e19b..526441a 100644 --- a/w3mimg/fb/fb.c +++ b/w3mimg/fb/fb.c @@ -1,6 +1,6 @@ -/* $Id: fb.c,v 1.3 2002/07/18 15:10:52 ukai Exp $ */ +/* $Id: fb.c,v 1.4 2002/07/22 16:17:32 ukai Exp $ */ /************************************************************************** - fb.c 0.2 Copyright (C) 2002, hito + fb.c 0.3 Copyright (C) 2002, hito **************************************************************************/ #include <stdio.h> @@ -21,6 +21,8 @@ #define FALSE 0 #define TRUE 1 +#define IMAGE_SIZE_MAX 10000 + static struct fb_cmap *fb_cmap_create(struct fb_fix_screeninfo *, struct fb_var_screeninfo *); static void fb_cmap_destroy(struct fb_cmap *cmap); @@ -34,6 +36,7 @@ static struct fb_var_screeninfo vscinfo; static struct fb_cmap *cmap = NULL; static int is_open = FALSE; static int fbfp = -1; +static size_t pixel_size = 0; static unsigned char *buf = NULL; int @@ -75,51 +78,6 @@ fb_open(void) goto ERR_END; } -#if 0 - if (fscinfo.visual == FB_VISUAL_PSEUDOCOLOR) { - printf("FB_VISUAL_PSEUDOCOLOR\n"); - if (vscinfo.bits_per_pixel != 8) { - fprintf(stderr, "未対応フレームバッファ\n"); - goto ERR_END; - } - - if (fb_cmap_get(fbfp, cmap)) { - fprintf(stderr, "カラーマップ獲得失敗\n"); - // fb_cmap_destroy(cmap); - goto ERR_END; - } - // fb_cmap_disp(cmap); - - if (cmap->len < (LINUX_LOGO_COLORS + LOGO_COLOR_OFFSET)) { - fprintf(stderr, "色の割付領域が不足しています\n"); - goto ERR_END; - } - - cmap->start = LOGO_COLOR_OFFSET; - cmap->len = LINUX_LOGO_COLORS; - - for (lp = 0; lp < LINUX_LOGO_COLORS; lp++) { - if (cmap->red) { - *(cmap->red + lp) = - (linux_logo_red[lp] << CHAR_BIT) + linux_logo_red[lp]; - } - if (cmap->green) { - *(cmap->green + lp) = - (linux_logo_green[lp] << CHAR_BIT) + linux_logo_green[lp]; - } - if (cmap->blue) { - *(cmap->blue + lp) = - (linux_logo_blue[lp] << CHAR_BIT) + linux_logo_blue[lp]; - } - } - if (fb_cmap_set(fbfp, cmap)) { - fb_cmap_destroy(cmap); - fprintf(stderr, "カラーマップ獲得失敗\n"); - goto ERR_END; - } - } -#endif - if (!(fscinfo.visual == FB_VISUAL_TRUECOLOR && (vscinfo.bits_per_pixel == 15 || vscinfo.bits_per_pixel == 16 || @@ -128,6 +86,8 @@ fb_open(void) goto ERR_END; } + pixel_size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT; + is_open = TRUE; return 0; @@ -158,20 +118,150 @@ fb_close(void) is_open = FALSE; } +FB_IMAGE * +fb_image_new(int width, int height) +{ + FB_IMAGE *image; + + if (is_open != TRUE) + return NULL; + + if (width > IMAGE_SIZE_MAX || height > IMAGE_SIZE_MAX) + return NULL; + + image = malloc(sizeof(*image)); + if (image == NULL) + return NULL; + + image->data = malloc(width * height * pixel_size); + if (image->data == NULL) { + free(image); + return NULL; + } + + image->width = width; + image->height = height; + image->rowstride = width * pixel_size; + image->len = width * height * pixel_size; + + return image; +} + +void +fb_image_free(FB_IMAGE * image) +{ + if (image == NULL) + return; + + if (image->data != NULL) + free(image->data); + + free(image); +} + +void +fb_image_pset(FB_IMAGE * image, int x, int y, int r, int g, int b) +{ + unsigned long work; + int offset; + + if (image == NULL || is_open != TRUE || x >= image->width + || y >= image->height) + return; + + offset = image->rowstride * y + pixel_size * x; + + work = ((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red. + offset) + + ((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green. + offset) + + ((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset); + + memcpy(image->data + offset, &work, pixel_size); +} + +int +fb_image_draw(FB_IMAGE * image, int x, int y, int sx, int sy, int width, + int height) +{ + int i, offset_fb, offset_img; + + if (image == NULL || is_open != TRUE || + sx > image->width || sy > image->height || + x > fb_width() || y > fb_height()) + return 1; + + if (x + width > fb_width()) + width = fb_width() - x; + + if (y + height > fb_height()) + height = fb_height() - y; + + offset_fb = fscinfo.line_length * y + pixel_size * x; + offset_img = image->rowstride * sy + pixel_size * sx; + for (i = 0; i < height; i++) { + memcpy(buf + offset_fb, image->data + offset_img, pixel_size * width); + offset_fb += fscinfo.line_length; + offset_img += image->rowstride; + } + + return 0; +} + +void +fb_image_rotete(FB_IMAGE * image, int direction) +{ + unsigned char *src, *dest, *tmp; + int x, y, i, ofst; + + if (image == NULL) + return; + + tmp = malloc(image->len); + if (tmp == NULL) + return; + + src = image->data; + dest = tmp; + + if (direction) { + int ofst2 = image->rowstride * (image->height - 1); + for (x = 0; x < image->rowstride; x += pixel_size) { + ofst = ofst2 + x; + for (y = image->height - 1; y >= 0; y--) { + memcpy(dest, src + ofst, pixel_size); + dest += pixel_size; + ofst -= image->rowstride; + } + } + } else { + for (x = image->rowstride - pixel_size; x >= 0; x -= pixel_size) { + ofst = x; + for (y = 0; y < image->height; y++) { + memcpy(dest, src + ofst, pixel_size); + dest += pixel_size; + ofst += image->rowstride; + } + } + } + memcpy(src, tmp, image->len); + i = image->width; + image->width = image->height; + image->height = i; + image->rowstride = image->width * pixel_size; + free(tmp); +} + void fb_pset(int x, int y, int r, int g, int b) { unsigned long work; int offset; - static size_t size = 0; if (is_open != TRUE || x >= vscinfo.xres || y >= vscinfo.yres) return; - if (size == 0) - size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT; - - offset = fscinfo.line_length * y + size * x; + offset = fscinfo.line_length * y + pixel_size * x; if (offset >= fscinfo.smem_len) return; @@ -180,7 +270,7 @@ fb_pset(int x, int y, int r, int g, int b) ((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) + ((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.offset) + ((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset); - memcpy(buf + offset, &work, size); + memcpy(buf + offset, &work, pixel_size); } int @@ -188,19 +278,16 @@ fb_get_color(int x, int y, int *r, int *g, int *b) { unsigned long work = 0; int offset; - static size_t size = 0; if (is_open != TRUE || x >= vscinfo.xres || y >= vscinfo.yres) return 1; - if (size == 0) - size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT; + offset = fscinfo.line_length * y + pixel_size * x; - offset = fscinfo.line_length * y + size * x; if (offset >= fscinfo.smem_len) return 1; - memcpy(&work, buf + offset, size); + memcpy(&work, buf + offset, pixel_size); *r = ((work >> vscinfo.red. offset) & (0x000000ff >> (CHAR_BIT - vscinfo.red.length))) |