Adding upstream version 0.5.1
This commit is contained in:
Tatsuya Kinoshita
663
w3mimg/fb/fb.c
Normal file
663
w3mimg/fb/fb.c
Normal file
@@ -0,0 +1,663 @@
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/* $Id: fb.c,v 1.16 2003/07/13 16:19:10 ukai Exp $ */
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/**************************************************************************
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fb.c 0.3 Copyright (C) 2002, hito
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**************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <linux/fb.h>
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#include "fb.h"
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#define FB_ENV "FRAMEBUFFER"
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#define FB_DEFDEV "/dev/fb0"
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#define MONO_OFFSET_8BIT 0x40
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#define COLORS_MONO_8BIT 0x40
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#define MONO_MASK_8BIT 0xFC
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#define MONO_SHIFT_8BIT 2
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#define COLOR_OFFSET_8BIT 0x80
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#define COLORS_8BIT 0x80
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#define RED_MASK_8BIT 0xC0
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#define GREEN_MASK_8BIT 0xE0
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#define BLUE_MASK_8BIT 0xC0
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#define RED_SHIFT_8BIT 1
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#define GREEN_SHIFT_8BIT 3
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#define BLUE_SHIFT_8BIT 6
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#define FALSE 0
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#define TRUE 1
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#define IMAGE_SIZE_MAX 10000
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static struct fb_cmap *fb_cmap_create(struct fb_fix_screeninfo *,
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struct fb_var_screeninfo *);
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static void fb_cmap_destroy(struct fb_cmap *cmap);
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static int fb_fscrn_get(int fbfp, struct fb_fix_screeninfo *scinfo);
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static void *fb_mmap(int fbfp, struct fb_fix_screeninfo *scinfo);
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static int fb_munmap(void *buf, struct fb_fix_screeninfo *scinfo);
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static int fb_vscrn_get(int fbfp, struct fb_var_screeninfo *scinfo);
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static int fb_cmap_set(int fbfp, struct fb_cmap *cmap);
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static int fb_cmap_get(int fbfp, struct fb_cmap *cmap);
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static int fb_cmap_init(void);
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static int fb_get_cmap_index(int r, int g, int b);
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static unsigned long fb_get_packed_color(int r, int g, int b);
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static struct fb_fix_screeninfo fscinfo;
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static struct fb_var_screeninfo vscinfo;
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static struct fb_cmap *cmap = NULL, *cmap_org = NULL;
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static int is_open = FALSE;
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static int fbfp = -1;
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static size_t pixel_size = 0;
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static unsigned char *buf = NULL;
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int
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fb_open(void)
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{
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char *fbdev = { FB_DEFDEV };
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if (is_open == TRUE)
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return 1;
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if (getenv(FB_ENV)) {
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fbdev = getenv(FB_ENV);
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}
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if ((fbfp = open(fbdev, O_RDWR)) == -1) {
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fprintf(stderr, "open %s error\n", fbdev);
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goto ERR_END;
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}
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if (fb_fscrn_get(fbfp, &fscinfo)) {
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goto ERR_END;
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}
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if (fb_vscrn_get(fbfp, &vscinfo)) {
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goto ERR_END;
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}
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if ((cmap = fb_cmap_create(&fscinfo, &vscinfo)) == (struct fb_cmap *)-1) {
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goto ERR_END;
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}
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if (!(buf = fb_mmap(fbfp, &fscinfo))) {
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fprintf(stderr, "Can't allocate memory.\n");
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goto ERR_END;
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}
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if (fscinfo.type != FB_TYPE_PACKED_PIXELS) {
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fprintf(stderr, "This type of framebuffer is not supported.\n");
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goto ERR_END;
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}
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if (fscinfo.visual == FB_VISUAL_PSEUDOCOLOR && vscinfo.bits_per_pixel == 8) {
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if (fb_cmap_get(fbfp, cmap)) {
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fprintf(stderr, "Can't get color map.\n");
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fb_cmap_destroy(cmap);
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cmap = NULL;
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goto ERR_END;
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}
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if (fb_cmap_init())
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goto ERR_END;
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pixel_size = 1;
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}
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else if ((fscinfo.visual == FB_VISUAL_TRUECOLOR ||
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fscinfo.visual == FB_VISUAL_DIRECTCOLOR) &&
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(vscinfo.bits_per_pixel == 15 ||
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vscinfo.bits_per_pixel == 16 ||
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vscinfo.bits_per_pixel == 24 || vscinfo.bits_per_pixel == 32)) {
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pixel_size = (vscinfo.bits_per_pixel + 7) / CHAR_BIT;
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}
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else {
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fprintf(stderr, "This type of framebuffer is not supported.\n");
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goto ERR_END;
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}
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is_open = TRUE;
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return 0;
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ERR_END:
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fb_close();
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return 1;
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}
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void
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fb_close(void)
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{
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if (is_open != TRUE)
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return;
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if (cmap != NULL) {
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fb_cmap_destroy(cmap);
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cmap = NULL;
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}
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if (cmap_org != NULL) {
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fb_cmap_set(fbfp, cmap_org);
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fb_cmap_destroy(cmap_org);
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cmap = NULL;
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}
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if (buf != NULL) {
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fb_munmap(buf, &fscinfo);
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buf = NULL;
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}
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if (fbfp >= 0) {
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close(fbfp);
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}
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is_open = FALSE;
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}
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/*********** fb_image_* ***********/
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FB_IMAGE *
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fb_image_new(int width, int height)
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{
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FB_IMAGE *image;
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if (is_open != TRUE)
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return NULL;
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if (width > IMAGE_SIZE_MAX || height > IMAGE_SIZE_MAX || width < 1
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|| height < 1)
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return NULL;
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image = malloc(sizeof(*image));
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if (image == NULL)
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return NULL;
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image->data = calloc(sizeof(*(image->data)), width * height * pixel_size);
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if (image->data == NULL) {
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free(image);
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return NULL;
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}
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image->num = 1;
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image->id = 0;
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image->delay = 0;
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image->width = width;
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image->height = height;
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image->rowstride = width * pixel_size;
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image->len = width * height * pixel_size;
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return image;
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}
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void
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fb_image_free(FB_IMAGE * image)
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{
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if (image == NULL)
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return;
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if (image->data != NULL)
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free(image->data);
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free(image);
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}
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void
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fb_image_pset(FB_IMAGE * image, int x, int y, int r, int g, int b)
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{
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unsigned long work;
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if (image == NULL || is_open != TRUE || x >= image->width
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|| y >= image->height)
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return;
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work = fb_get_packed_color(r, g, b);
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memcpy(image->data + image->rowstride * y + pixel_size * x, &work,
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pixel_size);
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}
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void
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fb_image_fill(FB_IMAGE * image, int r, int g, int b)
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{
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unsigned long work;
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int offset;
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if (image == NULL || is_open != TRUE)
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return;
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work = fb_get_packed_color(r, g, b);
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for (offset = 0; offset < image->len; offset += pixel_size) {
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memcpy(image->data + offset, &work, pixel_size);
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}
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}
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int
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fb_image_draw(FB_IMAGE * image, int x, int y, int sx, int sy, int width,
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int height)
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{
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int i, offset_fb, offset_img;
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if (image == NULL || is_open != TRUE ||
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sx > image->width || sy > image->height ||
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x > fb_width() || y > fb_height())
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return 1;
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if (sx + width > image->width)
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width = image->width - sx;
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if (sy + height > image->height)
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height = image->height - sy;
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if (x + width > fb_width())
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width = fb_width() - x;
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if (y + height > fb_height())
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height = fb_height() - y;
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offset_fb = fscinfo.line_length * y + pixel_size * x;
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offset_img = image->rowstride * sy + pixel_size * sx;
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for (i = 0; i < height; i++) {
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memcpy(buf + offset_fb, image->data + offset_img, pixel_size * width);
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offset_fb += fscinfo.line_length;
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offset_img += image->rowstride;
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}
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return 0;
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}
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void
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fb_image_copy(FB_IMAGE * dest, FB_IMAGE * src)
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{
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if (dest == NULL || src == NULL)
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return;
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if (dest->len != src->len)
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return;
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memcpy(dest->data, src->data, src->len);
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}
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/*********** fb_frame_* ***********/
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FB_IMAGE **
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fb_frame_new(int w, int h, int n)
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{
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FB_IMAGE **frame;
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int i, error = 0;
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if (w > IMAGE_SIZE_MAX || h > IMAGE_SIZE_MAX || w < 1 || h < 1 || n < 1)
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return NULL;
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frame = malloc(sizeof(*frame) * n);
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if (frame == NULL)
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return NULL;
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for (i = 0; i < n; i++) {
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frame[i] = fb_image_new(w, h);
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frame[i]->num = n;
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frame[i]->id = i;
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frame[i]->delay = 1000;
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if (frame[i] == NULL)
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error = 1;
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}
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if (error) {
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fb_frame_free(frame);
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return NULL;
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}
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return frame;
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}
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void
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fb_frame_free(FB_IMAGE ** frame)
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{
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int i, n;
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if (frame == NULL)
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return;
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n = frame[0]->num;
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for (i = 0; i < n; i++) {
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fb_image_free(frame[i]);
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}
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free(frame);
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}
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int
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fb_width(void)
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{
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if (is_open != TRUE)
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return 0;
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return vscinfo.xres;
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}
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int
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fb_height(void)
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{
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if (is_open != TRUE)
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return 0;
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return vscinfo.yres;
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}
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int
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fb_clear(int x, int y, int w, int h, int r, int g, int b)
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{
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int i, offset_fb;
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static int rr = -1, gg = -1, bb = -1;
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static char *tmp = NULL;
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if (is_open != TRUE || x > fb_width() || y > fb_height())
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return 1;
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if (x < 0)
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x = 0;
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if (y < 0)
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y = 0;
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if (x + w > fb_width())
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w = fb_width() - x;
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if (y + h > fb_height())
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h = fb_height() - y;
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if (tmp == NULL) {
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tmp = malloc(fscinfo.line_length);
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if (tmp == NULL)
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return 1;
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}
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if (rr != r || gg != g || bb != b) {
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unsigned long work;
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int ww = fb_width();
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work = fb_get_packed_color(r, g, b);
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for (i = 0; i < ww; i++)
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memcpy(tmp + pixel_size * i, &work, pixel_size);
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rr = r;
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gg = g;
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bb = b;
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}
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offset_fb = fscinfo.line_length * y + pixel_size * x;
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for (i = 0; i < h; i++) {
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memcpy(buf + offset_fb, tmp, pixel_size * w);
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offset_fb += fscinfo.line_length;
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}
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return 0;
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}
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/********* static functions **************/
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static unsigned long
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fb_get_packed_color(int r, int g, int b)
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{
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if (pixel_size == 1) {
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return fb_get_cmap_index(r, g, b);
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}
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else {
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return
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((r >> (CHAR_BIT - vscinfo.red.length)) << vscinfo.red.offset) +
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((g >> (CHAR_BIT - vscinfo.green.length)) << vscinfo.green.
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offset) +
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((b >> (CHAR_BIT - vscinfo.blue.length)) << vscinfo.blue.offset);
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}
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}
|
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|
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static int
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fb_get_cmap_index(int r, int g, int b)
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||||
{
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int work;
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||||
if ((r & GREEN_MASK_8BIT) == (g & GREEN_MASK_8BIT)
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&& (g & GREEN_MASK_8BIT) == (b & GREEN_MASK_8BIT)) {
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work = (r >> MONO_SHIFT_8BIT) + MONO_OFFSET_8BIT;
|
||||
}
|
||||
else {
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||||
work = ((r & RED_MASK_8BIT) >> RED_SHIFT_8BIT)
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||||
+ ((g & GREEN_MASK_8BIT) >> GREEN_SHIFT_8BIT)
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+ ((b & BLUE_MASK_8BIT) >> BLUE_SHIFT_8BIT)
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+ COLOR_OFFSET_8BIT;
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||||
}
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return work;
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||||
}
|
||||
|
||||
static int
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fb_cmap_init(void)
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||||
{
|
||||
int lp;
|
||||
|
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if (cmap == NULL)
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||||
return 1;
|
||||
|
||||
if (cmap->len < COLOR_OFFSET_8BIT + COLORS_8BIT) {
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fprintf(stderr, "Can't allocate enough color.\n");
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return 1;
|
||||
}
|
||||
|
||||
if (cmap_org == NULL) {
|
||||
if ((cmap_org =
|
||||
fb_cmap_create(&fscinfo, &vscinfo)) == (struct fb_cmap *)-1) {
|
||||
return 1;
|
||||
}
|
||||
|
||||
if (fb_cmap_get(fbfp, cmap_org)) {
|
||||
fprintf(stderr, "Can't get color map.\n");
|
||||
fb_cmap_destroy(cmap_org);
|
||||
cmap_org = NULL;
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
cmap->start = MONO_OFFSET_8BIT;
|
||||
cmap->len = COLORS_8BIT + COLORS_MONO_8BIT;
|
||||
|
||||
for (lp = 0; lp < COLORS_MONO_8BIT; lp++) {
|
||||
int c;
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||||
c = (lp << (MONO_SHIFT_8BIT + 8)) +
|
||||
(lp ? (0xFFFF - (MONO_MASK_8BIT << 8)) : 0);
|
||||
if (cmap->red)
|
||||
*(cmap->red + lp) = c;
|
||||
if (cmap->green)
|
||||
*(cmap->green + lp) = c;
|
||||
if (cmap->blue)
|
||||
*(cmap->blue + lp) = c;
|
||||
}
|
||||
|
||||
for (lp = 0; lp < COLORS_8BIT; lp++) {
|
||||
int r, g, b;
|
||||
r = lp & (RED_MASK_8BIT >> RED_SHIFT_8BIT);
|
||||
g = lp & (GREEN_MASK_8BIT >> GREEN_SHIFT_8BIT);
|
||||
b = lp & (BLUE_MASK_8BIT >> BLUE_SHIFT_8BIT);
|
||||
if (cmap->red)
|
||||
*(cmap->red + lp + COLORS_MONO_8BIT)
|
||||
= (r << (RED_SHIFT_8BIT + 8)) +
|
||||
(r ? (0xFFFF - (RED_MASK_8BIT << 8)) : 0);
|
||||
if (cmap->green)
|
||||
*(cmap->green + lp + COLORS_MONO_8BIT)
|
||||
= (g << (GREEN_SHIFT_8BIT + 8)) +
|
||||
(g ? (0xFFFF - (GREEN_MASK_8BIT << 8)) : 0);
|
||||
if (cmap->blue)
|
||||
*(cmap->blue + lp + COLORS_MONO_8BIT)
|
||||
= (b << (BLUE_SHIFT_8BIT + 8)) +
|
||||
(b ? (0xFFFF - (BLUE_MASK_8BIT << 8)) : 0);
|
||||
}
|
||||
|
||||
if (fb_cmap_set(fbfp, cmap)) {
|
||||
fb_cmap_destroy(cmap);
|
||||
cmap = NULL;
|
||||
fprintf(stderr, "Can't set color map.\n");
|
||||
return 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* (struct fb_cmap) Device independent colormap information.
|
||||
*
|
||||
* fb_cmap_create() create colormap information
|
||||
* fb_cmap_destroy() destroy colormap information
|
||||
* fb_cmap_get() get information
|
||||
* fb_cmap_set() set information
|
||||
*/
|
||||
|
||||
#define LUT_MAX (256)
|
||||
|
||||
static struct fb_cmap *
|
||||
fb_cmap_create(struct fb_fix_screeninfo *fscinfo,
|
||||
struct fb_var_screeninfo *vscinfo)
|
||||
{
|
||||
struct fb_cmap *cmap;
|
||||
int cmaplen = LUT_MAX;
|
||||
|
||||
/* check the existence of colormap */
|
||||
if (fscinfo->visual == FB_VISUAL_MONO01 ||
|
||||
fscinfo->visual == FB_VISUAL_MONO10 ||
|
||||
fscinfo->visual == FB_VISUAL_TRUECOLOR)
|
||||
return NULL;
|
||||
|
||||
cmap = (struct fb_cmap *)malloc(sizeof(struct fb_cmap));
|
||||
if (!cmap) {
|
||||
perror("cmap malloc error\n");
|
||||
return (struct fb_cmap *)-1;
|
||||
}
|
||||
memset(cmap, 0, sizeof(struct fb_cmap));
|
||||
|
||||
/* Allocates memory for a colormap */
|
||||
if (vscinfo->red.length) {
|
||||
cmap->red = (__u16 *) malloc(sizeof(__u16) * cmaplen);
|
||||
if (!cmap->red) {
|
||||
perror("red lut malloc error\n");
|
||||
return (struct fb_cmap *)-1;
|
||||
}
|
||||
}
|
||||
if (vscinfo->green.length) {
|
||||
cmap->green = (__u16 *) malloc(sizeof(__u16) * cmaplen);
|
||||
if (!cmap->green) {
|
||||
if (vscinfo->red.length)
|
||||
free(cmap->red);
|
||||
perror("green lut malloc error\n");
|
||||
return (struct fb_cmap *)-1;
|
||||
}
|
||||
}
|
||||
if (vscinfo->blue.length) {
|
||||
cmap->blue = (__u16 *) malloc(sizeof(__u16) * cmaplen);
|
||||
if (!cmap->blue) {
|
||||
if (vscinfo->red.length)
|
||||
free(cmap->red);
|
||||
if (vscinfo->green.length)
|
||||
free(cmap->green);
|
||||
perror("blue lut malloc error\n");
|
||||
return (struct fb_cmap *)-1;
|
||||
}
|
||||
}
|
||||
if (vscinfo->transp.length) {
|
||||
cmap->transp = (__u16 *) malloc(sizeof(__u16) * cmaplen);
|
||||
if (!cmap->transp) {
|
||||
if (vscinfo->red.length)
|
||||
free(cmap->red);
|
||||
if (vscinfo->green.length)
|
||||
free(cmap->green);
|
||||
if (vscinfo->blue.length)
|
||||
free(cmap->blue);
|
||||
perror("transp lut malloc error\n");
|
||||
return (struct fb_cmap *)-1;
|
||||
}
|
||||
}
|
||||
cmap->len = cmaplen;
|
||||
return cmap;
|
||||
}
|
||||
|
||||
static void
|
||||
fb_cmap_destroy(struct fb_cmap *cmap)
|
||||
{
|
||||
if (cmap->red)
|
||||
free(cmap->red);
|
||||
if (cmap->green)
|
||||
free(cmap->green);
|
||||
if (cmap->blue)
|
||||
free(cmap->blue);
|
||||
if (cmap->transp)
|
||||
free(cmap->transp);
|
||||
free(cmap);
|
||||
}
|
||||
|
||||
static int
|
||||
fb_cmap_get(int fbfp, struct fb_cmap *cmap)
|
||||
{
|
||||
if (ioctl(fbfp, FBIOGETCMAP, cmap)) {
|
||||
perror("ioctl FBIOGETCMAP error\n");
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
fb_cmap_set(int fbfp, struct fb_cmap *cmap)
|
||||
{
|
||||
if (ioctl(fbfp, FBIOPUTCMAP, cmap)) {
|
||||
perror("ioctl FBIOPUTCMAP error\n");
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* access to framebuffer
|
||||
*
|
||||
* fb_mmap() map from framebuffer into memory
|
||||
* fb_munmap() deletes the mappings
|
||||
*/
|
||||
|
||||
static void *
|
||||
fb_mmap(int fbfp, struct fb_fix_screeninfo *scinfo)
|
||||
{
|
||||
void *buf;
|
||||
if ((buf = (unsigned char *)
|
||||
mmap(NULL, scinfo->smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fbfp,
|
||||
(off_t) 0))
|
||||
== MAP_FAILED) {
|
||||
perror("mmap error");
|
||||
return NULL;
|
||||
}
|
||||
return buf;
|
||||
}
|
||||
|
||||
static int
|
||||
fb_munmap(void *buf, struct fb_fix_screeninfo *scinfo)
|
||||
{
|
||||
return munmap(buf, scinfo->smem_len);
|
||||
}
|
||||
|
||||
/*
|
||||
* (struct fb_fix_screeninfo) device independent fixed information
|
||||
*
|
||||
* fb_fscrn_get() get information
|
||||
*/
|
||||
static int
|
||||
fb_fscrn_get(int fbfp, struct fb_fix_screeninfo *scinfo)
|
||||
{
|
||||
if (ioctl(fbfp, FBIOGET_FSCREENINFO, scinfo)) {
|
||||
perror("ioctl FBIOGET_FSCREENINFO error\n");
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* (struct fb_var_screeninfo) device independent variable information
|
||||
*
|
||||
* fb_vscrn_get() get information
|
||||
*/
|
||||
static int
|
||||
fb_vscrn_get(int fbfp, struct fb_var_screeninfo *scinfo)
|
||||
{
|
||||
if (ioctl(fbfp, FBIOGET_VSCREENINFO, scinfo)) {
|
||||
perror("ioctl FBIOGET_VSCREENINFO error\n");
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user