e5b1a7d423
This unifies jpeg viewer, png viewer, and bmp viewer to one plugin, image viewer, so that you can navigate through different image formats. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28626 a1c6a512-1295-4272-9138-f99709370657
301 lines
8.3 KiB
C
301 lines
8.3 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* BMP image viewer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#include "bmp.h"
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#include "resize.h"
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#include <lib/feature_wrappers.h>
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#include <lib/pluginlib_bmp.h>
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#include "../imageviewer.h"
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#ifdef HAVE_LCD_COLOR
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#define resize_bitmap smooth_resize_bitmap
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#elif defined(USEGSLIB)
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#define resize_bitmap grey_resize_bitmap
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#else
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#define resize_bitmap simple_resize_bitmap
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#endif
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/**************** begin Application ********************/
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/************************* Types ***************************/
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struct t_disp
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{
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unsigned char* bitmap;
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};
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/************************* Globals ***************************/
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/* decompressed image in the possible sizes (1,2,4,8), wasting the other */
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static struct t_disp disp[9];
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/* my memory pool (from the mp3 buffer) */
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static char print[32]; /* use a common snprintf() buffer */
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/* the root of the images, hereafter are decompresed ones */
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static unsigned char* buf_root;
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static int root_size;
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/* up to here currently used by image(s) */
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static unsigned char* buf_images;
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static ssize_t buf_images_size;
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struct bitmap bmp;
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/************************* Implementation ***************************/
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#if defined(USEGSLIB) && (CONFIG_PLATFORM & PLATFORM_HOSTED)
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/* hack: fix error "undefined reference to `_grey_info'". */
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GREY_INFO_STRUCT
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#endif /* USEGSLIB */
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static void draw_image_rect(struct image_info *info,
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int x, int y, int width, int height)
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{
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struct t_disp* pdisp = (struct t_disp*)info->data;
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#ifdef HAVE_LCD_COLOR
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rb->lcd_bitmap_part(
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(fb_data*)pdisp->bitmap, info->x + x, info->y + y,
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STRIDE(SCREEN_MAIN, info->width, info->height),
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x + MAX(0, (LCD_WIDTH-info->width)/2),
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y + MAX(0, (LCD_HEIGHT-info->height)/2),
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width, height);
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#else
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mylcd_ub_gray_bitmap_part(
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pdisp->bitmap, info->x + x, info->y + y, info->width,
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x + MAX(0, (LCD_WIDTH-info->width)/2),
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y + MAX(0, (LCD_HEIGHT-info->height)/2),
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width, height);
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#endif
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}
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static int img_mem(int ds)
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{
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#ifndef USEGSLIB
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return (bmp.width/ds) * (bmp.height/ds) * sizeof (fb_data);
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#else
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return (bmp.width/ds) * (bmp.height/ds);
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#endif
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}
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static int load_image(char *filename, struct image_info *info,
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unsigned char *buf, ssize_t *buf_size)
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{
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int w, h; /* used to center output */
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long time; /* measured ticks */
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int fd;
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int size;
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int format = FORMAT_NATIVE;
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#ifdef USEGSLIB
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const struct custom_format *cformat = &format_grey;
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#else
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const struct custom_format *cformat = &format_native;
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#endif
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rb->memset(&disp, 0, sizeof(disp));
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rb->memset(&bmp, 0, sizeof(bmp)); /* clear info struct */
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if ((intptr_t)buf & 3)
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{
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*buf_size -= 4-((intptr_t)buf&3);
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buf += 4-((intptr_t)buf&3);
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}
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fd = rb->open(filename, O_RDONLY);
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if (fd < 0)
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{
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rb->splashf(HZ, "err opening %s: %d", filename, fd);
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return PLUGIN_ERROR;
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}
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int ds = 1;
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/* check size of image needed to load image. */
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size = scaled_read_bmp_fd(fd, &bmp, 0, format | FORMAT_RETURN_SIZE, cformat);
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#if (LCD_PIXEL_ASPECT_HEIGHT != 1 || LCD_PIXEL_ASPECT_WIDTH != 1)
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if (size <= *buf_size)
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{
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/* correct aspect */
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format |= FORMAT_RESIZE|FORMAT_KEEP_ASPECT;
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bmp.width *= LCD_PIXEL_ASPECT_HEIGHT;
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bmp.height *= LCD_PIXEL_ASPECT_WIDTH;
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bmp.width /= MAX(LCD_PIXEL_ASPECT_HEIGHT, LCD_PIXEL_ASPECT_WIDTH);
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bmp.height /= MAX(LCD_PIXEL_ASPECT_HEIGHT, LCD_PIXEL_ASPECT_WIDTH);
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}
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#endif
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#ifdef USE_PLUG_BUF
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if (!iv->plug_buf)
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#endif
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{
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while (size > *buf_size && bmp.width >= 2 && bmp.height >= 2 && ds < 8)
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{
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/* too large for the buffer. resize on load. */
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format |= FORMAT_RESIZE|FORMAT_KEEP_ASPECT;
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ds *= 2;
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bmp.width /= 2;
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bmp.height /= 2;
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rb->lseek(fd, 0, SEEK_SET);
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size = scaled_read_bmp_fd(fd, &bmp, 0, format | FORMAT_RETURN_SIZE, cformat);
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}
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}
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if (size <= 0)
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{
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rb->close(fd);
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rb->splashf(HZ, "read error %d", size);
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return PLUGIN_ERROR;
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}
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if (size > *buf_size)
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{
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rb->close(fd);
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return PLUGIN_OUTOFMEM;
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}
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if (!iv->running_slideshow)
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{
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rb->lcd_puts(0, 0, rb->strrchr(filename,'/')+1);
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rb->lcd_putsf(0, 1, "loading %dx%d%s",
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bmp.width, bmp.height, ds == 1?"":"(resize on load)");
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rb->lcd_update();
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}
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/* allocate bitmap buffer */
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bmp.data = buf;
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/* actual loading */
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time = *rb->current_tick;
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rb->lseek(fd, 0, SEEK_SET);
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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rb->cpu_boost(true);
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size = scaled_read_bmp_fd(fd, &bmp, *buf_size, format, cformat);
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rb->cpu_boost(false);
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#else
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size = scaled_read_bmp_fd(fd, &bmp, *buf_size, format, cformat);
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#endif /*HAVE_ADJUSTABLE_CPU_FREQ*/
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rb->close(fd);
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time = *rb->current_tick - time;
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if (size <= 0)
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{
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rb->splashf(HZ, "load error %d", size);
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return PLUGIN_ERROR;
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}
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if (!iv->running_slideshow)
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{
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rb->snprintf(print, sizeof(print), " %ld.%02ld sec ", time/HZ, time%HZ);
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rb->lcd_getstringsize(print, &w, &h); /* centered in progress bar */
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rb->lcd_putsxy((LCD_WIDTH - w)/2, LCD_HEIGHT - h, print);
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rb->lcd_update();
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}
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#ifdef DISK_SPINDOWN
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else if(iv->immediate_ata_off)
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{
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/* running slideshow and time is long enough: power down disk */
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rb->storage_sleep();
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}
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#endif
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/* we can start the resized images behind it */
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buf_images = buf_root = buf + size;
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buf_images_size = root_size = *buf_size - size;
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if (!iv->running_slideshow)
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{
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rb->lcd_putsf(0, 2, "image %dx%d", bmp.width, bmp.height);
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rb->lcd_update();
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}
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info->x_size = bmp.width;
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info->y_size = bmp.height;
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*buf_size = buf_images_size;
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return PLUGIN_OK;
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}
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static int get_image(struct image_info *info, int ds)
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{
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struct t_disp* p_disp = &disp[ds]; /* short cut */
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info->width = bmp.width/ds;
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info->height = bmp.height/ds;
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info->data = p_disp;
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if (p_disp->bitmap != NULL)
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{
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/* we still have it */
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return PLUGIN_OK;
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}
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/* assign image buffer */
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if (ds > 1)
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{
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int size; /* resized image size */
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struct bitmap bmp_dst;
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size = img_mem(ds);
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if (buf_images_size <= size)
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{
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/* have to discard the current */
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int i;
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for (i=1; i<=8; i++)
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disp[i].bitmap = NULL; /* invalidate all bitmaps */
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buf_images = buf_root; /* start again from the beginning of the buffer */
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buf_images_size = root_size;
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}
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p_disp->bitmap = buf_images;
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buf_images += size;
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buf_images_size -= size;
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if (!iv->running_slideshow)
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{
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rb->lcd_putsf(0, 3, "resizing %d*%d", info->width, info->height);
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rb->lcd_update();
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}
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bmp_dst.width = info->width;
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bmp_dst.height = info->height;
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bmp_dst.data = p_disp->bitmap;
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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rb->cpu_boost(true);
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resize_bitmap(&bmp, &bmp_dst);
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rb->cpu_boost(false);
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#else
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resize_bitmap(&bmp, &bmp_dst);
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#endif /*HAVE_ADJUSTABLE_CPU_FREQ*/
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}
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else
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{
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p_disp->bitmap = bmp.data;
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}
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return PLUGIN_OK;
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}
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const struct image_decoder image_decoder = {
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true,
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img_mem,
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load_image,
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get_image,
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draw_image_rect,
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};
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IMGDEC_HEADER
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