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rockbox/apps/plugins/imageviewer/imageviewer.c
William Wilgus 3237ae4a4f LCD core move buf ptr and address look up function viewport struct 
I'm currently running up against the limitations of the lcd_draw functions
I want these functions to be able to be used on any size buffer not
just buffers with a stride matching the underlying device

[DONE] allow the framebuffer to be decoupled from the device framebuffer
[DONE need examples] allow for some simple blit like transformations
[DONE] remove the device framebuffer from the plugin api
[DONE}ditto remote framebuffer
[DONE] remove _viewport_get_framebuffer you can call struct *vp = lcd_set_viewport(NULL) and vp->buffer->fb_ptr

while remote lcds may compile (and work in the sim) its not been tested on targets

[FIXED] backdrops need work to be screen agnostic

[FIXED] screen statusbar is not being combined into the main viewport correctly yet

[FIXED] screen elements are displayed incorrectly  after switch to void*

[FIXED] core didn't restore proper viewport on splash etc.

[NEEDS TESTING] remote lcd garbled data

[FIXED] osd lib garbled screen on bmp_part

[FIXED] grey_set_vp needs to return old viewport like lcd_set_viewport

[FIXED] Viewport update now handles viewports with differing buffers/strides by copying to the main buffer

[FIXED] splash on top of WPS leaves old framebuffer data (doesn't redraw)
[UPDATE] refined this a bit more to have clear_viewport set the clean bit and have skin_render do its own screen clear
scrolling viewports no longer trigger wps refresh
also fixed a bug where guisyncyesno was displaying and then disappearing

[ADDED!] New LCD macros that allow you to create properly size frame buffers in you desired size without wasting bytes
(LCD_ and LCD_REMOTE_)
LCD_STRIDE(w, h) same as STRIDE_MAIN
LCD_FBSTRIDE(w, h) returns target specific stride for a buffer W x H
LCD_NBELEMS(w, h) returns the number of fb_data sized elemenst needed for a buffer W x H
LCD_NATIVE_STRIDE(s) conversion between rockbox native vertical and lcd native stride (2bitH)
test_viewports.c has an example of usage

[FIXED!!] 2bit targets don't respect non-native strides
[FIXED] Few define snags

Change-Id: I0d04c3834e464eca84a5a715743a297a0cefd0af
2020-10-26 12:28:48 -04:00

1075 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* user intereface of image viewer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* TODO:
* - check magick value in file header to determine image type.
*/
#include "plugin.h"
#include <lib/playback_control.h>
#include <lib/helper.h>
#include <lib/configfile.h>
#include "imageviewer.h"
#include "imageviewer_button.h"
#include "image_decoder.h"
#ifdef USEGSLIB
GREY_INFO_STRUCT
#endif
/* Headings */
#define DIR_PREV 1
#define DIR_NEXT -1
#define DIR_NONE 0
/******************************* Globals ***********************************/
/* Persistent configuration */
#define IMGVIEW_CONFIGFILE "imageviewer.cfg"
#define IMGVIEW_SETTINGS_MINVERSION 1
#define IMGVIEW_SETTINGS_VERSION 2
/* Slideshow times */
#define SS_MIN_TIMEOUT 1
#define SS_MAX_TIMEOUT 20
#define SS_DEFAULT_TIMEOUT 5
#ifdef HAVE_LCD_COLOR
/* needed for value of settings */
#include "jpeg/yuv2rgb.h"
#endif
static struct imgview_settings settings =
{
#ifdef HAVE_LCD_COLOR
COLOURMODE_COLOUR,
DITHER_NONE,
#endif
SS_DEFAULT_TIMEOUT
};
static struct imgview_settings old_settings;
static struct configdata config[] =
{
#ifdef HAVE_LCD_COLOR
{ TYPE_ENUM, 0, COLOUR_NUM_MODES, { .int_p = &settings.jpeg_colour_mode },
"Colour Mode", (char *[]){ "Colour", "Grayscale" } },
{ TYPE_ENUM, 0, DITHER_NUM_MODES, { .int_p = &settings.jpeg_dither_mode },
"Dither Mode", (char *[]){ "None", "Ordered", "Diffusion" } },
#endif
{ TYPE_INT, SS_MIN_TIMEOUT, SS_MAX_TIMEOUT,
{ .int_p = &settings.ss_timeout }, "Slideshow Time", NULL },
};
static void cb_progress(int current, int total);
static struct imgdec_api iv_api = {
.settings = &settings,
.slideshow_enabled = false,
.running_slideshow = false,
#ifdef DISK_SPINDOWN
.immediate_ata_off = false,
#endif
#ifdef USE_PLUG_BUF
.plug_buf = true,
#endif
.cb_progress = cb_progress,
#ifdef USEGSLIB
.gray_bitmap_part = myxlcd_ub_(gray_bitmap_part),
#endif
};
/**************** begin Application ********************/
/************************* Globals ***************************/
#ifdef HAVE_LCD_COLOR
static fb_data rgb_linebuf[LCD_WIDTH]; /* Line buffer for scrolling when
DITHER_DIFFUSION is set */
#endif
/* buffer to load image decoder */
static unsigned char* decoder_buf;
static size_t decoder_buf_size;
/* the remaining free part of the buffer for loaded+resized images */
static unsigned char* buf;
static size_t buf_size;
static int ds, ds_min, ds_max; /* downscaling and limits */
static struct image_info image_info;
/* the current full file name */
static char np_file[MAX_PATH];
static int curfile = -1, direction = DIR_NEXT, entries = 0;
/* list of the supported image files */
static char **file_pt;
static const struct image_decoder *imgdec = NULL;
static enum image_type image_type = IMAGE_UNKNOWN;
/************************* Implementation ***************************/
/* Read directory contents for scrolling. */
static void get_pic_list(void)
{
struct tree_context *tree = rb->tree_get_context();
struct entry *dircache = rb->tree_get_entries(tree);
int i;
char *pname;
file_pt = (char **) buf;
/* Remove path and leave only the name.*/
pname = rb->strrchr(np_file,'/');
pname++;
for (i = 0; i < tree->filesindir && buf_size > sizeof(char**); i++)
{
/* Add all files. Non-image files will be filtered out while loading. */
if (!(dircache[i].attr & ATTR_DIRECTORY))
{
file_pt[entries] = dircache[i].name;
/* Set Selected File. */
if (!rb->strcmp(file_pt[entries], pname))
curfile = entries;
entries++;
buf += (sizeof(char**));
buf_size -= (sizeof(char**));
}
}
}
static int change_filename(int direct)
{
bool file_erased = (file_pt[curfile] == NULL);
direction = direct;
curfile += (direct == DIR_PREV? entries - 1: 1);
if (curfile >= entries)
curfile -= entries;
if (file_erased)
{
/* remove 'erased' file names from list. */
int count, i;
for (count = i = 0; i < entries; i++)
{
if (curfile == i)
curfile = count;
if (file_pt[i] != NULL)
file_pt[count++] = file_pt[i];
}
entries = count;
}
if (entries == 0)
{
rb->splash(HZ, "No supported files");
return PLUGIN_ERROR;
}
rb->strcpy(rb->strrchr(np_file, '/')+1, file_pt[curfile]);
return PLUGIN_OTHER;
}
/* switch off overlay, for handling SYS_ events */
static void cleanup(void *parameter)
{
(void)parameter;
#ifdef USEGSLIB
grey_show(false);
#endif
}
#ifdef HAVE_LCD_COLOR
static bool set_option_grayscale(void)
{
bool gray = settings.jpeg_colour_mode == COLOURMODE_GRAY;
rb->set_bool("Grayscale (Jpeg)", &gray);
settings.jpeg_colour_mode = gray ? COLOURMODE_GRAY : COLOURMODE_COLOUR;
return false;
}
static bool set_option_dithering(void)
{
static const struct opt_items dithering[DITHER_NUM_MODES] = {
[DITHER_NONE] = { STR(LANG_OFF) },
[DITHER_ORDERED] = { STR(LANG_ORDERED) },
[DITHER_DIFFUSION] = { STR(LANG_DIFFUSION) },
};
rb->set_option(rb->str(LANG_DITHERING), &settings.jpeg_dither_mode, INT,
dithering, DITHER_NUM_MODES, NULL);
return false;
}
MENUITEM_FUNCTION(grayscale_item, 0, ID2P(LANG_GRAYSCALE),
set_option_grayscale, NULL, NULL, Icon_NOICON);
MENUITEM_FUNCTION(dithering_item, 0, ID2P(LANG_DITHERING),
set_option_dithering, NULL, NULL, Icon_NOICON);
MAKE_MENU(display_menu, "Display Options", NULL, Icon_NOICON,
&grayscale_item, &dithering_item);
static void display_options(void)
{
rb->do_menu(&display_menu, NULL, NULL, false);
}
#endif /* HAVE_LCD_COLOR */
static int show_menu(void) /* return 1 to quit */
{
int result;
enum menu_id
{
MIID_RETURN = 0,
MIID_TOGGLE_SS_MODE,
MIID_CHANGE_SS_MODE,
#ifdef USE_PLUG_BUF
MIID_SHOW_PLAYBACK_MENU,
#endif
#ifdef HAVE_LCD_COLOR
MIID_DISPLAY_OPTIONS,
#endif
MIID_QUIT,
};
MENUITEM_STRINGLIST(menu, "Image Viewer Menu", NULL,
ID2P(LANG_RETURN),
ID2P(LANG_SLIDESHOW_MODE),
ID2P(LANG_SLIDESHOW_TIME),
#ifdef USE_PLUG_BUF
ID2P(LANG_PLAYBACK_CONTROL),
#endif
#ifdef HAVE_LCD_COLOR
ID2P(LANG_MENU_DISPLAY_OPTIONS),
#endif
ID2P(LANG_MENU_QUIT));
static const struct opt_items slideshow[2] = {
{ STR(LANG_OFF) },
{ STR(LANG_ON) },
};
result=rb->do_menu(&menu, NULL, NULL, false);
switch (result)
{
case MIID_RETURN:
break;
case MIID_TOGGLE_SS_MODE:
rb->set_option(rb->str(LANG_SLIDESHOW_MODE), &iv_api.slideshow_enabled, BOOL,
slideshow , 2, NULL);
break;
case MIID_CHANGE_SS_MODE:
rb->set_int(rb->str(LANG_SLIDESHOW_TIME), "s", UNIT_SEC,
&settings.ss_timeout, NULL, 1,
SS_MIN_TIMEOUT, SS_MAX_TIMEOUT, NULL);
break;
#ifdef USE_PLUG_BUF
case MIID_SHOW_PLAYBACK_MENU:
if (iv_api.plug_buf)
{
playback_control(NULL);
}
else
{
rb->splash(HZ, ID2P(LANG_CANNOT_RESTART_PLAYBACK));
}
break;
#endif
#ifdef HAVE_LCD_COLOR
case MIID_DISPLAY_OPTIONS:
display_options();
break;
#endif
case MIID_QUIT:
return 1;
break;
}
#ifdef DISK_SPINDOWN
/* change ata spindown time based on slideshow time setting */
iv_api.immediate_ata_off = false;
rb->storage_spindown(rb->global_settings->disk_spindown);
if (iv_api.slideshow_enabled)
{
if(settings.ss_timeout < 10)
{
/* slideshow times < 10s keep disk spinning */
rb->storage_spindown(0);
}
else if (!rb->pcm_is_playing())
{
/* slideshow times > 10s and not playing: ata_off after load */
iv_api.immediate_ata_off = true;
}
}
#endif
#if LCD_DEPTH > 1
rb->lcd_set_backdrop(NULL);
rb->lcd_set_foreground(LCD_WHITE);
rb->lcd_set_background(LCD_BLACK);
#endif
rb->lcd_clear_display();
return 0;
}
#ifdef USE_PLUG_BUF
static int ask_and_get_audio_buffer(const char *filename)
{
int button;
#if defined(IMGVIEW_ZOOM_PRE)
int lastbutton = BUTTON_NONE;
#endif
rb->lcd_setfont(FONT_SYSFIXED);
rb->lcd_clear_display();
rb->lcd_puts(0, 0, rb->strrchr(filename,'/')+1);
rb->lcd_puts(0, 1, "Not enough plugin memory!");
rb->lcd_puts(0, 2, "Zoom In: Stop playback.");
if(entries > 1)
rb->lcd_puts(0, 3, "Left/Right: Skip File.");
rb->lcd_puts(0, 4, "Show Menu: Quit.");
rb->lcd_update();
rb->lcd_setfont(FONT_UI);
rb->button_clear_queue();
while (1)
{
if (iv_api.slideshow_enabled)
button = rb->button_get_w_tmo(settings.ss_timeout * HZ);
else
button = rb->button_get(true);
switch(button)
{
case IMGVIEW_ZOOM_IN:
#ifdef IMGVIEW_ZOOM_PRE
if (lastbutton != IMGVIEW_ZOOM_PRE)
break;
#endif
iv_api.plug_buf = false;
buf = rb->plugin_get_audio_buffer(&buf_size);
/*try again this file, now using the audio buffer */
return PLUGIN_OTHER;
#ifdef IMGVIEW_RC_MENU
case IMGVIEW_RC_MENU:
#endif
#ifdef IMGVIEW_QUIT
case IMGVIEW_QUIT:
#endif
case IMGVIEW_MENU:
return PLUGIN_OK;
case IMGVIEW_LEFT:
if(entries>1)
{
rb->lcd_clear_display();
return change_filename(DIR_PREV);
}
break;
case IMGVIEW_RIGHT:
if(entries>1)
{
rb->lcd_clear_display();
return change_filename(DIR_NEXT);
}
break;
case BUTTON_NONE:
if(entries>1)
{
rb->lcd_clear_display();
return change_filename(direction);
}
break;
default:
if(rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
}
#if defined(IMGVIEW_ZOOM_PRE)
if (button != BUTTON_NONE)
lastbutton = button;
#endif
}
}
#endif /* USE_PLUG_BUF */
/* callback updating a progress meter while image decoding */
static void cb_progress(int current, int total)
{
rb->yield(); /* be nice to the other threads */
#ifndef USEGSLIB
/* in slideshow mode, keep gui interference to a minimum */
const int size = (!iv_api.running_slideshow ? 8 : 4);
#else
const int size = 8;
if(!iv_api.running_slideshow)
#endif
{
rb->gui_scrollbar_draw(rb->screens[SCREEN_MAIN],
0, LCD_HEIGHT-size, LCD_WIDTH, size,
total, 0, current, HORIZONTAL);
rb->lcd_update_rect(0, LCD_HEIGHT-size, LCD_WIDTH, size);
}
}
#define VSCROLL (LCD_HEIGHT/8)
#define HSCROLL (LCD_WIDTH/10)
/* Pan the viewing window right - move image to the left and fill in
the right-hand side */
static void pan_view_right(struct image_info *info)
{
int move;
move = MIN(HSCROLL, info->width - info->x - LCD_WIDTH);
if (move > 0)
{
mylcd_ub_scroll_left(move); /* scroll left */
info->x += move;
imgdec->draw_image_rect(info, LCD_WIDTH - move, 0,
move, info->height-info->y);
mylcd_ub_update();
}
}
/* Pan the viewing window left - move image to the right and fill in
the left-hand side */
static void pan_view_left(struct image_info *info)
{
int move;
move = MIN(HSCROLL, info->x);
if (move > 0)
{
mylcd_ub_scroll_right(move); /* scroll right */
info->x -= move;
imgdec->draw_image_rect(info, 0, 0, move, info->height-info->y);
mylcd_ub_update();
}
}
/* Pan the viewing window up - move image down and fill in
the top */
static void pan_view_up(struct image_info *info)
{
int move;
move = MIN(VSCROLL, info->y);
if (move > 0)
{
mylcd_ub_scroll_down(move); /* scroll down */
info->y -= move;
#ifdef HAVE_LCD_COLOR
if (image_type == IMAGE_JPEG
&& settings.jpeg_dither_mode == DITHER_DIFFUSION)
{
/* Draw over the band at the top of the last update
caused by lack of error history on line zero. */
move = MIN(move + 1, info->y + info->height);
}
#endif
imgdec->draw_image_rect(info, 0, 0, info->width-info->x, move);
mylcd_ub_update();
}
}
/* Pan the viewing window down - move image up and fill in
the bottom */
static void pan_view_down(struct image_info *info)
{
static fb_data *lcd_fb = NULL;
if (!lcd_fb)
{
struct viewport *vp_main = *(rb->screens[SCREEN_MAIN]->current_viewport);
lcd_fb = vp_main->buffer->fb_ptr;
}
int move;
move = MIN(VSCROLL, info->height - info->y - LCD_HEIGHT);
if (move > 0)
{
mylcd_ub_scroll_up(move); /* scroll up */
info->y += move;
#ifdef HAVE_LCD_COLOR
if (image_type == IMAGE_JPEG
&& settings.jpeg_dither_mode == DITHER_DIFFUSION)
{
/* Save the line that was on the last line of the display
and draw one extra line above then recover the line with
image data that had an error history when it was drawn.
*/
move++, info->y--;
rb->memcpy(rgb_linebuf,
lcd_fb + (LCD_HEIGHT - move)*LCD_WIDTH,
LCD_WIDTH*sizeof (fb_data));
}
#endif
imgdec->draw_image_rect(info, 0, LCD_HEIGHT - move,
info->width-info->x, move);
#ifdef HAVE_LCD_COLOR
if (image_type == IMAGE_JPEG
&& settings.jpeg_dither_mode == DITHER_DIFFUSION)
{
/* Cover the first row drawn with previous image data. */
rb->memcpy(lcd_fb + (LCD_HEIGHT - move)*LCD_WIDTH,
rgb_linebuf, LCD_WIDTH*sizeof (fb_data));
info->y++;
}
#endif
mylcd_ub_update();
}
}
/* interactively scroll around the image */
static int scroll_bmp(struct image_info *info)
{
static long ss_timeout = 0;
int button;
#if defined(IMGVIEW_ZOOM_PRE) || defined(IMGVIEW_MENU_PRE) \
|| defined(IMGVIEW_SLIDE_SHOW_PRE)
int lastbutton = BUTTON_NONE;
#endif
if (!ss_timeout && iv_api.slideshow_enabled)
ss_timeout = *rb->current_tick + settings.ss_timeout * HZ;
while (true)
{
if (iv_api.slideshow_enabled)
{
if (info->frames_count > 1 && info->delay &&
settings.ss_timeout * HZ > info->delay)
{
/* animated content and delay between subsequent frames
* is shorter then slideshow delay
*/
button = rb->button_get_w_tmo(info->delay);
}
else
button = rb->button_get_w_tmo(settings.ss_timeout * HZ);
}
else
{
if (info->frames_count > 1 && info->delay)
button = rb->button_get_w_tmo(info->delay);
else
button = rb->button_get(true);
}
iv_api.running_slideshow = false;
switch(button)
{
case IMGVIEW_LEFT:
if (entries > 1 && info->width <= LCD_WIDTH
&& info->height <= LCD_HEIGHT)
return change_filename(DIR_PREV);
case IMGVIEW_LEFT | BUTTON_REPEAT:
pan_view_left(info);
break;
case IMGVIEW_RIGHT:
if (entries > 1 && info->width <= LCD_WIDTH
&& info->height <= LCD_HEIGHT)
return change_filename(DIR_NEXT);
case IMGVIEW_RIGHT | BUTTON_REPEAT:
pan_view_right(info);
break;
case IMGVIEW_UP:
case IMGVIEW_UP | BUTTON_REPEAT:
pan_view_up(info);
break;
case IMGVIEW_DOWN:
case IMGVIEW_DOWN | BUTTON_REPEAT:
pan_view_down(info);
break;
case BUTTON_NONE:
if (iv_api.slideshow_enabled && entries > 1)
{
if (info->frames_count > 1)
{
/* animations */
if (TIME_AFTER(*rb->current_tick, ss_timeout))
{
iv_api.running_slideshow = true;
ss_timeout = 0;
return change_filename(DIR_NEXT);
}
else
return NEXT_FRAME;
}
else
{
/* still picture */
iv_api.running_slideshow = true;
return change_filename(DIR_NEXT);
}
}
else
return NEXT_FRAME;
break;
#ifdef IMGVIEW_SLIDE_SHOW
case IMGVIEW_SLIDE_SHOW:
#ifdef IMGVIEW_SLIDE_SHOW_PRE
if (lastbutton != IMGVIEW_SLIDE_SHOW_PRE)
break;
#endif
#ifdef IMGVIEW_SLIDE_SHOW2
case IMGVIEW_SLIDE_SHOW2:
#endif
iv_api.slideshow_enabled = !iv_api.slideshow_enabled;
break;
#endif
#ifdef IMGVIEW_NEXT_REPEAT
case IMGVIEW_NEXT_REPEAT:
#endif
case IMGVIEW_NEXT:
if (entries > 1)
return change_filename(DIR_NEXT);
break;
#ifdef IMGVIEW_PREVIOUS_REPEAT
case IMGVIEW_PREVIOUS_REPEAT:
#endif
case IMGVIEW_PREVIOUS:
if (entries > 1)
return change_filename(DIR_PREV);
break;
case IMGVIEW_ZOOM_IN:
#ifdef IMGVIEW_ZOOM_PRE
if (lastbutton != IMGVIEW_ZOOM_PRE)
break;
#endif
return ZOOM_IN;
break;
case IMGVIEW_ZOOM_OUT:
#ifdef IMGVIEW_ZOOM_PRE
if (lastbutton != IMGVIEW_ZOOM_PRE)
break;
#endif
return ZOOM_OUT;
break;
#ifdef IMGVIEW_RC_MENU
case IMGVIEW_RC_MENU:
#endif
case IMGVIEW_MENU:
#ifdef IMGVIEW_MENU_PRE
if (lastbutton != IMGVIEW_MENU_PRE)
break;
#endif
#ifdef USEGSLIB
grey_show(false); /* switch off greyscale overlay */
#endif
if (show_menu() == 1)
return PLUGIN_OK;
#ifdef USEGSLIB
grey_show(true); /* switch on greyscale overlay */
#else
imgdec->draw_image_rect(info, 0, 0,
info->width-info->x, info->height-info->y);
mylcd_ub_update();
#endif
break;
#ifdef IMGVIEW_QUIT
case IMGVIEW_QUIT:
return PLUGIN_OK;
break;
#endif
default:
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
break;
} /* switch */
#if defined(IMGVIEW_ZOOM_PRE) || defined(IMGVIEW_MENU_PRE) || defined(IMGVIEW_SLIDE_SHOW_PRE)
if (button != BUTTON_NONE)
lastbutton = button;
#endif
} /* while (true) */
}
/********************* main function *************************/
/* how far can we zoom in without running out of memory */
static int min_downscale(int bufsize)
{
int downscale = 8;
if (imgdec->img_mem(8) > bufsize)
return 0; /* error, too large, even 1:8 doesn't fit */
while (downscale > 1 && imgdec->img_mem(downscale/2) <= bufsize)
downscale /= 2;
return downscale;
}
/* how far can we zoom out, to fit image into the LCD */
static int max_downscale(struct image_info *info)
{
int downscale = 1;
while (downscale < 8 && (info->x_size/downscale > LCD_WIDTH
|| info->y_size/downscale > LCD_HEIGHT))
{
downscale *= 2;
}
return downscale;
}
/* set the view to the given center point, limit if necessary */
static void set_view(struct image_info *info, int cx, int cy)
{
int x, y;
/* plain center to available width/height */
x = cx - MIN(LCD_WIDTH, info->width) / 2;
y = cy - MIN(LCD_HEIGHT, info->height) / 2;
/* limit against upper image size */
x = MIN(info->width - LCD_WIDTH, x);
y = MIN(info->height - LCD_HEIGHT, y);
/* limit against negative side */
x = MAX(0, x);
y = MAX(0, y);
info->x = x; /* set the values */
info->y = y;
}
/* calculate the view center based on the bitmap position */
static void get_view(struct image_info *info, int *p_cx, int *p_cy)
{
*p_cx = info->x + MIN(LCD_WIDTH, info->width) / 2;
*p_cy = info->y + MIN(LCD_HEIGHT, info->height) / 2;
}
/* load, decode, display the image */
static int load_and_show(char* filename, struct image_info *info)
{
int status;
int cx, cy;
ssize_t remaining;
rb->lcd_clear_display();
/* suppress warning while running slideshow */
status = get_image_type(filename, iv_api.running_slideshow);
if (status == IMAGE_UNKNOWN) {
/* file isn't supported image file, skip this. */
file_pt[curfile] = NULL;
return change_filename(direction);
}
if (image_type != status) /* type of image is changed, load decoder. */
{
struct loader_info loader_info = {
status, &iv_api, decoder_buf, decoder_buf_size,
};
image_type = status;
imgdec = load_decoder(&loader_info);
if (imgdec == NULL)
{
/* something is wrong */
return PLUGIN_ERROR;
}
#ifdef USE_PLUG_BUF
if(iv_api.plug_buf)
{
buf = loader_info.buffer;
buf_size = loader_info.size;
}
#endif
}
rb->memset(info, 0, sizeof(*info));
remaining = buf_size;
if (rb->button_get(false) == IMGVIEW_MENU)
status = PLUGIN_ABORT;
else
status = imgdec->load_image(filename, info, buf, &remaining);
if (status == PLUGIN_OUTOFMEM)
{
#ifdef USE_PLUG_BUF
if(iv_api.plug_buf)
{
return ask_and_get_audio_buffer(filename);
}
else
#endif
{
rb->splash(HZ, "Out of Memory");
file_pt[curfile] = NULL;
return change_filename(direction);
}
}
else if (status == PLUGIN_ERROR)
{
file_pt[curfile] = NULL;
return change_filename(direction);
}
else if (status == PLUGIN_ABORT) {
rb->splash(HZ, "Aborted");
return PLUGIN_OK;
}
ds_max = max_downscale(info); /* check display constraint */
ds_min = min_downscale(remaining); /* check memory constraint */
if (ds_min == 0)
{
if (imgdec->unscaled_avail)
{
/* Can not resize the image but original one is available, so use it. */
ds_min = ds_max = 1;
}
else
#ifdef USE_PLUG_BUF
if (iv_api.plug_buf)
{
return ask_and_get_audio_buffer(filename);
}
else
#endif
{
rb->splash(HZ, "Too large");
file_pt[curfile] = NULL;
return change_filename(direction);
}
}
else if (ds_max < ds_min)
ds_max = ds_min;
ds = ds_max; /* initialize setting */
cx = info->x_size/ds/2; /* center the view */
cy = info->y_size/ds/2;
/* used to loop through subimages in animated gifs */
int frame = 0;
do /* loop the image prepare and decoding when zoomed */
{
status = imgdec->get_image(info, frame, ds); /* decode or fetch from cache */
if (status == PLUGIN_ERROR)
{
file_pt[curfile] = NULL;
return change_filename(direction);
}
set_view(info, cx, cy);
if(!iv_api.running_slideshow && (info->frames_count == 1))
{
rb->lcd_putsf(0, 3, "showing %dx%d", info->width, info->height);
rb->lcd_update();
}
mylcd_ub_clear_display();
imgdec->draw_image_rect(info, 0, 0,
info->width-info->x, info->height-info->y);
mylcd_ub_update();
#ifdef USEGSLIB
grey_show(true); /* switch on greyscale overlay */
#endif
/* drawing is now finished, play around with scrolling
* until you press OFF or connect USB
*/
while (1)
{
status = scroll_bmp(info);
if (status == ZOOM_IN)
{
if (ds > ds_min || (imgdec->unscaled_avail && ds > 1))
{
/* if 1/1 is always available, jump ds from ds_min to 1. */
int zoom = (ds == ds_min)? ds_min: 2;
ds /= zoom; /* reduce downscaling to zoom in */
get_view(info, &cx, &cy);
cx *= zoom; /* prepare the position in the new image */
cy *= zoom;
}
else
continue;
}
if (status == ZOOM_OUT)
{
if (ds < ds_max)
{
/* if ds is 1 and ds_min is > 1, jump ds to ds_min. */
int zoom = (ds < ds_min)? ds_min: 2;
ds *= zoom; /* increase downscaling to zoom out */
get_view(info, &cx, &cy);
cx /= zoom; /* prepare the position in the new image */
cy /= zoom;
}
else
continue;
}
/* next frame in animated content */
if (status == NEXT_FRAME)
frame = (frame + 1)%info->frames_count;
break;
}
rb->lcd_clear_display();
}
while (status > PLUGIN_OTHER);
#ifdef USEGSLIB
grey_show(false); /* switch off overlay */
rb->lcd_update();
#endif
return status;
}
/******************** Plugin entry point *********************/
enum plugin_status plugin_start(const void* parameter)
{
int condition;
#ifdef USEGSLIB
long greysize; /* helper */
#endif
if(!parameter) return PLUGIN_ERROR;
rb->strcpy(np_file, parameter);
if (get_image_type(np_file, false) == IMAGE_UNKNOWN)
{
rb->splash(HZ*2, "Unsupported file");
return PLUGIN_ERROR;
}
#ifdef USE_PLUG_BUF
buf = rb->plugin_get_buffer(&buf_size);
#else
decoder_buf = rb->plugin_get_buffer(&decoder_buf_size);
buf = rb->plugin_get_audio_buffer(&buf_size);
#endif
get_pic_list();
if(!entries) return PLUGIN_ERROR;
#ifdef USEGSLIB
if (!grey_init(buf, buf_size, GREY_ON_COP,
LCD_WIDTH, LCD_HEIGHT, &greysize))
{
rb->splash(HZ, "grey buf error");
return PLUGIN_ERROR;
}
buf += greysize;
buf_size -= greysize;
#endif
#ifdef USE_PLUG_BUF
decoder_buf = buf;
decoder_buf_size = buf_size;
if(!rb->audio_status())
{
iv_api.plug_buf = false;
buf = rb->plugin_get_audio_buffer(&buf_size);
}
#endif
/* should be ok to just load settings since the plugin itself has
just been loaded from disk and the drive should be spinning */
configfile_load(IMGVIEW_CONFIGFILE, config,
ARRAYLEN(config), IMGVIEW_SETTINGS_MINVERSION);
rb->memcpy(&old_settings, &settings, sizeof (settings));
#ifdef HAVE_BACKLIGHT
/* Turn off backlight timeout */
backlight_ignore_timeout();
#endif
#if LCD_DEPTH > 1
rb->lcd_set_backdrop(NULL);
rb->lcd_set_foreground(LCD_WHITE);
rb->lcd_set_background(LCD_BLACK);
#endif
do
{
condition = load_and_show(np_file, &image_info);
} while (condition >= PLUGIN_OTHER);
release_decoder();
if (rb->memcmp(&settings, &old_settings, sizeof (settings)))
{
/* Just in case drive has to spin, keep it from looking locked */
rb->splash(0, "Saving Settings");
configfile_save(IMGVIEW_CONFIGFILE, config,
ARRAYLEN(config), IMGVIEW_SETTINGS_VERSION);
}
#ifdef DISK_SPINDOWN
/* set back ata spindown time in case we changed it */
rb->storage_spindown(rb->global_settings->disk_spindown);
#endif
#ifdef HAVE_BACKLIGHT
/* Turn on backlight timeout (revert to settings) */
backlight_use_settings();
#endif
#ifdef USEGSLIB
grey_release(); /* deinitialize */
#endif
return condition;
}
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