image.c

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/*
 * Crossfire -- cooperative multi-player graphical RPG and adventure game
 *
 * Copyright (c) 1999-2013 Mark Wedel and the Crossfire Development Team
 * Copyright (c) 1992 Frank Tore Johansen
 *
 * Crossfire is free software and comes with ABSOLUTELY NO WARRANTY. You are
 * welcome to redistribute it under certain conditions. For details, see the
 * 'LICENSE' and 'COPYING' files.
 *
 * The authors can be reached via e-mail to crossfire-devel@real-time.com
 */
 
#include "client.h"
 
#include <gtk/gtk.h>
 
#include "image.h"
#include "main.h"
#include "gtk2proto.h"
 
extern GtkWidget *window_root; 
int image_size=DEFAULT_IMAGE_SIZE;
 
#define BPP 4
 
PixmapInfo *pixmaps[MAXPIXMAPNUM];
 
/* Do we have new images to display? */
int have_new_image=0;
 
/*
 * this is used to rescale big images that will be drawn in the inventory/look
 * lists.  What the code further below basically does is figure out how big the
 * object is (in squares), and this looks at the icon_rescale_factor to figure
 * what scale factor it gives.  Not that the icon_rescale_factor values are
 * passed directly to the rescale routines.  These represent percentages - so
 * even taking into account that the values diminish as the table grows, they
 * will still appear larger if the location in the table times the factor is
 * greater than 100.  We find the largest dimension that the image has.  The
 * values in the comment is the effective scaling compared to the base image
 * size that this big image will appear as.  Using a table makes it easier to
 * adjust the values so things look right.
 */
 
#define MAX_ICON_SPACES     10
static const int icon_rescale_factor[MAX_ICON_SPACES] = {
    100, 100,           80 /* 2 = 160 */,   60 /* 3 = 180 */,
    50 /* 4 = 200 */,   45 /* 5 = 225 */,   40 /* 6 = 240 */,
    35 /* 7 = 259 */,   35 /* 8 = 280 */,   33 /* 9 = 300 */
};
 
/******************************************************************************
 *
 * Code related to face caching.
 *
 *****************************************************************************/
 
/* Does not appear to be used anywhere
typedef struct Keys {
    uint8       flags;
    sint8       direction;
    KeySym      keysym;
    char        *command;
    struct Keys *next;
} Key_Entry;
*/
 
/* Rotate right from bsd sum. */
#define ROTATE_RIGHT(c) if ((c) & 01) (c) = ((c) >>1) + 0x80000000; else (c) >>= 1;
 
/*#define CHECKSUM_DEBUG*/
 
static void create_icon_image(guint8 *data, PixmapInfo *pi) {
    pi->icon_image = rgba_to_gdkpixbuf(data, pi->icon_width, pi->icon_height);
}
 
static void create_full_icon_image(guint8 *data, PixmapInfo *pi) {
    pi->full_icon_image = rgba_to_gdkpixbuf(data, pi->full_icon_width, pi->full_icon_height);
}
 
static void create_map_image(guint8 *data, PixmapInfo *pi) {
    pi->map_image = rgba_to_cairo_surface(data, pi->full_icon_width, pi->full_icon_height);
}
 
void do_new_image(guint8 *data, PixmapInfo *pi) {
    create_icon_image(data, pi);
    create_full_icon_image(data, pi);
    create_map_image(data, pi);
}
 
static void free_pixmap(PixmapInfo *pi)
{
    if (pi->icon_image) {
        g_object_unref(pi->icon_image);
    }
    if (pi->full_icon_image) {
        g_object_unref(pi->full_icon_image);
    }
    if (pi->map_image) {
        cairo_surface_destroy(pi->map_image);
    }
}
 
int create_and_rescale_image_from_data(Cache_Entry *ce, int pixmap_num,
        guint8 *rgba_data, int width, int height) {
    int nx, ny, iscale, factor;
    PixmapInfo  *pi;
 
    if (pixmap_num <= 0 || pixmap_num >= MAXPIXMAPNUM) {
        return 1;
    }
 
    if (pixmaps[pixmap_num] != pixmaps[0]) {
        /* As per bug 2938906, one can see image corruption when switching between
         * servers.  The cause is that the cache table stores away
         * a pointer to the pixmap[] entry - if we go and free it,
         * the cache table can point to garbage, so don't free it.
         * This causes some memory leak, but if/when there is good
         * cache support for multiple servers, eventually the amount
         * of memory consumed will reach a limit (it has every image of
         * every server in memory
         *
         * The cause of image corruption requires a few different things:
         * 1) images of the same name have different numbers on the 2 serves.
         * 2) the image number is higher on the first than second server
         * 3) the image using the high number does not exist/is different
         *    on the second server, causing this routine to be called.
         */
 
        if (!use_config[CONFIG_CACHE]) {
            free_pixmap(pixmaps[pixmap_num]);
            free(pixmaps[pixmap_num]);
        }
        pixmaps[pixmap_num] = pixmaps[0];
    }
 
    pi = calloc(1, sizeof(PixmapInfo));
 
    iscale = use_config[CONFIG_ICONSCALE];
 
    /*
     * If the image is big, figure out what we should scale it to so it fits
     * better display
     */
    if (width > DEFAULT_IMAGE_SIZE || height>DEFAULT_IMAGE_SIZE) {
        int ts = 100;
 
        factor = width / DEFAULT_IMAGE_SIZE;
        if (factor >= MAX_ICON_SPACES) {
            factor = MAX_ICON_SPACES - 1;
        }
        if (icon_rescale_factor[factor] < ts) {
            ts = icon_rescale_factor[factor];
        }
 
        factor = height / DEFAULT_IMAGE_SIZE;
        if (factor >= MAX_ICON_SPACES) {
            factor = MAX_ICON_SPACES - 1;
        }
        if (icon_rescale_factor[factor] < ts) {
            ts = icon_rescale_factor[factor];
        }
 
        iscale = ts * use_config[CONFIG_ICONSCALE] / 100;
    }
 
    /* In all cases, the icon images are in native form. */
    pi->full_icon_width = width;
    pi->full_icon_height = height;
    create_full_icon_image(rgba_data, pi);
    if (iscale != 100) {
        nx=width;
        ny=height;
        guint8 *png_tmp = rescale_rgba_data(rgba_data, &nx, &ny, iscale);
        pi->icon_width = nx;
        pi->icon_height = ny;
        create_icon_image(png_tmp, pi);
        free(png_tmp);
    } else {
        pi->icon_width = width;
        pi->icon_height = height;
        create_icon_image(rgba_data, pi);
    }
 
    create_map_image(rgba_data, pi);
    /*
     * Not ideal, but if it is missing the map or icon image, presume something
     * failed.  However, opengl doesn't set the map_image, so if using that
     * display mode, don't make this check.
     */
    if (!pi->icon_image || (!pi->map_image && use_config[CONFIG_DISPLAYMODE]!=CFG_DM_OPENGL)) {
        free_pixmap(pi);
        free(pi);
        return 1;
    }
    if (ce) {
        ce->image_data = pi;
    }
    pixmaps[pixmap_num] = pi;
    if (use_config[CONFIG_CACHE]) {
        have_new_image++;
    }
 
    return 0;
}
 
void addsmooth(guint16 face, guint16 smooth_face)
{
    pixmaps[face]->smooth_face = smooth_face;
}
 
int associate_cache_entry(Cache_Entry *ce, int pixnum)
{
    pixmaps[pixnum] = ce->image_data;
    return 0;
}
 
void reset_image_data(void)
{
    int i;
 
    reset_image_cache_data();
    /*
     * The entries in the pixmaps array are also tracked in the image cache in
     * the common area.  We will try to recycle those images that we can.
     * Thus, if we connect to a new server, we can just re-use the images we
     * have already rendered.
     */
    for (i=1; i<MAXPIXMAPNUM; i++) {
        if (!want_config[CONFIG_CACHE] && pixmaps[i] != pixmaps[0]) {
            free_pixmap(pixmaps[i]);
            free(pixmaps[i]);
            pixmaps[i] = pixmaps[0];
        }
    }
}
 
static GtkWidget *pbar, *pbar_window;
 
void image_update_download_status(int start, int end, int total) {
    int x, y, wx, wy, w, h;
 
    if (start == 1) {
        pbar = gtk_progress_bar_new();
        get_window_coord(window_root, &x,&y, &wx,&wy,&w,&h);
 
        pbar_window = gtk_window_new(GTK_WINDOW_POPUP);
        gtk_window_set_transient_for(GTK_WINDOW(pbar_window), GTK_WINDOW (window_root));
 
        gtk_container_add(GTK_CONTAINER(pbar_window), pbar);
        gtk_widget_show(pbar);
        gtk_widget_show(pbar_window);
    } else if (start == total) {
        gtk_widget_destroy(pbar_window);
        pbar = NULL;
        pbar_window = NULL;
        return;
    }
 
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pbar), (float)start / end);
    while (gtk_events_pending()) {
        gtk_main_iteration();
    }
}
 
void get_map_image_size(int face, guint8 *w, guint8 *h)
{
    /* We want to calculate the number of spaces this image
     * uses it.  By adding the image size but substracting one,
     * we cover the cases where the image size is not an even
     * increment.  EG, if the map_image_size is 32, and an image
     * is 33 wide, we want that to register as two spaces.  By
     * adding 31, that works out.
     */
    if ( face < 0 || face >= MAXPIXMAPNUM) {
        *w = 1;
        *h = 1;
    } else {
        int scaled_image_size;
        if (use_config[CONFIG_DISPLAYMODE] == CFG_DM_PIXMAP) {
            scaled_image_size = map_image_size;
        } else {
            scaled_image_size = map_image_size * use_config[CONFIG_MAPSCALE] / 100;
        }
        *w = (pixmaps[face]->full_icon_width + scaled_image_size - 1)/ scaled_image_size;
        *h = (pixmaps[face]->full_icon_height + scaled_image_size - 1)/ scaled_image_size;
    }
}
 
/******************************************************************************
 *
 * Code related to face caching.
 *
 *****************************************************************************/
 
void init_image_cache_data(void)
{
#include "../../pixmaps/question.xpm"
    pixmaps[0] = g_new(PixmapInfo, 1);
    pixmaps[0]->icon_image =
        gdk_pixbuf_new_from_xpm_data((const gchar **)question_xpm);
    pixmaps[0]->full_icon_image =
        gdk_pixbuf_new_from_xpm_data((const gchar **)question_xpm);
    pixmaps[0]->map_image =  pixmaps[0]->icon_image;
 
    pixmaps[0]->icon_width = pixmaps[0]->icon_height = pixmaps[0]->full_icon_width = pixmaps[0]->full_icon_height = map_image_size;
    pixmaps[0]->smooth_face = 0;
 
    /* Initialize all the images to be of the same value. */
    for (int i = 1; i < MAXPIXMAPNUM; i++) {
        pixmaps[i] = pixmaps[0];
    }
 
    init_common_cache_data();
}