Re: [Lcd4linux-devel] Gif widget

[Scott F. <sc...@st...>]

/* $Id: widget_gif.c 1035 2009-05-19 10:42:01Z michael $
 * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/widget_gif.c $
 *
 * gif widget handling
 *
 * Copyright (C) 2003, 2004 Michael Reinelt <mi...@re...>
 * Copyright (C) 2004 The LCD4Linux Team <lcd...@us...>
 *
 * 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, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/*
 * exported functions:
 *
 * WIDGET_CLASS Widget_Gif
 *   the gif widget
 *
 */


#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <FreeImage.h>

#include "debug.h"
#include "cfg.h"
#include "qprintf.h"
#include "property.h"
#include "timer.h"
#include "rgb.h"
#include "widget.h"
#include "widget_gif.h"

#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif

extern int XRES, YRES;

void widget_gif_update(void *Self)
{
    WIDGET *W = (WIDGET *) Self;
    WIDGET_GIF *Gif = W->data;
    BYTE pixel;
    int row, col;


    FIBITMAP *dib, *dib2;

    if(W->parent == NULL) {
        dib = FreeImage_LockPage(Gif->image, Gif->pagePtr);
        
        if (!dib) {
            error("Unable to lock gif page: %s", W->name);
            return;
        }

        dib2 = FreeImage_ConvertTo8Bits(dib);
        memset(Gif->bitmap, 0, Gif->width * Gif->height * sizeof(RGBA));
    
        for(row = Gif->ypoint; row < Gif->ypoint + Gif->height; row++) {
            for(col = Gif->xpoint; col < Gif->xpoint + Gif->width; col++) {
                if( FreeImage_GetPixelIndex(dib2, col, row, &pixel) ) {
        	        if((int)pixel != Gif->background && (int)pixel != Gif->transparent) {
			//	error("pixel %d, r: %d, g: %d, b: %d", pixel, Gif->palette[pixel].rgbRed, Gif->palette[pixel].rgbGreen, Gif->palette[pixel].rgbBlue );
                	    Gif->bitmap[(Gif->height-row-1) * Gif->width + col].R = Gif->palette[pixel].rgbRed;
	                    Gif->bitmap[(Gif->height-row-1) * Gif->width + col].G = Gif->palette[pixel].rgbGreen;
        	            Gif->bitmap[(Gif->height-row-1) * Gif->width + col].B = Gif->palette[pixel].rgbBlue;
                            Gif->bitmap[(Gif->height-row-1) * Gif->width + col].A = 255;
                	}
		}
            }
        }
        
        FreeImage_UnlockPage(Gif->image, dib, FALSE);
        Gif->pagePtr++;
        if( Gif->pagePtr > Gif->end) {
            Gif->pagePtr = Gif->start;
        }

        property_eval(&Gif->visible);
    } 


    /* finally, draw it! */
    if (W->class->draw)
        W->class->draw(W);

}



int widget_gif_init(WIDGET * Self)
{
    char *section, *file;
    int i;

    /* prepare config section */
    /* strlen("Widget:")=7 */
    RGBQUAD bkcolor;
    WIDGET_GIF *Gif;
    FIBITMAP *dib2;

    section = malloc(strlen(Self->name) + 8);
    strcpy(section, "Widget:");
    strcat(section, Self->name);

    Gif = malloc(sizeof(WIDGET_GIF));
    memset(Gif, 0, sizeof(WIDGET_GIF));

    /* load properties */
    property_load(section, "update", "200", &Gif->update);
    property_load(section, "visible", "1", &Gif->visible);

    property_eval(&Gif->update);
    
    if (Self->parent == NULL) {
        file = cfg_get(section, "file", NULL);
        if( file == NULL ) {
            error("You must specify a gif file: %s", Self->name);
            return 0;
        }
    
        Gif->image = FreeImage_OpenMultiBitmap(FIF_GIF, file, FALSE, TRUE, FALSE, GIF_PLAYBACK);;
    
        Gif->lastFrame = FreeImage_GetPageCount(Gif->image) - 1;
        FIBITMAP *dib = FreeImage_LockPage(Gif->image, 0);
        if( !dib ) {
            error("Unable to iterate gif: %s", Self->name);
    	    return 0;
        }
    
        dib2 = FreeImage_ConvertTo8Bits(dib);
        FreeImage_GetBackgroundColor(dib2, &bkcolor);
        Gif->background = (&bkcolor)->rgbReserved;
        Gif->transparent = FreeImage_GetTransparentIndex(dib2);
        Gif->palette = FreeImage_GetPalette(dib2);
    
        cfg_number(section, "start", 0, 0, Gif->lastFrame, &Gif->start);
        cfg_number(section, "end", Gif->lastFrame, 0, Gif->lastFrame, &Gif->end);
        cfg_number(section, "width", -1, 0, -1, &Gif->width);
        cfg_number(section, "height", -1, 0, -1, &Gif->height);
        cfg_number(section, "xpoint", 0, 0, Gif->width - 1, &Gif->xpoint);
        cfg_number(section, "ypoint", 0, 0, Gif->height - 1, &Gif->ypoint);
    
        Gif->pagePtr = Gif->start;
        
        if( Gif->height == -1 ) {
            Gif->height = FreeImage_GetHeight(dib2);
        }
    
        if( Gif->width == -1 ) {
            Gif->width = FreeImage_GetWidth(dib2);
        }
        
        FreeImage_UnlockPage(Gif->image, dib, FALSE);
    
        free(section);
        Self->data = Gif;
        Self->x2 = Self->col + Gif->width / XRES - 1;
        Self->y2 = Self->row + Gif->height / YRES - 1;
    
        /* reset ascii  */
        for(i = 0; i < Gif->width / XRES * Gif->height / YRES; i++) {
            Gif->ascii[i] = -1;
        }
    
        Gif->bitmap = malloc(Gif->width * Gif->height * sizeof(RGBA));
    } else {
        Gif = Self->data = Self->parent->data;
        Self->x2 = Self->col + Gif->width / XRES - 1;
        Self->y2 = Self->row + Gif->height / YRES - 1;
    }

    /* just do it! */
    timer_add(widget_gif_update, Self, P2N(&Gif->update), 0);

    return 0;
}


int widget_gif_quit(WIDGET * Self)
{
    if (Self) {
        if (Self->parent == NULL ) {
            if (Self->data) {
                WIDGET_GIF *Gif = Self->data;
                property_free(&Gif->update);
                property_free(&Gif->visible);
                if (Gif->bitmap)
                    free(Gif->bitmap);
                if (Gif->image)
                    FreeImage_CloseMultiBitmap(Gif->image, GIF_PLAYBACK);
                free(Self->data);
                Self->data = NULL;
            }
        }
    }

    return 0;

}



WIDGET_CLASS Widget_Gif = {
    .name = "gif",
    .type = WIDGET_TYPE_RC,
    .init = widget_gif_init,
    .draw = NULL,
    .quit = widget_gif_quit,
};