/* $Id: fb_imlib2.c,v 1.5 2002/07/18 15:14:21 ukai Exp $ */
/**************************************************************************
                fb_imlib2.c 0.2 Copyright (C) 2002, hito
 **************************************************************************/

#include "fb.h"
#include "fb_img.h"

static void set_prm(IMAGE * img);

IMAGE *
fb_load_image(char *filename, int w, int h)
{
    Imlib_Image image;
    IMAGE *img;

    if (filename == NULL)
	return NULL;

    img = malloc(sizeof(*img));
    if (img == NULL)
	return NULL;

    image = imlib_load_image(filename);
    if (image == NULL) {
	free(img);
	return NULL;
    }

    imlib_context_set_image(image);

    img->image = image;
    set_prm(img);

    fb_resize_image(img, w, h);

    return img;
}

int
fb_draw_image(IMAGE * img, int x, int y, int sx, int sy, int width, int height)
{
    int i, j, r, g, b, a = 0, offset;

    if (img == NULL)
	return 1;

    for (j = sy; j < sy + height && j < img->height; j++) {
	offset = j * img->width;
	for (i = sx; i < sx + width && i < img->width; i++) {
	    a = (img->data[offset + i] >> 24) & 0x000000ff;
	    r = (img->data[offset + i] >> 16) & 0x000000ff;
	    g = (img->data[offset + i] >> 8) & 0x000000ff;
	    b = (img->data[offset + i]) & 0x000000ff;

	    if (a == 0)
		fb_pset(i + x - sx, j + y - sy, bg_r, bg_g, bg_b);
	    else
		fb_pset(i + x - sx, j + y - sy, r, g, b);
	}
    }
    return 0;
}

int
fb_resize_image(IMAGE * img, int width, int height)
{
    Imlib_Image image;

    if (width < 1 || height < 1 || img == NULL)
	return 1;

    if (width == img->width && height == img->height)
	return 0;

    image =
	imlib_create_cropped_scaled_image(0, 0, img->width, img->height, width,
					  height);
    if (image == NULL)
	return 1;

    imlib_context_set_image(img->image);
    imlib_free_image();

    img->image = image;
    set_prm(img);
    return 0;
}

void
fb_free_image(IMAGE * img)
{
    if (img == NULL)
	return;

    imlib_context_set_image(img->image);
    imlib_free_image();
    free(img);
}

IMAGE *
fb_dup_image(IMAGE * img)
{
    Imlib_Image image;
    IMAGE *new_img;

    if (img == NULL)
	return NULL;

    new_img = malloc(sizeof(*img));
    if (new_img == NULL)
	return NULL;

    imlib_context_set_image(img->image);
    image = imlib_clone_image();

    if (image == NULL) {
	free(new_img);
	return NULL;
    }

    new_img->image = image;
    set_prm(new_img);
    return new_img;
}

int
fb_rotate_image(IMAGE * img, int angle)
{
    int orientation;

    if (img == NULL)
	return 1;

    imlib_context_set_image(img->image);

    if (angle == 90) {
	orientation = 1;
    }
    else if (angle == -90) {
	orientation = 3;
    }
    else {
	return 1;
    }

    imlib_image_orientate(orientation);
    set_prm(img);
    return 0;
}

static void
set_prm(IMAGE * img)
{
    if (img == NULL)
	return;

    imlib_context_set_image(img->image);
    img->data = imlib_image_get_data_for_reading_only();
    img->width = imlib_image_get_width();
    img->height = imlib_image_get_height();
}