public static artwork artwork_load_size(string filename, int start_pen, int max_pens, int width, int height)
{
osd_bitmap picture = null;
artwork a = null;
png_info p=new png_info();
/* If the user turned artwork off, bail */
if (!options.use_artwork) return null;
if ((a = allocate_artwork_mem(width, height)) == null)
return null;
a.start_pen = start_pen;
if (artwork_read_bitmap(filename, ref picture, ref p) == 0)
{
artwork_free(ref a);
return null;
}
a.num_pens_used = (int)p.num_palette;
a.num_pens_trans = (int)p.num_trans;
a.orig_palette = p.palette;
a.transparency = p.trans;
/* Make sure we don't have too many colors */
if (a.num_pens_used > max_pens)
{
printf("Too many colors in overlay.\n");
printf("Colors found: %d Max Allowed: %d\n", a.num_pens_used, max_pens);
artwork_free(ref a);
osd_free_bitmap(picture);
return null;
}
/* Scale the original picture to be the same size as the visible area */
if ((Machine.orientation & ORIENTATION_SWAP_XY) != 0)
copybitmapzoom(a.orig_artwork, picture, false, false, 0, 0,
null, TRANSPARENCY_NONE, 0,
(a.orig_artwork.height << 16) / picture.height,
(a.orig_artwork.width << 16) / picture.width);
else
copybitmapzoom(a.orig_artwork, picture, false, false, 0, 0,
null, TRANSPARENCY_NONE, 0,
(a.orig_artwork.width << 16) / picture.width,
(a.orig_artwork.height << 16) / picture.height);
/* If the game uses dynamic colors, we assume that it's safe
to init the palette and remap the colors now */
if ((Machine.drv.video_attributes & VIDEO_MODIFIES_PALETTE) != 0)
backdrop_set_palette(a, a.orig_palette);
/* We don't need the original any more */
osd_free_bitmap(picture);
return a;
}
static int artwork_read_bitmap(string file_name, ref osd_bitmap bitmap, ref png_info p)
{
uint orientation;
uint x, y;
object fp;
if ((fp = osd_fopen(Machine.gamedrv.name, file_name, OSD_FILETYPE_ARTWORK, 0)) == null)
{
printf("Unable to open PNG %s\n", file_name);
return 0;
}
if (png_read_file(fp, p) == 0)
{
osd_fclose(fp);
return 0;
}
osd_fclose(fp);
if (p.bit_depth > 8)
{
printf("Unsupported bit depth %i (8 bit max.)\n", p.bit_depth);
return 0;
}
if (p.color_type != 3)
{
printf("Unsupported color type %i (has to be 3)\n", p.color_type);
return 0;
}
if (p.interlace_method != 0)
{
printf("Interlace unsupported\n");
return 0;
}
/* Convert to 8 bit */
png_expand_buffer_8bit(p);
png_delete_unused_colors(p);
if ((bitmap = osd_create_bitmap((int)p.width, (int)p.height)) == null)
{
printf("Unable to allocate memory for artwork\n");
return 0;
}
orientation = (uint)Machine.orientation;
int tmp = 0;//p.image;
for (y = 0; y < p.height; y++)
for (x = 0; x < p.width; x++)
{
plot_pixel(bitmap, (int)x, (int)y, p.image[tmp++]);
}
p.image = null;
return 1;
}
static void png_delete_unused_colors(png_info p)
{
throw new Exception();
}
static int png_expand_buffer_8bit(png_info p)
{
throw new Exception();
}
static int png_read_file(object fp, png_info p)
{
throw new Exception();
}
