/* Loads PNG using libpng */
static TLN_Bitmap LoadPNG (char *filename)
{
png_image image;
TLN_Bitmap bitmap = NULL;
/* Only the image structure version number needs to be set. */
memset (&image, 0, sizeof image);
image.version = PNG_IMAGE_VERSION;
if (png_image_begin_read_from_file (&image, filename))
{
int src_line_size = image.width * PNG_IMAGE_PIXEL_SIZE(image.format);
int lut_size = PNG_IMAGE_COLORMAP_SIZE(image);
BYTE* data = malloc (src_line_size * image.height);
BYTE* lut = malloc (lut_size);
bitmap = TLN_CreateBitmap (image.width, image.height, PNG_IMAGE_PIXEL_SIZE(image.format)<<3);
/* Change this to try different formats! If you set a colormap format
* then you must also supply a colormap below.
*/
image.format = PNG_FORMAT_RGB_COLORMAP;
if (png_image_finish_read (&image, NULL, data, 0, lut))
{
BYTE *src, *dst;
unsigned int c;
png_image_free (&image);
/* copy scanlines */
src = data;
for (c=0; c<image.height; c++)
{
dst = TLN_GetBitmapPtr (bitmap, 0, c);
memcpy (dst, src, src_line_size);
src += src_line_size;
}
/* get palette */
{
BYTE *src = lut;
png_uint_32 c;
TLN_Palette palette;
palette = TLN_CreatePalette (image.colormap_entries);
for (c=0; c<image.colormap_entries; c++)
{
TLN_SetPaletteColor (palette, c, src[0], src[1], src[2]);
src += 3;
}
TLN_SetBitmapPalette (bitmap, palette);
}
}
free (lut);
free (data);
}
return bitmap;
}
JNIEXPORT jboolean JNICALL Java_Tilengine_SetBitmapPalette (JNIEnv* env, jobject thisobj, jint bitmap, jint palette)
{
return TLN_SetBitmapPalette ((TLN_Bitmap)bitmap, (TLN_Palette)palette);
}
/* loads BMP */
static TLN_Bitmap LoadBMP (char *filename)
{
BITMAPFILEHEADER bfh;
BITMAPV5HEADER bv5;
DWORD StructSize;
FILE* pf;
TLN_Bitmap bitmap = NULL;
unsigned int c;
int pitch;
/* open file */
pf = fopen (filename, "rb");
if (!pf)
return NULL;
/* read BMP header */
fread (&bfh, sizeof(bfh), 1, pf);
if (bfh.Type != 0x4D42)
{
fclose (pf);
return NULL;
}
/* load info structure */
memset (&bv5, 0, sizeof(bv5));
fread (&StructSize, 4, 1, pf);
fseek (pf, sizeof(bfh), SEEK_SET);
fread (&bv5, StructSize, 1, pf);
/* create */
bitmap = TLN_CreateBitmap (bv5.bV5Width, bv5.bV5Height, bv5.bV5BitCount);
if (!bitmap)
{
fclose (pf);
return NULL;
}
/* load scanlines */
pitch = TLN_GetBitmapPitch (bitmap);
fseek (pf, bfh.OffsetData, SEEK_SET);
for (c=0; c<bv5.bV5Height; c++)
{
BYTE* line = TLN_GetBitmapPtr (bitmap, 0, bv5.bV5Height - c - 1);
fread (line, pitch, 1, pf);
}
/* load palette */
if (bv5.bV5BitCount == 8)
{
TLN_Palette palette;
/* HACK: some editors don't set the bV5ClrUsed field, compute from size */
if (bv5.bV5ClrUsed == 0)
bv5.bV5ClrUsed = (bfh.OffsetData - sizeof(bfh) - bv5.bV5Size) / sizeof(RGBQUAD);
fseek (pf, sizeof(BITMAPFILEHEADER) + bv5.bV5Size, SEEK_SET);
palette = TLN_CreatePalette (bv5.bV5ClrUsed);
for (c=0; c<(int)bv5.bV5ClrUsed; c++)
{
RGBQUAD color;
fread (&color, sizeof(RGBQUAD), 1, pf);
TLN_SetPaletteColor (palette, c, color.r, color.g, color.b);
}
TLN_SetBitmapPalette (bitmap, palette);
}
fclose (pf);
return bitmap;
}
