TexturePtr SpriteManager::getSpriteTexture(int id)
{
if(id == 0)
return g_graphics.getEmptyTexture();
assert(id > 0 && id <= m_spritesCount);
// load sprites on demand
TexturePtr& sprite = m_sprites[id-1];
if(!sprite)
sprite = loadSpriteTexture(id);
//TODO: release unused sprites textures after X seconds
// to avoid massive texture allocations
return sprite;
}
bool loadSpriteFromPNG (const char * file, struct spriteBank *sprites, int index)
{
if (sprites->type<2) {
char * error = joinStrings(file, "\n\nPNG files currently not supported in palette mode. Change to 32-bit mode and try again.");
errorBox ("Can't open PNG file", error);
delete error;
return false;
}
// Open the file
FILE * fp = fopen (file, "rb");
if (fp == NULL) {
char * error = joinStrings(file, "\n\nThe file can't be opened. I don't know why.");
errorBox ("Can't open PNG file", error);
delete error;
return false;
}
char tmp[10];
size_t bytes_read = fread(tmp, 1, 8, fp);
if (bytes_read != 8 && ferror (fp)) {
fprintf(stderr, "Reading error in loadSpriteFromPNG.\n");
}
if (png_sig_cmp((png_byte *) tmp, 0, 8)) {
fclose (fp);
char * error = joinStrings(file, "\n\nIt doesn't appear to be a valid PNG image.");
errorBox ("Can't open PNG file", error);
delete error;
return false;
}
png_structp png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
fclose (fp);
char * error = joinStrings(file, "\n\nError reading the file.");
errorBox ("Can't open PNG file", error);
delete error;
return false;
}
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr) {
png_destroy_read_struct(&png_ptr, (png_infopp) NULL, (png_infopp) NULL);
fclose (fp);
char * error = joinStrings(file, "\n\nError reading the file.");
errorBox ("Can't open PNG file", error);
delete error;
return false;
}
png_infop end_info = png_create_info_struct(png_ptr);
if (!end_info) {
png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
fclose (fp);
char * error = joinStrings(file, "\n\nError readin the file");
return errorBox ("Can't open PNG file", error);
}
png_init_io(png_ptr, fp); // Tell libpng which file to read
png_set_sig_bytes(png_ptr, 8); // 8 bytes already read
png_read_info(png_ptr, info_ptr);
png_uint_32 width, height;
int bit_depth, color_type, interlace_type, compression_type, filter_method;
png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, &compression_type, &filter_method);
if (bit_depth < 8) png_set_packing(png_ptr);
png_set_expand(png_ptr);
if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA) png_set_gray_to_rgb(png_ptr);
if (bit_depth == 16) png_set_strip_16(png_ptr);
png_set_add_alpha(png_ptr, 0xff, PNG_FILLER_AFTER);
png_read_update_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, &compression_type, &filter_method);
int rowbytes = png_get_rowbytes(png_ptr, info_ptr);
unsigned char * row_pointers[height];
unsigned char * data = new unsigned char [rowbytes*height];
for (int i = 0; i<height; i++)
row_pointers[i] = data + i*rowbytes;
png_read_image(png_ptr, (png_byte **) row_pointers);
png_read_end(png_ptr, NULL);
png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
fclose (fp);
if (sprites->sprites[index].data) delete sprites->sprites[index].data;
sprites->sprites[index].data = data;
sprites->sprites[index].width = width;
sprites->sprites[index].height = height;
int n, r, g, b;
for (int x=0; x<width;x++) {
for (int y=0; y<height; y++) {
if (! sprites->sprites[index].data[4*width*y + x*4 + 3]) {
n = r = g = b = 0;
if (x>0 && sprites->sprites[index].data[4*width*y + (x-1)*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*y + (x-1)*4];
g+= sprites->sprites[index].data[4*width*y + (x-1)*4+1];
b+= sprites->sprites[index].data[4*width*y + (x-1)*4+2];
}
if (x<width-1 && sprites->sprites[index].data[4*width*y + (x+1)*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*y + (x+1)*4];
g+= sprites->sprites[index].data[4*width*y + (x+1)*4+1];
b+= sprites->sprites[index].data[4*width*y + (x+1)*4+2];
}
if (y>0 && sprites->sprites[index].data[4*width*(y-1) + x*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*(y-1) + x*4];
g+= sprites->sprites[index].data[4*width*(y-1) + x*4+1];
b+= sprites->sprites[index].data[4*width*(y-1) + x*4+2];
}
if (y<height-1 && sprites->sprites[index].data[4*width*(y+1) + x*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*(y+1) + x*4];
g+= sprites->sprites[index].data[4*width*(y+1) + x*4+1];
b+= sprites->sprites[index].data[4*width*(y+1) + x*4+2];
}
if (n) {
r /= n;
g /= n;
b /= n;
sprites->sprites[index].data[4*width*y + x*4]=r;
sprites->sprites[index].data[4*width*y + x*4+1]=g;
sprites->sprites[index].data[4*width*y + x*4+2]=b;
}
}
}
}
loadSpriteTexture (sprites, index);
return true;
}
bool loadSpriteFromTGA (const char * file, struct spriteBank *sprites, int index)
{
palCol thePalette[256];
// Open the file
FILE * fp = fopen (file, "rb");
if (fp == NULL) {
char * error = joinStrings(file, "\n\nThe file can't be opened. I don't know why.");
errorBox ("Can't open TGA file", error);
delete error;
return false;
}
// Grab the header
TGAHeader imageHeader;
const char * errorBack;
errorBack = readTGAHeader (imageHeader, fp, thePalette);
if (errorBack) {
fclose (fp);
char * error = joinStrings(file, "\n\n", errorBack);
errorBox ("Can't open TGA file", error);
delete error;
return false;
}
unsigned char *data;
if (sprites->type < 2) {
data = new unsigned char[imageHeader.height * imageHeader.width];
if (! data) {
fclose (fp);
errorBox ("Can't create sprite", "Out of memory.");
return false;
}
unsigned char palSize = sprites->myPalette.total;
unsigned char r,g,b;
int c;
for (int t2 = imageHeader.height-1; t2>=0; t2 --) {
for (int t1 = 0; t1 < imageHeader.width; t1 ++) {
if (! imageHeader.compressed) {
grabRGB (fp, imageHeader.pixelDepth, r, g, b, thePalette);
} else {
grabRGBCompressed (fp, imageHeader.pixelDepth, r, g, b, thePalette);
}
if (sprites->type == 1)
data[t2*imageHeader.width+t1] = findClosestPal (&sprites->myPalette, r, g, b);
else {
if ((c = findOrAddPal (&sprites->myPalette, r, g, b)) < 0) {
fclose(fp);
errorBox ("Can't create sprite", "The sprite bank palette doesn't have enough room left to add the colours. Change the palette mode to locked or 32-bit and try again.");
sprites->myPalette.total = palSize;
delete data;
return false;
}
data[t2*imageHeader.width+t1] = c;
}
}
}
} else {
data = new unsigned char[imageHeader.height * imageHeader.width * 4];
if (! data) {
fclose (fp);
errorBox ("Can't create sprite", "Out of memory.");
return false;
}
unsigned char r,g,b,a;
fprintf (stderr, "Compressed: %d (%d)\n", imageHeader.compressed, imageHeader.pixelDepth);
for (int t2 = imageHeader.height-1; t2>=0; t2 --) {
for (int t1 = 0; t1 < imageHeader.width; t1 ++) {
if (! imageHeader.compressed) {
grabRGBA (fp, imageHeader.pixelDepth, r, g, b, a, thePalette);
} else {
grabRGBACompressed (fp, imageHeader.pixelDepth, r, g, b, a, thePalette);
}
data[t2*imageHeader.width*4+t1*4] = r;
data[t2*imageHeader.width*4+t1*4+1] = g;
data[t2*imageHeader.width*4+t1*4+2] = b;
data[t2*imageHeader.width*4+t1*4+3] = a;
}
}
}
fclose (fp);
if (sprites->sprites[index].data) delete sprites->sprites[index].data;
sprites->sprites[index].data = data;
sprites->sprites[index].width = imageHeader.width;
sprites->sprites[index].height = imageHeader.height;
if (sprites->type>=2) {
int n, r, g, b;
int width = imageHeader.width;
int height = imageHeader.height;
for (int x=0; x<width;x++) {
for (int y=0; y<height; y++) {
if (! sprites->sprites[index].data[4*width*y + x*4 + 3]) {
n = r = g = b = 0;
if (x>0 && sprites->sprites[index].data[4*width*y + (x-1)*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*y + (x-1)*4];
g+= sprites->sprites[index].data[4*width*y + (x-1)*4+1];
b+= sprites->sprites[index].data[4*width*y + (x-1)*4+2];
}
if (x<width-1 && sprites->sprites[index].data[4*width*y + (x+1)*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*y + (x+1)*4];
g+= sprites->sprites[index].data[4*width*y + (x+1)*4+1];
b+= sprites->sprites[index].data[4*width*y + (x+1)*4+2];
}
if (y>0 && sprites->sprites[index].data[4*width*(y-1) + x*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*(y-1) + x*4];
g+= sprites->sprites[index].data[4*width*(y-1) + x*4+1];
b+= sprites->sprites[index].data[4*width*(y-1) + x*4+2];
}
if (y<height-1 && sprites->sprites[index].data[4*width*(y+1) + x*4 + 3]) {
n++;
r+= sprites->sprites[index].data[4*width*(y+1) + x*4];
g+= sprites->sprites[index].data[4*width*(y+1) + x*4+1];
b+= sprites->sprites[index].data[4*width*(y+1) + x*4+2];
}
if (n) {
r /= n;
g /= n;
b /= n;
sprites->sprites[index].data[4*width*y + x*4]=r;
sprites->sprites[index].data[4*width*y + x*4+1]=g;
sprites->sprites[index].data[4*width*y + x*4+2]=b;
}
}
}
}
}
loadSpriteTexture (sprites, index);
return true;
}