static void decode_new_frame(gs_image_file_t *image, int new_frame)
{
if (!image->animation_frame_cache[new_frame]) {
int last_frame;
/* if looped, decode frame 0 */
last_frame = (new_frame < image->last_decoded_frame) ?
0 : image->last_decoded_frame + 1;
/* decode missed frames */
for (int i = last_frame; i < new_frame; i++) {
if (gif_decode_frame(&image->gif, i) != GIF_OK)
return;
}
/* decode actual desired frame */
if (gif_decode_frame(&image->gif, new_frame) == GIF_OK) {
size_t pos = new_frame * image->gif.width *
image->gif.height * 4;
image->animation_frame_cache[new_frame] =
image->animation_frame_data + pos;
memcpy(image->animation_frame_cache[new_frame],
image->gif.frame_image,
image->gif.width *
image->gif.height * 4);
image->last_decoded_frame = new_frame;
}
}
image->cur_frame = new_frame;
}
/* gifReadImage: Reads an image from a memory buffer.
Returns: non-zero if successful.
*/
int gifReadImage(int w, int h, int d, char* bits, char *data, int nBytes) {
gif_bitmap_callback_vt bitmap_callbacks = {
bitmap_create,
bitmap_destroy,
bitmap_get_buffer,
bitmap_set_opaque,
bitmap_test_opaque,
bitmap_modified
};
gif_animation gif;
gif_result code;
formWidth = w;
formHeight = h;
formBits = bits;
/* create our gif animation */
gif_create(&gif, &bitmap_callbacks);
/* begin decoding */
do {
code = gif_initialise(&gif, nBytes, data);
if (code != GIF_OK && code != GIF_WORKING) {
DBG("gif_initialise failure");
return 0;
}
} while (code != GIF_OK);
if(gif.width != w || gif.height != h || gif.frame_count != 1 || d != 32) {
DBG("image format mismatch");
return 0;
}
code = gif_decode_frame(&gif, 0);
if (code != GIF_OK) {
DBG("gif_decode_frame error");
return 0;
}
/* clean up */
gif_finalise(&gif);
return 1;
}
/**
* Updates the GIF bitmap to display the current frame
*
* \param c the content to update
*/
static gif_result nsgif_get_frame(nsgif_content *gif)
{
int previous_frame, current_frame, frame;
gif_result res = GIF_OK;
current_frame = gif->current_frame;
if (!nsoption_bool(animate_images)) {
current_frame = 0;
}
if (current_frame < gif->gif->decoded_frame)
previous_frame = 0;
else
previous_frame = gif->gif->decoded_frame + 1;
for (frame = previous_frame; frame <= current_frame; frame++) {
res = gif_decode_frame(gif->gif, frame);
}
return res;
}
static bool init_animated_gif(gs_image_file_t *image, const char *path)
{
bool is_animated_gif = true;
gif_result result;
uint64_t max_size;
size_t size;
FILE *file;
image->bitmap_callbacks.bitmap_create = bi_def_bitmap_create;
image->bitmap_callbacks.bitmap_destroy = bi_def_bitmap_destroy;
image->bitmap_callbacks.bitmap_get_buffer = bi_def_bitmap_get_buffer;
image->bitmap_callbacks.bitmap_modified = bi_def_bitmap_modified;
image->bitmap_callbacks.bitmap_set_opaque = bi_def_bitmap_set_opaque;
image->bitmap_callbacks.bitmap_test_opaque = bi_def_bitmap_test_opaque;
gif_create(&image->gif, &image->bitmap_callbacks);
file = os_fopen(path, "rb");
if (!file) {
blog(LOG_WARNING, "Failed to open file '%s'", path);
goto fail;
}
fseek(file, 0, SEEK_END);
size = (size_t)os_ftelli64(file);
fseek(file, 0, SEEK_SET);
image->gif_data = bmalloc(size);
fread(image->gif_data, 1, size, file);
do {
result = gif_initialise(&image->gif, size, image->gif_data);
if (result < 0) {
blog(LOG_WARNING, "Failed to initialize gif '%s', "
"possible file corruption", path);
goto fail;
}
} while (result != GIF_OK);
if (image->gif.width > 4096 || image->gif.height > 4096) {
blog(LOG_WARNING, "Bad texture dimensions (%dx%d) in '%s'",
image->gif.width, image->gif.height, path);
goto fail;
}
max_size = (uint64_t)image->gif.width * (uint64_t)image->gif.height *
(uint64_t)image->gif.frame_count * 4LLU;
if ((uint64_t)get_full_decoded_gif_size(image) != max_size) {
blog(LOG_WARNING, "Gif '%s' overflowed maximum pointer size",
path);
goto fail;
}
image->is_animated_gif = (image->gif.frame_count > 1 && result >= 0);
if (image->is_animated_gif) {
gif_decode_frame(&image->gif, 0);
image->animation_frame_cache = bzalloc(
image->gif.frame_count * sizeof(uint8_t*));
image->animation_frame_data = bzalloc(
get_full_decoded_gif_size(image));
for (unsigned int i = 0; i < image->gif.frame_count; i++) {
if (gif_decode_frame(&image->gif, i) != GIF_OK)
blog(LOG_WARNING, "Couldn't decode frame %u "
"of '%s'", i, path);
}
gif_decode_frame(&image->gif, 0);
image->cx = (uint32_t)image->gif.width;
image->cy = (uint32_t)image->gif.height;
image->format = GS_RGBA;
} else {
gif_finalise(&image->gif);
bfree(image->gif_data);
image->gif_data = NULL;
is_animated_gif = false;
goto not_animated;
}
image->loaded = true;
fail:
if (!image->loaded)
gs_image_file_free(image);
not_animated:
if (file)
fclose(file);
return is_animated_gif;
}
_bitmap _imageFile::readBitmap( _optValue<_u32> page )
{
// Check if not-existing
if( !this->isExisting() )
return _bitmap();
_mimeType mimeType = this->getRealMime();
if( mimeType == _mime::image_png )
{
if( this->bufferedImage )
return *bufferedImage;
_bitmap result;
YsRawPngDecoder* pngDecoder = new YsRawPngDecoder;
pngDecoder->Decode( this->filename.c_str() );
if( pngDecoder->wid > 0 && pngDecoder->hei > 0 && pngDecoder->rgba != NULL )
{
// Allocate bitmap
result = _bitmap( pngDecoder->wid , pngDecoder->hei );
// Get size of Data (in bytes)(every pixel consists of u8 red, u8 green, u8 blue, u8 alpha)
_u32 size = pngDecoder->wid * pngDecoder->hei;
_pixelArray base = result.getBitmap();
_u8* source = pngDecoder->rgba;
do {
_u8 r = *source++;
_u8 g = *source++;
_u8 b = *source++;
bool a = *source++ > 127;
*base++ = _color::fromRGB8(r,g,b,a);
} while( --size > 0 );
}
// Delete the decoder
delete pngDecoder;
if( this->buffer ) {
this->bufferedImage = new _bitmap( move(result) );
return *this->bufferedImage;
}
return move(result);
}
else if( mimeType == _mime::image_jpeg )
{
if( this->bufferedImage )
return *bufferedImage;
_bitmap result;
_u32 size = this->getSize();
_byte* data = new _byte[size];
this->read( data , size );
Jpeg::Decoder* jpgDecoder = new Jpeg::Decoder( data , size );
if ( jpgDecoder->GetResult() == Jpeg::Decoder::OK )
{
result = _bitmap( jpgDecoder->GetWidth() , jpgDecoder->GetHeight() );
if( jpgDecoder->IsColor() )
{
_u32 size = jpgDecoder->GetImageSize();
_u8* rgb = jpgDecoder->GetImage();
_pixelArray dest = result.getBitmap();
do {
_u8 r = *rgb++;
_u8 g = *rgb++;
_u8 b = *rgb++;
*dest++ = _color::fromRGB8(r,g,b);
size -= 3;
} while( size > 0 );
}
else
{
_u32 size = jpgDecoder->GetImageSize();
_u8* rgb = jpgDecoder->GetImage();
_pixelArray dest = result.getBitmap();
do {
*dest++ = _color::fromBW8( *rgb++ );
} while( --size > 0 );
}
}
delete[] data;
delete jpgDecoder;
if( this->buffer ) {
this->bufferedImage = new _bitmap( move(result) );
return *this->bufferedImage;
}
return move(result);
}
else if( mimeType == _mime::image_bmp )
{
if( this->bufferedImage )
return *bufferedImage;
_bitmap result;
_u32 size = this->getSize();
_byte* data = new _byte[size];
this->read( data , size );
_u32 width;
_u32 height;
_pixelArray pixeldata = GenericBMPDecoder::decode( data , size , width , height );
if ( pixeldata != nullptr ) {
result = _bitmap( width , height );
memcpy16( result.getBitmap() , pixeldata , width * height );
delete[] pixeldata;
}
delete[] data;
if( this->buffer ) {
this->bufferedImage = new _bitmap( move(result) );
return *this->bufferedImage;
}
return move(result);
}
else if( mimeType == _mime::image_ico )
{
_byte* data;
if( this->bufferedData )
data = this->bufferedData;
else
{
_u32 size = this->getSize();
data = new _byte[size];
this->read( data , size );
}
_u32 width;
_u32 height;
_bitmap result;
_u8* pixeldata = GenericIcoDecoder::decode( data , width , height , page );
if ( pixeldata != nullptr )
{
// Allocate bitmap
result = _bitmap( width , height );
// Get size of Data (in bytes)(every pixel consists of u8 red, u8 green, u8 blue, u8 alpha)
_u32 size = width * height;
_pixelArray base = result.getBitmap();
_u8* source = pixeldata;
do {
_u8 r = *source++;
_u8 g = *source++;
_u8 b = *source++;
bool a = *source++ > 127;
*base++ = _color::fromRGB8(r,g,b,a);
} while( --size > 0 );
delete[] pixeldata;
}
if( !this->buffer )
delete[] data;
else
this->bufferedData = data;
return result;
}
else if( mimeType == _mime::image_gif )
{
gif_animation* gifAnim;
gif_result statusCode = GIF_OK;
// Allocate Decoder
if( this->bufferedGif )
gifAnim = this->bufferedGif;
else
{
// Read file content to buffer
_u32 size = this->getSize();
_byte* data = new _byte[size];
this->read( data , size );
// Allocate Decoder
gifAnim = new gif_animation;
// Initialize Decoder
gif_create( gifAnim );
// Partly Decode the gif
do {
statusCode = gif_initialise( gifAnim , size , data );
if (statusCode != GIF_OK && statusCode != GIF_WORKING) {
_imageFile::outputGifWarning( "gif_initialise" , statusCode);
break;
}
} while( statusCode != GIF_OK );
}
if( !this->bufferedGifBitmap )
this->bufferedGifBitmap = new _bitmap( gifAnim->width , gifAnim->height , _color::transparent );
// Limit Page Number
if( gifAnim->frame_count <= page )
page = gifAnim->frame_count -1;
// Decode...
statusCode = gif_decode_frame(gifAnim, page);
// ... and Check if everything went ok
if (statusCode != GIF_OK)
_imageFile::outputGifWarning( "gif_decode_frame" , statusCode );
// Get destination bitmap
_pixelArray dest = this->bufferedGifBitmap->getBitmap();
// Get Source bitmap
_u8* source = (_u8*)gifAnim->frame_image;
// Copy source bitmap to destination
_length numPixels = gifAnim->height * gifAnim->width;
do {
*dest++ = _color::fromRGB8( source[0] , source[1] , source[2] , source[3] );
source += 4;
} while( --numPixels > 0 );
// Clean temps
if( this->buffer )
this->bufferedGif = gifAnim;
else
{
delete[] gifAnim->gif_data;
delete gifAnim;
}
return *this->bufferedGifBitmap;
}
return _bitmap();
}
int main(int argc, char *argv[])
{
gif_bitmap_callback_vt bitmap_callbacks = {
bitmap_create,
bitmap_destroy,
bitmap_get_buffer,
bitmap_set_opaque,
bitmap_test_opaque,
bitmap_modified
};
gif_animation gif;
size_t size;
gif_result code;
unsigned int i;
if (argc != 2) {
fprintf(stderr, "Usage: %s image.gif\n", argv[0]);
return 1;
}
/* create our gif animation */
gif_create(&gif, &bitmap_callbacks);
/* load file into memory */
unsigned char *data = load_file(argv[1], &size);
/* begin decoding */
do {
code = gif_initialise(&gif, size, data);
if (code != GIF_OK && code != GIF_WORKING) {
warning("gif_initialise", code);
exit(1);
}
} while (code != GIF_OK);
printf("P3\n");
printf("# %s\n", argv[1]);
printf("# width %u \n", gif.width);
printf("# height %u \n", gif.height);
printf("# frame_count %u \n", gif.frame_count);
printf("# frame_count_partial %u \n", gif.frame_count_partial);
printf("# loop_count %u \n", gif.loop_count);
printf("%u %u 256\n", gif.width, gif.height * gif.frame_count);
/* decode the frames */
for (i = 0; i != gif.frame_count; i++) {
unsigned int row, col;
unsigned char *image;
code = gif_decode_frame(&gif, i);
if (code != GIF_OK)
warning("gif_decode_frame", code);
printf("# frame %u:\n", i);
image = (unsigned char *) gif.frame_image;
for (row = 0; row != gif.height; row++) {
for (col = 0; col != gif.width; col++) {
size_t z = (row * gif.width + col) * 4;
printf("%u %u %u ",
(unsigned char) image[z],
(unsigned char) image[z + 1],
(unsigned char) image[z + 2]);
}
printf("\n");
}
}
/* clean up */
gif_finalise(&gif);
free(data);
return 0;
}