mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-13 07:31:00 -05:00
127 lines
No EOL
3 KiB
C++
127 lines
No EOL
3 KiB
C++
#include "GIFLoader.h"
|
|
#include "api__gif.h"
|
|
#include <wchar.h>
|
|
#include <bfc/platform/strcmp.h>
|
|
|
|
extern "C" {
|
|
#include "../giflib/gif_lib.h"
|
|
};
|
|
|
|
static bool StringEnds(const wchar_t *a, const wchar_t *b)
|
|
{
|
|
size_t aLen = wcslen(a);
|
|
size_t bLen = wcslen(b);
|
|
if (aLen < bLen) return false; // too short
|
|
return !_wcsicmp(a + aLen - bLen, b);
|
|
}
|
|
|
|
int GIFLoader::isMine(const wchar_t *filename)
|
|
{
|
|
return (filename && StringEnds(filename, L".GIF"));
|
|
}
|
|
|
|
int GIFLoader::getHeaderSize()
|
|
{
|
|
return 3;
|
|
}
|
|
|
|
const wchar_t *GIFLoader::mimeType()
|
|
{
|
|
return L"image/gif";
|
|
}
|
|
|
|
int GIFLoader::testData(const void *data, int datalen)
|
|
{
|
|
if(datalen >= 3 && strncmp((const char*)data,"GIF",3)==0) return 1;
|
|
return 0;
|
|
}
|
|
|
|
typedef struct {
|
|
BYTE * data;
|
|
int len;
|
|
} readStruct;
|
|
|
|
extern "C" int myreader(GifFileType *gif, GifByteType *data, int len) {
|
|
readStruct* r = (readStruct*)gif->UserData;
|
|
int l = min(len,r->len);
|
|
if(l == 0) return 0;
|
|
memcpy(data,r->data,l);
|
|
r->len -= l;
|
|
r->data += l;
|
|
return l;
|
|
}
|
|
|
|
ARGB32 *GIFLoader::loadImage(const void *datain, int datalen, int *w, int *h, ifc_xmlreaderparams *params)
|
|
{
|
|
readStruct read = {(BYTE*)datain,datalen};
|
|
int* l_error = NULL;
|
|
GifFileType * gif = DGifOpen(&read, myreader, l_error);
|
|
if(!gif) return 0;
|
|
|
|
if(!DGifSlurp(gif) || !gif->ImageCount) { DGifCloseFile(gif, l_error); return 0; }
|
|
|
|
ColorMapObject *map = gif->SColorMap;
|
|
if(!map) map = gif->SavedImages[0].ImageDesc.ColorMap;
|
|
if(!map) { DGifCloseFile(gif, l_error); return 0; }
|
|
int iw = gif->SavedImages[0].ImageDesc.Width;
|
|
int ih = gif->SavedImages[0].ImageDesc.Height;
|
|
if(w) *w = iw;
|
|
if(h) *h = ih;
|
|
|
|
ARGB32 * data = (ARGB32 *)WASABI_API_MEMMGR->sysMalloc(iw * ih * sizeof(ARGB32));
|
|
ARGB32 * p = data;
|
|
ARGB32 * end = data + (iw * ih);
|
|
|
|
GifPixelType *line = gif->SavedImages[0].RasterBits;
|
|
|
|
|
|
if(gif->SavedImages[0].ImageDesc.Interlace)
|
|
{
|
|
// The way Interlaced image should be read - offsets and jumps...
|
|
const int InterlacedOffset[] = { 0, 4, 2, 1 };
|
|
const int InterlacedJumps[] = { 8, 8, 4, 2 };
|
|
|
|
for(int i = 0; i < 4; i++)
|
|
{
|
|
for(int j = InterlacedOffset[i]; j < ih; j += InterlacedJumps[i])
|
|
{
|
|
p = &data[j*iw];
|
|
for(int k = 0; k<iw; k++)
|
|
{
|
|
int px = *(line++);
|
|
if(px < map->ColorCount && (px != gif->SBackGroundColor || px == 0)) {
|
|
GifColorType& color = map->Colors[px];
|
|
*(p++) = 0xff000000 | color.Blue | (color.Green << 8) | (color.Red << 16);
|
|
} else
|
|
*(p++) = 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while(p < end) {
|
|
int px = *(line++);
|
|
if(px < map->ColorCount && (px != gif->SBackGroundColor || px == 0)) {
|
|
GifColorType& color = map->Colors[px];
|
|
*(p++) = 0xff000000 | color.Blue | (color.Green << 8) | (color.Red << 16);
|
|
} else
|
|
*(p++) = 0;
|
|
}
|
|
}
|
|
|
|
DGifCloseFile(gif, l_error);
|
|
return data;
|
|
}
|
|
|
|
#define CBCLASS GIFLoader
|
|
START_DISPATCH;
|
|
CB(ISMINE, isMine);
|
|
CB(MIMETYPE, mimeType);
|
|
CB(TESTDATA, testData);
|
|
CB(GETHEADERSIZE, getHeaderSize);
|
|
CB(GETDIMENSIONS, getDimensions);
|
|
CB(LOADIMAGE, loadImage);
|
|
CB(LOADIMAGEDATA, loadImageData);
|
|
END_DISPATCH;
|
|
#undef CBCLASS |