__declspec(dllexport) bool LoadImage(const char *file, unsigned int maxwidth, unsigned int maxheight, ImageInfo *info)
{
if (!file || !info) return false;
if (IsDir(file))
return false;
// load the image
DWORD dwImageType = GetImageType(file);
CxImage *image = new CxImage(dwImageType);
if (!image) return false;
int actualwidth = maxwidth;
int actualheight = maxheight;
try
{
if (!image->Load(file, dwImageType, actualwidth, actualheight) || !image->IsValid())
{
#if !defined(_LINUX) && !defined(__APPLE__)
int nErr = GetLastError();
#else
int nErr = errno;
#endif
printf("PICTURE::LoadImage: Unable to open image: %s Error:%s (%d)\n", file, image->GetLastError(),nErr);
delete image;
return false;
}
}
catch (...)
{
printf("PICTURE::LoadImage: Unable to open image: %s\n", file);
delete image;
return false;
}
// ok, now resample the image down if necessary
if (ResampleKeepAspect(*image, maxwidth, maxheight) < 0)
{
printf("PICTURE::LoadImage: Unable to resample picture: %s\n", file);
delete image;
return false;
}
// make sure our image is 24bit minimum
image->IncreaseBpp(24);
// fill in our struct
info->width = image->GetWidth();
info->height = image->GetHeight();
info->originalwidth = actualwidth;
info->originalheight = actualheight;
memcpy(&info->exifInfo, image->GetExifInfo(), sizeof(EXIFINFO));
// create our texture
info->context = image;
info->texture = image->GetBits();
info->alpha = image->AlphaGetBits();
return (info->texture != NULL);
};
int ResampleKeepAspectArea(CxImage &image, unsigned int area)
{
float fAspect = ((float)image.GetWidth()) / ((float)image.GetHeight());
unsigned int width = (unsigned int)sqrt(area * fAspect);
unsigned int height = (unsigned int)sqrt(area / fAspect);
if (width > MAX_WIDTH) width = MAX_WIDTH;
if (height > MAX_HEIGHT) height = MAX_HEIGHT;
return ResampleKeepAspect(image, width, height, true);
}
__declspec(dllexport) bool CreateFolderThumbnail(const char **file, const char *thumb, int maxWidth, int maxHeight)
{
if (!file || !file[0] || !file[1] || !file[2] || !file[3] || !thumb) return false;
CxImage folderimage(maxWidth, maxHeight, 32, CXIMAGE_FORMAT_PNG);
folderimage.AlphaCreate();
int iWidth = maxWidth / 2;
int iHeight = maxHeight / 2;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
int width = iWidth;
int height = iHeight;
bool bBlank = false;
if (strlen(file[i*2 + j]) == 0)
bBlank = true;
if (!bBlank)
{
CxImage image;
if (image.Load(file[i*2 + j], CXIMAGE_FORMAT_JPG, width, height))
{
// resize image to iWidth
if (ResampleKeepAspect(image, iWidth - 2, iHeight - 2) >= 0)
{
int iOffX = (iWidth - 2 - image.GetWidth()) / 2;
int iOffY = (iHeight - 2 - image.GetHeight()) / 2;
for (int x = 0; x < iWidth; x++)
{
for (int y = 0; y < iHeight; y++)
{
RGBQUAD rgb;
if (x < iOffX || x >= iOffX + (int)image.GetWidth() || y < iOffY || y >= iOffY + (int)image.GetHeight())
{
rgb.rgbBlue = 0; rgb.rgbGreen = 0; rgb.rgbRed = 0; rgb.rgbReserved = 0;
}
else
{
rgb = image.GetPixelColor(x - iOffX, y - iOffY);
rgb.rgbReserved = 255;
}
folderimage.SetPixelColor(x + j*iWidth, y + (1 - i)*iHeight, rgb, true);
}
}
}
else
bBlank = true;
}
else
bBlank = true;
}
if (bBlank)
{ // no image - just fill with black alpha
for (int x = 0; x < iWidth; x++)
{
for (int y = 0; y < iHeight; y++)
{
RGBQUAD rgb;
rgb.rgbBlue = 0; rgb.rgbGreen = 0; rgb.rgbRed = 0; rgb.rgbReserved = 0;
folderimage.SetPixelColor(x + j*iWidth, y + (1 - i)*iHeight, rgb, true);
}
}
}
}
}
::DeleteFile(thumb);
if (!folderimage.Save(thumb, CXIMAGE_FORMAT_PNG))
{
printf("Unable to save thumb file");
::DeleteFile(thumb);
return false;
}
return true;
};
__declspec(dllexport) bool LoadImageFromMemory(const BYTE *buffer, unsigned int size, const char *mime, unsigned int maxwidth, unsigned int maxheight, ImageInfo *info)
{
if (!buffer || !size || !mime || !info) return false;
// load the image
DWORD dwImageType = CXIMAGE_FORMAT_UNKNOWN;
if (strlen(mime))
dwImageType = GetImageType(mime);
if (dwImageType == CXIMAGE_FORMAT_UNKNOWN)
dwImageType = DetectFileType(buffer, size);
if (dwImageType == CXIMAGE_FORMAT_UNKNOWN)
{
printf("PICTURE::LoadImageFromMemory: Unable to determine image type.");
return false;
}
CxImage *image = new CxImage(dwImageType);
if (!image)
return false;
int actualwidth = maxwidth;
int actualheight = maxheight;
try
{
bool success = image->Decode((BYTE*)buffer, size, dwImageType, actualwidth, actualheight);
if (!success && dwImageType != CXIMAGE_FORMAT_UNKNOWN)
{ // try to decode with unknown imagetype
success = image->Decode((BYTE*)buffer, size, CXIMAGE_FORMAT_UNKNOWN);
}
if (!success || !image->IsValid())
{
printf("PICTURE::LoadImageFromMemory: Unable to decode image. Error:%s\n", image->GetLastError());
delete image;
return false;
}
}
catch (...)
{
printf("PICTURE::LoadImageFromMemory: Unable to decode image.");
delete image;
return false;
}
// ok, now resample the image down if necessary
if (ResampleKeepAspect(*image, maxwidth, maxheight) < 0)
{
printf("PICTURE::LoadImage: Unable to resample picture\n");
delete image;
return false;
}
// make sure our image is 24bit minimum
image->IncreaseBpp(24);
// fill in our struct
info->width = image->GetWidth();
info->height = image->GetHeight();
info->originalwidth = actualwidth;
info->originalheight = actualheight;
memcpy(&info->exifInfo, image->GetExifInfo(), sizeof(EXIFINFO));
// create our texture
info->context = image;
info->texture = image->GetBits();
info->alpha = image->AlphaGetBits();
return (info->texture != NULL);
};