VALUE rb_graffik_cropped_thumbnail(VALUE self, VALUE rb_size) {
// Convert the Ruby numbers to C numbers
int size = FIX2INT(rb_size);
// Load our image
FIBITMAP *image = get_instance_image(self);
// Get dimensions
int width = FreeImage_GetWidth(image), height = FreeImage_GetHeight(image);
int left = 0, top = 0, right = width, bottom = height;
int half = (width - height) / 2;
if (width > height) {
left = half;
right = half + height;
}
if (height > width) {
top = half;
bottom = half + width;
}
// Crop the image
FIBITMAP *cropped = FreeImage_Copy(image, left, top, right, bottom);
// Resize the image
FIBITMAP *thumbnail = FreeImage_MakeThumbnail(cropped, size, TRUE);
// Create a new instance for Ruby
VALUE instance = Data_Wrap_Struct(CLASS_OF(self), NULL, NULL, thumbnail);
rb_iv_set(instance, "@file_type", rb_iv_get(self, "@file_type"));
// If a block is given, yield to it, if not, return the instance
if (rb_block_given_p()) {
return rb_ensure(rb_yield, instance, rb_graffik_close, instance);
} else {
return instance;
}
}
HBITMAP BmpFilterLoadBitmap(BOOL *bIsTransparent, const wchar_t *ptszFilename)
{
FIBITMAP *dib = (FIBITMAP*)Image_Load(ptszFilename, IMGL_RETURNDIB);
if (dib == nullptr)
return nullptr;
FIBITMAP *dib32 = nullptr;
if (FreeImage_GetBPP(dib) != 32) {
dib32 = FreeImage_ConvertTo32Bits(dib);
FreeImage_Unload(dib);
}
else dib32 = dib;
if (dib32 == nullptr)
return nullptr;
if (FreeImage_IsTransparent(dib32))
if (bIsTransparent)
*bIsTransparent = TRUE;
if (FreeImage_GetWidth(dib32) > 128 || FreeImage_GetHeight(dib32) > 128) {
FIBITMAP *dib_new = FreeImage_MakeThumbnail(dib32, 128, FALSE);
FreeImage_Unload(dib32);
if (dib_new == nullptr)
return nullptr;
dib32 = dib_new;
}
HBITMAP bitmap = FreeImage_CreateHBITMAPFromDIB(dib32);
FreeImage_Unload(dib32);
FreeImage_CorrectBitmap32Alpha(bitmap, FALSE);
return bitmap;
}
VALUE rb_graffik_thumbnail(VALUE self, VALUE rb_size) {
// Convert the Ruby numbers to C numbers
int size = FIX2INT(rb_size);
// Load our image
FIBITMAP *image = get_instance_image(self);
// Resize the image
FIBITMAP *thumbnail = FreeImage_MakeThumbnail(image, size, TRUE);
// Create a new instance for Ruby
VALUE instance = Data_Wrap_Struct(CLASS_OF(self), NULL, NULL, thumbnail);
rb_iv_set(instance, "@file_type", rb_iv_get(self, "@file_type"));
// If a block is given, yield to it, if not, return the instance
if (rb_block_given_p()) {
return rb_ensure(rb_yield, instance, rb_graffik_close, instance);
} else {
return instance;
}
}
BOOL fipImage::makeThumbnail(WORD max_size, BOOL convert) {
if(_dib) {
switch(FreeImage_GetImageType(_dib)) {
case FIT_BITMAP:
case FIT_UINT16:
case FIT_RGB16:
case FIT_RGBA16:
case FIT_FLOAT:
case FIT_RGBF:
case FIT_RGBAF:
break;
default:
return FALSE;
break;
}
// Perform downsampling
FIBITMAP *dst = FreeImage_MakeThumbnail(_dib, max_size, convert);
return replace(dst);
}
return FALSE;
}
