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Refactor pipeline to use common 16-bit detection methods

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Lovell Fuller
2016-07-11 23:03:45 +01:00
parent d1d6155fd1
commit c42fb97419
4 changed files with 36 additions and 30 deletions
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21
src/common.cc
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@@ -317,23 +317,26 @@ namespace sharp {
return std::make_tuple(left, top);
}
/*
Are pixel values in this image 16-bit integer?
*/
bool Is16Bit(VipsInterpretation const interpretation) {
return interpretation == VIPS_INTERPRETATION_RGB16 || interpretation == VIPS_INTERPRETATION_GREY16;
}
/*
Return the image alpha maximum. Useful for combining alpha bands. scRGB
images are 0 - 1 for image data, but the alpha is 0 - 255.
*/
int MaximumImageAlpha(VipsInterpretation interpretation) {
if(interpretation == VIPS_INTERPRETATION_RGB16 ||
interpretation == VIPS_INTERPRETATION_GREY16) {
return (65535);
} else {
return (255);
}
double MaximumImageAlpha(VipsInterpretation const interpretation) {
return Is16Bit(interpretation) ? 65535.0 : 255.0;
}
/*
Get VIPS Boolean operatoin type from string
Get boolean operation type from string
*/
VipsOperationBoolean GetBooleanOperation(std::string opStr) {
VipsOperationBoolean GetBooleanOperation(std::string const opStr) {
return static_cast<VipsOperationBoolean>(
vips_enum_from_nick(nullptr, VIPS_TYPE_OPERATION_BOOLEAN, opStr.data())
);