BitmapRegionDecoderPriv.h File Reference

#include "include/core/SkRect.h"

Go to the source code of this file.

Enumerations
enum	SubsetType { kFullyInside_SubsetType , kPartiallyInside_SubsetType , kOutside_SubsetType }

Functions
SubsetType	adjust_subset_rect (const SkISize &imageDims, SkIRect *subset, int *outX, int *outY)

Enumeration Type Documentation

SubsetType

enum SubsetType

Enumerator
kFullyInside_SubsetType
kPartiallyInside_SubsetType
kOutside_SubsetType

Definition at line 13 of file BitmapRegionDecoderPriv.h.

                {
    kFullyInside_SubsetType,
    kPartiallyInside_SubsetType,
    kOutside_SubsetType,
};

Function Documentation

adjust_subset_rect()

SubsetType adjust_subset_rect ( const SkISize &  imageDims, SkIRect *  subset, int *  outX, int *  outY  )

inline

Definition at line 35 of file BitmapRegionDecoderPriv.h.

                   {
    // These must be at least zero, we can't start decoding the image at a negative coordinate.
    int left = std::max(0, subset->fLeft);
    int top = std::max(0, subset->fTop);
 
    // If input offsets are less than zero, we decode to an offset location in the output bitmap.
    *outX = left - subset->fLeft;
    *outY = top - subset->fTop;
 
    // Make sure we don't decode pixels past the edge of the image or past the edge of the subset.
    int width = std::min(imageDims.width() - left, subset->width() - *outX);
    int height = std::min(imageDims.height() - top, subset->height() - *outY);
    if (width <= 0 || height <= 0) {
        return SubsetType::kOutside_SubsetType;
    }
 
    subset->setXYWH(left, top, width, height);
    if ((*outX != 0) || (*outY != 0) || (width != subset->width()) ||
            (height != subset->height())) {
        return SubsetType::kPartiallyInside_SubsetType;
    }
 
    return SubsetType::kFullyInside_SubsetType;
}