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Commit f27256b9 authored by Leon Scroggins III's avatar Leon Scroggins III
Browse files

Add AImageDecoder_computeSampledSize 

Bug: 135133301
Test: If9ed79d8dcf1169369ba454723f4ac8d26427b7b

This allows an NDK client to find an efficient target size to use.

Change-Id: Iabc3db1547d4863f9aa0324bc438d994eadeef01
parent 46bb0aec

include/android/imagedecoder.h

+22 −0
Original line number Diff line number Diff line
@@ -179,6 +179,28 @@ int AImageDecoder_setUnpremultipliedRequired(AImageDecoder*, bool required) __IN 
 */

int AImageDecoder_setTargetSize(AImageDecoder*, int width, int height) __INTRODUCED_IN(30);





/**

 * Compute the dimensions to use for a given sampleSize.

 *

 * Although AImageDecoder can scale to an arbitrary target size (see

 * {@link AImageDecoder_setTargetSize}), some sizes may be more efficient than

 * others. This computes the most efficient target size to use to reach a

 * particular sampleSize.

 *

 * @param sampleSize A subsampling rate of the original image. Must be greater

 *                   than or equal to 1. A sampleSize of 2 means to skip every

 *                   other pixel/line, resulting in a width and height that are

 *                   1/2 of the original dimensions, with 1/4 the number of

 *                   pixels.

 * @param width Out parameter for the width sampled by sampleSize, and rounded

 *              direction that the decoder can do most efficiently.

 * @param height Out parameter for the height sampled by sampleSize, and rounded

 *               direction that the decoder can do most efficiently.

 * @return ANDROID_IMAGE_DECODER result code.

 */

int AImageDecoder_computeSampledSize(const AImageDecoder*, int sampleSize,

                                     int* width, int* height) __INTRODUCED_IN(30);

/**

 * Specify how to crop the output after scaling (if any).

 *