Matrix_decomposeScale.cpp File Reference

#include "tools/fiddle/examples.h"

Go to the source code of this file.

Functions
	REG_FIDDLE (Matrix_decomposeScale, 256, 256, true, 0)

Function Documentation

REG_FIDDLE()

REG_FIDDLE	(	Matrix_decomposeScale	,
		256	,
		256	,
		true	,
		0
	)

Definition at line 5 of file Matrix_decomposeScale.cpp.

                                                     {
void draw(SkCanvas* canvas) {
    SkMatrix matrix;
    matrix.setRotate(90 * SK_Scalar1);
    matrix.postScale(1.f / 4, 1.f / 2);
    matrix.dump();
    SkSize scale = {SK_ScalarNaN, SK_ScalarNaN};
    SkMatrix remaining;
    remaining.reset();
    bool success = matrix.decomposeScale(&scale, &remaining);
    SkDebugf("success: %s  ", success ? "true" : "false");
    SkDebugf("scale: %g, %g\n", scale.width(), scale.height());
    remaining.dump();
    SkMatrix scaleMatrix = SkMatrix::Scale(scale.width(), scale.height());
    SkMatrix combined = SkMatrix::Concat(scaleMatrix, remaining);
    combined.dump();
}
}  // END FIDDLE