зеркало из https://github.com/mozilla/moz-skia.git
240 строки
6.7 KiB
C++
240 строки
6.7 KiB
C++
#include "SampleCode.h"
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#include "SkCanvas.h"
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#include "SkPaint.h"
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#include "SkView.h"
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#include "SkLayer.h"
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#include "SkMatrix44.h"
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static void test_inv(const char label[], const SkMatrix44& mat) {
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SkDebugf("%s\n", label);
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mat.dump();
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SkMatrix44 inv;
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if (mat.invert(&inv)) {
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inv.dump();
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} else {
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SkDebugf("--- invert failed\n");
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}
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SkMatrix44 a, b;
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a.setConcat(mat, inv);
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b.setConcat(inv, mat);
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SkDebugf("concat mat with inverse pre=%d post=%d\n", a.isIdentity(), b.isIdentity());
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if (!a.isIdentity()) {
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a.dump();
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}
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if (!b.isIdentity()) {
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b.dump();
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}
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SkDebugf("\n");
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}
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static void test_map(SkScalar x0, SkScalar y0, SkScalar z0,
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const SkMatrix44& mat,
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SkScalar x1, SkScalar y1, SkScalar z1) {
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SkVector4 src, dst;
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src.set(x0, y0, z0);
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dst = mat * src;
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SkDebugf("map: src: %g %g %g dst: %g %g %g (%g) expected: %g %g %g match: %d\n",
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x0, y0, z0,
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dst.fData[0], dst.fData[1], dst.fData[2], dst.fData[3],
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x1, y1, z1,
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dst.fData[0] == x1 && dst.fData[1] == y1 && dst.fData[2] == z1);
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}
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static void test_33(const SkMatrix44& mat,
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SkScalar x0, SkScalar x1, SkScalar x2,
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SkScalar y0, SkScalar y1, SkScalar y2) {
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SkMatrix dst = mat;
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if (dst[0] != x0 || dst[1] != x1 || dst[2] != x2 ||
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dst[3] != y0 || dst[4] != y1 || dst[5] != y2) {
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SkString str;
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dst.toDumpString(&str);
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SkDebugf("3x3: expected 3x3 [%g %g %g] [%g %g %g] bug got %s\n",
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x0, x1, x2, y0, y1, y2, str.c_str());
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}
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}
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static void test44() {
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SkMatrix44 m0, m1, m2;
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test_inv("identity", m0);
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m0.setTranslate(2,3,4);
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test_inv("translate", m0);
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m0.setScale(2,3,4);
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test_inv("scale", m0);
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m0.postTranslate(5, 6, 7);
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test_inv("postTranslate", m0);
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m0.setScale(2,3,4);
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m1.setTranslate(5, 6, 7);
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m0.setConcat(m0, m1);
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test_inv("postTranslate2", m0);
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m0.setScale(2,3,4);
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m0.preTranslate(5, 6, 7);
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test_inv("preTranslate", m0);
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m0.setScale(2, 4, 6);
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m0.postScale(SkDoubleToMScalar(0.5));
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test_inv("scale/postscale to 1,2,3", m0);
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m0.reset();
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test_map(1, 0, 0, m0, 1, 0, 0);
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test_map(0, 1, 0, m0, 0, 1, 0);
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test_map(0, 0, 1, m0, 0, 0, 1);
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m0.setScale(2, 3, 4);
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test_map(1, 0, 0, m0, 2, 0, 0);
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test_map(0, 1, 0, m0, 0, 3, 0);
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test_map(0, 0, 1, m0, 0, 0, 4);
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m0.setTranslate(2, 3, 4);
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test_map(0, 0, 0, m0, 2, 3, 4);
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m0.preScale(5, 6, 7);
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test_map(1, 0, 0, m0, 7, 3, 4);
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test_map(0, 1, 0, m0, 2, 9, 4);
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test_map(0, 0, 1, m0, 2, 3, 11);
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SkMScalar deg = 45;
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m0.setRotateDegreesAbout(0, 0, 1, deg);
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test_map(1, 0, 0, m0, 0.707106769, -0.707106769, 0);
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m0.reset();
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test_33(m0, 1, 0, 0, 0, 1, 0);
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m0.setTranslate(3, 4, 5);
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test_33(m0, 1, 0, 3, 0, 1, 4);
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}
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///////////////////////////////////////////////////////////////////////////////
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static void dump_layers(const SkLayer* layer, int tab = 0) {
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SkMatrix matrix;
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SkString matrixStr;
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layer->getLocalTransform(&matrix);
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matrix.toDumpString(&matrixStr);
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for (int j = 0; j < tab; j++) {
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SkDebugf(" ");
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}
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SkDebugf("layer=%p parent=%p size=[%g %g] transform=%s\n",
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layer, layer->getParent(), layer->getWidth(), layer->getHeight(),
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matrixStr.c_str());
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for (int i = 0; i < layer->countChildren(); i++) {
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dump_layers(layer->getChild(i), tab + 4);
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}
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}
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class TestLayer : public SkLayer {
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public:
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TestLayer(SkColor c) : fColor(c) {}
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protected:
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virtual void onDraw(SkCanvas* canvas, SkScalar opacity) {
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SkRect r;
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r.set(0, 0, this->getWidth(), this->getHeight());
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SkPaint paint;
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paint.setColor(fColor);
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paint.setAlpha(SkScalarRound(opacity * 255));
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canvas->drawRect(r, paint);
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}
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private:
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SkColor fColor;
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};
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class SkLayerView : public SkView {
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private:
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SkLayer* fRootLayer;
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SkLayer* fLastChild;
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public:
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SkLayerView() {
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test44();
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static const int W = 600;
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static const int H = 440;
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static const struct {
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int fWidth;
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int fHeight;
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SkColor fColor;
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int fPosX;
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int fPosY;
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} gData[] = {
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{ 120, 80, SK_ColorRED, 0, 0 },
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{ 120, 80, SK_ColorGREEN, W - 120, 0 },
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{ 120, 80, SK_ColorBLUE, 0, H - 80 },
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{ 120, 80, SK_ColorMAGENTA, W - 120, H - 80 },
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};
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fRootLayer = new TestLayer(0xFFDDDDDD);
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fRootLayer->setSize(W, H);
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for (size_t i = 0; i < SK_ARRAY_COUNT(gData); i++) {
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SkLayer* child = new TestLayer(gData[i].fColor);
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child->setSize(gData[i].fWidth, gData[i].fHeight);
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child->setPosition(gData[i].fPosX, gData[i].fPosY);
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fRootLayer->addChild(child)->unref();
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}
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SkLayer* child = new TestLayer(0xFFDD8844);
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child->setSize(120, 80);
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child->setPosition(fRootLayer->getWidth()/2 - child->getWidth()/2,
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fRootLayer->getHeight()/2 - child->getHeight()/2);
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child->setAnchorPoint(SK_ScalarHalf, SK_ScalarHalf);
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{
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SkMatrix m;
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m.setRotate(SkIntToScalar(30));
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child->setMatrix(m);
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}
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fLastChild = child;
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fRootLayer->addChild(child)->unref();
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if (false) {
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SkMatrix matrix;
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matrix.setScale(0.5, 0.5);
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fRootLayer->setMatrix(matrix);
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}
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// dump_layers(fRootLayer);
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}
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virtual ~SkLayerView() {
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SkSafeUnref(fRootLayer);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "SkLayer");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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virtual void onDraw(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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canvas->translate(20, 20);
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fRootLayer->draw(canvas);
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// visual test of getLocalTransform
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if (true) {
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SkMatrix matrix;
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fLastChild->localToGlobal(&matrix);
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(5);
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paint.setColor(0x88FF0000);
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canvas->concat(matrix);
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canvas->drawRect(SkRect::MakeSize(fLastChild->getSize()), paint);
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}
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}
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private:
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typedef SkView INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new SkLayerView; }
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static SkViewRegister reg(MyFactory);
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