зеркало из https://github.com/mozilla/moz-skia.git
add sample for mipmaps
git-svn-id: http://skia.googlecode.com/svn/trunk@218 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@android.com
Родитель
31d1c64bd5
Коммит
ad687ceae2
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@ -0,0 +1,136 @@
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#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkDevice.h"
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#include "SkPaint.h"
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static SkBitmap createBitmap(int n) {
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SkBitmap bitmap;
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bitmap.setConfig(SkBitmap::kARGB_8888_Config, n, n);
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bitmap.allocPixels();
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bitmap.eraseColor(0);
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SkCanvas canvas(bitmap);
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SkRect r;
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r.set(0, 0, SkIntToScalar(n), SkIntToScalar(n));
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorRED);
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canvas.drawOval(r, paint);
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paint.setColor(SK_ColorBLUE);
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paint.setStrokeWidth(SkIntToScalar(n)/15);
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paint.setStyle(SkPaint::kStroke_Style);
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canvas.drawLine(0, 0, r.fRight, r.fBottom, paint);
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canvas.drawLine(0, r.fBottom, r.fRight, 0, paint);
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return bitmap;
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}
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class MipMapView : public SkView {
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SkBitmap fBitmap;
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enum {
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N = 128
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};
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public:
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MipMapView() {
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fBitmap = createBitmap(N);
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fWidth = N;
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fDW = -1;
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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, "MapMaps");
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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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void drawN(SkCanvas* canvas, const SkBitmap& bitmap) {
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SkAutoCanvasRestore acr(canvas, true);
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for (int i = N; i > 1; i >>= 1) {
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canvas->drawBitmap(bitmap, 0, 0, NULL);
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canvas->translate(SkIntToScalar(N + 8), 0);
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canvas->scale(SK_ScalarHalf, SK_ScalarHalf);
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}
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}
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void drawN2(SkCanvas* canvas, const SkBitmap& bitmap) {
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SkBitmap bg;
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bg.setConfig(SkBitmap::kARGB_8888_Config, N, N);
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bg.allocPixels();
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SkAutoCanvasRestore acr(canvas, true);
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for (int i = 0; i < N-2; i++) {
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bg.eraseColor(0);
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SkCanvas c(bg);
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c.scale(SK_Scalar1 / (1 << i), SK_Scalar1 / (1 << i));
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c.drawBitmap(bitmap, 0, 0, NULL);
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canvas->save();
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canvas->scale(SkIntToScalar(1 << i), SkIntToScalar(1 << i));
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canvas->drawBitmap(bg, 0, 0, NULL);
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canvas->restore();
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canvas->translate(SkIntToScalar(N + 8), 0);
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}
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
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drawN2(canvas, fBitmap);
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canvas->translate(0, SkIntToScalar(N + 8));
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SkBitmap bitmap(fBitmap);
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bitmap.buildMipMap();
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drawN2(canvas, bitmap);
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fWidth += fDW;
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if (fDW > 0 && fWidth > N) {
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fDW = -fDW;
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fWidth = N;
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} else if (fDW < 0 && fWidth < 8) {
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fDW = -fDW;
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fWidth = 8;
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}
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SkRect dst;
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dst.set(0, 0, SkIntToScalar(fWidth), SkIntToScalar(fWidth));
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SkPaint paint;
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paint.setFilterBitmap(true);
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paint.setAntiAlias(true);
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canvas->translate(0, SkIntToScalar(N + 8));
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canvas->drawBitmapRect(fBitmap, NULL, dst, NULL);
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canvas->translate(SkIntToScalar(N + 8), 0);
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canvas->drawBitmapRect(fBitmap, NULL, dst, &paint);
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canvas->translate(SkIntToScalar(N + 8), 0);
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canvas->drawBitmapRect(bitmap, NULL, dst, NULL);
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canvas->translate(SkIntToScalar(N + 8), 0);
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canvas->drawBitmapRect(bitmap, NULL, dst, &paint);
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this->inval(NULL);
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}
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private:
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int fWidth, fDW;
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typedef SkView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new MipMapView; }
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static SkViewRegister reg(MyFactory);
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@ -79,6 +79,7 @@
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2762F66D0FCCCABE002BD8B4 /* SkFlipPixelRef.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2762F66B0FCCCABE002BD8B4 /* SkFlipPixelRef.cpp */; };
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2762F66E0FCCCABE002BD8B4 /* SkPageFlipper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2762F66C0FCCCABE002BD8B4 /* SkPageFlipper.cpp */; };
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2762F67D0FCCCB01002BD8B4 /* SamplePageFlip.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2762F6770FCCCB01002BD8B4 /* SamplePageFlip.cpp */; };
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2794C04F0FE72903009AD112 /* SampleMipMap.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 2794C04E0FE72903009AD112 /* SampleMipMap.cpp */; };
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8D0C4E8D0486CD37000505A6 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 0867D6AAFE840B52C02AAC07 /* InfoPlist.strings */; };
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8D0C4E8E0486CD37000505A6 /* main.nib in Resources */ = {isa = PBXBuildFile; fileRef = 02345980000FD03B11CA0E72 /* main.nib */; };
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8D0C4E920486CD37000505A6 /* Carbon.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 20286C33FDCF999611CA2CEA /* Carbon.framework */; };
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@ -211,6 +212,7 @@
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2762F6770FCCCB01002BD8B4 /* SamplePageFlip.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SamplePageFlip.cpp; path = ../../samplecode/SamplePageFlip.cpp; sourceTree = SOURCE_ROOT; };
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2762F6780FCCCB01002BD8B4 /* SamplePolyToPoly.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SamplePolyToPoly.cpp; path = ../../samplecode/SamplePolyToPoly.cpp; sourceTree = SOURCE_ROOT; };
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2762F6790FCCCB01002BD8B4 /* SampleTests.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleTests.cpp; path = ../../samplecode/SampleTests.cpp; sourceTree = SOURCE_ROOT; };
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2794C04E0FE72903009AD112 /* SampleMipMap.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleMipMap.cpp; path = ../../samplecode/SampleMipMap.cpp; sourceTree = SOURCE_ROOT; };
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32DBCF6D0370B57F00C91783 /* CICarbonSample_Prefix.pch */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CICarbonSample_Prefix.pch; sourceTree = "<group>"; };
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4A9504C8FFE6A3BC11CA0CBA /* ApplicationServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ApplicationServices.framework; path = /System/Library/Frameworks/ApplicationServices.framework; sourceTree = "<absolute>"; };
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4A9504CAFFE6A41611CA0CBA /* CoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreServices.framework; path = /System/Library/Frameworks/CoreServices.framework; sourceTree = "<absolute>"; };
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@ -267,6 +269,7 @@
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008C4D970F77DAEE0056981C /* SampleHairline.cpp */,
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0041CE1F0F00A12400695E8C /* SampleCamera.cpp */,
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0041CE200F00A12400695E8C /* SampleCircle.cpp */,
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2794C04E0FE72903009AD112 /* SampleMipMap.cpp */,
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0041CE210F00A12400695E8C /* SampleCode.h */,
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0041CE220F00A12400695E8C /* SampleCull.cpp */,
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0041CE230F00A12400695E8C /* SampleDither.cpp */,
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@ -571,6 +574,7 @@
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00A7295D0FD8397600D5051F /* SampleAll.cpp in Sources */,
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000A99820FD97526007E45BD /* SampleArc.cpp in Sources */,
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00AF77B00FE2EA2D007F9650 /* SampleTestGL.cpp in Sources */,
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2794C04F0FE72903009AD112 /* SampleMipMap.cpp in Sources */,
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);
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runOnlyForDeploymentPostprocessing = 0;
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};
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