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Unified Diff: experimental/SkiaExamples/SkExample.cpp

Issue 890873003: update example (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: remove multiple example cruft Created 5 years, 11 months ago
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Index: experimental/SkiaExamples/SkExample.cpp
diff --git a/experimental/SkiaExamples/SkExample.cpp b/experimental/SkiaExamples/SkExample.cpp
index 637ec9df538f2e180eb23dfc56edabb6b498a47f..849c14b3ec2ba962e3b448c4c9c34af1e99af725 100644
--- a/experimental/SkiaExamples/SkExample.cpp
+++ b/experimental/SkiaExamples/SkExample.cpp
@@ -9,22 +9,12 @@
#include "SkExample.h"
-#include "gl/GrGLUtil.h"
-#include "gl/GrGLDefines.h"
#include "gl/GrGLInterface.h"
#include "SkApplication.h"
-#include "SkCommandLineFlags.h"
-#include "SkGpuDevice.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
#include "SkGraphics.h"
-
-DEFINE_string2(match, m, NULL, "[~][^]substring[$] [...] of test name to run.\n" \
- "Multiple matches may be separated by spaces.\n" \
- "~ causes a matching test to always be skipped\n" \
- "^ requires the start of the test to match\n" \
- "$ requires the end of the test to match\n" \
- "^ and $ requires an exact match\n" \
- "If a test does not match any list entry,\n" \
- "it is skipped unless some list entry starts with ~");
+#include "SkGr.h"
void application_init() {
SkGraphics::Init();
@@ -38,36 +28,37 @@ void application_term() {
SkExampleWindow::SkExampleWindow(void* hwnd)
: INHERITED(hwnd) {
- fRegistry = SkExample::Registry::Head();
- fCurrExample = fRegistry->factory()(this);
-
- if (FLAGS_match.count()) {
- // Start with the a matching sample if possible.
- bool found = this->findNextMatch();
- if (!found) {
- SkDebugf("No matching SkExample found.\n");
- }
- }
+ fType = SkExampleWindow::kGPU_DeviceType;
+ fRenderTarget = NULL;
+ fRotationAngle = 0;
+ this->setTitle();
+ this->setUpBackend();
+}
+
+SkExampleWindow::~SkExampleWindow() {
+ tearDownBackend();
}
void SkExampleWindow::tearDownBackend() {
- if (kGPU_DeviceType == fType) {
- SkSafeUnref(fContext);
- fContext = NULL;
+ SkSafeUnref(fContext);
+ fContext = NULL;
- SkSafeUnref(fInterface);
- fInterface = NULL;
+ SkSafeUnref(fInterface);
+ fInterface = NULL;
- SkSafeUnref(fRenderTarget);
- fRenderTarget = NULL;
+ SkSafeUnref(fRenderTarget);
+ fRenderTarget = NULL;
- detach();
- }
+ INHERITED::detach();
}
-bool SkExampleWindow::setupBackend(DeviceType type) {
- fType = type;
+void SkExampleWindow::setTitle() {
+ SkString title("SkiaExample ");
+ title.appendf(fType == kRaster_DeviceType ? "raster" : "opengl");
+ INHERITED::setTitle(title.c_str());
+}
+bool SkExampleWindow::setUpBackend() {
this->setColorType(kRGBA_8888_SkColorType);
this->setVisibleP(true);
this->setClipToBounds(false);
@@ -86,109 +77,117 @@ bool SkExampleWindow::setupBackend(DeviceType type) {
fContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)fInterface);
SkASSERT(NULL != fContext);
- setupRenderTarget();
-
+ this->setUpRenderTarget();
return true;
}
-void SkExampleWindow::setupRenderTarget() {
- GrBackendRenderTargetDesc desc;
- desc.fWidth = SkScalarRoundToInt(width());
- desc.fHeight = SkScalarRoundToInt(height());
- desc.fConfig = kSkia8888_GrPixelConfig;
- desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
- desc.fSampleCnt = fAttachmentInfo.fSampleCount;
- desc.fStencilBits = fAttachmentInfo.fStencilBits;
+void SkExampleWindow::setUpRenderTarget() {
+ SkSafeUnref(fRenderTarget);
+ fRenderTarget = this->renderTarget(fAttachmentInfo, fInterface, fContext);
+}
- GrGLint buffer;
- GR_GL_GetIntegerv(fInterface, GR_GL_FRAMEBUFFER_BINDING, &buffer);
- desc.fRenderTargetHandle = buffer;
+void SkExampleWindow::drawContents(SkCanvas* canvas) {
+ // Clear background
+ canvas->drawColor(SK_ColorWHITE);
- fRenderTarget = fContext->wrapBackendRenderTarget(desc);
+ SkPaint paint;
+ paint.setColor(SK_ColorRED);
- fContext->setRenderTarget(fRenderTarget);
-}
+ // Draw a rectangle with red paint
+ SkRect rect = {
+ 10, 10,
+ 128, 128
+ };
+ canvas->drawRect(rect, paint);
-SkCanvas* SkExampleWindow::createCanvas() {
- if (fType == kGPU_DeviceType) {
- if (NULL != fContext && NULL != fRenderTarget) {
- SkAutoTUnref<SkBaseDevice> device(new SkGpuDevice(fContext, fRenderTarget));
- return new SkCanvas(device);
- }
- tearDownBackend();
- setupBackend(kRaster_DeviceType);
+ // Set up a linear gradient and draw a circle
+ {
+ SkPoint linearPoints[] = {
+ {0, 0},
+ {300, 300}
+ };
+ SkColor linearColors[] = {SK_ColorGREEN, SK_ColorBLACK};
+
+ SkShader* shader = SkGradientShader::CreateLinear(
+ linearPoints, linearColors, NULL, 2,
+ SkShader::kMirror_TileMode);
+ SkAutoUnref shader_deleter(shader);
+
+ paint.setShader(shader);
+ paint.setFlags(SkPaint::kAntiAlias_Flag);
+
+ canvas->drawCircle(200, 200, 64, paint);
+
+ // Detach shader
+ paint.setShader(NULL);
}
- return INHERITED::createCanvas();
+
+ // Draw a message with a nice black paint.
+ paint.setFlags(
+ SkPaint::kAntiAlias_Flag |
+ SkPaint::kSubpixelText_Flag | // ... avoid waggly text when rotating.
+ SkPaint::kUnderlineText_Flag);
+ paint.setColor(SK_ColorBLACK);
+ paint.setTextSize(20);
+
+ canvas->save();
+
+ static const char message[] = "Hello Skia!!!";
+
+ // Translate and rotate
+ canvas->translate(300, 300);
+ fRotationAngle += 0.2f;
+ if (fRotationAngle > 360) {
+ fRotationAngle -= 360;
+ }
+ canvas->rotate(fRotationAngle);
+
+ // Draw the text:
+ canvas->drawText(message, strlen(message), 0, 0, paint);
+
+ canvas->restore();
}
void SkExampleWindow::draw(SkCanvas* canvas) {
- if (NULL != fCurrExample) {
- fCurrExample->draw(canvas);
- }
- if (fType == kGPU_DeviceType) {
+ drawContents(canvas);
+ // in case we have queued drawing calls
+ fContext->flush();
+ // Invalidate the window to force a redraw. Poor man's animation mechanism.
+ this->inval(NULL);
- SkASSERT(NULL != fContext);
- fContext->flush();
- }
- if (fType == kRaster_DeviceType) {
+ if (kRaster_DeviceType == fType) {
// need to send the raster bits to the (gpu) window
- fContext->setRenderTarget(fRenderTarget);
- const SkBitmap& bm = getBitmap();
- fRenderTarget->writePixels(0, 0, bm.width(), bm.height(),
- kSkia8888_GrPixelConfig,
- bm.getPixels(),
- bm.rowBytes());
+ SkImage* snap = fSurface->newImageSnapshot();
+ size_t rowBytes;
+ SkImageInfo info;
+ const void* pixels = snap->peekPixels(&info, &rowBytes);
+ fRenderTarget->writePixels(0, 0, snap->width(), snap->height(),
+ SkImageInfo2GrPixelConfig(info.colorType(),
+ info.alphaType(),
+ info.profileType()),
+ pixels,
+ rowBytes,
+ GrContext::kFlushWrites_PixelOp);
+ SkSafeUnref(snap);
}
INHERITED::present();
}
void SkExampleWindow::onSizeChange() {
- setupRenderTarget();
-}
-
-#ifdef SK_BUILD_FOR_WIN
-void SkExampleWindow::onHandleInval(const SkIRect& rect) {
- RECT winRect;
- winRect.top = rect.top();
- winRect.bottom = rect.bottom();
- winRect.right = rect.right();
- winRect.left = rect.left();
- InvalidateRect((HWND)this->getHWND(), &winRect, false);
-}
-#endif
-
-bool SkExampleWindow::findNextMatch() {
- bool found = false;
- // Avoid infinite loop by knowing where we started.
- const SkExample::Registry* begin = fRegistry;
- while (!found) {
- fRegistry = fRegistry->next();
- if (NULL == fRegistry) { // Reached the end of the registered samples. GOTO head.
- fRegistry = SkExample::Registry::Head();
- }
- SkExample* next = fRegistry->factory()(this);
- if (!SkCommandLineFlags::ShouldSkip(FLAGS_match, next->getName().c_str())) {
- fCurrExample = next;
- found = true;
- }
- if (begin == fRegistry) { // We looped through every sample without finding anything.
- break;
- }
- }
- return found;
+ setUpRenderTarget();
}
bool SkExampleWindow::onHandleChar(SkUnichar unichar) {
- if ('n' == unichar) {
- bool found = findNextMatch();
- if (!found) {
- SkDebugf("No SkExample that matches your query\n");
- }
+ if (' ' == unichar) {
+ fType = fType == kRaster_DeviceType ? kGPU_DeviceType: kRaster_DeviceType;
+ tearDownBackend();
+ setUpBackend();
+ this->setTitle();
+ this->inval(NULL);
}
return true;
}
-SkOSWindow* create_sk_window(void* hwnd, int argc, char** argv) {
- SkCommandLineFlags::Parse(argc, argv);
+SkOSWindow* create_sk_window(void* hwnd, int , char** ) {
return new SkExampleWindow(hwnd);
}
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