| |
| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkGLWidget.h" |
| |
| #if SK_SUPPORT_GPU |
| |
| SkGLWidget::SkGLWidget(SkDebugger* debugger) : QGLWidget() { |
| fDebugger = debugger; |
| } |
| |
| SkGLWidget::~SkGLWidget() { |
| } |
| |
| void SkGLWidget::setSampleCount(int sampleCount) { |
| QGLFormat currentFormat = format(); |
| currentFormat.setSampleBuffers(sampleCount > 0); |
| currentFormat.setSamples(sampleCount); |
| setFormat(currentFormat); |
| } |
| |
| void SkGLWidget::initializeGL() { |
| if (!fCurIntf) { |
| fCurIntf.reset(GrGLCreateNativeInterface()); |
| } |
| if (!fCurIntf) { |
| return; |
| } |
| // The call may come multiple times, for example after setSampleCount(). The QGLContext will be |
| // different, but we do not have a mechanism to catch the destroying of QGLContext, so that |
| // proper resource cleanup could be made. |
| if (fCurContext) { |
| fCurContext->abandonContext(); |
| } |
| |
| fGpuSurface = nullptr; |
| fCanvas = nullptr; |
| |
| fCurContext = GrContext::MakeGL(fCurIntf.get()); |
| } |
| |
| void SkGLWidget::createRenderTarget() { |
| if (!fCurContext) { |
| return; |
| } |
| |
| glDisable(GL_SCISSOR_TEST); |
| glStencilMask(0xffffffff); |
| glClearStencil(0); |
| glClear(GL_STENCIL_BUFFER_BIT); |
| fCurContext->resetContext(); |
| GrBackendRenderTarget backendRenderTarget = this->getBackendRenderTarget(); |
| fGpuSurface = SkSurface::MakeFromBackendRenderTarget(fCurContext.get(), backendRenderTarget, |
| kBottomLeft_GrSurfaceOrigin, |
| nullptr, nullptr); |
| fCanvas = fGpuSurface->getCanvas(); |
| } |
| |
| void SkGLWidget::resizeGL(int w, int h) { |
| SkASSERT(w == this->width() && h == this->height()); |
| this->createRenderTarget(); |
| } |
| |
| void SkGLWidget::paintGL() { |
| if (!this->isHidden() && fCanvas) { |
| fCurContext->resetContext(); |
| fDebugger->draw(fCanvas); |
| // TODO(chudy): Implement an optional flush button in Gui. |
| fCanvas->flush(); |
| Q_EMIT drawComplete(); |
| } |
| } |
| |
| GrBackendRenderTarget SkGLWidget::getBackendRenderTarget() { |
| GrGLFramebufferInfo info; |
| int stencilBits; |
| int sampleCnt; |
| GR_GL_GetIntegerv(fCurIntf.get(), GR_GL_FRAMEBUFFER_BINDING, &info.fFBOID); |
| GR_GL_GetIntegerv(fCurIntf.get(), GR_GL_SAMPLES, &sampleCnt); |
| GR_GL_GetIntegerv(fCurIntf.get(), GR_GL_STENCIL_BITS, &stencilBits); |
| return GrBackendRenderTarget(SkScalarRoundToInt(this->width()), |
| SkScalarRoundToInt(this->height()), |
| sampleCnt, |
| stencilBits, |
| kSkia8888_GrPixelConfig, |
| info); |
| } |
| |
| #endif |