| |
| /* |
| * 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; |
| } |
| if (!fCurContext) { |
| fCurContext.reset(GrContext::Create(kOpenGL_GrBackend, (GrBackendContext) fCurIntf.get())); |
| } |
| if (!fCurContext) { |
| 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. Instead, we assume that the underlying GL context |
| // never actually changes. If it would, we could not destroy the resources. |
| fGpuDevice.reset(NULL); |
| fCanvas.reset(NULL); |
| } |
| |
| void SkGLWidget::createRenderTarget() { |
| if (!fCurContext) { |
| return; |
| } |
| |
| glDisable(GL_SCISSOR_TEST); |
| glStencilMask(0xffffffff); |
| glClearStencil(0); |
| glClear(GL_STENCIL_BUFFER_BIT); |
| fCurContext->resetContext(); |
| |
| fGpuDevice.reset(NULL); |
| fCanvas.reset(NULL); |
| |
| GrBackendRenderTargetDesc desc = this->getDesc(this->width(), this->height()); |
| desc.fOrigin = kBottomLeft_GrSurfaceOrigin; |
| SkAutoTUnref<GrRenderTarget> curRenderTarget(fCurContext->wrapBackendRenderTarget(desc)); |
| fGpuDevice.reset(SkGpuDevice::Create(curRenderTarget.get(), |
| SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType))); |
| fCanvas.reset(new SkCanvas(fGpuDevice)); |
| } |
| |
| void SkGLWidget::resizeGL(int w, int h) { |
| SkASSERT(w == this->width() && h == this->height()); |
| this->createRenderTarget(); |
| } |
| |
| void SkGLWidget::paintGL() { |
| if (!this->isHidden() && fCanvas) { |
| fDebugger->draw(fCanvas.get()); |
| // TODO(chudy): Implement an optional flush button in Gui. |
| fCanvas->flush(); |
| emit drawComplete(); |
| } |
| } |
| |
| GrBackendRenderTargetDesc SkGLWidget::getDesc(int w, int h) { |
| GrBackendRenderTargetDesc desc; |
| desc.fWidth = SkScalarRoundToInt(this->width()); |
| desc.fHeight = SkScalarRoundToInt(this->height()); |
| desc.fConfig = kSkia8888_GrPixelConfig; |
| GR_GL_GetIntegerv(fCurIntf, GR_GL_SAMPLES, &desc.fSampleCnt); |
| GR_GL_GetIntegerv(fCurIntf, GR_GL_STENCIL_BITS, &desc.fStencilBits); |
| GrGLint buffer; |
| GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer); |
| desc.fRenderTargetHandle = buffer; |
| |
| return desc; |
| } |
| |
| #endif |