100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
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/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkGLWidget.h"
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#if SK_SUPPORT_GPU
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SkGLWidget::SkGLWidget(SkDebugger* debugger) : QGLWidget() {
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fDebugger = debugger;
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}
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SkGLWidget::~SkGLWidget() {
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}
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void SkGLWidget::setSampleCount(int sampleCount) {
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QGLFormat currentFormat = format();
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currentFormat.setSampleBuffers(sampleCount > 0);
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currentFormat.setSamples(sampleCount);
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setFormat(currentFormat);
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}
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void SkGLWidget::initializeGL() {
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if (!fCurIntf) {
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fCurIntf.reset(GrGLCreateNativeInterface());
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}
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if (!fCurIntf) {
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return;
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}
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// The call may come multiple times, for example after setSampleCount(). The QGLContext will be
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// different, but we do not have a mechanism to catch the destroying of QGLContext, so that
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// proper resource cleanup could be made.
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if (fCurContext) {
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fCurContext->abandonContext();
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}
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fGpuDevice.reset(NULL);
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fCanvas.reset(NULL);
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fCurContext.reset(GrContext::Create(kOpenGL_GrBackend, (GrBackendContext) fCurIntf.get()));
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}
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void SkGLWidget::createRenderTarget() {
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if (!fCurContext) {
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return;
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}
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glDisable(GL_SCISSOR_TEST);
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glStencilMask(0xffffffff);
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glClearStencil(0);
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glClear(GL_STENCIL_BUFFER_BIT);
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fCurContext->resetContext();
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fGpuDevice.reset(NULL);
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fCanvas.reset(NULL);
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GrBackendRenderTargetDesc desc = this->getDesc(this->width(), this->height());
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desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
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SkAutoTUnref<GrRenderTarget> curRenderTarget(
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fCurContext->textureProvider()->wrapBackendRenderTarget(desc));
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SkSurfaceProps props(SkSurfaceProps::kLegacyFontHost_InitType);
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fGpuDevice.reset(SkGpuDevice::Create(curRenderTarget, &props));
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fCanvas.reset(new SkCanvas(fGpuDevice));
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}
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void SkGLWidget::resizeGL(int w, int h) {
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SkASSERT(w == this->width() && h == this->height());
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this->createRenderTarget();
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}
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void SkGLWidget::paintGL() {
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if (!this->isHidden() && fCanvas) {
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fCurContext->resetContext();
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fDebugger->draw(fCanvas.get());
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// TODO(chudy): Implement an optional flush button in Gui.
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fCanvas->flush();
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emit drawComplete();
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}
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}
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GrBackendRenderTargetDesc SkGLWidget::getDesc(int w, int h) {
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GrBackendRenderTargetDesc desc;
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desc.fWidth = SkScalarRoundToInt(this->width());
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desc.fHeight = SkScalarRoundToInt(this->height());
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desc.fConfig = kSkia8888_GrPixelConfig;
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GR_GL_GetIntegerv(fCurIntf, GR_GL_SAMPLES, &desc.fSampleCnt);
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GR_GL_GetIntegerv(fCurIntf, GR_GL_STENCIL_BITS, &desc.fStencilBits);
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GrGLint buffer;
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GR_GL_GetIntegerv(fCurIntf, GR_GL_FRAMEBUFFER_BINDING, &buffer);
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desc.fRenderTargetHandle = buffer;
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return desc;
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}
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#endif
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