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/*
* 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;
fCurIntf = NULL;
fCurContext = NULL;
fGpuDevice = NULL;
fCanvas = NULL;
}
SkGLWidget::~SkGLWidget() {
SkSafeUnref(fCurIntf);
SkSafeUnref(fCurContext);
SkSafeUnref(fGpuDevice);
SkSafeUnref(fCanvas);
}
void SkGLWidget::setSampleCount(int sampleCount)
{
QGLFormat currentFormat = format();
currentFormat.setSampleBuffers(sampleCount > 0);
currentFormat.setSamples(sampleCount);
setFormat(currentFormat);
}
void SkGLWidget::initializeGL() {
fCurIntf = GrGLCreateNativeInterface();
if (!fCurIntf) {
return;
}
glStencilMask(0xffffffff);
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
fCurContext = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext) fCurIntf);
GrBackendRenderTargetDesc desc = this->getDesc(this->width(), this->height());
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
GrRenderTarget* curRenderTarget = fCurContext->wrapBackendRenderTarget(desc);
fGpuDevice = SkGpuDevice::Create(curRenderTarget,
SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType));
fCanvas = new SkCanvas(fGpuDevice);
curRenderTarget->unref();
}
void SkGLWidget::resizeGL(int w, int h) {
if (fCurContext) {
glDisable(GL_SCISSOR_TEST);
glStencilMask(0xffffffff);
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
fCurContext->resetContext();
GrBackendRenderTargetDesc desc = this->getDesc(w, h);
desc.fOrigin = kBottomLeft_GrSurfaceOrigin;
GrRenderTarget* curRenderTarget = fCurContext->wrapBackendRenderTarget(desc);
SkSafeUnref(fGpuDevice);
SkSafeUnref(fCanvas);
fGpuDevice = SkGpuDevice::Create(curRenderTarget,
SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType));
fCanvas = new SkCanvas(fGpuDevice);
}
fDebugger->setWindowSize(w, h);
draw();
}
void SkGLWidget::paintGL() {
if (!this->isHidden() && fCanvas) {
fDebugger->draw(fCanvas);
// 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
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