1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #include "SkRasterWidget.h" 10 #include "SkDebugger.h" 11 #include <QtGui> 12 13 SkRasterWidget::SkRasterWidget(SkDebugger *debugger) 14 : QWidget() 15 , fDebugger(debugger) 16 , fNeedImageUpdate(false) { 17 this->setStyleSheet("QWidget {background-color: black; border: 1px solid #cccccc;}"); 18 } 19 20 void SkRasterWidget::resizeEvent(QResizeEvent* event) { 21 this->QWidget::resizeEvent(event); 22 23 QRect r = this->contentsRect(); 24 if (r.width() == 0 || r.height() == 0) { 25 fSurface.reset(nullptr); 26 } else { 27 SkImageInfo info = SkImageInfo::MakeN32Premul(r.width(), r.height()); 28 fSurface.reset(SkSurface::NewRaster(info)); 29 } 30 this->updateImage(); 31 } 32 33 void SkRasterWidget::paintEvent(QPaintEvent* event) { 34 QPainter painter(this); 35 painter.setRenderHint(QPainter::Antialiasing); 36 QStyleOption opt; 37 opt.init(this); 38 style()->drawPrimitive(QStyle::PE_Widget, &opt, &painter, this); 39 40 if (!fSurface) { 41 return; 42 } 43 44 if (fNeedImageUpdate) { 45 fDebugger->draw(fSurface->getCanvas()); 46 fSurface->getCanvas()->flush(); 47 fNeedImageUpdate = false; 48 emit drawComplete(); 49 } 50 51 SkImageInfo info; 52 size_t rowBytes; 53 if (const void* pixels = fSurface->peekPixels(&info, &rowBytes)) { 54 QImage image(reinterpret_cast<const uchar*>(pixels), 55 info.width(), 56 info.height(), 57 rowBytes, 58 QImage::Format_ARGB32_Premultiplied); 59 #if SK_R32_SHIFT == 0 60 painter.drawImage(this->contentsRect(), image.rgbSwapped()); 61 #else 62 painter.drawImage(this->contentsRect(), image); 63 #endif 64 } 65 } 66 67 void SkRasterWidget::updateImage() { 68 if (!fSurface) { 69 return; 70 } 71 fNeedImageUpdate = true; 72 this->update(); 73 } 74
