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      1 
      2 /*
      3  * Copyright 2014 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 <QtGui>
     10 
     11 #include "SkDebugger.h"
     12 #include "SkDrawCommandGeometryWidget.h"
     13 
     14 SkDrawCommandGeometryWidget::SkDrawCommandGeometryWidget(SkDebugger *debugger)
     15     : QFrame()
     16     , fDebugger(debugger)
     17     , fCommandIndex(-1) {
     18     this->setStyleSheet("QFrame {background-color: black; border: 1px solid #cccccc;}");
     19 }
     20 
     21 void SkDrawCommandGeometryWidget::resizeEvent(QResizeEvent* event) {
     22     this->QFrame::resizeEvent(event);
     23     QRect r = this->contentsRect();
     24     int dim = std::min(r.width(), r.height());
     25     if (dim == 0) {
     26         fSurface.reset(nullptr);
     27     } else {
     28         SkImageInfo info = SkImageInfo::MakeN32Premul(dim, dim);
     29         fSurface.reset(SkSurface::NewRaster(info));
     30         this->updateImage();
     31     }
     32 }
     33 
     34 void SkDrawCommandGeometryWidget::paintEvent(QPaintEvent* event) {
     35     this->QFrame::paintEvent(event);
     36 
     37     if (!fSurface) {
     38         return;
     39     }
     40 
     41     QPainter painter(this);
     42     painter.setRenderHint(QPainter::Antialiasing);
     43 
     44     SkImageInfo info;
     45     size_t rowBytes;
     46     if (const void* pixels = fSurface->peekPixels(&info, &rowBytes)) {
     47         SkASSERT(info.width() > 0);
     48         SkASSERT(info.height() > 0);
     49 
     50         QRectF resultRect;
     51         if (this->width() < this->height()) {
     52             float ratio = this->width() / info.width();
     53             resultRect = QRectF(0, 0, this->width(), ratio * info.height());
     54         } else {
     55             float ratio = this->height() / info.height();
     56             resultRect = QRectF(0, 0, ratio * info.width(), this->height());
     57         }
     58 
     59         resultRect.moveCenter(this->contentsRect().center());
     60 
     61         QImage image(reinterpret_cast<const uchar*>(pixels),
     62                      info.width(),
     63                      info.height(),
     64                      rowBytes,
     65                      QImage::Format_ARGB32_Premultiplied);
     66         painter.drawImage(resultRect, image);
     67     }
     68 }
     69 
     70 void SkDrawCommandGeometryWidget::setDrawCommandIndex(int commandIndex) {
     71     fCommandIndex = commandIndex;
     72     this->updateImage();
     73 }
     74 
     75 void SkDrawCommandGeometryWidget::updateImage() {
     76     if (!fSurface) {
     77         return;
     78     }
     79 
     80     bool didRender = false;
     81     const SkTDArray<SkDrawCommand*>& commands = fDebugger->getDrawCommands();
     82     if (0 != commands.count() && fCommandIndex >= 0) {
     83         SkASSERT(commands.count() > fCommandIndex);
     84         SkDrawCommand* command = commands[fCommandIndex];
     85         didRender = command->render(fSurface->getCanvas());
     86     }
     87 
     88     if (!didRender) {
     89         fSurface->getCanvas()->clear(SK_ColorTRANSPARENT);
     90     }
     91 
     92     fSurface->getCanvas()->flush();
     93     this->update();
     94 }
     95