378 lines
9.9 KiB
C++
378 lines
9.9 KiB
C++
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#include "qtofflinegl.h"
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#include <traster.h>
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#include <tconvert.h>
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//-----------------------------------------------------------------------------
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#ifdef WIN32
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void swapRedBlueChannels(void *buffer, int bufferSize) // Flips The Red And Blue Bytes (WidthxHeight)
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{
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void *b = buffer; // Pointer To The Buffer
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#ifdef x64
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int size = bufferSize;
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UCHAR *pix = (UCHAR *)b;
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while (size > 0) {
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UCHAR r = *pix;
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UCHAR b = *(pix + 2);
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*pix = b;
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*(pix + 2) = r;
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pix += 4;
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size--;
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}
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#else
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__asm // Assembler Code To Follow
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{
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mov ecx, bufferSize // Counter Set To Dimensions Of Our Memory Block
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mov ebx, b // Points ebx To Our Data (b)
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label: // Label Used For Looping
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mov al,[ebx+0] // Loads Value At ebx Into al
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mov ah,[ebx+2] // Loads Value At ebx+2 Into ah
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mov [ebx+2],al // Stores Value In al At ebx+2
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mov [ebx+0],ah // Stores Value In ah At ebx
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add ebx,4 // Moves Through The Data By 4 Bytes
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dec ecx // Decreases Our Loop Counter
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jnz label // If Not Zero Jump Back To Label
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}
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#endif
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}
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#endif
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//-----------------------------------------------------------------------------
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#if defined(MACOSX)
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#if defined(powerpc)
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void rightRotateBits(UCHAR *buf, int bufferSize)
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{
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UINT *buffer = (UINT *)buf;
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register UINT app;
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for (int i = 0; i < bufferSize; i++, buffer++) {
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app = *buffer;
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*buffer = app >> 8 | app << 24;
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}
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}
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#else
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void rightRotateBits(UCHAR *buf, int bufferSize)
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{
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UINT *buffer = (UINT *)buf;
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register UINT app;
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for (int i = 0; i < bufferSize; i++, buffer++) {
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app = *buffer;
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*buffer = (app >> 16 & 0x000000ff) | (app << 16 & 0x00ff0000) | (app & 0xff00ff00);
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}
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}
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#endif
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#endif
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//-----------------------------------------------------------------------------
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//=============================================================================
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// QtOfflineGL : implem. offlineGL usando QT
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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QtOfflineGL::QtOfflineGL(TDimension rasterSize, const TOfflineGL::Imp *shared)
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: TOfflineGL::Imp(rasterSize.lx, rasterSize.ly), m_context(0), m_oldContext(0)
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{
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createContext(rasterSize, shared);
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/*
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makeCurrent();
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glClearColor(0.0f,0.0f,0.0f,0.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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doneCurrent();
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*/
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}
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//-----------------------------------------------------------------------------
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QtOfflineGL::~QtOfflineGL()
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{
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delete m_context;
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::createContext(TDimension rasterSize, const TOfflineGL::Imp *shared)
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{
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// Imposto il formato dei Pixel (pixelFormat)
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/*
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32, // 32-bit color depth
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0, 0, 0, 0, 0, 0, // color bits ignored
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8, // no alpha buffer
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0, // shift bit ignored
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0, // no accumulation buffer
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0, 0, 0, 0, // accum bits ignored
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32, // 32-bit z-buffer
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32, // max stencil buffer
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0, // no auxiliary buffer
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PFD_MAIN_PLANE, // main layer
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0, // reserved
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0, 0, 0 // layer masks ignored
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ATTENZIONE !! SU MAC IL FORMATO E' DIVERSO (casomai possiamo mettere un ifdef)
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SPECIFICHE MAC = depth_size 24, stencil_size 8, alpha_size 1
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*/
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QGLFormat fmt;
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#ifdef WIN32
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fmt.setAlphaBufferSize(8);
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fmt.setAlpha(true);
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fmt.setRgba(true);
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fmt.setDepthBufferSize(32);
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fmt.setDepth(true);
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fmt.setStencilBufferSize(32);
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fmt.setStencil(true);
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fmt.setAccum(false);
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fmt.setPlane(0);
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#elif MACOSX
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fmt = QGLFormat::defaultFormat();
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//printf("GL Version: %s\n",glGetString(GL_VERSION));
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fmt.setVersion(2, 1); /* OSX10.8 では 3.2 だめかも */
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#if 0
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fmt.setAlphaBufferSize(8);
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fmt.setAlpha(true);
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fmt.setRgba(true);
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fmt.setDepthBufferSize(32);
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fmt.setDepth(true);
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fmt.setStencilBufferSize(8);
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fmt.setStencil(true);
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fmt.setAccum(false);
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fmt.setPlane(0);
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fmt.setDirectRendering(false);
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#endif
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#endif
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/* FIXME: ここでいう QPixmap は Level Strip のセルに相当する.
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QPixmap に GLContext を生成して bind できれば描画したベクタのラスタ画像がそこに反映されるはずだが
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QLContext の生成ができないためにうまくいかない.
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*/
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printf("QPixmap(%d, %d)\n", rasterSize.lx, rasterSize.ly);
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//QPixmap *m_pixmap = new QPixmap(rasterSize.lx, rasterSize.ly);
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// Inizializzo un contesto openGL utilizzando una QPixmap
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m_context = new QOpenGLContext();
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//m_context = new QGLContext(fmt);
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m_surface = new QOffscreenSurface();
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m_surface->setFormat(m_context->format());
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//QSurfaceFormat sfmt = QGuiApplication::focusWindow()->format();
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m_surface->create();
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printf("create context:%p [thread:0x%x]\n", m_context, QThread::currentThreadId());
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//m_context->setFormat(sfmt);
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// Creo il contesto OpenGL - assicurandomi che sia effettivamente creato
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// NOTA: Se il contesto non viene creato, di solito basta ritentare qualche volta.
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bool ret = m_context->create();
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::makeCurrent()
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{
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if (m_context) {
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m_context->makeCurrent(m_surface);
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}
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// else
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// m_oldContext = 0;
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::doneCurrent()
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{
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if (m_context) {
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m_context->doneCurrent();
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}
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::saveCurrentContext()
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{
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// m_oldContext = const_cast<QGLContext*>(QGLContext::currentContext());
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::restoreCurrentContext()
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{
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// if(m_oldContext) m_oldContext->makeCurrent();
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// m_oldContext = 0;
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGL::getRaster(TRaster32P raster)
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{
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makeCurrent();
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glFlush();
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int lx = raster->getLx();
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int ly = raster->getLy();
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raster->lock();
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glReadPixels(0, 0, lx, ly,
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GL_RGBA /*GL_BGRA_EXT*/, GL_UNSIGNED_BYTE,
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raster->getRawData());
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#ifdef WIN32
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swapRedBlueChannels(raster->getRawData(), lx * ly);
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#elif MACOSX
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rightRotateBits(raster->getRawData(), lx * ly);
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#endif
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raster->unlock();
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}
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//QGLPixelBuffer::hasOpenGLPbuffers() (statica) -> true se la scheda supporta i PBuffer
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//=============================================================================
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// QtOfflineGLPBuffer : implem. offlineGL usando QT e PBuffer
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//-----------------------------------------------------------------------------
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QtOfflineGLPBuffer::QtOfflineGLPBuffer(TDimension rasterSize)
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: TOfflineGL::Imp(rasterSize.lx, rasterSize.ly), m_context(0)
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{
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createContext(rasterSize);
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makeCurrent();
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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doneCurrent();
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}
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//-----------------------------------------------------------------------------
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QtOfflineGLPBuffer::~QtOfflineGLPBuffer()
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{
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delete m_context;
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGLPBuffer::createContext(TDimension rasterSize)
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{
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// Imposto il formato dei Pixel (pixelFormat)
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/*
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32, // 32-bit color depth
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0, 0, 0, 0, 0, 0, // color bits ignored
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8, // no alpha buffer
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0, // shift bit ignored
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0, // no accumulation buffer
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0, 0, 0, 0, // accum bits ignored
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32, // 32-bit z-buffer
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32, // max stencil buffer
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0, // no auxiliary buffer
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PFD_MAIN_PLANE, // main layer
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0, // reserved
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0, 0, 0 // layer masks ignored
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ATTENZIONE !! SU MAC IL FORMATO E' DIVERSO (casomai possiamo mettere un ifdef)
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SPECIFICHE MAC = depth_size 24, stencil_size 8, alpha_size 1
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*/
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QGLFormat fmt;
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#ifdef WIN32
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fmt.setAlphaBufferSize(8);
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fmt.setAlpha(false);
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fmt.setRgba(true);
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fmt.setDepthBufferSize(32);
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fmt.setDepth(true);
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fmt.setStencilBufferSize(32);
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fmt.setStencil(true);
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fmt.setAccum(false);
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fmt.setPlane(0);
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#elif MACOSX
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fmt.setAlphaBufferSize(1);
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fmt.setAlpha(false);
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fmt.setRgba(true);
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fmt.setDepthBufferSize(24);
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fmt.setDepth(true);
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fmt.setStencilBufferSize(8);
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fmt.setStencil(true);
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fmt.setAccum(false);
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fmt.setPlane(0);
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#endif
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// Il PixelBuffer deve essere con width ed height potenze di 2
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int sizeMax = tmax(rasterSize.lx, rasterSize.ly);
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// trovo la potenza di 2 che "contiene" sizeMax e la utilizzo per il PBuffer
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int pBufferSize = 2;
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while (pBufferSize < sizeMax)
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pBufferSize *= 2;
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m_context = new QGLPixelBuffer(QSize(pBufferSize, pBufferSize), fmt);
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGLPBuffer::makeCurrent()
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{
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if (m_context)
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m_context->makeCurrent();
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGLPBuffer::doneCurrent()
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{
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if (m_context)
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m_context->doneCurrent();
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}
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//-----------------------------------------------------------------------------
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void QtOfflineGLPBuffer::getRaster(TRaster32P raster)
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{
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makeCurrent();
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glFlush();
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//The image is stored using a 32-bit ARGB format (0xAARRGGBB).
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QImage image = m_context->toImage();
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int lx = raster->getLx(), ly = raster->getLy();
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static const TRaster32P emptyRaster;
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if (image.height() == 0 || image.width() == 0)
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return;
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// devo iniziare a leggere la Y da un certo offset
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// dato dalla differenza tra la y della image e la y del raster
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int yOffset = image.height() - ly;
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raster->lock();
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for (int y = 0; y < ly; y++) {
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QRgb *inpPix = (QRgb *)image.scanLine(yOffset + y);
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TPixel32 *pix = raster->pixels(ly - 1 - y);
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TPixel32 *endPix = pix + lx;
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for (; pix < endPix; ++pix) {
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pix->m = 255;
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pix->r = qRed(*inpPix);
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pix->g = qGreen(*inpPix);
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pix->b = qBlue(*inpPix);
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*inpPix++;
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}
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}
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raster->unlock();
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}
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