945 lines
24 KiB
C++
945 lines
24 KiB
C++
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// TnzCore includes
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#include "texception.h"
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#include "tvectorgl.h"
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#include "tvectorimage.h"
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#include "trasterimage.h"
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#include "tgl.h"
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#include "tthreadmessage.h"
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#include "tsystem.h"
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#include "trop.h"
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// Platform-specific includes
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#if defined(LINUX)
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#include <X11/Xlib.h>
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#include <GL/glx.h>
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#include "xscopedlock.h"
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#include "tthread.h"
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#elif MACOSX
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#include "qtofflinegl.h"
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#endif
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#include "tofflinegl.h"
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#ifndef checkErrorsByGL
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#define checkErrorsByGL \
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{ \
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GLenum err = glGetError(); \
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assert(err != GL_INVALID_ENUM); \
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assert(err != GL_INVALID_VALUE); \
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assert(err != GL_INVALID_OPERATION); \
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assert(err != GL_STACK_OVERFLOW); \
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assert(err != GL_STACK_UNDERFLOW); \
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assert(err != GL_OUT_OF_MEMORY); \
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assert(err == GL_NO_ERROR); \
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}
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#endif
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#undef checkErrorsByGL
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#define checkErrorsByGL /**/
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using namespace std;
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TGLContextManager *currentContextManager = 0;
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void TOfflineGL::setContextManager(TGLContextManager *contextManager)
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{
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currentContextManager = contextManager;
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if (contextManager)
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contextManager->store();
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}
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//=============================================================================
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// WIN32Implementation : implementazione offlineGL WIN32
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//-----------------------------------------------------------------------------
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#ifdef WIN32
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namespace
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{
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//We found out that our implementation of win32 opengl contexts can be someway
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//not thread-safe. Deadlocks and errors could happen for wgl* and GDI functions
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//on particular configurations (notably, Windows 7). So we mutex them as
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//a temporary workaround.
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static QMutex win32ImpMutex;
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}
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//-------------------------------
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class WIN32Implementation : public TOfflineGL::Imp
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{
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public:
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HDC m_offDC;
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HGDIOBJ m_oldobj;
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HGLRC m_hglRC;
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HBITMAP m_offDIB;
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void *m_offData;
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//-----------------------------------------------------------------------------
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WIN32Implementation(TDimension rasterSize, std::shared_ptr<TOfflineGL::Imp> shared)
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: TOfflineGL::Imp(rasterSize.lx, rasterSize.ly)
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{
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m_offData = 0;
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createContext(rasterSize, shared); //makeCurrent is called at the end of this
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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(); //doneCurrent must therefore be called here
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}
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//-----------------------------------------------------------------------------
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~WIN32Implementation()
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{
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QMutexLocker locker(&win32ImpMutex);
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BOOL ret = wglMakeCurrent(m_offDC, NULL);
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assert(ret == TRUE);
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wglDeleteContext(m_hglRC);
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SelectObject(m_offDC, m_oldobj);
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DeleteObject(m_offDC);
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// si potrebbe passare un parametro che evita di distruggere la bitmap.
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// In tal caso il raster dovrebbe diventare owner del buffer, ma attualmente
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// questo non e' settabile in TRaster: quando gli si passa da fuori un buffer,
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// automaticamente bufferOwner viene settato a false e non e' modificabile!
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DeleteObject(m_offDIB);
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}
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//-----------------------------------------------------------------------------
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void makeCurrent()
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{
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QMutexLocker locker(&win32ImpMutex);
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int ret = wglMakeCurrent(m_offDC, m_hglRC);
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assert(ret == TRUE);
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}
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//-----------------------------------------------------------------------------
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void doneCurrent()
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{
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QMutexLocker locker(&win32ImpMutex);
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glFlush();
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glFinish();
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assert(glGetError() == 0);
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wglMakeCurrent(NULL, NULL);
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}
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//-----------------------------------------------------------------------------
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void initBITMAPINFO(BITMAPINFO &info, const TDimension rasterSize)
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{
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memset(&info, 0, sizeof(BITMAPINFOHEADER));
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info.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
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info.bmiHeader.biWidth = rasterSize.lx;
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info.bmiHeader.biHeight = rasterSize.ly;
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info.bmiHeader.biPlanes = 1;
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info.bmiHeader.biBitCount = 32;
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info.bmiHeader.biCompression = BI_RGB;
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info.bmiHeader.biSizeImage = 0;
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info.bmiHeader.biXPelsPerMeter = 1000;
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info.bmiHeader.biYPelsPerMeter = 1000;
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info.bmiHeader.biClrUsed = 0;
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info.bmiHeader.biClrImportant = 0;
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}
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//-----------------------------------------------------------------------------
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void createContext(TDimension rasterSize, std::shared_ptr<TOfflineGL::Imp> shared)
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{
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QMutexLocker locker(&win32ImpMutex);
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BITMAPINFO info;
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initBITMAPINFO(info, rasterSize);
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// open an offscreen device
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m_offDC = CreateCompatibleDC(NULL);
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// and a bitmap image
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m_offDIB = CreateDIBSection(m_offDC, &info, DIB_RGB_COLORS, &m_offData, NULL, 0);
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assert(m_offDIB);
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assert(m_offData);
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if (!m_offDIB || !m_offData)
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throw TException("cannot create OpenGL context. Check system resources!");
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int dataSize = rasterSize.lx * rasterSize.ly * 4; // number of byte of raster
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memset(m_offData, 0, dataSize);
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m_oldobj = SelectObject(m_offDC, m_offDIB); // select BIB to write
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static PIXELFORMATDESCRIPTOR pfd =
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{
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sizeof(PIXELFORMATDESCRIPTOR), // size of this pfd
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1, // version number
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0 | (false ? (PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER) : (PFD_DRAW_TO_BITMAP | PFD_SUPPORT_GDI)) | PFD_SUPPORT_OPENGL, // support OpenGL
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PFD_TYPE_RGBA, // RGBA type
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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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};
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// get the best available match of pixel format for the device context
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int iPixelFormat = ChoosePixelFormat(m_offDC, &pfd);
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assert(iPixelFormat != 0);
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// make that the pixel format of the device context
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int ret = SetPixelFormat(m_offDC, iPixelFormat, &pfd);
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assert(ret == TRUE);
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// make a valid context for OpenGL rendering
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m_hglRC = wglCreateContext(m_offDC);
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assert(m_hglRC);
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if (!m_hglRC)
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throw TException("cannot create OpenGL context. Check system resources!");
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if (shared) {
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// Share shared's display lists
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const WIN32Implementation *sharedImp = dynamic_cast<const WIN32Implementation *>(shared.get());
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assert(sharedImp);
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bool ok = wglShareLists(sharedImp->m_hglRC, m_hglRC);
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assert(ok);
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}
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ret = wglMakeCurrent(m_offDC, m_hglRC);
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assert(ret == TRUE);
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}
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//-----------------------------------------------------------------------------
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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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/*unsigned long ebx = (unsigned long)b;
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while(size>0)
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{
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unsigned char al =__readgsbyte(ebx);
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unsigned char ah =__readgsbyte(ebx+2);
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__writegsbyte(ebx+2,al);
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__writegsbyte(ebx,ah);
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ebx+=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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//-----------------------------------------------------------------------------
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void 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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swapRedBlueChannels(raster->getRawData(), lx * ly);
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raster->unlock();
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}
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};
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// default imp generator
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std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
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{
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return std::make_shared<WIN32Implementation>(dim, shared);
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}
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//=============================================================================
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// XImplementation : implementazione offlineGL Server X (MACOSX & LINUX)
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//-----------------------------------------------------------------------------
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#elif defined(LINUX)
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class XImplementation : public TOfflineGL::Imp
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{
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public:
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Display *m_dpy;
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GLXContext m_context;
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GLXPixmap m_pixmap;
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Pixmap m_xpixmap;
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//-----------------------------------------------------------------------------
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XImplementation(TDimension rasterSize)
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{
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createContext(rasterSize);
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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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}
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//-----------------------------------------------------------------------------
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~XImplementation()
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{
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glXDestroyContext(m_dpy, m_context);
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m_context = 0;
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safeGlXMakeCurrent(true);
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XCloseDisplay(m_dpy);
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}
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//-----------------------------------------------------------------------------
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bool safeGlXMakeCurrent(bool isDtor = false)
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{
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static std::map<pthread_t, GLXContext> m_glxContext;
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static TThread::Mutex mutex;
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QMutexLocker sl(&mutex);
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pthread_t self = pthread_self();
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std::map<pthread_t, GLXContext>::iterator it = m_glxContext.find(self);
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if (((it != m_glxContext.end()) && (it->second != m_context)) || (it == m_glxContext.end())) {
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// cout << "calling GLXMakeCurrent " << self << " " << m_context << endl;
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Bool ret;
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if (!isDtor)
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ret = glXMakeCurrent(m_dpy, m_pixmap, m_context);
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m_glxContext[self] = m_context;
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return ret;
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}
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// cout << "don't call GLXMakeCurrent " << self << " " << m_context << endl;
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return true;
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}
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//-----------------------------------------------------------------------------
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void makeCurrent()
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{
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XScopedLock xsl;
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//Bool ret = glXMakeCurrent(m_dpy,m_pixmap,m_context);
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Bool ret = safeGlXMakeCurrent();
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assert(ret == True);
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}
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//-----------------------------------------------------------------------------
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// DA IMPLEMENTARE !!!
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void doneCurrent()
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{
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}
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//-----------------------------------------------------------------------------
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void createContext(TDimension rasterSize)
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{
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m_dpy = XOpenDisplay(NULL);
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Window win = DefaultRootWindow(m_dpy);
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int attribList[] = {
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GLX_RGBA,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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// GLX_ALPHA_SIZE, 1,
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GLX_STENCIL_SIZE, 8,
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// GLX_DEPTH_SIZE, 24,
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None};
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int dbAttrib[] = {GLX_RGBA,
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GLX_RED_SIZE, 1,
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GLX_GREEN_SIZE, 1,
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GLX_BLUE_SIZE, 1,
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GLX_STENCIL_SIZE, 8,
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GLX_DOUBLEBUFFER,
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None};
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int w = rasterSize.lx;
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int h = rasterSize.ly;
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XVisualInfo *vis = glXChooseVisual(m_dpy, DefaultScreen(m_dpy), attribList);
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if (!vis) {
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std::cout << "unable to create sb visual" << std::endl;
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vis = glXChooseVisual(m_dpy, DefaultScreen(m_dpy), dbAttrib);
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assert(vis && "unable to create db visual");
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}
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m_context = glXCreateContext(m_dpy, vis, 0, False);
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// std::cout << "Direct rendering: " << (glXIsDirect(m_dpy, m_context) ? "Yes" : "No" )<< std::endl;
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if (!m_context)
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assert("not m_context" && false);
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TRaster32P raster(w, h);
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m_xpixmap = XCreatePixmap(m_dpy, win, w, h, vis->depth);
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assert(m_xpixmap && "not m_xpixmap");
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m_pixmap = glXCreateGLXPixmap(m_dpy, vis, m_xpixmap);
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if (!m_pixmap)
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assert("not m_pixmap" && m_pixmap);
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/*
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Bool ret = glXMakeCurrent(m_dpy,
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m_pixmap,
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m_context);
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*/
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Bool ret = safeGlXMakeCurrent();
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assert(ret);
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m_raster = raster;
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}
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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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const TRaster32P &getRaster()
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{
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makeCurrent();
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glFlush();
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int lx = m_raster->getLx();
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int ly = m_raster->getLy();
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m_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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m_raster->getRawData());
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#if defined(MACOSX)
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rightRotateBits(m_raster->getRawData(), lx * ly);
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#warning "to do"
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#endif
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m_raster->unlock();
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return m_raster;
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}
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//-----------------------------------------------------------------------------
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int getLx() const
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{
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return m_raster->getLx();
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}
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//-----------------------------------------------------------------------------
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int getLy() const
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{
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return m_raster->getLy();
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}
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};
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std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
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{
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return std::make_shared<XImplementation>(dim);
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}
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#elif MACOSX
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std::shared_ptr<TOfflineGL::Imp> defaultOfflineGLGenerator(const TDimension &dim, std::shared_ptr<TOfflineGL::Imp> shared)
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{
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return std::make_shared<QtOfflineGL>(dim, shared);
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}
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#endif
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//=============================================================================
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//-----------------------------------------------------------------------------
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// current imp generator
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namespace
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{
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TOfflineGL::ImpGenerator *currentImpGenerator = defaultOfflineGLGenerator;
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} // namespace
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//=============================================================================
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// TOfflineGL
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//-----------------------------------------------------------------------------
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//namespace {
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class MessageCreateContext : public TThread::Message
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{
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friend class TOfflineGL;
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TOfflineGL *m_ogl;
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TDimension m_size;
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std::shared_ptr<TOfflineGL::Imp> m_shared;
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public:
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MessageCreateContext(TOfflineGL *ogl, const TDimension &size, std::shared_ptr<TOfflineGL::Imp> shared)
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: m_ogl(ogl), m_size(size), m_shared(std::move(shared)) {}
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void onDeliver()
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{
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m_ogl->m_imp = currentImpGenerator(m_size, m_shared);
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}
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TThread::Message *clone() const
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{
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return new MessageCreateContext(*this);
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}
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};
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//} // namespace
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//--------------------------------------------------
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TOfflineGL::TOfflineGL(TDimension dim, const TOfflineGL *shared)
|
|
{
|
|
#if defined(LINUX)
|
|
XScopedLock xsl;
|
|
#endif
|
|
|
|
std::shared_ptr<Imp> sharedImp = shared ? shared->m_imp : 0;
|
|
|
|
/*
|
|
元のコードは(別スレッドから呼び出すための) offline renderer を作って main thread に dispatch するという訳のわからないことをしていたが Q*GLContext は thread context を超えられないので直接生成してこのコンテキストで閉じる.
|
|
別スレッドには dispatch しない.
|
|
*/
|
|
m_imp = currentImpGenerator(dim, std::move(sharedImp));
|
|
|
|
initMatrix();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
TOfflineGL::TOfflineGL(const TRaster32P &raster, const TOfflineGL *shared)
|
|
{
|
|
#if defined(LINUX)
|
|
XScopedLock xsl;
|
|
#endif
|
|
|
|
m_imp = currentImpGenerator(raster->getSize(), shared->m_imp);
|
|
|
|
initMatrix();
|
|
|
|
glRasterPos2d(0, 0);
|
|
raster->lock();
|
|
glDrawPixels(raster->getLx(), raster->getLy(), GL_BGRA_EXT, GL_UNSIGNED_BYTE, raster->getRawData());
|
|
raster->unlock();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
TOfflineGL::~TOfflineGL()
|
|
{
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
TOfflineGL::ImpGenerator *TOfflineGL::defineImpGenerator(TOfflineGL::ImpGenerator *impGenerator)
|
|
{
|
|
TOfflineGL::ImpGenerator *ret = currentImpGenerator;
|
|
currentImpGenerator = impGenerator;
|
|
return ret;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::makeCurrent()
|
|
{
|
|
if (currentContextManager)
|
|
currentContextManager->store();
|
|
// Tutto il codice è stato spostato dentro Imp
|
|
m_imp->makeCurrent();
|
|
assert(glGetError() == GL_NO_ERROR);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::doneCurrent()
|
|
{
|
|
m_imp->doneCurrent();
|
|
if (currentContextManager) {
|
|
currentContextManager->restore();
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::initMatrix()
|
|
{
|
|
m_imp->makeCurrent();
|
|
|
|
// cfr. help: OpenGL/Programming tip/OpenGL Correctness Tips
|
|
glViewport(0, 0, m_imp->getLx(), m_imp->getLy());
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
gluOrtho2D(0, m_imp->getLx(), 0, m_imp->getLy());
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
//glTranslatef(0.375, 0.375, 0.0); //WRONG
|
|
|
|
/* (From Daniele)
|
|
|
|
Quoting from the aforementioned source:
|
|
|
|
"An optimum compromise that allows all primitives to be specified at integer
|
|
positions, while still ensuring predictable rasterization, is to translate x
|
|
and y by 0.375, as shown in the following code sample. Such a translation
|
|
keeps polygon and pixel image edges safely away from the centers of pixels,
|
|
while moving line vertices close enough to the pixel centers"
|
|
|
|
NOTE: This is not an acceptable excuse in our case - as we're NOT USING
|
|
INTEGER COORDINATES ONLY. OpenGL has all the rights to render pixels
|
|
at integer coordinates across the neighbouring 4 pixels - and their
|
|
(0.5, 0.5) translations at the EXACT screen pixel.
|
|
*/
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::clear(TPixel32 color)
|
|
{
|
|
const double maxValue = 255.0;
|
|
makeCurrent();
|
|
glClearColor(
|
|
(double)color.r / maxValue,
|
|
(double)color.g / maxValue,
|
|
(double)color.b / maxValue,
|
|
(double)color.m / maxValue);
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::draw(TVectorImageP image, const TVectorRenderData &rd, bool doInitMatrix)
|
|
{
|
|
checkErrorsByGL;
|
|
makeCurrent();
|
|
checkErrorsByGL;
|
|
|
|
if (doInitMatrix) {
|
|
initMatrix();
|
|
checkErrorsByGL;
|
|
}
|
|
|
|
if (image) {
|
|
checkErrorsByGL;
|
|
tglDraw(rd, image.getPointer());
|
|
checkErrorsByGL;
|
|
}
|
|
|
|
checkErrorsByGL;
|
|
glFlush();
|
|
checkErrorsByGL;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::draw(TRasterImageP ri, const TAffine &aff, bool doInitMatrix)
|
|
{
|
|
makeCurrent();
|
|
|
|
if (doInitMatrix)
|
|
initMatrix();
|
|
|
|
TRaster32P ras32 = ri->getRaster();
|
|
if (!ras32)
|
|
return;
|
|
|
|
int lx = ras32->getLx();
|
|
int ly = ras32->getLy();
|
|
// lx e ly devono essere potenze di due
|
|
assert((lx & (lx - 1)) == 0);
|
|
assert((ly & (ly - 1)) == 0);
|
|
|
|
glPushMatrix();
|
|
tglMultMatrix(aff);
|
|
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
|
|
glTexEnvf(GL_TEXTURE_ENV,
|
|
GL_TEXTURE_ENV_MODE,
|
|
GL_DECAL);
|
|
|
|
glEnable(GL_TEXTURE_2D);
|
|
|
|
/*
|
|
TNZ_MACHINE_CHANNEL_ORDER_BGRM
|
|
TNZ_MACHINE_CHANNEL_ORDER_MBGR
|
|
TNZ_MACHINE_CHANNEL_ORDER_RGBM
|
|
TNZ_MACHINE_CHANNEL_ORDER_MRGB
|
|
*/
|
|
|
|
GLenum fmt = TGL_FMT;
|
|
/*
|
|
#ifdef TNZ_MACHINE_CHANNEL_ORDER_BGRM
|
|
GL_BGRA_EXT;
|
|
#elif TNZ_MACHINE_CHANNEL_ORDER_MBGR
|
|
GL_ABGR_EXT;
|
|
#elif TNZ_MACHINE_CHANNEL_ORDER_RGBM
|
|
GL_RGBA;
|
|
#elif TNZ_MACHINE_CHANNEL_ORDER_MRGB
|
|
#warning "to do"
|
|
GL_ABGR_EXT;
|
|
#else
|
|
Error PLATFORM NOT SUPPORTED
|
|
#endif
|
|
*/
|
|
|
|
// Generate a texture id and bind it.
|
|
GLuint texId;
|
|
glGenTextures(1, &texId);
|
|
|
|
glBindTexture(GL_TEXTURE_2D, texId);
|
|
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH,
|
|
ras32->getWrap() != ras32->getLx() ? ras32->getWrap() : 0);
|
|
|
|
ras32->lock();
|
|
|
|
glTexImage2D(
|
|
GL_TEXTURE_2D, // target (is a 2D texture)
|
|
0, // is one level only
|
|
GL_RGB, // number of component of a pixel
|
|
lx, // size width
|
|
ly, // height
|
|
0, // size of a border
|
|
fmt,
|
|
GL_UNSIGNED_BYTE, //
|
|
ras32->getRawData());
|
|
|
|
ras32->unlock();
|
|
|
|
double halfWidth = 0.5 * lx;
|
|
double halfHeight = 0.5 * ly;
|
|
|
|
double dpix = 1, dpiy = 1;
|
|
ri->getDpi(dpix, dpiy);
|
|
|
|
if (dpix != 0 && dpiy != 0) {
|
|
double unit = 100;
|
|
halfWidth *= unit / dpix;
|
|
halfHeight *= unit / dpiy;
|
|
}
|
|
|
|
glBegin(GL_QUAD_STRIP);
|
|
glTexCoord2d(0, 0);
|
|
glVertex2d(-halfWidth, -halfHeight);
|
|
glTexCoord2d(1, 0);
|
|
glVertex2d(halfWidth, -halfHeight);
|
|
glTexCoord2d(0, 1);
|
|
glVertex2d(-halfWidth, halfHeight);
|
|
glTexCoord2d(1, 1);
|
|
glVertex2d(halfWidth, halfHeight);
|
|
glEnd();
|
|
glDisable(GL_TEXTURE_2D);
|
|
|
|
glPopMatrix();
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
|
|
|
|
// Delete texture
|
|
glDeleteTextures(1, &texId);
|
|
|
|
glFlush();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::flush()
|
|
{
|
|
makeCurrent();
|
|
glFlush();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::getRaster(TRaster32P raster)
|
|
{
|
|
assert(raster->getLx() <= getLx() && raster->getLy() <= getLy());
|
|
if (raster->getWrap() == raster->getLx()) {
|
|
m_imp->getRaster(raster);
|
|
} else {
|
|
//There are 2 possible solutions: use glReadPixels multiple times for each row of input raster,
|
|
//OR allocate a new contiguous buffer, use glReadPixels once, and then memcpy each row.
|
|
//It actually seems that the *latter* is actually the fastest solution, although it requires
|
|
//allocating a temporary buffer of the same size of the requested raster...
|
|
//I also could not actually manage to make the former work - the code seemed right but results were weird...
|
|
TRaster32P ras32(raster->getSize());
|
|
m_imp->getRaster(ras32);
|
|
TRop::copy(raster, ras32);
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
void TOfflineGL::getRaster(TRasterP raster)
|
|
{
|
|
assert(raster->getLx() <= getLx() && raster->getLy() <= getLy());
|
|
TRaster32P ras32 = raster;
|
|
if (ras32 && (raster->getWrap() == raster->getLx())) {
|
|
m_imp->getRaster(ras32);
|
|
} else {
|
|
ras32 = TRaster32P(raster->getSize());
|
|
m_imp->getRaster(ras32);
|
|
TRop::copy(raster, ras32);
|
|
}
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
TRaster32P TOfflineGL::getRaster()
|
|
{
|
|
TRaster32P raster(getLx(), getLy());
|
|
m_imp->getRaster(raster);
|
|
return raster;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
int TOfflineGL::getLx() const
|
|
{
|
|
return m_imp->getLx();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
int TOfflineGL::getLy() const
|
|
{
|
|
return m_imp->getLy();
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
//=============================================================================
|
|
|
|
namespace
|
|
{
|
|
|
|
struct DimensionLess : public std::binary_function<TDimension, TDimension, bool> {
|
|
bool operator()(const TDimension &d1, const TDimension &d2) const
|
|
{
|
|
return d1.lx < d2.lx || (d1.lx == d2.lx && d1.ly < d2.ly);
|
|
}
|
|
};
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
class OglStock
|
|
{ // singleton
|
|
|
|
typedef std::map<const TDimension, TOfflineGL *, DimensionLess> ContextMap;
|
|
ContextMap m_table;
|
|
|
|
OglStock() {}
|
|
|
|
public:
|
|
~OglStock()
|
|
{
|
|
/* // PER ADESSO, LASCIAMO IL MEMORY LEAK DATO CHE ALTRIMENTI VA IN CRASH
|
|
ContextMap::iterator it = m_table.begin();
|
|
for(; it!=m_table.end(); ++it)
|
|
{
|
|
delete it->second;
|
|
}
|
|
*/
|
|
}
|
|
|
|
TOfflineGL *get(const TDimension &d)
|
|
{
|
|
ContextMap::iterator it = m_table.find(d);
|
|
if (it == m_table.end()) {
|
|
TOfflineGL *glContext;
|
|
glContext = new TOfflineGL(d);
|
|
pair<ContextMap::iterator, bool> result = m_table.insert(ContextMap::value_type(d, glContext));
|
|
assert(result.second);
|
|
assert(m_table.size() < 15);
|
|
return glContext;
|
|
}
|
|
return it->second;
|
|
}
|
|
|
|
static OglStock *instance()
|
|
{
|
|
static OglStock singleton;
|
|
return &singleton;
|
|
}
|
|
};
|
|
|
|
} // namespace
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
TOfflineGL *TOfflineGL::getStock(const TDimension dim)
|
|
{
|
|
return OglStock::instance()->get(dim);
|
|
}
|