vcl: Initial work to have native widgets rendered with OpenGL

Change-Id: I8b244a5bdd12a64a65ca1bab14dfe6917a175ccf

1 files changed, 139 insertions, 0 deletions

diff --git a/vcl/opengl/x11/gdiimpl.cxx b/vcl/opengl/x11/gdiimpl.cxx
new file mode 100644
index 000000000000..11735edb271c
--- /dev/null
+++ b/vcl/opengl/x11/gdiimpl.cxx
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "vcl/salbtype.hxx"
+
+#include "unx/pixmap.hxx"
+#include "unx/saldisp.hxx"
+#include "unx/salframe.h"
+#include "unx/salgdi.h"
+#include "unx/salvd.h"
+
+#include "opengl/x11/gdiimpl.hxx"
+
+#include <vcl/opengl/OpenGLContext.hxx>
+#include <vcl/opengl/OpenGLHelper.hxx>
+
+X11OpenGLSalGraphicsImpl::X11OpenGLSalGraphicsImpl( X11SalGraphics& rParent ):
+    OpenGLSalGraphicsImpl(),
+    mrParent(rParent)
+{
+}
+
+X11OpenGLSalGraphicsImpl::~X11OpenGLSalGraphicsImpl()
+{
+}
+
+GLfloat X11OpenGLSalGraphicsImpl::GetWidth() const
+{
+    if( mrParent.m_pFrame )
+        return mrParent.m_pFrame->maGeometry.nWidth;
+    else if( mrParent.m_pVDev )
+    {
+        long nWidth = 0;
+        long nHeight = 0;
+        mrParent.m_pVDev->GetSize( nWidth, nHeight );
+        return nWidth;
+    }
+    return 1;
+}
+
+GLfloat X11OpenGLSalGraphicsImpl::GetHeight() const
+{
+    if( mrParent.m_pFrame )
+        return mrParent.m_pFrame->maGeometry.nHeight;
+    else if( mrParent.m_pVDev )
+    {
+        long nWidth = 0;
+        long nHeight = 0;
+        mrParent.m_pVDev->GetSize( nWidth, nHeight );
+        return nHeight;
+    }
+    return 1;
+}
+
+void X11OpenGLSalGraphicsImpl::Init()
+{
+    if( mrParent.m_pFrame && dynamic_cast<X11WindowProvider*>(mrParent.m_pFrame) )
+    {
+        Window aWin = dynamic_cast<X11WindowProvider*>(mrParent.m_pFrame)->GetX11Window();
+        maContext.init( mrParent.GetXDisplay(), aWin, mrParent.m_nXScreen.getXScreen());
+    }
+    else if( mrParent.m_pVDev )
+    {
+        maContext.init( mrParent.GetXDisplay(), mrParent.m_pVDev->GetDrawable(),
+                        mrParent.m_pVDev->GetWidth(), mrParent.m_pVDev->GetHeight(),
+                        mrParent.m_nXScreen.getXScreen() );
+    }
+    else
+    {
+        SAL_WARN( "vcl.opengl", "what happened here?" );
+    }
+}
+
+X11Pixmap* X11OpenGLSalGraphicsImpl::GetPixmapFromScreen( const Rectangle& rRect )
+{
+    Display* pDisplay = mrParent.GetXDisplay();
+    SalX11Screen nScreen = mrParent.GetScreenNumber();
+
+    SAL_INFO( "vcl.opengl", "GetPixmapFromScreen" );
+    return new X11Pixmap( pDisplay, nScreen, rRect.GetWidth(), rRect.GetHeight(), 24 );
+}
+
+bool X11OpenGLSalGraphicsImpl::RenderPixmapToScreen( X11Pixmap* pPixmap, int nX, int nY )
+{
+    const int aAttribs[] = {
+        GLX_TEXTURE_TARGET_EXT, GLX_TEXTURE_2D_EXT,
+        GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGB_EXT,
+        None
+    };
+    Display* pDisplay = mrParent.GetXDisplay();
+    GLXFBConfig pFbConfig;
+    GLXPixmap pGlxPixmap;
+    GLuint nTexture;
+    SalTwoRect aPosAry;
+    bool bInverted;
+
+    SAL_INFO( "vcl.opengl", "RenderPixmapToScreen (" << nX << " " << nY << ")" );
+
+    aPosAry.mnSrcX = 0;
+    aPosAry.mnSrcY = 0;
+    aPosAry.mnDestX = nX;
+    aPosAry.mnDestY = nY;
+    aPosAry.mnSrcWidth = aPosAry.mnDestWidth = pPixmap->GetWidth();
+    aPosAry.mnSrcHeight = aPosAry.mnDestHeight = pPixmap->GetHeight();
+
+    XSync( pDisplay, 0 );
+    pFbConfig = OpenGLHelper::GetPixmapFBConfig( pDisplay, bInverted );
+    pGlxPixmap = glXCreatePixmap( pDisplay, pFbConfig, pPixmap->GetPixmap(), aAttribs);
+    XSync( pDisplay, 0 );
+
+    maContext.makeCurrent();
+    glViewport( 0, 0, GetWidth(), GetHeight() );
+
+    glGenTextures( 1, &nTexture );
+    glActiveTexture( GL_TEXTURE0 );
+    glBindTexture( GL_TEXTURE_2D, nTexture );
+
+    //TODO: lfrb: glXGetProc to get the functions
+    glXBindTexImageEXT( pDisplay, pGlxPixmap, GLX_FRONT_LEFT_EXT, NULL );
+
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+    glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+
+    DrawTexture( nTexture, pPixmap->GetSize(), aPosAry );
+
+    glXReleaseTexImageEXT( pDisplay, pGlxPixmap, GLX_FRONT_LEFT_EXT );
+    glDeleteTextures( 1, &nTexture );
+    glXDestroyPixmap( pDisplay, pGlxPixmap );
+
+    return true;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */