Make OGLFrameGrabber work

Steps of grabFrame
- Init opengl context
- Call libgltf to render
- Get a RGB buffer from libgltf
- Create a Bitmap from this RGB buffer

Additionally:
- Using mimetype is neccessary to decide which player to create.
- bAllowToCreateReplacementGraphic is unneeded.

Change-Id: I7fef043a3341771389144a4f4cac71b0862ef8a7

1 files changed, 25 insertions, 5 deletions

diff --git a/avmedia/source/opengl/oglframegrabber.cxx b/avmedia/source/opengl/oglframegrabber.cxx
index 2aeda9720b8e..81be9c138826 100644
--- a/avmedia/source/opengl/oglframegrabber.cxx
+++ b/avmedia/source/opengl/oglframegrabber.cxx
@@ -12,13 +12,16 @@
 #include <cppuhelper/supportsservice.hxx>
 #include <vcl/bitmapex.hxx>
 #include <vcl/graph.hxx>
+#include <vcl/salbtype.hxx>
+#include <vcl/bmpacc.hxx>
 
 using namespace com::sun::star;
 
 namespace avmedia { namespace ogl {
 
-OGLFrameGrabber::OGLFrameGrabber( const OUString& /*rUrl*/ )
+OGLFrameGrabber::OGLFrameGrabber(  glTFHandle* pHandle )
     : FrameGrabber_BASE()
+    , m_pHandle( pHandle )
 {
 }
 
@@ -26,12 +29,29 @@ OGLFrameGrabber::~OGLFrameGrabber()
 {
 }
 
-uno::Reference< css::graphic::XGraphic > SAL_CALL OGLFrameGrabber::grabFrame( double /*fMediaTime*/ )
+uno::Reference< css::graphic::XGraphic > SAL_CALL OGLFrameGrabber::grabFrame( double fMediaTime )
         throw ( uno::RuntimeException, std::exception )
 {
-    // TODO: Here we need a bitmap of the model at the point specified by fMediaTime
-    // See com::sun::star::media::XFrameGrabber
-    BitmapEx aBitmap;
+    // TODO: libgltf should provide an RGBA buffer, not just an RGB one. See: OpenGLRender::GetAsBitmap().
+    char* pBuffer = new char[m_pHandle->viewport.width * m_pHandle->viewport.height * 3];
+    gltf_renderer_get_bitmap(m_pHandle, fMediaTime, pBuffer, 800, 600);
+    Bitmap aBitmap( Size(m_pHandle->viewport.width, m_pHandle->viewport.height), 24 );
+    {
+        Bitmap::ScopedWriteAccess pWriteAccess( aBitmap );
+        size_t nCurPos = 0;
+        for( int y = 0; y < m_pHandle->viewport.height; ++y)
+        {
+            Scanline pScan = pWriteAccess->GetScanline(y);
+            for( int x = 0; x < m_pHandle->viewport.width; ++x )
+            {
+                *pScan++ = pBuffer[nCurPos];
+                *pScan++ = pBuffer[nCurPos+1];
+                *pScan++ = pBuffer[nCurPos+2];
+                nCurPos += 3;
+            }
+        }
+    }
+    delete [] pBuffer;
     return Graphic( aBitmap ).GetXGraphic();
 }