C++ (Cpp) CPDF_MeshStream::GetVertex Beispiele

Beispiel #1

Datei: fpdf_render_pattern.cpp Projekt: primiano/pdfium-merge

static void DrawFreeGouraudShading(CFX_DIBitmap* pBitmap,
                                   CFX_Matrix* pObject2Bitmap,
                                   CPDF_Stream* pShadingStream,
                                   CPDF_Function** pFuncs,
                                   int nFuncs,
                                   CPDF_ColorSpace* pCS,
                                   int alpha) {
  ASSERT(pBitmap->GetFormat() == FXDIB_Argb);

  CPDF_MeshStream stream;
  if (!stream.Load(pShadingStream, pFuncs, nFuncs, pCS))
    return;

  CPDF_MeshVertex triangle[3];
  FXSYS_memset(triangle, 0, sizeof(triangle));

  while (!stream.m_BitStream.IsEOF()) {
    CPDF_MeshVertex vertex;
    FX_DWORD flag = stream.GetVertex(vertex, pObject2Bitmap);
    if (flag == 0) {
      triangle[0] = vertex;
      for (int j = 1; j < 3; j++) {
        stream.GetVertex(triangle[j], pObject2Bitmap);
      }
    } else {
      if (flag == 1) {
        triangle[0] = triangle[1];
      }
      triangle[1] = triangle[2];
      triangle[2] = vertex;
    }
    DrawGouraud(pBitmap, alpha, triangle);
  }
}