isSurfaceValid    619 Source/core/html/HTMLCanvasElement.cpp     return m_imageBuffer && m_imageBuffer->isSurfaceValid();
isSurfaceValid     96 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    136 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    155 Source/platform/graphics/ImageBuffer.cpp     if (!m_surface->isAccelerated() || !platformLayer() || !isSurfaceValid())
isSurfaceValid    236 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    242 Source/platform/graphics/ImageBuffer.cpp     if (!context->isAccelerated() && m_surface->isAccelerated() && m_surface->cachedBitmapEnabled() && isSurfaceValid()) {
isSurfaceValid    262 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    277 Source/platform/graphics/ImageBuffer.cpp     if (context()->isAccelerated() || !isSurfaceValid())
isSurfaceValid    334 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    341 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    348 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid())
isSurfaceValid    407 Source/platform/graphics/ImageBuffer.cpp     if (!isSurfaceValid() || !encodeImage(m_surface->bitmap(), mimeType, quality, &encodedImage))
isSurfaceValid     89 Source/platform/graphics/ImageBuffer.h     bool isSurfaceValid() const;