Attachment #548075 for bug #505115

Attachment #548075: Part 7: Layers support for 3d transforms v2 for bug #505115

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  PRBool useIntermediateSurface;
  float opacity = GetEffectiveOpacity();
  if (opacity != 1.0f && HasMultipleChildren()) {
    useIntermediateSurface = PR_TRUE;
  } else {
    useIntermediateSurface = PR_FALSE;
    gfxMatrix contTransform;
    if (!mEffectiveTransform.Is2D(&contTransform)) {
     useIntermediateSurface = PR_TRUE;   
    } else if (
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
        !contTransform.PreservesAxisAlignedRectangles()) {
#else
        contTransform.HasNonIntegerTranslation()) {
#endif
      for (Layer* child = GetFirstChild(); child; child = child->GetNextSibling()) {
        const nsIntRect *clipRect = child->GetEffectiveClipRect();
        /* We can't (easily) forward our transform to children with a non-empty clip






  gfx3DMatrix projection;
  /*
   * Matrix to transform to viewport space ( <-1.0, 1.0> topleft,
   * <1.0, -1.0> bottomright)
   */
  projection._11 = 2.0f / aViewport.width;
  projection._22 = -2.0f / aViewport.height;
  projection._33 = 0.0f;
  projection._41 = -1.0f;
  projection._42 = 1.0f;
  projection._44 = 1.0f;

  HRESULT hr = mEffect->GetVariableByName("mProjection")->
    SetRawValue(&projection._11, 0, 64);

  if (FAILED(hr)) {






  gfx3DMatrix viewMatrix;
  /*
   * Matrix to transform to viewport space ( <-1.0, 1.0> topleft,
   * <1.0, -1.0> bottomright)
   */
  viewMatrix._11 = 2.0f / rect.width;
  viewMatrix._22 = -2.0f / rect.height;
  viewMatrix._33 = 0.0f;
  viewMatrix._41 = -1.0f;
  viewMatrix._42 = 1.0f;

  HRESULT hr = device()->SetVertexShaderConstantF(CBmProjection,
                                                  &viewMatrix._11, 4);

  if (FAILED(hr)) {
    NS_WARNING("Failed to set projection shader constant!");





  viewMatrix.Translate(-gfxPoint(1.0, -1.0));
  viewMatrix.Scale(2.0f / float(aWidth), 2.0f / float(aHeight));
  viewMatrix.Scale(1.0f, -1.0f);

  if (aTransformPolicy == ApplyWorldTransform) {
    viewMatrix = mWorldMatrix * viewMatrix;
  }

  gfx3DMatrix matrix3d = gfx3DMatrix::From2D(viewMatrix);
  matrix3d._33 = 0.0f;

  SetLayerProgramProjectionMatrix(matrix3d);
}

void
LayerManagerOGL::SetupBackBuffer(int aWidth, int aHeight)
{
  if (mGLContext->IsDoubleBuffered()) {
    mGLContext->fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
    return;





                           aContainerParameters, &newTransformMatrix);
}

nsDisplayItem::LayerState
nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder,
                                  LayerManager* aManager) {
  if (mFrame->AreLayersMarkedActive(nsChangeHint_UpdateTransformLayer))
    return LAYER_ACTIVE;
  if (!GetTransform(mFrame->PresContext()->AppUnitsPerDevPixel()).Is2D())
    return LAYER_ACTIVE;
  nsIFrame* activeScrolledRoot =
    nsLayoutUtils::GetActiveScrolledRootFor(mFrame, nsnull);
  return !mStoredList.ChildrenCanBeInactive(aBuilder, 
                                             aManager, 
                                             *mStoredList.GetList(), 
                                             activeScrolledRoot)
      ? LAYER_ACTIVE : LAYER_INACTIVE;
}

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