/**
* Recover the z component from a 2d transformed point by finding the intersection
* of a line through the point in the z direction and the transformed plane.
*
* We want to solve:
*
* point = normal . (p0 - l0) / normal . l
*/
static gfxFloat RecoverZDepth(const gfx3DMatrix& aTransform, const gfxPoint& aPoint)
{
const gfxPoint3D l(0, 0, 1);
gfxPoint3D l0 = gfxPoint3D(aPoint.x, aPoint.y, 0);
gfxPoint3D p0 = aTransform.Transform3D(gfxPoint3D(0, 0, 0));
gfxPoint3D normal = aTransform.GetNormalVector();
gfxFloat n = normal.DotProduct(p0 - l0);
gfxFloat d = normal.DotProduct(l);
if (!d) {
return 0;
}
return n/d;
}
static void
SampleValue(float aPortion, Animation& aAnimation, nsStyleAnimation::Value& aStart,
nsStyleAnimation::Value& aEnd, Animatable* aValue)
{
nsStyleAnimation::Value interpolatedValue;
NS_ASSERTION(aStart.GetUnit() == aEnd.GetUnit() ||
aStart.GetUnit() == nsStyleAnimation::eUnit_None ||
aEnd.GetUnit() == nsStyleAnimation::eUnit_None, "Must have same unit");
nsStyleAnimation::Interpolate(aAnimation.property(), aStart, aEnd,
aPortion, interpolatedValue);
if (aAnimation.property() == eCSSProperty_opacity) {
*aValue = interpolatedValue.GetFloatValue();
return;
}
nsCSSValueList* interpolatedList = interpolatedValue.GetCSSValueListValue();
TransformData& data = aAnimation.data().get_TransformData();
nsPoint origin = data.origin();
// we expect all our transform data to arrive in css pixels, so here we must
// adjust to dev pixels.
double cssPerDev = double(nsDeviceContext::AppUnitsPerCSSPixel())
/ double(data.appUnitsPerDevPixel());
gfxPoint3D mozOrigin = data.mozOrigin();
mozOrigin.x = mozOrigin.x * cssPerDev;
mozOrigin.y = mozOrigin.y * cssPerDev;
gfxPoint3D perspectiveOrigin = data.perspectiveOrigin();
perspectiveOrigin.x = perspectiveOrigin.x * cssPerDev;
perspectiveOrigin.y = perspectiveOrigin.y * cssPerDev;
nsDisplayTransform::FrameTransformProperties props(interpolatedList,
mozOrigin,
perspectiveOrigin,
data.perspective());
gfx3DMatrix transform =
nsDisplayTransform::GetResultingTransformMatrix(props, origin,
data.appUnitsPerDevPixel(),
&data.bounds());
gfxPoint3D scaledOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(origin.x, data.appUnitsPerDevPixel())),
NS_round(NSAppUnitsToFloatPixels(origin.y, data.appUnitsPerDevPixel())),
0.0f);
transform.Translate(scaledOrigin);
InfallibleTArray<TransformFunction> functions;
functions.AppendElement(TransformMatrix(transform));
*aValue = functions;
}
bool
LayerTransactionParent::RecvGetTransform(PLayerParent* aParent,
gfx3DMatrix* aTransform)
{
if (mDestroyed || !layer_manager() || layer_manager()->IsDestroyed()) {
return false;
}
// The following code recovers the untranslated transform
// from the shadow transform by undoing the translations in
// AsyncCompositionManager::SampleValue.
Layer* layer = cast(aParent)->AsLayer();
if (!layer) {
return false;
}
gfx::To3DMatrix(layer->AsLayerComposite()->GetShadowTransform(), *aTransform);
if (ContainerLayer* c = layer->AsContainerLayer()) {
aTransform->ScalePost(1.0f/c->GetInheritedXScale(),
1.0f/c->GetInheritedYScale(),
1.0f);
}
float scale = 1;
gfxPoint3D scaledOrigin;
gfxPoint3D transformOrigin;
for (uint32_t i=0; i < layer->GetAnimations().Length(); i++) {
if (layer->GetAnimations()[i].data().type() == AnimationData::TTransformData) {
const TransformData& data = layer->GetAnimations()[i].data().get_TransformData();
scale = data.appUnitsPerDevPixel();
scaledOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(data.origin().x, scale)),
NS_round(NSAppUnitsToFloatPixels(data.origin().y, scale)),
0.0f);
transformOrigin = data.transformOrigin();
break;
}
}
aTransform->Translate(-scaledOrigin);
*aTransform = nsLayoutUtils::ChangeMatrixBasis(-scaledOrigin - transformOrigin, *aTransform);
return true;
}
bool
LayerTransactionParent::RecvGetAnimationTransform(PLayerParent* aParent,
MaybeTransform* aTransform)
{
if (mDestroyed || !layer_manager() || layer_manager()->IsDestroyed()) {
return false;
}
Layer* layer = cast(aParent)->AsLayer();
if (!layer) {
return false;
}
// This method is specific to transforms applied by animation.
// This is because this method uses the information stored with an animation
// such as the origin of the reference frame corresponding to the layer, to
// recover the untranslated transform from the shadow transform. For
// transforms that are not set by animation we don't have this information
// available.
if (!layer->AsLayerComposite()->GetShadowTransformSetByAnimation()) {
*aTransform = mozilla::void_t();
return true;
}
// The following code recovers the untranslated transform
// from the shadow transform by undoing the translations in
// AsyncCompositionManager::SampleValue.
Matrix4x4 transform = layer->AsLayerComposite()->GetShadowTransform();
if (ContainerLayer* c = layer->AsContainerLayer()) {
// Undo the scale transform applied by AsyncCompositionManager::SampleValue
transform.ScalePost(1.0f/c->GetInheritedXScale(),
1.0f/c->GetInheritedYScale(),
1.0f);
}
float scale = 1;
gfxPoint3D scaledOrigin;
gfxPoint3D transformOrigin;
for (uint32_t i=0; i < layer->GetAnimations().Length(); i++) {
if (layer->GetAnimations()[i].data().type() == AnimationData::TTransformData) {
const TransformData& data = layer->GetAnimations()[i].data().get_TransformData();
scale = data.appUnitsPerDevPixel();
scaledOrigin =
gfxPoint3D(NS_round(NSAppUnitsToFloatPixels(data.origin().x, scale)),
NS_round(NSAppUnitsToFloatPixels(data.origin().y, scale)),
0.0f);
double cssPerDev =
double(nsDeviceContext::AppUnitsPerCSSPixel()) / double(scale);
transformOrigin = data.transformOrigin() * cssPerDev;
break;
}
}
// Undo the translation to the origin of the reference frame applied by
// AsyncCompositionManager::SampleValue
transform.Translate(-scaledOrigin.x, -scaledOrigin.y, -scaledOrigin.z);
// Undo the rebasing applied by
// nsDisplayTransform::GetResultingTransformMatrixInternal
gfxPoint3D basis = -scaledOrigin - transformOrigin;
transform.ChangeBasis(basis.x, basis.y, basis.z);
// Convert to CSS pixels (this undoes the operations performed by
// nsStyleTransformMatrix::ProcessTranslatePart which is called from
// nsDisplayTransform::GetResultingTransformMatrix)
double devPerCss =
double(scale) / double(nsDeviceContext::AppUnitsPerCSSPixel());
transform._41 *= devPerCss;
transform._42 *= devPerCss;
transform._43 *= devPerCss;
*aTransform = transform;
return true;
}
void
LayerPropertiesBase::MoveBy(const nsIntPoint& aOffset)
{
mTransform.TranslatePost(gfxPoint3D(aOffset.x, aOffset.y, 0));
}
void
ThebesLayerD3D10::FillTexturesBlackWhite(const nsIntRegion& aRegion, const nsIntPoint& aOffset)
{
if (mTexture && mTextureOnWhite) {
// It would be more optimal to draw the actual geometry, but more code
// and probably not worth the win here as this will often be a single
// rect.
nsRefPtr<ID3D10RenderTargetView> oldRT;
device()->OMGetRenderTargets(1, getter_AddRefs(oldRT), NULL);
nsRefPtr<ID3D10RenderTargetView> viewBlack;
nsRefPtr<ID3D10RenderTargetView> viewWhite;
device()->CreateRenderTargetView(mTexture, NULL, getter_AddRefs(viewBlack));
device()->CreateRenderTargetView(mTextureOnWhite, NULL, getter_AddRefs(viewWhite));
D3D10_RECT oldScissor;
UINT numRects = 1;
device()->RSGetScissorRects(&numRects, &oldScissor);
D3D10_TEXTURE2D_DESC desc;
mTexture->GetDesc(&desc);
D3D10_RECT scissor = { 0, 0, desc.Width, desc.Height };
device()->RSSetScissorRects(1, &scissor);
mD3DManager->SetupInputAssembler();
nsIntSize oldVP = mD3DManager->GetViewport();
mD3DManager->SetViewport(nsIntSize(desc.Width, desc.Height));
ID3D10RenderTargetView *views[2] = { viewBlack, viewWhite };
device()->OMSetRenderTargets(2, views, NULL);
gfx3DMatrix transform;
transform.Translate(gfxPoint3D(-aOffset.x, -aOffset.y, 0));
void* raw = &const_cast<gfx3DMatrix&>(transform)._11;
effect()->GetVariableByName("mLayerTransform")->SetRawValue(raw, 0, 64);
ID3D10EffectTechnique *technique =
effect()->GetTechniqueByName("PrepareAlphaExtractionTextures");
nsIntRegionRectIterator iter(aRegion);
const nsIntRect *iterRect;
while ((iterRect = iter.Next())) {
effect()->GetVariableByName("vLayerQuad")->AsVector()->SetFloatVector(
ShaderConstantRectD3D10(
(float)iterRect->x,
(float)iterRect->y,
(float)iterRect->width,
(float)iterRect->height)
);
technique->GetPassByIndex(0)->Apply(0);
device()->Draw(4, 0);
}
views[0] = oldRT;
device()->OMSetRenderTargets(1, views, NULL);
mD3DManager->SetViewport(oldVP);
device()->RSSetScissorRects(1, &oldScissor);
}
}
