void
LayerManagerOGL::SetupPipeline(int aWidth, int aHeight, WorldTransforPolicy aTransformPolicy)
{
// Set the viewport correctly.
mGLContext->fViewport(0, 0, aWidth, aHeight);
// We flip the view matrix around so that everything is right-side up; we're
// drawing directly into the window's back buffer, so this keeps things
// looking correct.
//
// XXX: We keep track of whether the window size changed, so we could skip
// this update if it hadn't changed since the last call. We will need to
// track changes to aTransformPolicy and mWorldMatrix for this to work
// though.
// Matrix to transform (0, 0, aWidth, aHeight) to viewport space (-1.0, 1.0,
// 2, 2) and flip the contents.
gfxMatrix viewMatrix;
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
CompositorOGL::PrepareViewport(const gfx::IntSize& aSize,
const gfxMatrix& aWorldTransform)
{
// Set the viewport correctly.
mGLContext->fViewport(0, 0, aSize.width, aSize.height);
// We flip the view matrix around so that everything is right-side up; we're
// drawing directly into the window's back buffer, so this keeps things
// looking correct.
// XXX: We keep track of whether the window size changed, so we could skip
// this update if it hadn't changed since the last call. We will need to
// track changes to aTransformPolicy and aWorldTransform for this to work
// though.
// Matrix to transform (0, 0, aWidth, aHeight) to viewport space (-1.0, 1.0,
// 2, 2) and flip the contents.
gfxMatrix viewMatrix;
viewMatrix.Translate(-gfxPoint(1.0, -1.0));
viewMatrix.Scale(2.0f / float(aSize.width), 2.0f / float(aSize.height));
viewMatrix.Scale(1.0f, -1.0f);
if (!mTarget) {
viewMatrix.Translate(gfxPoint(mRenderOffset.x, mRenderOffset.y));
}
viewMatrix = aWorldTransform * viewMatrix;
gfx3DMatrix matrix3d = gfx3DMatrix::From2D(viewMatrix);
matrix3d._33 = 0.0f;
SetLayerProgramProjectionMatrix(matrix3d);
}
