GLState &GLState::setScissor(Rectangleui const &newScissorRect)
{
Rectangleui cumulative;
if(scissor())
{
cumulative = scissorRect() & newScissorRect;
}
else
{
cumulative = newScissorRect;
}
d->props.set(Scissor, true);
d->props.set(ScissorX, cumulative.left());
d->props.set(ScissorY, cumulative.top());
d->props.set(ScissorWidth, cumulative.width());
d->props.set(ScissorHeight, cumulative.height());
return *this;
}
void
LayerManagerComposite::RenderToPresentationSurface()
{
#ifdef MOZ_WIDGET_ANDROID
nsIWidget* const widget = mCompositor->GetWidget()->RealWidget();
auto window = static_cast<ANativeWindow*>(
widget->GetNativeData(NS_PRESENTATION_WINDOW));
if (!window) {
return;
}
EGLSurface surface = widget->GetNativeData(NS_PRESENTATION_SURFACE);
if (!surface) {
//create surface;
surface = GLContextProviderEGL::CreateEGLSurface(window);
if (!surface) {
return;
}
widget->SetNativeData(NS_PRESENTATION_SURFACE,
reinterpret_cast<uintptr_t>(surface));
}
CompositorOGL* compositor = mCompositor->AsCompositorOGL();
GLContext* gl = compositor->gl();
GLContextEGL* egl = GLContextEGL::Cast(gl);
if (!egl) {
return;
}
const IntSize windowSize(ANativeWindow_getWidth(window),
ANativeWindow_getHeight(window));
#endif
if ((windowSize.width <= 0) || (windowSize.height <= 0)) {
return;
}
ScreenRotation rotation = compositor->GetScreenRotation();
const int actualWidth = windowSize.width;
const int actualHeight = windowSize.height;
const gfx::IntSize originalSize = compositor->GetDestinationSurfaceSize();
const nsIntRect originalRect = nsIntRect(0, 0, originalSize.width, originalSize.height);
int pageWidth = originalSize.width;
int pageHeight = originalSize.height;
if (rotation == ROTATION_90 || rotation == ROTATION_270) {
pageWidth = originalSize.height;
pageHeight = originalSize.width;
}
float scale = 1.0;
if ((pageWidth > actualWidth) || (pageHeight > actualHeight)) {
const float scaleWidth = (float)actualWidth / (float)pageWidth;
const float scaleHeight = (float)actualHeight / (float)pageHeight;
scale = scaleWidth <= scaleHeight ? scaleWidth : scaleHeight;
}
const gfx::IntSize actualSize(actualWidth, actualHeight);
ScopedCompostitorSurfaceSize overrideSurfaceSize(compositor, actualSize);
const ScreenPoint offset((actualWidth - (int)(scale * pageWidth)) / 2, 0);
ScopedContextSurfaceOverride overrideSurface(egl, surface);
Matrix viewMatrix = ComputeTransformForRotation(originalRect,
rotation);
viewMatrix.Invert(); // unrotate
viewMatrix.PostScale(scale, scale);
viewMatrix.PostTranslate(offset.x, offset.y);
Matrix4x4 matrix = Matrix4x4::From2D(viewMatrix);
mRoot->ComputeEffectiveTransforms(matrix);
nsIntRegion opaque;
LayerIntRegion visible;
PostProcessLayers(mRoot, opaque, visible, Nothing());
nsIntRegion invalid;
IntRect bounds = IntRect::Truncate(0, 0, scale * pageWidth, actualHeight);
IntRect rect, actualBounds;
MOZ_ASSERT(mRoot->GetOpacity() == 1);
mCompositor->BeginFrame(invalid, nullptr, bounds, nsIntRegion(), &rect, &actualBounds);
// The Java side of Fennec sets a scissor rect that accounts for
// chrome such as the URL bar. Override that so that the entire frame buffer
// is cleared.
ScopedScissorRect scissorRect(egl, 0, 0, actualWidth, actualHeight);
egl->fClearColor(0.0, 0.0, 0.0, 0.0);
egl->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
const IntRect clipRect = IntRect::Truncate(0, 0, actualWidth, actualHeight);
RootLayer()->Prepare(RenderTargetIntRect::FromUnknownRect(clipRect));
RootLayer()->RenderLayer(clipRect);
mCompositor->EndFrame();
}
void
LayerManagerComposite::RenderToPresentationSurface()
{
#ifdef MOZ_WIDGET_ANDROID
if (!AndroidBridge::Bridge()) {
return;
}
void* window = AndroidBridge::Bridge()->GetPresentationWindow();
if (!window) {
return;
}
EGLSurface surface = AndroidBridge::Bridge()->GetPresentationSurface();
if (!surface) {
//create surface;
surface = GLContextProviderEGL::CreateEGLSurface(window);
if (!surface) {
return;
}
AndroidBridge::Bridge()->SetPresentationSurface(surface);
}
CompositorOGL* compositor = static_cast<CompositorOGL*>(mCompositor.get());
GLContext* gl = compositor->gl();
GLContextEGL* egl = GLContextEGL::Cast(gl);
if (!egl) {
return;
}
const IntSize windowSize = AndroidBridge::Bridge()->GetNativeWindowSize(window);
#elif defined(MOZ_WIDGET_GONK)
CompositorOGL* compositor = static_cast<CompositorOGL*>(mCompositor.get());
nsScreenGonk* screen = static_cast<nsWindow*>(mCompositor->GetWidget())->GetScreen();
if (!screen->IsPrimaryScreen()) {
// Only primary screen support mirroring
return;
}
nsWindow* mirrorScreenWidget = screen->GetMirroringWidget();
if (!mirrorScreenWidget) {
// No mirroring
return;
}
nsScreenGonk* mirrorScreen = mirrorScreenWidget->GetScreen();
if (!mirrorScreen->GetTopWindows().IsEmpty()) {
return;
}
EGLSurface surface = mirrorScreen->GetEGLSurface();
if (surface == LOCAL_EGL_NO_SURFACE) {
// Create GLContext
nsRefPtr<GLContext> gl = gl::GLContextProvider::CreateForWindow(mirrorScreenWidget);
mirrorScreenWidget->SetNativeData(NS_NATIVE_OPENGL_CONTEXT,
reinterpret_cast<uintptr_t>(gl.get()));
surface = mirrorScreen->GetEGLSurface();
if (surface == LOCAL_EGL_NO_SURFACE) {
// Failed to create EGLSurface
return;
}
}
GLContext* gl = compositor->gl();
GLContextEGL* egl = GLContextEGL::Cast(gl);
const IntSize windowSize = mirrorScreen->GetNaturalBounds().Size();
#endif
if ((windowSize.width <= 0) || (windowSize.height <= 0)) {
return;
}
ScreenRotation rotation = compositor->GetScreenRotation();
const int actualWidth = windowSize.width;
const int actualHeight = windowSize.height;
const gfx::IntSize originalSize = compositor->GetDestinationSurfaceSize();
const nsIntRect originalRect = nsIntRect(0, 0, originalSize.width, originalSize.height);
int pageWidth = originalSize.width;
int pageHeight = originalSize.height;
if (rotation == ROTATION_90 || rotation == ROTATION_270) {
pageWidth = originalSize.height;
pageHeight = originalSize.width;
}
float scale = 1.0;
if ((pageWidth > actualWidth) || (pageHeight > actualHeight)) {
const float scaleWidth = (float)actualWidth / (float)pageWidth;
const float scaleHeight = (float)actualHeight / (float)pageHeight;
scale = scaleWidth <= scaleHeight ? scaleWidth : scaleHeight;
}
const gfx::IntSize actualSize(actualWidth, actualHeight);
ScopedCompostitorSurfaceSize overrideSurfaceSize(compositor, actualSize);
const ScreenPoint offset((actualWidth - (int)(scale * pageWidth)) / 2, 0);
ScopedContextSurfaceOverride overrideSurface(egl, surface);
Matrix viewMatrix = ComputeTransformForRotation(originalRect,
rotation);
viewMatrix.Invert(); // unrotate
viewMatrix.PostScale(scale, scale);
viewMatrix.PostTranslate(offset.x, offset.y);
Matrix4x4 matrix = Matrix4x4::From2D(viewMatrix);
mRoot->ComputeEffectiveTransforms(matrix);
nsIntRegion opaque;
ApplyOcclusionCulling(mRoot, opaque);
nsIntRegion invalid;
Rect bounds(0.0f, 0.0f, scale * pageWidth, (float)actualHeight);
Rect rect, actualBounds;
mCompositor->BeginFrame(invalid, nullptr, bounds, &rect, &actualBounds);
// The Java side of Fennec sets a scissor rect that accounts for
// chrome such as the URL bar. Override that so that the entire frame buffer
// is cleared.
ScopedScissorRect scissorRect(egl, 0, 0, actualWidth, actualHeight);
egl->fClearColor(0.0, 0.0, 0.0, 0.0);
egl->fClear(LOCAL_GL_COLOR_BUFFER_BIT);
const IntRect clipRect = IntRect(0, 0, actualWidth, actualHeight);
RootLayer()->Prepare(RenderTargetPixel::FromUntyped(clipRect));
RootLayer()->RenderLayer(clipRect);
mCompositor->EndFrame();
mCompositor->SetDispAcquireFence(mRoot); // Call after EndFrame()
#ifdef MOZ_WIDGET_GONK
nsRefPtr<Composer2D> composer2D;
composer2D = mCompositor->GetWidget()->GetComposer2D();
if (composer2D) {
composer2D->Render(mirrorScreenWidget);
}
#endif
}
// Updates the contents of the root layer texture that fall inside the updateRect
// and re-composits all sublayers.
void LayerRendererChromium::drawLayers(const IntRect& updateRect, const IntRect& visibleRect,
const IntRect& contentRect, const IntPoint& scrollPosition)
{
ASSERT(m_hardwareCompositing);
if (!m_rootLayer)
return;
makeContextCurrent();
GLC(glBindTexture(GL_TEXTURE_2D, m_rootLayerTextureId));
// If the size of the visible area has changed then allocate a new texture
// to store the contents of the root layer and adjust the projection matrix
// and viewport.
int visibleRectWidth = visibleRect.width();
int visibleRectHeight = visibleRect.height();
if (visibleRectWidth != m_rootLayerTextureWidth || visibleRectHeight != m_rootLayerTextureHeight) {
m_rootLayerTextureWidth = visibleRect.width();
m_rootLayerTextureHeight = visibleRect.height();
m_projectionMatrix = orthoMatrix(0, visibleRectWidth, visibleRectHeight, 0, -1000, 1000);
GLC(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_rootLayerTextureWidth, m_rootLayerTextureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0));
}
// The GL viewport covers the entire visible area, including the scrollbars.
GLC(glViewport(0, 0, visibleRectWidth, visibleRectHeight));
// Bind the common vertex attributes used for drawing all the layers.
LayerChromium::prepareForDraw(layerSharedValues());
// FIXME: These calls can be made once, when the compositor context is initialized.
GLC(glDisable(GL_DEPTH_TEST));
GLC(glDisable(GL_CULL_FACE));
GLC(glDepthFunc(GL_LEQUAL));
GLC(glClearStencil(0));
if (m_scrollPosition == IntPoint(-1, -1))
m_scrollPosition = scrollPosition;
IntPoint scrollDelta = toPoint(scrollPosition - m_scrollPosition);
// Scroll only when the updateRect contains pixels for the newly uncovered region to avoid flashing.
if ((scrollDelta.x() && updateRect.width() >= abs(scrollDelta.x()) && updateRect.height() >= contentRect.height())
|| (scrollDelta.y() && updateRect.height() >= abs(scrollDelta.y()) && updateRect.width() >= contentRect.width())) {
// Scrolling works as follows: We render a quad with the current root layer contents
// translated by the amount the page has scrolled since the last update and then read the
// pixels of the content area (visible area excluding the scroll bars) back into the
// root layer texture. The newly exposed area is subesquently filled as usual with
// the contents of the updateRect.
TransformationMatrix scrolledLayerMatrix;
#if PLATFORM(SKIA)
float scaleFactor = 1.0f;
#elif PLATFORM(CG)
// Because the contents of the OpenGL texture are inverted
// vertically compared to the Skia backend, we need to move
// the backing store in the opposite direction.
float scaleFactor = -1.0f;
#else
#error "Need to implement for your platform."
#endif
scrolledLayerMatrix.translate3d(0.5 * visibleRect.width() - scrollDelta.x(),
0.5 * visibleRect.height() + scaleFactor * scrollDelta.y(), 0);
scrolledLayerMatrix.scale3d(1, -1, 1);
useShader(m_scrollShaderProgram);
GLC(glUniform1i(m_scrollShaderSamplerLocation, 0));
LayerChromium::drawTexturedQuad(m_projectionMatrix, scrolledLayerMatrix,
visibleRect.width(), visibleRect.height(), 1,
m_scrollShaderMatrixLocation, -1);
GLC(glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, contentRect.width(), contentRect.height()));
m_scrollPosition = scrollPosition;
} else if (abs(scrollDelta.y()) > contentRect.height() || abs(scrollDelta.x()) > contentRect.width()) {
// Scrolling larger than the contentRect size does not preserve any of the pixels, so there is
// no need to copy framebuffer pixels back into the texture.
m_scrollPosition = scrollPosition;
}
// FIXME: The following check should go away when the compositor renders independently from its own thread.
// Ignore a 1x1 update rect at (0, 0) as that's used a way to kick off a redraw for the compositor.
if (!(!updateRect.x() && !updateRect.y() && updateRect.width() == 1 && updateRect.height() == 1)) {
// Update the root layer texture.
ASSERT((updateRect.x() + updateRect.width() <= m_rootLayerTextureWidth)
&& (updateRect.y() + updateRect.height() <= m_rootLayerTextureHeight));
#if PLATFORM(SKIA)
// Get the contents of the updated rect.
const SkBitmap bitmap = m_rootLayerCanvas->getDevice()->accessBitmap(false);
int rootLayerWidth = bitmap.width();
int rootLayerHeight = bitmap.height();
ASSERT(rootLayerWidth == updateRect.width() && rootLayerHeight == updateRect.height());
void* pixels = bitmap.getPixels();
// Copy the contents of the updated rect to the root layer texture.
GLC(glTexSubImage2D(GL_TEXTURE_2D, 0, updateRect.x(), updateRect.y(), updateRect.width(), updateRect.height(), GL_RGBA, GL_UNSIGNED_BYTE, pixels));
#elif PLATFORM(CG)
// Get the contents of the updated rect.
ASSERT(static_cast<int>(CGBitmapContextGetWidth(m_rootLayerCGContext.get())) == updateRect.width() && static_cast<int>(CGBitmapContextGetHeight(m_rootLayerCGContext.get())) == updateRect.height());
void* pixels = m_rootLayerBackingStore.data();
// Copy the contents of the updated rect to the root layer texture.
// The origin is at the lower left in Core Graphics' coordinate system. We need to correct for this here.
GLC(glTexSubImage2D(GL_TEXTURE_2D, 0,
updateRect.x(), m_rootLayerTextureHeight - updateRect.y() - updateRect.height(),
updateRect.width(), updateRect.height(),
GL_RGBA, GL_UNSIGNED_BYTE, pixels));
#else
#error "Need to implement for your platform."
#endif
}
glClearColor(0, 0, 1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Render the root layer using a quad that takes up the entire visible area of the window.
// We reuse the shader program used by ContentLayerChromium.
const ContentLayerChromium::SharedValues* contentLayerValues = contentLayerSharedValues();
useShader(contentLayerValues->contentShaderProgram());
GLC(glUniform1i(contentLayerValues->shaderSamplerLocation(), 0));
TransformationMatrix layerMatrix;
layerMatrix.translate3d(visibleRect.width() * 0.5f, visibleRect.height() * 0.5f, 0);
LayerChromium::drawTexturedQuad(m_projectionMatrix, layerMatrix,
visibleRect.width(), visibleRect.height(), 1,
contentLayerValues->shaderMatrixLocation(), contentLayerValues->shaderAlphaLocation());
// If culling is enabled then we will cull the backface.
GLC(glCullFace(GL_BACK));
// The orthographic projection is setup such that Y starts at zero and
// increases going down the page so we need to adjust the winding order of
// front facing triangles.
GLC(glFrontFace(GL_CW));
// The shader used to render layers returns pre-multiplied alpha colors
// so we need to send the blending mode appropriately.
GLC(glEnable(GL_BLEND));
GLC(glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA));
// Translate all the composited layers by the scroll position.
TransformationMatrix matrix;
matrix.translate3d(-m_scrollPosition.x(), -m_scrollPosition.y(), 0);
// Traverse the layer tree and update the layer transforms.
float opacity = 1;
const Vector<RefPtr<LayerChromium> >& sublayers = m_rootLayer->getSublayers();
size_t i;
for (i = 0; i < sublayers.size(); i++)
updateLayersRecursive(sublayers[i].get(), matrix, opacity);
m_rootVisibleRect = visibleRect;
// Enable scissoring to avoid rendering composited layers over the scrollbars.
GLC(glEnable(GL_SCISSOR_TEST));
FloatRect scissorRect(contentRect);
// The scissorRect should not include the scroll offset.
scissorRect.move(-m_scrollPosition.x(), -m_scrollPosition.y());
scissorToRect(scissorRect);
// Clear the stencil buffer to 0.
GLC(glClear(GL_STENCIL_BUFFER_BIT));
// Disable writes to the stencil buffer.
GLC(glStencilMask(0));
// Traverse the layer tree one more time to draw the layers.
for (i = 0; i < sublayers.size(); i++)
drawLayersRecursive(sublayers[i].get(), scissorRect);
GLC(glDisable(GL_SCISSOR_TEST));
m_gles2Context->swapBuffers();
m_needsDisplay = false;
}
