diff options
Diffstat (limited to 'src/core/compositor/display_gl_output_surface.cpp')
| -rw-r--r-- | src/core/compositor/display_gl_output_surface.cpp | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/src/core/compositor/display_gl_output_surface.cpp b/src/core/compositor/display_gl_output_surface.cpp new file mode 100644 index 000000000..5a78b8322 --- /dev/null +++ b/src/core/compositor/display_gl_output_surface.cpp @@ -0,0 +1,292 @@ +/**************************************************************************** +** +** Copyright (C) 2019 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtWebEngine module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "display_gl_output_surface.h" + +#include "chromium_gpu_helper.h" + +#include "base/threading/thread_task_runner_handle.h" +#include "components/viz/service/display/display.h" +#include "components/viz/service/display/output_surface_frame.h" +#include "gpu/command_buffer/client/gles2_implementation.h" +#include "gpu/command_buffer/client/gles2_interface.h" +#include "gpu/command_buffer/service/mailbox_manager.h" +#include "gpu/command_buffer/service/texture_base.h" +#include "gpu/ipc/in_process_command_buffer.h" +#include "ui/gl/color_space_utils.h" + +namespace QtWebEngineCore { + +DisplayGLOutputSurface::DisplayGLOutputSurface( + scoped_refptr<viz::VizProcessContextProvider> contextProvider, + viz::UpdateVSyncParametersCallback callback) + : OutputSurface(contextProvider) + , m_commandBuffer(contextProvider->command_buffer()) + , m_gl(contextProvider->ContextGL()) +{ + capabilities_.uses_default_gl_framebuffer = false; + m_gl->GenFramebuffers(1, &m_fboId); + contextProvider->SetUpdateVSyncParametersCallback(std::move(callback)); +} + +DisplayGLOutputSurface::~DisplayGLOutputSurface() +{ + m_gl->DeleteFramebuffers(1, &m_fboId); + if (m_sink) + m_sink->disconnect(this); +} + +// Called from viz::Display::Initialize. +void DisplayGLOutputSurface::BindToClient(viz::OutputSurfaceClient *client) +{ + m_display = static_cast<viz::Display *>(client); + m_sink = DisplayFrameSink::findOrCreate(m_display->frame_sink_id()); + m_sink->connect(this); +} + +// Triggered by ui::Compositor::SetVisible(true). +void DisplayGLOutputSurface::EnsureBackbuffer() +{ +} + +// Triggered by ui::Compositor::SetVisible(false). Framebuffer must be cleared. +void DisplayGLOutputSurface::DiscardBackbuffer() +{ + NOTIMPLEMENTED(); + // m_gl->DiscardBackbufferCHROMIUM(); +} + +// Called from viz::DirectRenderer::DrawFrame before rendering starts, but only +// if the parameters differ from the previous Reshape call. +// +// Parameters: +// +// - sizeInPixels comes from ui::Compositor::SetScaleAndSize via +// viz::HostContextFactoryPrivate::ResizeDisplay. +// +// - devicePixelRatio comes from viz::CompositorFrame::device_scale_factor() +// via viz::RootCompositorFrameSinkImpl::SubmitCompositorFrame and +// viz::Display::SetLocalSurfaceId. +// +// - colorSpace and hasAlpha correspond to the color_space and +// has_transparent_background properties of the root viz::RenderPass. +// +// - useStencil should create a stencil buffer, but this is only needed for +// overdraw feedback (--show-overdraw-feedback), so it's safe to ignore. +// Accordingly, capabilities_.supports_stencil should be set to false. +// +void DisplayGLOutputSurface::Reshape(const gfx::Size &sizeInPixels, + float devicePixelRatio, + const gfx::ColorSpace &colorSpace, + bool hasAlpha, + bool /*useStencil*/) +{ + m_currentShape = Shape{sizeInPixels, devicePixelRatio, colorSpace, hasAlpha}; + m_gl->ResizeCHROMIUM(sizeInPixels.width(), sizeInPixels.height(), devicePixelRatio, + gl::ColorSpaceUtils::GetGLColorSpace(colorSpace), hasAlpha); +} + +std::unique_ptr<DisplayGLOutputSurface::Buffer> DisplayGLOutputSurface::makeBuffer(const Shape &shape) +{ + std::unique_ptr<Buffer> buffer = std::make_unique<Buffer>(this); + buffer->shape = shape; + m_gl->GenTextures(1, &buffer->clientId); + m_gl->BindTexture(GL_TEXTURE_2D, buffer->clientId); + m_gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + m_gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + m_gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + m_gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + uint32_t width = shape.sizeInPixels.width(); + uint32_t height = shape.sizeInPixels.height(); + uint32_t format = shape.hasAlpha ? GL_RGBA : GL_RGB; + m_gl->TexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, nullptr); + return buffer; +} + +void DisplayGLOutputSurface::deleteBufferResources(Buffer *buffer) +{ + m_gl->DeleteTextures(1, &buffer->clientId); +} + +// Called by viz::GLRenderer during rendering whenever it switches to the root +// render pass. +void DisplayGLOutputSurface::BindFramebuffer() +{ + if (!m_backBuffer || m_backBuffer->shape != m_currentShape) + m_backBuffer = makeBuffer(m_currentShape); + + m_gl->BindFramebuffer(GL_FRAMEBUFFER, m_fboId); + m_gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_backBuffer->clientId, 0); +} + +// Called from viz::Display::DrawAndSwap after rendering. +// +// Parameters: +// +// - frame.size is the same as the size given to Reshape. +// +// - frame.sub_buffer_rect and frame.content_bounds are never used since these +// are only enabled if gl::GLSurface::SupportsPostSubBuffer() or +// gl::GLSurface::SupportsSwapBuffersWithBounds() are true, respectively, +// but this not the case for any offscreen gl::GLSurface. +// +// - frame.latency_info is viz::CompositorFrame::metadata.latency_info. +void DisplayGLOutputSurface::SwapBuffers(viz::OutputSurfaceFrame frame) +{ + DCHECK(frame.size == m_currentShape.sizeInPixels); + DCHECK(!frame.sub_buffer_rect.has_value()); + DCHECK(frame.content_bounds.empty()); + DCHECK(m_backBuffer); + + m_gl->BindFramebuffer(GL_FRAMEBUFFER, m_fboId); + m_gl->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0); + gpu::SyncToken syncToken; + m_gl->GenSyncTokenCHROMIUM(syncToken.GetData()); + + unsigned int clientId = m_backBuffer->clientId; + + // Now some thread-hopping: + // + // - We start here on the viz thread (client side of command buffer). + // + // - Then we'll jump to the gpu thread (service side of command buffer) to + // get the real OpenGL texture id. + // + // - Then we'll get a call from the Qt Quick Scene Graph thread (could be + // a separate thread or the main thread). + // + // - Finally we'll return to the viz thread to acknowledge the swap. + + { + QMutexLocker locker(&m_mutex); + m_taskRunner = base::ThreadTaskRunnerHandle::Get(); + m_middleBuffer = std::move(m_backBuffer); + m_middleBuffer->serviceId = 0; + } + + m_commandBuffer->GetTextureQt( + clientId, + base::BindOnce(&DisplayGLOutputSurface::swapBuffersOnGpuThread, base::Unretained(this)), + std::vector<gpu::SyncToken>{syncToken}); +} + +void DisplayGLOutputSurface::swapBuffersOnGpuThread(unsigned int id, std::unique_ptr<gl::GLFence> fence) +{ + { + QMutexLocker locker(&m_mutex); + m_middleBuffer->serviceId = id; + m_middleBuffer->fence = CompositorResourceFence::create(std::move(fence)); + } + + m_sink->scheduleUpdate(); +} + +void DisplayGLOutputSurface::swapBuffersOnVizThread() +{ + { + QMutexLocker locker(&m_mutex); + m_backBuffer = std::move(m_middleBuffer); + } + + m_display->DidReceiveSwapBuffersAck(); + m_display->DidReceivePresentationFeedback( + gfx::PresentationFeedback(base::TimeTicks::Now(), base::TimeDelta(), + gfx::PresentationFeedback::Flags::kVSync)); +} + +void DisplayGLOutputSurface::SetDrawRectangle(const gfx::Rect &) +{ +} + +// Returning nullptr here effectively disables viz::OverlayProcessor. +viz::OverlayCandidateValidator *DisplayGLOutputSurface::GetOverlayCandidateValidator() const +{ + return nullptr; +} + +// Returning true here will cause viz::GLRenderer to try to render the output +// surface as an overlay plane (see viz::DirectRenderer::DrawFrame and +// viz::GLRenderer::ScheduleOverlays). +bool DisplayGLOutputSurface::IsDisplayedAsOverlayPlane() const +{ + return false; +} + +// Only used if IsDisplayedAsOverlayPlane was true (called from +// viz::GLRenderer::ScheduleOverlays). +unsigned DisplayGLOutputSurface::GetOverlayTextureId() const +{ + return 0; +} + +// Only used if IsDisplayedAsOverlayPlane was true (called from +// viz::DirectRender::DrawFrame). +gfx::BufferFormat DisplayGLOutputSurface::GetOverlayBufferFormat() const +{ + return gfx::BufferFormat(); +} + +// Called by viz::GLRenderer but always false in all implementations except for +// android_webview::ParentOutputSurface. +bool DisplayGLOutputSurface::HasExternalStencilTest() const +{ + return false; +} + +// Only called if HasExternalStencilTest was true. Dead code? +void DisplayGLOutputSurface::ApplyExternalStencil() +{ + NOTREACHED(); +} + +// Called from GLRenderer::GetFramebufferCopyTextureFormat when using +// glCopyTexSubImage2D on our framebuffer. +uint32_t DisplayGLOutputSurface::GetFramebufferCopyTextureFormat() +{ + return GL_RGBA; +} + +// Called from viz::DirectRenderer::DrawFrame, only used for overlays. +unsigned DisplayGLOutputSurface::UpdateGpuFence() +{ + NOTREACHED(); + return 0; +} + +} // namespace QtWebEngineCore |