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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gl/init/gl_factory.h"
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/notreached.h"
#include "base/trace_event/trace_event.h"
#include "ui/gl/android/scoped_a_native_window.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_context_egl.h"
#include "ui/gl/gl_context_stub.h"
#include "ui/gl/gl_egl_api_implementation.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_share_group.h"
#include "ui/gl/gl_surface.h"
#include "ui/gl/gl_surface_egl.h"
#include "ui/gl/gl_surface_stub.h"
#include "ui/gl/gl_utils.h"
namespace gl {
namespace init {
namespace {
// Used to render into an already current context+surface,
// that we do not have ownership of (draw callback).
// TODO(boliu): Make this inherit from GLContextEGL.
class GLNonOwnedContext : public GLContextReal {
public:
explicit GLNonOwnedContext(GLShareGroup* share_group);
GLNonOwnedContext(const GLNonOwnedContext&) = delete;
GLNonOwnedContext& operator=(const GLNonOwnedContext&) = delete;
// Implement GLContext.
bool InitializeImpl(GLSurface* compatible_surface,
const GLContextAttribs& attribs) override;
bool MakeCurrentImpl(GLSurface* surface) override;
void ReleaseCurrent(GLSurface* surface) override {}
bool IsCurrent(GLSurface* surface) override;
void* GetHandle() override { return nullptr; }
protected:
~GLNonOwnedContext() override { OnContextWillDestroy(); }
private:
EGLDisplay display_;
};
GLNonOwnedContext::GLNonOwnedContext(GLShareGroup* share_group)
: GLContextReal(share_group), display_(nullptr) {}
bool GLNonOwnedContext::InitializeImpl(GLSurface* compatible_surface,
const GLContextAttribs& attribs) {
display_ = eglGetDisplay(EGL_DEFAULT_DISPLAY);
return true;
}
bool GLNonOwnedContext::MakeCurrentImpl(GLSurface* surface) {
BindGLApi();
SetCurrent(surface);
InitializeDynamicBindings();
return true;
}
bool GLNonOwnedContext::IsCurrent(GLSurface* surface) {
return GetRealCurrent() == this;
}
} // namespace
std::vector<GLImplementationParts> GetAllowedGLImplementations() {
static bool use_passthrough =
gl::UsePassthroughCommandDecoder(base::CommandLine::ForCurrentProcess());
std::vector<GLImplementationParts> impls;
if (use_passthrough) {
impls.emplace_back(kGLImplementationEGLANGLE);
} else {
impls.emplace_back(kGLImplementationEGLGLES2);
}
return impls;
}
bool GetGLWindowSystemBindingInfo(const GLVersionInfo& gl_info,
GLWindowSystemBindingInfo* info) {
switch (GetGLImplementation()) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
return GetGLWindowSystemBindingInfoEGL(info);
default:
return false;
}
}
scoped_refptr<GLContext> CreateGLContext(GLShareGroup* share_group,
GLSurface* compatible_surface,
const GLContextAttribs& attribs) {
TRACE_EVENT0("gpu", "gl::init::CreateGLContext");
switch (GetGLImplementation()) {
case kGLImplementationMockGL:
case kGLImplementationStubGL: {
scoped_refptr<GLContextStub> stub_context =
MakeRefCounted<GLContextStub>(share_group);
if (GetGLImplementation() == kGLImplementationStubGL) {
stub_context->SetUseStubApi(true);
}
// The stub ctx needs to be initialized so that the gl::GLContext can
// store the |compatible_surface|.
stub_context->Initialize(compatible_surface, attribs);
return stub_context;
}
case kGLImplementationDisabled:
NOTREACHED();
default:
if (compatible_surface->GetHandle() ||
compatible_surface->IsSurfaceless()) {
return InitializeGLContext(new GLContextEGL(share_group),
compatible_surface, attribs);
} else {
return InitializeGLContext(new GLNonOwnedContext(share_group),
compatible_surface, attribs);
}
}
}
scoped_refptr<GLSurface> CreateViewGLSurface(GLDisplay* display,
gfx::AcceleratedWidget window) {
TRACE_EVENT0("gpu", "gl::init::CreateViewGLSurface");
CHECK_NE(kGLImplementationNone, GetGLImplementation());
switch (GetGLImplementation()) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
if (window != gfx::kNullAcceleratedWidget) {
return InitializeGLSurface(new NativeViewGLSurfaceEGL(
display->GetAs<gl::GLDisplayEGL>(),
ScopedANativeWindow::Wrap(window), nullptr));
} else {
return InitializeGLSurface(new GLSurfaceStub());
}
default:
NOTREACHED();
}
}
scoped_refptr<GLSurface> CreateOffscreenGLSurface(GLDisplay* display,
const gfx::Size& size) {
TRACE_EVENT0("gpu", "gl::init::CreateOffscreenGLSurface");
CHECK_NE(kGLImplementationNone, GetGLImplementation());
switch (GetGLImplementation()) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE: {
GLDisplayEGL* display_egl = display->GetAs<gl::GLDisplayEGL>();
if (display_egl->IsEGLSurfacelessContextSupported() &&
(size.width() == 0 && size.height() == 0)) {
return InitializeGLSurface(new SurfacelessEGL(display_egl, size));
} else {
return InitializeGLSurface(new PbufferGLSurfaceEGL(display_egl, size));
}
}
case kGLImplementationMockGL:
case kGLImplementationStubGL:
return InitializeGLSurface(new GLSurfaceStub());
default:
NOTREACHED();
}
}
void SetDisabledExtensionsPlatform(const std::string& disabled_extensions) {
GLImplementation implementation = GetGLImplementation();
DCHECK_NE(kGLImplementationNone, implementation);
switch (implementation) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
SetDisabledExtensionsEGL(disabled_extensions);
break;
case kGLImplementationMockGL:
case kGLImplementationStubGL:
break;
default:
NOTREACHED();
}
}
bool InitializeExtensionSettingsOneOffPlatform(GLDisplay* display) {
GLImplementation implementation = GetGLImplementation();
DCHECK_NE(kGLImplementationNone, implementation);
switch (implementation) {
case kGLImplementationEGLGLES2:
case kGLImplementationEGLANGLE:
return InitializeExtensionSettingsOneOffEGL(
static_cast<GLDisplayEGL*>(display));
case kGLImplementationMockGL:
case kGLImplementationStubGL:
return true;
default:
NOTREACHED();
}
}
} // namespace init
} // namespace gl
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