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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/ozone/platform/cast/gl_surface_cast.h"
#include <memory>
#include <string>
#include <utility>
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/strings/string_number_conversions.h"
#include "chromecast/base/cast_features.h"
#include "chromecast/base/chromecast_switches.h"
#include "ui/gfx/vsync_provider.h"
#include "ui/ozone/common/egl_util.h"
#include "ui/ozone/platform/cast/gl_ozone_egl_cast.h"
namespace {
// Target fixed 30fps, or 60fps if doing triple-buffer 720p.
// TODO(halliwell): We might need to customize this value on various devices
// or make it dynamic that throttles framerate if device is overheating.
base::TimeDelta GetVSyncInterval() {
if (chromecast::IsFeatureEnabled(chromecast::kTripleBuffer720)) {
return base::Seconds(1) / 59.94;
}
base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
if (command_line->HasSwitch(switches::kVSyncInterval)) {
const std::string interval_str =
command_line->GetSwitchValueASCII(switches::kVSyncInterval);
double interval = 0;
if (base::StringToDouble(interval_str, &interval) && interval > 0) {
return base::Seconds(1) / interval;
}
}
return base::Seconds(2) / 59.94;
}
} // namespace
namespace ui {
GLSurfaceCast::GLSurfaceCast(gl::GLDisplayEGL* display,
gfx::AcceleratedWidget widget,
GLOzoneEglCast* parent)
: NativeViewGLSurfaceEGL(
display,
parent->GetNativeWindow(),
std::make_unique<gfx::FixedVSyncProvider>(base::TimeTicks(),
GetVSyncInterval())),
widget_(widget),
parent_(parent),
supports_swap_buffer_with_bounds_(
base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableSwapBuffersWithBounds)),
uses_triple_buffering_(
chromecast::IsFeatureEnabled(chromecast::kTripleBuffer720)) {
DCHECK(parent_);
}
bool GLSurfaceCast::SupportsSwapBuffersWithBounds() {
return supports_swap_buffer_with_bounds_;
}
gfx::SwapResult GLSurfaceCast::SwapBuffersWithBounds(
const std::vector<gfx::Rect>& rects,
PresentationCallback callback) {
DCHECK(supports_swap_buffer_with_bounds_);
// TODO(halliwell): Request new EGL extension so we're not abusing
// SwapBuffersWithDamage here.
std::vector<int> rects_data(rects.size() * 4);
for (size_t i = 0; i != rects.size(); ++i) {
rects_data[i * 4 + 0] = rects[i].x();
rects_data[i * 4 + 1] = rects[i].y();
rects_data[i * 4 + 2] = rects[i].width();
rects_data[i * 4 + 3] = rects[i].height();
}
return NativeViewGLSurfaceEGL::SwapBuffersWithDamage(rects_data,
std::move(callback));
}
bool GLSurfaceCast::Resize(const gfx::Size& size,
float scale_factor,
const gfx::ColorSpace& color_space,
bool has_alpha) {
return parent_->ResizeDisplay(size) &&
NativeViewGLSurfaceEGL::Resize(size, scale_factor, color_space,
has_alpha);
}
EGLConfig GLSurfaceCast::GetConfig() {
if (!config_) {
EGLint config_attribs[] = {EGL_BUFFER_SIZE,
32,
EGL_ALPHA_SIZE,
8,
EGL_BLUE_SIZE,
8,
EGL_GREEN_SIZE,
8,
EGL_RED_SIZE,
8,
EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_SURFACE_TYPE,
EGL_WINDOW_BIT,
EGL_NONE};
config_ = ChooseEGLConfig(GetEGLDisplay(), config_attribs);
}
return config_;
}
int GLSurfaceCast::GetBufferCount() const {
return uses_triple_buffering_ ? 3 : 2;
}
GLSurfaceCast::~GLSurfaceCast() {
Destroy();
}
} // namespace ui
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