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// Copyright 2015 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/gl_surface_egl_x11_gles2.h"
#include "ui/base/x/x11_util.h"
#include "ui/gfx/x/connection.h"
#include "ui/gfx/x/visual_manager.h"
#include "ui/gfx/x/xproto.h"
#include "ui/gl/egl_util.h"
#include "ui/gl/gl_bindings.h"
using ui::GetLastEGLErrorString;
namespace gl {
NativeViewGLSurfaceEGLX11GLES2::NativeViewGLSurfaceEGLX11GLES2(
gl::GLDisplayEGL* display,
x11::Window window)
: NativeViewGLSurfaceEGLX11(display, x11::Window::None),
parent_window_(window) {}
bool NativeViewGLSurfaceEGLX11GLES2::InitializeNativeWindow() {
auto* connection = GetXNativeConnection();
auto geometry = connection->GetGeometry(parent_window_).Sync();
if (!geometry) {
LOG(ERROR) << "GetGeometry failed for window "
<< static_cast<uint32_t>(parent_window_) << ".";
return false;
}
size_ = gfx::Size(geometry->width, geometry->height);
// Create a child window, with a CopyFromParent visual (to avoid inducing
// extra blits in the driver), that we can resize exactly in Resize(),
// correctly ordered with GL, so that we don't have invalid transient states.
// See https://crbug.com/326995.
set_window(connection->GenerateId<x11::Window>());
connection->CreateWindow(x11::CreateWindowRequest{
.wid = window(),
.parent = parent_window_,
.width = static_cast<uint16_t>(size_.width()),
.height = static_cast<uint16_t>(size_.height()),
.c_class = x11::WindowClass::InputOutput,
.background_pixmap = x11::Pixmap::None,
.bit_gravity = x11::Gravity::NorthWest,
.event_mask = x11::EventMask::Exposure,
});
connection->MapWindow({window()});
connection->Flush();
return true;
}
void NativeViewGLSurfaceEGLX11GLES2::Destroy() {
NativeViewGLSurfaceEGLX11::Destroy();
if (window_) {
auto* connection = GetXNativeConnection();
connection->DestroyWindow({window()});
window_ = 0;
connection->Flush();
}
}
EGLConfig NativeViewGLSurfaceEGLX11GLES2::GetConfig() {
if (!config_) {
// Get a config compatible with the window
DCHECK(window_);
auto* connection = GetXNativeConnection();
auto geometry = connection->GetGeometry(window()).Sync();
if (!geometry)
return nullptr;
// Try matching the window depth with an alpha channel,
// because we're worried the destination alpha width could
// constrain blending precision.
const int kBufferSizeOffset = 1;
const int kAlphaSizeOffset = 3;
std::array<EGLint, 15> config_attribs{
{EGL_BUFFER_SIZE, ~0, 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_PBUFFER_BIT,
EGL_NONE}};
config_attribs[kBufferSizeOffset] = geometry->depth;
EGLDisplay display = GLSurfaceEGL::GetGLDisplayEGL()->GetDisplay();
x11::VisualId visual_id;
connection->GetOrCreateVisualManager().ChooseVisualForWindow(
true, &visual_id, nullptr, nullptr, nullptr);
EGLint num_configs;
if (!eglChooseConfig(display, config_attribs.data(), nullptr, 0,
&num_configs)) {
LOG(ERROR) << "eglChooseConfig failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
std::vector<EGLConfig> configs(num_configs);
if (num_configs) {
if (!eglChooseConfig(display, config_attribs.data(), &configs.front(),
num_configs, &num_configs)) {
LOG(ERROR) << "eglChooseConfig failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
for (EGLConfig config : configs) {
EGLint config_depth;
if (!eglGetConfigAttrib(display, config, EGL_BUFFER_SIZE,
&config_depth)) {
LOG(ERROR) << "eglGetConfigAttrib failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
EGLint config_visual_id;
if (!eglGetConfigAttrib(display, config, EGL_NATIVE_VISUAL_ID,
&config_visual_id)) {
LOG(ERROR) << "eglGetConfigAttrib failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
if (config_depth == geometry->depth &&
config_visual_id == static_cast<EGLint>(visual_id)) {
config_ = config;
return config_;
}
}
}
// Try without an alpha channel.
config_attribs[kAlphaSizeOffset] = 0;
if (!eglChooseConfig(display, config_attribs.data(), &config_, 1,
&num_configs)) {
LOG(ERROR) << "eglChooseConfig failed with error "
<< GetLastEGLErrorString();
return nullptr;
}
if (num_configs == 0) {
LOG(ERROR) << "No suitable EGL configs found.";
return nullptr;
}
}
return config_;
}
bool NativeViewGLSurfaceEGLX11GLES2::Resize(const gfx::Size& size,
float scale_factor,
const gfx::ColorSpace& color_space,
bool has_alpha) {
if (size == GetSize())
return true;
size_ = size;
eglWaitGL();
auto* connection = GetXNativeConnection();
connection->ConfigureWindow({
.window = window(),
.width = size.width(),
.height = size.height(),
});
connection->Flush();
eglWaitNative(EGL_CORE_NATIVE_ENGINE);
return true;
}
void NativeViewGLSurfaceEGLX11GLES2::OnEvent(const x11::Event& x11_event) {
auto* expose = x11_event.As<x11::ExposeEvent>();
auto window = static_cast<x11::Window>(window_);
if (!expose || expose->window != window)
return;
auto expose_copy = *expose;
expose_copy.window = parent_window_;
x11::Connection::Get()->SendEvent(expose_copy, parent_window_,
x11::EventMask::Exposure);
x11::Connection::Get()->Flush();
}
NativeViewGLSurfaceEGLX11GLES2::~NativeViewGLSurfaceEGLX11GLES2() {
InvalidateWeakPtrs();
Destroy();
}
} // namespace gl
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