| // Copyright 2017 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/x11/gl_surface_egl_ozone_x11.h" |
| |
| #include "ui/gfx/x/x11.h" |
| #include "ui/gfx/x/x11_types.h" |
| #include "ui/gl/egl_util.h" |
| |
| namespace ui { |
| |
| GLSurfaceEGLOzoneX11::GLSurfaceEGLOzoneX11(EGLNativeWindowType window) |
| : NativeViewGLSurfaceEGL(window, nullptr) {} |
| |
| EGLConfig GLSurfaceEGLOzoneX11::GetConfig() { |
| // 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; |
| EGLint config_attribs[] = {EGL_BUFFER_SIZE, |
| ~0, // To be replaced. |
| 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}; |
| |
| // Get the depth of XWindow for surface. |
| XWindowAttributes win_attribs; |
| if (XGetWindowAttributes(gfx::GetXDisplay(), window_, &win_attribs)) { |
| config_attribs[kBufferSizeOffset] = win_attribs.depth; |
| } |
| |
| EGLDisplay display = GetDisplay(); |
| |
| EGLConfig config; |
| EGLint num_configs; |
| if (!eglChooseConfig(display, config_attribs, &config, 1, &num_configs)) { |
| LOG(ERROR) << "eglChooseConfig failed with error " |
| << GetLastEGLErrorString(); |
| return nullptr; |
| } |
| |
| if (num_configs > 0) { |
| EGLint config_depth; |
| if (!eglGetConfigAttrib(display, config, EGL_BUFFER_SIZE, &config_depth)) { |
| LOG(ERROR) << "eglGetConfigAttrib failed with error " |
| << GetLastEGLErrorString(); |
| return nullptr; |
| } |
| if (config_depth == config_attribs[kBufferSizeOffset]) { |
| return config; |
| } |
| } |
| |
| // Try without an alpha channel. |
| config_attribs[kAlphaSizeOffset] = 0; |
| if (!eglChooseConfig(display, config_attribs, &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 GLSurfaceEGLOzoneX11::Resize(const gfx::Size& size, |
| float scale_factor, |
| ColorSpace color_space, |
| bool has_alpha) { |
| if (size == GetSize()) |
| return true; |
| |
| size_ = size; |
| |
| eglWaitGL(); |
| XResizeWindow(gfx::GetXDisplay(), window_, size.width(), size.height()); |
| eglWaitNative(EGL_CORE_NATIVE_ENGINE); |
| |
| return true; |
| } |
| |
| GLSurfaceEGLOzoneX11::~GLSurfaceEGLOzoneX11() { |
| Destroy(); |
| } |
| |
| } // namespace ui |