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- // Copyright 2020 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/base/x/x11_gl_egl_utility.h"
- #include "ui/base/x/x11_util.h"
- #include "ui/gl/gl_surface_egl.h"
- #ifndef EGL_ANGLE_x11_visual
- #define EGL_ANGLE_x11_visual 1
- #define EGL_X11_VISUAL_ID_ANGLE 0x33A3
- #endif /* EGL_ANGLE_x11_visual */
- #ifndef EGL_ANGLE_platform_angle_null
- #define EGL_ANGLE_platform_angle_null 1
- #define EGL_PLATFORM_ANGLE_TYPE_NULL_ANGLE 0x33AE
- #endif /* EGL_ANGLE_platform_angle_null */
- #ifndef EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE
- #define EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE 0x348F
- #endif
- #ifndef EGL_PLATFORM_ANGLE_DEVICE_TYPE_SWIFTSHADER_ANGLE
- #define EGL_PLATFORM_ANGLE_DEVICE_TYPE_SWIFTSHADER_ANGLE 0x3487
- #endif
- #ifndef EGL_ANGLE_platform_angle
- #define EGL_ANGLE_platform_angle 1
- #define EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE 0x348F
- #endif /* EGL_ANGLE_platform_angle */
- #ifndef EGL_EXT_platform_x11
- #define EGL_EXT_platform_x11 1
- #define EGL_PLATFORM_X11_EXT 0x31D5
- #endif /* EGL_EXT_platform_x11 */
- namespace ui {
- void GetPlatformExtraDisplayAttribs(EGLenum platform_type,
- std::vector<EGLAttrib>* attributes) {
- // ANGLE_NULL and SwiftShader backends don't use the visual,
- // and may run without X11 where we can't get it anyway.
- if ((platform_type != EGL_PLATFORM_ANGLE_TYPE_NULL_ANGLE) &&
- (std::find(attributes->begin(), attributes->end(),
- EGL_PLATFORM_ANGLE_DEVICE_TYPE_SWIFTSHADER_ANGLE) ==
- attributes->end())) {
- x11::VisualId visual_id;
- XVisualManager::GetInstance()->ChooseVisualForWindow(
- true, &visual_id, nullptr, nullptr, nullptr);
- attributes->push_back(EGL_X11_VISUAL_ID_ANGLE);
- attributes->push_back(static_cast<EGLAttrib>(visual_id));
- attributes->push_back(EGL_PLATFORM_ANGLE_NATIVE_PLATFORM_TYPE_ANGLE);
- attributes->push_back(EGL_PLATFORM_X11_EXT);
- }
- }
- void ChoosePlatformCustomAlphaAndBufferSize(EGLint* alpha_size,
- EGLint* buffer_size) {
- // If we're using ANGLE_NULL, we may not have a display, in which case we
- // can't use XVisualManager.
- if (gl::GLSurfaceEGL::GetGLDisplayEGL()->GetNativeDisplay().GetDisplay() !=
- EGL_DEFAULT_DISPLAY) {
- uint8_t depth;
- XVisualManager::GetInstance()->ChooseVisualForWindow(true, nullptr, &depth,
- nullptr, nullptr);
- *buffer_size = depth;
- *alpha_size = *buffer_size == 32 ? 8 : 0;
- }
- }
- bool IsTransparentBackgroundSupported() {
- return ui::XVisualManager::GetInstance()->ArgbVisualAvailable();
- }
- } // namespace ui
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