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// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SRC_DAWN_NATIVE_OPENGL_DISPLAYEGL_H_
#define SRC_DAWN_NATIVE_OPENGL_DISPLAYEGL_H_
#include <memory>
#include "absl/types/span.h" // TODO(343500108): Use std::span when we have C++20.
#include "dawn/common/DynamicLib.h"
#include "dawn/common/NonMovable.h"
#include "dawn/common/egl_platform.h"
#include "dawn/native/opengl/EGLFunctions.h"
namespace dawn::native::opengl {
static constexpr EGLConfig kNoConfig = 0;
// Represents a connection to an EGL driver, with its EGLDisplay, its functions and other metadata
// global to EGL.
class DisplayEGL : NonMovable {
public:
static ResultOrError<std::unique_ptr<DisplayEGL>> CreateFromDynamicLoading(
wgpu::BackendType backend,
const char* libName);
static ResultOrError<std::unique_ptr<DisplayEGL>>
CreateFromProcAndDisplay(wgpu::BackendType backend, EGLGetProcProc getProc, EGLDisplay display);
explicit DisplayEGL(wgpu::BackendType backend);
~DisplayEGL();
// A convenience ref to avoid having to call an accessor function every time we need to use EGL
const EGLFunctions& egl;
EGLDisplay GetDisplay() const;
EGLint GetAPIEnum() const;
EGLint GetAPIBit() const;
absl::Span<const wgpu::TextureFormat> GetPotentialSurfaceFormats() const;
// Chooses an EGLConfig that works for that surface type and color format.
EGLConfig ChooseConfig(EGLint surfaceType,
wgpu::TextureFormat color,
wgpu::TextureFormat depthStencil = wgpu::TextureFormat::Undefined) const;
private:
MaybeError InitializeWithDynamicLoading(const char* libName);
MaybeError InitializeWithProcAndDisplay(EGLGetProcProc getProc, EGLDisplay display);
DynamicLib mLib;
EGLFunctions mFunctions;
EGLDisplay mDisplay = EGL_NO_DISPLAY;
EGLint mApiEnum;
EGLint mApiBit;
// Different from mApiBit because renderables don't make a difference between GLES 2 and 3
EGLint mRenderableBit;
};
} // namespace dawn::native::opengl
#endif // SRC_DAWN_NATIVE_OPENGL_DISPLAYEGL_H_