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// Copyright 2022 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,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "dawn/native/opengl/ContextEGL.h"
#include <memory>
#include <string>
#include <vector>
#include "dawn/native/opengl/UtilsEGL.h"
#ifndef EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE
#define EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE 0x33AF
#endif
namespace dawn::native::opengl {
ResultOrError<std::unique_ptr<ContextEGL>> ContextEGL::Create(const EGLFunctions& egl,
EGLenum api,
EGLDisplay display,
bool useANGLETextureSharing) {
EGLint renderableType = api == EGL_OPENGL_ES_API ? EGL_OPENGL_ES3_BIT : EGL_OPENGL_BIT;
EGLint major, minor;
DAWN_TRY(CheckEGL(egl, egl.Initialize(display, &major, &minor), "eglInitialize"));
// We use EGLImage unconditionally, which only became core in 1.5.
DAWN_INVALID_IF(major < 1 || (major == 1 && minor < 5),
"EGL version (%u.%u) must be at least 1.5", major, minor);
// Since we're creating a surfaceless context, the only thing we really care
// about is the RENDERABLE_TYPE.
EGLint config_attribs[] = {EGL_RENDERABLE_TYPE, renderableType, EGL_NONE};
EGLint num_config;
EGLConfig config;
DAWN_TRY(CheckEGL(egl, egl.ChooseConfig(display, config_attribs, &config, 1, &num_config),
"eglChooseConfig"));
DAWN_INVALID_IF(num_config == 0, "eglChooseConfig returned zero configs");
DAWN_TRY(CheckEGL(egl, egl.BindAPI(api), "eglBindAPI"));
if (api == EGL_OPENGL_ES_API) {
major = 3;
minor = 1;
} else {
major = 4;
minor = 4;
}
const char* extensions = egl.QueryString(display, EGL_EXTENSIONS);
if (strstr(extensions, "EGL_EXT_create_context_robustness") == nullptr) {
return DAWN_INTERNAL_ERROR("EGL_EXT_create_context_robustness must be supported");
}
std::vector<EGLint> attrib_list{
EGL_CONTEXT_MAJOR_VERSION,
major,
EGL_CONTEXT_MINOR_VERSION,
minor,
EGL_CONTEXT_OPENGL_ROBUST_ACCESS, // Core in EGL 1.5
EGL_TRUE,
};
if (useANGLETextureSharing) {
if (strstr(extensions, "EGL_ANGLE_display_texture_share_group") == nullptr) {
return DAWN_INTERNAL_ERROR(
"GL_ANGLE_display_texture_share_group must be supported to use GL texture sharing");
}
attrib_list.push_back(EGL_DISPLAY_TEXTURE_SHARE_GROUP_ANGLE);
attrib_list.push_back(EGL_TRUE);
}
attrib_list.push_back(EGL_NONE);
EGLContext context = egl.CreateContext(display, config, EGL_NO_CONTEXT, attrib_list.data());
DAWN_TRY(CheckEGL(egl, context != EGL_NO_CONTEXT, "eglCreateContext"));
return std::unique_ptr<ContextEGL>(new ContextEGL(egl, display, context));
}
void ContextEGL::MakeCurrent() {
egl.MakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, mContext);
}
ContextEGL::~ContextEGL() {
egl.DestroyContext(mDisplay, mContext);
}
} // namespace dawn::native::opengl