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/*
* Copyright (C) 2025 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "GraphicsContextGLTextureMapperAndroid.h"
#if ENABLE(WEBGL) && USE(COORDINATED_GRAPHICS) && OS(ANDROID)
#include "ANGLEHeaders.h"
#include "GLFence.h"
#include "Logging.h"
#include "PlatformDisplay.h"
#include "TextureMapperFlags.h"
#include <android/hardware_buffer.h>
namespace WebCore {
RefPtr<GraphicsContextGLTextureMapperAndroid> GraphicsContextGLTextureMapperAndroid::create(GraphicsContextGLAttributes&& attributes)
{
auto context = adoptRef(new GraphicsContextGLTextureMapperAndroid(WTFMove(attributes)));
if (!context->initialize())
return nullptr;
return context;
}
bool GraphicsContextGLTextureMapperAndroid::platformInitializeExtensions()
{
if (!enableExtensionsImpl({ "GL_OES_EGL_image"_s }))
return false;
const auto& eglExtensions = PlatformDisplay::sharedDisplay().eglExtensions();
return eglExtensions.KHR_image_base && eglExtensions.ANDROID_get_native_client_buffer && eglExtensions.ANDROID_image_native_buffer;
}
#if ENABLE(WEBXR)
GCGLExternalImage GraphicsContextGLTextureMapperAndroid::createExternalImage(ExternalImageSource&& source, GCGLenum, GCGLint)
{
if (m_displayObj == EGL_NO_DISPLAY) {
addError(GCGLErrorCode::InvalidOperation);
RELEASE_LOG_ERROR(XR, "Invalid display %#06x", EGL_GetError());
return { };
}
static PFNEGLGETNATIVECLIENTBUFFERANDROIDPROC s_eglGetNativeClientBufferANDROID { nullptr };
if (!s_eglGetNativeClientBufferANDROID) [[unlikely]] {
s_eglGetNativeClientBufferANDROID = reinterpret_cast<PFNEGLGETNATIVECLIENTBUFFERANDROIDPROC>(EGL_GetProcAddress("eglGetNativeClientBufferANDROID"));
RELEASE_ASSERT(s_eglGetNativeClientBufferANDROID);
}
static constexpr EGLint attributes[] = { EGL_IMAGE_PRESERVED, EGL_TRUE, EGL_NONE };
auto clientBuffer = s_eglGetNativeClientBufferANDROID(source.hardwareBuffer.get());
auto eglImage = EGL_CreateImageKHR(m_displayObj, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID, clientBuffer, attributes);
if (eglImage == EGL_NO_IMAGE_KHR) {
RELEASE_LOG_ERROR(XR, "Failed to bind AHardwareBuffer to an EGLImage (%#06x). This is typically caused by "
"a version mismatch between the gralloc implementation and the OpenGL/EGL driver. Please contact your "
"GPU vendor to resolve this problem.", EGL_GetError());
addError(GCGLErrorCode::InvalidOperation);
return { };
}
auto newName = ++m_nextExternalImageName;
m_eglImages.add(newName, eglImage);
return newName;
}
void GraphicsContextGLTextureMapperAndroid::bindExternalImage(GCGLenum target, GCGLExternalImage image)
{
if (!makeContextCurrent())
return;
EGLImage eglImage = EGL_NO_IMAGE_KHR;
if (image) {
eglImage = m_eglImages.get(image);
if (eglImage == EGL_NO_IMAGE_KHR) {
addError(GCGLErrorCode::InvalidOperation);
return;
}
}
if (target == RENDERBUFFER)
GL_EGLImageTargetRenderbufferStorageOES(RENDERBUFFER, eglImage);
else
GL_EGLImageTargetTexture2DOES(target, eglImage);
}
bool GraphicsContextGLTextureMapperAndroid::enableRequiredWebXRExtensions()
{
if (!makeContextCurrent())
return false;
return enableExtensionsImpl({
"GL_OES_EGL_image"_s,
"GL_OES_EGL_image_external"_s,
"EGL_KHR_image_base"_s,
"EGL_KHR_surfaceless_context"_s,
"EGL_ANDROID_get_native_client_buffer"_s,
"EGL_ANDROID_image_native_buffer"_s,
});
}
#endif // ENABLE(WEBXR)
} // namespace WebCore
#endif // ENABLE(WEBGL) && USE(COORDINATED_GRAPHICS) && OS(ANDROID)
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