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// Copyright 2014 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/gl/gl_image_android_native_buffer.h"
#include "ui/gl/gl_surface_egl.h"
#include "ui/gl/scoped_binders.h"
namespace gfx {
GLImageAndroidNativeBuffer::GLImageAndroidNativeBuffer(gfx::Size size)
: GLImageEGL(size),
release_after_use_(false),
in_use_(false),
target_(0),
egl_image_for_unbind_(EGL_NO_IMAGE_KHR),
texture_id_for_unbind_(0) {}
GLImageAndroidNativeBuffer::~GLImageAndroidNativeBuffer() { Destroy(); }
bool GLImageAndroidNativeBuffer::Initialize(gfx::GpuMemoryBufferHandle buffer) {
DCHECK(buffer.native_buffer);
EGLint attrs[] = {EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE};
return GLImageEGL::Initialize(
EGL_NATIVE_BUFFER_ANDROID, buffer.native_buffer, attrs);
}
void GLImageAndroidNativeBuffer::Destroy() {
if (egl_image_for_unbind_ != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(GLSurfaceEGL::GetHardwareDisplay(),
egl_image_for_unbind_);
egl_image_for_unbind_ = EGL_NO_IMAGE_KHR;
}
if (texture_id_for_unbind_) {
glDeleteTextures(1, &texture_id_for_unbind_);
texture_id_for_unbind_ = 0;
}
GLImageEGL::Destroy();
}
bool GLImageAndroidNativeBuffer::BindTexImage(unsigned target) {
DCHECK_NE(EGL_NO_IMAGE_KHR, egl_image_);
if (target == GL_TEXTURE_RECTANGLE_ARB) {
LOG(ERROR) << "EGLImage cannot be bound to TEXTURE_RECTANGLE_ARB target";
return false;
}
if (target_ && target_ != target) {
LOG(ERROR) << "EGLImage can only be bound to one target";
return false;
}
target_ = target;
// Defer ImageTargetTexture2D if not currently in use.
if (!in_use_)
return true;
glEGLImageTargetTexture2DOES(target_, egl_image_);
DCHECK_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
return true;
}
void GLImageAndroidNativeBuffer::WillUseTexImage() {
DCHECK(egl_image_);
DCHECK(!in_use_);
in_use_ = true;
glEGLImageTargetTexture2DOES(target_, egl_image_);
DCHECK_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
}
void GLImageAndroidNativeBuffer::DidUseTexImage() {
DCHECK(in_use_);
in_use_ = false;
if (!release_after_use_)
return;
if (egl_image_for_unbind_ == EGL_NO_IMAGE_KHR) {
DCHECK_EQ(0u, texture_id_for_unbind_);
glGenTextures(1, &texture_id_for_unbind_);
{
ScopedTextureBinder texture_binder(GL_TEXTURE_2D, texture_id_for_unbind_);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
char zero[4] = {0, };
glTexImage2D(
GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &zero);
}
EGLint attrs[] = {EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE};
// Need to pass current EGL rendering context to eglCreateImageKHR for
// target type EGL_GL_TEXTURE_2D_KHR.
egl_image_for_unbind_ = eglCreateImageKHR(
GLSurfaceEGL::GetHardwareDisplay(),
eglGetCurrentContext(),
EGL_GL_TEXTURE_2D_KHR,
reinterpret_cast<EGLClientBuffer>(texture_id_for_unbind_),
attrs);
DCHECK_NE(EGL_NO_IMAGE_KHR, egl_image_for_unbind_)
<< "Error creating EGLImage: " << eglGetError();
}
glEGLImageTargetTexture2DOES(target_, egl_image_for_unbind_);
DCHECK_EQ(static_cast<GLenum>(GL_NO_ERROR), glGetError());
}
void GLImageAndroidNativeBuffer::SetReleaseAfterUse() {
release_after_use_ = true;
}
} // namespace gfx
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