Wrap EGLImage with a C++ API
Change-Id: I0fa3282ea7e2ace3ba2aadd929b32232b3d41628
diff --git a/libs/hwui/Image.h b/libs/hwui/Image.h
new file mode 100644
index 0000000..3f2978f
--- /dev/null
+++ b/libs/hwui/Image.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HWUI_IMAGE_H
+#define ANDROID_HWUI_IMAGE_H
+
+#define LOG_TAG "OpenGLRenderer"
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <ui/GraphicBuffer.h>
+
+#include <utils/Log.h>
+
+namespace android {
+namespace uirenderer {
+
+/**
+ * A simple wrapper that creates an EGLImage and a texture for a GraphicBuffer.
+ */
+class Image {
+public:
+ /**
+ * Creates a new image from the specified graphic buffer. If the image
+ * cannot be created, getTexture() will return 0 and getImage() will
+ * return EGL_NO_IMAGE_KHR.
+ */
+ Image(sp<GraphicBuffer> buffer) {
+ // Create the EGLImage object that maps the GraphicBuffer
+ EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+ EGLClientBuffer clientBuffer = (EGLClientBuffer) buffer->getNativeBuffer();
+ EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE };
+
+ mImage = eglCreateImageKHR(display, EGL_NO_CONTEXT,
+ EGL_NATIVE_BUFFER_ANDROID, clientBuffer, attrs);
+
+ if (mImage == EGL_NO_IMAGE_KHR) {
+ ALOGW("Error creating image (%#x)", eglGetError());
+ mTexture = 0;
+ } else {
+ // Create a 2D texture to sample from the EGLImage
+ glGenTextures(1, &mTexture);
+ glBindTexture(GL_TEXTURE_2D, mTexture);
+ glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, mImage);
+
+ GLenum status = GL_NO_ERROR;
+ while ((status = glGetError()) != GL_NO_ERROR) {
+ ALOGW("Error creating image (%#x)", status);
+ }
+ }
+ }
+
+ ~Image() {
+ if (mImage != EGL_NO_IMAGE_KHR) {
+ eglDestroyImageKHR(eglGetDisplay(EGL_DEFAULT_DISPLAY), mImage);
+ mImage = EGL_NO_IMAGE_KHR;
+
+ glDeleteTextures(1, &mTexture);
+ mTexture = 0;
+ }
+ }
+
+ /**
+ * Returns the name of the GL texture that can be used to sample
+ * from this image.
+ */
+ GLuint getTexture() const {
+ return mTexture;
+ }
+
+ /**
+ * Returns the name of the EGL image represented by this object.
+ */
+ EGLImageKHR getImage() const {
+ return mImage;
+ }
+
+private:
+ GLuint mTexture;
+ EGLImageKHR mImage;
+}; // class Image
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_IMAGE_H