1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_FILTERFW_CORE_GL_BUFFER_INTERFACE_H
18#define ANDROID_FILTERFW_CORE_GL_BUFFER_INTERFACE_H
19
20#include <GLES2/gl2.h>
21
22namespace android {
23namespace filterfw {
24
25class GLTextureHandle {
26  public:
27    virtual ~GLTextureHandle() { }
28
29    // Returns the held texture id.
30    virtual GLuint GetTextureId() const = 0;
31
32    // Binds the held texture. This may result in creating the texture if it
33    // is not yet available.
34    virtual bool FocusTexture() = 0;
35
36    // Generates the mipmap chain of the held texture. Returns true, iff
37    // generating was successful.
38    virtual bool GenerateMipMap() = 0;
39
40    // Set a texture parameter (see glTextureParameter documentation). Returns
41    // true iff the parameter was set successfully.
42    virtual bool SetTextureParameter(GLenum pname, GLint value) = 0;
43
44    // Returns the texture target used.
45    // Texture Target should be: GL_TEXTURE_2D, GL_TEXTURE_EXTERNAL_OES.
46    virtual GLuint GetTextureTarget() const = 0;
47};
48
49class GLFrameBufferHandle {
50  public:
51    virtual ~GLFrameBufferHandle() { }
52
53    // Returns the held FBO id.
54    virtual GLuint GetFboId() const = 0;
55
56    // Binds the held FBO. This may result in creating the FBO if it
57    // is not yet available.
58    virtual bool FocusFrameBuffer() = 0;
59};
60
61// Interface to instances that hold GL textures and frame-buffer-objects.
62// The GLFrame class implements this interface.
63class GLBufferHandle : public GLTextureHandle, public GLFrameBufferHandle {
64  public:
65    virtual ~GLBufferHandle() { }
66};
67
68} // namespace filterfw
69} // namespace android
70
71#endif  // ANDROID_FILTERFW_CORE_GL_BUFFER_INTERFACE_H
72