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gl_pixel_buffer.h
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1 /*
2  * Copyright © 2013 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU General Public License version 3,
6  * as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored By: Alexandros Frantzis <alexandros.frantzis@canonical.com>
17  */
18 
19 #ifndef MIR_SHELL_GL_PIXEL_BUFFER_H_
20 #define MIR_SHELL_GL_PIXEL_BUFFER_H_
21 
22 #include "mir/shell/pixel_buffer.h"
23 
24 #include <memory>
25 #include <vector>
26 
27 #include <GLES2/gl2.h>
28 
29 namespace mir
30 {
31 namespace graphics
32 {
33 class Buffer;
34 class GLContext;
35 }
36 
37 namespace shell
38 {
40 class GLPixelBuffer : public PixelBuffer
41 {
42 public:
43  GLPixelBuffer(std::unique_ptr<graphics::GLContext> gl_context);
44  ~GLPixelBuffer() noexcept;
45 
46  void fill_from(graphics::Buffer& buffer);
47  void const* as_argb_8888();
48  geometry::Size size() const;
49  geometry::Stride stride() const;
50 
51 private:
52  void prepare();
53  void copy_and_convert_pixel_line(char* src, char* dst);
54 
55  std::unique_ptr<graphics::GLContext> const gl_context;
56  GLuint tex;
57  GLuint fbo;
58  std::vector<char> pixels;
59  GLuint gl_pixel_format;
60  bool pixels_need_y_flip;
61  geometry::Size size_;
62  geometry::Stride stride_;
63 };
64 
65 }
66 }
67 
68 #endif /* MIR_SHELL_GL_PIXEL_BUFFER_H_ */

Copyright © 2012,2013 Canonical Ltd.
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