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display_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 Lesser 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 Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser 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_GRAPHICS_MESA_DISPLAY_BUFFER_H_
20 #define MIR_GRAPHICS_MESA_DISPLAY_BUFFER_H_
21 
23 #include "display_helpers.h"
24 
25 #include <vector>
26 #include <memory>
27 #include <atomic>
28 
29 namespace mir
30 {
31 namespace graphics
32 {
33 
34 class DisplayReport;
35 class GLConfig;
36 
37 namespace mesa
38 {
39 
40 class Platform;
41 class BufferObject;
42 class KMSOutput;
43 
45 {
46 public:
47  DisplayBuffer(std::shared_ptr<Platform> const& platform,
48  std::shared_ptr<DisplayReport> const& listener,
49  std::vector<std::shared_ptr<KMSOutput>> const& outputs,
50  GBMSurfaceUPtr surface_gbm,
51  geometry::Rectangle const& area,
52  MirOrientation rot,
53  GLConfig const& gl_config,
54  EGLContext shared_context);
56 
58  void make_current();
59  void release_current();
60  void post_update();
61  bool post_renderables_if_optimizable(RenderableList const& renderlist);
62 
63  MirOrientation orientation() const override;
64  bool uses_alpha() const override;
65  void schedule_set_crtc();
66  void wait_for_page_flip();
67 
68 private:
69  void post_update(std::shared_ptr<graphics::Buffer> bypass_buf);
70 
71  BufferObject* get_front_buffer_object();
72  BufferObject* get_buffer_object(struct gbm_bo *bo);
73  bool schedule_page_flip(BufferObject* bufobj);
74 
75  BufferObject* last_flipped_bufobj;
76  BufferObject* scheduled_bufobj;
77  std::shared_ptr<graphics::Buffer> last_flipped_bypass_buf;
78  std::shared_ptr<Platform> const platform;
79  std::shared_ptr<DisplayReport> const listener;
80  /* DRM helper from mgm::Platform */
81  helpers::DRMHelper& drm;
82  std::vector<std::shared_ptr<KMSOutput>> outputs;
83  GBMSurfaceUPtr surface_gbm;
86  uint32_t fb_width, fb_height;
87  MirOrientation rotation;
88  std::atomic<bool> needs_set_crtc;
89  bool page_flips_pending;
90 };
91 
92 }
93 }
94 }
95 
96 #endif /* MIR_GRAPHICS_MESA_DISPLAY_BUFFER_H_ */
All things Mir.
Definition: aging_buffer.h:24
geometry::Rectangle view_area() const
The area the DisplayBuffer occupies in the virtual screen space.
Definition: display_buffer.cpp:176
Interface to an output framebuffer.
Definition: display_buffer.h:38
std::unique_ptr< gbm_surface, std::function< void(gbm_surface *)> > GBMSurfaceUPtr
Definition: display_helpers.h:45
Definition: display_helpers.h:50
void post_update()
This will trigger OpenGL rendering and post the result to the screen.
Definition: display_buffer.cpp:213
bool uses_alpha() const override
Returns true if the display buffer has an alpha channel and the alpha channel will be read from at so...
Definition: display_buffer.cpp:187
void release_current()
Releases the current GL rendering target.
Definition: display_buffer.cpp:396
MirOrientation
Direction relative to the "natural" orientation of the display.
Definition: common.h:134
Interface for customizing aspects of the GL config used by the server.
Definition: gl_config.h:30
std::list< std::shared_ptr< Renderable > > RenderableList
Definition: renderable.h:88
Definition: display_helpers.h:94
MirOrientation orientation() const override
Returns the orientation of the display buffer relative to how the user should see it (the orientation...
Definition: display_buffer.cpp:181
~DisplayBuffer()
Definition: display_buffer.cpp:163
bool post_renderables_if_optimizable(RenderableList const &renderlist)
This will render renderlist to the screen and post the result to the screen if there is a hardware op...
Definition: display_buffer.cpp:192
void make_current()
Makes the DisplayBuffer the current GL rendering target.
Definition: display_buffer.cpp:388
Definition: rectangle.h:33
Definition: display_buffer.h:44
void schedule_set_crtc()
Definition: display_buffer.cpp:401
void wait_for_page_flip()
Definition: display_buffer.cpp:377

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