gfx/gl/GLSharedHandleHelpers.h@97036ab72558 (annotated)
gfx/gl/GLSharedHandleHelpers.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #ifndef GLSHAREDHANDLEHELPERS_H_ |
| michael@0 | 6 | #define GLSHAREDHANDLEHELPERS_H_ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "GLContextTypes.h" |
| michael@0 | 9 | #include "mozilla/gfx/Types.h" |
| michael@0 | 10 | |
| michael@0 | 11 | namespace mozilla { |
| michael@0 | 12 | namespace gl { |
| michael@0 | 13 | |
| michael@0 | 14 | /** |
| michael@0 | 15 | * Create a new shared GLContext content handle, using the passed buffer as a source. |
| michael@0 | 16 | * Must be released by ReleaseSharedHandle. |
| michael@0 | 17 | */ |
| michael@0 | 18 | SharedTextureHandle CreateSharedHandle(GLContext* gl, |
| michael@0 | 19 | SharedTextureShareType shareType, |
| michael@0 | 20 | void* buffer, |
| michael@0 | 21 | SharedTextureBufferType bufferType); |
| michael@0 | 22 | |
| michael@0 | 23 | /** |
| michael@0 | 24 | * - It is better to call ReleaseSharedHandle before original GLContext destroyed, |
| michael@0 | 25 | * otherwise warning will be thrown on attempt to destroy Texture associated with SharedHandle, depends on backend implementation. |
| michael@0 | 26 | * - It does not require to be called on context where it was created, |
| michael@0 | 27 | * because SharedHandle suppose to keep Context reference internally, |
| michael@0 | 28 | * or don't require specific context at all, for example IPC SharedHandle. |
| michael@0 | 29 | * - Not recommended to call this between AttachSharedHandle and Draw Target call. |
| michael@0 | 30 | * if it is really required for some special backend, then DetachSharedHandle API must be added with related implementation. |
| michael@0 | 31 | * - It is recommended to stop any possible access to SharedHandle (Attachments, pending GL calls) before calling Release, |
| michael@0 | 32 | * otherwise some artifacts might appear or even crash if API backend implementation does not expect that. |
| michael@0 | 33 | * SharedHandle (currently EGLImage) does not require GLContext because it is EGL call, and can be destroyed |
| michael@0 | 34 | * at any time, unless EGLImage have siblings (which are not expected with current API). |
| michael@0 | 35 | */ |
| michael@0 | 36 | void ReleaseSharedHandle(GLContext* gl, |
| michael@0 | 37 | SharedTextureShareType shareType, |
| michael@0 | 38 | SharedTextureHandle sharedHandle); |
| michael@0 | 39 | |
| michael@0 | 40 | |
| michael@0 | 41 | typedef struct { |
| michael@0 | 42 | GLenum mTarget; |
| michael@0 | 43 | gfx::SurfaceFormat mTextureFormat; |
| michael@0 | 44 | gfx::Matrix4x4 mTextureTransform; |
| michael@0 | 45 | } SharedHandleDetails; |
| michael@0 | 46 | |
| michael@0 | 47 | /** |
| michael@0 | 48 | * Returns information necessary for rendering a shared handle. |
| michael@0 | 49 | * These values change depending on what sharing mechanism is in use |
| michael@0 | 50 | */ |
| michael@0 | 51 | bool GetSharedHandleDetails(GLContext* gl, |
| michael@0 | 52 | SharedTextureShareType shareType, |
| michael@0 | 53 | SharedTextureHandle sharedHandle, |
| michael@0 | 54 | SharedHandleDetails& details); |
| michael@0 | 55 | /** |
| michael@0 | 56 | * Attach Shared GL Handle to GL_TEXTURE_2D target |
| michael@0 | 57 | * GLContext must be current before this call |
| michael@0 | 58 | */ |
| michael@0 | 59 | bool AttachSharedHandle(GLContext* gl, |
| michael@0 | 60 | SharedTextureShareType shareType, |
| michael@0 | 61 | SharedTextureHandle sharedHandle); |
| michael@0 | 62 | |
| michael@0 | 63 | /** |
| michael@0 | 64 | * Detach Shared GL Handle from GL_TEXTURE_2D target |
| michael@0 | 65 | */ |
| michael@0 | 66 | void DetachSharedHandle(GLContext* gl, |
| michael@0 | 67 | SharedTextureShareType shareType, |
| michael@0 | 68 | SharedTextureHandle sharedHandle); |
| michael@0 | 69 | |
| michael@0 | 70 | } |
| michael@0 | 71 | } |
| michael@0 | 72 | |
| michael@0 | 73 | #endif |
