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74 lines
3.0 KiB
C++
74 lines
3.0 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GLSHAREDHANDLEHELPERS_H_
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#define GLSHAREDHANDLEHELPERS_H_
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#include "GLContextTypes.h"
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#include "mozilla/gfx/Types.h"
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namespace mozilla {
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namespace gl {
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/**
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* Create a new shared GLContext content handle, using the passed buffer as a source.
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* Must be released by ReleaseSharedHandle.
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*/
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SharedTextureHandle CreateSharedHandle(GLContext* gl,
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SharedTextureShareType shareType,
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void* buffer,
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SharedTextureBufferType bufferType);
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/**
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* - It is better to call ReleaseSharedHandle before original GLContext destroyed,
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* otherwise warning will be thrown on attempt to destroy Texture associated with SharedHandle, depends on backend implementation.
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* - It does not require to be called on context where it was created,
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* because SharedHandle suppose to keep Context reference internally,
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* or don't require specific context at all, for example IPC SharedHandle.
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* - Not recommended to call this between AttachSharedHandle and Draw Target call.
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* if it is really required for some special backend, then DetachSharedHandle API must be added with related implementation.
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* - It is recommended to stop any possible access to SharedHandle (Attachments, pending GL calls) before calling Release,
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* otherwise some artifacts might appear or even crash if API backend implementation does not expect that.
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* SharedHandle (currently EGLImage) does not require GLContext because it is EGL call, and can be destroyed
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* at any time, unless EGLImage have siblings (which are not expected with current API).
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*/
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void ReleaseSharedHandle(GLContext* gl,
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SharedTextureShareType shareType,
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SharedTextureHandle sharedHandle);
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typedef struct {
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GLenum mTarget;
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gfx::SurfaceFormat mTextureFormat;
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gfx3DMatrix mTextureTransform;
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} SharedHandleDetails;
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/**
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* Returns information necessary for rendering a shared handle.
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* These values change depending on what sharing mechanism is in use
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*/
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bool GetSharedHandleDetails(GLContext* gl,
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SharedTextureShareType shareType,
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SharedTextureHandle sharedHandle,
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SharedHandleDetails& details);
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/**
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* Attach Shared GL Handle to GL_TEXTURE_2D target
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* GLContext must be current before this call
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*/
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bool AttachSharedHandle(GLContext* gl,
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SharedTextureShareType shareType,
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SharedTextureHandle sharedHandle);
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/**
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* Detach Shared GL Handle from GL_TEXTURE_2D target
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*/
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void DetachSharedHandle(GLContext* gl,
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SharedTextureShareType shareType,
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SharedTextureHandle sharedHandle);
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}
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}
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#endif
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