2b4a24132b
DMA buffers might be allocatable, but it doesn't mean the driver doesn't fail when we try to allocate a buffer with an implicit modifier. Using the proprietary NVIDIA driver for example, it will fail. Lets catch this up front and avoid advertising DMA buffer support when we know it won't work. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2383>
146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2020 Endless, Inc.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_DMA_BUF_HANDLE_H__
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#define __COGL_DMA_BUF_HANDLE_H__
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-framebuffer.h>
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/**
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* cogl_dma_buf_handle_new: (skip)
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*/
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COGL_EXPORT CoglDmaBufHandle *
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cogl_dma_buf_handle_new (CoglFramebuffer *framebuffer,
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int dmabuf_fd,
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int width,
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int height,
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int stride,
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int offset,
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int bpp,
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gpointer user_data,
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GDestroyNotify destroy_func);
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/**
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* cogl_dma_buf_handle_free: (skip)
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*
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* Releases @dmabuf_handle; it is a programming error to release
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* an already released handle.
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*/
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COGL_EXPORT void
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cogl_dma_buf_handle_free (CoglDmaBufHandle *dmabuf_handle);
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COGL_EXPORT gboolean
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cogl_dma_buf_handle_sync_read_start (CoglDmaBufHandle *dmabuf_handle,
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GError **error);
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COGL_EXPORT gboolean
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cogl_dma_buf_handle_sync_read_end (CoglDmaBufHandle *dmabuf_handle,
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GError **error);
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COGL_EXPORT gpointer
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cogl_dma_buf_handle_mmap (CoglDmaBufHandle *dmabuf_handle,
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GError **error);
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COGL_EXPORT gboolean
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cogl_dma_buf_handle_munmap (CoglDmaBufHandle *dmabuf_handle,
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gpointer data,
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GError **error);
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/**
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* cogl_dma_buf_handle_get_framebuffer: (skip)
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*
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* Retrieves the #CoglFramebuffer, backed by an exported DMABuf buffer,
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* of @dmabuf_handle.
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*
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* Returns: (transfer none): a #CoglFramebuffer
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*/
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COGL_EXPORT CoglFramebuffer *
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cogl_dma_buf_handle_get_framebuffer (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dma_buf_handle_get_fd: (skip)
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*
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* Retrieves the file descriptor of @dmabuf_handle.
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*
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* Returns: a valid file descriptor
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_fd (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dmabuf_handle_get_width: (skip)
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*
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* Returns: the buffer width
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_width (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dmabuf_handle_get_height: (skip)
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*
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* Returns: the buffer height
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_height (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dmabuf_handle_get_stride: (skip)
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*
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* Returns: the buffer stride
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_stride (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dmabuf_handle_get_offset: (skip)
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*
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* Returns: the buffer offset
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_offset (CoglDmaBufHandle *dmabuf_handle);
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/**
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* cogl_dmabuf_handle_get_bpp: (skip)
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*
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* Returns: the number of bytes per pixel
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*/
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COGL_EXPORT int
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cogl_dma_buf_handle_get_bpp (CoglDmaBufHandle *dmabuf_handle);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (CoglDmaBufHandle, cogl_dma_buf_handle_free)
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#endif /* __COGL_DMA_BUF_HANDLE_H__ */
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