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caa798c672
The intention was to add a license header the same as other files in the mutter backend files, so make it so. Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1690>
86 lines
3.4 KiB
C
86 lines
3.4 KiB
C
/* meta-cogl-utils.c
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*
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* Copyright 2020 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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*/
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#include "backends/native/meta-cogl-utils.h"
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#include <drm_fourcc.h>
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typedef struct _PixelFormatMap {
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uint32_t drm_format;
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CoglPixelFormat cogl_format;
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CoglTextureComponents cogl_components;
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} PixelFormatMap;
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static const PixelFormatMap pixel_format_map[] = {
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/* DRM formats are defined as little-endian, not machine endian. */
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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{ DRM_FORMAT_RGB565, COGL_PIXEL_FORMAT_RGB_565, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ABGR8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XBGR8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ARGB8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XRGB8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_BGRA8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_BGRX8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_RGBA8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_RGBX8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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/* DRM_FORMAT_RGB565 cannot be expressed. */
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{ DRM_FORMAT_ABGR8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XBGR8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ARGB8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XRGB8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_BGRA8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_BGRX8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_RGBA8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_RGBX8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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#else
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#error "unexpected G_BYTE_ORDER"
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#endif
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};
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gboolean
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meta_cogl_pixel_format_from_drm_format (uint32_t drm_format,
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CoglPixelFormat *out_format,
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CoglTextureComponents *out_components)
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{
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const size_t n = G_N_ELEMENTS (pixel_format_map);
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size_t i;
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for (i = 0; i < n; i++)
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{
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if (pixel_format_map[i].drm_format == drm_format)
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break;
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}
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if (i == n)
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return FALSE;
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if (out_format)
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*out_format = pixel_format_map[i].cogl_format;
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if (out_components)
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*out_components = pixel_format_map[i].cogl_components;
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return TRUE;
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}
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