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/*
* Copyright © 2018 Benjamin Otte
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#ifndef __GDK_MEMORY_TEXTURE__H__
#define __GDK_MEMORY_TEXTURE__H__
#if !defined (__GDK_H_INSIDE__) && !defined (GTK_COMPILATION)
#error "Only <gdk/gdk.h> can be included directly."
#endif
#include <gdk/gdktexture.h>
G_BEGIN_DECLS
/**
* GdkMemoryFormat:
* @GDK_MEMORY_B8G8R8A8_PREMULTIPLIED: 4 bytes; for blue, green, red, alpha.
* The color values are premultiplied with the alpha value.
* @GDK_MEMORY_A8R8G8B8_PREMULTIPLIED: 4 bytes; for alpha, red, green, blue.
* The color values are premultiplied with the alpha value.
* @GDK_MEMORY_B8G8R8A8: 4 bytes; for blue, green, red, alpha.
* @GDK_MEMORY_A8R8G8B8: 4 bytes; for alpha, red, green, blue.
* @GDK_MEMORY_R8G8B8A8: 4 bytes; for red, green, blue, alpha.
* @GDK_MEMORY_A8B8G8R8: 4 bytes; for alpha, blue, green, red.
* @GDK_MEMORY_R8G8B8: 3 bytes; for red, green, blue. The data is opaque.
* @GDK_MEMORY_B8G8R8: 3 bytes; for blue, green, red. The data is opaque.
* @GDK_MEMORY_N_FORMATS: The number of formats. This value will change as
* more formats get added, so do not rely on its concrete integer.
*
* #GdkMemoryFormat describes a format that bytes can have in memory.
*
* It describes formats by listing the contents of the memory passed to it.
* So GDK_MEMORY_A8R8G8B8 will be 1 byte (8 bits) of alpha, followed by a
* byte each of red, green and blue. It is not endian-dependent, so
* CAIRO_FORMAT_ARGB32 is represented by different #GdkMemoryFormats on
* architectures with different endiannesses.
*
* Its naming is modelled after VkFormat (see
* https://www.khronos.org/registry/vulkan/specs/1.0/html/vkspec.html#VkFormat
* for details).
*/
typedef enum {
GDK_MEMORY_B8G8R8A8_PREMULTIPLIED,
GDK_MEMORY_A8R8G8B8_PREMULTIPLIED,
GDK_MEMORY_B8G8R8A8,
GDK_MEMORY_A8R8G8B8,
GDK_MEMORY_R8G8B8A8,
GDK_MEMORY_A8B8G8R8,
GDK_MEMORY_R8G8B8,
GDK_MEMORY_B8G8R8,
GDK_MEMORY_N_FORMATS
} GdkMemoryFormat;
/**
* GDK_MEMORY_DEFAULT:
*
* This is the default memory format used by GTK and is the format
* provided by gdk_texture_download(). It is equal to
* %CAIRO_FORMAT_ARGB32.
*
* Be aware that unlike the #GdkMemoryFormat values, this format is
* different for different endianness.
*/
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
#define GDK_MEMORY_DEFAULT GDK_MEMORY_B8G8R8A8_PREMULTIPLIED
#elif G_BYTE_ORDER == G_BIG_ENDIAN
#define GDK_MEMORY_DEFAULT GDK_MEMORY_A8R8G8B8_PREMULTIPLIED
#else
#error "Unknown byte order for GDK_MEMORY_DEFAULT"
#endif
#define GDK_TYPE_MEMORY_TEXTURE (gdk_memory_texture_get_type ())
#define GDK_MEMORY_TEXTURE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GDK_TYPE_MEMORY_TEXTURE, GdkMemoryTexture))
#define GDK_IS_MEMORY_TEXTURE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GDK_TYPE_MEMORY_TEXTURE))
typedef struct _GdkMemoryTexture GdkMemoryTexture;
typedef struct _GdkMemoryTextureClass GdkMemoryTextureClass;
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GdkMemoryTexture, g_object_unref)
GDK_AVAILABLE_IN_ALL
GType gdk_memory_texture_get_type (void) G_GNUC_CONST;
GDK_AVAILABLE_IN_ALL
GdkTexture * gdk_memory_texture_new (int width,
int height,
GdkMemoryFormat format,
GBytes *bytes,
gsize stride);
G_END_DECLS
#endif /* __GDK_MEMORY_TEXTURE_H__ */
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