forked from AuroraMiddleware/gtk
1759d27da9
Also sanitize the input bytes so the strides match alignment requirements of the data types.
138 lines
5.4 KiB
C
138 lines
5.4 KiB
C
/*
|
|
* 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_R8G8B8A8_PREMULTIPLIED: 4 bytes; for red, green, blue, alpha
|
|
* 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_R16G16B16: 3 guint16 values; for red, green, blue. Since 4.6
|
|
* @GDK_MEMORY_R16G16B16A16_PREMULTIPLIED: 4 guint16 values; for red, green,
|
|
* blue, alpha. The color values are premultiplied with the alpha value.
|
|
* Since 4.6
|
|
* @GDK_MEMORY_R16G16B16_FLOAT: 3 half-float values; for red, green, blue.
|
|
* The data is opaque. Since 4.6
|
|
* @GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED: 4 half-float values; for
|
|
* red, green, blue and alpha. The color values are premultiplied with
|
|
* the alpha value. Since 4.6
|
|
* @GDK_MEMORY_B32G32R32_FLOAT: 3 float values; for blue, green, red.
|
|
* The data is opaque. Since 4.6
|
|
* @GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED: 4 float values; for
|
|
* red, green, blue and alpha. The color values are premultiplied with
|
|
* the alpha value. Since 4.6
|
|
* @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](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_R8G8B8A8_PREMULTIPLIED,
|
|
GDK_MEMORY_B8G8R8A8,
|
|
GDK_MEMORY_A8R8G8B8,
|
|
GDK_MEMORY_R8G8B8A8,
|
|
GDK_MEMORY_A8B8G8R8,
|
|
GDK_MEMORY_R8G8B8,
|
|
GDK_MEMORY_B8G8R8,
|
|
GDK_MEMORY_R16G16B16,
|
|
GDK_MEMORY_R16G16B16A16_PREMULTIPLIED,
|
|
GDK_MEMORY_R16G16B16_FLOAT,
|
|
GDK_MEMORY_R16G16B16A16_FLOAT_PREMULTIPLIED,
|
|
GDK_MEMORY_R32G32B32_FLOAT,
|
|
GDK_MEMORY_R32G32B32A32_FLOAT_PREMULTIPLIED,
|
|
|
|
GDK_MEMORY_N_FORMATS
|
|
} GdkMemoryFormat;
|
|
|
|
/**
|
|
* GDK_MEMORY_DEFAULT:
|
|
*
|
|
* The default memory format used by GTK.
|
|
*
|
|
* This is the format provided by [method@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__ */
|