mirror of
https://github.com/brl/mutter.git
synced 2024-12-25 12:32:05 +00:00
fc5d1a8a68
This exposes the CoglAtlasTexture api, making the following public: cogl_atlas_texture_new_with_size cogl_atlas_texture_new_from_file cogl_atlas_texture_new_from_data cogl_atlas_texture_new_from_bitmap The plan is to remove auto-texture apis like cogl_texture_new_from_file since they are a bit too magic, but that means we need an explicit way for users to allocate texture that will go in the atlas. Although the _new_from_file() api is arguably redundant since you can use _bitmap_new_from_file() followed by _atlas_texture_new_from_bitmap() we don't want to loose any of the convenience that cogl_texture_new_from_file() had. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit fe515e6063ba4c3ddb5cd00d2c8527d9a6336a12) Conflicts: cogl/Makefile.am
215 lines
8.0 KiB
C
215 lines
8.0 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2013 Intel Corporation.
|
|
*
|
|
* 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 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/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef _COGL_ATLAS_TEXTURE_H_
|
|
#define _COGL_ATLAS_TEXTURE_H_
|
|
|
|
#include <cogl/cogl-context.h>
|
|
|
|
COGL_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl-atlas-texture
|
|
* @short_description: Functions for managing textures in Cogl's global
|
|
* set of texture atlases
|
|
*
|
|
* A texture atlas is a texture that contains many smaller images that
|
|
* an application is interested in. These are packed together as a way
|
|
* of optimizing drawing with those images by avoiding the costs of
|
|
* repeatedly telling the hardware to change what texture it should
|
|
* sample from. This can enable more geometry to be batched together
|
|
* into few draw calls.
|
|
*
|
|
* Each #CoglContext has an shared, pool of texture atlases that are
|
|
* are managed by Cogl.
|
|
*
|
|
* This api lets applications upload texture data into one of Cogl's
|
|
* shared texture atlases using a high-level #CoglAtlasTexture which
|
|
* represents a sub-region of one of these atlases.
|
|
*
|
|
* <note>A #CoglAtlasTexture is a high-level meta texture which has
|
|
* some limitations to be aware of. Please see the documentation for
|
|
* #CoglMetaTexture for more details.</note>
|
|
*/
|
|
|
|
|
|
typedef struct _CoglAtlasTexture CoglAtlasTexture;
|
|
#define COGL_ATLAS_TEXTURE(tex) ((CoglAtlasTexture *) tex)
|
|
|
|
|
|
/**
|
|
* cogl_atlas_texture_new_with_size:
|
|
* @ctx: A #CoglContext
|
|
* @width: The width of your atlased texture.
|
|
* @height: The height of your atlased texture.
|
|
* @internal_format: The format of the texture
|
|
*
|
|
* Creates a #CoglAtlasTexture with a given @width and @height. A
|
|
* #CoglAtlasTexture represents a sub-region within one of Cogl's
|
|
* shared texture atlases.
|
|
*
|
|
* The storage for the texture is not allocated before this function
|
|
* returns. You can call cogl_texture_allocate() to explicitly
|
|
* allocate the underlying storage or let Cogl automatically allocate
|
|
* storage lazily.
|
|
*
|
|
* <note>This call can fail if Cogl considers the given
|
|
* @internal_format incompatible with the format of its internal
|
|
* atlases.</note>
|
|
*
|
|
* <note>The returned #CoglAtlasTexture is a high-level meta-texture
|
|
* with some limitations. See the documentation for #CoglMetaTexture
|
|
* for more details.</note>
|
|
*
|
|
* Returns: A new #CoglAtlasTexture object with no storage allocated
|
|
* yet or %NULL on failure and @error will be updated.
|
|
* Since: 1.16
|
|
* Stability: unstable
|
|
*/
|
|
CoglAtlasTexture *
|
|
cogl_atlas_texture_new_with_size (CoglContext *ctx,
|
|
int width,
|
|
int height,
|
|
CoglPixelFormat internal_format,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_atlas_texture_new_from_file:
|
|
* @ctx: A #CoglContext
|
|
* @filename: the file to load
|
|
* @internal_format: The format of the texture
|
|
*
|
|
* Creates a #CoglAtlasTexture from an image file. A #CoglAtlasTexture
|
|
* represents a sub-region within one of Cogl's shared texture
|
|
* atlases.
|
|
*
|
|
* <note>This call can fail if Cogl considers the given
|
|
* @internal_format incompatible with the format of its internal
|
|
* atlases.</note>
|
|
*
|
|
* <note>The returned #CoglAtlasTexture is a high-level meta-texture
|
|
* with some limitations. See the documentation for #CoglMetaTexture
|
|
* for more details.</note>
|
|
*
|
|
* Returns: A new #CoglAtlasTexture object or %NULL on failure and
|
|
* @error will be updated.
|
|
* Since: 1.16
|
|
* Stability: unstable
|
|
*/
|
|
CoglAtlasTexture *
|
|
cogl_atlas_texture_new_from_file (CoglContext *ctx,
|
|
const char *filename,
|
|
CoglPixelFormat internal_format,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_atlas_texture_new_from_data:
|
|
* @ctx: A #CoglContext
|
|
* @width: width of texture in pixels
|
|
* @height: height of texture in pixels
|
|
* @format: the #CoglPixelFormat the buffer is stored in in RAM
|
|
* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
|
|
* texture. If %COGL_PIXEL_FORMAT_ANY is given then a premultiplied
|
|
* format similar to the format of the source data will be used. The
|
|
* default blending equations of Cogl expect premultiplied color data;
|
|
* the main use of passing a non-premultiplied format here is if you
|
|
* have non-premultiplied source data and are going to adjust the blend
|
|
* mode (see cogl_material_set_blend()) or use the data for something
|
|
* other than straight blending.
|
|
* @rowstride: the memory offset in bytes between the start of each
|
|
* row in @data. A value of 0 will make Cogl automatically
|
|
* calculate @rowstride from @width and @format.
|
|
* @data: pointer to the memory region where the source buffer resides
|
|
* @error: A #CoglError to catch exceptional errors or %NULL
|
|
*
|
|
* Creates a new #CoglAtlasTexture texture based on data residing in
|
|
* memory. A #CoglAtlasTexture represents a sub-region within one of
|
|
* Cogl's shared texture atlases.
|
|
*
|
|
* <note>This call can fail if Cogl considers the given
|
|
* @internal_format incompatible with the format of its internal
|
|
* atlases.</note>
|
|
*
|
|
* <note>The returned #CoglAtlasTexture is a high-level
|
|
* meta-texture with some limitations. See the documentation for
|
|
* #CoglMetaTexture for more details.</note>
|
|
*
|
|
* Returns: A new #CoglAtlasTexture object or %NULL on failure and
|
|
* @error will be updated.
|
|
* Since: 1.16
|
|
* Stability: unstable
|
|
*/
|
|
CoglAtlasTexture *
|
|
cogl_atlas_texture_new_from_data (CoglContext *ctx,
|
|
int width,
|
|
int height,
|
|
CoglPixelFormat format,
|
|
CoglPixelFormat internal_format,
|
|
int rowstride,
|
|
const uint8_t *data,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_atlas_texture_new_from_bitmap:
|
|
* @bitmap: A #CoglBitmap
|
|
* @internal_format: the #CoglPixelFormat to use for the GPU storage of the
|
|
* texture. If %COGL_PIXEL_FORMAT_ANY is given then a premultiplied
|
|
* format similar to the format of the source data will be used. The
|
|
* default blending equations of Cogl expect premultiplied color data;
|
|
* the main use of passing a non-premultiplied format here is if you
|
|
* have non-premultiplied source data and are going to adjust the blend
|
|
* mode (see cogl_material_set_blend()) or use the data for something
|
|
* other than straight blending.
|
|
* @error: A #CoglError to catch exceptional errors or %NULL
|
|
*
|
|
* Creates a new #CoglAtlasTexture texture based on data residing in a
|
|
* @bitmap. A #CoglAtlasTexture represents a sub-region within one of
|
|
* Cogl's shared texture atlases.
|
|
*
|
|
* <note>This call can fail if Cogl considers the given
|
|
* @internal_format incompatible with the format of its internal
|
|
* atlases.</note>
|
|
*
|
|
* <note>The returned #CoglAtlasTexture is a high-level meta-texture
|
|
* with some limitations. See the documentation for #CoglMetaTexture
|
|
* for more details.</note>
|
|
*
|
|
* Returns: A new #CoglAtlasTexture object or %NULL on failure and
|
|
* @error will be updated.
|
|
* Since: 1.16
|
|
* Stability: unstable
|
|
*/
|
|
CoglAtlasTexture *
|
|
cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp,
|
|
CoglPixelFormat internal_format,
|
|
CoglError **error);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* _COGL_ATLAS_TEXTURE_H_ */
|