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70bacb9402
CoglError was added at a certain point to remove the hard dependency on GLib, but since this can't be avoided inside mutter, let's remove this whole abstraction. https://gitlab.gnome.org/GNOME/mutter/merge_requests/631
255 lines
9.1 KiB
C
255 lines
9.1 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) 2013 Intel Corporation.
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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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*
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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_ATLAS_TEXTURE_H_
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#define _COGL_ATLAS_TEXTURE_H_
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#include <cogl/cogl-context.h>
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#include <glib-object.h>
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-atlas-texture
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* @short_description: Functions for managing textures in Cogl's global
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* set of texture atlases
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*
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* A texture atlas is a texture that contains many smaller images that
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* an application is interested in. These are packed together as a way
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* of optimizing drawing with those images by avoiding the costs of
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* repeatedly telling the hardware to change what texture it should
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* sample from. This can enable more geometry to be batched together
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* into few draw calls.
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*
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* Each #CoglContext has an shared, pool of texture atlases that are
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* are managed by Cogl.
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*
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* This api lets applications upload texture data into one of Cogl's
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* shared texture atlases using a high-level #CoglAtlasTexture which
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* represents a sub-region of one of these atlases.
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*
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* <note>A #CoglAtlasTexture is a high-level meta texture which has
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* some limitations to be aware of. Please see the documentation for
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* #CoglMetaTexture for more details.</note>
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*/
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typedef struct _CoglAtlasTexture CoglAtlasTexture;
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#define COGL_ATLAS_TEXTURE(tex) ((CoglAtlasTexture *) tex)
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/**
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* cogl_atlas_texture_get_gtype:
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*
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* Returns: a #GType that can be used with the GLib type system.
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*/
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GType cogl_atlas_texture_get_gtype (void);
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/**
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* cogl_atlas_texture_new_with_size:
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* @ctx: A #CoglContext
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* @width: The width of your atlased texture.
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* @height: The height of your atlased texture.
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*
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* Creates a #CoglAtlasTexture with a given @width and @height. A
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* #CoglAtlasTexture represents a sub-region within one of Cogl's
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* shared texture atlases.
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*
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* The storage for the texture is not allocated before this function
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* returns. You can call cogl_texture_allocate() to explicitly
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* allocate the underlying storage or let Cogl automatically allocate
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* storage lazily.
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*
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* The texture is still configurable until it has been allocated so
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* for example you can influence the internal format of the texture
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* using cogl_texture_set_components() and
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* cogl_texture_set_premultiplied().
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*
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* <note>Allocate call can fail if Cogl considers the internal
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* format to be incompatible with the format of its internal
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* atlases.</note>
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*
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* <note>The returned #CoglAtlasTexture is a high-level meta-texture
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* with some limitations. See the documentation for #CoglMetaTexture
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* for more details.</note>
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*
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* Returns: (transfer full): A new #CoglAtlasTexture object.
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* Since: 1.16
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* Stability: unstable
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*/
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CoglAtlasTexture *
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cogl_atlas_texture_new_with_size (CoglContext *ctx,
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int width,
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int height);
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/**
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* cogl_atlas_texture_new_from_file:
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* @ctx: A #CoglContext
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* @filename: the file to load
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* @error: A #GError to catch exceptional errors or %NULL
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*
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* Creates a #CoglAtlasTexture from an image file. A #CoglAtlasTexture
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* represents a sub-region within one of Cogl's shared texture
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* atlases.
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*
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* The storage for the texture is not allocated before this function
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* returns. You can call cogl_texture_allocate() to explicitly
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* allocate the underlying storage or let Cogl automatically allocate
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* storage lazily.
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*
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* The texture is still configurable until it has been allocated so
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* for example you can influence the internal format of the texture
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* using cogl_texture_set_components() and
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* cogl_texture_set_premultiplied().
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*
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* <note>Allocate call can fail if Cogl considers the internal
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* format to be incompatible with the format of its internal
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* atlases.</note>
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*
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* <note>The returned #CoglAtlasTexture is a high-level meta-texture
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* with some limitations. See the documentation for #CoglMetaTexture
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* for more details.</note>
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*
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* Return value: (transfer full): A new #CoglAtlasTexture object or
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* %NULL on failure and @error will be updated.
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* Since: 1.16
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* Stability: unstable
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*/
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CoglAtlasTexture *
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cogl_atlas_texture_new_from_file (CoglContext *ctx,
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const char *filename,
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GError **error);
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/**
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* cogl_atlas_texture_new_from_data:
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* @ctx: A #CoglContext
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* @width: width of texture in pixels
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* @height: height of texture in pixels
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* @format: the #CoglPixelFormat the buffer is stored in in RAM
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* @rowstride: the memory offset in bytes between the start of each
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* row in @data. A value of 0 will make Cogl automatically
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* calculate @rowstride from @width and @format.
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* @data: pointer to the memory region where the source buffer resides
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* @error: A #GError to catch exceptional errors or %NULL
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*
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* Creates a new #CoglAtlasTexture texture based on data residing in
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* memory. A #CoglAtlasTexture represents a sub-region within one of
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* Cogl's shared texture atlases.
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*
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* <note>This api will always immediately allocate GPU memory for the
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* texture and upload the given data so that the @data pointer does
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* not need to remain valid once this function returns. This means it
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* is not possible to configure the texture before it is allocated. If
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* you do need to configure the texture before allocation (to specify
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* constraints on the internal format for example) then you can
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* instead create a #CoglBitmap for your data and use
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* cogl_atlas_texture_new_from_bitmap() or use
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* cogl_atlas_texture_new_with_size() and then upload data using
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* cogl_texture_set_data()</note>
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*
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* <note>Allocate call can fail if Cogl considers the internal
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* format to be incompatible with the format of its internal
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* atlases.</note>
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*
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* <note>The returned #CoglAtlasTexture is a high-level
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* meta-texture with some limitations. See the documentation for
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* #CoglMetaTexture for more details.</note>
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*
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* Return value: (transfer full): A new #CoglAtlasTexture object or
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* %NULL on failure and @error will be updated.
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* Since: 1.16
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* Stability: unstable
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*/
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CoglAtlasTexture *
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cogl_atlas_texture_new_from_data (CoglContext *ctx,
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int width,
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int height,
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CoglPixelFormat format,
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int rowstride,
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const uint8_t *data,
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GError **error);
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/**
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* cogl_atlas_texture_new_from_bitmap:
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* @bitmap: A #CoglBitmap
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*
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* Creates a new #CoglAtlasTexture texture based on data residing in a
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* @bitmap. A #CoglAtlasTexture represents a sub-region within one of
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* Cogl's shared texture atlases.
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*
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* The storage for the texture is not allocated before this function
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* returns. You can call cogl_texture_allocate() to explicitly
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* allocate the underlying storage or preferably let Cogl
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* automatically allocate storage lazily when it may know more about
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* how the texture is being used and can optimize how it is allocated.
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*
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* The texture is still configurable until it has been allocated so
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* for example you can influence the internal format of the texture
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* using cogl_texture_set_components() and
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* cogl_texture_set_premultiplied().
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*
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* <note>Allocate call can fail if Cogl considers the internal
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* format to be incompatible with the format of its internal
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* atlases.</note>
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*
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* <note>The returned #CoglAtlasTexture is a high-level meta-texture
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* with some limitations. See the documentation for #CoglMetaTexture
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* for more details.</note>
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*
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* Returns: (transfer full): A new #CoglAtlasTexture object.
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* Since: 1.16
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* Stability: unstable
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*/
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CoglAtlasTexture *
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cogl_atlas_texture_new_from_bitmap (CoglBitmap *bmp);
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/**
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* cogl_is_atlas_texture:
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* @object: a #CoglObject
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*
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* Checks whether the given object references a #CoglAtlasTexture
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*
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* Return value: %TRUE if the passed object represents an atlas
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* texture and %FALSE otherwise
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*
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* Since: 1.16
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* Stability: Unstable
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*/
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gboolean
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cogl_is_atlas_texture (void *object);
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G_END_DECLS
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#endif /* _COGL_ATLAS_TEXTURE_H_ */
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