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/*
* Cogl
*
* A Low-Level GPU Graphics and Utilities API
*
* Copyright (C) 2010 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Neil Roberts <neil@linux.intel.com>
*/
#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
#error "Only <cogl/cogl.h> can be included directly."
#endif
#ifndef __COGL_TEXTURE_3D_H
#define __COGL_TEXTURE_3D_H
COGL_BEGIN_DECLS
/**
* SECTION:cogl-texture-3d
* @short_description: Functions for creating and manipulating 3D textures
*
* These functions allow 3D textures to be used. 3D textures can be
* thought of as layers of 2D images arranged into a cuboid
* shape. When choosing a texel from the texture, Cogl will take into
* account the 'r' texture coordinate to select one of the images.
*/
typedef struct _CoglTexture3D CoglTexture3D;
#define COGL_TEXTURE_3D(X) ((CoglTexture3D *)X)
#ifdef COGL_HAS_GTYPE_SUPPORT
/**
* cogl_texture_3d_get_gtype:
*
* Returns: a #GType that can be used with the GLib type system.
*/
GType cogl_texture_3d_get_gtype (void);
#endif
/**
* cogl_texture_3d_new_with_size:
* @context: a #CoglContext
* @width: width of the texture in pixels.
* @height: height of the texture in pixels.
* @depth: depth of the texture in pixels.
*
* Creates a low-level #CoglTexture3D texture with the specified
* dimensions and pixel format.
*
* 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 preferably let Cogl
* automatically allocate storage lazily when it may know more about
* how the texture is going to be used and can optimize how it is
* allocated.
*
* The texture is still configurable until it has been allocated so
* for example you can influence the internal format of the texture
* using cogl_texture_set_components() and
* cogl_texture_set_premultiplied().
*
* <note>This texture will fail to allocate later if
* %COGL_FEATURE_ID_TEXTURE_3D is not advertised. Allocation can also
* fail if the requested dimensions are not supported by the
* GPU.</note>
*
* Returns: (transfer full): A new #CoglTexture3D object with no storage yet allocated.
* Since: 1.10
* Stability: Unstable
*/
CoglTexture3D *
cogl_texture_3d_new_with_size (CoglContext *context,
int width,
int height,
int depth);
/**
* cogl_texture_3d_new_from_data:
* @context: a #CoglContext
* @width: width of the texture in pixels.
* @height: height of the texture in pixels.
* @depth: depth of the texture in pixels.
* @format: the #CoglPixelFormat the buffer is stored in in RAM
* @rowstride: the memory offset in bytes between the starts of
* scanlines in @data or 0 to infer it from the width and format
* @image_stride: the number of bytes from one image to the next. This
* can be used to add padding between the images in a similar way
* that the rowstride can be used to add padding between
* rows. Alternatively 0 can be passed to infer the @image_stride
* from the @height.
* @data: pointer the memory region where the source buffer resides
* @error: A CoglError return location.
*
* Creates a low-level 3D texture and initializes it with @data. The
* data is assumed to be packed array of @depth images. There can be
* padding between the images using @image_stride.
*
* <note>This api will always immediately allocate GPU memory for the
* texture and upload the given data so that the @data pointer does
* not need to remain valid once this function returns. This means it
* is not possible to configure the texture before it is allocated. If
* you do need to configure the texture before allocation (to specify
* constraints on the internal format for example) then you can
* instead create a #CoglBitmap for your data and use
* cogl_texture_3d_new_from_bitmap().</note>
*
* Return value: (transfer full): the newly created #CoglTexture3D or
* %NULL if there was an error and an exception will be
* returned through @error.
* Since: 1.10
* Stability: Unstable
*/
CoglTexture3D *
cogl_texture_3d_new_from_data (CoglContext *context,
int width,
int height,
int depth,
CoglPixelFormat format,
int rowstride,
int image_stride,
const uint8_t *data,
CoglError **error);
/**
* cogl_texture_3d_new_from_bitmap:
* @bitmap: A #CoglBitmap object.
* @height: height of the texture in pixels.
* @depth: depth of the texture in pixels.
*
* Creates a low-level 3D texture and initializes it with the images
* in @bitmap. The images are assumed to be packed together after one
* another in the increasing y axis. The height of individual image is
* given as @height and the number of images is given in @depth. The
* actual height of the bitmap can be larger than @height × @depth. In
* this case it assumes there is padding between the images.
*
* 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 preferably let Cogl
* automatically allocate storage lazily when it may know more about
* how the texture is going to be used and can optimize how it is
* allocated.
*
* The texture is still configurable until it has been allocated so
* for example you can influence the internal format of the texture
* using cogl_texture_set_components() and
* cogl_texture_set_premultiplied().
*
* <note>This texture will fail to allocate later if
* %COGL_FEATURE_ID_TEXTURE_3D is not advertised. Allocation can also
* fail if the requested dimensions are not supported by the
* GPU.</note>
*
* Return value: (transfer full): a newly created #CoglTexture3D
* Since: 2.0
* Stability: unstable
*/
CoglTexture3D *
cogl_texture_3d_new_from_bitmap (CoglBitmap *bitmap,
int height,
int depth);
/**
* cogl_is_texture_3d:
* @object: a #CoglObject
*
* Checks whether the given object references a #CoglTexture3D
*
* Return value: %TRUE if the passed object represents a 3D texture
* and %FALSE otherwise
*
* Since: 1.4
* Stability: Unstable
*/
CoglBool
cogl_is_texture_3d (void *object);
COGL_END_DECLS
#endif /* __COGL_TEXTURE_3D_H */
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