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188 lines
7.2 KiB
C
188 lines
7.2 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2010 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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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_TEXTURE_3D_H
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#define __COGL_TEXTURE_3D_H
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-texture-3d
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* @short_description: Functions for creating and manipulating 3D textures
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*
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* These functions allow 3D textures to be used. 3D textures can be
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* thought of as layers of 2D images arranged into a cuboid
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* shape. When choosing a texel from the texture, Cogl will take into
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* account the 'r' texture coordinate to select one of the images.
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*/
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typedef struct _CoglTexture3D CoglTexture3D;
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#define COGL_TEXTURE_3D(X) ((CoglTexture3D *)X)
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/**
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* cogl_texture_3d_new_with_size:
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* @context: a #CoglContext
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* @width: width of the texture in pixels.
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* @height: height of the texture in pixels.
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* @depth: depth of the texture in pixels.
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* @internal_format: the #CoglPixelFormat to use for the GPU
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* storage of the texture.
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*
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* Creates a new #CoglTexture3D texture with the specified dimensions
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* and pixel format.
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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 going to be used and can optimize how it is
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* allocated.
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*
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* <note>This texture will fail to allocate later if
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* %COGL_FEATURE_ID_TEXTURE_3D is not advertised. Allocation can also
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* fail if the requested dimensions are not supported by the
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* GPU.</note>
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*
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* Returns: (transfer full): A new #CoglTexture3D object with no storage yet allocated.
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* Since: 1.10
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* Stability: Unstable
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*/
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CoglTexture3D *
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cogl_texture_3d_new_with_size (CoglContext *context,
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int width,
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int height,
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int depth,
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CoglPixelFormat internal_format);
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/**
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* cogl_texture_3d_new_from_data:
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* @context: a #CoglContext
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* @width: width of the texture in pixels.
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* @height: height of the texture in pixels.
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* @depth: depth of the texture in pixels.
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* @format: the #CoglPixelFormat the buffer is stored in in RAM
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* @internal_format: the #CoglPixelFormat that will be used for storing
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* the buffer on the GPU. If %COGL_PIXEL_FORMAT_ANY is given then a
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* premultiplied format similar to the format of the source data will
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* be used. The default blending equations of Cogl expect premultiplied
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* color data; the main use of passing a non-premultiplied format here
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* is if you have non-premultiplied source data and are going to adjust
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* the blend mode (see cogl_pipeline_set_blend()) or use the data for
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* something other than straight blending.
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* @rowstride: the memory offset in bytes between the starts of
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* scanlines in @data or 0 to infer it from the width and format
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* @image_stride: the number of bytes from one image to the next. This
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* can be used to add padding between the images in a similar way
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* that the rowstride can be used to add padding between
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* rows. Alternatively 0 can be passed to infer the @image_stride
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* from the @height.
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* @data: pointer the memory region where the source buffer resides
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* @error: A CoglError return location.
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*
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* Creates a new 3D texture and initializes it with @data. The data is
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* assumed to be packed array of @depth images. There can be padding
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* between the images using @image_stride.
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*
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* Note that this function will throw a #CoglError if
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* %COGL_FEATURE_ID_TEXTURE_3D is not advertised. It can also fail if the
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* requested dimensions are not supported by the GPU.
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*
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* Return value: (transfer full): the newly created #CoglTexture3D or
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* %NULL if there was an error an an exception will be
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* returned through @error.
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* Since: 1.10
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* Stability: Unstable
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*/
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CoglTexture3D *
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cogl_texture_3d_new_from_data (CoglContext *context,
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int width,
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int height,
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int depth,
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CoglPixelFormat format,
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CoglPixelFormat internal_format,
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int rowstride,
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int image_stride,
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const uint8_t *data,
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CoglError **error);
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/**
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* cogl_texture_3d_new_from_bitmap:
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* @bitmap: A #CoglBitmap object.
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* @height: height of the texture in pixels.
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* @depth: depth of the texture in pixels.
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* @internal_format: the #CoglPixelFormat that will be used for storing
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* the buffer on the GPU. If %COGL_PIXEL_FORMAT_ANY is given then a
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* premultiplied format similar to the format of the source data will
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* be used. The default blending equations of Cogl expect premultiplied
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* color data; the main use of passing a non-premultiplied format here
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* is if you have non-premultiplied source data and are going to adjust
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* the blend mode (see cogl_pipeline_set_blend()) or use the data for
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* something other than straight blending.
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* @error: A CoglError return location.
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*
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* Creates a new 3D texture and initializes it with the images in
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* @bitmap. The images are assumed to be packed together after one
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* another in the increasing y axis. The height of individual image is
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* given as @height and the number of images is given in @depth. The
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* actual height of the bitmap can be larger than @height × @depth. In
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* this case it assumes there is padding between the images.
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*
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* Return value: (transfer full): the newly created texture or %NULL
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* if there was an error.
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* Since: 2.0
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* Stability: unstable
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*/
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CoglTexture3D *
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cogl_texture_3d_new_from_bitmap (CoglBitmap *bitmap,
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unsigned int height,
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unsigned int depth,
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CoglPixelFormat internal_format,
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CoglError **error);
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/**
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* cogl_is_texture_3d:
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* @object: a #CoglObject
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*
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* Checks whether the given object references a #CoglTexture3D
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*
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* Return value: %TRUE if the passed object represents a 3D texture
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* and %FALSE otherwise
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*
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* Since: 1.4
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* Stability: Unstable
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*/
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CoglBool
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cogl_is_texture_3d (void *object);
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COGL_END_DECLS
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#endif /* __COGL_TEXTURE_3D_H */
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