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This interface represents any textures that are backed by a single texture in GL and that can be used directly with the cogl_framebuffer_draw_attributes family of functions. This currently equates to CoglTexture2D, CoglTexture3D and CoglTextureRectangle. The interface currently has only one method called cogl_primitive_set_auto_mipmap. This replaces the COGL_TEXTURE_NO_AUTO_MIPMAP flag from the CoglTextureFlags parameter in the constructors. None of the other flags in CoglTextureFlags make sense for primitive textures so it doesn't seem like a good idea to need them for primitive constructors. There is a boolean in the vtable to mark whether a texture type is primitive which the new cogl_is_primitive function uses. There is also a new texture virtual called set_auto_mipmap which is only required to be implemented for primitive textures. Reviewed-by: Robert Bragg <robert@linux.intel.com>
99 lines
3.3 KiB
C
99 lines
3.3 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) 2012 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, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_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_PRIMITIVE_TEXTURE_H__
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#define __COGL_PRIMITIVE_TEXTURE_H__
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#include <glib.h>
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G_BEGIN_DECLS
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/**
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* SECTION:cogl-primitive-texture
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* @short_description: Interface for low-level textures like
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* #CoglTexture2D and #CoglTexture3D.
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*
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* A #CoglPrimitiveTexture is a texture that is directly represented
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* by a single texture on the GPU. For example these could be a
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* #CoglTexture2D, #CoglTexture3D or #CoglTextureRectangle. This is
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* opposed to high level meta textures which may be composed of
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* multiple primitive textures or a sub-region of another texture such
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* as #CoglAtlasTexture and #CoglTexture2DSliced.
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*
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* A texture that implements this interface can be directly used with
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* the attributes API such as cogl_framebuffer_draw_attributes().
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* Other types of textures need to be first resolved to primitive
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* textures using the #CoglMetaTexture interface.
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*
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* <note>Most developers won't need to use this interface directly but
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* still it is worth understanding the distinction between high-level
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* and primitive textures because you may find other references in the
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* documentation that detail limitations of using
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* primitive textures.</note>
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*/
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typedef struct _CoglPrimitiveTexture CoglPrimitiveTexture;
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#define COGL_PRIMITIVE_TEXTURE(X) ((CoglPrimitiveTexture *)X)
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/**
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* cogl_is_primitive_texture:
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* @object: A #CoglObject pointer
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*
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* Gets whether the given object references a primitive texture object.
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*
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* Return value: %TRUE if the pointer references a primitive texture, and
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* %FALSE otherwise
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* Since: 2.0
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* Stability: unstable
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*/
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gboolean
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cogl_is_primitive_texture (void *object);
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/**
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* cogl_primitive_texture_set_auto_mipmap:
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* @primitive_texture: A #CoglPrimitiveTexture
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* @value: The new value for whether to auto mipmap
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*
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* Sets whether the texture will automatically update the smaller
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* mipmap levels after any part of level 0 is updated. The update will
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* only occur whenever the texture is used for drawing with a texture
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* filter that requires the lower mipmap levels. An application should
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* disable this if it wants to upload its own data for the other
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* levels. By default auto mipmapping is enabled.
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*
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* Since: 2.0
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* Stability: unstable
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*/
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void
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cogl_primitive_texture_set_auto_mipmap (CoglPrimitiveTexture *primitive_texture,
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gboolean value);
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G_END_DECLS
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#endif /* __COGL_PRIMITIVE_TEXTURE_H__ */
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