54735dec84
The coding style has for a long time said to avoid using redundant glib
data types such as gint or gchar etc because we feel that they make the
code look unnecessarily foreign to developers coming from outside of the
Gnome developer community.
Note: When we tried to find the historical rationale for the types we
just found that they were apparently only added for consistent syntax
highlighting which didn't seem that compelling.
Up until now we have been continuing to use some of the platform
specific type such as gint{8,16,32,64} and gsize but this patch switches
us over to using the standard c99 equivalents instead so we can further
ensure that our code looks familiar to the widest range of C developers
who might potentially contribute to Cogl.
So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this
switches all Cogl code to instead use the int{8,16,32,64}_t and
uint{8,16,32,64}_t c99 types instead.
Instead of gsize we now use size_t
For now we are not going to use the c99 _Bool type and instead we have
introduced a new CoglBool type to use instead of gboolean.
Reviewed-by: Neil Roberts <neil@linux.intel.com>
(cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
126 lines
4 KiB
C
126 lines
4 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(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_SUB_TEXTURE_H
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#define __COGL_SUB_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-sub-texture
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* @short_description: Functions for creating and manipulating
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* sub-textures.
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*
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* These functions allow high-level textures to be created that
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* represent a sub-region of another texture. For example these
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* can be used to implement custom texture atlasing schemes.
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*/
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#define COGL_SUB_TEXTURE(tex) ((CoglSubTexture *) tex)
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typedef struct _CoglSubTexture CoglSubTexture;
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#define cogl_sub_texture_new cogl_sub_texture_new_EXP
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/**
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* cogl_sub_texture_new:
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* @context: A #CoglContext pointer
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* @parent_texture: The full texture containing a sub-region you want
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* to make a #CoglSubTexture from.
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* @sub_x: The top-left x coordinate of the parent region to make
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* a texture from.
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* @sub_y: The top-left y coordinate of the parent region to make
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* a texture from.
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* @sub_width: The width of the parent region to make a texture from.
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* @sub_height: The height of the parent region to make a texture
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* from.
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*
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* Creates a high-level #CoglSubTexture representing a sub-region of
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* any other #CoglTexture. The sub-region must strictly lye within the
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* bounds of the @parent_texture. The returned texture implements the
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* #CoglMetaTexture interface because it's not a low level texture
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* that hardware can understand natively.
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*
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* <note>Remember: Unless you are using high level drawing APIs such
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* as cogl_rectangle() or other APIs documented to understand the
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* #CoglMetaTexture interface then you need to use the
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* #CoglMetaTexture interface to resolve a #CoglSubTexture into a
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* low-level texture before drawing.</note>
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*
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* Returns: A newly allocated #CoglSubTexture representing a
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* sub-region of @parent_texture.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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CoglSubTexture *
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cogl_sub_texture_new (CoglContext *ctx,
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CoglTexture *parent_texture,
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int sub_x,
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int sub_y,
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int sub_width,
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int sub_height);
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/**
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* cogl_sub_texture_get_parent:
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* @sub_texture: A pointer to a #CoglSubTexture
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*
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* Retrieves the parent texture that @sub_texture derives its content
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* from. This is the texture that was passed to
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* cogl_sub_texture_new() as the parent_texture argument.
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*
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* Return value: (transfer none): The parent texture that @sub_texture
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* derives its content from.
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* Since: 1.10
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* Stability: unstable
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*/
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CoglTexture *
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cogl_sub_texture_get_parent (CoglSubTexture *sub_texture);
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#define cogl_is_sub_texture cogl_is_sub_texture_EXP
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/**
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* cogl_is_sub_texture:
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* @object: a #CoglObject
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*
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* Checks whether @object is a #CoglSubTexture.
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*
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* Return value: %TRUE if the passed @object represents a
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* #CoglSubTexture and %FALSE otherwise.
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*
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* Since: 1.10
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* Stability: unstable
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*/
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CoglBool
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cogl_is_sub_texture (void *object);
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G_END_DECLS
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#endif /* __COGL_SUB_TEXTURE_H */
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