42dcffbc3a
There are many places in the texture backend that need to do conversion using the CoglBitmap code. Currently none of these functions can throw an error but they do return a value to indicate failure. In future it would make sense if new texture functions could throw an error and in that case they would want to use a CoglBitmap error if the failure was due to the conversion. This moves the internal CoglBitmap error from the quartz backend to be public in cogl-bitmap.h so that it can be used in this way.
132 lines
3.4 KiB
C
132 lines
3.4 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) 2007,2008,2009 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 <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_BITMAP_H__
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#define __COGL_BITMAP_H__
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#include <cogl/cogl-types.h>
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G_BEGIN_DECLS
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typedef struct _CoglBitmap CoglBitmap;
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/**
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* SECTION:cogl-bitmap
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* @short_description: Fuctions for loading images
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*
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* Cogl allows loading image data into memory as CoglBitmaps without
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* loading them immediately into GPU textures.
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*
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* #CoglBitmap is available since Cogl 1.0
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*/
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/**
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* cogl_bitmap_new_from_file:
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* @filename: the file to load.
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* @error: a #GError or %NULL.
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*
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* Loads an image file from disk. This function can be safely called from
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* within a thread.
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*
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* Return value: a #CoglBitmap to the new loaded image data, or
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* %NULL if loading the image failed.
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*
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* Since: 1.0
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*/
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CoglBitmap *
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cogl_bitmap_new_from_file (const char *filename,
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GError **error);
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/**
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* cogl_bitmap_get_size_from_file:
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* @filename: the file to check
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* @width: (out): return location for the bitmap width, or %NULL
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* @height: (out): return location for the bitmap height, or %NULL
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*
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* Parses an image file enough to extract the width and height
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* of the bitmap.
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*
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* Return value: %TRUE if the image was successfully parsed
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*
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* Since: 1.0
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*/
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gboolean
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cogl_bitmap_get_size_from_file (const char *filename,
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int *width,
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int *height);
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/**
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* cogl_is_bitmap:
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* @handle: a #CoglHandle for a bitmap
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*
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* Checks whether @handle is a #CoglHandle for a bitmap
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*
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* Return value: %TRUE if the passed handle represents a bitmap,
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* and %FALSE otherwise
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*
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* Since: 1.0
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*/
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gboolean
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cogl_is_bitmap (CoglHandle handle);
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/**
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* COGL_BITMAP_ERROR:
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*
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* #GError domain for bitmap errors.
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*
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* Since: 1.4
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*/
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#define COGL_BITMAP_ERROR (cogl_bitmap_error_quark ())
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/**
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* CoglBitmapError:
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* @COGL_BITMAP_ERROR_FAILED: Generic failure code, something went
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* wrong.
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* @COGL_ERROR_UNKNOWN_TYPE: Unknown image type.
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* @COGL_ERROR_CORRUPT_IMAGE: An image file was broken somehow.
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*
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* Error codes that can be thrown when performing bitmap
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* operations. Note that gdk_pixbuf_new_from_file() can also throw
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* errors directly from the underlying image loading library. For
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* example, if GdkPixbuf is used then errors #GdkPixbufError<!-- -->s
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* will be used directly.
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*
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* Since: 1.4
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*/
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typedef enum {
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COGL_BITMAP_ERROR_FAILED,
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COGL_BITMAP_ERROR_UNKNOWN_TYPE,
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COGL_BITMAP_ERROR_CORRUPT_IMAGE
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} CoglBitmapError;
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GQuark cogl_bitmap_error_quark (void);
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G_END_DECLS
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#endif /* __COGL_BITMAP_H__ */
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