1686e754a7
This adds some android specific api for creating a CoglBitmap from an Android asset. As part of the work it also seemed like a good time to change the internal bitmap constructors to take an explicit CoglContext argument and so the public cogl_bitmap_new_from_file() api was also changed accordingly to take a CoglContext pointer as the first argument. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit 099d6d1b505b55bbd09c50d081deb41ab5764e19) Since we aren't able to break APIs on the 1.12 branch this cherry-pick skips the change to cogl_bitmap_new_from_file()
314 lines
9 KiB
C
314 lines
9 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2007,2008,2009 Intel Corporation.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
|
|
#error "Only <cogl/cogl.h> can be included directly."
|
|
#endif
|
|
|
|
#ifndef __COGL_BITMAP_H__
|
|
#define __COGL_BITMAP_H__
|
|
|
|
#include <cogl/cogl-types.h>
|
|
#include <cogl/cogl-buffer.h>
|
|
#include <cogl/cogl-context.h>
|
|
#include <cogl/cogl-pixel-buffer.h>
|
|
|
|
#ifdef COGL_HAS_ANDROID_SUPPORT
|
|
#include <android/asset_manager.h>
|
|
#endif
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _CoglBitmap CoglBitmap;
|
|
|
|
/**
|
|
* SECTION:cogl-bitmap
|
|
* @short_description: Fuctions for loading images
|
|
*
|
|
* Cogl allows loading image data into memory as CoglBitmaps without
|
|
* loading them immediately into GPU textures.
|
|
*
|
|
* #CoglBitmap is available since Cogl 1.0
|
|
*/
|
|
|
|
|
|
/**
|
|
* cogl_bitmap_new_from_file:
|
|
* @filename: the file to load.
|
|
* @error: a #GError or %NULL.
|
|
*
|
|
* Loads an image file from disk. This function can be safely called from
|
|
* within a thread.
|
|
*
|
|
* Return value: a #CoglBitmap to the new loaded image data, or
|
|
* %NULL if loading the image failed.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
CoglBitmap *
|
|
cogl_bitmap_new_from_file (const char *filename,
|
|
GError **error);
|
|
|
|
#ifdef COGL_HAS_ANDROID_SUPPORT
|
|
/**
|
|
* cogl_android_bitmap_new_from_asset:
|
|
* @context: A #CoglContext
|
|
* @manager: An Android Asset Manager.
|
|
* @filename: The file name for the asset
|
|
* @error: A return location for a GError exception.
|
|
*
|
|
* Loads an Android asset into a newly allocated #CoglBitmap.
|
|
*
|
|
* Return value: A newly allocated #CoglBitmap holding the image data of the
|
|
* specified asset.
|
|
*
|
|
* Since: 2.0
|
|
*/
|
|
CoglBitmap *
|
|
cogl_android_bitmap_new_from_asset (CoglContext *context,
|
|
AAssetManager *manager,
|
|
const char *filename,
|
|
GError **error);
|
|
#endif
|
|
|
|
#if defined (COGL_ENABLE_EXPERIMENTAL_API)
|
|
|
|
/**
|
|
* cogl_bitmap_new_from_buffer:
|
|
* @buffer: A #CoglBuffer containing image data
|
|
* @format: The #CoglPixelFormat defining the format of the image data
|
|
* in the given @buffer.
|
|
* @width: The width of the image data in the given @buffer.
|
|
* @height: The height of the image data in the given @buffer.
|
|
* @rowstride: The rowstride in bytes of the image data in the given @buffer.
|
|
* @offset: The offset into the given @buffer to the first pixel that
|
|
* should be considered part of the #CoglBitmap.
|
|
*
|
|
* Wraps some image data that has been uploaded into a #CoglBuffer as
|
|
* a #CoglBitmap. The data is not copied in this process.
|
|
*
|
|
* Return value: a #CoglBitmap encapsulating the given @buffer.
|
|
*
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
*/
|
|
CoglBitmap *
|
|
cogl_bitmap_new_from_buffer (CoglBuffer *buffer,
|
|
CoglPixelFormat format,
|
|
int width,
|
|
int height,
|
|
int rowstride,
|
|
int offset);
|
|
|
|
/**
|
|
* cogl_bitmap_new_with_size:
|
|
* @context: A #CoglContext
|
|
* @width: width of the bitmap in pixels
|
|
* @height: height of the bitmap in pixels
|
|
* @format: the format of the pixels the array will store
|
|
*
|
|
* Creates a new #CoglBitmap with the given width, height and format.
|
|
* The initial contents of the bitmap are undefined.
|
|
*
|
|
* The data for the bitmap will be stored in a newly created
|
|
* #CoglPixelBuffer. You can get a pointer to the pixel buffer using
|
|
* cogl_bitmap_get_pixel_buffer(). The #CoglBuffer API can then be
|
|
* used to fill the bitmap with data.
|
|
*
|
|
* <note>Cogl will try its best to provide a hardware array you can
|
|
* map, write into and effectively do a zero copy upload when creating
|
|
* a texture from it with cogl_texture_new_from_bitmap(). For various
|
|
* reasons, such arrays are likely to have a stride larger than width
|
|
* * bytes_per_pixel. The user must take the stride into account when
|
|
* writing into it. The stride can be retrieved with
|
|
* cogl_bitmap_get_rowstride().</note>
|
|
*
|
|
* Return value: a #CoglPixelBuffer representing the newly created array or
|
|
* %NULL on failure
|
|
*
|
|
* Since: 1.10
|
|
* Stability: Unstable
|
|
*/
|
|
CoglBitmap *
|
|
cogl_bitmap_new_with_size (CoglContext *context,
|
|
unsigned int width,
|
|
unsigned int height,
|
|
CoglPixelFormat format);
|
|
|
|
/**
|
|
* cogl_bitmap_new_for_data:
|
|
* @context: A #CoglContext
|
|
* @width: The width of the bitmap.
|
|
* @height: The height of the bitmap.
|
|
* @format: The format of the pixel data.
|
|
* @rowstride: The rowstride of the bitmap (the number of bytes from
|
|
* the start of one row of the bitmap to the next).
|
|
* @data: A pointer to the data. The bitmap will take ownership of this data.
|
|
*
|
|
* Creates a bitmap using some existing data. The data is not copied
|
|
* so the application must keep the buffer alive for the lifetime of
|
|
* the #CoglBitmap. This can be used for example with
|
|
* cogl_framebuffer_read_pixels_into_bitmap() to read data directly
|
|
* into an application buffer with the specified rowstride.
|
|
*
|
|
* Return value: A new #CoglBitmap.
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
CoglBitmap *
|
|
cogl_bitmap_new_for_data (CoglContext *context,
|
|
int width,
|
|
int height,
|
|
CoglPixelFormat format,
|
|
int rowstride,
|
|
uint8_t *data);
|
|
|
|
/**
|
|
* cogl_bitmap_get_format:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Return value: the #CoglPixelFormat that the data for the bitmap is in.
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
CoglPixelFormat
|
|
cogl_bitmap_get_format (CoglBitmap *bitmap);
|
|
|
|
/**
|
|
* cogl_bitmap_get_width:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Return value: the width of the bitmap
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
int
|
|
cogl_bitmap_get_width (CoglBitmap *bitmap);
|
|
|
|
/**
|
|
* cogl_bitmap_get_height:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Return value: the height of the bitmap
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
int
|
|
cogl_bitmap_get_height (CoglBitmap *bitmap);
|
|
|
|
/**
|
|
* cogl_bitmap_get_rowstride:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Return value: the rowstride of the bitmap. This is the number of
|
|
* bytes between the address of start of one row to the address of the
|
|
* next row in the image.
|
|
* Since: 1.10
|
|
* Stability: unstable
|
|
*/
|
|
int
|
|
cogl_bitmap_get_rowstride (CoglBitmap *bitmap);
|
|
|
|
/**
|
|
* cogl_bitmap_get_buffer:
|
|
* @bitmap: A #CoglBitmap
|
|
*
|
|
* Return value: the #CoglPixelBuffer that this buffer uses for
|
|
* storage. Note that if the bitmap was created with
|
|
* cogl_bitmap_new_from_file() then it will not actually be using a
|
|
* pixel buffer and this function will return %NULL.
|
|
* Stability: unstable
|
|
* Since: 1.10
|
|
*/
|
|
CoglPixelBuffer *
|
|
cogl_bitmap_get_buffer (CoglBitmap *bitmap);
|
|
|
|
#endif /* COGL_ENABLE_EXPERIMENTAL_API */
|
|
|
|
/**
|
|
* cogl_bitmap_get_size_from_file:
|
|
* @filename: the file to check
|
|
* @width: (out): return location for the bitmap width, or %NULL
|
|
* @height: (out): return location for the bitmap height, or %NULL
|
|
*
|
|
* Parses an image file enough to extract the width and height
|
|
* of the bitmap.
|
|
*
|
|
* Return value: %TRUE if the image was successfully parsed
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
CoglBool
|
|
cogl_bitmap_get_size_from_file (const char *filename,
|
|
int *width,
|
|
int *height);
|
|
|
|
/**
|
|
* cogl_is_bitmap:
|
|
* @object: a #CoglObject pointer
|
|
*
|
|
* Checks whether @object is a #CoglBitmap
|
|
*
|
|
* Return value: %TRUE if the passed @object represents a bitmap,
|
|
* and %FALSE otherwise
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
CoglBool
|
|
cogl_is_bitmap (void *object);
|
|
|
|
/**
|
|
* COGL_BITMAP_ERROR:
|
|
*
|
|
* #GError domain for bitmap errors.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
#define COGL_BITMAP_ERROR (cogl_bitmap_error_quark ())
|
|
|
|
/**
|
|
* CoglBitmapError:
|
|
* @COGL_BITMAP_ERROR_FAILED: Generic failure code, something went
|
|
* wrong.
|
|
* @COGL_BITMAP_ERROR_UNKNOWN_TYPE: Unknown image type.
|
|
* @COGL_BITMAP_ERROR_CORRUPT_IMAGE: An image file was broken somehow.
|
|
*
|
|
* Error codes that can be thrown when performing bitmap
|
|
* operations. Note that gdk_pixbuf_new_from_file() can also throw
|
|
* errors directly from the underlying image loading library. For
|
|
* example, if GdkPixbuf is used then errors #GdkPixbufError<!-- -->s
|
|
* will be used directly.
|
|
*
|
|
* Since: 1.4
|
|
*/
|
|
typedef enum {
|
|
COGL_BITMAP_ERROR_FAILED,
|
|
COGL_BITMAP_ERROR_UNKNOWN_TYPE,
|
|
COGL_BITMAP_ERROR_CORRUPT_IMAGE
|
|
} CoglBitmapError;
|
|
|
|
GQuark cogl_bitmap_error_quark (void);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __COGL_BITMAP_H__ */
|