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a7aad27212
There was a header dependency problem which meant that cogl-texture-private.h couldn't be included without first including cogl-bitmap.h
215 lines
7.0 KiB
C
215 lines
7.0 KiB
C
/*
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* Clutter COGL
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*
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* A basic GL/GLES Abstraction/Utility Layer
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2007 OpenedHand
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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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#ifndef __COGL_BITMAP_H
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#define __COGL_BITMAP_H
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#include <glib.h>
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#include "cogl-handle.h"
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#include "cogl-buffer.h"
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#include "cogl-bitmap.h"
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/*
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* CoglBitmapDestroyNotify:
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* @data: The image data
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* @destroy_data: The callback closure data that was given to
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* _cogl_bitmap_new_from_data().
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*
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* Function prototype that is used to destroy the bitmap data when
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* _cogl_bitmap_new_from_data() is called.
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*/
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typedef void (* CoglBitmapDestroyNotify) (guint8 *data, void *destroy_data);
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/*
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* _cogl_bitmap_new_from_data:
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* @data: A pointer to the data. The bitmap will take ownership of this data.
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* @format: The format of the pixel data.
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* @width: The width of the bitmap.
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* @height: The height of the bitmap.
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* @rowstride: The rowstride of the bitmap (the number of bytes from
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* the start of one row of the bitmap to the next).
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* @destroy_fn: A function to be called when the bitmap is
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* destroyed. This should free @data. %NULL can be used instead if
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* no free is needed.
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* @destroy_fn_data: This pointer will get passed to @destroy_fn.
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*
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* Creates a bitmap using some existing data. The data is not copied
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* so the bitmap will take ownership of the data pointer. When the
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* bitmap is freed @destroy_fn will be called to free the data.
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*
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* Return value: A new %CoglBitmap.
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*/
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CoglBitmap *
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_cogl_bitmap_new_from_data (guint8 *data,
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CoglPixelFormat format,
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int width,
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int height,
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int rowstride,
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CoglBitmapDestroyNotify destroy_fn,
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gpointer destroy_fn_data);
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/* The idea of this function is that it will create a bitmap that
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shares the actual data with another bitmap. This is needed for the
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atlas texture backend because it needs upload a bitmap to a sub
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texture but override the format so that it ignores the premult
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flag. */
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CoglBitmap *
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_cogl_bitmap_new_shared (CoglBitmap *shared_bmp,
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CoglPixelFormat format,
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int width,
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int height,
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int rowstride);
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/* This creates a cogl bitmap that internally references a pixel
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array. The data is not copied. _cogl_bitmap_map will divert to
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mapping the pixel array */
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CoglBitmap *
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_cogl_bitmap_new_from_buffer (CoglBuffer *buffer,
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CoglPixelFormat format,
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int width,
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int height,
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int rowstride,
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int offset);
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gboolean
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_cogl_bitmap_can_convert (CoglPixelFormat src, CoglPixelFormat dst);
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gboolean
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_cogl_bitmap_fallback_can_convert (CoglPixelFormat src, CoglPixelFormat dst);
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gboolean
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_cogl_bitmap_can_unpremult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_fallback_can_unpremult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_can_premult (CoglPixelFormat format);
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gboolean
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_cogl_bitmap_fallback_can_premult (CoglPixelFormat format);
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CoglBitmap *
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_cogl_bitmap_convert (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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CoglBitmap *
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_cogl_bitmap_fallback_convert (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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gboolean
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_cogl_bitmap_unpremult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_fallback_unpremult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_premult (CoglBitmap *dst_bmp);
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gboolean
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_cogl_bitmap_fallback_premult (CoglBitmap *dst_bmp);
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CoglBitmap *
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_cogl_bitmap_from_file (const char *filename,
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GError **error);
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CoglBitmap *
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_cogl_bitmap_fallback_from_file (const char *filename);
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gboolean
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_cogl_bitmap_convert_premult_status (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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CoglBitmap *
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_cogl_bitmap_convert_format_and_premult (CoglBitmap *bmp,
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CoglPixelFormat dst_format);
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void
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_cogl_bitmap_copy_subregion (CoglBitmap *src,
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CoglBitmap *dst,
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int src_x,
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int src_y,
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int dst_x,
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int dst_y,
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int width,
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int height);
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/* Creates a deep copy of the source bitmap */
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CoglBitmap *
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_cogl_bitmap_copy (CoglBitmap *src_bmp);
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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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CoglPixelFormat
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_cogl_bitmap_get_format (CoglBitmap *bitmap);
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void
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_cogl_bitmap_set_format (CoglBitmap *bitmap,
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CoglPixelFormat format);
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int
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_cogl_bitmap_get_width (CoglBitmap *bitmap);
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int
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_cogl_bitmap_get_height (CoglBitmap *bitmap);
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int
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_cogl_bitmap_get_rowstride (CoglBitmap *bitmap);
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/* Maps the bitmap so that the pixels can be accessed directly or if
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the bitmap is just a memory bitmap then it just returns the pointer
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to memory. Note that the bitmap isn't guaranteed to allocated to
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the full size of rowstride*height so it is not safe to read up to
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the rowstride of the last row. This will be the case if the user
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uploads data using gdk_pixbuf_new_subpixbuf with a sub region
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containing the last row of the pixbuf because in that case the
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rowstride can be much larger than the width of the image */
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guint8 *
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_cogl_bitmap_map (CoglBitmap *bitmap,
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CoglBufferAccess access,
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CoglBufferMapHint hints);
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void
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_cogl_bitmap_unmap (CoglBitmap *bitmap);
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/* These two are replacements for map and unmap that should used when
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the pointer is going to be passed to GL for pixel packing or
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unpacking. The address might not be valid for reading if the bitmap
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was created with new_from_buffer but it will however be good to
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pass to glTexImage2D for example. The access should be READ for
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unpacking and WRITE for packing. It can not be both */
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guint8 *
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_cogl_bitmap_bind (CoglBitmap *bitmap,
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CoglBufferAccess access,
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CoglBufferMapHint hints);
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void
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_cogl_bitmap_unbind (CoglBitmap *bitmap);
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#endif /* __COGL_BITMAP_H */
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