mirror of
https://github.com/netsurf-browser/netsurf
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3d9a1198db
Reduce constant bitmap overhead per reference by moving to a flag word. Allow bitmaps to be reduced back to their raw data to free extra memory in a highly efficient manner. svn path=/import/netsurf/; revision=2089
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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*/
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/** \file
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* Generic bitmap handling (interface).
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*
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* This interface wraps the native platform-specific image format, so that
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* portable image convertors can be written.
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*
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* The bitmap format is either RGBA.
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*/
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#ifndef _NETSURF_IMAGE_BITMAP_H_
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#define _NETSURF_IMAGE_BITMAP_H_
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#include <stdbool.h>
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#include <stdlib.h>
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#define BITMAP_NEW 0
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#define BITMAP_OPAQUE (1 << 0) /** image is opaque */
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#define BITMAP_MODIFIED (1 << 1) /** buffer has been modified */
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#define BITMAP_PERSISTENT (1 << 2) /** retain between sessions */
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#define BITMAP_CLEAR_MEMORY (1 << 3) /** memory should be wiped */
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#define BITMAP_SUSPENDED (1 << 4) /** currently suspended */
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#define BITMAP_READY (1 << 5) /** fully initialised */
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struct content;
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/** An opaque image. */
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struct bitmap;
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struct bitmap *bitmap_create(int width, int height, unsigned int state);
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void bitmap_set_opaque(struct bitmap *bitmap, bool opaque);
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bool bitmap_test_opaque(struct bitmap *bitmap);
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bool bitmap_get_opaque(struct bitmap *bitmap);
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char *bitmap_get_buffer(struct bitmap *bitmap);
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size_t bitmap_get_rowstride(struct bitmap *bitmap);
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void bitmap_destroy(struct bitmap *bitmap);
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bool bitmap_save(struct bitmap *bitmap, const char *path);
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void bitmap_modified(struct bitmap *bitmap);
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void bitmap_set_suspendable(struct bitmap *bitmap, void *private_word,
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void (*invalidate)(struct bitmap *bitmap, void *private_word));
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#endif
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