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https://github.com/netsurf-browser/netsurf
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Otherwise, each source file that includes the header will create a new definition, which are usually merged together by the linker. Multiple definitions of an object is not allowed in ISO C.
117 lines
3.3 KiB
C
117 lines
3.3 KiB
C
/*
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* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _NETSURF_RISCOS_BITMAP_H_
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#define _NETSURF_RISCOS_BITMAP_H_
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struct osspriteop_area;
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struct osspriteop_header;
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struct hlcache_handle;
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struct bitmap;
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/** bitmap operations table */
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extern struct gui_bitmap_table *riscos_bitmap_table;
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/** save with full alpha channel (if not opaque) */
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#define BITMAP_SAVE_FULL_ALPHA (1 << 0)
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/**
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* RISC OS wimp toolkit bitmap.
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*/
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struct bitmap {
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int width; /**< width of bitmap */
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int height; /**< height of bitmap */
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unsigned int state; /**< The bitmap attributes (opaque/dirty etc.) */
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struct osspriteop_area *sprite_area; /**< Uncompressed data, or NULL */
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};
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/**
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* Convert bitmap to 8bpp sprite.
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*
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* \param bitmap the bitmap to convert.
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* \return The converted sprite.
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*/
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struct osspriteop_area *riscos_bitmap_convert_8bpp(struct bitmap *bitmap);
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/**
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* Render content into bitmap.
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*
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* \param bitmap the bitmap to draw to
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* \param content content structure to render
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* \return true on success and bitmap updated else false
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*/
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nserror riscos_bitmap_render(struct bitmap *bitmap, struct hlcache_handle *content);
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/**
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* Overlay a sprite onto the given bitmap
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*
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* \param bitmap bitmap object
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* \param s 8bpp sprite to be overlayed onto bitmap
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*/
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void riscos_bitmap_overlay_sprite(struct bitmap *bitmap, const struct osspriteop_header *s);
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/**
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* Create a bitmap.
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*
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* \param width width of image in pixels
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* \param height width of image in pixels
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* \param state the state to create the bitmap in.
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* \return an opaque struct bitmap, or NULL on memory exhaustion
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*/
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void *riscos_bitmap_create(int width, int height, unsigned int state);
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/**
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* Free a bitmap.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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*/
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void riscos_bitmap_destroy(void *vbitmap);
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/**
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* Return a pointer to the pixel data in a bitmap.
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*
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* The pixel data is packed as BITMAP_FORMAT, possibly with padding at
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* the end of rows. The width of a row in bytes is given by
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* riscos_bitmap_get_rowstride().
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*
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* \param vbitmap A bitmap as returned by riscos_bitmap_create()
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* \return pointer to the pixel buffer
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*/
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unsigned char *riscos_bitmap_get_buffer(void *vbitmap);
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/**
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* Gets whether a bitmap should be plotted opaque
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*
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* \param vbitmap A bitmap, as returned by riscos_bitmap_create()
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*/
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bool riscos_bitmap_get_opaque(void *vbitmap);
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/**
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* Save a bitmap in the platform's native format.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \param path pathname for file
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* \param flags modify the behaviour of the save
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* \return true on success, false on error and error reported
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*/
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bool riscos_bitmap_save(void *vbitmap, const char *path, unsigned flags);
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#endif
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