mirror of
https://github.com/netsurf-browser/netsurf
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143 lines
3.1 KiB
C
143 lines
3.1 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 (GDK / GTK+ implementation).
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*
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* This implements the interface given by desktop/bitmap.h using GdkPixbufs.
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*/
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#include <assert.h>
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#include <stdbool.h>
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#include <string.h>
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#include <gdk/gdk.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "netsurf/content/content.h"
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#include "netsurf/image/bitmap.h"
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extern GdkDrawable *current_drawable;
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extern GdkGC *current_gc;
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struct bitmap;
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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 clear whether to clear the image ready for use
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* \return an opaque struct bitmap, or NULL on memory exhaustion
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*/
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struct bitmap *bitmap_create(int width, int height, bool clear)
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{
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GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8,
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width, height);
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return (struct bitmap *) pixbuf;
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}
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/**
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* Sets whether a bitmap should be plotted opaque
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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* \param opaque whether the bitmap should be plotted opaque
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*/
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void bitmap_set_opaque(struct bitmap *bitmap, bool opaque)
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{
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assert(bitmap);
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/* todo: set bitmap as opaque */
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}
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/**
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* Tests whether a bitmap has an opaque alpha channel
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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* \return whether the bitmap is opaque
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*/
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bool bitmap_test_opaque(struct bitmap *bitmap)
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{
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assert(bitmap);
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/* todo: test if bitmap as opaque */
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return false;
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}
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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 bitmap a bitmap, as returned by bitmap_create()
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*/
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bool bitmap_get_opaque(struct bitmap *bitmap)
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{
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assert(bitmap);
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/* todo: get whether bitmap is opaque */
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return false;
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}
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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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* \param bitmap a bitmap, as returned by bitmap_create()
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* \return pointer to the pixel buffer
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*
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* The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
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* of rows. The width of a row in bytes is given by bitmap_get_rowstride().
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*/
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char *bitmap_get_buffer(struct bitmap *bitmap)
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{
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assert(bitmap);
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return gdk_pixbuf_get_pixels((GdkPixbuf *) bitmap);
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}
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/**
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* Find the width of a pixel row in bytes.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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* \return width of a pixel row in the bitmap
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*/
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size_t bitmap_get_rowstride(struct bitmap *bitmap)
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{
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assert(bitmap);
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return gdk_pixbuf_get_rowstride((GdkPixbuf *) bitmap);
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}
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/**
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* Free a bitmap.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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*/
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void bitmap_destroy(struct bitmap *bitmap)
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{
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assert(bitmap);
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g_object_unref((GdkPixbuf *) bitmap);
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}
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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 bitmap a bitmap, as returned by bitmap_create()
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* \param path pathname for file
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* \return true on success, false on error and error reported
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*/
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bool bitmap_save(struct bitmap *bitmap, const char *path)
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{
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return true;
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}
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