mirror of https://github.com/GNOME/gimp.git
130 lines
2.6 KiB
C
130 lines
2.6 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program 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; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "appenv.h"
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#include "colormaps.h"
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#include "gimage.h"
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#include "gximage.h"
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typedef struct _GXImage GXImage;
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struct _GXImage
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{
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long width, height; /* width and height of ximage structure */
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GdkVisual *visual; /* visual appropriate to our depth */
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GdkGC *gc; /* graphics context */
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guchar *data;
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};
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/* The static gximages for drawing to windows */
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static GXImage *gximage = NULL;
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#define QUANTUM 32
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/* STATIC functions */
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static GXImage *
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create_gximage (GdkVisual *visual, int width, int height)
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{
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GXImage * gximage;
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gximage = g_new (GXImage, 1);
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gximage->visual = visual;
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gximage->gc = NULL;
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gximage->data = g_malloc (width * height * 3);
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return gximage;
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}
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static void
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delete_gximage (GXImage *gximage)
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{
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g_free (gximage->data);
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if (gximage->gc)
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gdk_gc_destroy (gximage->gc);
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g_free (gximage);
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}
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/****************************************************************/
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/* Function definitions */
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void
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gximage_init (void)
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{
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gximage = create_gximage (g_visual, GXIMAGE_WIDTH, GXIMAGE_HEIGHT);
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}
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void
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gximage_free (void)
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{
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delete_gximage (gximage);
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}
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guchar*
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gximage_get_data (void)
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{
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return gximage->data;
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}
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int
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gximage_get_bpp (void)
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{
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return 3;
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}
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int
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gximage_get_bpl (void)
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{
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return 3 * GXIMAGE_WIDTH;
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}
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int
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gximage_get_byte_order (void)
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{
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return GDK_MSB_FIRST;
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}
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void
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gximage_put (GdkWindow *win, int x, int y, int w, int h, int xdith, int ydith)
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{
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/* create the GC if it doesn't yet exist */
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if (!gximage->gc)
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{
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gximage->gc = gdk_gc_new (win);
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gdk_gc_set_exposures (gximage->gc, TRUE);
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}
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gdk_draw_rgb_image_dithalign (win,
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gximage->gc,
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x,
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y,
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w,
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h,
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/* todo: make configurable */
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GDK_RGB_DITHER_MAX,
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gximage->data,
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GXIMAGE_WIDTH * 3,
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xdith, ydith);
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}
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