mirror of https://github.com/GNOME/gimp.git
995 lines
25 KiB
C
995 lines
25 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 "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <gtk/gtk.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "display-types.h"
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#include "base/tile-manager.h"
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#include "base/tile.h"
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#include "core/gimp.h"
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#include "core/gimpdrawable.h"
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#include "core/gimpimage.h"
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#include "core/gimpimage-colormap.h"
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#include "core/gimpprojection.h"
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#include "widgets/gimprender.h"
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#include "gimpcanvas.h"
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#include "gimpdisplay.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-filter.h"
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#include "gimpdisplayshell-render.h"
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typedef struct _RenderInfo RenderInfo;
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typedef void (* RenderFunc) (RenderInfo *info);
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struct _RenderInfo
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{
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GimpDisplayShell *shell;
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TileManager *src_tiles;
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guint *alpha;
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guchar *scale;
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guchar *src;
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guchar *dest;
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gint x, y;
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gint w, h;
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gdouble scalex;
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gdouble scaley;
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gint src_x;
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gint src_y;
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gint dest_bpp;
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gint dest_bpl;
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gint dest_width;
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};
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static void render_setup_notify (gpointer config,
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GParamSpec *param_spec,
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Gimp *gimp);
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static guchar *tile_buf = NULL;
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static guint tile_shift = 0;
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static guint check_mod = 0;
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static guint check_shift = 0;
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void
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gimp_display_shell_render_init (Gimp *gimp)
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{
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g_return_if_fail (GIMP_IS_GIMP (gimp));
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g_signal_connect (gimp->config, "notify::transparency-size",
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G_CALLBACK (render_setup_notify),
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gimp);
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g_signal_connect (gimp->config, "notify::transparency-type",
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G_CALLBACK (render_setup_notify),
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gimp);
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render_setup_notify (gimp->config, NULL, gimp);
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}
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void
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gimp_display_shell_render_exit (Gimp *gimp)
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{
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g_return_if_fail (GIMP_IS_GIMP (gimp));
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g_signal_handlers_disconnect_by_func (gimp->config,
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render_setup_notify,
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gimp);
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if (tile_buf)
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{
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g_free (tile_buf);
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tile_buf = NULL;
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}
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}
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static void
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render_setup_notify (gpointer config,
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GParamSpec *param_spec,
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Gimp *gimp)
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{
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GimpCheckSize check_size;
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g_object_get (config,
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"transparency-size", &check_size,
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NULL);
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/* based on the tile size, determine the tile shift amount
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* (assume here that tile_height and tile_width are equal)
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*/
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tile_shift = 0;
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while ((1 << tile_shift) < TILE_WIDTH)
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tile_shift++;
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/* allocate a buffer for arranging information from a row of tiles */
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if (! tile_buf)
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tile_buf = g_new (guchar, GIMP_RENDER_BUF_WIDTH * MAX_CHANNELS);
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switch (check_size)
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{
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case GIMP_CHECK_SIZE_SMALL_CHECKS:
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check_mod = 0x3;
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check_shift = 2;
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break;
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case GIMP_CHECK_SIZE_MEDIUM_CHECKS:
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check_mod = 0x7;
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check_shift = 3;
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break;
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case GIMP_CHECK_SIZE_LARGE_CHECKS:
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check_mod = 0xf;
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check_shift = 4;
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break;
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}
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}
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/* Render Image functions */
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static void render_image_rgb (RenderInfo *info);
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static void render_image_rgb_a (RenderInfo *info);
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static void render_image_gray (RenderInfo *info);
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static void render_image_gray_a (RenderInfo *info);
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static void render_image_indexed (RenderInfo *info);
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static void render_image_indexed_a (RenderInfo *info);
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static void render_image_init_info_full (RenderInfo *info,
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GimpDisplayShell *shell,
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gint x,
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gint y,
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gint w,
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gint h,
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GimpProjection *projection);
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static void render_image_init_info (RenderInfo *info,
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GimpDisplayShell *shell,
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gint x,
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gint y,
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TileManager *tiles);
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static guint * render_image_init_alpha (gint mult);
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static guchar * render_image_accelerate_scaling (gint width,
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gint start,
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gdouble scalex);
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static guchar * render_image_tile_fault (RenderInfo *info);
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static RenderFunc render_funcs[6] =
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{
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render_image_rgb,
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render_image_rgb_a,
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render_image_gray,
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render_image_gray_a,
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render_image_indexed,
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render_image_indexed_a,
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};
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static void gimp_display_shell_render_highlight (GimpDisplayShell *shell,
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gint x,
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gint y,
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gint w,
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gint h,
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GdkRectangle *highlight);
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static void gimp_display_shell_render_mask (GimpDisplayShell *shell,
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RenderInfo *info);
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/*****************************************************************/
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/* This function is the core of the display--it offsets and */
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/* scales the image according to the current parameters in the */
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/* display object. It handles color, grayscale, 8, 15, 16, 24 */
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/* & 32 bit output depths. */
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/*****************************************************************/
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void
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gimp_display_shell_render (GimpDisplayShell *shell,
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gint x,
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gint y,
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gint w,
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gint h,
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GdkRectangle *highlight)
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{
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GimpProjection *projection;
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RenderInfo info;
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GimpImageType type;
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g_return_if_fail (w > 0 && h > 0);
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projection = shell->display->image->projection;
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render_image_init_info_full (&info, shell, x, y, w, h, projection);
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type = gimp_projection_get_image_type (projection);
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/* Currently, only RGBA and GRAYA projection types are used - the rest
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* are in case of future need. -- austin, 28th Nov 1998.
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*/
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if (G_UNLIKELY (type != GIMP_RGBA_IMAGE && type != GIMP_GRAYA_IMAGE))
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g_warning ("using untested projection type %d", type);
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(* render_funcs[type]) (&info);
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/* apply filters to the rendered projection */
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if (shell->filter_stack)
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gimp_color_display_stack_convert (shell->filter_stack,
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shell->render_buf,
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w, h,
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3,
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3 * GIMP_RENDER_BUF_WIDTH);
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/* dim pixels outside the highlighted rectangle */
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if (highlight)
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{
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gimp_display_shell_render_highlight (shell, x, y, w, h, highlight);
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}
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else if (shell->mask)
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{
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render_image_init_info (&info, shell, x, y,
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gimp_drawable_get_tiles (shell->mask));
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gimp_display_shell_render_mask (shell, &info);
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}
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/* put it to the screen */
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gimp_canvas_draw_rgb (GIMP_CANVAS (shell->canvas), GIMP_CANVAS_STYLE_RENDER,
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x + shell->disp_xoffset, y + shell->disp_yoffset,
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w, h,
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shell->render_buf,
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3 * GIMP_RENDER_BUF_WIDTH,
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shell->offset_x, shell->offset_y);
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}
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#define GIMP_DISPLAY_SHELL_DIM_PIXEL(buf,x) \
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{ \
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buf[3 * (x) + 0] >>= 1; \
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buf[3 * (x) + 1] >>= 1; \
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buf[3 * (x) + 2] >>= 1; \
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}
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/* This function highlights the given area by dimming all pixels outside. */
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static void
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gimp_display_shell_render_highlight (GimpDisplayShell *shell,
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gint x,
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gint y,
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gint w,
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gint h,
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GdkRectangle *highlight)
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{
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guchar *buf = shell->render_buf;
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GdkRectangle rect;
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rect.x = shell->offset_x + x;
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rect.y = shell->offset_y + y;
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rect.width = w;
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rect.height = h;
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if (gdk_rectangle_intersect (highlight, &rect, &rect))
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{
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rect.x -= shell->offset_x + x;
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rect.y -= shell->offset_y + y;
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for (y = 0; y < rect.y; y++)
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{
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for (x = 0; x < w; x++)
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GIMP_DISPLAY_SHELL_DIM_PIXEL (buf, x)
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buf += 3 * GIMP_RENDER_BUF_WIDTH;
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}
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for ( ; y < rect.y + rect.height; y++)
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{
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for (x = 0; x < rect.x; x++)
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GIMP_DISPLAY_SHELL_DIM_PIXEL (buf, x)
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for (x += rect.width; x < w; x++)
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GIMP_DISPLAY_SHELL_DIM_PIXEL (buf, x)
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buf += 3 * GIMP_RENDER_BUF_WIDTH;
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}
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for ( ; y < h; y++)
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{
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for (x = 0; x < w; x++)
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GIMP_DISPLAY_SHELL_DIM_PIXEL (buf, x)
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buf += 3 * GIMP_RENDER_BUF_WIDTH;
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}
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}
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else
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{
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for (y = 0; y < h; y++)
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{
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for (x = 0; x < w; x++)
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GIMP_DISPLAY_SHELL_DIM_PIXEL (buf, x)
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buf += 3 * GIMP_RENDER_BUF_WIDTH;
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}
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}
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}
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static void
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gimp_display_shell_render_mask (GimpDisplayShell *shell,
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RenderInfo *info)
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{
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gint y, ye;
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gint x, xe;
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gboolean initial = TRUE;
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y = info->y;
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ye = info->y + info->h;
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xe = info->x + info->w;
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info->src = render_image_tile_fault (info);
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while (TRUE)
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{
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gint error =
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RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
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if (!initial && (error == 0))
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{
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memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
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}
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else
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{
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const guchar *src = info->src;
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guchar *dest = info->dest;
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switch (shell->mask_color)
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{
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case GIMP_RED_CHANNEL:
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for (x = info->x; x < xe; x++, src++, dest += 3)
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{
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if (*src & 0x80)
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continue;
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dest[1] = dest[1] >> 2;
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dest[2] = dest[2] >> 2;
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}
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break;
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case GIMP_GREEN_CHANNEL:
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for (x = info->x; x < xe; x++, src++, dest += 3)
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{
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if (*src & 0x80)
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continue;
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dest[0] = dest[0] >> 2;
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dest[2] = dest[2] >> 2;
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}
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break;
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case GIMP_BLUE_CHANNEL:
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for (x = info->x; x < xe; x++, src++, dest += 3)
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{
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if (*src & 0x80)
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continue;
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dest[0] = dest[0] >> 2;
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dest[1] = dest[1] >> 2;
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}
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break;
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default:
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break;
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}
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}
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if (++y == ye)
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break;
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info->dest += info->dest_bpl;
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if (error)
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{
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info->src_y += error;
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info->src = render_image_tile_fault (info);
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initial = TRUE;
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}
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else
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{
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initial = FALSE;
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}
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}
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}
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/*************************/
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/* 8 Bit functions */
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/*************************/
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static void
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render_image_indexed (RenderInfo *info)
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{
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const guchar *cmap;
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gint y, ye;
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gint x, xe;
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gboolean initial = TRUE;
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cmap = gimp_image_get_colormap (info->shell->display->image);
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y = info->y;
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ye = info->y + info->h;
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xe = info->x + info->w;
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info->src = render_image_tile_fault (info);
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while (TRUE)
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{
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gint error =
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RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
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if (!initial && (error == 0))
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{
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memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
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}
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else
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{
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const guchar *src = info->src;
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guchar *dest = info->dest;
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for (x = info->x; x < xe; x++)
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{
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guint val = src[INDEXED_PIX] * 3;
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src += 1;
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dest[0] = cmap[val + 0];
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dest[1] = cmap[val + 1];
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dest[2] = cmap[val + 2];
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dest += 3;
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}
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}
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if (++y == ye)
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break;
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info->dest += info->dest_bpl;
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if (error)
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{
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info->src_y += error;
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info->src = render_image_tile_fault (info);
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initial = TRUE;
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}
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else
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{
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initial = FALSE;
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}
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}
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}
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static void
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render_image_indexed_a (RenderInfo *info)
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{
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const guint *alpha = info->alpha;
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const guchar *cmap = gimp_image_get_colormap (info->shell->display->image);
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gint y, ye;
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gint x, xe;
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gboolean initial = TRUE;
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y = info->y;
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ye = info->y + info->h;
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xe = info->x + info->w;
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info->src = render_image_tile_fault (info);
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while (TRUE)
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{
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gint error =
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RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
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if (!initial && (error == 0) && (y & check_mod))
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{
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memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
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}
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else
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{
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const guchar *src = info->src;
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guchar *dest = info->dest;
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guint dark_light;
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dark_light = (y >> check_shift) + (info->x >> check_shift);
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for (x = info->x; x < xe; x++)
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{
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guint r, g, b, a = alpha[src[ALPHA_I_PIX]];
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guint val = src[INDEXED_PIX] * 3;
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src += 2;
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if (dark_light & 0x1)
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{
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r = gimp_render_blend_dark_check[(a | cmap[val + 0])];
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g = gimp_render_blend_dark_check[(a | cmap[val + 1])];
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b = gimp_render_blend_dark_check[(a | cmap[val + 2])];
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}
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else
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{
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r = gimp_render_blend_light_check[(a | cmap[val + 0])];
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g = gimp_render_blend_light_check[(a | cmap[val + 1])];
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b = gimp_render_blend_light_check[(a | cmap[val + 2])];
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}
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dest[0] = r;
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dest[1] = g;
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dest[2] = b;
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dest += 3;
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if (((x + 1) & check_mod) == 0)
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dark_light += 1;
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}
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}
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if (++y == ye)
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break;
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info->dest += info->dest_bpl;
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if (error)
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{
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info->src_y += error;
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info->src = render_image_tile_fault (info);
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initial = TRUE;
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}
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else
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{
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initial = FALSE;
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}
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}
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}
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|
|
static void
|
|
render_image_gray (RenderInfo *info)
|
|
{
|
|
gint y, ye;
|
|
gint x, xe;
|
|
gboolean initial = TRUE;
|
|
|
|
y = info->y;
|
|
ye = info->y + info->h;
|
|
xe = info->x + info->w;
|
|
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error =
|
|
RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
|
|
|
|
if (!initial && (error == 0))
|
|
{
|
|
memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
|
|
}
|
|
else
|
|
{
|
|
const guchar *src = info->src;
|
|
guchar *dest = info->dest;
|
|
|
|
for (x = info->x; x < xe; x++)
|
|
{
|
|
guint val = src[GRAY_PIX];
|
|
|
|
src += 1;
|
|
|
|
dest[0] = val;
|
|
dest[1] = val;
|
|
dest[2] = val;
|
|
dest += 3;
|
|
}
|
|
}
|
|
|
|
if (++y == ye)
|
|
break;
|
|
|
|
info->dest += info->dest_bpl;
|
|
|
|
if (error)
|
|
{
|
|
info->src_y += error;
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
initial = TRUE;
|
|
}
|
|
else
|
|
{
|
|
initial = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
render_image_gray_a (RenderInfo *info)
|
|
{
|
|
const guint *alpha = info->alpha;
|
|
gint y, ye;
|
|
gint x, xe;
|
|
gboolean initial = TRUE;
|
|
|
|
y = info->y;
|
|
ye = info->y + info->h;
|
|
xe = info->x + info->w;
|
|
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error =
|
|
RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
|
|
|
|
if (!initial && (error == 0) && (y & check_mod))
|
|
{
|
|
memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
|
|
}
|
|
else
|
|
{
|
|
const guchar *src = info->src;
|
|
guchar *dest = info->dest;
|
|
guint dark_light;
|
|
|
|
dark_light = (y >> check_shift) + (info->x >> check_shift);
|
|
|
|
for (x = info->x; x < xe; x++)
|
|
{
|
|
guint a = alpha[src[ALPHA_G_PIX]];
|
|
guint val;
|
|
|
|
if (dark_light & 0x1)
|
|
val = gimp_render_blend_dark_check[(a | src[GRAY_PIX])];
|
|
else
|
|
val = gimp_render_blend_light_check[(a | src[GRAY_PIX])];
|
|
|
|
src += 2;
|
|
|
|
dest[0] = val;
|
|
dest[1] = val;
|
|
dest[2] = val;
|
|
dest += 3;
|
|
|
|
if (((x + 1) & check_mod) == 0)
|
|
dark_light += 1;
|
|
}
|
|
}
|
|
|
|
if (++y == ye)
|
|
break;
|
|
|
|
info->dest += info->dest_bpl;
|
|
|
|
if (error)
|
|
{
|
|
info->src_y += error;
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
initial = TRUE;
|
|
}
|
|
else
|
|
{
|
|
initial = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
render_image_rgb (RenderInfo *info)
|
|
{
|
|
gint y, ye;
|
|
gint xe;
|
|
gboolean initial = TRUE;
|
|
|
|
y = info->y;
|
|
ye = info->y + info->h;
|
|
xe = info->x + info->w;
|
|
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error =
|
|
RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
|
|
|
|
if (!initial && (error == 0))
|
|
{
|
|
memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
|
|
}
|
|
else
|
|
{
|
|
memcpy (info->dest, info->src, 3 * info->w);
|
|
}
|
|
|
|
if (++y == ye)
|
|
break;
|
|
|
|
info->dest += info->dest_bpl;
|
|
|
|
if (error)
|
|
{
|
|
info->src_y += error;
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
initial = TRUE;
|
|
}
|
|
else
|
|
{
|
|
initial = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
render_image_rgb_a (RenderInfo *info)
|
|
{
|
|
const guint *alpha = info->alpha;
|
|
gint y, ye;
|
|
gint x, xe;
|
|
gint initial = TRUE;
|
|
|
|
y = info->y;
|
|
ye = info->y + info->h;
|
|
xe = info->x + info->w;
|
|
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error =
|
|
RINT (floor ((y + 1) / info->scaley) - floor (y / info->scaley));
|
|
|
|
if (!initial && (error == 0) && (y & check_mod))
|
|
{
|
|
memcpy (info->dest, info->dest - info->dest_bpl, info->dest_width);
|
|
}
|
|
else
|
|
{
|
|
const guchar *src = info->src;
|
|
guchar *dest = info->dest;
|
|
guint dark_light;
|
|
|
|
dark_light = (y >> check_shift) + (info->x >> check_shift);
|
|
|
|
for (x = info->x; x < xe; x++)
|
|
{
|
|
guint r, g, b, a = alpha[src[ALPHA_PIX]];
|
|
|
|
if (dark_light & 0x1)
|
|
{
|
|
r = gimp_render_blend_dark_check[(a | src[RED_PIX])];
|
|
g = gimp_render_blend_dark_check[(a | src[GREEN_PIX])];
|
|
b = gimp_render_blend_dark_check[(a | src[BLUE_PIX])];
|
|
}
|
|
else
|
|
{
|
|
r = gimp_render_blend_light_check[(a | src[RED_PIX])];
|
|
g = gimp_render_blend_light_check[(a | src[GREEN_PIX])];
|
|
b = gimp_render_blend_light_check[(a | src[BLUE_PIX])];
|
|
}
|
|
|
|
src += 4;
|
|
|
|
dest[0] = r;
|
|
dest[1] = g;
|
|
dest[2] = b;
|
|
dest += 3;
|
|
|
|
if (((x + 1) & check_mod) == 0)
|
|
dark_light += 1;
|
|
}
|
|
}
|
|
|
|
if (++y == ye)
|
|
break;
|
|
|
|
info->dest += info->dest_bpl;
|
|
|
|
if (error)
|
|
{
|
|
info->src_y += error;
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
initial = TRUE;
|
|
}
|
|
else
|
|
{
|
|
initial = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
render_image_init_info_full (RenderInfo *info,
|
|
GimpDisplayShell *shell,
|
|
gint x,
|
|
gint y,
|
|
gint w,
|
|
gint h,
|
|
GimpProjection *projection)
|
|
{
|
|
info->shell = shell;
|
|
info->w = w;
|
|
info->h = h;
|
|
info->scalex = SCALEFACTOR_X (shell);
|
|
info->scaley = SCALEFACTOR_Y (shell);
|
|
info->dest_bpp = 3;
|
|
info->dest_bpl = info->dest_bpp * GIMP_RENDER_BUF_WIDTH;
|
|
info->dest_width = info->dest_bpp * info->w;
|
|
|
|
render_image_init_info (info, shell, x, y,
|
|
gimp_projection_get_tiles (projection));
|
|
|
|
info->scale = render_image_accelerate_scaling (w, info->x, info->scalex);
|
|
|
|
if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_projection_get_image_type (projection)))
|
|
{
|
|
gdouble opacity = gimp_projection_get_opacity (projection);
|
|
|
|
info->alpha = render_image_init_alpha (opacity * 255.999);
|
|
}
|
|
}
|
|
|
|
static void
|
|
render_image_init_info (RenderInfo *info,
|
|
GimpDisplayShell *shell,
|
|
gint x,
|
|
gint y,
|
|
TileManager *tiles)
|
|
{
|
|
info->src_tiles = tiles;
|
|
info->x = x + shell->offset_x;
|
|
info->y = y + shell->offset_y;
|
|
info->src_x = (gdouble) info->x / info->scalex;
|
|
info->src_y = (gdouble) info->y / info->scaley;
|
|
info->dest = shell->render_buf;
|
|
}
|
|
|
|
static guint *
|
|
render_image_init_alpha (gint mult)
|
|
{
|
|
static guint *alpha_mult = NULL;
|
|
static gint alpha_val = -1;
|
|
|
|
gint i;
|
|
|
|
if (alpha_val != mult)
|
|
{
|
|
if (!alpha_mult)
|
|
alpha_mult = g_new (guint, 256);
|
|
|
|
alpha_val = mult;
|
|
for (i = 0; i < 256; i++)
|
|
alpha_mult[i] = ((mult * i) / 255) << 8;
|
|
}
|
|
|
|
return alpha_mult;
|
|
}
|
|
|
|
static guchar *
|
|
render_image_accelerate_scaling (gint width,
|
|
gint start,
|
|
gdouble scalex)
|
|
{
|
|
static guchar *scale = NULL;
|
|
|
|
gint i;
|
|
|
|
if (! scale)
|
|
scale = g_new (guchar, GIMP_RENDER_BUF_WIDTH + 1);
|
|
|
|
for (i = 0; i <= width; i++)
|
|
{
|
|
scale[i] = RINT (floor ((start + 1) / scalex) - floor (start / scalex));
|
|
start++;
|
|
}
|
|
|
|
return scale;
|
|
}
|
|
|
|
static guchar *
|
|
render_image_tile_fault (RenderInfo *info)
|
|
{
|
|
Tile *tile;
|
|
const guchar *src;
|
|
const guchar *scale;
|
|
guchar *dest;
|
|
gint width;
|
|
gint tilex;
|
|
gint step;
|
|
gint bpp;
|
|
gint x;
|
|
|
|
tile = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x, info->src_y, TRUE, FALSE);
|
|
|
|
g_return_val_if_fail (tile != NULL, tile_buf);
|
|
|
|
src = tile_data_pointer (tile,
|
|
info->src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
|
|
bpp = tile_manager_bpp (info->src_tiles);
|
|
scale = info->scale;
|
|
dest = tile_buf;
|
|
|
|
x = info->src_x;
|
|
width = info->w;
|
|
|
|
tilex = info->src_x / TILE_WIDTH;
|
|
|
|
do
|
|
{
|
|
const guchar *s = src;
|
|
|
|
switch (bpp)
|
|
{
|
|
case 4:
|
|
*dest++ = *s++;
|
|
case 3:
|
|
*dest++ = *s++;
|
|
case 2:
|
|
*dest++ = *s++;
|
|
case 1:
|
|
*dest++ = *s++;
|
|
}
|
|
|
|
step = *scale++;
|
|
|
|
if (step)
|
|
{
|
|
x += step;
|
|
src += step * bpp;
|
|
|
|
if ((x >> tile_shift) != tilex)
|
|
{
|
|
tile_release (tile, FALSE);
|
|
tilex += 1;
|
|
|
|
tile = tile_manager_get_tile (info->src_tiles,
|
|
x, info->src_y, TRUE, FALSE);
|
|
if (!tile)
|
|
return tile_buf;
|
|
|
|
src = tile_data_pointer (tile,
|
|
x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
}
|
|
}
|
|
}
|
|
while (--width);
|
|
|
|
tile_release (tile, FALSE);
|
|
|
|
return tile_buf;
|
|
}
|