cfd90e3851
* app/display/gimpdisplayshell-render.c: added a bilinear filtering like weighting of neighbourhood pixels for approximating the downsampling from the next larger level in the projection mipmap. Also some general code cleanup. svn path=/trunk/; revision=23278
1552 lines
42 KiB
C
1552 lines
42 KiB
C
/* GIMP - The GNU 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 "libgimpmath/gimpmath.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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const guint *alpha;
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const 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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gint xstart;
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gint xdelta;
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gint yfraction;
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};
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static void gimp_display_shell_render_info_scale (RenderInfo *info,
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GimpDisplayShell *shell,
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TileManager *src_tiles,
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gdouble scale_x,
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gdouble scale_y);
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static void gimp_display_shell_render_setup_notify (GObject *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 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_return_if_fail (tile_buf == NULL);
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g_signal_connect (gimp->config, "notify::transparency-size",
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G_CALLBACK (gimp_display_shell_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 (gimp_display_shell_render_setup_notify),
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gimp);
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/* allocate a buffer for arranging information from a row of tiles */
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tile_buf = g_new (guchar, GIMP_RENDER_BUF_WIDTH * MAX_CHANNELS);
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gimp_display_shell_render_setup_notify (G_OBJECT (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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gimp_display_shell_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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gimp_display_shell_render_setup_notify (GObject *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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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 const guint * render_image_init_alpha (gint mult);
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static const 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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/* Initialize RenderInfo with values that don't change during the
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* call of this function.
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*/
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info.shell = shell;
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info.x = x + shell->offset_x;
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info.y = y + shell->offset_y;
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info.w = w;
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info.h = h;
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info.dest_bpp = 3;
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info.dest_bpl = info.dest_bpp * GIMP_RENDER_BUF_WIDTH;
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info.dest_width = info.dest_bpp * info.w;
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if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_projection_get_image_type (projection)))
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{
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gdouble opacity = gimp_projection_get_opacity (projection);
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info.alpha = render_image_init_alpha (opacity * 255.999);
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}
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/* Setup RenderInfo for rendering a GimpProjection level. */
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{
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TileManager *src_tiles;
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gint level;
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level = gimp_projection_get_level (projection,
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shell->scale_x,
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shell->scale_y);
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src_tiles = gimp_projection_get_tiles_at_level (projection, level);
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gimp_display_shell_render_info_scale (&info,
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shell,
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src_tiles,
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shell->scale_x * (1 << level),
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shell->scale_y * (1 << level));
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}
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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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type = gimp_projection_get_image_type (projection);
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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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TileManager *src_tiles = gimp_drawable_get_tiles (shell->mask);
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/* The mask does not (yet) have an image pyramid, use the base scale of
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* the shell.
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*/
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gimp_display_shell_render_info_scale (&info,
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shell,
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src_tiles,
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shell->scale_x,
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shell->scale_y);
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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->yfraction = 256 * fmod (y/info->scaley, 1.0);
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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 = 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->yfraction = 256 * fmod (y/info->scaley, 1.0);
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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->yfraction = 256 * fmod (y/info->scaley, 1.0);
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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 = 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->yfraction = 256 * fmod (y/info->scaley, 1.0);
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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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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->yfraction = 256 * fmod (y/info->scaley, 1.0);
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info->src = render_image_tile_fault (info);
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|
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while (TRUE)
|
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{
|
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gint error = floor ((y + 1) / info->scaley) - floor (y / info->scaley);
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|
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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);
|
|
|
|
for (x = info->x; x < xe; x++)
|
|
{
|
|
guint r, g, b, a = alpha[src[ALPHA_I_PIX]];
|
|
guint val = src[INDEXED_PIX] * 3;
|
|
|
|
src += 2;
|
|
|
|
if (dark_light & 0x1)
|
|
{
|
|
r = gimp_render_blend_dark_check[(a | cmap[val + 0])];
|
|
g = gimp_render_blend_dark_check[(a | cmap[val + 1])];
|
|
b = gimp_render_blend_dark_check[(a | cmap[val + 2])];
|
|
}
|
|
else
|
|
{
|
|
r = gimp_render_blend_light_check[(a | cmap[val + 0])];
|
|
g = gimp_render_blend_light_check[(a | cmap[val + 1])];
|
|
b = gimp_render_blend_light_check[(a | cmap[val + 2])];
|
|
}
|
|
|
|
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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
initial = TRUE;
|
|
}
|
|
else
|
|
{
|
|
initial = FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error = 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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error = 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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error = 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->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
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;
|
|
|
|
y = info->y;
|
|
ye = info->y + info->h;
|
|
xe = info->x + info->w;
|
|
|
|
info->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src = render_image_tile_fault (info);
|
|
|
|
while (TRUE)
|
|
{
|
|
gint error = floor ((y + 1) / info->scaley) - floor (y / info->scaley);
|
|
|
|
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;
|
|
|
|
info->yfraction = 256 * fmod (y/info->scaley, 1.0);
|
|
info->src_y += error;
|
|
info->src = render_image_tile_fault (info);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gimp_display_shell_render_info_scale (RenderInfo *info,
|
|
GimpDisplayShell *shell,
|
|
TileManager *src_tiles,
|
|
gdouble scale_x,
|
|
gdouble scale_y)
|
|
{
|
|
info->src_tiles = src_tiles;
|
|
|
|
/* We must reset info->dest because this member is modified in render
|
|
* functions.
|
|
*/
|
|
info->dest = shell->render_buf;
|
|
|
|
info->scalex = scale_x;
|
|
info->scaley = scale_y;
|
|
|
|
info->src_x = (gdouble) info->x / info->scalex;
|
|
info->src_y = (gdouble) info->y / info->scaley;
|
|
|
|
info->xstart = (info->src_x +
|
|
((info->x / info->scalex) -
|
|
floor (info->x / info->scalex))) * 65536.0;
|
|
|
|
info->xdelta = (1 << 16) * (1.0 / info->scalex);
|
|
}
|
|
|
|
static const 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 inline void
|
|
mix_pixels (gint dx,
|
|
gint dy,
|
|
const guchar *src0,
|
|
const guchar *src1,
|
|
const guchar *src2,
|
|
const guchar *src3,
|
|
guchar *dst,
|
|
gint components)
|
|
{
|
|
/* FIXME: make sure this is dealing correctly with the alpha */
|
|
#define DO_COMPONENT(iter) \
|
|
{ \
|
|
gint m0, m1; \
|
|
m0 = ((256 - dx) * src0[iter] + dx * src1[iter]) >> 8; \
|
|
m1 = ((256 - dx) * src2[iter] + dx * src3[iter]) >> 8; \
|
|
dst[iter] = (((256 - dy) * m0 + dy * m1)) >> 8; \
|
|
}
|
|
|
|
/* Adjust the weights of the bilinear mixing in favour of the least important
|
|
* neighbours, this will both slightly blur the result as well as make sure
|
|
* that we rather display than throw away information from the original
|
|
* source data.
|
|
*/
|
|
dx = (dx-128) * 0.50 + 128;
|
|
dy = (dy-128) * 0.50 + 128;
|
|
|
|
switch (components)
|
|
{
|
|
gint i;
|
|
case 4:
|
|
#define ALPHA 3
|
|
DO_COMPONENT(ALPHA);
|
|
if (dst[ALPHA])
|
|
{
|
|
for (i= 0; i < ALPHA; i++)
|
|
{
|
|
gint m0 = ((256-dx) * src0[i] * src0[ALPHA] + dx * src1[i] * src1[ALPHA]) >> 8;
|
|
gint m1 = ((256-dx) * src2[i] * src2[ALPHA] + dx * src3[i] * src3[ALPHA]) >> 8;
|
|
gint r = (((256-dy) * m0 + dy * m1)/dst[ALPHA]) >> 8;
|
|
|
|
if (r<0)
|
|
dst[i]=0;
|
|
else if (r>255)
|
|
dst[i]=255;
|
|
else
|
|
dst[i]=r;
|
|
}
|
|
}
|
|
#undef ALPHA
|
|
break;
|
|
case 3:
|
|
DO_COMPONENT (0);
|
|
DO_COMPONENT (1);
|
|
DO_COMPONENT (2);
|
|
break;
|
|
case 2:
|
|
#define ALPHA 1
|
|
DO_COMPONENT(ALPHA);
|
|
if (dst[ALPHA])
|
|
{
|
|
for (i= 0; i < ALPHA; i++)
|
|
{
|
|
gint m0 = ((256-dx) * src0[i] * src0[ALPHA] + dx * src1[i] * src1[ALPHA]) >> 8;
|
|
gint m1 = ((256-dx) * src2[i] * src2[ALPHA] + dx * src3[i] * src3[ALPHA]) >> 8;
|
|
gint r = (((256-dy) * m0 + dy * m1)/dst[ALPHA]) >> 8;
|
|
|
|
if (r<0)
|
|
dst[i]=0;
|
|
else if (r>255)
|
|
dst[i]=255;
|
|
else
|
|
dst[i]=r;
|
|
}
|
|
}
|
|
#undef ALPHA
|
|
break;
|
|
case 1:
|
|
DO_COMPONENT (0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* this function results in the correct data residing where dest points, if
|
|
* scale_x and|or scale_y have a scale factor >100% the respective dimension
|
|
* will use nearest neighbour instead of bilinear interpolation.
|
|
*/
|
|
static inline void
|
|
compute_sample (gdouble scale_x,
|
|
gdouble scale_y,
|
|
gint dx,
|
|
gint dy,
|
|
const guchar *src0,
|
|
const guchar *src1,
|
|
const guchar *src2,
|
|
const guchar *src3,
|
|
guchar *dest,
|
|
gint bpp)
|
|
{
|
|
if (scale_x < 1.0 &&
|
|
scale_y < 1.0)
|
|
{
|
|
mix_pixels (dx >> 8,
|
|
dy >> 8,
|
|
src0, src1,
|
|
src2, src3,
|
|
dest,
|
|
bpp);
|
|
dest += bpp;
|
|
}
|
|
else if (scale_x < 1.0 &&
|
|
scale_y >= 1.0)
|
|
{
|
|
mix_pixels (dx >> 8,
|
|
0,
|
|
src0, src1,
|
|
src2, src3,
|
|
dest,
|
|
bpp);
|
|
dest += bpp;
|
|
}
|
|
else if (scale_x >= 1.0 &&
|
|
scale_y < 1.0)
|
|
{
|
|
mix_pixels (0,
|
|
dy >> 8,
|
|
src0, src1,
|
|
src2, src3,
|
|
dest,
|
|
bpp);
|
|
dest += bpp;
|
|
}
|
|
else
|
|
{
|
|
const guchar *s = src0;
|
|
|
|
switch (bpp)
|
|
{
|
|
case 4:
|
|
*dest++ = *s++;
|
|
case 3:
|
|
*dest++ = *s++;
|
|
case 2:
|
|
*dest++ = *s++;
|
|
case 1:
|
|
*dest++ = *s++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* fast paths */
|
|
static const guchar * render_image_tile_fault_one_row (RenderInfo *info);
|
|
static const guchar * render_image_tile_fault_nearest (RenderInfo *info);
|
|
|
|
|
|
/* function to render a horizontal line of view data */
|
|
static const guchar *
|
|
render_image_tile_fault (RenderInfo *info)
|
|
{
|
|
Tile *tile0;
|
|
Tile *tile1;
|
|
Tile *tile2;
|
|
Tile *tile3;
|
|
|
|
const guchar *src0;
|
|
const guchar *src1;
|
|
const guchar *src2;
|
|
const guchar *src3;
|
|
|
|
guchar *dest;
|
|
gint width;
|
|
gint tilex0; /* the current x-tile indice used for the left
|
|
sample pair*/
|
|
gint tilex1; /* the current x-tile indice used for the right
|
|
sample pair */
|
|
gint xdelta; /* fixed point amount to increment source x
|
|
coordinas for each horizontal integer destination
|
|
pixel increment */
|
|
gint bpp;
|
|
glong x;
|
|
|
|
|
|
/* dispatch to fast path functions on special conditions */
|
|
if ((info->scalex == 1.0 &&
|
|
info->scaley == 1.0) ||
|
|
(info->shell->scale_x > 1.0 &&
|
|
info->shell->scale_y > 1.0))
|
|
{
|
|
/* use nearest neighbour interpolation when the desired scale
|
|
* is 1:1 with the available pyramid.
|
|
*/
|
|
return render_image_tile_fault_nearest (info);
|
|
}
|
|
else if (((info->src_y) & ~(TILE_WIDTH -1)) ==
|
|
((info->src_y + 1) & ~(TILE_WIDTH -1)))
|
|
{
|
|
/* all the tiles needed are in a single row */
|
|
return render_image_tile_fault_one_row (info);
|
|
}
|
|
|
|
tile0 = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x, info->src_y, TRUE, FALSE);
|
|
tile2 = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x, info->src_y+1, TRUE, FALSE);
|
|
tile1 = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x+1, info->src_y, TRUE, FALSE);
|
|
tile3 = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x+1, info->src_y+1, TRUE, FALSE);
|
|
|
|
g_return_val_if_fail (tile0 != NULL, tile_buf);
|
|
|
|
src0 = tile_data_pointer (tile0,
|
|
info->src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
if (tile1)
|
|
{
|
|
src1 = tile_data_pointer (tile1,
|
|
(info->src_x + 1)% TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
src1 = src0; /* reusing existing pixel data */
|
|
}
|
|
|
|
if (tile2)
|
|
{
|
|
src2 = tile_data_pointer (tile2,
|
|
info->src_x % TILE_WIDTH,
|
|
(info->src_y + 1) % TILE_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
src2 = src0; /* reusing existing pixel data */
|
|
}
|
|
|
|
if (tile3)
|
|
{
|
|
src3 = tile_data_pointer (tile3,
|
|
(info->src_x + 1) % TILE_WIDTH,
|
|
(info->src_y + 1) % TILE_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
src3 = src1; /* reusing existing pixel data */
|
|
}
|
|
|
|
bpp = tile_manager_bpp (info->src_tiles);
|
|
dest = tile_buf;
|
|
|
|
x = info->xstart;
|
|
|
|
width = info->w;
|
|
|
|
tilex0 = info->src_x / TILE_WIDTH;
|
|
tilex1 = (info->src_x + 1) / TILE_WIDTH;
|
|
|
|
xdelta = info->xdelta;
|
|
|
|
do
|
|
{
|
|
gint src_x = x >> 16;
|
|
gint skipped;
|
|
|
|
compute_sample (info->shell->scale_x,
|
|
info->shell->scale_y,
|
|
(x >> 8) & 0xff,
|
|
info->yfraction,
|
|
src0, src1,
|
|
src2, src3,
|
|
dest,
|
|
bpp);
|
|
dest += bpp;
|
|
|
|
x += xdelta;
|
|
|
|
skipped = (x >> 16) - src_x;
|
|
|
|
if (skipped)
|
|
{
|
|
/* if we changed integer source pixel coordinates in the source
|
|
* buffer, make sure the src pointers (and their backing tiles) are
|
|
* correct
|
|
*/
|
|
src0 += skipped * bpp;
|
|
src1 += skipped * bpp;
|
|
src2 += skipped * bpp;
|
|
src3 += skipped * bpp;
|
|
|
|
src_x += skipped;
|
|
|
|
if ((src_x / TILE_WIDTH) != tilex0)
|
|
{
|
|
tile_release (tile0, FALSE);
|
|
|
|
if (tile2)
|
|
tile_release (tile2, FALSE);
|
|
|
|
tilex0 += 1;
|
|
|
|
tile0 = tile_manager_get_tile (info->src_tiles,
|
|
src_x, info->src_y, TRUE, FALSE);
|
|
tile2 = tile_manager_get_tile (info->src_tiles,
|
|
src_x, info->src_y+1, TRUE, FALSE);
|
|
if (!tile0)
|
|
goto done;
|
|
|
|
if (!tile2)
|
|
goto done;
|
|
|
|
src0 = tile_data_pointer (tile0,
|
|
src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src2 = tile_data_pointer (tile2,
|
|
src_x % TILE_WIDTH,
|
|
(info->src_y + 1)% TILE_HEIGHT);
|
|
}
|
|
|
|
if (((src_x+1) / TILE_WIDTH) != tilex1)
|
|
{
|
|
if (tile1)
|
|
tile_release (tile1, FALSE);
|
|
|
|
if (tile3)
|
|
tile_release (tile3, FALSE);
|
|
|
|
tilex1 += 1;
|
|
|
|
tile1 = tile_manager_get_tile (info->src_tiles,
|
|
src_x + 1, info->src_y,
|
|
TRUE, FALSE);
|
|
tile3 = tile_manager_get_tile (info->src_tiles,
|
|
src_x + 1, info->src_y + 1,
|
|
TRUE, FALSE);
|
|
|
|
if (!tile1)
|
|
{
|
|
src1 = src0;
|
|
}
|
|
else
|
|
{
|
|
src1 = tile_data_pointer (tile1,
|
|
(src_x + 1) % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
}
|
|
|
|
if (!tile3)
|
|
{
|
|
src3 = src2;
|
|
}
|
|
else
|
|
{
|
|
src3 = tile_data_pointer (tile3,
|
|
(src_x + 1) % TILE_WIDTH,
|
|
(info->src_y+1) % TILE_HEIGHT);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
while (--width);
|
|
|
|
done:
|
|
if (tile0)
|
|
tile_release (tile0, FALSE);
|
|
|
|
if (tile2)
|
|
tile_release (tile2, FALSE);
|
|
|
|
if (tile1)
|
|
tile_release (tile1, FALSE);
|
|
|
|
if (tile3)
|
|
tile_release (tile3, FALSE);
|
|
|
|
return tile_buf;
|
|
}
|
|
|
|
/* function to render a horizontal line of view data */
|
|
static const guchar *
|
|
render_image_tile_fault_nearest (RenderInfo *info)
|
|
{
|
|
Tile *tile;
|
|
const guchar *src;
|
|
guchar *dest;
|
|
gint width;
|
|
gint tilex;
|
|
gint xdelta;
|
|
gint bpp;
|
|
glong 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);
|
|
dest = tile_buf;
|
|
|
|
x = info->xstart;
|
|
|
|
|
|
width = info->w;
|
|
|
|
tilex = info->src_x / TILE_WIDTH;
|
|
|
|
xdelta = info->xdelta;
|
|
|
|
do
|
|
{
|
|
const guchar *s = src;
|
|
gint src_x = x >> 16;
|
|
gint skipped;
|
|
|
|
switch (bpp)
|
|
{
|
|
case 4:
|
|
*dest++ = *s++;
|
|
case 3:
|
|
*dest++ = *s++;
|
|
case 2:
|
|
*dest++ = *s++;
|
|
case 1:
|
|
*dest++ = *s++;
|
|
}
|
|
|
|
x += xdelta;
|
|
skipped = (x >> 16) - src_x;
|
|
if (skipped)
|
|
{
|
|
src += skipped * bpp;
|
|
src_x += skipped;
|
|
|
|
if ((src_x / TILE_WIDTH) != tilex)
|
|
{
|
|
tile_release (tile, FALSE);
|
|
tilex += 1;
|
|
|
|
tile = tile_manager_get_tile (info->src_tiles,
|
|
src_x, info->src_y, TRUE, FALSE);
|
|
if (!tile)
|
|
return tile_buf;
|
|
|
|
src = tile_data_pointer (tile,
|
|
src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
}
|
|
}
|
|
}
|
|
while (--width);
|
|
|
|
tile_release (tile, FALSE);
|
|
|
|
return tile_buf;
|
|
}
|
|
|
|
|
|
/* optimized renderer for a line of view data that assumes source data
|
|
* to lie in the same row of tiles.
|
|
*/
|
|
static const guchar *
|
|
render_image_tile_fault_one_row (RenderInfo *info)
|
|
{
|
|
Tile *current_tile;
|
|
Tile *next_tile=NULL; /* only used when crossing over right edge
|
|
of tiles */
|
|
const guchar *src0;
|
|
const guchar *src1;
|
|
const guchar *src2;
|
|
const guchar *src3;
|
|
guchar *dest;
|
|
gint width;
|
|
gint tilex0;
|
|
gint tilex1;
|
|
gint xdelta;
|
|
gint bpp;
|
|
glong x;
|
|
|
|
current_tile = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x, info->src_y, TRUE, FALSE);
|
|
|
|
g_return_val_if_fail (current_tile != NULL, tile_buf);
|
|
|
|
|
|
src0 = tile_data_pointer (current_tile,
|
|
info->src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src2 = tile_data_pointer (current_tile,
|
|
info->src_x % TILE_WIDTH,
|
|
(info->src_y + 1) % TILE_HEIGHT);
|
|
|
|
if ((info->src_x & ~(TILE_WIDTH -1)) !=
|
|
((info->src_x + 1) & ~(TILE_WIDTH -1))) /* need two tiles */
|
|
{
|
|
next_tile = tile_manager_get_tile (info->src_tiles,
|
|
info->src_x+1, info->src_y,
|
|
TRUE, FALSE);
|
|
}
|
|
|
|
if (next_tile != NULL)
|
|
{
|
|
src1 = tile_data_pointer (next_tile,
|
|
(info->src_x + 1)% TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src3 = tile_data_pointer (next_tile,
|
|
(info->src_x + 1) % TILE_WIDTH,
|
|
(info->src_y + 1) % TILE_HEIGHT);
|
|
}
|
|
else if (((info->src_x & ~(TILE_WIDTH -1)) ==
|
|
((info->src_x + 1) & ~(TILE_WIDTH -1))))
|
|
/* the common case get all data from the same tile */
|
|
{
|
|
src1 = tile_data_pointer (current_tile,
|
|
(info->src_x + 1)% TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src3 = tile_data_pointer (current_tile,
|
|
(info->src_x + 1) % TILE_WIDTH,
|
|
(info->src_y + 1) % TILE_HEIGHT);
|
|
}
|
|
else
|
|
{
|
|
/* we should have gotten the rightmost pair of samples from a
|
|
* separate tile that we couldn't retrieve
|
|
*/
|
|
src1 = src0;
|
|
src3 = src2;
|
|
}
|
|
|
|
bpp = tile_manager_bpp (info->src_tiles);
|
|
dest = tile_buf;
|
|
|
|
x = info->xstart;
|
|
|
|
width = info->w;
|
|
|
|
tilex0= info->src_x / TILE_WIDTH;
|
|
tilex1= (info->src_x+1)/ TILE_WIDTH;
|
|
|
|
xdelta = info->xdelta;
|
|
|
|
do
|
|
{
|
|
gint src_x = x >> 16;
|
|
gint skipped;
|
|
|
|
compute_sample (info->shell->scale_x,
|
|
info->shell->scale_y,
|
|
(x >> 8) & 0xff,
|
|
info->yfraction,
|
|
src0, src1,
|
|
src2, src3,
|
|
dest,
|
|
bpp);
|
|
dest += bpp;
|
|
|
|
if (next_tile) /* we should only need two tiles for one of
|
|
the rounds when generating data
|
|
*/
|
|
{
|
|
tile_release (next_tile, FALSE);
|
|
next_tile = NULL;
|
|
}
|
|
|
|
x += xdelta;
|
|
|
|
skipped = (x >> 16) - src_x;
|
|
|
|
if (skipped)
|
|
{
|
|
src0 += skipped * bpp;
|
|
src1 += skipped * bpp;
|
|
src2 += skipped * bpp;
|
|
src3 += skipped * bpp;
|
|
|
|
src_x += skipped;
|
|
|
|
/* check if src0 or src2 was pushed out of the
|
|
* current tile
|
|
*/
|
|
if ((src_x / TILE_WIDTH) != tilex0)
|
|
{
|
|
tile_release (current_tile, FALSE);
|
|
tilex0 += 1;
|
|
|
|
if (next_tile)
|
|
{ /* reuse tile1 fetched for src0 and src2 if available */
|
|
current_tile=next_tile;
|
|
next_tile=NULL;
|
|
}
|
|
else
|
|
{
|
|
current_tile = tile_manager_get_tile (info->src_tiles,
|
|
src_x, info->src_y,
|
|
TRUE, FALSE);
|
|
}
|
|
|
|
if (!current_tile)
|
|
goto done;
|
|
|
|
src0 = tile_data_pointer (current_tile,
|
|
src_x % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src2 = tile_data_pointer (current_tile,
|
|
src_x % TILE_WIDTH,
|
|
(info->src_y + 1)% TILE_HEIGHT);
|
|
}
|
|
|
|
if (((src_x+1) / TILE_WIDTH) != tilex1)
|
|
{
|
|
if (next_tile)
|
|
tile_release (next_tile, FALSE);
|
|
|
|
tilex1 += 1;
|
|
|
|
next_tile = tile_manager_get_tile (info->src_tiles,
|
|
src_x + 1, info->src_y,
|
|
TRUE, FALSE);
|
|
if (!next_tile)
|
|
{ /* use the data pointers from src0 and src2 when
|
|
we're outside the defined region */
|
|
src1 = src0;
|
|
src3 = src2;
|
|
}
|
|
else
|
|
{
|
|
src1 = tile_data_pointer (next_tile,
|
|
(src_x + 1) % TILE_WIDTH,
|
|
info->src_y % TILE_HEIGHT);
|
|
src3 = tile_data_pointer (next_tile,
|
|
(src_x + 1) % TILE_WIDTH,
|
|
(info->src_y+1) % TILE_HEIGHT);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
while (--width);
|
|
|
|
done:
|
|
if (current_tile!=NULL)
|
|
tile_release (current_tile, FALSE);
|
|
|
|
if (next_tile!=NULL)
|
|
tile_release (next_tile, FALSE);
|
|
|
|
return tile_buf;
|
|
}
|