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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:30:19 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:30:19 +0000
commit5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch)
treecbffb45144febf451e54061db2b21395faf94bfe /app/display/gimpdisplayxfer.c
parentInitial commit. (diff)
downloadgimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz
gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'app/display/gimpdisplayxfer.c')
-rw-r--r--app/display/gimpdisplayxfer.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/app/display/gimpdisplayxfer.c b/app/display/gimpdisplayxfer.c
new file mode 100644
index 0000000..1dcd13c
--- /dev/null
+++ b/app/display/gimpdisplayxfer.c
@@ -0,0 +1,289 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "display-types.h"
+
+#include "gimpdisplayxfer.h"
+
+
+#define NUM_PAGES 2
+
+typedef struct _RTree RTree;
+typedef struct _RTreeNode RTreeNode;
+
+struct _RTreeNode
+{
+ RTreeNode *children[2];
+ RTreeNode *next;
+ gint x, y, w, h;
+};
+
+struct _RTree
+{
+ RTreeNode root;
+ RTreeNode *available;
+};
+
+struct _GimpDisplayXfer
+{
+ /* track subregions of render_surface for efficient uploads */
+ RTree rtree;
+ cairo_surface_t *render_surface[NUM_PAGES];
+ gint page;
+};
+
+
+gint GIMP_DISPLAY_RENDER_BUF_WIDTH = 256;
+gint GIMP_DISPLAY_RENDER_BUF_HEIGHT = 256;
+
+
+static RTreeNode *
+rtree_node_create (RTree *rtree,
+ RTreeNode **prev,
+ gint x,
+ gint y,
+ gint w,
+ gint h)
+{
+ RTreeNode *node;
+
+ gimp_assert (x >= 0 && x+w <= rtree->root.w);
+ gimp_assert (y >= 0 && y+h <= rtree->root.h);
+
+ if (w <= 0 || h <= 0)
+ return NULL;
+
+ node = g_slice_alloc (sizeof (*node));
+
+ node->children[0] = NULL;
+ node->children[1] = NULL;
+ node->x = x;
+ node->y = y;
+ node->w = w;
+ node->h = h;
+
+ node->next = *prev;
+ *prev = node;
+
+ return node;
+}
+
+static void
+rtree_node_destroy (RTree *rtree,
+ RTreeNode *node)
+{
+ gint i;
+
+ for (i = 0; i < 2; i++)
+ {
+ if (node->children[i])
+ rtree_node_destroy (rtree, node->children[i]);
+ }
+
+ g_slice_free (RTreeNode, node);
+}
+
+static RTreeNode *
+rtree_node_insert (RTree *rtree,
+ RTreeNode **prev,
+ RTreeNode *node,
+ gint w,
+ gint h)
+{
+ *prev = node->next;
+
+ if (((node->w - w) | (node->h - h)) > 1)
+ {
+ gint ww = node->w - w;
+ gint hh = node->h - h;
+
+ if (ww >= hh)
+ {
+ node->children[0] = rtree_node_create (rtree, prev,
+ node->x + w, node->y,
+ ww, node->h);
+ node->children[1] = rtree_node_create (rtree, prev,
+ node->x, node->y + h,
+ w, hh);
+ }
+ else
+ {
+ node->children[0] = rtree_node_create (rtree, prev,
+ node->x, node->y + h,
+ node->w, hh);
+ node->children[1] = rtree_node_create (rtree, prev,
+ node->x + w, node->y,
+ ww, h);
+ }
+ }
+
+ return node;
+}
+
+static RTreeNode *
+rtree_insert (RTree *rtree,
+ gint w,
+ gint h)
+{
+ RTreeNode *node, **prev;
+
+ for (prev = &rtree->available; (node = *prev); prev = &node->next)
+ if (node->w >= w && node->h >= h)
+ return rtree_node_insert (rtree, prev, node, w, h);
+
+ return NULL;
+}
+
+static void
+rtree_init (RTree *rtree,
+ gint w,
+ gint h)
+{
+ rtree->root.x = 0;
+ rtree->root.y = 0;
+ rtree->root.w = w;
+ rtree->root.h = h;
+ rtree->root.children[0] = NULL;
+ rtree->root.children[1] = NULL;
+ rtree->root.next = NULL;
+ rtree->available = &rtree->root;
+}
+
+static void
+rtree_reset (RTree *rtree)
+{
+ gint i;
+
+ for (i = 0; i < 2; i++)
+ {
+ if (rtree->root.children[i] == NULL)
+ continue;
+
+ rtree_node_destroy (rtree, rtree->root.children[i]);
+ rtree->root.children[i] = NULL;
+ }
+
+ rtree->root.next = NULL;
+ rtree->available = &rtree->root;
+}
+
+static void
+xfer_destroy (void *data)
+{
+ GimpDisplayXfer *xfer = data;
+ gint i;
+
+ for (i = 0; i < NUM_PAGES; i++)
+ cairo_surface_destroy (xfer->render_surface[i]);
+
+ rtree_reset (&xfer->rtree);
+ g_free (xfer);
+}
+
+GimpDisplayXfer *
+gimp_display_xfer_realize (GtkWidget *widget)
+{
+ GdkScreen *screen;
+ GimpDisplayXfer *xfer;
+ const gchar *env;
+
+ env = g_getenv ("GIMP_DISPLAY_RENDER_BUF_SIZE");
+ if (env)
+ {
+ gint width = atoi (env);
+ gint height = width;
+
+ env = strchr (env, 'x');
+ if (env)
+ height = atoi (env + 1);
+
+ if (width > 0 && width <= 8192 &&
+ height > 0 && height <= 8192)
+ {
+ GIMP_DISPLAY_RENDER_BUF_WIDTH = width;
+ GIMP_DISPLAY_RENDER_BUF_HEIGHT = height;
+ }
+ }
+
+ screen = gtk_widget_get_screen (widget);
+ xfer = g_object_get_data (G_OBJECT (screen), "gimp-display-xfer");
+
+ if (xfer == NULL)
+ {
+ cairo_t *cr;
+ gint w = GIMP_DISPLAY_RENDER_BUF_WIDTH;
+ gint h = GIMP_DISPLAY_RENDER_BUF_HEIGHT;
+ int n;
+
+ xfer = g_new (GimpDisplayXfer, 1);
+ rtree_init (&xfer->rtree, w, h);
+
+ cr = gdk_cairo_create (gtk_widget_get_window (widget));
+ for (n = 0; n < NUM_PAGES; n++)
+ {
+ xfer->render_surface[n] =
+ cairo_surface_create_similar_image (cairo_get_target (cr),
+ CAIRO_FORMAT_ARGB32, w, h);
+ cairo_surface_mark_dirty (xfer->render_surface[n]);
+ }
+ cairo_destroy (cr);
+ xfer->page = 0;
+
+ g_object_set_data_full (G_OBJECT (screen),
+ "gimp-display-xfer",
+ xfer, xfer_destroy);
+ }
+
+ return xfer;
+}
+
+cairo_surface_t *
+gimp_display_xfer_get_surface (GimpDisplayXfer *xfer,
+ gint w,
+ gint h,
+ gint *src_x,
+ gint *src_y)
+{
+ RTreeNode *node;
+
+ gimp_assert (w <= GIMP_DISPLAY_RENDER_BUF_WIDTH &&
+ h <= GIMP_DISPLAY_RENDER_BUF_HEIGHT);
+
+ node = rtree_insert (&xfer->rtree, w, h);
+ if (node == NULL)
+ {
+ xfer->page = (xfer->page + 1) % NUM_PAGES;
+ cairo_surface_flush (xfer->render_surface[xfer->page]);
+ rtree_reset (&xfer->rtree);
+ cairo_surface_mark_dirty (xfer->render_surface[xfer->page]); /* XXX */
+ node = rtree_insert (&xfer->rtree, w, h);
+ gimp_assert (node != NULL);
+ }
+
+ *src_x = node->x;
+ *src_y = node->y;
+
+ return xfer->render_surface[xfer->page];
+}