--- /dev/null
+/*
+ * Copyright 2012, Red Hat, Inc.
+ * Copyright 2012, Soren Sandmann
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Soren Sandmann <soren.sandmann@gmail.com>
+ */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <math.h>
+#include <gtk/gtk.h>
+#include <pixman.h>
+#include <stdlib.h>
+#include "gtk-utils.h"
+
+typedef struct
+{
+ GtkBuilder * builder;
+ pixman_image_t * original;
+ GtkAdjustment * scale_x_adjustment;
+ GtkAdjustment * scale_y_adjustment;
+ GtkAdjustment * rotate_adjustment;
+ GtkAdjustment * subsample_adjustment;
+ int scaled_width;
+ int scaled_height;
+} app_t;
+
+static GtkWidget *
+get_widget (app_t *app, const char *name)
+{
+ GtkWidget *widget = GTK_WIDGET (gtk_builder_get_object (app->builder, name));
+
+ if (!widget)
+ g_error ("Widget %s not found\n", name);
+
+ return widget;
+}
+
+static double
+min4 (double a, double b, double c, double d)
+{
+ double m1, m2;
+
+ m1 = MIN (a, b);
+ m2 = MIN (c, d);
+ return MIN (m1, m2);
+}
+
+static double
+max4 (double a, double b, double c, double d)
+{
+ double m1, m2;
+
+ m1 = MAX (a, b);
+ m2 = MAX (c, d);
+ return MAX (m1, m2);
+}
+
+static void
+compute_extents (pixman_f_transform_t *trans, double *sx, double *sy)
+{
+ double min_x, max_x, min_y, max_y;
+ pixman_f_vector_t v[4] =
+ {
+ { { 1, 1, 1 } },
+ { { -1, 1, 1 } },
+ { { -1, -1, 1 } },
+ { { 1, -1, 1 } },
+ };
+
+ pixman_f_transform_point (trans, &v[0]);
+ pixman_f_transform_point (trans, &v[1]);
+ pixman_f_transform_point (trans, &v[2]);
+ pixman_f_transform_point (trans, &v[3]);
+
+ min_x = min4 (v[0].v[0], v[1].v[0], v[2].v[0], v[3].v[0]);
+ max_x = max4 (v[0].v[0], v[1].v[0], v[2].v[0], v[3].v[0]);
+ min_y = min4 (v[0].v[1], v[1].v[1], v[2].v[1], v[3].v[1]);
+ max_y = max4 (v[0].v[1], v[1].v[1], v[2].v[1], v[3].v[1]);
+
+ *sx = (max_x - min_x) / 2.0;
+ *sy = (max_y - min_y) / 2.0;
+}
+
+typedef struct
+{
+ char name [20];
+ int value;
+} named_int_t;
+
+static const named_int_t filters[] =
+{
+ { "Box", PIXMAN_KERNEL_BOX },
+ { "Impulse", PIXMAN_KERNEL_IMPULSE },
+ { "Linear", PIXMAN_KERNEL_LINEAR },
+ { "Cubic", PIXMAN_KERNEL_CUBIC },
+ { "Lanczos2", PIXMAN_KERNEL_LANCZOS2 },
+ { "Lanczos3", PIXMAN_KERNEL_LANCZOS3 },
+ { "Lanczos3 Stretched", PIXMAN_KERNEL_LANCZOS3_STRETCHED },
+ { "Gaussian", PIXMAN_KERNEL_GAUSSIAN },
+};
+
+static const named_int_t repeats[] =
+{
+ { "None", PIXMAN_REPEAT_NONE },
+ { "Normal", PIXMAN_REPEAT_NORMAL },
+ { "Reflect", PIXMAN_REPEAT_REFLECT },
+ { "Pad", PIXMAN_REPEAT_PAD },
+};
+
+static int
+get_value (app_t *app, const named_int_t table[], const char *box_name)
+{
+ GtkComboBox *box = GTK_COMBO_BOX (get_widget (app, box_name));
+
+ return table[gtk_combo_box_get_active (box)].value;
+}
+
+static void
+copy_to_counterpart (app_t *app, GObject *object)
+{
+ static const char *xy_map[] =
+ {
+ "reconstruct_x_combo_box", "reconstruct_y_combo_box",
+ "sample_x_combo_box", "sample_y_combo_box",
+ "scale_x_adjustment", "scale_y_adjustment",
+ };
+ GObject *counterpart = NULL;
+ int i;
+
+ for (i = 0; i < G_N_ELEMENTS (xy_map); i += 2)
+ {
+ GObject *x = gtk_builder_get_object (app->builder, xy_map[i]);
+ GObject *y = gtk_builder_get_object (app->builder, xy_map[i + 1]);
+
+ if (object == x)
+ counterpart = y;
+ if (object == y)
+ counterpart = x;
+ }
+
+ if (!counterpart)
+ return;
+
+ if (GTK_IS_COMBO_BOX (counterpart))
+ {
+ gtk_combo_box_set_active (
+ GTK_COMBO_BOX (counterpart),
+ gtk_combo_box_get_active (
+ GTK_COMBO_BOX (object)));
+ }
+ else if (GTK_IS_ADJUSTMENT (counterpart))
+ {
+ gtk_adjustment_set_value (
+ GTK_ADJUSTMENT (counterpart),
+ gtk_adjustment_get_value (
+ GTK_ADJUSTMENT (object)));
+ }
+}
+
+static double
+to_scale (double v)
+{
+ return pow (1.15, v);
+}
+
+static void
+rescale (GtkWidget *may_be_null, app_t *app)
+{
+ pixman_f_transform_t ftransform;
+ pixman_transform_t transform;
+ double new_width, new_height;
+ double fscale_x, fscale_y;
+ double rotation;
+ pixman_fixed_t *params;
+ int n_params;
+ double sx, sy;
+
+ pixman_f_transform_init_identity (&ftransform);
+
+ if (may_be_null && gtk_toggle_button_get_active (
+ GTK_TOGGLE_BUTTON (get_widget (app, "lock_checkbutton"))))
+ {
+ copy_to_counterpart (app, G_OBJECT (may_be_null));
+ }
+
+ fscale_x = gtk_adjustment_get_value (app->scale_x_adjustment);
+ fscale_y = gtk_adjustment_get_value (app->scale_y_adjustment);
+ rotation = gtk_adjustment_get_value (app->rotate_adjustment);
+
+ fscale_x = to_scale (fscale_x);
+ fscale_y = to_scale (fscale_y);
+
+ new_width = pixman_image_get_width (app->original) * fscale_x;
+ new_height = pixman_image_get_height (app->original) * fscale_y;
+
+ pixman_f_transform_scale (&ftransform, NULL, fscale_x, fscale_y);
+
+ pixman_f_transform_translate (&ftransform, NULL, - new_width / 2.0, - new_height / 2.0);
+
+ rotation = (rotation / 360.0) * 2 * M_PI;
+ pixman_f_transform_rotate (&ftransform, NULL, cos (rotation), sin (rotation));
+
+ pixman_f_transform_translate (&ftransform, NULL, new_width / 2.0, new_height / 2.0);
+
+ pixman_f_transform_invert (&ftransform, &ftransform);
+
+ compute_extents (&ftransform, &sx, &sy);
+
+ pixman_transform_from_pixman_f_transform (&transform, &ftransform);
+ pixman_image_set_transform (app->original, &transform);
+
+ params = pixman_filter_create_separable_convolution (
+ &n_params,
+ sx * 65536.0 + 0.5,
+ sy * 65536.0 + 0.5,
+ get_value (app, filters, "reconstruct_x_combo_box"),
+ get_value (app, filters, "reconstruct_y_combo_box"),
+ get_value (app, filters, "sample_x_combo_box"),
+ get_value (app, filters, "sample_y_combo_box"),
+ gtk_adjustment_get_value (app->subsample_adjustment),
+ gtk_adjustment_get_value (app->subsample_adjustment));
+
+ pixman_image_set_filter (app->original, PIXMAN_FILTER_SEPARABLE_CONVOLUTION, params, n_params);
+
+ pixman_image_set_repeat (
+ app->original, get_value (app, repeats, "repeat_combo_box"));
+
+ free (params);
+
+ app->scaled_width = ceil (new_width);
+ app->scaled_height = ceil (new_height);
+
+ gtk_widget_set_size_request (
+ get_widget (app, "drawing_area"), new_width + 0.5, new_height + 0.5);
+
+ gtk_widget_queue_draw (
+ get_widget (app, "drawing_area"));
+}
+
+static gboolean
+on_expose (GtkWidget *da, GdkEvent *event, gpointer data)
+{
+ app_t *app = data;
+ GdkRectangle *area = &event->expose.area;
+ cairo_surface_t *surface;
+ pixman_image_t *tmp;
+ cairo_t *cr;
+ uint32_t *pixels;
+
+ pixels = calloc (1, area->width * area->height * 4);
+ tmp = pixman_image_create_bits (
+ PIXMAN_a8r8g8b8, area->width, area->height, pixels, area->width * 4);
+
+ if (area->x < app->scaled_width && area->y < app->scaled_height)
+ {
+ pixman_image_composite (
+ PIXMAN_OP_SRC,
+ app->original, NULL, tmp,
+ area->x, area->y, 0, 0, 0, 0,
+ app->scaled_width - area->x, app->scaled_height - area->y);
+ }
+
+ surface = cairo_image_surface_create_for_data (
+ (uint8_t *)pixels, CAIRO_FORMAT_ARGB32,
+ area->width, area->height, area->width * 4);
+
+ cr = gdk_cairo_create (da->window);
+
+ cairo_set_source_surface (cr, surface, area->x, area->y);
+
+ cairo_paint (cr);
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+ free (pixels);
+ pixman_image_unref (tmp);
+
+ return TRUE;
+}
+
+static void
+set_up_combo_box (app_t *app, const char *box_name,
+ int n_entries, const named_int_t table[])
+{
+ GtkWidget *widget = get_widget (app, box_name);
+ GtkListStore *model;
+ GtkCellRenderer *cell;
+ int i;
+
+ model = gtk_list_store_new (1, G_TYPE_STRING);
+
+ cell = gtk_cell_renderer_text_new ();
+ gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (widget), cell, TRUE);
+ gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (widget), cell,
+ "text", 0,
+ NULL);
+
+ gtk_combo_box_set_model (GTK_COMBO_BOX (widget), GTK_TREE_MODEL (model));
+
+ for (i = 0; i < n_entries; ++i)
+ {
+ const named_int_t *info = &(table[i]);
+ GtkTreeIter iter;
+
+ gtk_list_store_append (model, &iter);
+ gtk_list_store_set (model, &iter, 0, info->name, -1);
+ }
+
+ gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0);
+
+ g_signal_connect (widget, "changed", G_CALLBACK (rescale), app);
+}
+
+static void
+set_up_filter_box (app_t *app, const char *box_name)
+{
+ set_up_combo_box (app, box_name, G_N_ELEMENTS (filters), filters);
+}
+
+static char *
+format_value (GtkWidget *widget, double value)
+{
+ return g_strdup_printf ("%.4f", to_scale (value));
+}
+
+static app_t *
+app_new (pixman_image_t *original)
+{
+ GtkWidget *widget;
+ app_t *app = g_malloc (sizeof *app);
+ GError *err = NULL;
+
+ app->builder = gtk_builder_new ();
+ app->original = original;
+
+ if (!gtk_builder_add_from_file (app->builder, "scale.ui", &err))
+ g_error ("Could not read file scale.ui: %s", err->message);
+
+ app->scale_x_adjustment =
+ GTK_ADJUSTMENT (gtk_builder_get_object (app->builder, "scale_x_adjustment"));
+ app->scale_y_adjustment =
+ GTK_ADJUSTMENT (gtk_builder_get_object (app->builder, "scale_y_adjustment"));
+ app->rotate_adjustment =
+ GTK_ADJUSTMENT (gtk_builder_get_object (app->builder, "rotate_adjustment"));
+ app->subsample_adjustment =
+ GTK_ADJUSTMENT (gtk_builder_get_object (app->builder, "subsample_adjustment"));
+
+ g_signal_connect (app->scale_x_adjustment, "value_changed", G_CALLBACK (rescale), app);
+ g_signal_connect (app->scale_y_adjustment, "value_changed", G_CALLBACK (rescale), app);
+ g_signal_connect (app->rotate_adjustment, "value_changed", G_CALLBACK (rescale), app);
+ g_signal_connect (app->subsample_adjustment, "value_changed", G_CALLBACK (rescale), app);
+
+ widget = get_widget (app, "scale_x_scale");
+ gtk_scale_add_mark (GTK_SCALE (widget), 0.0, GTK_POS_LEFT, NULL);
+ g_signal_connect (widget, "format_value", G_CALLBACK (format_value), app);
+ widget = get_widget (app, "scale_y_scale");
+ gtk_scale_add_mark (GTK_SCALE (widget), 0.0, GTK_POS_LEFT, NULL);
+ g_signal_connect (widget, "format_value", G_CALLBACK (format_value), app);
+ widget = get_widget (app, "rotate_scale");
+ gtk_scale_add_mark (GTK_SCALE (widget), 0.0, GTK_POS_LEFT, NULL);
+
+ widget = get_widget (app, "drawing_area");
+ g_signal_connect (widget, "expose_event", G_CALLBACK (on_expose), app);
+
+ set_up_filter_box (app, "reconstruct_x_combo_box");
+ set_up_filter_box (app, "reconstruct_y_combo_box");
+ set_up_filter_box (app, "sample_x_combo_box");
+ set_up_filter_box (app, "sample_y_combo_box");
+
+ set_up_combo_box (
+ app, "repeat_combo_box", G_N_ELEMENTS (repeats), repeats);
+
+ g_signal_connect (
+ gtk_builder_get_object (app->builder, "lock_checkbutton"),
+ "toggled", G_CALLBACK (rescale), app);
+
+ rescale (NULL, app);
+
+ return app;
+}
+
+int
+main (int argc, char **argv)
+{
+ GtkWidget *window;
+ pixman_image_t *image;
+ app_t *app;
+
+ gtk_init (&argc, &argv);
+
+ if (argc < 2)
+ {
+ printf ("%s <image file>\n", argv[0]);
+ return -1;
+ }
+
+ if (!(image = pixman_image_from_file (argv[1], PIXMAN_a8r8g8b8)))
+ {
+ printf ("Could not load image \"%s\"\n", argv[1]);
+ return -1;
+ }
+
+ app = app_new (image);
+
+ window = get_widget (app, "main");
+
+ g_signal_connect (window, "delete_event", G_CALLBACK (gtk_main_quit), NULL);
+
+ gtk_window_set_default_size (GTK_WINDOW (window), 1024, 768);
+
+ gtk_widget_show_all (window);
+
+ gtk_main ();
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff