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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
test-ft-gtk.c: Testbed for freetype/libart integration.
Copyright (C) 2000 Eazel, Inc.
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 2 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, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Raph Levien <raph@artofcode.com>
*/
#include <stdio.h>
#include <stdlib.h>
#include <png.h>
#include <popt.h>
#include <math.h>
#include <sys/time.h>
#include <unistd.h>
#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <freetype/freetype.h>
#include <libart_lgpl/art_misc.h>
#include <libart_lgpl/art_rect.h>
#include <libart_lgpl/art_alphagamma.h>
#include <libart_lgpl/art_affine.h>
#include "art_render.h"
#include "art_render_mask.h"
#include "rsvg.h"
#include "rsvg-ft.h"
typedef struct _TestCtx TestCtx;
struct _TestCtx {
RsvgFTCtx *ctx;
RsvgFTFontHandle fh;
int n_lines;
char **lines;
int y_sp;
int y_scroll;
GtkWidget *drawingarea;
GtkWidget *status;
double start_time;
gboolean do_drawing;
gboolean do_scrolling;
gboolean do_invert;
};
static double
timing_get_time (void)
{
struct timeval tv;
struct timezone tz;
gettimeofday (&tv, &tz);
return tv.tv_sec + 1e-6 * tv.tv_usec;
}
static void invert_glyph (guchar *buf, int rowstride, int width, int height)
{
int x, y;
int first;
int n_words;
int last;
guint32 *middle;
if (width >= 8 && ((rowstride & 3) == 0)) {
first = (-(int)buf) & 3;
n_words = (width - first) >> 2;
last = first + (n_words << 2);
for (y = 0; y < height; y++) {
middle = (guint32 *)(buf + first);
for (x = 0; x < first; x++)
buf[x] = ~buf[x];
for (x = 0; x < n_words; x++)
middle[x] = ~middle[x];
for (x = last; x < width; x++)
buf[x] = ~buf[x];
buf += rowstride;
}
} else {
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++)
buf[x] = ~buf[x];
buf += rowstride;
}
}
}
static void draw_line (TestCtx *ctx, int line_num, ArtIRect *rect)
{
GtkWidget *drawingarea = ctx->drawingarea;
int y0;
RsvgFTGlyph *glyph;
const double affine[6] = { 1, 0, 0, 1, 5, 12 };
int glyph_xy[2];
ArtIRect line_rect, clear_rect, glyph_rect, draw_rect;
int width;
width = drawingarea->allocation.width;
y0 = line_num * ctx->y_sp - ctx->y_scroll;
if (line_num < 0 || line_num >= ctx->n_lines) {
if (ctx->do_drawing) {
gdk_draw_rectangle (drawingarea->window,
drawingarea->style->white_gc,
TRUE,
0, y0, width, ctx->y_sp);
}
} else {
guchar *buf;
int rowstride;
glyph = rsvg_ft_render_string (ctx->ctx, ctx->fh,
ctx->lines[line_num],
strlen (ctx->lines[line_num]),
14, 14,
affine,
glyph_xy);
rowstride = glyph->rowstride;
glyph_rect.x0 = glyph_xy[0];
glyph_rect.y0 = y0 + glyph_xy[1];
glyph_rect.x1 = glyph_rect.x0 + glyph->width;
glyph_rect.y1 = glyph_rect.y0 + glyph->height;
line_rect.x0 = 0;
line_rect.y0 = y0;
line_rect.x1 = width;
line_rect.y1 = y0 + ctx->y_sp;
art_irect_intersect (&clear_rect, rect, &line_rect);
if (ctx->do_drawing)
gdk_draw_rectangle (drawingarea->window,
drawingarea->style->white_gc,
TRUE,
clear_rect.x0, clear_rect.y0,
clear_rect.x1 - clear_rect.x0,
clear_rect.y1 - clear_rect.y0);
art_irect_intersect (&draw_rect, rect, &glyph_rect);
if (!art_irect_empty (&draw_rect) && ctx->do_drawing) {
buf = glyph->buf +
draw_rect.x0 - glyph_rect.x0 +
rowstride * (draw_rect.y0 - glyph_rect.y0);
if (ctx->do_invert) {
invert_glyph (buf, rowstride,
draw_rect.x1 - draw_rect.x0,
draw_rect.y1 - draw_rect.y0);
}
gdk_draw_gray_image (drawingarea->window,
drawingarea->style->white_gc,
draw_rect.x0, draw_rect.y0,
draw_rect.x1 - draw_rect.x0,
draw_rect.y1 - draw_rect.y0,
GDK_RGB_DITHER_NONE,
buf,
rowstride);
}
rsvg_ft_glyph_unref (glyph);
}
}
static gint
test_expose (GtkWidget *widget, GdkEventExpose *event, TestCtx *ctx)
{
int line0, line1;
int line;
ArtIRect rect;
rect.x0 = event->area.x;
rect.y0 = event->area.y;
rect.x1 = rect.x0 + event->area.width;
rect.y1 = rect.y0 + event->area.height;
line0 = (rect.y0 + ctx->y_scroll) / ctx->y_sp;
line1 = (rect.y1 + ctx->y_scroll + ctx->y_sp - 1) / ctx->y_sp;
for (line = line0; line < line1; line++) {
#ifdef VERBOSE
g_print ("drawing line %d of [%d..%d]\n", line, line0, line1 - 1);
#endif
draw_line (ctx, line, &rect);
}
return FALSE;
}
static void
scroll_to (TestCtx *ctx, int new_y)
{
GtkWidget *drawingarea = ctx->drawingarea;
int scroll_amt = new_y - ctx->y_scroll;
int width = drawingarea->allocation.width;
int height = drawingarea->allocation.height;
int y0, y1;
GdkEventExpose expose;
if (scroll_amt == 0)
return;
#ifdef VERBOSE
g_print ("scrolling to %d\n", new_y);
#endif
if (scroll_amt > 0 && scroll_amt < height) {
y0 = height - scroll_amt;
y1 = height;
if (ctx->do_scrolling) {
gdk_draw_pixmap (drawingarea->window,
drawingarea->style->white_gc,
drawingarea->window,
0, scroll_amt,
0, 0,
width, y0);
}
} else if (scroll_amt < 0 && -scroll_amt < height) {
y0 = 0;
y1 = -scroll_amt;
if (ctx->do_scrolling) {
gdk_draw_pixmap (drawingarea->window,
drawingarea->style->white_gc,
drawingarea->window,
0, 0,
0, y1,
width, height - y1);
}
} else {
y0 = 0;
y1 = height;
}
ctx->y_scroll = new_y;
expose.area.x = 0;
expose.area.width = width;
expose.area.y = y0;
expose.area.height = y1 - y0;
test_expose (drawingarea, &expose, ctx);
}
static gboolean scroll_idler (gpointer data)
{
TestCtx *ctx = (TestCtx *)data;
GtkWidget *drawingarea = ctx->drawingarea;
int width = drawingarea->allocation.width;
int height = drawingarea->allocation.height;
if ((ctx->y_scroll + height) < ctx->n_lines * ctx->y_sp) {
scroll_to (ctx, ctx->y_scroll + 100);
return TRUE;
} else {
double elapsed;
char str[128];
scroll_to (ctx, 0);
elapsed = timing_get_time () - ctx->start_time;
sprintf (str, "%g seconds to scroll, %g Mpix/s",
elapsed,
width * ctx->y_sp * ctx->n_lines * 1e-6 / elapsed);
gtk_label_set_text (GTK_LABEL (ctx->status), str);
return FALSE;
}
}
static void
check_toggle (GtkWidget *button, int state, gboolean *bool) {
*bool = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));
}
static GtkWidget *
check_button (const char *label, gboolean *bool) {
GtkWidget *result;
result = gtk_check_button_new_with_label (label);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (result), *bool);
gtk_signal_connect (GTK_OBJECT (result), "state_changed",
(GtkSignalFunc) check_toggle, bool);
return result;
}
static void
start_scrolling (GtkWidget *widget, TestCtx *ctx)
{
scroll_to (ctx, 0);
gtk_idle_add (scroll_idler, ctx);
ctx->start_time = timing_get_time ();
gtk_label_set_text (GTK_LABEL (ctx->status), "Scrolling...");
}
static void
test_ft_quit (GtkWidget *widget, TestCtx *ctx)
{
rsvg_ft_ctx_done (ctx->ctx);
gtk_main_quit ();
}
static TestCtx *new_test_window (const char *fn, int width, int height)
{
GtkWidget *topwin;
GtkWidget *vbox;
GtkWidget *buttonbar;
GtkWidget *button;
GtkWidget *drawingarea;
TestCtx *ctx;
ctx = g_new (TestCtx, 1);
topwin = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_signal_connect (GTK_OBJECT (topwin), "destroy",
(GtkSignalFunc) test_ft_quit, ctx);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (topwin), vbox);
drawingarea = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (drawingarea), width, height);
gtk_box_pack_start (GTK_BOX (vbox), drawingarea, TRUE, TRUE, 0);
ctx->ctx = rsvg_ft_ctx_new ();
ctx->fh = rsvg_ft_intern (ctx->ctx, fn);
ctx->n_lines = 0;
ctx->lines = NULL;
ctx->y_sp = 16;
ctx->y_scroll = 0;
ctx->drawingarea = drawingarea;
ctx->do_drawing = TRUE;
ctx->do_scrolling = TRUE;
ctx->do_invert = TRUE;
gtk_signal_connect (GTK_OBJECT (drawingarea), "expose_event",
(GtkSignalFunc) test_expose, ctx);
buttonbar = gtk_hbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (vbox), buttonbar, FALSE, FALSE, 0);
button = check_button ("Do drawing", &ctx->do_drawing);
gtk_container_add (GTK_CONTAINER (buttonbar), button);
button = check_button ("Do scrolling", &ctx->do_scrolling);
gtk_container_add (GTK_CONTAINER (buttonbar), button);
button = check_button ("Do invert", &ctx->do_invert);
gtk_container_add (GTK_CONTAINER (buttonbar), button);
button = gtk_button_new_with_label ("Start scroll test");
gtk_container_add (GTK_CONTAINER (buttonbar), button);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) start_scrolling, ctx);
ctx->status = gtk_label_new ("");
gtk_box_pack_start (GTK_BOX (vbox), ctx->status, FALSE, FALSE, 2);
gtk_widget_show_all (topwin);
return ctx;
}
static void set_text (TestCtx *ctx, const char *fn) {
FILE *f;
char line[256];
int n_lines;
char **lines;
lines = NULL;
f = fopen (fn, "r");
if (f == NULL) {
g_warning ("Error opening file %s\n", fn);
return;
}
n_lines = 0;
for (;;) {
int len;
if (fgets (line, sizeof(line), f) == NULL)
break;
if (n_lines == 0)
lines = g_new (char *, 1);
else if (!(n_lines & (n_lines - 1))) {
lines = g_renew (char *, lines, n_lines << 1);
}
g_assert (lines != NULL);
len = strlen (line);
if (len > 0 && line[len - 1] == '\n')
line[--len] = 0;
while (len > 0 && line[len - 1] == '\r')
line[--len] = 0;
lines[n_lines++] = g_strdup (line);
}
fclose (f);
ctx->n_lines = n_lines;
ctx->lines = lines;
}
int main(int argc, char **argv)
{
char *zoom_str = "1.0";
gint font_width = 36;
gint font_height = 36;
char *font_file_name = "/usr/share/fonts/default/Type1/n021003l.pfb";
char *text_file_name = "rsvg-ft.c";
poptContext optCtx;
struct poptOption optionsTable[] =
{
{"zoom", 'z', POPT_ARG_STRING, &zoom_str, 0, NULL, "zoom factor"},
{"font-width", 'w', POPT_ARG_INT, &font_width, 0, NULL, "Font Width"},
{"font-height", 'h', POPT_ARG_INT, &font_height, 0, NULL, "Font Height"},
{"font-file-name", 'f', POPT_ARG_STRING, &font_file_name, 0, NULL, "Font File Name"},
{"text-file-name", 't', POPT_ARG_STRING, &text_file_name, 0, NULL, "Text"},
POPT_AUTOHELP {NULL, 0, 0, NULL, 0}
};
char c;
const char *const *args;
TestCtx *ctx;
gtk_init (&argc, &argv);
gdk_rgb_init ();
gtk_widget_set_default_colormap (gdk_rgb_get_cmap ());
gtk_widget_set_default_visual (gdk_rgb_get_visual ());
optCtx =
poptGetContext("test-ft", argc, (const char **) argv,
optionsTable, 0);
c = poptGetNextOpt(optCtx);
args = poptGetArgs(optCtx);
ctx = new_test_window (font_file_name, 640, 480);
set_text (ctx, text_file_name);
gtk_main ();
return 0;
}
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