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Add function to create a GdkPixbuf from a string. Also fixed a debuggin

Browse source 
* libnautilus-extensions/nautilus-scalable-font.h:
	* libnautilus-extensions/nautilus-scalable-font.c:
	(nautilus_scalable_font_draw_text), (nautilus_text_layout_paint),
	(nautilus_gdk_pixbuf_new_from_text):
	Add function to create a GdkPixbuf from a string.  Also fixed a
	debuggin typo from before.

	* test/test-nautilus-font.c: (create_named_background),
	(rgba_run_alpha), (pixbuf_draw_rectangle),
	(pixbuf_draw_rectangle_around), (main):
	Add text to GdkPixbuf to GdkPixbuf compositing test.  Also add a
	bunch of hacks to make the tests more useful.
This commit is contained in:
Ramiro Estrugo 2000-09-07 16:27:41 +00:00
parent 0f1d07d9f9
commit afc5e4d4e4
6 changed files with 369 additions and 82 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2000-09-07 Ramiro Estrugo <ramiro@eazel.com>
* libnautilus-extensions/nautilus-scalable-font.h:
* libnautilus-extensions/nautilus-scalable-font.c:
(nautilus_scalable_font_draw_text), (nautilus_text_layout_paint),
(nautilus_gdk_pixbuf_new_from_text):
Add function to create a GdkPixbuf from a string. Also fixed a
debuggin typo from before.
* test/test-nautilus-font.c: (create_named_background),
(rgba_run_alpha), (pixbuf_draw_rectangle),
(pixbuf_draw_rectangle_around), (main):
Add text to GdkPixbuf to GdkPixbuf compositing test. Also add a
bunch of hacks to make the tests more useful.
2000-09-07 Mathieu Lacage <mathieu@eazel.com>
First work toward bug 2353, fixes bug 2570, 1289

59
libnautilus-extensions/nautilus-scalable-font.c
View file

@ -785,8 +785,7 @@ nautilus_scalable_font_draw_text (const NautilusScalableFont *font,
invert_area = glyph_area;
}
//if (!art_irect_empty (&invert_area)) {
{
if (!art_irect_empty (&invert_area)) {
guchar *glyph_pixels;
guint glyph_rowstride;
@ -1703,7 +1702,7 @@ nautilus_text_layout_paint (const NautilusTextLayout *text_layout,
text_layout->font_size,
row->text,
row->text_length,
color,
NAUTILUS_RGBA_COLOR_PACK (255, 255, 255, 255),
255,
inverted);
@ -1731,6 +1730,60 @@ nautilus_text_layout_paint (const NautilusTextLayout *text_layout,
}
}
GdkPixbuf *
nautilus_gdk_pixbuf_new_from_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
GdkPixbuf *pixbuf;
guint text_width;
guint text_height;
g_return_val_if_fail (NAUTILUS_IS_SCALABLE_FONT (font), NULL);
g_return_val_if_fail (font_width > 0, NULL);
g_return_val_if_fail (font_height > 0, NULL);
if (text == NULL || text[0] == '\0' || text_length == 0) {
return NULL;
}
g_return_val_if_fail (text_length <= strlen (text), NULL);
nautilus_scalable_font_measure_text (font,
font_width,
font_height,
text,
strlen (text),
&text_width,
&text_height);
g_assert (text_width > 0);
g_assert (text_height > 0);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, text_width, text_height);
nautilus_gdk_pixbuf_fill_rectangle_with_color (pixbuf, NULL, NAUTILUS_RGBA_COLOR_PACK (0, 0, 0, 0));
nautilus_scalable_font_draw_text (font,
pixbuf,
0,
0,
NULL,
font_width,
font_height,
text,
strlen (text),
color,
overall_alpha,
inverted);
return pixbuf;
}
#if !defined (NAUTILUS_OMIT_SELF_CHECK)
void

24
libnautilus-extensions/nautilus-scalable-font.h
View file

@ -100,13 +100,13 @@ void nautilus_scalable_font_draw_text (c
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
void nautilus_scalable_font_measure_text_lines (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint num_text_lines,
double empty_line_height,
double empty_line_height,
guint text_line_widths[],
guint text_line_heights[],
guint *max_width_out,
@ -124,10 +124,10 @@ void nautilus_scalable_font_draw_text_lines_with_dimensions (c
const guint *text_line_heights,
GtkJustification justification,
guint line_offset,
double empty_line_height,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
void nautilus_scalable_font_draw_text_lines (const NautilusScalableFont *font,
GdkPixbuf *destination_pixbuf,
int x,
@ -138,10 +138,10 @@ void nautilus_scalable_font_draw_text_lines (c
const char *text,
GtkJustification justification,
guint line_offset,
double empty_line_height,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
guint nautilus_scalable_font_largest_fitting_font_size (const NautilusScalableFont *font,
const char *text,
guint available_width,
@ -157,6 +157,16 @@ gboolean nautilus_scalable_font_query_font (c
NautilusStringList **weights,
NautilusStringList **slants,
NautilusStringList **set_widths);
GdkPixbuf * nautilus_gdk_pixbuf_new_from_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted);
/*
* The following text_layout stuff was shamelessly plundered
@ -198,7 +208,7 @@ void nautilus_text_layout_paint (const NautilusTextLayout *text
GdkPixbuf *pixbuf,
int x,
int y,
GtkJustification just,
GtkJustification justification,
guint32 color,
gboolean inverted,
gboolean underlined);

59
libnautilus-private/nautilus-scalable-font.c
View file

@ -785,8 +785,7 @@ nautilus_scalable_font_draw_text (const NautilusScalableFont *font,
invert_area = glyph_area;
}
//if (!art_irect_empty (&invert_area)) {
{
if (!art_irect_empty (&invert_area)) {
guchar *glyph_pixels;
guint glyph_rowstride;
@ -1703,7 +1702,7 @@ nautilus_text_layout_paint (const NautilusTextLayout *text_layout,
text_layout->font_size,
row->text,
row->text_length,
color,
NAUTILUS_RGBA_COLOR_PACK (255, 255, 255, 255),
255,
inverted);
@ -1731,6 +1730,60 @@ nautilus_text_layout_paint (const NautilusTextLayout *text_layout,
}
}
GdkPixbuf *
nautilus_gdk_pixbuf_new_from_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted)
{
GdkPixbuf *pixbuf;
guint text_width;
guint text_height;
g_return_val_if_fail (NAUTILUS_IS_SCALABLE_FONT (font), NULL);
g_return_val_if_fail (font_width > 0, NULL);
g_return_val_if_fail (font_height > 0, NULL);
if (text == NULL || text[0] == '\0' || text_length == 0) {
return NULL;
}
g_return_val_if_fail (text_length <= strlen (text), NULL);
nautilus_scalable_font_measure_text (font,
font_width,
font_height,
text,
strlen (text),
&text_width,
&text_height);
g_assert (text_width > 0);
g_assert (text_height > 0);
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, text_width, text_height);
nautilus_gdk_pixbuf_fill_rectangle_with_color (pixbuf, NULL, NAUTILUS_RGBA_COLOR_PACK (0, 0, 0, 0));
nautilus_scalable_font_draw_text (font,
pixbuf,
0,
0,
NULL,
font_width,
font_height,
text,
strlen (text),
color,
overall_alpha,
inverted);
return pixbuf;
}
#if !defined (NAUTILUS_OMIT_SELF_CHECK)
void

24
libnautilus-private/nautilus-scalable-font.h
View file

@ -100,13 +100,13 @@ void nautilus_scalable_font_draw_text (c
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
void nautilus_scalable_font_measure_text_lines (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint num_text_lines,
double empty_line_height,
double empty_line_height,
guint text_line_widths[],
guint text_line_heights[],
guint *max_width_out,
@ -124,10 +124,10 @@ void nautilus_scalable_font_draw_text_lines_with_dimensions (c
const guint *text_line_heights,
GtkJustification justification,
guint line_offset,
double empty_line_height,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
void nautilus_scalable_font_draw_text_lines (const NautilusScalableFont *font,
GdkPixbuf *destination_pixbuf,
int x,
@ -138,10 +138,10 @@ void nautilus_scalable_font_draw_text_lines (c
const char *text,
GtkJustification justification,
guint line_offset,
double empty_line_height,
double empty_line_height,
guint32 color,
guchar overall_alpha,
gboolean inverted);
gboolean inverted);
guint nautilus_scalable_font_largest_fitting_font_size (const NautilusScalableFont *font,
const char *text,
guint available_width,
@ -157,6 +157,16 @@ gboolean nautilus_scalable_font_query_font (c
NautilusStringList **weights,
NautilusStringList **slants,
NautilusStringList **set_widths);
GdkPixbuf * nautilus_gdk_pixbuf_new_from_text (const NautilusScalableFont *font,
guint font_width,
guint font_height,
const char *text,
guint text_length,
guint32 color,
guchar overall_alpha,
gboolean inverted);
/*
* The following text_layout stuff was shamelessly plundered
@ -198,7 +208,7 @@ void nautilus_text_layout_paint (const NautilusTextLayout *text
GdkPixbuf *pixbuf,
int x,
int y,
GtkJustification just,
GtkJustification justification,
guint32 color,
gboolean inverted,
gboolean underlined);

270
test/test-nautilus-font.c
View file

@ -25,6 +25,11 @@
#include <libart_lgpl/art_svp_vpath_stroke.h>
#include <libart_lgpl/art_rgb_svp.h>
#include <libart_lgpl/art_svp_vpath.h>
#include <libart_lgpl/art_rgb.h>
#include <libgnomevfs/gnome-vfs-init.h>
/* Danger! Many Gremlins live here. */
/* FIXME: Need to account for word endianess in these macros */
#define ART_OPACITY_NONE 255
@ -54,67 +59,144 @@
#define BLUE ART_RGB_COLOR_PACK (0, 0, 255)
#define WHITE ART_RGB_COLOR_PACK (255, 255, 255)
#define BLACK ART_RGB_COLOR_PACK (0, 0, 0)
#define TRANSPARENT ART_RGB_COLOR_PACK (255, 255, 255)
#define TRANSPARENT ART_RGBA_COLOR_PACK (255, 255, 255, 0)
static void
gdk_pixbuf_draw_rectangle (GdkPixbuf *pixbuf,
const ArtIRect *rectangle,
guint32 color)
static GdkPixbuf *
create_named_background (const char *name)
{
ArtVpath vpath[6];
ArtSVP *svp;
g_return_if_fail (pixbuf != NULL);
g_return_if_fail (rectangle != NULL);
g_return_if_fail (rectangle->x1 > rectangle->x0);
g_return_if_fail (rectangle->y1 > rectangle->y0);
vpath[0].code = ART_MOVETO;
vpath[0].x = rectangle->x0;
vpath[0].y = rectangle->y0;
vpath[1].code = ART_LINETO;
vpath[1].x = rectangle->x1;
vpath[1].y = rectangle->y0;
vpath[2].code = ART_LINETO;
vpath[2].x = rectangle->x1;
vpath[2].y = rectangle->y1;
vpath[3].code = ART_LINETO;
vpath[3].x = rectangle->x0;
vpath[3].y = rectangle->y1;
vpath[4].code = ART_LINETO;
vpath[4].x = rectangle->x0;
vpath[4].y = rectangle->y0;
vpath[5].code = ART_END;
svp = art_svp_vpath_stroke (vpath,
ART_PATH_STROKE_JOIN_BEVEL,
ART_PATH_STROKE_CAP_SQUARE,
1.0,
1.0,
1.0);
art_rgb_svp_alpha (svp,
0,
0,
gdk_pixbuf_get_width (pixbuf),
gdk_pixbuf_get_height (pixbuf),
color,
gdk_pixbuf_get_pixels (pixbuf),
gdk_pixbuf_get_rowstride (pixbuf),
NULL);
GdkPixbuf *pixbuf;
char *path;
art_svp_free (svp);
g_return_val_if_fail (name != NULL, NULL);
path = nautilus_make_path (NAUTILUS_DATADIR "/backgrounds", name);
if (path == NULL) {
return NULL;
}
pixbuf = gdk_pixbuf_new_from_file (path);
g_free (path);
return pixbuf;
}
static void
draw_rectangle_around (GdkPixbuf *pixbuf,
rgba_run_alpha (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n)
{
int i;
int v;
for (i = 0; i < n; i++)
{
v = *buf;
*buf++ = v + (((r - v) * alpha + 0x80) >> 8);
v = *buf;
*buf++ = v + (((g - v) * alpha + 0x80) >> 8);
v = *buf;
*buf++ = v + (((b - v) * alpha + 0x80) >> 8);
*buf++ = 255;
}
}
typedef void (*RunFunc) (art_u8 *buf, art_u8 r, art_u8 g, art_u8 b, int alpha, int n);
static void
pixbuf_draw_rectangle (GdkPixbuf *pixbuf,
const ArtIRect *rectangle,
guint32 color)
guint32 color,
gboolean filled)
{
guchar red;
guchar green;
guchar blue;
guchar alpha;
guint width;
guint height;
guchar *pixels;
guint rowstride;
int y;
gboolean has_alpha;
guint pixel_offset;
guchar *offset;
guint rect_width;
guint rect_height;
ArtIRect draw_area;
RunFunc run_func;
g_return_if_fail (pixbuf != NULL);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
pixels = gdk_pixbuf_get_pixels (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
pixel_offset = has_alpha ? 4 : 3;
red = ART_RGBA_GET_R (color);
green = ART_RGBA_GET_G (color);
blue = ART_RGBA_GET_B (color);
alpha = ART_RGBA_GET_A (color);
run_func = has_alpha ? rgba_run_alpha : art_rgb_run_alpha;
if (rectangle != NULL) {
g_return_if_fail (rectangle->x1 > rectangle->x0);
g_return_if_fail (rectangle->y1 > rectangle->y0);
rect_width = rectangle->x1 - rectangle->x0;
rect_height = rectangle->y1 - rectangle->y0;
draw_area = *rectangle;
}
else {
rect_width = width;
rect_height = height;
draw_area.x0 = 0;
draw_area.y0 = 0;
draw_area.x1 = width;
draw_area.y1 = height;
}
if (filled) {
offset = pixels + (draw_area.y0 * rowstride) + (draw_area.x0 * pixel_offset);
for (y = draw_area.y0; y < draw_area.y1; y++) {
(*run_func) (offset, red, green, blue, 255, rect_width);
offset += rowstride;
}
}
else {
/* top */
offset = pixels + (draw_area.y0 * rowstride) + (draw_area.x0 * pixel_offset);
(*run_func) (offset, red, green, blue, 255, rect_width);
/* bottom */
offset += ((rect_height - 1) * rowstride);
(*run_func) (offset, red, green, blue, 255, rect_width);
for (y = draw_area.y0 + 1; y < (draw_area.y1 - 1); y++) {
/* left */
offset = pixels + (y * rowstride) + (draw_area.x0 * pixel_offset);
(*run_func) (offset, red, green, blue, 255, 1);
/* right */
offset += (rect_width - 1) * pixel_offset;
(*run_func) (offset, red, green, blue, 255, 1);
}
}
}
static void
pixbuf_draw_rectangle_around (GdkPixbuf *pixbuf,
const ArtIRect *rectangle,
guint32 color)
{
ArtIRect area;
@ -129,7 +211,7 @@ draw_rectangle_around (GdkPixbuf *pixbuf,
area.y0 -= 1;
area.x1 += 1;
area.y1 += 1;
gdk_pixbuf_draw_rectangle (pixbuf, &area, color);
pixbuf_draw_rectangle (pixbuf, &area, color, FALSE);
area.x0 += 1;
area.y0 += 1;
area.x1 -= 1;
@ -159,6 +241,7 @@ main (int argc, char* argv[])
gtk_init (&argc, &argv);
gdk_rgb_init ();
gnome_vfs_init ();
font = NAUTILUS_SCALABLE_FONT (nautilus_scalable_font_new ("Nimbus Sans L", NULL, NULL, NULL));
g_assert (font != NULL);
@ -166,7 +249,7 @@ main (int argc, char* argv[])
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, FALSE, 8, pixbuf_width, pixbuf_height);
g_assert (pixbuf != NULL);
nautilus_gdk_pixbuf_fill_rectangle_with_color (pixbuf, NULL, TRANSPARENT);
pixbuf_draw_rectangle (pixbuf, NULL, TRANSPARENT, TRUE);
multi_lines_area.x0 = multi_line_x;
multi_lines_area.y0 = multi_line_y;
@ -213,14 +296,14 @@ main (int argc, char* argv[])
clip_area.x1 = clip_area.x0 + 100;
clip_area.y1 = clip_area.y0 + 30;
draw_rectangle_around (pixbuf, &clip_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &clip_area, RED);
whole_area.x0 = 0;
whole_area.y0 = 0;
whole_area.x1 = whole_area.x0 + pixbuf_width;
whole_area.y1 = whole_area.y0 + pixbuf_height;
draw_rectangle_around (pixbuf, &multi_lines_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &multi_lines_area, RED);
/*
* Multiple text lines test.
@ -276,6 +359,67 @@ main (int argc, char* argv[])
255,
TRUE);
/*
* Composited text lines test.
*/
{
ArtIRect composited_area;
GdkPixbuf *background_pixbuf;
GdkPixbuf *text_pixbuf;
GdkRectangle dest_rect;
const char *text = "Foo Bar";
const guint font_size = 50;
background_pixbuf = create_named_background ("pale_coins.png");
composited_area.x0 = 270;
composited_area.y0 = 80;
composited_area.x1 = composited_area.x0 + 200;
composited_area.y1 = composited_area.y0 + 200;
pixbuf_draw_rectangle_around (pixbuf, &composited_area, RED);
dest_rect.x = composited_area.x0;
dest_rect.y = composited_area.y0;
dest_rect.width = composited_area.x1 - composited_area.x0;
dest_rect.height = composited_area.y1 - composited_area.y0;
nautilus_gdk_pixbuf_render_to_pixbuf_tiled (background_pixbuf,
pixbuf,
&dest_rect,
0,
0);
gdk_pixbuf_unref (background_pixbuf);
text_pixbuf = nautilus_gdk_pixbuf_new_from_text (font,
font_size,
font_size,
text,
strlen (text),
BLACK,
255,
FALSE);
g_assert (text_pixbuf != NULL);
gdk_pixbuf_composite (text_pixbuf,
pixbuf,
composited_area.x0,
composited_area.y0,
gdk_pixbuf_get_width (text_pixbuf),
gdk_pixbuf_get_height (text_pixbuf),
(double) composited_area.x0,
(double) composited_area.y0,
1.0,
1.0,
GDK_INTERP_BILINEAR,
255);
gdk_pixbuf_unref (text_pixbuf);
}
/*
* Text layout test.
*/
@ -300,7 +444,7 @@ main (int argc, char* argv[])
layout_area.x1 = layout_area.x0 + max_text_width;
layout_area.y1 = layout_area.y0 + 130;
draw_rectangle_around (pixbuf, &layout_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &layout_area, RED);
nautilus_text_layout_paint (text_layout,
pixbuf,
@ -314,7 +458,7 @@ main (int argc, char* argv[])
layout_area.x0 += (max_text_width + 20);
layout_area.x1 += (max_text_width + 20);
draw_rectangle_around (pixbuf, &layout_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &layout_area, RED);
nautilus_text_layout_paint (text_layout,
pixbuf,
@ -328,7 +472,7 @@ main (int argc, char* argv[])
layout_area.x0 += (max_text_width + 20);
layout_area.x1 += (max_text_width + 20);
draw_rectangle_around (pixbuf, &layout_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &layout_area, RED);
nautilus_text_layout_paint (text_layout,
pixbuf,
@ -366,7 +510,7 @@ main (int argc, char* argv[])
layout_area.x1 = layout_area.x0 + text_layout->width;
layout_area.y1 = layout_area.y0 + text_layout->height;
draw_rectangle_around (pixbuf, &layout_area, RED);
pixbuf_draw_rectangle_around (pixbuf, &layout_area, RED);
nautilus_text_layout_paint (text_layout,
pixbuf,
@ -386,5 +530,7 @@ main (int argc, char* argv[])
gdk_pixbuf_unref (pixbuf);
gnome_vfs_shutdown ();
return 0;
}