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authorBenjamin Otte <otte@redhat.com>2010-10-15 19:21:15 +0800
committerMatthew Barnes <mbarnes@redhat.com>2010-10-30 01:50:01 +0800
commitf7767b0f25c8b06498031c63109ef13c2d87f0f5 (patch)
tree25c2436aaf888194a1ab8b92a059fcc30a4b2f9b
parent2e4810aaf79827a1d9acc693b5cfc70f6038ec27 (diff)
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gnome-canvas: Simplify GnomeCanvasPixbuf
Get rid of all the layout properties. They are unused, and if they are needed should be done in a separate object. Also do the drawing with Cairo.
-rw-r--r--libgnomecanvas/gnome-canvas-pixbuf.c540
1 files changed, 37 insertions, 503 deletions
diff --git a/libgnomecanvas/gnome-canvas-pixbuf.c b/libgnomecanvas/gnome-canvas-pixbuf.c
index 07c9415e26..1fc7760315 100644
--- a/libgnomecanvas/gnome-canvas-pixbuf.c
+++ b/libgnomecanvas/gnome-canvas-pixbuf.c
@@ -25,50 +25,18 @@
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-util.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
-#include <libart_lgpl/art_rgb_affine.h>
-#include <libart_lgpl/art_rgb_rgba_affine.h>
#include "gnome-canvas-pixbuf.h"
/* Private part of the GnomeCanvasPixbuf structure */
struct _GnomeCanvasPixbufPrivate {
/* Our gdk-pixbuf */
GdkPixbuf *pixbuf;
-
- /* Width value */
- gdouble width;
-
- /* Height value */
- gdouble height;
-
- /* X translation */
- gdouble x;
-
- /* Y translation */
- gdouble y;
-
- /* Whether dimensions are set and whether they are in pixels or units */
- guint width_set : 1;
- guint width_in_pixels : 1;
- guint height_set : 1;
- guint height_in_pixels : 1;
- guint x_in_pixels : 1;
- guint y_in_pixels : 1;
};
/* Object argument IDs */
enum {
PROP_0,
- PROP_PIXBUF,
- PROP_WIDTH,
- PROP_WIDTH_SET,
- PROP_WIDTH_IN_PIXELS,
- PROP_HEIGHT,
- PROP_HEIGHT_SET,
- PROP_HEIGHT_IN_PIXELS,
- PROP_X,
- PROP_X_IN_PIXELS,
- PROP_Y,
- PROP_Y_IN_PIXELS
+ PROP_PIXBUF
};
static void gnome_canvas_pixbuf_destroy (GnomeCanvasItem *object);
@@ -116,66 +84,6 @@ gnome_canvas_pixbuf_class_init (GnomeCanvasPixbufClass *class)
g_param_spec_object ("pixbuf", NULL, NULL,
GDK_TYPE_PIXBUF,
(G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_WIDTH,
- g_param_spec_double ("width", NULL, NULL,
- -G_MAXDOUBLE, G_MAXDOUBLE, 0,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_WIDTH_SET,
- g_param_spec_boolean ("width_set", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_WIDTH_IN_PIXELS,
- g_param_spec_boolean ("width_in_pixels", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_HEIGHT,
- g_param_spec_double ("height", NULL, NULL,
- -G_MAXDOUBLE, G_MAXDOUBLE, 0,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_HEIGHT_SET,
- g_param_spec_boolean ("height_set", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_HEIGHT_IN_PIXELS,
- g_param_spec_boolean ("height_in_pixels", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_X,
- g_param_spec_double ("x", NULL, NULL,
- -G_MAXDOUBLE, G_MAXDOUBLE, 0,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_X_IN_PIXELS,
- g_param_spec_boolean ("x_in_pixels", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_Y,
- g_param_spec_double ("y", NULL, NULL,
- -G_MAXDOUBLE, G_MAXDOUBLE, 0,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
- g_object_class_install_property
- (gobject_class,
- PROP_Y_IN_PIXELS,
- g_param_spec_boolean ("y_in_pixels", NULL, NULL,
- FALSE,
- (G_PARAM_READABLE | G_PARAM_WRITABLE)));
item_class->destroy = gnome_canvas_pixbuf_destroy;
item_class->update = gnome_canvas_pixbuf_update;
@@ -195,11 +103,6 @@ gnome_canvas_pixbuf_init (GnomeCanvasPixbuf *gcp)
priv = gcp->priv = G_TYPE_INSTANCE_GET_PRIVATE (gcp,
GNOME_TYPE_CANVAS_PIXBUF,
GnomeCanvasPixbufPrivate);
-
- priv->width = 0.0;
- priv->height = 0.0;
- priv->x = 0.0;
- priv->y = 0.0;
}
/* Destroy handler for the pixbuf canvas item */
@@ -240,7 +143,6 @@ gnome_canvas_pixbuf_set_property (GObject *object,
GnomeCanvasPixbuf *gcp;
GnomeCanvasPixbufPrivate *priv;
GdkPixbuf *pixbuf;
- gdouble val;
g_return_if_fail (object != NULL);
g_return_if_fail (GNOME_IS_CANVAS_PIXBUF (object));
@@ -262,60 +164,6 @@ gnome_canvas_pixbuf_set_property (GObject *object,
gnome_canvas_item_request_update (item);
break;
- case PROP_WIDTH:
- val = g_value_get_double (value);
- g_return_if_fail (val >= 0.0);
- priv->width = val;
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_WIDTH_SET:
- priv->width_set = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_WIDTH_IN_PIXELS:
- priv->width_in_pixels = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_HEIGHT:
- val = g_value_get_double (value);
- g_return_if_fail (val >= 0.0);
- priv->height = val;
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_HEIGHT_SET:
- priv->height_set = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_HEIGHT_IN_PIXELS:
- priv->height_in_pixels = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_X:
- priv->x = g_value_get_double (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_X_IN_PIXELS:
- priv->x_in_pixels = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_Y:
- priv->y = g_value_get_double (value);
- gnome_canvas_item_request_update (item);
- break;
-
- case PROP_Y_IN_PIXELS:
- priv->y_in_pixels = g_value_get_boolean (value);
- gnome_canvas_item_request_update (item);
- break;
-
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
@@ -343,46 +191,6 @@ gnome_canvas_pixbuf_get_property (GObject *object,
g_value_set_object (value, priv->pixbuf);
break;
- case PROP_WIDTH:
- g_value_set_double (value, priv->width);
- break;
-
- case PROP_WIDTH_SET:
- g_value_set_boolean (value, priv->width_set);
- break;
-
- case PROP_WIDTH_IN_PIXELS:
- g_value_set_boolean (value, priv->width_in_pixels);
- break;
-
- case PROP_HEIGHT:
- g_value_set_double (value, priv->height);
- break;
-
- case PROP_HEIGHT_SET:
- g_value_set_boolean (value, priv->height_set);
- break;
-
- case PROP_HEIGHT_IN_PIXELS:
- g_value_set_boolean (value, priv->height_in_pixels);
- break;
-
- case PROP_X:
- g_value_set_double (value, priv->x);
- break;
-
- case PROP_X_IN_PIXELS:
- g_value_set_boolean (value, priv->x_in_pixels);
- break;
-
- case PROP_Y:
- g_value_set_double (value, priv->y);
- break;
-
- case PROP_Y_IN_PIXELS:
- g_value_set_boolean (value, priv->y_in_pixels);
- break;
-
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
@@ -393,154 +201,17 @@ gnome_canvas_pixbuf_get_property (GObject *object,
/* Bounds and utilities */
-/* Computes the amount by which the unit horizontal and vertical vectors will be
- * scaled by an affine transformation.
- */
-static void
-compute_xform_scaling (gdouble *affine, ArtPoint *i_c, ArtPoint *j_c)
-{
- ArtPoint orig, orig_c;
- ArtPoint i, j;
-
- /* Origin */
-
- orig.x = 0.0;
- orig.y = 0.0;
- art_affine_point (&orig_c, &orig, affine);
-
- /* Horizontal and vertical vectors */
-
- i.x = 1.0;
- i.y = 0.0;
- art_affine_point (i_c, &i, affine);
- i_c->x -= orig_c.x;
- i_c->y -= orig_c.y;
-
- j.x = 0.0;
- j.y = 1.0;
- art_affine_point (j_c, &j, affine);
- j_c->x -= orig_c.x;
- j_c->y -= orig_c.y;
-}
-
-/* computes the addtional resolution dependent affine needed to
- * fit the image within its viewport defined by x,y,width and height
- * args
- */
-static void
-compute_viewport_affine (GnomeCanvasPixbuf *gcp,
- gdouble *viewport_affine,
- gdouble *i2c)
-{
- GnomeCanvasPixbufPrivate *priv;
- ArtPoint i_c, j_c;
- gdouble i_len, j_len;
- gdouble si_len, sj_len;
- gdouble ti_len, tj_len;
- gdouble scale[6], translate[6];
- gdouble w, h;
- gdouble x, y;
-
- priv = gcp->priv;
-
- /* Compute scaling vectors and required width/height */
-
- compute_xform_scaling (i2c, &i_c, &j_c);
-
- i_len = sqrt (i_c.x * i_c.x + i_c.y * i_c.y);
- j_len = sqrt (j_c.x * j_c.x + j_c.y * j_c.y);
-
- if (priv->width_set)
- w = priv->width;
- else
- w = gdk_pixbuf_get_width (priv->pixbuf);
-
- if (priv->height_set)
- h = priv->height;
- else
- h = gdk_pixbuf_get_height (priv->pixbuf);
-
- x = priv->x;
- y = priv->y;
-
- /* Convert i_len and j_len into scaling factors */
-
- if (priv->width_in_pixels) {
- if (i_len > GNOME_CANVAS_EPSILON)
- si_len = 1.0 / i_len;
- else
- si_len = 0.0;
- } else
- si_len = 1.0;
-
- si_len *= w / gdk_pixbuf_get_width (priv->pixbuf);
-
- if (priv->height_in_pixels) {
- if (j_len > GNOME_CANVAS_EPSILON)
- sj_len = 1.0 / j_len;
- else
- sj_len = 0.0;
- } else
- sj_len = 1.0;
-
- sj_len *= h / gdk_pixbuf_get_height (priv->pixbuf);
-
- /* Calculate translation offsets */
-
- if (priv->x_in_pixels) {
- if (i_len > GNOME_CANVAS_EPSILON)
- ti_len = 1.0 / i_len;
- else
- ti_len = 0.0;
- } else
- ti_len = 1.0;
-
- if (priv->y_in_pixels) {
- if (j_len > GNOME_CANVAS_EPSILON)
- tj_len = 1.0 / j_len;
- else
- tj_len = 0.0;
- } else
- tj_len = 1.0;
-
- /* Compute the final affine */
-
- art_affine_scale (scale, si_len, sj_len);
- art_affine_translate (translate, ti_len, tj_len);
- art_affine_multiply (viewport_affine, scale, translate);
-}
-
-/* Computes the affine transformation with which the pixbuf needs to be
- * transformed to render it on the canvas. This is not the same as the
- * item_to_canvas transformation because we may need to scale the pixbuf
- * by some other amount.
- */
-static void
-compute_render_affine (GnomeCanvasPixbuf *gcp, gdouble *ra, gdouble *i2c)
-{
- gdouble va[6];
-
- compute_viewport_affine (gcp, va, i2c);
-#ifdef GNOME_CANVAS_PIXBUF_VERBOSE
- g_print ("va %g %g %g %g %g %g\n", va[0], va[1], va[2], va[3], va[4], va[5]);
-#endif
- art_affine_multiply (ra, va, i2c);
-#ifdef GNOME_CANVAS_PIXBUF_VERBOSE
- g_print ("ra %g %g %g %g %g %g\n", ra[0], ra[1], ra[2], ra[3], ra[4], ra[5]);
-#endif
-}
-
/* Recomputes the bounding box of a pixbuf canvas item. The horizontal and
* vertical dimensions may be specified in units or pixels, separately, so we
* have to compute the components individually for each dimension.
*/
static void
-recompute_bounding_box (GnomeCanvasPixbuf *gcp, gdouble *i2c)
+recompute_bounding_box (GnomeCanvasPixbuf *gcp)
{
GnomeCanvasItem *item;
GnomeCanvasPixbufPrivate *priv;
- gdouble ra[6];
- ArtDRect rect;
+ cairo_matrix_t i2c;
+ double x1, x2, y1, y2;
item = GNOME_CANVAS_ITEM (gcp);
priv = gcp->priv;
@@ -550,29 +221,18 @@ recompute_bounding_box (GnomeCanvasPixbuf *gcp, gdouble *i2c)
return;
}
- rect.x0 = 0.0;
- rect.x1 = gdk_pixbuf_get_width (priv->pixbuf);
-
- rect.y0 = 0.0;
- rect.y1 = gdk_pixbuf_get_height (priv->pixbuf);
-
-#ifdef GNOME_CANVAS_PIXBUF_VERBOSE
- g_print ("i2c %g %g %g %g %g %g\n", i2c[0], i2c[1], i2c[2], i2c[3], i2c[4], i2c[5]);
-#endif
- gnome_canvas_item_i2c_affine (item, i2c);
-#ifdef GNOME_CANVAS_PIXBUF_VERBOSE
- g_print ("i2c %g %g %g %g %g %g\n", i2c[0], i2c[1], i2c[2], i2c[3], i2c[4], i2c[5]);
-#endif
- compute_render_affine (gcp, ra, i2c);
-#ifdef GNOME_CANVAS_PIXBUF_VERBOSE
- g_print ("ra %g %g %g %g %g %g\n", ra[0], ra[1], ra[2], ra[3], ra[4], ra[5]);
-#endif
- art_drect_affine_transform (&rect, &rect, ra);
-
- item->x1 = floor (rect.x0);
- item->y1 = floor (rect.y0);
- item->x2 = ceil (rect.x1);
- item->y2 = ceil (rect.y1);
+ x1 = 0.0;
+ x2 = gdk_pixbuf_get_width (priv->pixbuf);
+ y1 = 0.0;
+ y2 = gdk_pixbuf_get_height (priv->pixbuf);
+
+ gnome_canvas_item_i2c_matrix (item, &i2c);
+ gnome_canvas_matrix_transform_rect (&i2c, &x1, &y1, &x2, &y2);
+
+ item->x1 = floor (x1);
+ item->y1 = floor (y1);
+ item->x2 = ceil (x2);
+ item->y2 = ceil (y2);
}
@@ -598,76 +258,13 @@ gnome_canvas_pixbuf_update (GnomeCanvasItem *item,
/* ordinary update logic */
gnome_canvas_request_redraw (
item->canvas, item->x1, item->y1, item->x2, item->y2);
- recompute_bounding_box (gcp, affine);
+ recompute_bounding_box (gcp);
gnome_canvas_request_redraw (
item->canvas, item->x1, item->y1, item->x2, item->y2);
}
-/* Rendering */
-
-/* This is private to libart, but we need it. Sigh. */
-extern void art_rgb_affine_run (gint *p_x0,
- gint *p_x1,
- gint y,
- gint src_width,
- gint src_height,
- const gdouble affine[6]);
-
-/* Fills the specified buffer with the transformed version of a pixbuf */
-static void
-transform_pixbuf (guchar *dest,
- gint x,
- gint y,
- gint width,
- gint height,
- gint rowstride,
- GdkPixbuf *pixbuf,
- gdouble *affine)
-{
- gint xx, yy;
- gdouble inv[6];
- guchar *src, *d;
- ArtPoint src_p, dest_p;
- gint run_x1, run_x2;
- gint src_x, src_y;
- gint i;
-
- art_affine_invert (inv, affine);
-
- for (yy = 0; yy < height; yy++) {
- dest_p.y = y + yy + 0.5;
-
- run_x1 = x;
- run_x2 = x + width;
- art_rgb_affine_run (&run_x1, &run_x2, yy + y,
- gdk_pixbuf_get_width (pixbuf),
- gdk_pixbuf_get_height (pixbuf),
- inv);
-
- d = dest + yy * rowstride + (run_x1 - x) * 4;
-
- for (xx = run_x1; xx < run_x2; xx++) {
- dest_p.x = xx + 0.5;
- art_affine_point (&src_p, &dest_p, inv);
- src_x = floor (src_p.x);
- src_y = floor (src_p.y);
-
- src =
- gdk_pixbuf_get_pixels (pixbuf) + src_y *
- gdk_pixbuf_get_rowstride (pixbuf) + src_x *
- gdk_pixbuf_get_n_channels (pixbuf);
-
- for (i = 0; i < gdk_pixbuf_get_n_channels (pixbuf); i++)
- *d++ = *src++;
-
- if (!gdk_pixbuf_get_has_alpha (pixbuf))
- *d++ = 255; /* opaque */
- }
- }
-}
-
/* Draw handler for the pixbuf canvas item */
static void
gnome_canvas_pixbuf_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
@@ -675,11 +272,8 @@ gnome_canvas_pixbuf_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
{
GnomeCanvasPixbuf *gcp;
GnomeCanvasPixbufPrivate *priv;
- gdouble i2c[6], render_affine[6];
- guchar *buf;
- GdkPixbuf *pixbuf;
- ArtIRect p_rect, a_rect, d_rect;
- gint w, h;
+ cairo_matrix_t matrix;
+ cairo_t *cr;
gcp = GNOME_CANVAS_PIXBUF (item);
priv = gcp->priv;
@@ -687,52 +281,16 @@ gnome_canvas_pixbuf_draw (GnomeCanvasItem *item, GdkDrawable *drawable,
if (!priv->pixbuf)
return;
- gnome_canvas_item_i2c_affine (item, i2c);
- compute_render_affine (gcp, render_affine, i2c);
-
- /* Compute the area we need to repaint */
-
- p_rect.x0 = item->x1;
- p_rect.y0 = item->y1;
- p_rect.x1 = item->x2;
- p_rect.y1 = item->y2;
-
- a_rect.x0 = x;
- a_rect.y0 = y;
- a_rect.x1 = x + width;
- a_rect.y1 = y + height;
-
- art_irect_intersect (&d_rect, &p_rect, &a_rect);
- if (art_irect_empty (&d_rect))
- return;
+ cr = gdk_cairo_create (drawable);
+ gnome_canvas_item_i2c_matrix (item, &matrix);
+ if (cairo_matrix_invert (&matrix))
+ return;
+ cairo_transform (cr, &matrix);
+
+ gdk_cairo_set_source_pixbuf (cr, priv->pixbuf, 0, 0);
+ cairo_paint (cr);
- /* Create a temporary buffer and transform the pixbuf there */
-
- w = d_rect.x1 - d_rect.x0;
- h = d_rect.y1 - d_rect.y0;
-
- buf = g_new0 (guchar, w * h * 4);
- transform_pixbuf (buf,
- d_rect.x0, d_rect.y0,
- w, h,
- w * 4,
- priv->pixbuf, render_affine);
-
- pixbuf = gdk_pixbuf_new_from_data (buf, GDK_COLORSPACE_RGB,
- TRUE,
- 8, w, h,
- w * 4,
- NULL, NULL);
-
- gdk_draw_pixbuf (drawable, NULL, pixbuf,
- 0, 0,
- d_rect.x0 - x, d_rect.y0 - y,
- w, h,
- GDK_RGB_DITHER_MAX,
- d_rect.x0, d_rect.y0);
-
- g_object_unref (pixbuf);
- g_free (buf);
+ cairo_destroy (cr);
}
@@ -747,31 +305,19 @@ gnome_canvas_pixbuf_point (GnomeCanvasItem *item,
{
GnomeCanvasPixbuf *gcp;
GnomeCanvasPixbufPrivate *priv;
- gdouble i2c[6], render_affine[6], inv[6];
- ArtPoint c, p;
- gint px, py;
- gdouble no_hit;
- guchar *src;
- GdkPixbuf *pixbuf;
+ GdkPixbuf *pixbuf;
+ int px, py;
+ guchar *src;
gcp = GNOME_CANVAS_PIXBUF (item);
priv = gcp->priv;
pixbuf = priv->pixbuf;
- no_hit = item->canvas->pixels_per_unit * 2 + 10;
-
if (!priv->pixbuf)
return NULL;
- gnome_canvas_item_i2c_affine (item, i2c);
- compute_render_affine (gcp, render_affine, i2c);
- art_affine_invert (inv, render_affine);
-
- c.x = cx;
- c.y = cy;
- art_affine_point (&p, &c, inv);
- px = p.x;
- py = p.y;
+ px = x;
+ py = y;
if (px < 0 || px >= gdk_pixbuf_get_width (pixbuf) ||
py < 0 || py >= gdk_pixbuf_get_height (pixbuf))
@@ -802,8 +348,6 @@ gnome_canvas_pixbuf_bounds (GnomeCanvasItem *item,
{
GnomeCanvasPixbuf *gcp;
GnomeCanvasPixbufPrivate *priv;
- gdouble i2c[6], viewport_affine[6];
- ArtDRect rect;
gcp = GNOME_CANVAS_PIXBUF (item);
priv = gcp->priv;
@@ -813,18 +357,8 @@ gnome_canvas_pixbuf_bounds (GnomeCanvasItem *item,
return;
}
- rect.x0 = 0.0;
- rect.x1 = gdk_pixbuf_get_width (priv->pixbuf);
-
- rect.y0 = 0.0;
- rect.y1 = gdk_pixbuf_get_height (priv->pixbuf);
-
- gnome_canvas_item_i2c_affine (item, i2c);
- compute_viewport_affine (gcp, viewport_affine, i2c);
- art_drect_affine_transform (&rect, &rect, viewport_affine);
-
- *x1 = rect.x0;
- *y1 = rect.y0;
- *x2 = rect.x1;
- *y2 = rect.y1;
+ *x1 = 0;
+ *y1 = 0;
+ *x2 = gdk_pixbuf_get_width (priv->pixbuf);
+ *y2 = gdk_pixbuf_get_height (priv->pixbuf);
}