AuroraMiddleware/gtk2
1
0
Fork 0
forked from AuroraMiddleware/gtk
Code Issues Pull Requests Projects Releases Wiki Activity

colorplane: Create background image as a texture

Browse Source 
Don't create it using Cairo.
This commit is contained in:
Benjamin Otte 2018-03-25 23:56:09 +02:00
parent 448d2502d9
commit b16ac01a03
1 changed files with 40 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
gtk/gtkcolorplane.c
View File

@ -34,7 +34,7 @@ struct _GtkColorPlanePrivate
GtkAdjustment *s_adj;
GtkAdjustment *v_adj;
cairo_surface_t *surface;
GdkTexture *texture;
GtkGesture *drag_gesture;
GtkGesture *long_press_gesture;
@ -80,13 +80,14 @@ plane_snapshot (GtkWidget *widget,
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
gtk_snapshot_append_texture (snapshot,
plane->priv->texture,
&GRAPHENE_RECT_INIT (0, 0, width, height),
"ColorPlane");
cr = gtk_snapshot_append_cairo (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height),
"ColorPlane");
cairo_set_source_surface (cr, plane->priv->surface, 0, 0);
cairo_paint (cr);
cairo_move_to (cr, 0, y + 0.5);
cairo_line_to (cr, width, y + 0.5);
@ -114,13 +115,11 @@ plane_snapshot (GtkWidget *widget,
}
static void
create_surface (GtkColorPlane *plane)
create_texture (GtkColorPlane *plane)
{
GtkWidget *widget = GTK_WIDGET (plane);
cairo_t *cr;
cairo_surface_t *surface;
GBytes *bytes;
gint width, height, stride;
cairo_surface_t *tmp;
guint red, green, blue;
guint32 *data, *p;
gdouble h, s, v;
@ -134,49 +133,43 @@ create_surface (GtkColorPlane *plane)
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
surface = gdk_surface_create_similar_surface (gtk_widget_get_surface (widget),
CAIRO_CONTENT_COLOR,
width, height);
g_clear_object (&plane->priv->texture);
if (plane->priv->surface)
cairo_surface_destroy (plane->priv->surface);
plane->priv->surface = surface;
if (width == 1 || height == 1)
return;
stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24, width);
stride = width * 4;
data = g_malloc (height * stride);
h = gtk_adjustment_get_value (plane->priv->h_adj);
sf = 1.0 / (height - 1);
vf = 1.0 / (width - 1);
for (y = 0; y < height; y++)
if (width > 1 && height > 1)
{
s = CLAMP (1.0 - y * sf, 0.0, 1.0);
p = data + y * (stride / 4);
for (x = 0; x < width; x++)
h = gtk_adjustment_get_value (plane->priv->h_adj);
sf = 1.0 / (height - 1);
vf = 1.0 / (width - 1);
for (y = 0; y < height; y++)
{
v = x * vf;
gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
red = CLAMP (r * 255, 0, 255);
green = CLAMP (g * 255, 0, 255);
blue = CLAMP (b * 255, 0, 255);
p[x] = (red << 16) | (green << 8) | blue;
s = CLAMP (1.0 - y * sf, 0.0, 1.0);
p = data + y * (stride / 4);
for (x = 0; x < width; x++)
{
v = x * vf;
gtk_hsv_to_rgb (h, s, v, &r, &g, &b);
red = CLAMP (r * 255, 0, 255);
green = CLAMP (g * 255, 0, 255);
blue = CLAMP (b * 255, 0, 255);
p[x] = (0xff << 24) | (red << 16) | (green << 8) | blue;
}
}
}
else
{
memset (data, 0, height * stride);
}
tmp = cairo_image_surface_create_for_data ((guchar *)data, CAIRO_FORMAT_RGB24,
width, height, stride);
cr = cairo_create (surface);
cairo_set_source_surface (cr, tmp, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (tmp);
g_free (data);
bytes = g_bytes_new_take (data, height * stride);
plane->priv->texture = gdk_memory_texture_new (width, height,
GDK_MEMORY_DEFAULT,
bytes,
stride);
g_bytes_unref (bytes);
}
static void
@ -187,7 +180,7 @@ plane_size_allocate (GtkWidget *widget,
{
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
create_surface (plane);
create_texture (plane);
}
static void
@ -195,7 +188,7 @@ plane_realize (GtkWidget *widget)
{
GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->realize (widget);
create_surface (GTK_COLOR_PLANE (widget));
create_texture (GTK_COLOR_PLANE (widget));
}
static void
@ -204,7 +197,7 @@ plane_unrealize (GtkWidget *widget)
GtkColorPlane *plane = GTK_COLOR_PLANE (widget);
GtkColorPlanePrivate *priv = gtk_color_plane_get_instance_private (plane);
g_clear_pointer (&priv->surface, cairo_surface_destroy);
g_clear_object (&priv->texture);
GTK_WIDGET_CLASS (gtk_color_plane_parent_class)->unrealize (widget);
}
@ -222,7 +215,7 @@ set_cross_cursor (GtkWidget *widget,
static void
h_changed (GtkColorPlane *plane)
{
create_surface (plane);
create_texture (plane);
gtk_widget_queue_draw (GTK_WIDGET (plane));
}
@ -439,8 +432,7 @@ plane_finalize (GObject *object)
{
GtkColorPlane *plane = GTK_COLOR_PLANE (object);
if (plane->priv->surface)
cairo_surface_destroy (plane->priv->surface);
g_clear_object (&plane->priv->texture);
g_clear_object (&plane->priv->h_adj);
g_clear_object (&plane->priv->s_adj);