本文整理汇总了C++中cairo_destroy函数的典型用法代码示例。如果您正苦于以下问题：C++ cairo_destroy函数的具体用法？C++ cairo_destroy怎么用？C++ cairo_destroy使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了cairo_destroy函数的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: cairo_destroy
bool
TextPainter::prepareBuffer() {
if (_cairoWidth <= 0 || _cairoHeight <= 0)
return false;
if (_context)
cairo_destroy(_context);
if (_surface)
cairo_surface_destroy(_surface);
// ensure a valid opengl context
OpenGl::Guard guard;
// bind buffer for writing
glCheck(glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, _buf));
// discard previous buffer (so we don't have to wait for GPU until we can
// map) and create new buffer
glCheck(glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, _cairoWidth*_cairoHeight*sizeof(cairo_pixel_t), 0, GL_DYNAMIC_DRAW));
// bind buffer for reading
glCheck(glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, _buf));
LOG_ALL(textpainterlog) << "determine raster position of "
<< _glRoi.minX + 1.0/_lastResolution.x << ", "
<< _glRoi.maxY - 1.0/_lastResolution.y << " [gl]" << std::endl;
// get the window coordinates of the lower-left corner of the rectangle we
// want to draw to
int r[4];
glCheck(glRasterPos2f(_glRoi.minX + 1.0/_lastResolution.x, _glRoi.maxY - 1.0/_lastResolution.y));
glCheck(glGetIntegerv(GL_CURRENT_RASTER_POSITION, r));
_rasterPos.x = r[0];
_rasterPos.y = r[1];
LOG_ALL(textpainterlog) << "read content from raster position " << _rasterPos << std::endl;
// load current content to buffer
glCheck(glReadPixels(
_rasterPos.x,
_rasterPos.y,
_cairoWidth,
_cairoHeight,
detail::pixel_format_traits<cairo_pixel_t>::gl_format,
detail::pixel_format_traits<cairo_pixel_t>::gl_type,
0));
// map the pixel buffer object
unsigned char* p = (unsigned char*)glMapBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, GL_WRITE_ONLY_ARB);
// wrap the buffer in a cairo surface
_surface =
cairo_image_surface_create_for_data(
p,
CAIRO_FORMAT_ARGB32,
_cairoWidth,
_cairoHeight,
cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, _cairoWidth));
// create a context for the surface
_context = cairo_create(_surface);
// set antialiasing options
cairo_set_font_options(_context, _fontOptions);
return true;
}示例2: on_expose_event
static gboolean
on_expose_event (GtkWidget * widget, GdkEventExpose * event, gpointer *project)
{
cairo_t *cr;
GdkWindow *gdkw;
gint i;
gdkw = gtk_layout_get_bin_window (GTK_LAYOUT(widget));
cr = gdk_cairo_create (gdkw);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1);
if(!layoutexp)
{
for(i=0;i<=MAXLEN12;i++)
{
if(pertchart[i].name != NULL)
{
drawbutton(widget,pertchart[i].name,pertchart[i].x,pertchart[i].y,pertchart[i].type,project);
}
}
for(i=0;i<Lin;i++)
{
cr = gdk_cairo_create (gdkw);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1);
cairo_move_to (cr, arrow[i].x1,arrow[i].y1);
cairo_line_to (cr, arrow[i].x2,arrow[i].y2);
cairo_move_to (cr, arrow[i].x2,arrow[i].y2);
cairo_line_to (cr, arrow[i].x3,arrow[i].y3);
cairo_move_to (cr, arrow[i].x3,arrow[i].y3);
cairo_line_to (cr, arrow[i].x4,arrow[i].y4);
cairo_stroke_preserve (cr);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_fill (cr);
cairo_destroy (cr);
}
}
else
{
for(i=0;i<Lin;i++)
{
cr = gdk_cairo_create (gdkw);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1);
cairo_move_to (cr, arrow[i].x1,arrow[i].y1);
cairo_line_to (cr, arrow[i].x2,arrow[i].y2);
cairo_move_to (cr, arrow[i].x2,arrow[i].y2);
cairo_line_to (cr, arrow[i].x3,arrow[i].y3);
cairo_move_to (cr, arrow[i].x3,arrow[i].y3);
cairo_line_to (cr, arrow[i].x4,arrow[i].y4);
cairo_stroke_preserve (cr);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_fill (cr);
cairo_destroy (cr);}
}
layoutexp++;
return FALSE;
}示例3: dt_iop_levels_expose
//.........这里部分代码省略.........
}
}
// clear bg
cairo_set_source_rgb (cr, .2, .2, .2);
cairo_paint(cr);
cairo_translate(cr, inset, inset);
width -= 2*inset;
height -= 2*inset;
cairo_set_line_width(cr, 1.0);
cairo_set_source_rgb (cr, .1, .1, .1);
cairo_rectangle(cr, 0, 0, width, height);
cairo_stroke(cr);
cairo_set_source_rgb (cr, .3, .3, .3);
cairo_rectangle(cr, 0, 0, width, height);
cairo_fill(cr);
// draw grid
cairo_set_line_width(cr, .4);
cairo_set_source_rgb (cr, .1, .1, .1);
dt_draw_vertical_lines(cr, 4, 0, 0, width, height);
// Drawing the vertical line indicators
cairo_set_line_width(cr, 2.);
for(int k = 0; k < 3; k++)
{
if(k == c->handle_move && c->mouse_x > 0)
cairo_set_source_rgb(cr, 1, 1, 1);
else
cairo_set_source_rgb(cr, .7, .7, .7);
cairo_move_to(cr, width*p->levels[k], height);
cairo_rel_line_to(cr, 0, -height);
cairo_stroke(cr);
}
// draw x positions
cairo_set_line_width(cr, 1.);
const float arrw = 7.0f;
for(int k=0; k<3; k++)
{
switch(k)
{
case 0:
cairo_set_source_rgb(cr, 0, 0, 0);
break;
case 1:
cairo_set_source_rgb(cr, 0.5, 0.5, 0.5);
break;
default:
cairo_set_source_rgb(cr, 1, 1, 1);
break;
}
cairo_move_to(cr, width*p->levels[k], height+inset-1);
cairo_rel_line_to(cr, -arrw*.5f, 0);
cairo_rel_line_to(cr, arrw*.5f, -arrw);
cairo_rel_line_to(cr, arrw*.5f, arrw);
cairo_close_path(cr);
if(c->handle_move == k && c->mouse_x > 0)
cairo_fill(cr);
else
cairo_stroke(cr);
}
cairo_translate(cr, 0, height);
// draw lum histogram in background
// only if the module is enabled
if (self->enabled)
{
dt_develop_t *dev = darktable.develop;
float *hist, hist_max;
hist = self->histogram;
hist_max = dev->histogram_linear?self->histogram_max[0]:logf(1.0 + self->histogram_max[0]);
if(hist && hist_max > 0)
{
cairo_save(cr);
cairo_scale(cr, width/63.0, -(height-5)/(float)hist_max);
cairo_set_source_rgba(cr, .2, .2, .2, 0.5);
dt_draw_histogram_8(cr, hist, 0);
cairo_restore(cr);
}
}
// Cleaning up
cairo_destroy(cr);
cairo_t *cr_pixmap = gdk_cairo_create(gtk_widget_get_window(widget));
cairo_set_source_surface (cr_pixmap, cst, 0, 0);
cairo_paint(cr_pixmap);
cairo_destroy(cr_pixmap);
cairo_surface_destroy(cst);
return TRUE;
}示例4: SetIconText
SetIconText(GtkStatusIcon *tray_icon, const char *text, const char *color) {
// build background from image
GdkPixbuf* special_icon = gdk_pixbuf_new_from_file("message-mail-new.png", NULL); // GError **error);
GdkPixbuf *dest = gdk_pixbuf_copy(special_icon);
int w=gdk_pixbuf_get_width(special_icon);
int h=gdk_pixbuf_get_height(special_icon);
// prepare colors/alpha
GdkColormap* cmap=gdk_screen_get_system_colormap(gdk_screen_get_default());
int screen_depth=24;
GdkVisual* visual = gdk_colormap_get_visual(cmap);
screen_depth = visual->depth;
GdkColor fore = { 0, 0, 0, 0 };
GdkColor alpha = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF};
gdk_color_parse(color, &fore);
if(fore.red==alpha.red && fore.green==alpha.green && fore.blue==alpha.blue) {
alpha.red=0; // make sure alpha is different from fore
}
gdk_colormap_alloc_color (cmap, &fore, TRUE, TRUE);
gdk_colormap_alloc_color (cmap, &alpha, TRUE, TRUE);
// build pixmap with rectangle
GdkPixmap *pm = gdk_pixmap_new (NULL, w, h, screen_depth);
cairo_t *cr = gdk_cairo_create(pm);
gdk_cairo_set_source_color(cr, &alpha);
/* void gdk_cairo_set_source_color (cairo_t *cr, */
/* const GdkColor *color); */
cairo_rectangle(cr, 0, 0, w, h);
/* void cairo_rectangle (cairo_t *cr, */
/* double x, */
/* double y, */
/* double width, */
/* double height); */
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
// build text
GtkWidget *scratch = gtk_window_new(GTK_WINDOW_TOPLEVEL);
PangoLayout *layout = gtk_widget_create_pango_layout(scratch, NULL);
gtk_widget_destroy(scratch);
PangoFontDescription *fnt = pango_font_description_from_string("Sans 18");
pango_font_description_set_weight (fnt,PANGO_WEIGHT_SEMIBOLD);
pango_layout_set_spacing (layout,0);
pango_layout_set_font_description (layout, fnt);
pango_layout_set_text (layout, (gchar *)text,-1);
int tw=0;
int th=0;
int sz;
int border=4;
pango_layout_get_pixel_size(layout, &tw, &th);
while( (tw>w - border || th > h - border)) //fit text to the icon by decreasing font size
{
sz=pango_font_description_get_size (fnt);
if(sz<MIN_FONT_SIZE) {
sz=MIN_FONT_SIZE;
break;
}
sz-=PANGO_SCALE;
pango_font_description_set_size (fnt,sz);
pango_layout_set_font_description (layout, fnt);
pango_layout_get_pixel_size(layout, &tw, &th);
}
pango_font_description_free (fnt);
// center text
int px, py;
px=(w-tw)/2;
py=(h-th)/2;
// draw text on pixmap
gdk_cairo_set_source_color(cr, &fore);
cairo_move_to (cr, px, py);
pango_cairo_show_layout (cr, layout);
cairo_destroy(cr);
g_object_unref (layout);
GdkPixbuf *buf = gdk_pixbuf_get_from_drawable (NULL, pm, NULL, 0, 0, 0, 0, w, h);
g_object_unref (pm);
GdkPixbuf *alpha_buf = gdk_pixbuf_add_alpha(buf, TRUE, (guchar)alpha.red, (guchar)alpha.green, (guchar)alpha.blue);
g_object_unref (buf);
//merge the rendered text on top
gdk_pixbuf_composite(alpha_buf,dest,0,0,w,h,0,0,1,1,GDK_INTERP_NEAREST,255);
g_object_unref(alpha_buf);
/* gdk_pixbuf_composite(buf,dest,0,0,w,h,0,0,1,1,GDK_INTERP_NEAREST,255); */
/* g_object_unref(buf); */
gtk_status_icon_set_from_pixbuf(GTK_STATUS_ICON(tray_icon), GDK_PIXBUF(dest));
}示例5: render
//.........这里部分代码省略.........
cairo_fill_preserve (cr);
cairo_set_source_rgba (cr, 0, 0, 0, 0.7);
cairo_stroke (cr);
// Draw internal highlight
cairo_set_source_rgba (cr, 1, 1, 1, 0.45);
cairo_set_line_width (cr, 1);
if (color_button->priv->fraction < 0.03) {
cairo_arc (cr, (width / 2) + .5, (height / 2) + .5, 3.25,
0, 2 * G_PI);
} else if (color_button->priv->fraction > 0.99) {
cairo_arc (cr, (width / 2) + .5, (height / 2) + .5, radius - 3.5,
0, 2 * G_PI);
} else {
cairo_arc_negative (cr, (width / 2) + .5, (height / 2) + .5, radius - 3.5,
arc_start + (1 / (radius - 3.75)),
arc_end - (1 / (radius - 3.75)));
cairo_arc_negative (cr, (width / 2) + .5, (height / 2) + .5, 3.25,
arc_end - (1 / (radius - 3.75)),
arc_start + (1 / (radius - 3.75)));
cairo_arc_negative (cr, (width / 2) + .5, (height / 2) + .5, radius - 3.5,
arc_start + (1 / (radius - 3.75)),
arc_start + (1 / (radius - 3.75)));
}
cairo_stroke (cr);
// Draw external shape
cairo_set_line_width (cr, 1);
cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
cairo_arc (cr, (width / 2) + .5, (height / 2) + .5, radius - 1.25, 0,
G_PI * 2);
cairo_stroke (cr);
break;
case GSMCP_TYPE_NETWORK_IN:
if (color_button->priv->image_buffer == NULL)
color_button->priv->image_buffer =
fill_image_buffer_from_file (cr, DATADIR "/pixmaps/mate-system-monitor/download.svg");
gtk_widget_set_size_request (widget, 32, 32);
cairo_move_to (cr, 8.5, 1.5);
cairo_line_to (cr, 23.5, 1.5);
cairo_line_to (cr, 23.5, 11.5);
cairo_line_to (cr, 29.5, 11.5);
cairo_line_to (cr, 16.5, 27.5);
cairo_line_to (cr, 15.5, 27.5);
cairo_line_to (cr, 2.5, 11.5);
cairo_line_to (cr, 8.5, 11.5);
cairo_line_to (cr, 8.5, 1.5);
cairo_close_path (cr);
path = cairo_copy_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
cairo_set_line_width (cr, 1);
cairo_fill_preserve (cr);
cairo_set_miter_limit (cr, 5.0);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0, 0, 0, 0.5);
cairo_append_path (cr, path);
cairo_path_destroy(path);
cairo_stroke (cr);
cairo_set_source_surface (cr, color_button->priv->image_buffer, 0.0,
0.0);
cairo_paint (cr);
break;
case GSMCP_TYPE_NETWORK_OUT:
if (color_button->priv->image_buffer == NULL)
color_button->priv->image_buffer =
fill_image_buffer_from_file (cr, DATADIR "/pixmaps/mate-system-monitor/upload.svg");
gtk_widget_set_size_request (widget, 32, 32);
cairo_move_to (cr, 16.5, 1.5);
cairo_line_to (cr, 29.5, 17.5);
cairo_line_to (cr, 23.5, 17.5);
cairo_line_to (cr, 23.5, 27.5);
cairo_line_to (cr, 8.5, 27.5);
cairo_line_to (cr, 8.5, 17.5);
cairo_line_to (cr, 2.5, 17.5);
cairo_line_to (cr, 15.5, 1.5);
cairo_line_to (cr, 16.5, 1.5);
cairo_close_path (cr);
path = cairo_copy_path (cr);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_MITER);
cairo_set_line_width (cr, 1);
cairo_fill_preserve (cr);
cairo_set_miter_limit (cr, 5.0);
cairo_stroke (cr);
cairo_set_source_rgba (cr, 0, 0, 0, 0.5);
cairo_append_path (cr, path);
cairo_path_destroy(path);
cairo_stroke (cr);
cairo_set_source_surface (cr, color_button->priv->image_buffer, 0.0,
0.0);
cairo_paint (cr);
break;
}
cairo_destroy (cr);
}示例6: setup_tile
//.........这里部分代码省略.........
raico_blur_t* blur = NULL;
cr_surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
3 * BUBBLE_SHADOW_SIZE,
3 * BUBBLE_SHADOW_SIZE);
status = cairo_surface_status (cr_surf);
if (status != CAIRO_STATUS_SUCCESS)
g_print ("Error: \"%s\"\n", cairo_status_to_string (status));
cr = cairo_create (cr_surf);
status = cairo_status (cr);
if (status != CAIRO_STATUS_SUCCESS)
{
cairo_surface_destroy (cr_surf);
g_print ("Error: \"%s\"\n", cairo_status_to_string (status));
}
// clear and render drop-shadow and bubble-background
cairo_scale (cr, 1.0f, 1.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
if (g_composited)
{
draw_shadow (cr,
width,
height,
BUBBLE_SHADOW_SIZE,
CORNER_RADIUS);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
draw_round_rect (cr,
1.0f,
(gdouble) BUBBLE_SHADOW_SIZE,
(gdouble) BUBBLE_SHADOW_SIZE,
(gdouble) CORNER_RADIUS,
(gdouble) (width - 2.0f * BUBBLE_SHADOW_SIZE),
(gdouble) (height - 2.0f* BUBBLE_SHADOW_SIZE));
cairo_fill (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgba (cr,
BUBBLE_BG_COLOR_R,
BUBBLE_BG_COLOR_G,
BUBBLE_BG_COLOR_B,
0.95f);
}
else
cairo_set_source_rgb (cr,
BUBBLE_BG_COLOR_R,
BUBBLE_BG_COLOR_G,
BUBBLE_BG_COLOR_B);
draw_round_rect (cr,
1.0f,
BUBBLE_SHADOW_SIZE,
BUBBLE_SHADOW_SIZE,
CORNER_RADIUS,
(gdouble) (width - 2.0f * BUBBLE_SHADOW_SIZE),
(gdouble) (height - 2.0f * BUBBLE_SHADOW_SIZE));
cairo_fill (cr);
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (cr_surf),
cairo_image_surface_get_format (cr_surf),
3 * BUBBLE_SHADOW_SIZE,
3 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (cr_surf));
dummy_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (dummy_surf),
cairo_image_surface_get_format (dummy_surf),
2 * BUBBLE_SHADOW_SIZE,
2 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (dummy_surf));
norm_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
blur = raico_blur_create (RAICO_BLUR_QUALITY_LOW);
raico_blur_set_radius (blur, 6);
raico_blur_apply (blur, dummy_surf);
raico_blur_destroy (blur);
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (dummy_surf),
cairo_image_surface_get_format (dummy_surf),
2 * BUBBLE_SHADOW_SIZE,
2 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (dummy_surf));
blur_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
cairo_surface_destroy (dummy_surf);
g_tile = tile_new_for_padding (norm_surf, blur_surf);
cairo_surface_destroy (norm_surf);
cairo_surface_destroy (blur_surf);
cairo_surface_destroy (cr_surf);
cairo_destroy (cr);
}示例7: conting_cs_draw
static void
conting_cs_draw(ContingDrawing *self, cairo_t *cr)
{
ContingSymbol *symb;
ContingComponent *comp;
GdkColor *color;
ArtPoint pw0, pw1;
GdkRectangle rect;
gdouble affine[6];
g_return_if_fail(self != NULL && CONTING_IS_CS(self));
symb = CONTING_SYMBOL(self);
comp = CONTING_COMPONENT(self);
g_object_get(self, "color", &color, NULL);
pw0 = comp->p0;
pw1 = comp->p1;
rect.x = (pw0.x < pw1.x ? pw0.x : pw1.x);
rect.y = (pw0.y < pw1.y ? pw0.y : pw1.y);
rect.width = fabs(pw1.x - pw0.x);
rect.height = fabs(pw1.y - pw0.y);
cairo_set_antialias(cr, CAIRO_ANTIALIAS_DEFAULT);
cairo_arc(cr,
rect.x + ((gdouble) rect.width / 2.0),
rect.y + ((gdouble) rect.height / 2.0),
(gdouble) rect.width / 2.0, 0, 2 * M_PI);
cairo_set_source_rgb(cr,
(gdouble) color->red / (gdouble) G_MAXUINT16,
(gdouble) color->green / (gdouble) G_MAXUINT16,
(gdouble) color->blue / (gdouble) G_MAXUINT16);
cairo_stroke(cr);
cr = conting_drawing_get_cairo_absolute(self);
conting_drawing_get_i2w_affine_absolute(self, affine);
cairo_transform(cr, (cairo_matrix_t *) affine);
cairo_set_antialias(cr, CAIRO_ANTIALIAS_DEFAULT);
cairo_set_source_rgb(cr,
(gdouble) color->red / (gdouble) G_MAXUINT16,
(gdouble) color->green / (gdouble) G_MAXUINT16,
(gdouble) color->blue / (gdouble) G_MAXUINT16);
{
PangoLayout *layout;
PangoFontDescription *font;
layout = pango_cairo_create_layout(cr);
font = pango_font_description_new();
pango_font_description_set_size(font, 4 * PANGO_SCALE);
/* g_print("size = %d\n", pango_font_description_get_size(font)); */
pango_font_description_set_family_static(font, "Arial");
pango_font_description_set_style(font, PANGO_STYLE_NORMAL);
pango_layout_set_font_description(layout, font);
pango_layout_set_text(layout, "CS", 2);
cairo_move_to(cr, pw0.x + 1, pw0.y + 2);
pango_cairo_update_layout(cr, layout);
pango_cairo_show_layout(cr, layout);
g_object_unref(layout);
}
cairo_stroke(cr);
cairo_destroy(cr);
CONTING_DRAWING_CLASS(parent_class)->draw(self, cr);
}示例8: render_text_to_surface
cairo_surface_t*
render_text_to_surface (gchar* text,
gint width,
gint height,
const cairo_font_options_t* font_opts,
gdouble dpi)
{
cairo_surface_t* surface;
cairo_t* cr;
PangoFontDescription* desc;
PangoLayout* layout;
// sanity check
if (!text ||
width <= 0 ||
height <= 0)
return NULL;
// create surface
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width,
height);
if (cairo_surface_status (surface) != CAIRO_STATUS_SUCCESS)
return NULL;
// create context
cr = cairo_create (surface);
if (cairo_status (cr) != CAIRO_STATUS_SUCCESS)
{
cairo_surface_destroy (surface);
return NULL;
}
// clear context
cairo_scale (cr, 1.0f, 1.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
//
layout = pango_cairo_create_layout (cr);
desc = pango_font_description_new ();
pango_font_description_set_size (desc, 12 * PANGO_SCALE);
pango_font_description_set_family_static (desc, "Candara");
pango_font_description_set_weight (desc, PANGO_WEIGHT_NORMAL);
pango_font_description_set_style (desc, PANGO_STYLE_NORMAL);
pango_layout_set_wrap (layout, PANGO_WRAP_WORD);
pango_layout_set_font_description (layout, desc);
pango_font_description_free (desc);
pango_layout_set_width (layout, width * PANGO_SCALE);
pango_layout_set_height (layout, height * PANGO_SCALE);
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_set_ellipsize (layout, PANGO_ELLIPSIZE_END);
// print and layout string (pango-wise)
pango_layout_set_text (layout, text, -1);
// make sure system-wide font-options like hinting, antialiasing etc.
// are taken into account
pango_cairo_context_set_font_options (pango_layout_get_context (layout),
font_opts);
pango_cairo_context_set_resolution (pango_layout_get_context (layout),
dpi);
pango_layout_context_changed (layout);
// draw pango-text to our cairo-context
cairo_move_to (cr, 0.0f, 0.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgba (cr, 1.0f, 1.0f, 1.0f, 1.0f);
// this call leaks 3803 bytes, I've no idea how to fix that
pango_cairo_show_layout (cr, layout);
// clean up
g_object_unref (layout);
cairo_destroy (cr);
return surface;
}示例9: setup_text_tile
tile_t*
setup_text_tile (const cairo_font_options_t* font_opts,
gdouble dpi,
gint w,
gint h)
{
tile_t* tile = NULL;
cairo_status_t status;
cairo_surface_t* surface = NULL;
cairo_surface_t* text = NULL;
cairo_surface_t* shadow = NULL;
cairo_t* cr;
gdouble width = (gdouble) w;
gdouble height = (gdouble) h;
raico_blur_t* blur = NULL;
cairo_pattern_t* pattern = NULL;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
status = cairo_surface_status (surface);
if (status != CAIRO_STATUS_SUCCESS)
g_print ("Error: \"%s\"\n", cairo_status_to_string (status));
cr = cairo_create (surface);
status = cairo_status (cr);
if (status != CAIRO_STATUS_SUCCESS)
{
cairo_surface_destroy (surface);
g_print ("Error: \"%s\"\n", cairo_status_to_string (status));
}
// clear and render drop-shadow and bubble-background
cairo_scale (cr, 1.0f, 1.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
text = render_text_to_surface (
"After an evening of hacking at the"
" Fataga hotel here at GUADEC I "
"can present you even text-scroll "
"with blur-cache and fade-out mask"
" and I dedicate this to Behdad who"
" sadly burst his upper lip during "
"the evening and had to go to the "
"hospital. Some spanish KDE-folks "
"kindly accompanied him to help out"
" with translation. True collaboration!\0",
width,
height,
font_opts,
dpi);
shadow = render_text_to_surface (
"After an evening of hacking at the"
" Fataga hotel here at GUADEC I "
"can present you even text-scroll "
"with blur-cache and fade-out mask"
" and I dedicate this to Behdad who"
" sadly burst his upper lip during "
"the evening and had to go to the "
"hospital. Some spanish KDE-folks "
"kindly accompanied him to help out"
" with translation. True collaboration!\0",
width,
height,
font_opts,
dpi);
// create and setup blur
blur = raico_blur_create (RAICO_BLUR_QUALITY_LOW);
raico_blur_set_radius (blur, 4);
// now blur it
raico_blur_apply (blur, shadow);
// blur no longer needed
raico_blur_destroy (blur);
cairo_push_group (cr);
cairo_set_source_surface (cr,
shadow,
0.0f,
0.0f);
cairo_paint (cr);
pattern = cairo_pop_group (cr);
cairo_set_source_rgba (cr, 0.0f, 0.0f, 0.0f, 1.0f);
cairo_mask (cr, pattern);
cairo_surface_destroy (shadow);
cairo_pattern_destroy (pattern);
cairo_set_source_surface (cr, text, 0.0f, 0.0f);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_destroy (text);
tile = tile_new (surface, 6);
cairo_surface_destroy (surface);
return tile;
}示例10: sctp_graph_draw
static void sctp_graph_draw(struct sctp_udata *u_data)
{
int length, lwidth;
guint32 distance=5, i, e, sec, w, start, a, j, b;
gint label_width, label_height;
char label_string[15];
gfloat dis;
gboolean write_label = FALSE;
PangoLayout *layout;
GtkAllocation widget_alloc;
cairo_t *cr;
if (u_data->io->x1_tmp_sec == 0 && u_data->io->x1_tmp_usec == 0)
u_data->io->offset = 0;
else
u_data->io->offset = 5;
if (u_data->io->x2_tmp_sec - u_data->io->x1_tmp_sec > 1500)
{
u_data->io->min_x=u_data->io->x1_tmp_sec;
u_data->io->max_x=u_data->io->x2_tmp_sec;
u_data->io->uoff = TRUE;
}
else
{
u_data->io->min_x=((guint32) (u_data->io->x1_tmp_sec*1000000.0))+u_data->io->x1_tmp_usec;
u_data->io->max_x=((guint32) (u_data->io->x2_tmp_sec*1000000.0))+u_data->io->x2_tmp_usec;
u_data->io->uoff = FALSE;
}
u_data->io->tmp_width = u_data->io->max_x - u_data->io->min_x;
if (u_data->dir == 1)
{
if (u_data->io->tmp == FALSE)
{
if (u_data->assoc->sort_tsn1 != NULL)
u_data->io->max_y = u_data->io->tmp_max_tsn1 - u_data->io->tmp_min_tsn1;
else
u_data->io->max_y = 0;
u_data->io->min_y = 0;
}
else
{
u_data->io->max_y = u_data->io->tmp_max_tsn1;
u_data->io->min_y = u_data->io->tmp_min_tsn1;
}
}
else if (u_data->dir == 2)
{
if (u_data->io->tmp == FALSE)
{
if (u_data->assoc->tsn2 != NULL)
u_data->io->max_y = u_data->io->tmp_max_tsn2 - u_data->io->tmp_min_tsn2;
else
u_data->io->max_y = 0;
u_data->io->min_y = 0;
}
else
{
u_data->io->max_y = u_data->io->tmp_max_tsn2;
u_data->io->min_y = u_data->io->tmp_min_tsn2;
}
}
#if GTK_CHECK_VERSION(2,22,0)
cr = cairo_create (u_data->io->surface);
#else
cr = gdk_cairo_create (u_data->io->pixmap);
#endif
cairo_set_source_rgb (cr, 1, 1, 1);
gtk_widget_get_allocation(u_data->io->draw_area, &widget_alloc);
cairo_rectangle (cr,
0,
0,
widget_alloc.width,
widget_alloc.height);
cairo_fill (cr);
cairo_destroy (cr);
/* x_axis */
#if GTK_CHECK_VERSION(2,22,0)
cr = cairo_create (u_data->io->surface);
#else
cr = gdk_cairo_create (u_data->io->pixmap);
#endif
cairo_set_line_width (cr, 1.0);
cairo_move_to(cr, LEFT_BORDER+u_data->io->offset+0.5, u_data->io->surface_height - BOTTOM_BORDER+0.5);
cairo_line_to(cr, u_data->io->surface_width - RIGHT_BORDER + u_data->io->offset+0.5, u_data->io->surface_height - BOTTOM_BORDER+0.5);
cairo_move_to(cr, u_data->io->surface_width - RIGHT_BORDER + u_data->io->offset+0.5, u_data->io->surface_height - BOTTOM_BORDER+0.5);
cairo_line_to(cr, u_data->io->surface_width - RIGHT_BORDER + u_data->io->offset - 5+0.5, u_data->io->surface_height - BOTTOM_BORDER - 5+0.5);
cairo_move_to(cr, u_data->io->surface_width - RIGHT_BORDER + u_data->io->offset + 0.5, u_data->io->surface_height - BOTTOM_BORDER + 0.5);
cairo_line_to(cr, u_data->io->surface_width - RIGHT_BORDER + u_data->io->offset - 5.5, u_data->io->surface_height - BOTTOM_BORDER + 5.5);
cairo_stroke(cr);
cairo_destroy(cr);
u_data->io->axis_width = u_data->io->surface_width - LEFT_BORDER - RIGHT_BORDER - u_data->io->offset;
//.........这里部分代码省略.........
示例11: paint_background
static void paint_background() {
cr = cairo_create(surface);
cairo_set_source_rgb(cr, 0.0, 0.8, 0.0);
cairo_paint(cr);
cairo_destroy(cr);
}示例12: draw_tsn_graph
static void draw_tsn_graph(struct sctp_udata *u_data)
{
GPtrArray *array = NULL;
guint32 i, size = 0, start, end;
gint diff, width;
cairo_t *cr;
if (u_data->dir == 1)
{
array = u_data->assoc->sort_tsn1;
size = u_data->assoc->n_data_chunks_ep1;
if (u_data->io->tmp == FALSE)
{
min_tsn = 0;
max_tsn = u_data->assoc->max_bytes1;
}
else
{
min_tsn = u_data->io->tmp_min_tsn1;
max_tsn = u_data->io->tmp_max_tsn1;
}
}
else if (u_data->dir == 2)
{
array = u_data->assoc->sort_tsn2;
size = u_data->assoc->n_data_chunks_ep2;
if (u_data->io->tmp == FALSE)
{
min_tsn = 0;
max_tsn = u_data->assoc->max_bytes2;
}
else
{
min_tsn = u_data->io->tmp_min_tsn2;
max_tsn = u_data->io->tmp_max_tsn2;
}
}
width = u_data->io->max_x - u_data->io->min_x;
for (i=0; i<size; i++)
{
if (u_data->io->uoff)
diff = (gint)((struct tsn_sort*)(g_ptr_array_index(array, i)))->secs -u_data->io->min_x;
else
diff = (gint)((struct tsn_sort*)(g_ptr_array_index(array, i)))->secs*1000000 + ((struct tsn_sort*)(g_ptr_array_index(array, i)))->usecs-u_data->io->min_x;
start = ((struct tsn_sort*)(g_ptr_array_index(array, i)))->offset;
end = start + ((struct tsn_sort*)(g_ptr_array_index(array, i)))->length;
if (start >= min_tsn && diff > 0 && diff <= width){
#if GTK_CHECK_VERSION(2,22,0)
cr = cairo_create (u_data->io->surface);
#else
cr = gdk_cairo_create (u_data->io->pixmap);
#endif
cairo_set_line_width (cr, 1.0);
cairo_move_to(cr,
(LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff)+0.5,
(u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(start,min_tsn))*u_data->io->y_interval))+0.5);
cairo_line_to(cr,
(LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff)+0.5,
(u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(end,min_tsn))*u_data->io->y_interval))+0.5);
cairo_stroke(cr);
cairo_destroy(cr);
}
}
}示例13: draw_sack_graph
static void draw_sack_graph(struct sctp_udata *u_data)
{
GdkRGBA red_color = {1.0, 0.0, 0.0, 1.0};
GdkRGBA green_color = {0.0, 1.0, 0.0, 1.0};
gint diff;
GPtrArray *array = NULL;
guint32 i, size = 0, start=0, end;
gboolean more = FALSE;
gint width;
cairo_t *cr;
if (u_data->dir == 1)
{
array = u_data->assoc->sort_sack1;
size=u_data->assoc->n_sack_chunks_ep1;
if (u_data->io->tmp == FALSE)
{
min_tsn = 0;
max_tsn = u_data->assoc->max_bytes1;
}
else
{
min_tsn = u_data->io->tmp_min_tsn1;
max_tsn = u_data->io->tmp_max_tsn1;
}
}
else if (u_data->dir == 2)
{
array = u_data->assoc->sort_sack2;
size = u_data->assoc->n_sack_chunks_ep2;
if (u_data->io->tmp == FALSE)
{
min_tsn = 0;
max_tsn = u_data->assoc->max_bytes2;
}
else
{
min_tsn = u_data->io->tmp_min_tsn2;
max_tsn = u_data->io->tmp_max_tsn2;
}
}
width = u_data->io->max_x - u_data->io->min_x;
for (i=0; i<size; i++)
{
if (u_data->io->uoff)
diff = (gint)((struct tsn_sort*)(g_ptr_array_index(array, i)))->secs - u_data->io->min_x;
else
diff = (gint)((struct tsn_sort*)(g_ptr_array_index(array, i)))->secs * 1000000 + ((struct tsn_sort*)(g_ptr_array_index(array, i)))->usecs - u_data->io->min_x;
end = start + ((struct tsn_sort*)(g_ptr_array_index(array, i)))->length;
if (end>max_tsn)
{
end = max_tsn;
more = TRUE;
}
if (start >= min_tsn && diff > 0 && diff <= width)
{
#if GTK_CHECK_VERSION(2,22,0)
cr = cairo_create (u_data->io->surface);
#else
cr = gdk_cairo_create (u_data->io->pixmap);
#endif
gdk_cairo_set_source_rgba (cr, &red_color);
cairo_set_line_width (cr, 1.0);
cairo_move_to(cr,
LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff+0.5,
u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(start,min_tsn))*u_data->io->y_interval)+0.5);
cairo_line_to(cr,
LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff+0.5,
u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(end,min_tsn))*u_data->io->y_interval)+0.5);
cairo_stroke(cr);
cairo_destroy(cr);
if (more == TRUE)
{
#if GTK_CHECK_VERSION(2,22,0)
cr = cairo_create (u_data->io->surface);
#else
cr = gdk_cairo_create (u_data->io->pixmap);
#endif
gdk_cairo_set_source_rgba (cr, &green_color);
cairo_set_line_width (cr, 1.0);
cairo_move_to(cr,
LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff+0.5,
u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(end,min_tsn))*u_data->io->y_interval)+0.5);
cairo_line_to(cr,
LEFT_BORDER+u_data->io->offset+u_data->io->x_interval*diff,
u_data->io->surface_height-BOTTOM_BORDER-u_data->io->offset-((SUB_32(end+10,min_tsn))*u_data->io->y_interval)+0.5);
cairo_stroke(cr);
cairo_destroy(cr);
more = FALSE;
}
}
}
}示例14: Close_Graphics
void Close_Graphics(cairo_t *cr)
{
cairo_destroy(cr);
}示例15: setup_tile
//.........这里部分代码省略.........
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
draw_round_rect (cr,
1.0f,
(gdouble) BUBBLE_SHADOW_SIZE,
(gdouble) BUBBLE_SHADOW_SIZE,
(gdouble) CORNER_RADIUS,
(gdouble) (width - 2.0f * BUBBLE_SHADOW_SIZE),
(gdouble) (height - 2.0f* BUBBLE_SHADOW_SIZE));
cairo_fill (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_set_source_rgba (cr,
BUBBLE_BG_COLOR_R,
BUBBLE_BG_COLOR_G,
BUBBLE_BG_COLOR_B,
0.95f);
}
else
cairo_set_source_rgb (cr,
BUBBLE_BG_COLOR_R,
BUBBLE_BG_COLOR_G,
BUBBLE_BG_COLOR_B);
draw_round_rect (cr,
1.0f,
BUBBLE_SHADOW_SIZE,
BUBBLE_SHADOW_SIZE,
CORNER_RADIUS,
(gdouble) (width - 2.0f * BUBBLE_SHADOW_SIZE),
(gdouble) (height - 2.0f * BUBBLE_SHADOW_SIZE));
cairo_fill (cr);
// create tmp. copy of scratch-surface
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (cr_surf),
cairo_image_surface_get_format (cr_surf),
3 * BUBBLE_SHADOW_SIZE,
3 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (cr_surf));
dummy_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
// create normal-state surface for tile from copy of scratch-surface
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (dummy_surf),
cairo_image_surface_get_format (dummy_surf),
2 * BUBBLE_SHADOW_SIZE,
2 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (dummy_surf));
norm_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
// blur tmp. copy of scratch-surface
blur = raico_blur_create (RAICO_BLUR_QUALITY_LOW);
raico_blur_set_radius (blur, 6);
raico_blur_apply (blur, dummy_surf);
raico_blur_destroy (blur);
// create blurred-state surface for tile
tmp = cairo_image_surface_create_for_data (
cairo_image_surface_get_data (dummy_surf),
cairo_image_surface_get_format (dummy_surf),
2 * BUBBLE_SHADOW_SIZE,
2 * BUBBLE_SHADOW_SIZE,
cairo_image_surface_get_stride (dummy_surf));
blur_surf = copy_surface (tmp);
cairo_surface_destroy (tmp);
// actually create the tile with padding in mind
tile = tile_new_for_padding (norm_surf, blur_surf);
destroy_cloned_surface (norm_surf);
destroy_cloned_surface (blur_surf);
destroy_cloned_surface (dummy_surf);
cairo_destroy (cr);
cairo_surface_destroy (cr_surf);
norm_surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
cr = cairo_create (norm_surf);
cairo_scale (cr, 1.0f, 1.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
tile_paint_with_padding (tile, cr, 0.0f, 0.0f, w, h, 1.0f, 0.0f);
cairo_destroy (cr);
blur_surf = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
cr = cairo_create (blur_surf);
cairo_scale (cr, 1.0f, 1.0f);
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
tile_paint_with_padding (tile, cr, 0.0f, 0.0f, w, h, 0.0f, 1.0f);
cairo_destroy (cr);
g_tile = tile_new_for_padding (norm_surf, blur_surf);
// clean up
tile_destroy (tile);
cairo_surface_destroy (norm_surf);
cairo_surface_destroy (blur_surf);
}