forked from AuroraMiddleware/gtk
tests: Move testcairo into gtk4-demo
Replace the boring checkboard pattern with this exciting drawing, and save one test binary at the same time!
This commit is contained in:
Matthias Clasen
parent
c133db4364
commit
e7bf4a3de8
@ -125,49 +125,164 @@ drag_end (GtkGestureDrag *gesture,
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}
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static void
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checkerboard_draw (GtkDrawingArea *da,
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cairo_t *cr,
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int width,
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int height,
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gpointer data)
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oval_path (cairo_t *cr,
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double xc, double yc,
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double xr, double yr)
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{
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gint i, j, xcount, ycount;
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cairo_save (cr);
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#define CHECK_SIZE 10
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#define SPACING 2
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, 1.0, yr / xr);
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cairo_move_to (cr, xr, 0.0);
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cairo_arc (cr,
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0, 0,
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xr,
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0, 2 * G_PI);
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cairo_close_path (cr);
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/* At the start of a draw handler, a clip region has been set on
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* the Cairo context, and the contents have been cleared to the
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* widget's background color. The docs for
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* gdk_surface_begin_paint_region() give more details on how this
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* works.
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*/
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cairo_restore (cr);
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}
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xcount = 0;
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i = SPACING;
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while (i < width)
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/* Fill the given area with checks in the standard style
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* for showing compositing effects.
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*
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* It would make sense to do this as a repeating surface,
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* but most implementations of RENDER currently have broken
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* implementations of repeat + transform, even when the
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* transform is a translation.
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*/
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static void
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fill_checks (cairo_t *cr,
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int x, int y,
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int width, int height)
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{
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int i, j;
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#define CHECK_SIZE 16
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cairo_rectangle (cr, x, y, width, height);
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cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
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cairo_fill (cr);
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/* Only works for CHECK_SIZE a power of 2 */
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j = x & (-CHECK_SIZE);
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for (; j < height; j += CHECK_SIZE)
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{
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j = SPACING;
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ycount = xcount % 2; /* start with even/odd depending on row */
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while (j < height)
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{
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if (ycount % 2)
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cairo_set_source_rgb (cr, 0.45777, 0, 0.45777);
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else
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cairo_set_source_rgb (cr, 1, 1, 1);
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/* If we're outside the clip, this will do nothing.
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*/
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i = y & (-CHECK_SIZE);
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for (; i < width; i += CHECK_SIZE)
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if ((i / CHECK_SIZE + j / CHECK_SIZE) % 2 == 0)
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cairo_rectangle (cr, i, j, CHECK_SIZE, CHECK_SIZE);
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cairo_fill (cr);
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j += CHECK_SIZE + SPACING;
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++ycount;
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}
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i += CHECK_SIZE + SPACING;
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++xcount;
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}
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cairo_set_source_rgb (cr, 0.7, 0.7, 0.7);
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cairo_fill (cr);
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#undef CHECK_SIZE
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}
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/* Draw a red, green, and blue circle equally spaced inside
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* the larger circle of radius r at (xc, yc)
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*/
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static void
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draw_3circles (cairo_t *cr,
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double xc, double yc,
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double radius,
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double alpha)
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{
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double subradius = radius * (2 / 3. - 0.1);
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cairo_set_source_rgba (cr, 1., 0., 0., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5)),
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yc - radius / 3. * sin (G_PI * (0.5)),
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subradius, subradius);
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cairo_fill (cr);
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cairo_set_source_rgba (cr, 0., 1., 0., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5 + 2/.3)),
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yc - radius / 3. * sin (G_PI * (0.5 + 2/.3)),
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subradius, subradius);
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cairo_fill (cr);
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cairo_set_source_rgba (cr, 0., 0., 1., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5 + 4/.3)),
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yc - radius / 3. * sin (G_PI * (0.5 + 4/.3)),
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subradius, subradius);
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cairo_fill (cr);
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}
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static void
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groups_draw (GtkDrawingArea *darea,
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cairo_t *cr,
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int width,
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int height,
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gpointer data)
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{
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cairo_surface_t *overlay, *punch, *circles;
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cairo_t *overlay_cr, *punch_cr, *circles_cr;
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/* Fill the background */
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double radius = 0.5 * (width < height ? width : height) - 10;
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double xc = width / 2.;
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double yc = height / 2.;
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overlay = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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width, height);
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punch = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_ALPHA,
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width, height);
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circles = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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width, height);
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fill_checks (cr, 0, 0, width, height);
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/* Draw a black circle on the overlay
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*/
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overlay_cr = cairo_create (overlay);
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cairo_set_source_rgb (overlay_cr, 0., 0., 0.);
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oval_path (overlay_cr, xc, yc, radius, radius);
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cairo_fill (overlay_cr);
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/* Draw 3 circles to the punch surface, then cut
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* that out of the main circle in the overlay
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*/
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punch_cr = cairo_create (punch);
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draw_3circles (punch_cr, xc, yc, radius, 1.0);
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cairo_destroy (punch_cr);
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cairo_set_operator (overlay_cr, CAIRO_OPERATOR_DEST_OUT);
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cairo_set_source_surface (overlay_cr, punch, 0, 0);
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cairo_paint (overlay_cr);
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/* Now draw the 3 circles in a subgroup again
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* at half intensity, and use OperatorAdd to join up
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* without seams.
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*/
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circles_cr = cairo_create (circles);
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cairo_set_operator (circles_cr, CAIRO_OPERATOR_OVER);
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draw_3circles (circles_cr, xc, yc, radius, 0.5);
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cairo_destroy (circles_cr);
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cairo_set_operator (overlay_cr, CAIRO_OPERATOR_ADD);
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cairo_set_source_surface (overlay_cr, circles, 0, 0);
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cairo_paint (overlay_cr);
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cairo_destroy (overlay_cr);
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cairo_set_source_surface (cr, overlay, 0, 0);
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cairo_paint (cr);
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cairo_surface_destroy (overlay);
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cairo_surface_destroy (punch);
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cairo_surface_destroy (circles);
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}
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static void
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@ -207,12 +322,11 @@ do_drawingarea (GtkWidget *do_widget)
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gtk_window_set_child (GTK_WINDOW (window), vbox);
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/*
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* Create the checkerboard area
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* Create the groups area
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*/
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label = gtk_label_new (NULL);
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gtk_label_set_markup (GTK_LABEL (label),
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"<u>Checkerboard pattern</u>");
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"<u>Knockout groups</u>");
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gtk_box_append (GTK_BOX (vbox), label);
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frame = gtk_frame_new (NULL);
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@ -222,7 +336,7 @@ do_drawingarea (GtkWidget *do_widget)
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da = gtk_drawing_area_new ();
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gtk_drawing_area_set_content_width (GTK_DRAWING_AREA (da), 100);
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gtk_drawing_area_set_content_height (GTK_DRAWING_AREA (da), 100);
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gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), checkerboard_draw, NULL, NULL);
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gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), groups_draw, NULL, NULL);
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gtk_frame_set_child (GTK_FRAME (frame), da);
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/*
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@ -19,7 +19,6 @@ gtk_tests = [
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['testbaseline'],
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['testbox'],
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['testbuttons'],
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['testcairo'],
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['testcalendar'],
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['testclipboard2'],
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['testcolorchooser'],
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@ -1,223 +0,0 @@
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/* testimage.c
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* Copyright (C) 2005 Red Hat, Inc.
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* Based on cairo-demo/X11/cairo-knockout.c
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*
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* Author: Owen Taylor
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <math.h>
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#include <gtk/gtk.h>
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static void
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oval_path (cairo_t *cr,
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double xc, double yc,
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double xr, double yr)
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{
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cairo_save (cr);
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cairo_translate (cr, xc, yc);
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cairo_scale (cr, 1.0, yr / xr);
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cairo_move_to (cr, xr, 0.0);
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cairo_arc (cr,
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0, 0,
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xr,
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0, 2 * G_PI);
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cairo_close_path (cr);
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cairo_restore (cr);
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}
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/* Create a path that is a circular oval with radii xr, yr at xc,
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* yc.
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*/
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/* Fill the given area with checks in the standard style
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* for showing compositing effects.
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*
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* It would make sense to do this as a repeating surface,
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* but most implementations of RENDER currently have broken
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* implementations of repeat + transform, even when the
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* transform is a translation.
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*/
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static void
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fill_checks (cairo_t *cr,
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int x, int y,
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int width, int height)
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{
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int i, j;
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#define CHECK_SIZE 32
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cairo_rectangle (cr, x, y, width, height);
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cairo_set_source_rgb (cr, 0.4, 0.4, 0.4);
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cairo_fill (cr);
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/* Only works for CHECK_SIZE a power of 2 */
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j = x & (-CHECK_SIZE);
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for (; j < height; j += CHECK_SIZE)
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{
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i = y & (-CHECK_SIZE);
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for (; i < width; i += CHECK_SIZE)
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if ((i / CHECK_SIZE + j / CHECK_SIZE) % 2 == 0)
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cairo_rectangle (cr, i, j, CHECK_SIZE, CHECK_SIZE);
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}
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cairo_set_source_rgb (cr, 0.7, 0.7, 0.7);
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cairo_fill (cr);
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}
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/* Draw a red, green, and blue circle equally spaced inside
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* the larger circle of radius r at (xc, yc)
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*/
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static void
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draw_3circles (cairo_t *cr,
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double xc, double yc,
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double radius,
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double alpha)
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{
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double subradius = radius * (2 / 3. - 0.1);
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cairo_set_source_rgba (cr, 1., 0., 0., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5)),
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yc - radius / 3. * sin (G_PI * (0.5)),
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subradius, subradius);
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cairo_fill (cr);
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cairo_set_source_rgba (cr, 0., 1., 0., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5 + 2/.3)),
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yc - radius / 3. * sin (G_PI * (0.5 + 2/.3)),
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subradius, subradius);
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cairo_fill (cr);
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cairo_set_source_rgba (cr, 0., 0., 1., alpha);
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oval_path (cr,
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xc + radius / 3. * cos (G_PI * (0.5 + 4/.3)),
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yc - radius / 3. * sin (G_PI * (0.5 + 4/.3)),
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subradius, subradius);
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cairo_fill (cr);
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}
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static void
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on_draw (GtkDrawingArea *darea,
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cairo_t *cr,
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int width,
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int height,
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gpointer data)
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{
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cairo_surface_t *overlay, *punch, *circles;
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cairo_t *overlay_cr, *punch_cr, *circles_cr;
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/* Fill the background */
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double radius = 0.5 * (width < height ? width : height) - 10;
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double xc = width / 2.;
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double yc = height / 2.;
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overlay = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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width, height);
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punch = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_ALPHA,
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width, height);
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circles = cairo_surface_create_similar (cairo_get_target (cr),
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CAIRO_CONTENT_COLOR_ALPHA,
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width, height);
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fill_checks (cr, 0, 0, width, height);
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/* Draw a black circle on the overlay
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*/
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overlay_cr = cairo_create (overlay);
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cairo_set_source_rgb (overlay_cr, 0., 0., 0.);
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oval_path (overlay_cr, xc, yc, radius, radius);
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cairo_fill (overlay_cr);
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/* Draw 3 circles to the punch surface, then cut
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* that out of the main circle in the overlay
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*/
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punch_cr = cairo_create (punch);
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draw_3circles (punch_cr, xc, yc, radius, 1.0);
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cairo_destroy (punch_cr);
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cairo_set_operator (overlay_cr, CAIRO_OPERATOR_DEST_OUT);
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cairo_set_source_surface (overlay_cr, punch, 0, 0);
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cairo_paint (overlay_cr);
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/* Now draw the 3 circles in a subgroup again
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* at half intensity, and use OperatorAdd to join up
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* without seams.
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*/
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circles_cr = cairo_create (circles);
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cairo_set_operator (circles_cr, CAIRO_OPERATOR_OVER);
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draw_3circles (circles_cr, xc, yc, radius, 0.5);
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cairo_destroy (circles_cr);
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cairo_set_operator (overlay_cr, CAIRO_OPERATOR_ADD);
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cairo_set_source_surface (overlay_cr, circles, 0, 0);
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cairo_paint (overlay_cr);
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cairo_destroy (overlay_cr);
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cairo_set_source_surface (cr, overlay, 0, 0);
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cairo_paint (cr);
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cairo_surface_destroy (overlay);
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cairo_surface_destroy (punch);
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cairo_surface_destroy (circles);
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}
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static void
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quit_cb (GtkWidget *widget,
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gpointer data)
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{
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gboolean *done = data;
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*done = TRUE;
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g_main_context_wakeup (NULL);
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}
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int
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main (int argc, char **argv)
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{
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GtkWidget *window, *darea;
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gboolean done = FALSE;
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gtk_init ();
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window = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (window), 400, 400);
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gtk_window_set_title (GTK_WINDOW (window), "cairo: Knockout Groups");
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darea = gtk_drawing_area_new ();
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gtk_window_set_child (GTK_WINDOW (window), darea);
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gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (darea), on_draw, NULL, NULL);
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g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
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gtk_widget_show (window);
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while (!done)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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