fdo-mirrors/cairo
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/cairo/cairo.git synced 2026-05-01 07:58:04 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

test: Fix half-coverage colouration.

Browse source 
Hmm, red over red makes the test pointless. The test still remains of
highly dubious quality, as it primarily serves as a rendercheck more
than a test of Cairo. The best hope for this test is that it inspires a
better one.

And incorporate the notes made by Joonas.
This commit is contained in:
Chris Wilson 2010-06-10 11:28:26 +01:00
parent 5cb764850f
commit 486118361a
1 changed files with 27 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

28
test/half-coverage.c
View file

@ -41,6 +41,7 @@ rectangles (cairo_t *cr, int width, int height)
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
for (i = 1; i <= SIZE; i++) {
int x, y;
@ -52,6 +53,14 @@ rectangles (cairo_t *cr, int width, int height)
cairo_scale (cr, 1./SIZE, 1./SIZE);
for (x = -i; x < SIZE*WIDTH; x += 2*i) {
for (y = -i; y < SIZE*HEIGHT; y += 2*i) {
/* Add a little tile composed of two non-overlapping squares
* +--+
* | |
* |__|__
* | |
* | |
* +--+
*/
cairo_rectangle (cr, x, y, i, i);
cairo_rectangle (cr, x+i, y+i, i, i);
}
@ -72,6 +81,7 @@ triangles (cairo_t *cr, int width, int height)
cairo_set_source_rgb (cr, 1.0, 0.0, 0.0);
cairo_paint (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
for (i = 1; i <= SIZE; i++) {
int x, y;
@ -83,22 +93,38 @@ triangles (cairo_t *cr, int width, int height)
cairo_scale (cr, 1./SIZE, 1./SIZE);
for (x = -i; x < SIZE*WIDTH; x += 2*i) {
for (y = -i; y < SIZE*HEIGHT; y += 2*i) {
/* add internal edges just for fun */
/* Add a tile composed of four non-overlapping
* triangles. The plus and minus signs inside the
* triangles denote the orientation of the triangle's
* edges: + for clockwise and - for anticlockwise.
*
* +-----+
* \-|+/
* \|/
* /|\
* /-|-\
* +-----+
*/
/* top left triangle */
cairo_move_to (cr, x, y);
cairo_line_to (cr, x+i, y+i);
cairo_line_to (cr, x+i, y);
cairo_close_path (cr);
/* top right triangle */
cairo_move_to (cr, x+i, y);
cairo_line_to (cr, x+2*i, y);
cairo_line_to (cr, x+i, y+i);
cairo_close_path (cr);
/* bottom left triangle */
cairo_move_to (cr, x+i, y+i);
cairo_line_to (cr, x, y+2*i);
cairo_line_to (cr, x+i, y+2*i);
cairo_close_path (cr);
/* bottom right triangle */
cairo_move_to (cr, x+i, y+i);
cairo_line_to (cr, x+i, y+2*i);
cairo_line_to (cr, x+2*i, y+2*i);