test: Add DrawSegments

Compare fb/ddx for many DrawSegments operations.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/.gitignore

@@ -6,6 +6,7 @@ basic-lines
 basic-stress
 basic-stippledrect
 basic-tiledrect
+DrawSegments
 cursor-test
 render-fill
 render-trapezoid

test/DrawSegments.c

@@ -0,0 +1,249 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <X11/Xutil.h> /* for XDestroyImage */
+#include <pixman.h> /* for pixman blt functions */
+
+#include "test.h"
+
+static const XPoint points[]= {
+	/* top */
+	{ 0, 0},
+	{ 1, 0},
+	{ 2, 0},
+	{ 3, 0},
+	{ 4, 0},
+	{ 5, 0},
+	{ 6, 0},
+	{ 7, 0},
+	{ 8, 0},
+	/* right */
+	{ 8, 1},
+	{ 8, 2},
+	{ 8, 3},
+	{ 8, 4},
+	{ 8, 5},
+	{ 8, 6},
+	{ 8, 7},
+	{ 8, 8},
+	/* bottom */
+	{ 7, 8},
+	{ 6, 8},
+	{ 5, 8},
+	{ 4, 8},
+	{ 3, 8},
+	{ 2, 8},
+	{ 1, 8},
+	{ 0, 8},
+	/* left */
+	{ 0, 7},
+	{ 0, 6},
+	{ 0, 5},
+	{ 0, 4},
+	{ 0, 3},
+	{ 0, 2},
+	{ 0, 1},
+	{ 0, 0} /* and origin again for luck */
+};
+#define NUM_POINTS (sizeof(points)/sizeof(points[0]))
+
+static void clear(struct test_display *dpy, struct test_target *tt)
+{
+	XRenderColor render_color = {0};
+	XRenderFillRectangle(dpy->dpy, PictOpClear, tt->picture, &render_color,
+			     0, 0, tt->width, tt->height);
+}
+
+static void draw(struct test_display *dpy, struct test_target *tt,
+		 int alu, int width, int style, int cap,
+		 XSegment *seg, int nseg)
+{
+	XGCValues val;
+	GC gc;
+
+	val.function = alu;
+	val.foreground = WhitePixel(dpy->dpy, 0);
+	val.line_width = width;
+	val.line_style = style;
+	val.cap_style = cap;
+
+	gc = XCreateGC(dpy->dpy, tt->draw,
+		       GCForeground |
+		       GCFunction |
+		       GCLineWidth |
+		       GCLineStyle |
+		       GCCapStyle,
+		       &val);
+	XDrawSegments(dpy->dpy, tt->draw, gc, seg, nseg);
+	XFreeGC(dpy->dpy, gc);
+}
+
+static void hv0(struct test *t, enum target target)
+{
+	char buf[1024];
+	struct test_target out, ref;
+	int a, alu, cap;
+	XSegment seg[(NUM_POINTS+1)*8];
+	int n, x, y, nseg;
+
+	printf("Testing drawing of zero-width line segments (%s): ",
+	       test_target_name(target));
+	fflush(stdout);
+
+	test_target_create_render(&t->out, target, &out);
+	test_target_create_render(&t->ref, target, &ref);
+
+	y = x = n = 0;
+	for (a = 0; a <= NUM_POINTS; a++) {
+		seg[n].x1 = a + 64;
+		seg[n].y1 = y + 64;
+		seg[n].x2 = NUM_POINTS + 64;
+		seg[n].y2 = y + 64;
+		n++; y++;
+
+		seg[n].x1 = NUM_POINTS - a + 64;
+		seg[n].y1 = y + 64;
+		seg[n].x2 = 0 + 64;
+		seg[n].y2 = y + 64;
+		n++; y++;
+
+		seg[n].x2 = a + 64;
+		seg[n].y2 = y + 64;
+		seg[n].x1 = NUM_POINTS + 64;
+		seg[n].y1 = y + 64;
+		n++; y++;
+
+		seg[n].x2 = NUM_POINTS - a + 64;
+		seg[n].y2 = y + 64;
+		seg[n].x1 = 0 + 64;
+		seg[n].y1 = y + 64;
+		n++; y++;
+
+
+		seg[n].y1 = a + 64;
+		seg[n].x1 = x + 64;
+		seg[n].y2 = NUM_POINTS + 64;
+		seg[n].x2 = x + 64;
+		n++; x++;
+
+		seg[n].y1 = NUM_POINTS - a + 64;
+		seg[n].x1 = x + 64;
+		seg[n].y2 = 0 + 64;
+		seg[n].x2 = x + 64;
+		n++; x++;
+
+		seg[n].y2 = a + 64;
+		seg[n].x2 = x + 64;
+		seg[n].y1 = NUM_POINTS + 64;
+		seg[n].x1 = x + 64;
+		n++; x++;
+
+		seg[n].y2 = NUM_POINTS - a + 64;
+		seg[n].x2 = x + 64;
+		seg[n].y1 = 0 + 64;
+		seg[n].x1 = x + 64;
+		n++; x++;
+	}
+
+	for (alu = 0; alu < 16; alu++) {
+		for (cap = CapNotLast; cap <= CapProjecting; cap++) {
+			for (nseg = 0; nseg < n; nseg++) {
+				sprintf(buf,
+					"cap=%d, alu=%d, nseg=%d",
+					cap, alu, nseg);
+
+				clear(&t->out, &out);
+				clear(&t->ref, &ref);
+
+				draw(&t->out, &out, alu, 0, LineSolid, cap,
+				     seg, nseg);
+				draw(&t->ref, &ref, alu, 0, LineSolid, cap,
+				     seg, nseg);
+
+				test_compare(t,
+					     out.draw, out.format,
+					     ref.draw, ref.format,
+					     0, 0, out.width, out.height,
+					     buf);
+			}
+		}
+	}
+
+	test_target_destroy_render(&t->out, &out);
+	test_target_destroy_render(&t->ref, &ref);
+
+	printf("\n");
+}
+
+static void general(struct test *t, enum target target)
+{
+	char buf[1024];
+	struct test_target out, ref;
+	int a, b, alu, lw, style, cap;
+	XSegment seg[NUM_POINTS*NUM_POINTS];
+	int n = 0;
+
+	printf("Testing drawing of general line segments (%s): ",
+	       test_target_name(target));
+	fflush(stdout);
+
+	test_target_create_render(&t->out, target, &out);
+	test_target_create_render(&t->ref, target, &ref);
+
+	style = LineSolid;
+
+	for (a = 0; a < NUM_POINTS; a++) {
+		for (b = 0; b < NUM_POINTS; b++) {
+			seg[n].x1 = points[a].x + 64;
+			seg[n].y1 = points[a].y + 64;
+			seg[n].x2 = points[b].x + 64;
+			seg[n].y2 = points[b].y + 64;
+			n++;
+		}
+	}
+
+	for (alu = 0; alu < 16; alu++) {
+		for (cap = CapNotLast; cap <= CapProjecting; cap++) {
+			for (lw = 0; lw <= 4; lw++) {
+				sprintf(buf,
+					"width=%d, cap=%d, alu=%d",
+					lw, cap, alu);
+
+				clear(&t->out, &out);
+				clear(&t->ref, &ref);
+
+				draw(&t->out, &out, alu, lw, style, cap,
+					  seg, n);
+				draw(&t->ref, &ref, alu, lw, style, cap,
+					  seg, n);
+
+				test_compare(t,
+					     out.draw, out.format,
+					     ref.draw, ref.format,
+					     0, 0, out.width, out.height,
+					     buf);
+			}
+		}
+	}
+
+	test_target_destroy_render(&t->out, &out);
+	test_target_destroy_render(&t->ref, &ref);
+
+	printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+	struct test test;
+	enum target t;
+
+	test_init(&test, argc, argv);
+
+	for (t = TARGET_FIRST; t <= TARGET_LAST; t++) {
+		hv0(&test, t);
+		general(&test, t);
+	}
+
+	return 0;
+}

test/Makefile.am

@@ -9,6 +9,7 @@ stress_TESTS = \
 	basic-putimage \
 	basic-lines \
 	basic-stress \
+	DrawSegments \
 	cursor-test \
 	render-fill \
 	render-trapezoid \