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Added tests for the vertex clipping code.

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This tests (via the table-driven testing method) that the correct
number of vertices and also the correct vertices themselves
are generated for an clip box and polygon of up to eight vertices.

Also add a libshared-test.la so that we don't have to build weston-test-runner
all the time
dev
Sam Spilsbury 11 years ago committed by Kristian Høgsberg
parent 619859ce90
commit b42fb52537
2 changed files with 245 additions and 11 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 37
      tests/Makefile.am
  2. 219
      tests/vertex-clip-test.c

37
tests/Makefile.am
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@ -1,7 +1,8 @@
TESTS = $(shared_tests) $(module_tests) $(weston_tests)
shared_tests = \
config-parser.test
config-parser.test \
vertex-clip.test
module_tests = \
surface-test.la \
@ -48,13 +49,6 @@ AM_CPPFLAGS = \
-DUNIT_TEST \
$(COMPOSITOR_CFLAGS)
config_parser_test_LDADD = \
../shared/libshared.la \
$(COMPOSITOR_LIBS)
config_parser_test_SOURCES = \
config-parser-test.c
surface_global_test_la_SOURCES = surface-global-test.c
surface_global_test_la_LDFLAGS = -module -avoid-version -rpath $(libdir)
surface_test_la_SOURCES = surface-test.c
@ -72,17 +66,38 @@ weston_test_la_SOURCES = \
weston_test_runner_src = \
weston-test-runner.c \
weston-test-runner.h
check_LTLIBRARIES = libshared-test.la
libshared_test_la_SOURCES = \
$(weston_test_runner_src)
libshared_test_la_CFLAGS = $(GCC_CFLAGS) $(COMPOSITOR_CFLAGS)
config_parser_test_LDADD = \
../shared/libshared.la \
libshared-test.la \
$(COMPOSITOR_LIBS)
config_parser_test_SOURCES = \
config-parser-test.c
vertex_clip_test_SOURCES = \
vertex-clip-test.c \
../src/vertex-clipping.c \
../src/vertex-clipping.h
vertex_clip_test_LDADD = \
libshared-test.la \
-lm -lrt
weston_test_client_src = \
weston-test-client-helper.c \
weston-test-client-helper.h \
wayland-test-protocol.c \
wayland-test-client-protocol.h \
subsurface-protocol.c \
subsurface-client-protocol.h \
$(weston_test_runner_src)
subsurface-client-protocol.h
weston_test_client_libs = \
$(SIMPLE_CLIENT_LIBS) \
../shared/libshared.la
../shared/libshared.la \
libshared-test.la
keyboard_weston_SOURCES = keyboard-test.c $(weston_test_client_src)
keyboard_weston_LDADD = $(weston_test_client_libs)

219
tests/vertex-clip-test.c
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@ -0,0 +1,219 @@
/*
* Copyright © 2013 Sam Spilsbury <smspillaz@gmail.com>
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "weston-test-runner.h"
#include "../src/vertex-clipping.h"
#define BOUNDING_BOX_TOP_Y 100.0f
#define BOUNDING_BOX_LEFT_X 50.0f
#define BOUNDING_BOX_RIGHT_X 100.0f
#define BOUNDING_BOX_BOTTOM_Y 50.0f
#define INSIDE_X1 (BOUNDING_BOX_LEFT_X + 1.0f)
#define INSIDE_X2 (BOUNDING_BOX_RIGHT_X - 1.0f)
#define INSIDE_Y1 (BOUNDING_BOX_BOTTOM_Y + 1.0f)
#define INSIDE_Y2 (BOUNDING_BOX_TOP_Y - 1.0f)
#define OUTSIDE_X1 (BOUNDING_BOX_LEFT_X - 1.0f)
#define OUTSIDE_X2 (BOUNDING_BOX_RIGHT_X + 1.0f)
#define OUTSIDE_Y1 (BOUNDING_BOX_BOTTOM_Y - 1.0f)
#define OUTSIDE_Y2 (BOUNDING_BOX_TOP_Y + 1.0f)
static void
populate_clip_context (struct clip_context *ctx)
{
ctx->clip.x1 = BOUNDING_BOX_LEFT_X;
ctx->clip.y1 = BOUNDING_BOX_BOTTOM_Y;
ctx->clip.x2 = BOUNDING_BOX_RIGHT_X;
ctx->clip.y2 = BOUNDING_BOX_TOP_Y;
}
static int
clip_polygon (struct clip_context *ctx,
struct polygon8 *polygon,
GLfloat *vertices_x,
GLfloat *vertices_y)
{
populate_clip_context(ctx);
return clip_transformed(ctx, polygon, vertices_x, vertices_y);
}
struct vertex_clip_test_data
{
struct polygon8 surface;
struct polygon8 expected;
};
const struct vertex_clip_test_data test_data[] =
{
/* All inside */
{
{
{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
},
{
{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
}
},
/* Top outside */
{
{
{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, OUTSIDE_Y2, OUTSIDE_Y2 },
4
},
{
{ INSIDE_X1, INSIDE_X1, INSIDE_X2, INSIDE_X2 },
{ BOUNDING_BOX_TOP_Y, INSIDE_Y1, INSIDE_Y1, BOUNDING_BOX_TOP_Y },
4
}
},
/* Bottom outside */
{
{
{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
{ OUTSIDE_Y1, OUTSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
},
{
{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_BOTTOM_Y, INSIDE_Y2, INSIDE_Y2 },
4
}
},
/* Left outside */
{
{
{ OUTSIDE_X1, INSIDE_X2, INSIDE_X2, OUTSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
},
{
{ BOUNDING_BOX_LEFT_X, INSIDE_X2, INSIDE_X2, BOUNDING_BOX_LEFT_X },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
}
},
/* Right outside */
{
{
{ INSIDE_X1, OUTSIDE_X2, OUTSIDE_X2, INSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
},
{
{ INSIDE_X1, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X, INSIDE_X1 },
{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
4
}
},
/* Diamond extending from bounding box edges, clip to bounding box */
{
{
{ BOUNDING_BOX_LEFT_X - 25, BOUNDING_BOX_LEFT_X + 25, BOUNDING_BOX_RIGHT_X + 25, BOUNDING_BOX_RIGHT_X - 25 },
{ BOUNDING_BOX_BOTTOM_Y + 25, BOUNDING_BOX_TOP_Y + 25, BOUNDING_BOX_TOP_Y - 25, BOUNDING_BOX_BOTTOM_Y - 25 },
4
},
{
{ BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X },
{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_TOP_Y, BOUNDING_BOX_TOP_Y, BOUNDING_BOX_BOTTOM_Y },
4
}
},
/* Diamond inside of bounding box edges, clip t bounding box, 8 resulting vertices */
{
{
{ BOUNDING_BOX_LEFT_X - 12.5, BOUNDING_BOX_LEFT_X + 25, BOUNDING_BOX_RIGHT_X + 12.5, BOUNDING_BOX_RIGHT_X - 25 },
{ BOUNDING_BOX_BOTTOM_Y + 25, BOUNDING_BOX_TOP_Y + 12.5, BOUNDING_BOX_TOP_Y - 25, BOUNDING_BOX_BOTTOM_Y - 12.5 },
4
},
{
{ BOUNDING_BOX_LEFT_X + 12.5, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X + 12.5,
BOUNDING_BOX_RIGHT_X - 12.5, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X - 12.5 },
{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_BOTTOM_Y + 12.5, BOUNDING_BOX_TOP_Y - 12.5, BOUNDING_BOX_TOP_Y,
BOUNDING_BOX_TOP_Y, BOUNDING_BOX_TOP_Y - 12.5, BOUNDING_BOX_BOTTOM_Y + 12.5, BOUNDING_BOX_BOTTOM_Y },
8
}
}
};
/* clip_polygon modifies the source operand and the test data must
* be const, so we need to deep copy it */
static void
deep_copy_polygon8(const struct polygon8 *src, struct polygon8 *dst)
{
dst->n = src->n;
memcpy((void *) dst->x, src->x, sizeof (src->x));
memcpy((void *) dst->y, src->y, sizeof (src->y));
}
TEST_P(clip_polygon_n_vertices_emitted, test_data)
{
struct vertex_clip_test_data *tdata = data;
struct clip_context ctx;
struct polygon8 polygon;
GLfloat vertices_x[8];
GLfloat vertices_y[8];
deep_copy_polygon8(&tdata->surface, &polygon);
int emitted = clip_polygon(&ctx, &polygon, vertices_x, vertices_y);
assert(emitted == tdata->expected.n);
}
TEST_P(clip_polygon_expected_vertices, test_data)
{
struct vertex_clip_test_data *tdata = data;
struct clip_context ctx;
struct polygon8 polygon;
GLfloat vertices_x[8];
GLfloat vertices_y[8];
deep_copy_polygon8(&tdata->surface, &polygon);
int emitted = clip_polygon(&ctx, &polygon, vertices_x, vertices_y);
int i = 0;
for (; i < emitted; ++i)
{
assert(vertices_x[i] == tdata->expected.x[i]);
assert(vertices_y[i] == tdata->expected.y[i]);
}
}
TEST(float_difference_different)
{
assert(float_difference(1.0f, 0.0f) == 1.0f);
}
TEST(float_difference_same)
{
assert(float_difference(1.0f, 1.0f) == 0.0f);
}
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