--- /dev/null
+/*
+ * 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);
+}
+
projects / profile / ivi / weston-ivi-shell.git / commitdiff