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![Pekka Paalanen](/assets/img/avatar_default.png)
This clarifies what is supposed to be the libweston code. v2: screen-share.c is already in compositor/ instead. Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk> Reviewed-by: Yong Bakos <ybakos@humanoriented.com> Acked-by: Daniel Stone <daniels@collabora.com> Reviewed-by: Quentin Glidic <sardemff7+git@sardemff7.net> Tested-by: Quentin Glidic <sardemff7+git@sardemff7.net> Tested-by: Benoit Gschwind <gschwind@gnu-log.net> Acked-by: Benoit Gschwind <gschwind@gnu-log.net> [Pekka: rebased]
224 lines
6.3 KiB
C
224 lines
6.3 KiB
C
/*
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* Copyright © 2013 Sam Spilsbury <smspillaz@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <assert.h>
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#include <string.h>
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#include "weston-test-runner.h"
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#include "shared/helpers.h"
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#include "vertex-clipping.h"
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#define BOUNDING_BOX_TOP_Y 100.0f
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#define BOUNDING_BOX_LEFT_X 50.0f
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#define BOUNDING_BOX_RIGHT_X 100.0f
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#define BOUNDING_BOX_BOTTOM_Y 50.0f
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#define INSIDE_X1 (BOUNDING_BOX_LEFT_X + 1.0f)
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#define INSIDE_X2 (BOUNDING_BOX_RIGHT_X - 1.0f)
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#define INSIDE_Y1 (BOUNDING_BOX_BOTTOM_Y + 1.0f)
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#define INSIDE_Y2 (BOUNDING_BOX_TOP_Y - 1.0f)
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#define OUTSIDE_X1 (BOUNDING_BOX_LEFT_X - 1.0f)
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#define OUTSIDE_X2 (BOUNDING_BOX_RIGHT_X + 1.0f)
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#define OUTSIDE_Y1 (BOUNDING_BOX_BOTTOM_Y - 1.0f)
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#define OUTSIDE_Y2 (BOUNDING_BOX_TOP_Y + 1.0f)
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static void
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populate_clip_context (struct clip_context *ctx)
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{
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ctx->clip.x1 = BOUNDING_BOX_LEFT_X;
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ctx->clip.y1 = BOUNDING_BOX_BOTTOM_Y;
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ctx->clip.x2 = BOUNDING_BOX_RIGHT_X;
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ctx->clip.y2 = BOUNDING_BOX_TOP_Y;
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}
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static int
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clip_polygon (struct clip_context *ctx,
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struct polygon8 *polygon,
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float *vertices_x,
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float *vertices_y)
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{
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populate_clip_context(ctx);
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return clip_transformed(ctx, polygon, vertices_x, vertices_y);
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}
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struct vertex_clip_test_data
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{
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struct polygon8 surface;
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struct polygon8 expected;
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};
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const struct vertex_clip_test_data test_data[] =
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{
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/* All inside */
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{
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{
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{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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},
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{
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{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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}
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},
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/* Top outside */
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{
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{
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{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, OUTSIDE_Y2, OUTSIDE_Y2 },
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4
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},
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{
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{ INSIDE_X1, INSIDE_X1, INSIDE_X2, INSIDE_X2 },
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{ BOUNDING_BOX_TOP_Y, INSIDE_Y1, INSIDE_Y1, BOUNDING_BOX_TOP_Y },
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4
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}
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},
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/* Bottom outside */
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{
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{
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{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
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{ OUTSIDE_Y1, OUTSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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},
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{
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{ INSIDE_X1, INSIDE_X2, INSIDE_X2, INSIDE_X1 },
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{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_BOTTOM_Y, INSIDE_Y2, INSIDE_Y2 },
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4
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}
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},
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/* Left outside */
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{
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{
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{ OUTSIDE_X1, INSIDE_X2, INSIDE_X2, OUTSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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},
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{
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{ BOUNDING_BOX_LEFT_X, INSIDE_X2, INSIDE_X2, BOUNDING_BOX_LEFT_X },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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}
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},
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/* Right outside */
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{
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{
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{ INSIDE_X1, OUTSIDE_X2, OUTSIDE_X2, INSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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},
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{
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{ INSIDE_X1, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X, INSIDE_X1 },
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{ INSIDE_Y1, INSIDE_Y1, INSIDE_Y2, INSIDE_Y2 },
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4
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}
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},
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/* Diamond extending from bounding box edges, clip to bounding box */
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{
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{
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{ BOUNDING_BOX_LEFT_X - 25, BOUNDING_BOX_LEFT_X + 25, BOUNDING_BOX_RIGHT_X + 25, BOUNDING_BOX_RIGHT_X - 25 },
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{ BOUNDING_BOX_BOTTOM_Y + 25, BOUNDING_BOX_TOP_Y + 25, BOUNDING_BOX_TOP_Y - 25, BOUNDING_BOX_BOTTOM_Y - 25 },
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4
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},
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{
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{ BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X },
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{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_TOP_Y, BOUNDING_BOX_TOP_Y, BOUNDING_BOX_BOTTOM_Y },
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4
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}
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},
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/* Diamond inside of bounding box edges, clip t bounding box, 8 resulting vertices */
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{
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{
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{ BOUNDING_BOX_LEFT_X - 12.5, BOUNDING_BOX_LEFT_X + 25, BOUNDING_BOX_RIGHT_X + 12.5, BOUNDING_BOX_RIGHT_X - 25 },
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{ BOUNDING_BOX_BOTTOM_Y + 25, BOUNDING_BOX_TOP_Y + 12.5, BOUNDING_BOX_TOP_Y - 25, BOUNDING_BOX_BOTTOM_Y - 12.5 },
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4
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},
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{
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{ BOUNDING_BOX_LEFT_X + 12.5, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X, BOUNDING_BOX_LEFT_X + 12.5,
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BOUNDING_BOX_RIGHT_X - 12.5, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X, BOUNDING_BOX_RIGHT_X - 12.5 },
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{ BOUNDING_BOX_BOTTOM_Y, BOUNDING_BOX_BOTTOM_Y + 12.5, BOUNDING_BOX_TOP_Y - 12.5, BOUNDING_BOX_TOP_Y,
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BOUNDING_BOX_TOP_Y, BOUNDING_BOX_TOP_Y - 12.5, BOUNDING_BOX_BOTTOM_Y + 12.5, BOUNDING_BOX_BOTTOM_Y },
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8
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}
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}
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};
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/* clip_polygon modifies the source operand and the test data must
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* be const, so we need to deep copy it */
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static void
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deep_copy_polygon8(const struct polygon8 *src, struct polygon8 *dst)
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{
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dst->n = src->n;
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memcpy((void *) dst->x, src->x, sizeof (src->x));
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memcpy((void *) dst->y, src->y, sizeof (src->y));
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}
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TEST_P(clip_polygon_n_vertices_emitted, test_data)
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{
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struct vertex_clip_test_data *tdata = data;
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struct clip_context ctx;
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struct polygon8 polygon;
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float vertices_x[8];
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float vertices_y[8];
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deep_copy_polygon8(&tdata->surface, &polygon);
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int emitted = clip_polygon(&ctx, &polygon, vertices_x, vertices_y);
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assert(emitted == tdata->expected.n);
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}
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TEST_P(clip_polygon_expected_vertices, test_data)
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{
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struct vertex_clip_test_data *tdata = data;
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struct clip_context ctx;
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struct polygon8 polygon;
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float vertices_x[8];
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float vertices_y[8];
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deep_copy_polygon8(&tdata->surface, &polygon);
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int emitted = clip_polygon(&ctx, &polygon, vertices_x, vertices_y);
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int i = 0;
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for (; i < emitted; ++i)
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{
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assert(vertices_x[i] == tdata->expected.x[i]);
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assert(vertices_y[i] == tdata->expected.y[i]);
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}
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}
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TEST(float_difference_different)
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{
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assert(float_difference(1.0f, 0.0f) == 1.0f);
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}
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TEST(float_difference_same)
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{
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assert(float_difference(1.0f, 1.0f) == 0.0f);
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}
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