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testrect.c
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/**
* Original code: automated SDL rect test written by Edgar Simo "bobbens"
*/
#include <stdio.h>
#include <SDL/SDL.h>
#include "../SDL_test.h"
/* Test cases */
static const TestCaseReference test1 =
(TestCaseReference){ "rect_testIntersectRectAndLine", "description", TEST_ENABLED, 0 };
/* Test suite */
extern const TestCaseReference *testSuite[] = {
&test1, NULL
};
TestCaseReference **QueryTestSuite() {
return (TestCaseReference **)testSuite;
}
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/*!
* \brief Tests SDL_IntersectRectAndLine()
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*/
int rect_testIntersectRectAndLine (void *arg)
{
SDL_Rect rect = { 0, 0, 32, 32 };
int x1, y1;
int x2, y2;
SDL_bool clipped;
x1 = -10;
y1 = 0;
x2 = -10;
y2 = 31;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( !clipped &&
x1 == -10 && y1 == 0 && x2 == -10 && y2 == 31,
"line outside to the left was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 40;
y1 = 0;
x2 = 40;
y2 = 31;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( !clipped &&
x1 == 40 && y1 == 0 && x2 == 40 && y2 == 31,
"line outside to the right was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 0;
y1 = -10;
x2 = 31;
y2 = -10;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( !clipped &&
x1 == 0 && y1 == -10 && x2 == 31 && y2 == -10,
"line outside above was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 0;
y1 = 40;
x2 = 31;
y2 = 40;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( !clipped &&
x1 == 0 && y1 == 40 && x2 == 31 && y2 == 40,
"line outside below was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 0;
y1 = 0;
x2 = 31;
y2 = 31;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 0 && y1 == 0 && x2 == 31 && y2 == 31,
"line fully inside rect was clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = -10;
y1 = 15;
x2 = 40;
y2 = 15;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 0 && y1 == 15 && x2 == 31 && y2 == 15,
"horizontal line rect was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = -32;
y1 = -32;
x2 = 63;
y2 = 63;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 0 && y1 == 0 && x2 == 31 && y2 == 31,
"diagonal line to lower right was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 63;
y1 = 63;
x2 = -32;
y2 = -32;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 31 && y1 == 31 && x2 == 0 && y2 == 0,
"diagonal line to upper left was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = 63;
y1 = -32;
x2 = -32;
y2 = 63;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 31 && y1 == 0 && x2 == 0 && y2 == 31,
"diagonal line to lower left was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
x1 = -32;
y1 = 63;
x2 = 63;
y2 = -32;
clipped = SDL_IntersectRectAndLine(&rect, &x1, &y1, &x2, &y2);
AssertTrue( clipped &&
x1 == 0 && y1 == 31 && x2 == 31 && y2 == 0,
"diagonal line to upper right was incorrectly clipped: %d,%d - %d,%d",
x1, y1, x2, y2);
}