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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [image/] [draw/] [clip_test.go] - Blame information for rev 774

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Line No. Rev Author Line
1 747 jeremybenn 
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package draw
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import (
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        "image"
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        "testing"
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)
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type clipTest struct {
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        desc          string
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        r, dr, sr, mr image.Rectangle
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        sp, mp        image.Point
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        nilMask       bool
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        r0            image.Rectangle
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        sp0, mp0      image.Point
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}
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var clipTests = []clipTest{
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        // The following tests all have a nil mask.
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        {
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                "basic",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 100, 100),
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                image.ZR,
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                image.ZP,
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                image.ZP,
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                true,
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                image.Rect(0, 0, 100, 100),
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                image.ZP,
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                image.ZP,
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        },
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        {
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                "clip dr",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(40, 40, 60, 60),
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                image.Rect(0, 0, 100, 100),
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                image.ZR,
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                image.ZP,
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                image.ZP,
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                true,
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                image.Rect(40, 40, 60, 60),
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                image.Pt(40, 40),
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                image.ZP,
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        },
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        {
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                "clip sr",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 100, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.ZP,
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                image.ZP,
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                true,
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                image.Rect(20, 20, 80, 80),
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                image.Pt(20, 20),
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                image.ZP,
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        },
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        {
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                "clip dr and sr",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 50, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.ZP,
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                image.ZP,
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                true,
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                image.Rect(20, 20, 50, 80),
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                image.Pt(20, 20),
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                image.ZP,
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        },
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        {
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                "clip dr and sr, sp outside sr (top-left)",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 50, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.Pt(15, 8),
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                image.ZP,
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                true,
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                image.Rect(5, 12, 50, 72),
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                image.Pt(20, 20),
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                image.ZP,
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        },
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        {
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                "clip dr and sr, sp outside sr (middle-left)",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 50, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.Pt(15, 66),
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                image.ZP,
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                true,
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                image.Rect(5, 0, 50, 14),
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                image.Pt(20, 66),
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                image.ZP,
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        },
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        {
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                "clip dr and sr, sp outside sr (bottom-left)",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 50, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.Pt(15, 91),
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                image.ZP,
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                true,
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                image.ZR,
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                image.Pt(15, 91),
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                image.ZP,
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        },
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        {
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                "clip dr and sr, sp inside sr",
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                image.Rect(0, 0, 100, 100),
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                image.Rect(0, 0, 50, 100),
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                image.Rect(20, 20, 80, 80),
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                image.ZR,
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                image.Pt(44, 33),
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                image.ZP,
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                true,
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                image.Rect(0, 0, 36, 47),
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                image.Pt(44, 33),
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                image.ZP,
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        },
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        // The following tests all have a non-nil mask.
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        {
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                "basic mask",
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                image.Rect(0, 0, 80, 80),
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                image.Rect(20, 0, 100, 80),
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                image.Rect(0, 0, 50, 49),
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                image.Rect(0, 0, 46, 47),
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                image.ZP,
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                image.ZP,
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                false,
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                image.Rect(20, 0, 46, 47),
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                image.Pt(20, 0),
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                image.Pt(20, 0),
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        },
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        // TODO(nigeltao): write more tests.
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}
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func TestClip(t *testing.T) {
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        dst0 := image.NewRGBA(image.Rect(0, 0, 100, 100))
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        src0 := image.NewRGBA(image.Rect(0, 0, 100, 100))
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        mask0 := image.NewRGBA(image.Rect(0, 0, 100, 100))
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        for _, c := range clipTests {
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                dst := dst0.SubImage(c.dr).(*image.RGBA)
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                src := src0.SubImage(c.sr).(*image.RGBA)
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                var mask image.Image
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                if !c.nilMask {
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                        mask = mask0.SubImage(c.mr)
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                }
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                r, sp, mp := c.r, c.sp, c.mp
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                clip(dst, &r, src, &sp, mask, &mp)
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                // Check that the actual results equal the expected results.
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                if !c.r0.Eq(r) {
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                        t.Errorf("%s: clip rectangle want %v got %v", c.desc, c.r0, r)
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                        continue
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                }
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                if !c.sp0.Eq(sp) {
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                        t.Errorf("%s: sp want %v got %v", c.desc, c.sp0, sp)
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                        continue
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                }
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                if !c.nilMask {
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                        if !c.mp0.Eq(mp) {
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                                t.Errorf("%s: mp want %v got %v", c.desc, c.mp0, mp)
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                                continue
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                        }
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                }
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                // Check that the clipped rectangle is contained by the dst / src / mask
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                // rectangles, in their respective co-ordinate spaces.
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                if !r.In(c.dr) {
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                        t.Errorf("%s: c.dr %v does not contain r %v", c.desc, c.dr, r)
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                }
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                // sr is r translated into src's co-ordinate space.
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                sr := r.Add(c.sp.Sub(c.dr.Min))
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                if !sr.In(c.sr) {
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                        t.Errorf("%s: c.sr %v does not contain sr %v", c.desc, c.sr, sr)
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                }
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                if !c.nilMask {
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                        // mr is r translated into mask's co-ordinate space.
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                        mr := r.Add(c.mp.Sub(c.dr.Min))
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                        if !mr.In(c.mr) {
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                                t.Errorf("%s: c.mr %v does not contain mr %v", c.desc, c.mr, mr)
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                        }
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                }
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        }
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}

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