The Tor Browser / file comparison
comparison: gfx/thebes/gfxRect.cpp
gfx/thebes/gfxRect.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:24a5ff186797 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "gfxRect.h" | |
| 7 | |
| 8 #include "nsMathUtils.h" | |
| 9 | |
| 10 static bool | |
| 11 WithinEpsilonOfInteger(gfxFloat aX, gfxFloat aEpsilon) | |
| 12 { | |
| 13 return fabs(NS_round(aX) - aX) <= fabs(aEpsilon); | |
| 14 } | |
| 15 | |
| 16 bool | |
| 17 gfxRect::WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const | |
| 18 { | |
| 19 NS_ASSERTION(-0.5 < aEpsilon && aEpsilon < 0.5, "Nonsense epsilon value"); | |
| 20 return (WithinEpsilonOfInteger(x, aEpsilon) && | |
| 21 WithinEpsilonOfInteger(y, aEpsilon) && | |
| 22 WithinEpsilonOfInteger(width, aEpsilon) && | |
| 23 WithinEpsilonOfInteger(height, aEpsilon)); | |
| 24 } | |
| 25 | |
| 26 /* Clamp r to CAIRO_COORD_MIN .. CAIRO_COORD_MAX | |
| 27 * these are to be device coordinates. | |
| 28 * | |
| 29 * Cairo is currently using 24.8 fixed point, | |
| 30 * so -2^24 .. 2^24-1 is our valid | |
| 31 */ | |
| 32 | |
| 33 #define CAIRO_COORD_MAX (16777215.0) | |
| 34 #define CAIRO_COORD_MIN (-16777216.0) | |
| 35 | |
| 36 void | |
| 37 gfxRect::Condition() | |
| 38 { | |
| 39 // if either x or y is way out of bounds; | |
| 40 // note that we don't handle negative w/h here | |
| 41 if (x > CAIRO_COORD_MAX) { | |
| 42 x = CAIRO_COORD_MAX; | |
| 43 width = 0.0; | |
| 44 } | |
| 45 | |
| 46 if (y > CAIRO_COORD_MAX) { | |
| 47 y = CAIRO_COORD_MAX; | |
| 48 height = 0.0; | |
| 49 } | |
| 50 | |
| 51 if (x < CAIRO_COORD_MIN) { | |
| 52 width += x - CAIRO_COORD_MIN; | |
| 53 if (width < 0.0) | |
| 54 width = 0.0; | |
| 55 x = CAIRO_COORD_MIN; | |
| 56 } | |
| 57 | |
| 58 if (y < CAIRO_COORD_MIN) { | |
| 59 height += y - CAIRO_COORD_MIN; | |
| 60 if (height < 0.0) | |
| 61 height = 0.0; | |
| 62 y = CAIRO_COORD_MIN; | |
| 63 } | |
| 64 | |
| 65 if (x + width > CAIRO_COORD_MAX) { | |
| 66 width = CAIRO_COORD_MAX - x; | |
| 67 } | |
| 68 | |
| 69 if (y + height > CAIRO_COORD_MAX) { | |
| 70 height = CAIRO_COORD_MAX - y; | |
| 71 } | |
| 72 } | |
| 73 |
