mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
4a051e26c3
- Copied methods from gfx3DMatrix to Matrix4x4, gfxPoint, and gfxRect that with at double-precision floating point.
127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "gfxRect.h"
|
|
|
|
#include "nsMathUtils.h"
|
|
|
|
#include "mozilla/gfx/Matrix.h"
|
|
|
|
#include "gfxQuad.h"
|
|
|
|
gfxQuad
|
|
gfxRect::TransformToQuad(const mozilla::gfx::Matrix4x4 &aMatrix) const
|
|
{
|
|
gfxPoint points[4];
|
|
|
|
points[0] = TopLeft();
|
|
points[1] = TopRight();
|
|
points[2] = BottomRight();
|
|
points[3] = BottomLeft();
|
|
|
|
points[0].Transform(aMatrix);
|
|
points[1].Transform(aMatrix);
|
|
points[2].Transform(aMatrix);
|
|
points[3].Transform(aMatrix);
|
|
|
|
// Could this ever result in lines that intersect? I don't think so.
|
|
return gfxQuad(points[0], points[1], points[2], points[3]);
|
|
}
|
|
|
|
void
|
|
gfxRect::TransformBounds(const mozilla::gfx::Matrix4x4 &aMatrix)
|
|
{
|
|
gfxPoint quad[4];
|
|
|
|
quad[0] = TopLeft();
|
|
quad[1] = TopRight();
|
|
quad[2] = BottomLeft();
|
|
quad[3] = BottomRight();
|
|
|
|
quad[0].Transform(aMatrix);
|
|
double min_x = quad[0].x;
|
|
double max_x = quad[0].x;
|
|
double min_y = quad[0].y;
|
|
double max_y = quad[0].y;
|
|
|
|
for (int i=1; i<4; i++) {
|
|
quad[i].Transform(aMatrix);
|
|
min_x = std::min(quad[i].x, min_x);
|
|
max_x = std::max(quad[i].x, max_x);
|
|
min_y = std::min(quad[i].y, min_y);
|
|
max_y = std::max(quad[i].y, max_y);
|
|
}
|
|
|
|
x = min_x;
|
|
y = min_y;
|
|
width = max_x - min_x;
|
|
height = max_y - min_y;
|
|
}
|
|
|
|
static bool
|
|
WithinEpsilonOfInteger(gfxFloat aX, gfxFloat aEpsilon)
|
|
{
|
|
return fabs(NS_round(aX) - aX) <= fabs(aEpsilon);
|
|
}
|
|
|
|
bool
|
|
gfxRect::WithinEpsilonOfIntegerPixels(gfxFloat aEpsilon) const
|
|
{
|
|
NS_ASSERTION(-0.5 < aEpsilon && aEpsilon < 0.5, "Nonsense epsilon value");
|
|
return (WithinEpsilonOfInteger(x, aEpsilon) &&
|
|
WithinEpsilonOfInteger(y, aEpsilon) &&
|
|
WithinEpsilonOfInteger(width, aEpsilon) &&
|
|
WithinEpsilonOfInteger(height, aEpsilon));
|
|
}
|
|
|
|
/* Clamp r to CAIRO_COORD_MIN .. CAIRO_COORD_MAX
|
|
* these are to be device coordinates.
|
|
*
|
|
* Cairo is currently using 24.8 fixed point,
|
|
* so -2^24 .. 2^24-1 is our valid
|
|
*/
|
|
|
|
#define CAIRO_COORD_MAX (16777215.0)
|
|
#define CAIRO_COORD_MIN (-16777216.0)
|
|
|
|
void
|
|
gfxRect::Condition()
|
|
{
|
|
// if either x or y is way out of bounds;
|
|
// note that we don't handle negative w/h here
|
|
if (x > CAIRO_COORD_MAX) {
|
|
x = CAIRO_COORD_MAX;
|
|
width = 0.0;
|
|
}
|
|
|
|
if (y > CAIRO_COORD_MAX) {
|
|
y = CAIRO_COORD_MAX;
|
|
height = 0.0;
|
|
}
|
|
|
|
if (x < CAIRO_COORD_MIN) {
|
|
width += x - CAIRO_COORD_MIN;
|
|
if (width < 0.0)
|
|
width = 0.0;
|
|
x = CAIRO_COORD_MIN;
|
|
}
|
|
|
|
if (y < CAIRO_COORD_MIN) {
|
|
height += y - CAIRO_COORD_MIN;
|
|
if (height < 0.0)
|
|
height = 0.0;
|
|
y = CAIRO_COORD_MIN;
|
|
}
|
|
|
|
if (x + width > CAIRO_COORD_MAX) {
|
|
width = CAIRO_COORD_MAX - x;
|
|
}
|
|
|
|
if (y + height > CAIRO_COORD_MAX) {
|
|
height = CAIRO_COORD_MAX - y;
|
|
}
|
|
}
|
|
|