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Avoid RotSprite for 90/180 degree rotations

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Reported several times:
https://community.aseprite.org/t/better-90-180-rotation-from-menu/2937
https://community.aseprite.org/t/rotate-90-should-not-use-rotsprite/3267
https://community.aseprite.org/t/improvements-to-rotsprite/3613/4
https://community.aseprite.org/t/buggy-90-degree-rotation/3793
This commit is contained in:
David Capello 2019-09-03 14:57:23 -03:00
parent dcdde74cba
commit 47ff85e871
1 changed files with 7 additions and 5 deletions
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12
src/app/ui/editor/pixels_movement.cpp
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@ -736,11 +736,13 @@ void PixelsMovement::drawParallelogram(
{
tools::RotationAlgorithm rotAlgo = Preferences::instance().selection.rotationAlgorithm();
// If the angle and the scale weren't modified, we should use the
// fast rotation algorithm, as it's pixel-perfect match with the
// original selection when just a translation is applied.
if (m_currentData.angle() == 0.0 &&
gfx::Rect(m_currentData.bounds()).size() == src->size()) {
// When the scale isn't modified and we have no rotation or a
// right/straight-angle, we should use the fast rotation algorithm,
// as it's pixel-perfect match with the original selection when just
// a translation is applied.
double angle = 180.0*m_currentData.angle()/PI;
if (std::fabs(std::fmod(std::fabs(angle), 90.0)) < 0.01 ||
std::fabs(std::fmod(std::fabs(angle), 90.0)-90.0) < 0.01) {
rotAlgo = tools::RotationAlgorithm::FAST;
}