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Fix rendering artifacts when Apply Zoom is disabled and bg grid isn't aligned with pixels (fix #1349)

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This commit is contained in:
David Capello 2016-12-28 12:43:13 -03:00
parent 41f44d9080
commit 19b52a68b9
1 changed files with 9 additions and 0 deletions
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9
src/render/render.cpp
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@ -19,6 +19,8 @@
#include "gfx/clip.h"
#include "gfx/region.h"
#include <cmath>
namespace render {
namespace {
@ -754,6 +756,13 @@ void Render::renderBackground(Image* image,
if (tile_w < zoom.apply(1)) tile_w = zoom.apply(1);
if (tile_h < zoom.apply(1)) tile_h = zoom.apply(1);
// Tiles must be aligned with pixels
double intpart;
if (std::modf(double(tile_w) / zoom.apply(1.0), &intpart) != 0.0)
tile_w = intpart*zoom.apply(1);
if (std::modf(double(tile_h) / zoom.apply(1.0), &intpart) != 0.0)
tile_h = intpart*zoom.apply(1);
if (tile_w < 1) tile_w = 1;
if (tile_h < 1) tile_h = 1;