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pdfrenderer: Fix ClipBaseline and optimize code

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The division was made with integers, giving a wrong result.

* Avoid division and use pure integer operations.
* Add missing "static" attribute.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
This commit is contained in:
Stefan Weil 2018-07-01 08:33:56 +02:00
parent a414443fc4
commit 6801085376
1 changed files with 6 additions and 6 deletions
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8
src/api/pdfrenderer.cpp
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@ -293,16 +293,16 @@ void AffineMatrix(int writing_direction,
// these viewers. I chose this threshold large enough to absorb noise,
// but small enough that lines probably won't cross each other if the
// whole page is tilted at almost exactly the clipping threshold.
void ClipBaseline(int ppi, int x1, int y1, int x2, int y2,
static void ClipBaseline(int ppi, int x1, int y1, int x2, int y2,
int *line_x1, int *line_y1,
int *line_x2, int *line_y2) {
*line_x1 = x1;
*line_y1 = y1;
*line_x2 = x2;
*line_y2 = y2;
double rise = abs(y2 - y1) * 72 / ppi;
double run = abs(x2 - x1) * 72 / ppi;
if (rise < 2.0 && 2.0 < run)
int rise = abs(y2 - y1) * 72;
int run = abs(x2 - x1) * 72;
if (rise < 2 * ppi && 2 * ppi < run)
*line_y1 = *line_y2 = (y1 + y2) / 2;
}