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sw_engine: rasterization region edited in the case of fast tracking

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Since no antialiasing is applied for the fastTracking cases,
the shape's rasterization region needs to be edited. To establish
the rastered bbox, the rounding is performed before the bbox corners
are casted to the SwCoords.
This commit is contained in:
Mira Grudzinska 2021-10-23 21:31:02 +02:00 • committed by Hermet Park
parent 07d4db0555
commit babb10b7f3
1 changed files with 28 additions and 2 deletions
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30
src/lib/sw_engine/tvgSwShape.cpp
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@ -22,6 +22,7 @@
#include "tvgSwCommon.h"
#include "tvgBezier.h"
#include <float.h>
#include <math.h>
/************************************************************************/
/* Internal Class Implementation */
@ -508,8 +509,33 @@ bool shapeGenRle(SwShape* shape, TVG_UNUSED const Shape* sdata, bool antiAlias,
//if (shape.outline->opened) return true;
//Case A: Fast Track Rectangle Drawing
if (!hasComposite && (shape->rect = _fastTrack(shape->outline))) return true;
//Case B: Normale Shape RLE Drawing
if (!hasComposite && (shape->rect = _fastTrack(shape->outline))) {
//Since no antialiasing is applied in the Fast Track case,
//the rasterization region has to be modified
auto corner1 = shape->outline->pts;
auto corner3 = shape->outline->pts + 2;
auto xMin = corner1->x;
auto xMax = corner3->x;
if (xMin > xMax) {
xMax = xMin;
xMin = corner3->x;
}
auto yMin = corner1->y;
auto yMax = corner3->y;
if (yMin > yMax) {
yMax = yMin;
yMin = corner3->y;
}
shape->bbox.min.x = static_cast<SwCoord>(round(xMin / 64.0f));
shape->bbox.max.x = static_cast<SwCoord>(round(xMax / 64.0f));
shape->bbox.min.y = static_cast<SwCoord>(round(yMin / 64.0f));
shape->bbox.max.y = static_cast<SwCoord>(round(yMax / 64.0f));
return true;
}
//Case B: Normal Shape RLE Drawing
if ((shape->rle = rleRender(shape->rle, shape->outline, shape->bbox, antiAlias))) return true;
return false;