diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qtriangulatingstroker_p.h')
| -rw-r--r-- | src/opengl/gl2paintengineex/qtriangulatingstroker_p.h | 158 |
1 files changed, 5 insertions, 153 deletions
diff --git a/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h b/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h index a0117d5..2dba0ce 100644 --- a/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h +++ b/src/opengl/gl2paintengineex/qtriangulatingstroker_p.h @@ -43,6 +43,7 @@ #define QTRIANGULATINGSTROKER_P_H #include <private/qdatabuffer_p.h> +#include <qvarlengtharray.h> #include <private/qvectorpath_p.h> #include <private/qbezier_p.h> #include <private/qnumeric_p.h> @@ -62,13 +63,13 @@ public: private: inline void emitLineSegment(float x, float y, float nx, float ny); - inline void moveTo(const qreal *pts); + void moveTo(const qreal *pts); inline void lineTo(const qreal *pts); void cubicTo(const qreal *pts); - inline void join(const qreal *pts); + void join(const qreal *pts); inline void normalVector(float x1, float y1, float x2, float y2, float *nx, float *ny); - inline void endCap(const qreal *pts); - inline void arc(float x, float y); + void endCap(const qreal *pts); + void arcPoints(float cx, float cy, float fromX, float fromY, float toX, float toY, QVarLengthArray<float> &points); void endCapOrJoinClosed(const qreal *start, const qreal *cur, bool implicitClose, bool endsAtStart); @@ -116,10 +117,6 @@ private: qreal m_inv_scale; }; - - - - inline void QTriangulatingStroker::normalVector(float x1, float y1, float x2, float y2, float *nx, float *ny) { @@ -139,8 +136,6 @@ inline void QTriangulatingStroker::normalVector(float x1, float y1, float x2, fl *ny = dx * pw; } - - inline void QTriangulatingStroker::emitLineSegment(float x, float y, float vx, float vy) { m_vertices.add(x + vx); @@ -149,103 +144,6 @@ inline void QTriangulatingStroker::emitLineSegment(float x, float y, float vx, f m_vertices.add(y - vy); } - - -// We draw a full circle for any round join or round cap which is a -// bit of overkill... -inline void QTriangulatingStroker::arc(float x, float y) -{ - float dx = m_width; - float dy = 0; - for (int i=0; i<=m_roundness; ++i) { - float tmpx = dx * m_cos_theta - dy * m_sin_theta; - float tmpy = dx * m_sin_theta + dy * m_cos_theta; - dx = tmpx; - dy = tmpy; - emitLineSegment(x, y, dx, dy); - } -} - - - -inline void QTriangulatingStroker::endCap(const qreal *pts) -{ - switch (m_cap_style) { - case Qt::FlatCap: - break; - case Qt::SquareCap: { - float dx = m_cx - *(pts - 2); - float dy = m_cy - *(pts - 1); - - float len = m_width / sqrt(dx * dx + dy * dy); - dx = dx * len; - dy = dy * len; - - emitLineSegment(m_cx + dx, m_cy + dy, m_nvx, m_nvy); - break; } - case Qt::RoundCap: - arc(m_cx, m_cy); - break; - default: break; // to shut gcc up... - } -} - - -void QTriangulatingStroker::moveTo(const qreal *pts) -{ - m_cx = pts[0]; - m_cy = pts[1]; - - float x2 = pts[2]; - float y2 = pts[3]; - normalVector(m_cx, m_cy, x2, y2, &m_nvx, &m_nvy); - - - // To acheive jumps we insert zero-area tringles. This is done by - // adding two identical points in both the end of previous strip - // and beginning of next strip - bool invisibleJump = m_vertices.size(); - - switch (m_cap_style) { - case Qt::FlatCap: - if (invisibleJump) { - m_vertices.add(m_cx + m_nvx); - m_vertices.add(m_cy + m_nvy); - } - break; - case Qt::SquareCap: { - float dx = x2 - m_cx; - float dy = y2 - m_cy; - float len = m_width / sqrt(dx * dx + dy * dy); - dx = dx * len; - dy = dy * len; - float sx = m_cx - dx; - float sy = m_cy - dy; - if (invisibleJump) { - m_vertices.add(sx + m_nvx); - m_vertices.add(sy + m_nvy); - } - emitLineSegment(sx, sy, m_nvx, m_nvy); - break; } - case Qt::RoundCap: - if (invisibleJump) { - m_vertices.add(m_cx + m_nvx); - m_vertices.add(m_cy + m_nvy); - } - - // This emitLineSegment is not needed for the arc, but we need - // to start where we put the invisibleJump vertex, otherwise - // we'll have visible triangles between subpaths. - emitLineSegment(m_cx, m_cy, m_nvx, m_nvy); - arc(m_cx, m_cy); - break; - default: break; // ssssh gcc... - } - emitLineSegment(m_cx, m_cy, m_nvx, m_nvy); -} - - - void QTriangulatingStroker::lineTo(const qreal *pts) { emitLineSegment(pts[0], pts[1], m_nvx, m_nvy); @@ -253,52 +151,6 @@ void QTriangulatingStroker::lineTo(const qreal *pts) m_cy = pts[1]; } - - -void QTriangulatingStroker::join(const qreal *pts) -{ - // Creates a join to the next segment (m_cx, m_cy) -> (pts[0], pts[1]) - normalVector(m_cx, m_cy, pts[0], pts[1], &m_nvx, &m_nvy); - - switch (m_join_style) { - case Qt::BevelJoin: - break; - case Qt::MiterJoin: { - int p1 = m_vertices.size() - 6; - int p2 = m_vertices.size() - 2; - QLineF line(m_vertices.at(p1), m_vertices.at(p1+1), - m_vertices.at(p2), m_vertices.at(p2+1)); - QLineF nextLine(m_cx - m_nvx, m_cy - m_nvy, - pts[0] - m_nvx, pts[1] - m_nvy); - - QPointF isect; - if (line.intersect(nextLine, &isect) != QLineF::NoIntersection - && QLineF(line.p2(), isect).length() <= m_miter_limit) { - // The intersection point mirrored over the m_cx, m_cy point - m_vertices.add(m_cx - (isect.x() - m_cx)); - m_vertices.add(m_cy - (isect.y() - m_cy)); - - // The intersection point - m_vertices.add(isect.x()); - m_vertices.add(isect.y()); - } - // else - // Do a plain bevel join if the miter limit is exceeded or if - // the lines are parallel. This is not what the raster - // engine's stroker does, but it is both faster and similar to - // what some other graphics API's do. - - break; } - case Qt::RoundJoin: - arc(m_cx, m_cy); - break; - - default: break; // gcc warn-- - } - - emitLineSegment(m_cx, m_cy, m_nvx, m_nvy); -} - QT_END_NAMESPACE #endif |