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audiovisualizers: streamline the line_aa code

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Have a reusable dot_aa code and reuse in the line drawing.
This commit is contained in:
Stefan Sauer 2011-11-25 22:32:11 +01:00
parent 65e8564343
commit 52d185f4ae
1 changed files with 18 additions and 37 deletions
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55
gst/audiovisualizers/gstdrawhelpers.h
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@ -24,6 +24,20 @@
_vd[(_y * _st) + _x] = _c; \
} G_STMT_END
#define draw_dot_aa(_vd, _x, _y, _st, _c, _f) G_STMT_START { \
guint32 _oc, _nc, _c1, _c2, _c3; \
\
_oc = _vd[(_y * _st) + _x]; \
_c3 = (_oc & 0xff) + ((_c & 0xff) * _f); \
_c3 = MIN(_c3, 255); \
_c2 = ((_oc & 0xff00) >> 8) + (((_c & 0xff00) >> 8) * _f); \
_c2 = MIN(_c2, 255); \
_c1 = ((_oc & 0xff0000) >> 16) + (((_c & 0xff0000) >> 16) * _f); \
_c1 = MIN(_c1, 255); \
_nc = (_c1 << 16) | (_c2 << 8) | _c3; \
_vd[(_y * _st) + _x] = _nc; \
} G_STMT_END
#define draw_line(_vd, _x1, _x2, _y1, _y2, _st, _c) G_STMT_START { \
guint _i, _j, _x, _y; \
gint _dx = _x2 - _x1, _dy = _y2 - _y1; \
@ -42,7 +56,6 @@
guint _i, _j, _x, _y; \
gint _dx = _x2 - _x1, _dy = _y2 - _y1; \
gfloat _f, _rx, _ry, _fx, _fy; \
guint32 _oc, _nc, _c1, _c2, _c3; \
\
_j = abs (_dx) > abs (_dy) ? abs (_dx) : abs (_dy); \
for (_i = 0; _i < _j; _i++) { \
@ -55,48 +68,16 @@
_fy = _ry - (gfloat)_y; \
\
_f = ((1.0 - _fx) + (1.0 - _fy)) / 2.0; \
_oc = _vd[(_y * _st) + _x]; \
_c3 = (_oc & 0xff) + ((_c & 0xff) * _f); \
_c3 = MIN(_c3, 255); \
_c2 = ((_oc & 0xff00) >> 8) + (((_c & 0xff00) >> 8) * _f); \
_c2 = MIN(_c2, 255); \
_c1 = ((_oc & 0xff0000) >> 16) + (((_c & 0xff0000) >> 16) * _f); \
_c1 = MIN(_c1, 255); \
_nc = 0x00 | (_c1 << 16) | (_c2 << 8) | _c3; \
_vd[(_y * _st) + _x] = _nc; \
draw_dot_aa (_vd, _x, _y, _st, _c, _f); \
\
_f = (_fx + (1.0 - _fy)) / 2.0; \
_oc = _vd[(_y * _st) + _x + 1]; \
_c3 = (_oc & 0xff) + ((_c & 0xff) * _f); \
_c3 = MIN(_c3, 255); \
_c2 = ((_oc & 0xff00) >> 8) + (((_c & 0xff00) >> 8) * _f); \
_c2 = MIN(_c2, 255); \
_c1 = ((_oc & 0xff0000) >> 16) + (((_c & 0xff0000) >> 16) * _f); \
_c1 = MIN(_c1, 255); \
_nc = 0x00 | (_c1 << 16) | (_c2 << 8) | _c3; \
_vd[(_y * _st) + _x + 1] = _nc; \
draw_dot_aa (_vd, (_x + 1), _y, _st, _c, _f); \
\
_f = ((1.0 - _fx) + _fy) / 2.0; \
_oc = _vd[((_y + 1) * _st) + _x]; \
_c3 = (_oc & 0xff) + ((_c & 0xff) * _f); \
_c3 = MIN(_c3, 255); \
_c2 = ((_oc & 0xff00) >> 8) + (((_c & 0xff00) >> 8) * _f); \
_c2 = MIN(_c2, 255); \
_c1 = ((_oc & 0xff0000) >> 16) + (((_c & 0xff0000) >> 16) * _f); \
_c1 = MIN(_c1, 255); \
_nc = 0x00 | (_c1 << 16) | (_c2 << 8) | _c3; \
_vd[((_y + 1) * _st) + _x] = _nc; \
draw_dot_aa (_vd, _x, (_y + 1), _st, _c, _f); \
\
_f = (_fx + _fy) / 2.0; \
_oc = _vd[((_y + 1) * _st) + _x + 1]; \
_c3 = (_oc & 0xff) + ((_c & 0xff) * _f); \
_c3 = MIN(_c3, 255); \
_c2 = ((_oc & 0xff00) >> 8) + (((_c & 0xff00) >> 8) * _f); \
_c2 = MIN(_c2, 255); \
_c1 = ((_oc & 0xff0000) >> 16) + (((_c & 0xff0000) >> 16) * _f); \
_c1 = MIN(_c1, 255); \
_nc = 0x00 | (_c1 << 16) | (_c2 << 8) | _c3; \
_vd[((_y + 1) * _st) + _x + 1] = _nc; \
draw_dot_aa (_vd, (_x + 1), (_y + 1), _st, _c, _f); \
} \
} G_STMT_END