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change rendering technique for waveforms, add back optional gradient, add back amplitude scaling, add rgb/hsv conversion utilities to canvas

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This commit is contained in:
Paul Davis 2013-04-16 14:04:59 -04:00
parent abba366fce
commit ccc9b6adee
5 changed files with 209 additions and 24 deletions
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9
libs/canvas/canvas/utils.h
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@ -21,7 +21,12 @@
namespace ArdourCanvas {
extern void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Color);
extern void color_to_hsv (Color color, double& h, double& s, double& v);
extern Color hsv_to_color (double h, double s, double v, double a);
extern void color_to_rgba (Color, double& r, double& g, double& b, double& a);
extern Color rgba_to_color (double r, double g, double b, double a);
extern void set_source_rgba (Cairo::RefPtr<Cairo::Context>, Color);
}