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#include "eglcommon.h"
#include <VG/openvg.h>
const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
const VGfloat green_color[4] = {0.0, 1.0, 0.0, 0.8};
const VGfloat black_color[4] = {0.0, 0.0, 0.0, 1.0};
VGPath path;
VGPaint fill;
static void draw_point(VGfloat x, VGfloat y)
{
static const VGubyte cmds[] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS,
VG_LINE_TO_ABS, VG_CLOSE_PATH};
const VGfloat coords[] = { x - 2, y - 2,
x + 2, y - 2,
x + 2, y + 2,
x - 2, y + 2};
VGPath path;
VGPaint fill;
path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
VG_PATH_CAPABILITY_ALL);
vgAppendPathData(path, 5, cmds, coords);
fill = vgCreatePaint();
vgSetParameterfv(fill, VG_PAINT_COLOR, 4, black_color);
vgSetPaint(fill, VG_FILL_PATH);
vgDrawPath(path, VG_FILL_PATH);
vgDestroyPath(path);
vgDestroyPaint(fill);
}
static void draw_marks(VGPath path)
{
VGfloat point[2], tangent[2];
int i = 0;
for (i = 0; i < 1300; i += 50) {
vgPointAlongPath(path, 0, 6, i,
point + 0, point + 1,
tangent + 0, tangent + 1);
draw_point(point[0], point[1]);
}
}
static void
init(void)
{
static const VGubyte cmds[6] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS,
VG_LINE_TO_ABS, VG_CLOSE_PATH};
static const VGfloat coords[] = { 0, 200,
300, 200,
50, 0,
150, 300,
250, 0};
path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
VG_PATH_CAPABILITY_ALL);
vgAppendPathData(path, 6, cmds, coords);
fill = vgCreatePaint();
vgSetParameterfv(fill, VG_PAINT_COLOR, 4, green_color);
vgSetPaint(fill, VG_FILL_PATH);
vgSetfv(VG_CLEAR_COLOR, 4, white_color);
}
/* new window size or exposure */
static void
reshape(int w, int h)
{
vgLoadIdentity();
}
static void
draw(void)
{
VGfloat point[2], tangent[2];
int i = 0;
vgClear(0, 0, window_width(), window_height());
vgSetPaint(fill, VG_FILL_PATH);
vgDrawPath(path, VG_FILL_PATH);
draw_marks(path);
vgFlush();
}
int main(int argc, char **argv)
{
return run(argc, argv, init, reshape,
draw, 0);
}
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