103 lines
2.5 KiB
C
103 lines
2.5 KiB
C
#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);
|
|
}
|