// saveCursor saves the pixels under the mouse cursor
void saveCursor(VGImage CursorBuffer, int curx, int cury, int screen_width, int screen_height, int s) {
int sx, sy, ex, ey;
sx = curx - s; // horizontal
if (sx < 0) {
sx = 0;
}
ex = curx + s;
if (ex > screen_width) {
ex = screen_width;
}
cur_sx = sx;
cur_w = ex - sx;
sy = cury - s; // vertical
if (sy < 0) {
sy = 0;
}
ey = cury + s;
if (ey > screen_height) {
ey = screen_height;
}
cur_sy = sy;
cur_h = ey - sy;
vgGetPixels(CursorBuffer, 0, 0, cur_sx, cur_sy, cur_w, cur_h);
cur_saved = cur_w * cur_h;
}
static void
draw(void)
{
const VGint w = 48;
VGImage img1, img2;
VGint x, y;
vgSetfv(VG_CLEAR_COLOR, 4, white);
vgClear(0, 0, window_width(), window_height());
img1 = vgCreateImage(VG_sRGBA_8888, w, w,
VG_IMAGE_QUALITY_NONANTIALIASED);
img2 = vgCreateImage(VG_sRGBA_8888, w, w,
VG_IMAGE_QUALITY_NONANTIALIASED);
x = 5;
y = (window_height() - w) / 2;
/* test vgSetPixels */
vgSetfv(VG_CLEAR_COLOR, 4, red);
vgClearImage(img1, 0, 0, w, w / 2);
vgSetfv(VG_CLEAR_COLOR, 4, black);
vgClearImage(img1, 0, w / 2, w, w / 2);
vgSetPixels(x, y, img1, 0, 0, w, w);
x += w + 5;
/* test vgDrawImage */
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
vgLoadIdentity();
vgTranslate(x, y);
vgDrawImage(img1);
/* test vgGetPixels */
vgGetPixels(img1, 0, 0, x, y, w, w);
x += w + 5;
vgSetPixels(x, y, img1, 0, 0, w, w);
x += w + 5;
/* test vgCopyImage */
vgCopyImage(img2, 0, 0, img1, 0, 0, w, w, VG_FALSE);
vgSetPixels(x, y, img2, 0, 0, w, w);
/* vgCopyPixels */
vgCopyPixels(x + w + 5, y, x, y, w, w);
vgDestroyImage(img1);
vgDestroyImage(img2);
}