GUAC-240: New rectangle helper methods and utilities which will be used by adaptive encoding. Rectangle helper unit tests.
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0d1396c815
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385808c7a1
@ -80,3 +80,190 @@ void guac_common_rect_constrain(guac_common_rect* rect, const guac_common_rect*
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}
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int guac_common_rect_expand_to_grid(int cell_size, guac_common_rect* rect,
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const guac_common_rect* max_rect) {
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/* Invalid cell_size received */
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if (cell_size <= 0)
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return -1;
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/* Nothing to do */
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if (cell_size == 1)
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return 0;
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/* Calculate how much the rectangle must be adjusted to fit within the
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* given cell size. */
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int dw = cell_size - rect->width % cell_size;
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int dh = cell_size - rect->height % cell_size;
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int dx = dw / 2;
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int dy = dh / 2;
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/* Set initial extents of adjusted rectangle. */
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int top = rect->y - dy;
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int left = rect->x - dx;
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int bottom = top + rect->height + dh;
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int right = left + rect->width + dw;
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/* The max rectangle */
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int max_left = max_rect->x;
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int max_top = max_rect->y;
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int max_right = max_left + max_rect->width;
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int max_bottom = max_top + max_rect->height;
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/* If the adjusted rectangle has sides beyond the max rectangle, or is larger
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* in any direction; shift or adjust the rectangle while trying to fit in
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* the grid */
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/* Adjust left/right */
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if (right > max_right) {
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/* shift to left */
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dw = right - max_right;
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right -= dw;
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left -= dw;
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/* clamp left if too far */
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if (left < max_left) {
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left = max_left;
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}
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}
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else if (left < max_left) {
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/* shift to right */
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dw = max_left - left;
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left += dw;
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right += dw;
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/* clamp right if too far */
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if (right > max_right) {
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right = max_right;
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}
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}
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/* Adjust top/bottom */
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if (bottom > max_bottom) {
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/* shift up */
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dh = bottom - max_bottom;
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bottom -= dh;
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top -= dh;
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/* clamp top if too far */
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if (top < max_top) {
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top = max_top;
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}
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}
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else if (top < max_top) {
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/* shift down */
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dh = max_top - top;
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top += dh;
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bottom += dh;
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/* clamp bottom if too far */
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if (bottom > max_bottom) {
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bottom = max_bottom;
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}
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}
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/* Commit rect */
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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return 0;
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}
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int guac_common_rect_intersects(const guac_common_rect* rect,
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const guac_common_rect* other) {
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/* Empty (no intersection) */
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if (other->x + other->width < rect->x || rect->x + rect->width < other->x ||
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other->y + other->height < rect->y || rect->y + rect->height < other->y) {
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return 0;
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}
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/* Complete */
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else if (other->x <= rect->x && (other->x + other->width) >= (rect->x + rect->width) &&
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other->y <= rect->y && (other->y + other->height) >= (rect->y + rect->height)) {
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return 2;
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}
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/* Partial intersection */
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return 1;
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}
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int guac_common_rect_clip_and_split(guac_common_rect* rect,
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const guac_common_rect* hole, guac_common_rect* split_rect) {
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/* Only continue if the rectangles intersects */
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if (!guac_common_rect_intersects(rect, hole))
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return 0;
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int top, left, bottom, right;
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/* Clip and split top */
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if (rect->y < hole->y) {
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top = rect->y;
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left = rect->x;
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bottom = hole->y;
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right = rect->x + rect->width;
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guac_common_rect_init(split_rect, left, top, right - left, bottom - top);
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/* Re-initialize original rect */
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top = hole->y;
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bottom = rect->y + rect->height;
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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return 1;
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}
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/* Clip and split left */
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else if (rect->x < hole->x) {
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top = rect->y;
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left = rect->x;
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bottom = rect->y + rect->height;
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right = hole->x;
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guac_common_rect_init(split_rect, left, top, right - left, bottom - top);
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/* Re-initialize original rect */
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left = hole->x;
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right = rect->x + rect->width;
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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return 1;
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}
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/* Clip and split bottom */
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else if (rect->y + rect->height > hole->y + hole->height) {
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top = hole->y + hole->height;
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left = rect->x;
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bottom = rect->y + rect->height;
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right = rect->x + rect->width;
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guac_common_rect_init(split_rect, left, top, right - left, bottom - top);
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/* Re-initialize original rect */
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top = rect->y;
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bottom = hole->y + hole->height;
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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return 1;
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}
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/* Clip and split right */
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else if (rect->x + rect->width > hole->x + hole->width) {
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top = rect->y;
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left = hole->x + hole->width;
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bottom = rect->y + rect->height;
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right = rect->x + rect->width;
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guac_common_rect_init(split_rect, left, top, right - left, bottom - top);
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/* Re-initialize original rect */
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left = rect->x;
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right = hole->x + hole->width;
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guac_common_rect_init(rect, left, top, right - left, bottom - top);
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return 1;
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}
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return 0;
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}
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@ -63,6 +63,27 @@ typedef struct guac_common_rect {
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*/
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void guac_common_rect_init(guac_common_rect* rect, int x, int y, int width, int height);
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/**
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* Expand the rectangle to fit an NxN grid.
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*
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* The rectangle will be shifted to the left and up, expanded and adjusted to
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* fit within the max bounding rect.
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*
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* @param cell_size
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* The (NxN) grid cell size.
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*
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* @param rect
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* The rectangle to adjust.
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*
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* @param max_rect
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* The bounding area in which the given rect can exist.
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*
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* @return
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* Zero on success, non-zero on error.
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*/
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int guac_common_rect_expand_to_grid(int cell_size, guac_common_rect* rect,
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const guac_common_rect* max_rect);
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/**
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* Extend the given rect such that it contains at least the specified minimum
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* rect.
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@ -81,5 +102,45 @@ void guac_common_rect_extend(guac_common_rect* rect, const guac_common_rect* min
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*/
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void guac_common_rect_constrain(guac_common_rect* rect, const guac_common_rect* max);
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/**
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* Check whether a rectangle intersects another.
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*
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* @param rect
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* Rectangle to check for intersection.
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*
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* @param other
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* The other rectangle.
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*
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* @return
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* Zero if no intersection, 1 if partial intersection,
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* 2 if first rect is completely inside the other.
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*/
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int guac_common_rect_intersects(const guac_common_rect* rect,
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const guac_common_rect* other);
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/**
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* Clip and split a rectangle into rectangles which are not covered by the
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* hole rectangle.
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*
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* This function will clip and split single edges when executed and must be
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* invoked until it returns zero. The edges are handled counter-clockwise
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* starting at the top edge.
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*
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* @param rect
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* The rectangle to be split. This rectangle will be clipped by the
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* split_rect.
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*
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* @param hole
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* The rectangle which represents the hole.
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*
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* @param split_rect
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* Resulting split rectangle.
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*
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* @return
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* Zero when no splits were done, non-zero when the rectangle was split.
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*/
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int guac_common_rect_clip_and_split(guac_common_rect* rect,
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const guac_common_rect* hole, guac_common_rect* split_rect);
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#endif
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@ -40,6 +40,7 @@ test_libguac_SOURCES = \
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common/common_suite.c \
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common/guac_iconv.c \
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common/guac_string.c \
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common/guac_rect.c \
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protocol/suite.c \
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protocol/base64_decode.c \
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protocol/instruction_parse.c \
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@ -48,6 +48,7 @@ int register_common_suite() {
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if (
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CU_add_test(suite, "guac-iconv", test_guac_iconv) == NULL
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|| CU_add_test(suite, "guac-string", test_guac_string) == NULL
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|| CU_add_test(suite, "guac-rect", test_guac_rect) == NULL
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) {
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CU_cleanup_registry();
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return CU_get_error();
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@ -49,5 +49,10 @@ void test_guac_string();
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*/
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void test_guac_iconv();
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/**
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* Unit test for rectangle calculation functions.
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*/
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void test_guac_rect();
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#endif
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292
tests/common/guac_rect.c
Normal file
292
tests/common/guac_rect.c
Normal file
@ -0,0 +1,292 @@
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/*
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* Copyright (C) 2015 Glyptodon LLC
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include "common_suite.h"
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#include "guac_rect.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <CUnit/Basic.h>
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void test_guac_rect() {
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guac_common_rect max;
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/*
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* Test init method
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*/
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guac_common_rect_init(&max, 0, 0, 100, 100);
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CU_ASSERT_EQUAL(0, max.x);
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CU_ASSERT_EQUAL(0, max.y);
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CU_ASSERT_EQUAL(100, max.width);
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CU_ASSERT_EQUAL(100, max.height);
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/*
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* Test constrain method
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*/
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guac_common_rect rect;
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guac_common_rect_init(&rect, -10, -10, 110, 110);
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guac_common_rect_init(&max, 0, 0, 100, 100);
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guac_common_rect_constrain(&rect, &max);
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CU_ASSERT_EQUAL(0, rect.x);
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CU_ASSERT_EQUAL(0, rect.y);
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CU_ASSERT_EQUAL(100, rect.width);
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CU_ASSERT_EQUAL(100, rect.height);
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/*
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* Test extend method
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*/
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guac_common_rect_init(&rect, 10, 10, 90, 90);
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guac_common_rect_init(&max, 0, 0, 100, 100);
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guac_common_rect_extend(&rect, &max);
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CU_ASSERT_EQUAL(0, rect.x);
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CU_ASSERT_EQUAL(0, rect.y);
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CU_ASSERT_EQUAL(100, rect.width);
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CU_ASSERT_EQUAL(100, rect.height);
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/*
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* Test adjust method
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*/
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int cell_size = 16;
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/* Simple adjustment */
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guac_common_rect_init(&rect, 0, 0, 25, 25);
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guac_common_rect_init(&max, 0, 0, 100, 100);
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guac_common_rect_expand_to_grid(cell_size, &rect, &max);
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CU_ASSERT_EQUAL(0, rect.x);
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CU_ASSERT_EQUAL(0, rect.y);
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CU_ASSERT_EQUAL(32, rect.width);
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CU_ASSERT_EQUAL(32, rect.height);
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/* Adjustment with moving of rect */
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guac_common_rect_init(&rect, 75, 75, 25, 25);
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guac_common_rect_init(&max, 0, 0, 100, 100);
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guac_common_rect_expand_to_grid(cell_size, &rect, &max);
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CU_ASSERT_EQUAL(max.width - 32, rect.x);
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CU_ASSERT_EQUAL(max.height - 32, rect.y);
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CU_ASSERT_EQUAL(32, rect.width);
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CU_ASSERT_EQUAL(32, rect.height);
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guac_common_rect_init(&rect, -5, -5, 25, 25);
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guac_common_rect_init(&max, 0, 0, 100, 100);
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guac_common_rect_expand_to_grid(cell_size, &rect, &max);
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CU_ASSERT_EQUAL(0, rect.x);
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CU_ASSERT_EQUAL(0, rect.y);
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CU_ASSERT_EQUAL(32, rect.width);
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CU_ASSERT_EQUAL(32, rect.height);
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/* Adjustment with moving and clamping of rect */
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guac_common_rect_init(&rect, 0, 0, 25, 15);
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guac_common_rect_init(&max, 0, 5, 32, 15);
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guac_common_rect_expand_to_grid(cell_size, &rect, &max);
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CU_ASSERT_EQUAL(max.x, rect.x);
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CU_ASSERT_EQUAL(max.y, rect.y);
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CU_ASSERT_EQUAL(max.width, rect.width);
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CU_ASSERT_EQUAL(max.height, rect.height);
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/*
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* Rectangle intersection tests
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*/
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guac_common_rect min;
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guac_common_rect_init(&min, 10, 10, 10, 10);
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/* Rectangle intersection - empty
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* rectangle is outside */
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guac_common_rect_init(&rect, 25, 25, 5, 5);
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int res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(0, res);
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/* Rectangle intersection - complete
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* rectangle is completely inside */
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guac_common_rect_init(&rect, 11, 11, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(2, res);
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/* Rectangle intersection - partial
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* rectangle intersects UL */
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guac_common_rect_init(&rect, 8, 8, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(1, res);
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/* Rectangle intersection - partial
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* rectangle intersects LR */
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guac_common_rect_init(&rect, 18, 18, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(1, res);
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/* Rectangle intersection - complete
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* rect intersects along UL but inside */
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guac_common_rect_init(&rect, 10, 10, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(2, res);
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/* Rectangle intersection - partial
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* rectangle intersects along L but outside */
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guac_common_rect_init(&rect, 5, 10, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(1, res);
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/* Rectangle intersection - complete
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* rectangle intersects along LR but rest is inside */
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guac_common_rect_init(&rect, 15, 15, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(2, res);
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/* Rectangle intersection - partial
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* rectangle intersects along R but rest is outside */
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guac_common_rect_init(&rect, 20, 10, 5, 5);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(1, res);
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/* Rectangle intersection - partial
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* rectangle encloses min; which is a partial intersection */
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guac_common_rect_init(&rect, 5, 5, 20, 20);
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res = guac_common_rect_intersects(&rect, &min);
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CU_ASSERT_EQUAL(1, res);
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/*
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* Basic test of clip and split method
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*/
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guac_common_rect_init(&min, 10, 10, 10, 10);
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guac_common_rect cut;
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/* Clip top */
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guac_common_rect_init(&rect, 10, 5, 10, 10);
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res = guac_common_rect_clip_and_split(&rect, &min, &cut);
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CU_ASSERT_EQUAL(1, res);
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CU_ASSERT_EQUAL(10, cut.x);
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CU_ASSERT_EQUAL(5, cut.y);
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CU_ASSERT_EQUAL(10, cut.width);
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CU_ASSERT_EQUAL(5, cut.height);
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CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(10, rect.width);
|
||||
CU_ASSERT_EQUAL(5, rect.height);
|
||||
|
||||
/* Clip bottom */
|
||||
guac_common_rect_init(&rect, 10, 15, 10, 10);
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(10, cut.x);
|
||||
CU_ASSERT_EQUAL(20, cut.y);
|
||||
CU_ASSERT_EQUAL(10, cut.width);
|
||||
CU_ASSERT_EQUAL(5, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(15, rect.y);
|
||||
CU_ASSERT_EQUAL(10, rect.width);
|
||||
CU_ASSERT_EQUAL(5, rect.height);
|
||||
|
||||
/* Clip left */
|
||||
guac_common_rect_init(&rect, 5, 10, 10, 10);
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(5, cut.x);
|
||||
CU_ASSERT_EQUAL(10, cut.y);
|
||||
CU_ASSERT_EQUAL(5, cut.width);
|
||||
CU_ASSERT_EQUAL(10, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(5, rect.width);
|
||||
CU_ASSERT_EQUAL(10, rect.height);
|
||||
|
||||
/* Clip right */
|
||||
guac_common_rect_init(&rect, 15, 10, 10, 10);
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(20, cut.x);
|
||||
CU_ASSERT_EQUAL(10, cut.y);
|
||||
CU_ASSERT_EQUAL(5, cut.width);
|
||||
CU_ASSERT_EQUAL(10, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(15, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(5, rect.width);
|
||||
CU_ASSERT_EQUAL(10, rect.height);
|
||||
|
||||
/*
|
||||
* Test a rectangle which completely covers the hole.
|
||||
* Clip and split until done.
|
||||
*/
|
||||
guac_common_rect_init(&rect, 5, 5, 20, 20);
|
||||
|
||||
/* Clip top */
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(5, cut.x);
|
||||
CU_ASSERT_EQUAL(5, cut.y);
|
||||
CU_ASSERT_EQUAL(20, cut.width);
|
||||
CU_ASSERT_EQUAL(5, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(5, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(20, rect.width);
|
||||
CU_ASSERT_EQUAL(15, rect.height);
|
||||
|
||||
/* Clip left */
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(5, cut.x);
|
||||
CU_ASSERT_EQUAL(10, cut.y);
|
||||
CU_ASSERT_EQUAL(5, cut.width);
|
||||
CU_ASSERT_EQUAL(15, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(15, rect.width);
|
||||
CU_ASSERT_EQUAL(15, rect.height);
|
||||
|
||||
/* Clip bottom */
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(1, res);
|
||||
CU_ASSERT_EQUAL(10, cut.x);
|
||||
CU_ASSERT_EQUAL(20, cut.y);
|
||||
CU_ASSERT_EQUAL(15, cut.width);
|
||||
CU_ASSERT_EQUAL(5, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(15, rect.width);
|
||||
CU_ASSERT_EQUAL(10, rect.height);
|
||||
|
||||
/* Clip right */
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(20, cut.x);
|
||||
CU_ASSERT_EQUAL(10, cut.y);
|
||||
CU_ASSERT_EQUAL(5, cut.width);
|
||||
CU_ASSERT_EQUAL(10, cut.height);
|
||||
|
||||
CU_ASSERT_EQUAL(10, rect.x);
|
||||
CU_ASSERT_EQUAL(10, rect.y);
|
||||
CU_ASSERT_EQUAL(10, rect.width);
|
||||
CU_ASSERT_EQUAL(10, rect.height);
|
||||
|
||||
/* Make sure nothing is left to do */
|
||||
res = guac_common_rect_clip_and_split(&rect, &min, &cut);
|
||||
CU_ASSERT_EQUAL(0, res);
|
||||
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user