Initial commit

Borrowing the app skeleton from Bitwise Harmony.

1 files changed, 58 insertions, 0 deletions

diff --git a/src/ui/paint.c b/src/ui/paint.c
new file mode 100644
index 00000000..0a2e6cd3
--- /dev/null
+++ b/src/ui/paint.c
@@ -0,0 +1,58 @@
+#include "paint.h"
+
+iLocalDef SDL_Renderer *renderer_Paint_(const iPaint *d) {
+    iAssert(d->dst);
+    return d->dst->render;
+}
+
+static void setColor_Paint_(const iPaint *d, int color) {
+    const iColor clr = get_Color(color & mask_ColorId);
+    SDL_SetRenderDrawColor(renderer_Paint_(d), clr.r, clr.g, clr.b, clr.a);
+}
+
+void init_Paint(iPaint *d) {
+    d->dst = get_Window();
+}
+
+void setClip_Paint(iPaint *d, iRect rect) {
+    SDL_RenderSetClipRect(renderer_Paint_(d), (const SDL_Rect *) &rect);
+}
+
+void clearClip_Paint(iPaint *d) {
+    const SDL_Rect winRect = { 0, 0, d->dst->root->rect.size.x, d->dst->root->rect.size.y };
+    SDL_RenderSetClipRect(renderer_Paint_(d), &winRect);
+}
+
+void drawRect_Paint(const iPaint *d, iRect rect, int color) {
+    iInt2 br = bottomRight_Rect(rect);
+    /* Keep the right/bottom edge visible in the window. */
+    if (br.x == d->dst->root->rect.size.x) br.x--;
+    if (br.y == d->dst->root->rect.size.y) br.y--;
+    const SDL_Point edges[] = {
+        { left_Rect(rect),  top_Rect(rect) },
+        { br.x, top_Rect(rect) },
+        { br.x, br.y },
+        { left_Rect(rect),  br.y },
+        { left_Rect(rect),  top_Rect(rect) }
+    };
+    setColor_Paint_(d, color);
+    SDL_RenderDrawLines(renderer_Paint_(d), edges, iElemCount(edges));
+}
+
+void drawRectThickness_Paint(const iPaint *d, iRect rect, int thickness, int color) {
+    thickness = iClamp(thickness, 1, 4);
+    while (thickness--) {
+        drawRect_Paint(d, rect, color);
+        shrink_Rect(&rect, one_I2());
+    }
+}
+
+void fillRect_Paint(const iPaint *d, iRect rect, int color) {
+    setColor_Paint_(d, color);
+    SDL_RenderFillRect(renderer_Paint_(d), (SDL_Rect *) &rect);
+}
+
+void drawLines_Paint(const iPaint *d, const iInt2 *points, size_t count, int color) {
+    setColor_Paint_(d, color);
+    SDL_RenderDrawLines(renderer_Paint_(d), (const SDL_Point *) points, count);
+}