Add growing rectangle demo

1 files changed, 80 insertions, 2 deletions

diff --git a/src/main.c b/src/main.c
index 2ad4877..dcefc30 100644
--- a/src/main.c
+++ b/src/main.c
@@ -139,6 +139,83 @@ test_all_static(void) {
 }
 
 void
+test_growing_rects(void) {
+    typedef struct Rect {
+        int x0;
+        int y0;
+        int x1;
+        int y1;
+    } Rect;
+    Rect rects[] = {
+        {
+            SCREEN_WIDTH / 2 - 60,
+            SCREEN_HEIGHT / 2 - 30,
+            SCREEN_WIDTH / 2 + 60,
+            SCREEN_HEIGHT / 2 + 30,
+        },
+        {
+            SCREEN_WIDTH / 2 - 30,
+            SCREEN_HEIGHT / 2 - 60,
+            SCREEN_WIDTH / 2 + 30,
+            SCREEN_HEIGHT / 2 + 60,
+        },
+    };
+    while (true) {
+        poll_keys();
+        if (key_tap(KEY_A)) {
+            break;
+        }
+        if (key_pressed(KEY_B)) {
+            if (key_pressed(KEY_LEFT)) {
+                rects[0].x0 = CLAMP(rects[0].x0 - 1, 0, SCREEN_WIDTH - 1);
+                rects[0].x1 = CLAMP(rects[0].x1 + 1, 0, SCREEN_WIDTH - 1);
+            } else if (key_pressed(KEY_RIGHT)){
+                rects[0].x0 = CLAMP(rects[0].x0 + 1, 0, SCREEN_WIDTH - 1);
+                rects[0].x1 = CLAMP(rects[0].x1 - 1, 0, SCREEN_WIDTH - 1);
+            } else if (key_pressed(KEY_UP)){
+                rects[0].y0 = CLAMP(rects[0].y0 - 1, 0, SCREEN_HEIGHT - 1);
+                rects[0].y1 = CLAMP(rects[0].y1 + 1, 0, SCREEN_HEIGHT - 1);
+            } else if (key_pressed(KEY_DOWN)){
+                rects[0].y0 = CLAMP(rects[0].y0 + 1, 0, SCREEN_HEIGHT - 1);
+                rects[0].y1 = CLAMP(rects[0].y1 - 1, 0, SCREEN_HEIGHT - 1);
+            }
+        } else {
+            if (key_pressed(KEY_LEFT)) {
+                rects[1].x0 = CLAMP(rects[1].x0 - 1, 0, SCREEN_WIDTH - 1);
+                rects[1].x1 = CLAMP(rects[1].x1 + 1, 0, SCREEN_WIDTH - 1);
+            } else if (key_pressed(KEY_RIGHT)){
+                rects[1].x0 = CLAMP(rects[1].x0 + 1, 0, SCREEN_WIDTH - 1);
+                rects[1].x1 = CLAMP(rects[1].x1 - 1, 0, SCREEN_WIDTH - 1);
+            } else if (key_pressed(KEY_UP)){
+                rects[1].y0 = CLAMP(rects[1].y0 - 1, 0, SCREEN_HEIGHT - 1);
+                rects[1].y1 = CLAMP(rects[1].y1 + 1, 0, SCREEN_HEIGHT - 1);
+            } else if (key_pressed(KEY_DOWN)){
+                rects[1].y0 = CLAMP(rects[1].y0 + 1, 0, SCREEN_HEIGHT - 1);
+                rects[1].y1 = CLAMP(rects[1].y1 - 1, 0, SCREEN_HEIGHT - 1);
+            }
+        }
+        bios_vblank_wait();
+        FRAME_START();
+        PROF(flip_buffer(), flip_cycles);
+        PROF(screen_fill(0), clear_cycles);
+        PROF(draw_filled_rect(
+                rects[0].x0,
+                rects[0].y0,
+                rects[0].x1,
+                rects[0].y1,
+                2), rect_cycles);
+        PROF(draw_rect(
+                rects[1].x0,
+                rects[1].y0,
+                rects[1].x1,
+                rects[1].y1,
+                3), fill_rect_cycles);
+        FRAME_END();
+        PROF_SHOW();
+    }
+}
+
+void
 test_sprites_bounce(void) {
     u8 sprite_icn[8] = {
         0xf8, 0xf8, 0xf8, 0xf8 | 0x3e, 0xf8 | 0x3e, 0x3e, 0x3e, 0x00,
@@ -226,9 +303,10 @@ int main(void) {
     irs_set(IRQ_VBLANK, irs_stub);
 
     // TODO: Test for text rendering.
-    // TODO: Verify all works well, there were some modifications and
-    // bugfixes on the ppu of the uxngba branch.
+    // TODO: Add a clear mode for chr that inverts non zero values to become
+    // zero, thus clearing the sprite if it was in the same position.
     while (true) {
+        test_growing_rects();
         test_sprites_bounce();
         test_moving_line();
         test_all_static();