rename to sponge

1 files changed, 35 insertions, 0 deletions

diff --git a/sponge.h b/sponge.h
new file mode 100644
index 0000000..dc50693
--- /dev/null
+++ b/sponge.h
@@ -0,0 +1,35 @@
+#include <stdint.h>
+
+typedef struct {
+    // TODO(kard): define byte order
+    uint32_t *pixels;
+    uint32_t width;
+    uint32_t height;
+    uint32_t stride;
+} sponge_Canvas;
+
+void sponge_clear(sponge_Canvas c, uint32_t color);
+void sponge_draw_rect(sponge_Canvas c, uint32_t x0, uint32_t y0, uint32_t x1, uint32_t y1, uint32_t color);
+
+// TODO(kard): prefix stripping
+
+#ifdef SPONGE_IMPLEMENTATION
+
+void sponge_clear(sponge_Canvas c, uint32_t color) {
+    sponge_draw_rect(c, 0, 0, c.width - 1, c.height - 1, color);
+}
+
+// TODO(kard): probably bounds checking
+// TODO(kard): alpha blending maybe
+void sponge_draw_rect(sponge_Canvas c, uint32_t x0, uint32_t y0, uint32_t x1, uint32_t y1, uint32_t color) {
+    uint32_t *row = c.pixels + (y0 * c.stride);
+
+    for (uint32_t y = y0; y <= y1; y++, row += c.stride) {
+        for (uint32_t x = x0; x <= x1; x++) {
+            row[x] = color;
+        }
+    }
+}
+
+#endif // SPONGE_IMPLEMENTATION
+