Impl basic sprite rendering

1 files changed, 16 insertions, 0 deletions

diff --git a/vdp.hpp b/vdp.hpp
index e811422..f506ca4 100644
--- a/vdp.hpp
+++ b/vdp.hpp
@@ -8,6 +8,19 @@
 #include <cstddef>
 #include <cstring>
 
+struct SpriteAttributeEntry {
+    uint16_t vpos;
+    uint16_t hpos;
+    uint16_t tile_id;
+    uint8_t link;
+    uint8_t palette_id;
+    uint8_t priority;
+    uint8_t vreverse;
+    uint8_t hreverse;
+    uint8_t vsize;
+    uint8_t hsize;
+};
+
 class VDP {
     public:
         constexpr VDP(const uint32_t base_address_a = VDP_START): base_address(base_address_a) {}
@@ -80,6 +93,8 @@ class VDP {
                 size_t vcell_count);
         void renderScrollALine(size_t line_index, size_t hcell_count, size_t vcell_count);
         void renderScrollBLine(size_t line_index, size_t hcell_count, size_t vcell_count);
+        void renderSpritesLine(size_t line_index);
+        void renderSpriteOnTheLine(SpriteAttributeEntry, size_t line_index);
         void writeData(uint8_t address_mode, uint16_t address, uint16_t value);
         void writeControl(uint16_t value);
         uint16_t readData(uint8_t address_mode, uint16_t address);
@@ -123,4 +138,5 @@ class VDP {
         uint8_t _cram[kCRAMSize]{};
         uint8_t _vsram[kVSRAMSize]{};
         uint32_t _rendered_buffer[kLinesPerScreenNTSC * kRenderWidth]{};
+        bool _unclosed_sprites_list{};
 };