Expand all graphics retrieval with bitmap and vram

src/app/gfx/pseudo_vram.h

@@ -0,0 +1,47 @@
+#ifndef YAZE_APP_GFX_PSEUDO_VRAM_H
+#define YAZE_APP_GFX_PSEUDO_VRAM_H
+
+#include <SDL2/SDL.h>
+
+#include <cstdint>
+#include <unordered_map>
+#include <vector>
+
+#include "app/gfx/bitmap.h"
+#include "app/gfx/snes_palette.h"
+#include "app/gfx/snes_tile.h"
+
+namespace yaze {
+namespace app {
+namespace gfx {
+
+// VRAM: 64 KB of VRAM for screen maps and tile sets (backgrounds and objects)
+// OAM: 512 + 32 bytes for objects (Object Attribute Memory)
+// CGRAM: 512 bytes for palette data
+// Palette: 256 entries; 15-Bit color (BGR555) for a total of 32,768 colors.
+// Resolution: between 256x224 and 512x448.
+
+class pseudo_vram {
+ public:
+  void ChangeGraphicsTileset(const std::vector<Bitmap>& graphics_set);
+  void ChangeGraphicsPalette(const SNESPalette& graphics_pal);
+  void ChangeSpriteTileset(const std::vector<Bitmap>& sprite_set);
+  void ChangeSpritePalette(const SNESPalette& sprite_pal);
+
+  auto GetTileset(int index) const { return m_vram.at(index); }
+
+ private:
+  std::unordered_map<int, Bitmap> m_vram;
+  static const uint32_t REAL_VRAM_SIZE = 0x8000;
+};
+
+std::vector<Bitmap> CreateGraphicsSet(
+    int id, const std::unordered_map<int, Bitmap>& all_graphics);
+std::vector<Bitmap> CreateSpriteSet(
+    int id, const std::unordered_map<int, Bitmap>& all_graphics);
+
+}  // namespace gfx
+}  // namespace app
+}  // namespace yaze
+
+#endif