DM: Create DisplayMan, add support parsing IMG0 files

Add display manager named DisplayMan with functions: setUpScreens(),
loadGraphics() (which loads graphics from the graphics.dat file),
setPalette(..), loadIntoBitmap(..) which loads the requested image into a
bitmap and blitToScreen(..)

1 files changed, 38 insertions, 0 deletions

diff --git a/engines/dm/gfx.h b/engines/dm/gfx.h
new file mode 100644
index 0000000000..91cf7e1ca2
--- /dev/null
+++ b/engines/dm/gfx.h
@@ -0,0 +1,38 @@
+#ifndef GFX_H
+#define GFX_H
+
+#include "common/scummsys.h"
+#include "dm/dm.h"
+
+namespace DM {
+
+class DisplayMan {
+	DMEngine *_vm;
+	byte *_currPalette;
+	uint16 _screenWidth;
+	uint16 _screenHeight;
+	byte *_vgaBuffer;
+	uint16 _itemCount;
+	uint32 *_indexBytePos;
+	uint8 *_compressedData;
+	DisplayMan(const DMEngine &dmEngine); // no implementation on purpose
+	void operator=(const DisplayMan &rhs); // no implementation on purpose
+public:
+	DisplayMan(DMEngine *dmEngine);
+	~DisplayMan();
+	void setUpScreens(uint16 width, uint16 height);
+	void loadGraphics();
+	void setPalette(byte *buff, uint16 colorCount);
+	void loadIntoBitmap(uint16 index, byte *destBitmap);
+	uint16 getImageWidth(uint16 index);
+	uint16 getImageHeight(uint16 index);
+	void blitToScreen(byte *srcBitmap, uint16 srcWidth, uint16 srcHeight, uint16 destX, uint16 destY);
+	byte *getCurrentVgaBuffer();
+	void updateScreen();
+};
+
+}
+
+
+
+#endif