--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib64gfx.h	Sat Nov 03 02:19:51 2012 +0200
@@ -0,0 +1,184 @@
+/*
+ * Functions for reading and manipulating some C64/etc graphics formats
+ * Programmed and designed by Matti 'ccr' Hamalainen
+ * (C) Copyright 2012 Tecnic Software productions (TNSP)
+ *
+ * Please read file 'COPYING' for information on license and distribution.
+ */
+#ifndef LIB64GFX_H
+#define LIB64GFX_H 1
+
+#include "dmlib.h"
+
+// Bitmap constants
+#define C64_SCR_WIDTH          320
+#define C64_SCR_HEIGHT         200
+#define C64_SCR_CH_WIDTH       (C64_SCR_WIDTH/8)
+#define C64_SCR_CH_HEIGHT      (C64_SCR_HEIGHT/8)
+#define C64_SCR_COLOR_SIZE     (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
+#define C64_SCR_SCREEN_SIZE    (C64_SCR_CH_WIDTH * C64_SCR_CH_HEIGHT)
+#define C64_SCR_BITMAP_SIZE    (C64_SCR_WIDTH * C64_SCR_HEIGHT/8)
+#define C64_SCR_EXTRADATA      1024
+#define C64_SCR_MAX_BANK       8
+
+// C64 video screen pixel aspect ratio on PAL
+#define C64_SCR_PAR_XY         (0.9365f)
+
+// Sprite constants
+#define C64_SPR_WIDTH          3 // bytes
+#define C64_SPR_HEIGHT         21 // lines
+#define C64_SPR_WIDTH_PX       (8 * C64_SPR_WIDTH)
+#define C64_SPR_SIZE           ((C64_SPR_WIDTH * C64_SPR_HEIGHT) + 1)
+
+// Character constants
+#define C64_CHR_WIDTH          1 // bytes
+#define C64_CHR_HEIGHT         8 // lines
+#define C64_CHR_WIDTH_PX       (8 * C64_CHR_WIDTH)
+#define C64_CHR_SIZE           (C64_CHR_WIDTH * C64_CHR_HEIGHT)
+
+// Etc.
+#define C64_RAM_SIZE           (64*1024)
+#define C64_NCOLORS            16
+#define C64_MAX_COLORS         16
+#define C64_VIDBANK_SIZE       (16*1024)
+#define C64_MAX_SPRITES        (C64_VIDBANK_SIZE / C64_SPR_SIZE)
+#define C64_MAX_CHARS          256
+
+// Probe scores
+#define DM_PROBE_SCORE_MAX     1000
+#define DM_PROBE_SCORE_GOOD    750
+#define DM_PROBE_SCORE_AVG     500
+#define DM_PROBE_SCORE_MAYBE   250
+#define DM_PROBE_SCORE_FALSE   0
+
+enum
+{
+    DM_IFMT_PALETTE,
+    DM_IFMT_RGB,
+    DM_IFMT_RGBA,
+    DM_IFMT_RGB_PLANE,
+};
+
+
+// RGBx color struct
+typedef struct
+{
+    uint8_t r, g, b, x;
+} DMColor;
+
+
+// Bitmapped image struct (can be one of types specified by DM_IFMT_*)
+typedef struct
+{
+    int width, height, pitch;
+    BOOL constpal;
+    int ncolors, ctrans;
+    DMColor *pal;
+    uint8_t *data;
+} DMImage;
+
+
+// Different supported C64 bitmap "modes"
+enum
+{
+    DM_C64IFMT_HIRES,
+    DM_C64IFMT_MC,
+    DM_C64IFMT_HIRES_ILACE,
+    DM_C64IFMT_MC_ILACE,
+    DM_C64IFMT_HIRES_FLI,
+    DM_C64IFMT_MC_FLI,
+
+    DM_C64IFMT_LAST_TYPE
+};
+
+
+enum
+{
+    DM_C64ILACE_COLOR,
+    DM_C64ILACE_RES,
+};
+
+typedef struct
+{
+    BOOL multicolor, xexpand, yexpand;
+    int color, xc, yc;
+    uint8_t data[C64_SPR_HEIGHT][C64_SPR_WIDTH];
+} DMC64Sprite;
+
+
+typedef struct
+{
+    int type,     // Image type (DM_C64IFMT_*)
+        laceType, // Interlace type (DM_C64ILACE_*)
+        fliType,  // FLI type (if FLI used)
+        fliLines, // FLI on every # line
+        laceBank2;
+
+    uint8_t color[C64_SCR_MAX_BANK][C64_SCR_COLOR_SIZE],
+            bitmap[C64_SCR_MAX_BANK][C64_SCR_BITMAP_SIZE],
+            screen[C64_SCR_MAX_BANK][C64_SCR_SCREEN_SIZE],
+            extradata[C64_SCR_EXTRADATA],
+            d020, bgcolor, d022, d023, d024;
+
+    uint8_t charset[C64_MAX_CHARS][C64_CHR_HEIGHT * C64_CHR_WIDTH];
+    DMC64Sprite sprites[C64_MAX_SPRITES];
+} DMC64Image;
+
+
+enum
+{
+    DT_COLOR_RAM,
+    DT_BITMAP,
+    DT_SCREEN_RAM,
+    DT_BGCOLOR,
+    DT_EXTRADATA,
+    
+    DT_FUNCTION,
+    
+    DT_LAST,
+};
+
+
+typedef struct _DMDecodeOp
+{
+    int    type;
+    size_t offs;
+    int    bank;
+    size_t size;
+    BOOL   (*function)(DMC64Image *img, const struct _DMDecodeOp *op, const uint8_t *buf, const size_t len);
+} DMDecodeOp;
+
+
+typedef struct _DMC64ImageFormat
+{
+    int  type;
+    char *extension;
+    char *name;
+    int  (*probe)(const uint8_t *buf, const size_t len);
+    int  (*decode)(DMC64Image *img, const uint8_t *buf, const size_t len, const struct _DMC64ImageFormat *fmt);
+    int  (*convert)(DMImage *, DMC64Image *);
+
+    int ndecodeOps;
+    DMDecodeOp decodeOps[16];
+} DMC64ImageFormat;
+
+
+extern const size_t      dmC64DefaultSizes[DT_LAST];
+extern DMColor           dmC64Palette[C64_NCOLORS];
+extern DMC64ImageFormat  dmC64ImageFormats[];
+extern const int         ndmC64ImageFormats;
+extern const char *      dmC64ImageTypeNames[];
+
+
+DMImage * dmImageAlloc(int width, int height);
+void      dmImageFree(DMImage *img);
+int       dmImageGetBytesPerPixel(int format);
+
+
+int       dmC64ConvertCSData(DMImage *img, int xoffs, int yoffs, const uint8_t *inBuf, int width, int height, BOOL multicolor, int *colors);
+int       dmC64ProbeGeneric(const uint8_t *buf, const size_t len, DMC64ImageFormat **fmt);
+int       dmC64DecodeGenericBMP(DMC64Image *img, const uint8_t *buf, const size_t len, const DMC64ImageFormat *fmt);
+int       dmC64ConvertGenericBMP2Image(DMImage *screen, const DMC64Image *img);
+int       dmReadDataFile(const char *filename, uint8_t **buf, size_t *size);
+
+#endif // LIB64GFX_H