Mercurial > hg > dmlib
view tools/lib64gfx.c @ 916:3985f596ece5
Cosmetics.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Wed, 25 Feb 2015 03:53:07 +0200 |
parents | ba6b210c9bf4 |
children | df3a74f230d9 |
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/* * Functions for reading and converting various restricted * C64/etc and/or indexed/paletted 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. */ #include "lib64gfx.h" #define BUF_SIZE_INITIAL (16*1024) #define BUF_SIZE_GROW (4*1024) char * dmC64GetImageTypeString(char *buf, const size_t len, const int type) { snprintf(buf, len, "%s%s%s", (type & D64_FMT_FLI) ? "FLI " : "", (type & D64_FMT_MC) ? "MCol" : "HiRes", (type & D64_FMT_ILACE) ? " Ilace" : "" ); return buf; } // Based on Pepto's palette, stolen from VICE DMColor dmC64Palette[C64_NCOLORS] = { { 0x00, 0x00, 0x00, 0xff }, { 0xFF, 0xFF, 0xFF, 0xff }, { 0x68, 0x37, 0x2B, 0xff }, { 0x70, 0xA4, 0xB2, 0xff }, { 0x6F, 0x3D, 0x86, 0xff }, { 0x58, 0x8D, 0x43, 0xff }, { 0x35, 0x28, 0x79, 0xff }, { 0xB8, 0xC7, 0x6F, 0xff }, { 0x6F, 0x4F, 0x25, 0xff }, { 0x43, 0x39, 0x00, 0xff }, { 0x9A, 0x67, 0x59, 0xff }, { 0x44, 0x44, 0x44, 0xff }, { 0x6C, 0x6C, 0x6C, 0xff }, { 0x9A, 0xD2, 0x84, 0xff }, { 0x6C, 0x5E, 0xB5, 0xff }, { 0x95, 0x95, 0x95, 0xff }, }; const size_t dmC64DefaultSizes[DT_LAST] = { C64_SCR_COLOR_SIZE, C64_SCR_BITMAP_SIZE, C64_SCR_SCREEN_SIZE, 1, C64_SCR_EXTRADATA, }; #define DM_GET_ADDR_LO(addr) ((addr) & 0xff) #define DM_GET_ADDR_HI(addr) (((addr) >> 8) & 0xff) static BOOL dmCompareAddr16(const Uint8 *buf, const size_t offs, const Uint16 addr) { return buf[offs ] == DM_GET_ADDR_LO(addr) && buf[offs + 1] == DM_GET_ADDR_HI(addr); } int dmC64ConvertCSDataToImage(DMImage *img, int xoffs, int yoffs, const Uint8 *buf, int width, int height, BOOL multicolor, int *colors) { int yc, widthpx = width * 8; Uint8 *dp; if (img == NULL) return DMERR_NULLPTR; if (xoffs < 0 || yoffs < 0 || xoffs > img->width - widthpx || yoffs > img->height - height) return DMERR_INVALID_ARGS; dp = img->data + (yoffs * img->pitch) + xoffs; if (multicolor) { for (yc = 0; yc < height; yc++) { const int offs = yc * width; int xc; Uint8 *d = dp; for (xc = 0; xc < widthpx / 2; xc++) { const int b = buf[offs + (xc / 4)]; const int v = 6 - ((xc * 2) & 6); const Uint8 c = colors[(b >> v) & 3]; *d++ = c; *d++ = c; } dp += img->pitch; } } else { for (yc = 0; yc < height; yc++) { const int offs = yc * width; int xc; Uint8 *d = dp; for (xc = 0; xc < widthpx; xc++) { const int b = buf[offs + (xc / 8)]; const int v = 7 - (xc & 7); const Uint8 c = colors[(b >> v) & 1]; *d++ = c; } dp += img->pitch; } } return DMERR_OK; } static int fmtProbeDrazPaint20Packed(const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { const char *ident = (const char *) buf + 2; if (len > 22 && dmCompareAddr16(buf, 0, fmt->addr) && strncmp(ident, "DRAZPAINT ", 10) == 0 && ident[11] == '.' && ( (ident[10] == '1' && ident[12] == '4') || (ident[10] == '2' && ident[12] == '0') )) return DM_PROBE_SCORE_MAX; return DM_PROBE_SCORE_FALSE; } static int dmDecodeGenericRLE(Uint8 **mem, Uint8 **pdstEnd, const Uint8 *src, const Uint8 *srcEnd, const Uint8 rleMarker) { Uint8 *dst, *dstEnd; if ((*mem = dmMalloc(C64_RAM_SIZE)) == NULL) return DMERR_MALLOC; dst = *mem; dstEnd = *mem + C64_RAM_SIZE; while (src <= srcEnd && dst <= dstEnd) { int c = *src++; if (c == rleMarker && src + 2 <= srcEnd) { int cnt = *src++; c = *src++; while (cnt-- && dst <= dstEnd) *dst++ = c; } else *dst++ = c; } *pdstEnd = dst; return DMERR_OK; } static int fmtDecodeDrazPaintPacked(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { int res; Uint8 *mem = NULL, *dstEnd; if ((res = dmDecodeGenericRLE(&mem, &dstEnd, buf + 0x0e, buf + len, *(buf + 0x0d))) != DMERR_OK) goto out; res = dmC64DecodeGenericBMP(img, mem, dstEnd - mem + 1, fmt); out: dmFree(mem); return res; } static int fmtProbeDrazLace10Packed(const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { const char *ident = (const char *) buf + 2; if (len > 22 && dmCompareAddr16(buf, 0, fmt->addr) && strncmp(ident, "DRAZLACE! 1.0", 13) == 0) return DM_PROBE_SCORE_MAX; return DM_PROBE_SCORE_FALSE; } static BOOL fmtDrazLaceSetLaceType(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len) { (void) len; img->laceType = buf[op->offs] ? D64_ILACE_RES : D64_ILACE_COLOR; img->laceBank1 = img->laceBank2 = 0; return TRUE; } #define AMICA_DM_PROBE_SIZE 2048 static int fmtProbeAmicaPaintPacked(const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { size_t i, n; if (len < AMICA_DM_PROBE_SIZE || !dmCompareAddr16(buf, 0, fmt->addr)) return DM_PROBE_SCORE_FALSE; // Interpaint Hi-Res gives a false positive if (len == 9002) return DM_PROBE_SCORE_FALSE; for (n = 0, i = 2; i < len; i++) if (buf[i] == 0xC2) n++; if (n > 50) return DM_PROBE_SCORE_GOOD; if (n > 25) return DM_PROBE_SCORE_AVG; if (n > 10) return DM_PROBE_SCORE_MAYBE; return DM_PROBE_SCORE_FALSE; } static int fmtDecodeAmicaPaintPacked(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { int res; Uint8 *mem = NULL, *dstEnd; if ((res = dmDecodeGenericRLE(&mem, &dstEnd, buf, buf + len, 0xC2)) != DMERR_OK) goto out; res = dmC64DecodeGenericBMP(img, mem, dstEnd - mem + 1, fmt); out: dmFree(mem); return res; } static BOOL fmtTruePaintSetLaceType(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len) { (void) op; (void) buf; (void) len; img->laceType = D64_ILACE_RES; img->laceBank1 = 0; img->laceBank2 = 1; return TRUE; } static BOOL fmtSetFLIType(DMC64Image *img, const struct _DMC64EncDecOp *op, const Uint8 *buf, const size_t len) { (void) buf; (void) len; img->fliType = op->bank; return TRUE; } const DMC64ImageFormat dmC64ImageFormats[] = { { D64_FMT_MC, "d2p", "DrazPaint 2.0 (packed)", 0x5800, -1, fmtProbeDrazPaint20Packed, fmtDecodeDrazPaintPacked, NULL, NULL, NULL, 4, { { DT_COLOR_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0800, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0400, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2740, 0, 0, NULL, NULL }, } }, { D64_FMT_MC | D64_FMT_ILACE, "dlp", "DrazLace 1.0 (packed)", 0x5800, -1, fmtProbeDrazLace10Packed, fmtDecodeDrazPaintPacked, NULL, NULL, NULL, 6, { { DT_COLOR_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0800, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0400, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2740, 0, 0, NULL, NULL }, { DT_BITMAP, 0x2800, 1, 0, NULL, NULL }, { DT_DEC_FUNCTION, 0x2742, 0, 1, fmtDrazLaceSetLaceType, NULL }, } }, { D64_FMT_MC, "drp", "DrazPaint (unpacked)", 0x5800, 10051, NULL, NULL, NULL, NULL, NULL, 4, { { DT_COLOR_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0800, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0400, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2740, 0, 0, NULL, NULL }, } }, { D64_FMT_MC | D64_FMT_ILACE, "drl", "DrazLace 1.0 (unpacked)", 0x5800, 18242, NULL, NULL, NULL, NULL, NULL, 6, { { DT_COLOR_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0800, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0400, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2740, 0, 0, NULL, NULL }, { DT_BITMAP, 0x2800, 1, 0, NULL, NULL }, { DT_DEC_FUNCTION, 0x2742, 0, 1, fmtDrazLaceSetLaceType, NULL }, } }, { D64_FMT_MC | D64_FMT_ILACE, "mci", "Truepaint (unpacked)", 0x9c00, 19434, NULL, NULL, NULL, NULL, NULL, 6, { { DT_SCREEN_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x03e8, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0400, 0, 0, NULL, NULL }, { DT_BITMAP, 0x2400, 1, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x4400, 1, 0, NULL, NULL }, { DT_COLOR_RAM, 0x4800, 0, 0, NULL, NULL }, { DT_DEC_FUNCTION, 0x0000, 0, 0, fmtTruePaintSetLaceType, NULL }, } }, { D64_FMT_MC, "kla", "Koala Paint (unpacked)", 0x6000, 10003, NULL, NULL, NULL, NULL, NULL, 4, { { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, { DT_COLOR_RAM, 0x2328, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2710, 0, 0, NULL, NULL }, } }, { D64_FMT_MC, "ocp", "Advanced Art Studio (unpacked)", 0x2000, 10018, NULL, NULL, NULL, NULL, NULL, 4, { { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, { DT_COLOR_RAM, 0x2338, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2329, 0, 0, NULL, NULL }, } }, { D64_FMT_MC, "ami", "Amica Paint (packed)", 0x4000, -1, fmtProbeAmicaPaintPacked, fmtDecodeAmicaPaintPacked, NULL, NULL, NULL, 4, { { DT_COLOR_RAM, 0x2328, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2710, 0, 0, NULL, NULL }, } }, { D64_FMT_MC, "rpm", "Run Paint (unpacked)", 0x6000, 10006, NULL, NULL, NULL, NULL, NULL, 4, { { DT_COLOR_RAM, 0x2328, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, { DT_BGCOLOR, 0x2710, 0, 0, NULL, NULL }, } }, { D64_FMT_HIRES, "art", "Art Studio (unpacked)", 0x2000, 9009, NULL, NULL, NULL, NULL, NULL, 2, { { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, } }, { D64_FMT_HIRES, "iph", "Interpaint (unpacked)", 0x4000, 9002, NULL, NULL, NULL, NULL, NULL, 2, { { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1f40, 0, 0, NULL, NULL }, } }, { D64_FMT_HIRES, "dd", "Doodle (unpacked)", 0x1c00, 9218, NULL, NULL, NULL, NULL, NULL, 2, { { DT_SCREEN_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_BITMAP, 0x0400, 0, 0, NULL, NULL }, } }, { D64_FMT_MC | D64_FMT_FLI, "bml", "Blackmail FLI (unpacked)", 0x3b00, 17474, NULL, NULL, NULL, NULL, NULL, 11, { { DT_COLOR_RAM, 0x0100, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0500, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0900, 1, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0d00, 2, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1100, 3, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1500, 4, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1900, 5, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1d00, 6, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x2100, 7, 0, NULL, NULL }, { DT_BITMAP, 0x2500, 0, 0, NULL, NULL }, { DT_DEC_FUNCTION, 0x0000, D64_FLI_8BANK, 0, fmtSetFLIType, NULL }, } }, { D64_FMT_MC | D64_FMT_FLI, "fli", "FLI Designer (unpacked)", 0x3c00, 17409, NULL, NULL, NULL, NULL, NULL, 11, { { DT_COLOR_RAM, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0400, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0800, 1, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x0c00, 2, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1000, 3, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1400, 4, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1800, 5, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x1c00, 6, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x2000, 7, 0, NULL, NULL }, { DT_BITMAP, 0x2400, 0, 0, NULL, NULL }, { DT_DEC_FUNCTION, 0x0000, D64_FLI_8BANK, 0, fmtSetFLIType, NULL }, } }, { D64_FMT_MC, "xx1", "Unknown $2000 format (unpacked)", 0x2000, 10242, NULL, NULL, NULL, NULL, NULL, 4, { { DT_BITMAP, 0x0000, 0, 0, NULL, NULL }, { DT_SCREEN_RAM, 0x2000, 0, 0, NULL, NULL }, { DT_COLOR_RAM, 0x2400, 0, 0, NULL, NULL }, { DT_BGCOLOR_SET, 0x00 , 0, 0, NULL, NULL }, } }, }; const int ndmC64ImageFormats = sizeof(dmC64ImageFormats) / sizeof(dmC64ImageFormats[0]); // Perform probing of the given data buffer, trying to determine // if it contains a supported "C64" image format. Returns the // "probe score", see libgfx.h for list of values. If a match // is found, pointer to format description is set to *pfmt. int dmC64ProbeBMP(const Uint8 *buf, const size_t len, const DMC64ImageFormat **pfmt) { int i, scoreMax = DM_PROBE_SCORE_FALSE, scoreIndex = -1; for (i = 0; i < ndmC64ImageFormats; i++) { const DMC64ImageFormat *fmt = &dmC64ImageFormats[i]; int score = DM_PROBE_SCORE_FALSE; if (fmt->probe == NULL && fmt->size > 0 && fmt->addr > 0) { // Generic probe just checks matching size and load address if (len == fmt->size && dmCompareAddr16(buf, 0, fmt->addr)) score = DM_PROBE_SCORE_GOOD; } else score = fmt->probe(buf, len, fmt); if (score > scoreMax) { scoreMax = score; scoreIndex = i; } } if (scoreIndex >= 0) { *pfmt = &dmC64ImageFormats[scoreIndex]; return scoreMax; } else return DM_PROBE_SCORE_FALSE; } static int dmC64SanityCheckEncDecOp(const int i, const DMC64EncDecOp *op) { if (op->bank < 0 || op->bank >= C64_SCR_MAX_BANK) { dmError("Invalid bank %d definition in generic encode/decode operator %d @ #%d.\n", op->bank, op->type, i); return DMERR_INTERNAL; } if (op->type < 0 || op->type >= DT_LAST) { dmError("Invalid encode/decode operator type %d @ #%d.\n", op->type, i); return DMERR_INTERNAL; } return DMERR_OK; } int dmC64DecodeGenericBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt) { int i; if (buf == NULL || img == NULL || fmt == NULL) return DMERR_NULLPTR; // Clear the image structure memset(img, 0, sizeof(*img)); img->type = fmt->type; // Perform decoding for (i = 0; i < fmt->nencdecOps; i++) { const DMC64EncDecOp *op = &fmt->encdecOps[i]; const Uint8 *src; size_t size; int res; // Check operation validity if ((res = dmC64SanityCheckEncDecOp(i, op)) != DMERR_OK) return res; // Check size size = (op->size == 0) ? dmC64DefaultSizes[op->type] : op->size; // Do we need to reallocate some more space? if (op->offs + size > len) { dmError("Decode out of bounds, op #%d type=%d, offs=%d ($%04x), " "bank=%d, size=%d ($%04x) @ %d ($%04x)\n", i, op->type, op->offs, op->offs, op->bank, size, size, len, len); return DMERR_INVALID_DATA; } src = buf + op->offs; // Perform operation switch (op->type) { case DT_COLOR_RAM: memcpy(img->color[op->bank], src, size); break; case DT_BITMAP: memcpy(img->bitmap[op->bank], src, size); break; case DT_SCREEN_RAM: memcpy(img->screen[op->bank], src, size); break; case DT_BGCOLOR: img->bgcolor = *src; break; case DT_BGCOLOR_SET: img->bgcolor = op->offs; break; case DT_EXTRADATA: memcpy(img->extradata, src, size); break; case DT_DEC_FUNCTION: if (op->decfunction == NULL) { dmError("Decode op is a function, but function ptr is NULL: " "op #%d, offs=%d ($%04x), bank=%d, size=%d ($%04x) @ %d ($%04x)\n", i, op->offs, op->offs, op->bank, size, size, len, len); return DMERR_INTERNAL; } if (!op->decfunction(img, op, buf, len)) { dmError("Decode op custom function failed: op #%d, " "offs=%d ($%04x), bank=%d, size=%d ($%04x) @ %d ($%04x)\n", i, op->offs, op->offs, op->bank, size, size, len, len); return DMERR_INTERNAL; } break; } } return DMERR_OK; } int dmC64EncodeGenericBMP(Uint8 **pbuf, size_t *plen, const DMC64Image *img, const DMC64ImageFormat *fmt) { int i, res = DMERR_OK; Uint8 *buf; size_t allocated; if (pbuf == NULL || plen == NULL || img == NULL || fmt == NULL) return DMERR_NULLPTR; // Allocate the output buffer *plen = 0; if (fmt->size > 0) *plen = allocated = fmt->size; else allocated = 8 * 1024; if ((buf = dmMalloc(allocated)) == NULL) { dmError("Could not allocate %d bytes of memory for C64 image encoding buffer.\n", allocated); res = DMERR_MALLOC; goto error; } // Perform encoding for (i = 0; i < fmt->nencdecOps; i++) { const DMC64EncDecOp *op = &fmt->encdecOps[i]; Uint8 *dst = 2 + buf + op->offs; size_t size; // Check operation validity if ((res = dmC64SanityCheckEncDecOp(i, op)) != DMERR_OK) goto error; // Check size size = (op->size == 0) ? dmC64DefaultSizes[op->type] : op->size; // Do we need to reallocate some more space? if (2 + op->offs + size > allocated) { size_t diff = allocated - (op->offs + size + 2), grow = (diff / (BUF_SIZE_GROW - 1)) * BUF_SIZE_GROW; allocated += grow; if ((buf = dmRealloc(buf, allocated)) == NULL) { dmError("Could not re-allocate %d bytes of memory for C64 image encoding buffer.\n", allocated); res = DMERR_MALLOC; goto error; } } if (fmt->size == 0 && op->offs + size + 2 > *plen) *plen = op->offs + size + 2; // Perform operation switch (op->type) { case DT_COLOR_RAM: memcpy(dst, img->color[op->bank], size); break; case DT_BITMAP: memcpy(dst, img->bitmap[op->bank], size); break; case DT_SCREEN_RAM: memcpy(dst, img->screen[op->bank], size); break; case DT_BGCOLOR: *dst = img->bgcolor; break; case DT_EXTRADATA: memcpy(dst, img->extradata, size); break; case DT_ENC_FUNCTION: if (op->encfunction == NULL) { dmError("Encode op is a function, but function ptr is NULL: " "op #%d, offs=%d ($%04x), bank=%d, size=%d ($%04x) @ %d ($%04x)\n", i, op->offs, op->offs, op->bank, size, size, *plen, *plen); return DMERR_INTERNAL; } /* if (!op->encfunction(op, buf, len)) { dmError("Encode op custom function failed: op #%d, " "offs=%d ($%04x), bank=%d, size=%d ($%04x) @ %d ($%04x)\n", i, op->offs, op->offs, op->bank, size, size, len, len); return DMERR_INTERNAL; } */ break; } } buf[0] = DM_GET_ADDR_LO(fmt->addr); buf[1] = DM_GET_ADDR_HI(fmt->addr); *pbuf = buf; return DMERR_OK; error: dmFree(buf); *pbuf = NULL; *plen = 0; return res; } static inline Uint8 dmC64GetMCColor(const DMC64Image *img, const int bits, const int cbank, const int vbank, const int scroffs) { switch (bits) { case 0: return img->bgcolor; break; case 1: return img->screen[vbank][scroffs] >> 4; break; case 2: return img->screen[vbank][scroffs] & 15; break; default: return img->color[cbank][scroffs] & 15; break; } } // Convert a generic "C64" format bitmap in DMC64Image struct to // a indexed/paletted bitmap image. int dmC64ConvertGenericBMP2Image(DMImage *dst, const DMC64Image *src, const BOOL doubleMC) { Uint8 *dp = dst->data; int yc; // Sanity check arguments if (dst == NULL || src == NULL) return DMERR_NULLPTR; if (dst->width < 8) return DMERR_INVALID_ARGS; // Perform generic conversion for (yc = 0; yc < dst->height; yc++) { Uint8 *d = dp; const int y = yc / 8, yb = yc & 7; const int scroffsy = y * C64_SCR_CH_WIDTH; const int bmoffsy = y * C64_SCR_WIDTH; int xc; if ((src->type & D64_FMT_MC) == D64_FMT_HIRES) { // Hi-res bitmap for (xc = 0; xc < dst->width; xc++) { const int x = xc / 8; const int scroffs = scroffsy + x; const int bmoffs = bmoffsy + (x * 8) + yb; const int v = 7 - (xc & 7); if ((src->bitmap[0][bmoffs] >> v) & 1) *d++ = src->screen[0][scroffs] >> 4; else *d++ = src->screen[0][scroffs] & 15; } } else { // Multicolor variants const int wdivisor = doubleMC ? 2 : 1; for (xc = 0; xc < dst->width / wdivisor; xc++) { const int x = xc / 4; const int scroffs = scroffsy + x; const int bmoffs = bmoffsy + (x * 8) + yb; const int v = 6 - ((xc * 2) & 6); Uint8 c; if (src->type & D64_FMT_FLI) { int vbank = 0; switch (src->fliType) { case D64_FLI_2BANK: vbank = yb / 4; break; case D64_FLI_4BANK: vbank = yb / 2; break; case D64_FLI_8BANK: vbank = yb; break; } c = dmC64GetMCColor(src, (src->bitmap[0][bmoffs] >> v) & 3, 0, vbank, scroffs); *d++ = c; if (doubleMC) *d++ = c; } else if (src->type & D64_FMT_ILACE) { *d++ = dmC64GetMCColor(src, (src->bitmap[0][bmoffs] >> v) & 3, 0, src->laceBank1, scroffs); if (doubleMC) *d++ = dmC64GetMCColor(src, (src->bitmap[1][bmoffs] >> v) & 3, 0, src->laceBank2, scroffs); } else { c = dmC64GetMCColor(src, (src->bitmap[0][bmoffs] >> v) & 3, 0, 0, scroffs); *d++ = c; if (doubleMC) *d++ = c; } } } dp += dst->pitch; } return DMERR_OK; } int dmC64ConvertBMP2Image(DMImage **pdst, const DMC64Image *src, const DMC64ImageFormat *fmt, const BOOL doubleMC) { int width, res; DMImage *dst; if (pdst == NULL || src == NULL) return DMERR_NULLPTR; // Calculate output image width if ((src->type & D64_FMT_MC) && !doubleMC) width = C64_SCR_WIDTH / 2; else width = C64_SCR_WIDTH; // Allocate image structure if ((*pdst = dst = dmImageAlloc(width, C64_SCR_HEIGHT)) == NULL) return DMERR_MALLOC; // Set palette dst->pal = (DMColor *) &dmC64Palette; dst->ncolors = C64_NCOLORS; dst->constpal = TRUE; // Convert if (fmt->convertFrom != NULL) res = fmt->convertFrom(dst, src, doubleMC); else res = dmC64ConvertGenericBMP2Image(dst, src, doubleMC); return res; } int dmC64DecodeBMP(DMC64Image *img, const Uint8 *buf, const size_t len, const size_t probeOffs, const size_t loadOffs, const DMC64ImageFormat **fmt, const DMC64ImageFormat *forced) { // Check for forced format if (forced != NULL) *fmt = forced; else { // Nope, perform a generic probe if (probeOffs >= len) return -200; if (dmC64ProbeBMP(buf + probeOffs, len - probeOffs, fmt) == DM_PROBE_SCORE_FALSE) return -201; } if (loadOffs >= len) return -203; // Decode the bitmap to memory layout if ((*fmt)->decode != NULL) return (*fmt)->decode(img, buf + loadOffs, len - loadOffs, *fmt); else return dmC64DecodeGenericBMP(img, buf + loadOffs, len - loadOffs, *fmt); }