From: karri Date: Sun, 11 Mar 2012 13:48:40 +0000 (+0000) Subject: Add lynx sprite generation skeleton X-Git-Tag: V2.14~454 X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=cba5d0af56e162991bd4f803049c72ecfaa36e9b;p=cc65 Add lynx sprite generation skeleton git-svn-id: svn://svn.cc65.org/cc65/trunk@5609 b7a2c559-68d2-44c3-8de9-860c34a00d81 --- diff --git a/src/sp65/lynxsprite.c b/src/sp65/lynxsprite.c new file mode 100644 index 000000000..e5cfda46f --- /dev/null +++ b/src/sp65/lynxsprite.c @@ -0,0 +1,167 @@ +/*****************************************************************************/ +/* */ +/* lynxsprite.c */ +/* */ +/* Lynx sprite format backend for the sp65 sprite and bitmap utility */ +/* */ +/* */ +/* */ +/* (C) 2012, Ullrich von Bassewitz */ +/* Roemerstrasse 52 */ +/* D-70794 Filderstadt */ +/* EMail: uz@cc65.org */ +/* */ +/* */ +/* This software is provided 'as-is', without any expressed or implied */ +/* warranty. In no event will the authors be held liable for any damages */ +/* arising from the use of this software. */ +/* */ +/* Permission is granted to anyone to use this software for any purpose, */ +/* including commercial applications, and to alter it and redistribute it */ +/* freely, subject to the following restrictions: */ +/* */ +/* 1. The origin of this software must not be misrepresented; you must not */ +/* claim that you wrote the original software. If you use this software */ +/* in a product, an acknowledgment in the product documentation would be */ +/* appreciated but is not required. */ +/* 2. Altered source versions must be plainly marked as such, and must not */ +/* be misrepresented as being the original software. */ +/* 3. This notice may not be removed or altered from any source */ +/* distribution. */ +/* */ +/*****************************************************************************/ + + + +/* common */ +#include "attrib.h" +#include "print.h" + +/* sp65 */ +#include "attr.h" +#include "error.h" +#include "lynxsprite.h" + + + +/*****************************************************************************/ +/* Data */ +/*****************************************************************************/ + + + +/* Sprite mode */ +enum Mode { + smAuto, + smLiteral, + smPacked +}; + +/* Screen size of a koala picture */ +#define WIDTH_HR 24U +#define WIDTH_MC 12U +#define HEIGHT 21U + + + +/*****************************************************************************/ +/* Code */ +/*****************************************************************************/ + + + +static enum Mode GetMode (const Collection* A) +/* Return the sprite mode from the attribute collection A */ +{ + /* Check for a mode attribute */ + const char* Mode = GetAttrVal (A, "mode"); + if (Mode) { + if (strcmp (Mode, "literal") == 0) { + return smLiteral; + } else if (strcmp (Mode, "packed") == 0) { + return smPacked; + } else { + Error ("Invalid value for attribute `mode'"); + } + } else { + return smAuto; + } +} + + + +StrBuf* GenLynxSprite (const Bitmap* B, const Collection* A) +/* Generate binary output in Lynx sprite format for the bitmap B. The output + * is stored in a string buffer (which is actually a dynamic char array) and + * returned. + */ +{ + enum Mode M; + StrBuf* D; + unsigned X, Y; + + + /* Output the image properties */ + Print (stdout, 1, "Image is %ux%u with %u colors%s\n", + GetBitmapWidth (B), GetBitmapHeight (B), GetBitmapColors (B), + BitmapIsIndexed (B)? " (indexed)" : ""); + + /* Get the sprite mode */ + M = GetMode (A); + + /* Check the height of the bitmap */ + if (GetBitmapHeight (B) != HEIGHT) { + Error ("Invalid bitmap height (%u) for conversion to vic2 sprite", + GetBitmapHeight (B)); + } + + /* If the mode wasn't given, fallback to packed */ + if (M == smAuto) { + M = smPacked; + } + + /* Now check if bitmap indexes are ok */ + if (GetBitmapColors (B) > 16) { + Error ("Too many colors for a Lynx sprite"); + } + + /* Create the output buffer and resize it to the required size. */ + D = NewStrBuf (); + SB_Realloc (D, 63); + + /* Convert the image */ + for (Y = 0; Y < HEIGHT; ++Y) { + unsigned char V = 0; + if (M == smLiteral) { + for (X = 0; X < WIDTH_HR; ++X) { + + /* Fetch next bit into byte buffer */ + V = (V << 1) | (GetPixel (B, X, Y).Index & 0x01); + + /* Store full bytes into the output buffer */ + if ((X & 0x07) == 0x07) { + SB_AppendChar (D, V); + V = 0; + } + } + } else { + for (X = 0; X < WIDTH_MC; ++X) { + + /* Fetch next bit into byte buffer */ + V = (V << 2) | (GetPixel (B, X, Y).Index & 0x03); + + /* Store full bytes into the output buffer */ + if ((X & 0x03) == 0x03) { + SB_AppendChar (D, V); + V = 0; + } + } + } + } + + /* Return the converted bitmap */ + return D; +} + + + diff --git a/src/sp65/lynxsprite.h b/src/sp65/lynxsprite.h new file mode 100644 index 000000000..c5611e036 --- /dev/null +++ b/src/sp65/lynxsprite.h @@ -0,0 +1,69 @@ +/*****************************************************************************/ +/* */ +/* lynxsprite.h */ +/* */ +/* Lynx sprite format backend for the sp65 sprite and bitmap utility */ +/* */ +/* */ +/* */ +/* (C) 2012, Ullrich von Bassewitz */ +/* Roemerstrasse 52 */ +/* D-70794 Filderstadt */ +/* EMail: uz@cc65.org */ +/* */ +/* */ +/* This software is provided 'as-is', without any expressed or implied */ +/* warranty. In no event will the authors be held liable for any damages */ +/* arising from the use of this software. */ +/* */ +/* Permission is granted to anyone to use this software for any purpose, */ +/* including commercial applications, and to alter it and redistribute it */ +/* freely, subject to the following restrictions: */ +/* */ +/* 1. The origin of this software must not be misrepresented; you must not */ +/* claim that you wrote the original software. If you use this software */ +/* in a product, an acknowledgment in the product documentation would be */ +/* appreciated but is not required. */ +/* 2. Altered source versions must be plainly marked as such, and must not */ +/* be misrepresented as being the original software. */ +/* 3. This notice may not be removed or altered from any source */ +/* distribution. */ +/* */ +/*****************************************************************************/ + + + +#ifndef LYNXSPRITE_H +#define LYNXSPRITE_H + + + +/* common */ +#include "coll.h" +#include "strbuf.h" + +/* sp65 */ +#include "bitmap.h" + + + +/*****************************************************************************/ +/* Code */ +/*****************************************************************************/ + + + +StrBuf* GenLynxSprite (const Bitmap* B, const Collection* A); +/* Generate binary output in packed Lynx sprite format for the bitmap B. The output + * is stored in a string buffer (which is actually a dynamic char array) and + * returned. + */ + + + +/* End of lynxsprite.h */ + +#endif + + + diff --git a/src/sp65/make/gcc.mak b/src/sp65/make/gcc.mak index 6a47c36ee..045b792d5 100644 --- a/src/sp65/make/gcc.mak +++ b/src/sp65/make/gcc.mak @@ -33,6 +33,7 @@ OBJS = asm.o \ fileio.o \ input.o \ koala.o \ + lynxsprite.o \ main.o \ output.o \ palette.o \ diff --git a/src/sp65/make/watcom.mak b/src/sp65/make/watcom.mak index c5b242a78..ff3838c20 100644 --- a/src/sp65/make/watcom.mak +++ b/src/sp65/make/watcom.mak @@ -71,6 +71,7 @@ OBJS = asm.obj \ fileio.obj \ input.obj \ koala.obj \ + lynxsprite.obj \ main.obj \ output.obj \ palette.obj \