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Add lynx sprite generation skeleton

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5609 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
karri 2012-03-11 13:48:40 +00:00
parent 735b2811fc
commit cba5d0af56
4 changed files with 238 additions and 0 deletions
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167
src/sp65/lynxsprite.c Normal file
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@ -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;
}

69
src/sp65/lynxsprite.h Normal file
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@ -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

1
src/sp65/make/gcc.mak
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@ -33,6 +33,7 @@ OBJS = asm.o \
fileio.o \
input.o \
koala.o \
lynxsprite.o \
main.o \
output.o \
palette.o \

1
src/sp65/make/watcom.mak
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@ -71,6 +71,7 @@ OBJS = asm.obj \
fileio.obj \
input.obj \
koala.obj \
lynxsprite.obj \
main.obj \
output.obj \
palette.obj \