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unpack zips in src to better compression

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zwangseinweisung
2022-10-20 13:28:49 +02:00
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sources/z-tools/trunk/zview/plugins/tga/Makefile Normal file
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STACKSIZE = 64k
OPTIMISATION = -O2 -fomit-frame-pointer -finline-functions
CPU = -m68020-60
LIB = -lldgserver
CFLAGS = $(CPU) $(OPTIMISATION) -Wall -I../common
LDFLAGS = -nostdlib
OBJ = $(LDG_STARTUP_OBJ) tgaldg.o
PROGRAM = tga.ldg
include ../../../common.mak

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sources/z-tools/trunk/zview/plugins/tga/copyright Normal file
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sources/z-tools/trunk/zview/plugins/tga/libtarga.h Normal file
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#ifndef _libtarga_h_
#define _libtarga_h_
#define TGA_IMG_NODATA (0)
#define TGA_IMG_UNC_PALETTED (1)
#define TGA_IMG_UNC_TRUECOLOR (2)
#define TGA_IMG_UNC_GRAYSCALE (3)
#define TGA_IMG_RLE_PALETTED (9)
#define TGA_IMG_RLE_TRUECOLOR (10)
#define TGA_IMG_RLE_GRAYSCALE (11)
#define TGA_LOWER_LEFT (0)
#define TGA_LOWER_RIGHT (1)
#define TGA_UPPER_LEFT (2)
#define TGA_UPPER_RIGHT (3)
#define HDR_LENGTH (18)
#define HDR_IDLEN (0)
#define HDR_CMAP_TYPE (1)
#define HDR_IMAGE_TYPE (2)
#define HDR_CMAP_FIRST (3)
#define HDR_CMAP_LENGTH (5)
#define HDR_CMAP_ENTRY_SIZE (7)
#define HDR_IMG_SPEC_XORIGIN (8)
#define HDR_IMG_SPEC_YORIGIN (10)
#define HDR_IMG_SPEC_WIDTH (12)
#define HDR_IMG_SPEC_HEIGHT (14)
#define HDR_IMG_SPEC_PIX_DEPTH (16)
#define HDR_IMG_SPEC_IMG_DESC (17)
typedef struct
{
uint8 idlen; /* length of the image_id string below. */
uint8 cmap_type; /* paletted image <=> cmap_type */
uint8 image_type; /* can be any of the IMG_TYPE constants above. */
uint16 cmap_first;
uint16 cmap_length; /* how long the colormap is */
uint8 cmap_entry_size; /* how big a palette entry is. */
uint16 img_spec_xorig; /* the x origin of the image in the image data.*/
uint16 img_spec_yorig; /* the y origin of the image in the image data.*/
uint16 img_spec_width; /* the width of the image. */
uint16 img_spec_height; /* the height of the image. */
uint8 img_spec_pix_depth; /* the depth of a pixel in the image. */
uint8 img_spec_img_desc; /* the image descriptor. */
} targa_hdr;
#define TGA_TRUECOLOR_32 (4)
#define TGA_TRUECOLOR_24 (3)
typedef struct
{
int16 handle;
uint8 *img_buf; /* buffer for 1 line of packet TGA Data */
uint8 alphabits;
uint8 bytes_per_pix;
uint8 orientation;
int32 line_size;
int32 img_buf_len; /* L<>nge des IMG-Buffers */
int32 img_buf_offset; /* Abstand zum Anfang des IMG-Buffers */
int32 img_buf_used; /* Anzahl der benutzten Bytes des IMG-Buffers */
int32 rest_length; /* noch einzulesende Dateil<69>nge */
targa_hdr tga;
} tga_pic;
#endif /* _libtarga_h_ */

526
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#include "zview.h"
#include "libtarga.h"
#define alpha_composite( composite, fg, alpha) { \
uint16 temp = (( uint16)( fg) * ( uint16)( alpha) + ( uint16)128); \
( composite) = ( uint8)(( temp + ( temp >> 8)) >> 8); \
}
static uint8 *unpack_line1( tga_pic *tga_struct, uint8 *src, uint8 *dst, uint16 line_width);
static int16 fill_img_buf( tga_pic *tga_struct, int32 read);
static int16 unpack_line( tga_pic *tga_struct, uint8 *dst);
boolean CDECL reader_init( const char *name, IMGINFO info);
boolean CDECL reader_read( IMGINFO info, uint8 *buffer);
void CDECL reader_get_txt( IMGINFO info, txt_data *txtdata);
void CDECL reader_quit( IMGINFO info);
void CDECL init( void);
PROC TGAFunc[] =
{
{ "plugin_init", "", init},
{ "reader_init", "", reader_init},
{ "reader_get_txt", "", reader_get_txt},
{ "reader_read", "", reader_read},
{ "reader_quit", "", reader_quit}
};
LDGLIB tga_plugin =
{
0x0200, /* Plugin version */
5, /* Number of plugin's functions */
TGAFunc, /* List of functions */
"TGA", /* File's type Handled */
LDG_NOT_SHARED, /* The flags NOT_SHARED is used here.. even if zview plugins are reentrant
and are shareable, we must use this flags because we don't know if the
user has ldg.prg deamon installed on his computer */
NULL, /* Function called when the plugin is unloaded */
1L /* Howmany file type are supported by this plugin */
};
/*==================================================================================*
* void tga_write_pixel_to_mem: *
* Write the pixel to the data regarding how the header says the data *
* is ordered. *
*----------------------------------------------------------------------------------*
* input: *
* dst -> the pixel is wrote here. *
* orientation -> the pixel orientation ( from TGA header). *
* pixel_position -> the pixel position in the x axis. *
* width -> the image's width. *
* pixel -> the 24 bits pixel to write. *
*----------------------------------------------------------------------------------*
* return: *
* -- *
*==================================================================================*/
static inline void tga_write_pixel_to_mem( uint8 *dst, uint8 orientation, uint16 pixel_position, uint16 width, uint8 *rgb)
{
register uint16 x, addy;
switch( orientation)
{
case TGA_UPPER_LEFT:
case TGA_LOWER_LEFT:
default:
x = pixel_position % width;
break;
case TGA_LOWER_RIGHT:
case TGA_UPPER_RIGHT:
x = width - 1 - ( pixel_position % width);
break;
}
addy = x * 3;
dst[addy++] = rgb[0];
dst[addy++] = rgb[1];
dst[addy] = rgb[2];
}
/*==================================================================================*
* uint32 tga_convert_color: *
* Write the pixel to the data regarding how the header says the data *
* is ordered. *
*----------------------------------------------------------------------------------*
* input: *
* rgb -> bgra value. *
* bpp_in -> original image bitplanes. *
* alphabits -> Alpha bit... 1 if present else 0. *
*----------------------------------------------------------------------------------*
* return: *
* the converted pixel. *
*==================================================================================*/
static inline void tga_convert_color( uint8 *bgra, uint8 *rgb, uint8 bpp_in, uint8 alphabits)
{
uint8 r = 0, g = 0, b = 0, a = 0;
switch( bpp_in)
{
case 32:
case 24:
if( alphabits)
{
/* not premultiplied alpha -- multiply. */
a = bgra[3];
alpha_composite( r, bgra[2], a);
alpha_composite( g, bgra[1], a);
alpha_composite( b, bgra[0], a);
}
else
{
r = bgra[2];
g = bgra[1];
b = bgra[0];
}
break;
case 16:
case 15:
{
/* 16-bit to 32-bit; (force alpha to full) */
register uint16 src16 = (( ( uint16)bgra[1] << 8) | bgra[0]);
b = (( src16) & 0x001F) << 3;
g = (( src16 >> 5) & 0x001F) << 3;
r = (( src16 >> 10) & 0x001F) << 3;
break;
}
}
rgb[0] = r;
rgb[1] = g;
rgb[2] = b;
}
/*==================================================================================*
* boolean CDECL reader_init: *
* Open the file "name", fit the "info" struct. ( see zview.h) and make others *
* things needed by the decoder. *
*----------------------------------------------------------------------------------*
* input: *
* name -> The file to open. *
* info -> The IMGINFO struct. to fit. *
*----------------------------------------------------------------------------------*
* return: *
* TRUE if all ok else FALSE. *
*==================================================================================*/
boolean CDECL reader_init( const char *name, IMGINFO info)
{
uint32 num_pixels, file_length;
int16 handle, format = TGA_TRUECOLOR_24;
uint8 header_buf[HDR_LENGTH];
tga_pic *tga_struct;
if ( ( handle = ( int16)Fopen( name, 0)) < 0)
return FALSE;
if( Fread( handle, HDR_LENGTH, &header_buf) != HDR_LENGTH)
{
Fclose( handle);
return FALSE;
}
tga_struct = ( tga_pic*)malloc( sizeof( tga_pic));
if( tga_struct == NULL)
{
Fclose( handle);
return FALSE;
}
/* byte order is important here. */
tga_struct->tga.idlen = header_buf[0];
tga_struct->tga.cmap_type = header_buf[1];
tga_struct->tga.image_type = header_buf[2];
tga_struct->tga.cmap_first = (uint16)header_buf[3] + ((uint16)header_buf[4] << 8);
tga_struct->tga.cmap_length = (uint16)header_buf[5] + ((uint16)header_buf[6] << 8);
tga_struct->tga.cmap_entry_size = header_buf[7];
tga_struct->tga.img_spec_xorig = (uint16)header_buf[8] + ((uint16)header_buf[9] << 8);
tga_struct->tga.img_spec_yorig = (uint16)header_buf[10] + ((uint16)header_buf[11] << 8);
tga_struct->tga.img_spec_width = (uint16)header_buf[12] + ((uint16)header_buf[13] << 8);
tga_struct->tga.img_spec_height = (uint16)header_buf[14] + ((uint16)header_buf[15] << 8);
tga_struct->tga.img_spec_pix_depth = header_buf[16];
tga_struct->tga.img_spec_img_desc = header_buf[17];
num_pixels = tga_struct->tga.img_spec_width * tga_struct->tga.img_spec_height;
if( num_pixels == 0)
{
free( ( void*)tga_struct);
Fclose( handle);
return FALSE;
}
file_length = Fseek( 0L, handle, 2);
tga_struct->alphabits = tga_struct->tga.img_spec_img_desc & 0x0F;
tga_struct->handle = handle;
/* seek past the image id, if there is one */
if( Fseek( tga_struct->tga.idlen + HDR_LENGTH, handle, 0) < 0 )
{
free( ( void*)tga_struct);
Fclose( handle);
return FALSE;
}
/* if the image type is not supported, just jump out. */
if( tga_struct->tga.image_type != TGA_IMG_UNC_TRUECOLOR && tga_struct->tga.image_type != TGA_IMG_RLE_TRUECOLOR)
{
free( ( void*)tga_struct);
Fclose( handle);
return FALSE;
}
/* compute number of bytes in an image data unit (either index or BGR triple) */
if( tga_struct->tga.img_spec_pix_depth & 0x07 )
tga_struct->bytes_per_pix = ((( 8 - ( tga_struct->tga.img_spec_pix_depth & 0x07)) + tga_struct->tga.img_spec_pix_depth) >> 3);
else
tga_struct->bytes_per_pix = ( tga_struct->tga.img_spec_pix_depth >> 3);
/* assume that there's one byte per pixel */
if( tga_struct->bytes_per_pix == 0 )
tga_struct->bytes_per_pix = 1;
tga_struct->line_size = tga_struct->tga.img_spec_width * tga_struct->bytes_per_pix;
tga_struct->img_buf_len = tga_struct->line_size << 1;
tga_struct->img_buf = ( uint8 *)malloc( tga_struct->img_buf_len + 256L);
if( tga_struct->img_buf == NULL)
{
free( ( void*)tga_struct);
Fclose( handle);
return FALSE;
}
tga_struct->orientation = ( tga_struct->tga.img_spec_img_desc & 0x30) >> 4;
tga_struct->rest_length = file_length - ( tga_struct->tga.idlen + HDR_LENGTH);
if ( tga_struct->img_buf_len > tga_struct->rest_length)
tga_struct->img_buf_len = tga_struct->rest_length;
tga_struct->img_buf_offset = 0;
tga_struct->img_buf_used = Fread( handle, tga_struct->img_buf_len, tga_struct->img_buf);
tga_struct->rest_length -= tga_struct->img_buf_used;
info->width = tga_struct->tga.img_spec_width;
info->height = tga_struct->tga.img_spec_height;
info->real_width = info->width;
info->real_height = info->height;
info->memory_alloc = TT_RAM;
info->components = format;
info->planes = tga_struct->tga.img_spec_pix_depth;
info->colors = 1L << ( uint32)info->planes;
info->page = 1;
info->delay = 0;
info->num_comments = 0;
info->max_comments_length = 0;
info->indexed_color = FALSE;
info->_priv_ptr = ( void *)tga_struct;
if( tga_struct->orientation == TGA_UPPER_LEFT || tga_struct->orientation == TGA_UPPER_RIGHT)
{
info->orientation = UP_TO_DOWN;
}
else
{
info->orientation = DOWN_TO_UP;
}
strcpy( info->info, "Truevision Graphics Adapter");
if( tga_struct->tga.image_type == TGA_IMG_UNC_TRUECOLOR)
{
strcpy( info->compression, "None");
}
else
{
strcpy( info->compression, "RLE");
}
return TRUE;
}
/*==================================================================================*
* int16 fill_img_buf: *
* fill the buffer "tga_struct->img_buf" with a line from file. *
* the buffer can contain 2 lines, this function search also where write the *
* new line from the file. *
*----------------------------------------------------------------------------------*
* input: *
* tga_struct -> tga_pic struct. with all the wanted information. *
* read -> internal counter. *
*----------------------------------------------------------------------------------*
* return: *
* Always 1 ( need to code something more secure) *
*==================================================================================*/
static int16 fill_img_buf( tga_pic *tga_struct, int32 read)
{
tga_struct->img_buf_used -= read;
tga_struct->img_buf_offset += read;
if ( tga_struct->img_buf_offset >= ( tga_struct->img_buf_len >> 1))
{
if ( tga_struct->img_buf_used > 0)
memcpy( tga_struct->img_buf, tga_struct->img_buf + tga_struct->img_buf_offset, tga_struct->img_buf_used);
read = tga_struct->img_buf_offset;
if ( read > tga_struct->rest_length )
read = tga_struct->rest_length;
read = Fread( tga_struct->handle, read, tga_struct->img_buf + tga_struct->img_buf_used);
tga_struct->img_buf_used += read;
tga_struct->img_buf_offset = 0;
tga_struct->rest_length -= read;
}
return( 1);
}
/*==================================================================================*
* uint8 *unpack_line1: *
* depack ( for RLE image) and copy data from source to destination. *
*----------------------------------------------------------------------------------*
* input: *
* tga_struct -> tga_pic struct. with all the wanted information. *
* src -> the source buffer. *
* dst -> the destination buffer. *
* line_width -> the image width. *
*----------------------------------------------------------------------------------*
* return: *
* Howmany source buffer position after that the job is done. *
*==================================================================================*/
static uint8 *unpack_line1( tga_pic *tga_struct, uint8 *src, uint8 *dst, uint16 line_width)
{
register uint16 i, j, bytes_per_pix = ( int16)tga_struct->bytes_per_pix;
uint8 bgra[4], rgb[3], packet_header, repcount;
if( tga_struct->tga.image_type == TGA_IMG_UNC_TRUECOLOR)
{
for ( i = 0; i < line_width; i++)
{
for ( j = 0; j < bytes_per_pix; j++)
bgra[j] = *src++;
tga_convert_color( &bgra[0], &rgb[0], tga_struct->tga.img_spec_pix_depth, tga_struct->alphabits);
tga_write_pixel_to_mem( dst, tga_struct->orientation, i, line_width, &rgb[0]);
}
}
else
{
register uint16 l;
for( i = 0; i < line_width; )
{
packet_header = *src++;
if( packet_header & 0x80 )
{
for ( j = 0; j < bytes_per_pix; j++)
bgra[j] = *src++;
tga_convert_color( &bgra[0], &rgb[0], tga_struct->tga.img_spec_pix_depth, tga_struct->alphabits);
repcount = (packet_header & 0x7F) + 1;
/* write all the data out */
for( j = 0; j < repcount; j++ )
tga_write_pixel_to_mem( dst, tga_struct->orientation, i + j, line_width, &rgb[0]);
i += repcount;
}
else
{
repcount = ( packet_header & 0x7F) + 1;
for( l = 0; l < repcount; l++)
{
for ( j = 0; j < bytes_per_pix; j++)
bgra[j] = *src++;
tga_convert_color( &bgra[0], &rgb[0], tga_struct->tga.img_spec_pix_depth, tga_struct->alphabits);
tga_write_pixel_to_mem( dst, tga_struct->orientation, i + l, line_width, &rgb[0]);
}
i += repcount;
}
}
}
return( src);
}
/*==================================================================================*
* int16 unpack_line: *
* Call the "source's buffer to destination's buffer" and *
* "image to source's buffer" functions. *
*----------------------------------------------------------------------------------*
* input: *
* tga_struct -> tga_pic struct. with all the wanted information. *
* dst -> the destination buffer. *
*----------------------------------------------------------------------------------*
* return: *
* 1 if ok else 0. *
*==================================================================================*/
static int16 unpack_line( tga_pic *tga_struct, uint8 *dst)
{
uint8 *line_begin;
int32 read;
line_begin = tga_struct->img_buf + tga_struct->img_buf_offset;
read = ( int32)( unpack_line1( tga_struct, line_begin, dst, ( uint16)tga_struct->tga.img_spec_width) - line_begin);
if( fill_img_buf( tga_struct, read))
return ( 1);
else
return ( 0);
}
/*==================================================================================*
* boolean CDECL reader_read: *
* This function fits the buffer with image data *
*----------------------------------------------------------------------------------*
* input: *
* buffer -> The destination buffer. *
* info -> The IMGINFO struct. to fit. *
*----------------------------------------------------------------------------------*
* return: *
* TRUE if all ok else FALSE. *
*==================================================================================*/
boolean CDECL reader_read( IMGINFO info, uint8 *buffer)
{
tga_pic *tga_struct = ( tga_pic*)info->_priv_ptr;
if( unpack_line( tga_struct, buffer))
return TRUE;
else
return FALSE;
}
/*==================================================================================*
* boolean CDECL reader_get_txt *
* This function , like other CDECL function mus be always present. *
* It fills txtdata struct. with the text present in the picture ( if any). *
*----------------------------------------------------------------------------------*
* input: *
* txtdata -> The destination text buffer. *
* info -> The IMGINFO struct. to fit. *
*----------------------------------------------------------------------------------*
* return: *
* -- *
*==================================================================================*/
void CDECL reader_get_txt( IMGINFO info, txt_data *txtdata)
{
return;
}
/*==================================================================================*
* boolean CDECL reader_quit: *
* This function makes the last job like close the file handler and free the *
* allocated memory. *
*----------------------------------------------------------------------------------*
* input: *
* info -> The IMGINFO struct. to fit. *
*----------------------------------------------------------------------------------*
* return: *
* -- *
*==================================================================================*/
void CDECL reader_quit( IMGINFO info)
{
tga_pic *tga_struct = ( tga_pic*)info->_priv_ptr;
Fclose( tga_struct->handle);
free( tga_struct->img_buf);
free( ( void*)tga_struct);
}
/*==================================================================================*
* boolean CDECL init: *
* First function called from zview, in this one, you can make some internal *
* initialisation. *
*----------------------------------------------------------------------------------*
* input: *
* -- *
*----------------------------------------------------------------------------------*
* return: *
* -- *
*==================================================================================*/
void CDECL init( void)
{
}
/*==================================================================================*
* int main: *
* Main function, his job is to call ldg_init function. *
*----------------------------------------------------------------------------------*
* input: *
* -- *
*----------------------------------------------------------------------------------*
* return: *
* 0 *
*==================================================================================*/
int main( void)
{
ldg_init( &tga_plugin);
return( 0);
}