m/grafX2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Code for loading "CM5" (CPC Mode 5) pixtures

Browse Source 
* Fix a bug in the Set_layer function : it was only possible to set a new layer, and this format needs us to write to previous layers too
 * Saving is missing (you need to save as png then convert back to cm5 using SyX converter)
 * Preview does not work (it does not use layers, so the result is broken)
 * Loading switches the "8bit" mode on automatically

git-svn-id: svn://pulkomandy.tk/GrafX2/branches/cpcmode5@1723 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Adrien Destugues
2011-02-15 17:48:16 +00:00
parent 72e9892b53
commit bf9c34d7fe
3 changed files with 180 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

171
src/miscfileformats.c
View File

@@ -6,7 +6,7 @@
Copyright 2009 Petter Lindquist
Copyright 2008 Yves Rizoud
Copyright 2008 Franck Charlet
Copyright 2007 Adrien Destugues
Copyright 2007-2011 Adrien Destugues
Copyright 1996-2001 Sunset Design (Guillaume Dorme & Karl Maritaud)
Grafx2 is free software; you can redistribute it and/or
@@ -2926,3 +2926,172 @@ void Save_SCR(T_IO_Context * context)
File_error = 0;
}
// CM5 - Amstrad CPC "Mode 5" picture
// This is a format designed by SyX. There is one .SCR file in the usual amstrad format,
// and a .CM5 file with the palette, which varies over time.
void Test_CM5(T_IO_Context * context)
{
// check cm5 file size == 2049 bytes
FILE *file;
char filename[MAX_PATH_CHARACTERS];
long file_size;
Get_full_filename(filename, context->File_name, context->File_directory);
File_error = 1;
if ((file = fopen(filename, "rb")))
{
file_size = File_length_file(file);
if (file_size == 2049)
File_error = 0;
}
// TODO: check existence of a .SCR file with the same name
}
void Load_CM5(T_IO_Context* context)
{
// Ensure "8bit" constraint mode is switched on
// Set palette to the CPC hardware colors
// Load the palette data to the 4 colorlayers
FILE *file;
char filename[MAX_PATH_CHARACTERS];
byte value = 0;
int mod;
short line = 0;
int tx, ty;
byte buffer[48*6/4];
Get_full_filename(filename, context->File_name, context->File_directory);
if (!(file = fopen(filename, "rb")))
{
File_error = 1;
return;
}
Pre_load(context, 48*6, 256, 2049, FORMAT_CM5, PIXEL_SIMPLE, 0);
context->Width=48*6;
context->Height=256;
// Setup the palette (amstrad hardware palette)
context->Palette[0x54].R = 0; context->Palette[0x54].G = 2; context->Palette[0x54].B = 1;
context->Palette[0x44].R = 0; context->Palette[0x44].G = 2; context->Palette[0x44].B = 0x6B;
context->Palette[0x55].R = 0x0C; context->Palette[0x55].G = 2; context->Palette[0x55].B = 0xF4;
context->Palette[0x5C].R = 0x6C; context->Palette[0x5C].G = 2; context->Palette[0x5C].B = 1;
context->Palette[0x58].R = 0x69; context->Palette[0x58].G = 2; context->Palette[0x58].B = 0x68;
context->Palette[0x5D].R = 0x6C; context->Palette[0x5D].G = 2; context->Palette[0x5D].B = 0xF2;
context->Palette[0x4C].R = 0xF3; context->Palette[0x4C].G = 5; context->Palette[0x4C].B = 6;
context->Palette[0x45].R = 0xF0; context->Palette[0x45].G = 2; context->Palette[0x45].B = 0x68;
context->Palette[0x4D].R = 0xF3; context->Palette[0x4D].G = 2; context->Palette[0x4D].B = 0xF4;
context->Palette[0x56].R = 2; context->Palette[0x56].G = 0x78; context->Palette[0x56].B = 1;
context->Palette[0x46].R = 0; context->Palette[0x46].G = 0x78; context->Palette[0x46].B = 0x68;
context->Palette[0x57].R = 0xC; context->Palette[0x57].G = 0x7B; context->Palette[0x57].B = 0xF4;
context->Palette[0x5E].R = 0x6E; context->Palette[0x5E].G = 0x7B; context->Palette[0x5E].B = 1;
context->Palette[0x40].R = 0x6E; context->Palette[0x40].G = 0x7D; context->Palette[0x40].B = 0x6B;
context->Palette[0x5F].R = 0x6E; context->Palette[0x5F].G = 0x7B; context->Palette[0x5F].B = 0xF6;
context->Palette[0x4E].R = 0xF3; context->Palette[0x4E].G = 0x7D; context->Palette[0x4E].B = 0xD;
context->Palette[0x47].R = 0xF3; context->Palette[0x47].G = 0x7D; context->Palette[0x47].B = 0x6B;
context->Palette[0x4F].R = 0xFA; context->Palette[0x4F].G = 0x80; context->Palette[0x4F].B = 0xF9;
context->Palette[0x52].R = 2; context->Palette[0x52].G = 0xF0; context->Palette[0x52].B = 1;
context->Palette[0x42].R = 0; context->Palette[0x42].G = 0xF3; context->Palette[0x42].B = 0x6B;
context->Palette[0x53].R = 0xF; context->Palette[0x53].G = 0xF3; context->Palette[0x53].B = 0xF2;
context->Palette[0x5A].R = 0x71; context->Palette[0x5A].G = 0xF5; context->Palette[0x5A].B = 4;
context->Palette[0x59].R = 0x71; context->Palette[0x59].G = 0xF3; context->Palette[0x59].B = 0x6B;
context->Palette[0x5B].R = 0x71; context->Palette[0x5B].G = 0xF3; context->Palette[0x5B].B = 0xF4;
context->Palette[0x4A].R = 0xF3; context->Palette[0x4A].G = 0xF3; context->Palette[0x4A].B = 0xD;
context->Palette[0x43].R = 0xF3; context->Palette[0x43].G = 0xF3; context->Palette[0x43].B = 0x6D;
context->Palette[0x4B].R = 255; context->Palette[0x4B].G = 0xF3; context->Palette[0x4B].B = 0xF9;
Palette_loaded(context);
if (Constraint_mode != 1)
Constraint_mode = 1;
if (Read_byte(file, &value)!=1)
File_error = 2;
Set_layer(context, 0);
for(ty=0; ty<context->Height; ty++)
for(tx=0; tx<context->Width; tx++)
{
Set_pixel(context, tx, ty, value);
}
// Fill layer with color we just read
while(Read_byte(file, &value) == 1)
{
switch(mod)
{
case 0:
// This is color for layer 1
Set_layer(context, 1);
for(tx=0; tx<context->Width; tx++)
Set_pixel(context, tx, line, value);
break;
case 1:
// This is color for layer 2
Set_layer(context, 2);
for(tx=0; tx<context->Width; tx++)
Set_pixel(context, tx, line, value);
break;
default:
// This is color for a block in layer 4
Set_layer(context, 3);
for(tx=(mod-2)*48; tx<(mod-1)*48; tx++)
Set_pixel(context, tx, line, value);
break;
}
mod = mod + 1;
if (mod > 7)
{
mod = 0;
line ++;
}
}
fclose(file);
// Load the pixeldata to the 5th layer
filename[strlen(filename) - 3] = 0;
strcat(filename,"gfx");
if (!(file = fopen(filename, "rb")))
{
File_error = 1;
return;
}
Set_layer(context, 4);
for (ty = 0; ty < 256; ty++)
{
Read_bytes(file, buffer, 48*6/4);
for (tx = 0; tx < 48*6; tx+=4)
{
Set_pixel(context, tx+0, ty, 3-(((buffer[tx/4]&0x80) >> 7) |((buffer[tx/4]&0x8)>>2)));
Set_pixel(context, tx+1, ty, 3-(((buffer[tx/4]&0x40) >> 6) |((buffer[tx/4]&0x4)>>1)));
Set_pixel(context, tx+2, ty, 3-(((buffer[tx/4]&0x20) >> 5) |((buffer[tx/4]&0x2)>>0)));
Set_pixel(context, tx+3, ty, 3-(((buffer[tx/4]&0x10) >> 4) |((buffer[tx/4]&0x1)<<1)));
}
}
fclose(file);
}
void Save_CM5(T_IO_Context* context)
{
// Check picture has 5 layers
// Check the constraints on the layers
// Layer 1 : 1 color Only
// Layer 2 and 3 : 1 color/line
// Layer 4 : 1 color / 48x1 block
// Layer 5 : colors 1 to 4 only used
// Layer 1..4 are written to the .CM5 file, then layer 5 is written to .scr file using
// the Save_SCR function.
}