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Save_PRG() supports C64 hires bitmap mode

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This commit is contained in:
Thomas Bernard
2020-01-02 01:55:50 +01:00
parent c820ba61ac
commit 19dec01d4f
2 changed files with 121 additions and 64 deletions
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64
src/c64formats.c
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@@ -1161,15 +1161,17 @@ static int Save_C64_window(enum c64_format *saveFormat, byte *saveWhat, word *lo
return button==1;
}
/// Save a C64 hires picture
///
/// c64 hires is 320x200 with only 2 colors per 8x8 block.
static int Save_C64_hires(T_IO_Context *context, byte saveWhat, word loadAddr)
/**
* Encode a C64 HiRes Bitmap picture.
* 320x200 pixels, with only 2 different colors per 8x8 block.
*
* 8000 bytes bitmap, 1000 bytes screen RAM
*/
static int Encode_C64_hires(T_IO_Context * context, byte * bitmap, byte * screen_ram)
{
int i, pos = 0;
word cx, cy, x, y;
byte screen_ram[1000],bitmap[8000];
FILE *file;
for(cy=0; cy<25; cy++) // Character line, 25 lines
{
@@ -1246,7 +1248,21 @@ static int Save_C64_hires(T_IO_Context *context, byte saveWhat, word loadAddr)
}
}
}
return 0;
}
/// Save a C64 hires picture
///
/// c64 hires is 320x200 with only 2 colors per 8x8 block.
static int Save_C64_hires(T_IO_Context *context, byte saveWhat, word loadAddr)
{
byte screen_ram[1000],bitmap[8000];
FILE *file;
int ret;
ret = Encode_C64_hires(context, bitmap, screen_ram);
if (ret != 0)
return ret;
file = Open_file_write(context);
if(!file)
@@ -1722,7 +1738,17 @@ void Save_PRG(T_IO_Context * context)
saveFormat = (context->Width == 320) ? F_hires : F_multi;
File_error = 1;
Set_saving_layer(context, 0);
File_error = Encode_C64_multicolor(context, bitmap, screen_ram, color_ram, &background);
switch (saveFormat)
{
case F_hires:
File_error = Encode_C64_hires(context, bitmap, screen_ram);
break;
case F_multi:
File_error = Encode_C64_multicolor(context, bitmap, screen_ram, color_ram, &background);
break;
default:
GFX2_Log(GFX2_ERROR, "Save_PRG(): format %d not handled (yet?)\n", saveFormat);
}
if (File_error == 0)
{
FILE *file;
@@ -1736,7 +1762,7 @@ void Save_PRG(T_IO_Context * context)
}
if (!Write_bytes(file, picview_prg, sizeof(picview_prg)))
File_error = 2;
Write_byte(file, 0x30); // Mode : Bitmap + Multicolor
Write_byte(file, saveFormat == F_multi ? 0x30 : 0x20); // Mode : 0x40 Extended bg, 0x20 Bitmap, 0x10 Multicolor
n = PackBits_pack_buffer(NULL, bitmap, 8000);
GFX2_Log(GFX2_DEBUG, "PackBits of bitmap : 8000 => %d bytes\n", n + 1);
if (n >= 0 && n < 7999)
@@ -1764,15 +1790,19 @@ void Save_PRG(T_IO_Context * context)
Write_byte(file, 0x20); // screen RAM / no packing
Write_bytes(file, screen_ram, 1000);
}
//Write_byte(file, 0x30); // color RAM / no packing
//Write_bytes(file, color_ram, 1000);
Write_byte(file, 0x32); // color RAM / special color RAM packing
n = C64_color_ram_pack(file, color_ram, 1000);
if (n < 0)
File_error = 1;
GFX2_Log(GFX2_DEBUG, "custom packing of color RAM : 1000 => %d bytes\n", n);
Write_byte(file, 0x42); // border/background/etc. / color ram RLE packing
Write_byte(file, background | 0x10);
if (saveFormat == F_multi)
{
//Write_byte(file, 0x30); // color RAM / no packing
//Write_bytes(file, color_ram, 1000);
Write_byte(file, 0x32); // color RAM / special color RAM packing
n = C64_color_ram_pack(file, color_ram, 1000);
if (n < 0)
File_error = 1;
GFX2_Log(GFX2_DEBUG, "custom packing of color RAM : 1000 => %d bytes\n", n);
Write_byte(file, 0x42); // border/background/etc. / color ram RLE packing
Write_byte(file, background | 0x10);
}
Write_byte(file, 0); // end of file
fclose(file);
}