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Load_IFF() animations. Support XOR in mode 5 and frame interleave of 2

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This commit is contained in:
Thomas Bernard 2018-02-07 23:31:29 +01:00
parent f0c5854021
commit c1f5ec0381
1 changed files with 34 additions and 35 deletions
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65
src/fileformats.c
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@ -650,6 +650,7 @@ void Load_IFF(T_IO_Context * context)
T_IFF_PCHG_Palette * PCHG_palettes = NULL;
int current_frame = 0;
byte * previous_frame = NULL; // For animations
byte * anteprevious_frame = NULL;
memset(&aheader, 0, sizeof(aheader));
@ -784,10 +785,12 @@ void Load_IFF(T_IO_Context * context)
int i, plane;
dword offsets[16];
dword current_offset = 0;
byte * frame;
if (Image_HAM > 1)
{
Warning("HAM animations are not supported");
//Verbose_message("Notice", "HAM animations are not supported, loading only first frame"); // TODO: causes an issue with colors
break;
}
if (previous_frame == NULL)
@ -806,11 +809,19 @@ void Load_IFF(T_IO_Context * context)
Set_IFF_color(previous_frame+y_pos*line_size, x_pos, *pix_p++, real_line_size, real_bit_planes);
}
}
// many animations are designed for double buffering
// and delta is against frame n-2
anteprevious_frame = malloc(line_size * context->Height);
memcpy(anteprevious_frame, previous_frame, line_size * context->Height);
}
Set_loading_layer(context, ++current_frame);
if(aheader.operation == 5)
frame = previous_frame;
if(aheader.operation == 5) // Byte Vertical Delta mode
{
if (aheader.interleave != 1)
frame = anteprevious_frame;
for (i = 0; i < 16; i++)
{
if (!Read_dword_be(IFF_file, offsets+i))
@ -843,7 +854,7 @@ void Load_IFF(T_IO_Context * context)
}
for (x_pos = 0; x_pos < (context->Width+7) >> 3; x_pos++)
{
byte * p = previous_frame + x_pos + plane * plane_line_size;
byte * p = frame + x_pos + plane * plane_line_size;
y_pos = 0;
Read_byte(IFF_file, &op_count);
current_offset++;
@ -864,6 +875,9 @@ void Load_IFF(T_IO_Context * context)
current_offset += 2;
while(countb > 0 && y_pos < context->Height)
{
if(aheader.bits & 2) // XOR
*p ^= datab;
else // set
*p = datab;
p += line_size;
y_pos++;
@ -880,6 +894,9 @@ void Load_IFF(T_IO_Context * context)
current_offset++;
if (y_pos < context->Height)
{
if(aheader.bits & 2) // XOR
*p ^= datab;
else // set
*p = datab;
p += line_size;
y_pos++;
@ -931,7 +948,7 @@ void Load_IFF(T_IO_Context * context)
y_start = offset / plane_line_size;
for (plane = 0; plane < real_bit_planes; plane++)
{
byte * p = previous_frame + plane * plane_line_size;
byte * p = frame + plane * plane_line_size;
p += x_start + y_start*line_size;
for (y_pos=0; y_pos < y_size; y_pos++)
{
@ -962,7 +979,7 @@ void Load_IFF(T_IO_Context * context)
y_start = offset / plane_line_size;
for (plane = 0; plane < real_bit_planes; plane++)
{
byte * p = previous_frame + plane * plane_line_size;
byte * p = frame + plane * plane_line_size;
p += x_start + y_start*line_size;
for (y_pos=0; y_pos < y_size; y_pos++)
{
@ -1004,9 +1021,14 @@ void Load_IFF(T_IO_Context * context)
{
for (y_pos=0; y_pos<context->Height; y_pos++)
{
Draw_IFF_line(context, previous_frame+line_size*y_pos,y_pos,real_line_size,real_bit_planes);
Draw_IFF_line(context, frame+line_size*y_pos,y_pos,real_line_size,real_bit_planes);
}
}
if (aheader.operation == 5 && aheader.interleave != 1)
{
anteprevious_frame = previous_frame;
previous_frame = frame;
}
if (current_offset&1)
{
byte dummy_byte;
@ -1020,6 +1042,8 @@ void Load_IFF(T_IO_Context * context)
{
nb_colors = section_size/3;
if (current_frame != 0)
Warning("One CMAP per frame is not supported");
if ((header.BitPlanes==6 && nb_colors==16) || (header.BitPlanes==8 && nb_colors==64))
{
Image_HAM=header.BitPlanes;
@ -1088,7 +1112,7 @@ void Load_IFF(T_IO_Context * context)
{
Read_dword_be(IFF_file, &AmigaViewModes); // HIRES=0x8000 LACE=0x4 HAM=0x800 HALFBRITE=0x80
section_size -= 4;
if (AmigaViewModes & 0x800)
if (AmigaViewModes & 0x800 && (header.BitPlanes == 6 || header.BitPlanes == 8))
{
Image_HAM = header.BitPlanes;
bpp = 3 * (header.BitPlanes - 2);
@ -1600,32 +1624,6 @@ printf("%d x %d = %d %d\n", tiny_width, tiny_height, tiny_width*tiny_height, s
fseek(IFF_file, (section_size+1)&~1, SEEK_CUR);
}
}
/*
while (!File_error && is_anim)
{
dword delta_size;
// Just loaded the first image successfully : now keep reading
// FORM + size(4)
if (!Read_bytes(IFF_file,section,4))
break;
Read_dword_be(IFF_file,&dummy);
// ILBM, hopefully
Read_bytes(IFF_file,format,4);
if (!IFF_Wait_for(IFF_file, "DLTA"))
{
File_error=1;
break;
}
Set_loading_layer(context, context->Current_layer+1);
Read_dword_be(IFF_file,&delta_size);
fseek(IFF_file, delta_size + (delta_size & 1), SEEK_CUR);
}
*/
}
fclose(IFF_file);
@ -1637,6 +1635,8 @@ printf("%d x %d = %d %d\n", tiny_width, tiny_height, tiny_width*tiny_height, s
free(SHAM_palettes);
if (previous_frame)
free(previous_frame);
if (anteprevious_frame)
free(anteprevious_frame);
while (PCHG_palettes != NULL)
{
T_IFF_PCHG_Palette * next = PCHG_palettes->Next;
@ -5610,4 +5610,3 @@ void Save_PNG(T_IO_Context * context)
}
#endif // __no_pnglib__
plane, x_pos, y_pos, context->Height, i, op_count, current_offset)2