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Save_XPM(): save 1 char per pixel if possible

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" and \ are not valid characters for XPM pixels
This commit is contained in:
Thomas Bernard 2018-02-20 13:59:15 +01:00
parent 07db9f1567
commit 999458d047
1 changed files with 51 additions and 13 deletions
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50
src/fileformats.c
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@ -5133,6 +5133,8 @@ void Save_XPM(T_IO_Context* context)
// XPM are unix files, so use LF '\n' line endings
FILE* file;
int i,j;
byte max_color = 0;
word color_count;
File_error = 0;
@ -5145,12 +5147,43 @@ void Save_XPM(T_IO_Context* context)
setvbuf(file, NULL, _IOFBF, 64*1024);
// in case there are less colors than 256, we could
// optimize, and use only 1 character per pixel if possible
fprintf(file, "/* XPM */\nstatic char* pixmap[] = {\n");
fprintf(file, "\"%d %d 256 2\",\n", context->Width, context->Height);
for (i = 0; i < 256; i++)
// printable characters are from 0x20 to 0x7e, minus " 0x22 and \ 0x5c
#define XPM_USABLE_CHARS (0x7f - 0x20 - 2)
for (j = 0; j < context->Height; j++)
for (i = 0; i < context->Width; i++)
{
fprintf(file,"\"%2.2X c #%2.2x%2.2x%2.2x\",\n", i, context->Palette[i].R, context->Palette[i].G,
byte value = Get_pixel(context, i, j);
if (value > max_color)
max_color = value;
}
color_count = (word)max_color + 1;
fprintf(file, "/* XPM */\nstatic char* pixmap[] = {\n");
fprintf(file, "\"%d %d %d %d\",\n", context->Width, context->Height, color_count, color_count > XPM_USABLE_CHARS ? 2 : 1);
if (color_count > XPM_USABLE_CHARS)
{
// none is for transparent color
for (i = 0; i < color_count; i++)
fprintf(file,"\"%2.2X\tc #%2.2x%2.2x%2.2x\",\n", i, context->Palette[i].R, context->Palette[i].G,
context->Palette[i].B);
for (j = 0; j < context->Height; j++)
{
fprintf(file, "\"");
for (i = 0; i < context->Width; i++)
fprintf(file, "%2.2X", Get_pixel(context, i, j));
fprintf(file,"\"\n");
}
}
else
{
int c;
for (i = 0; i < color_count; i++)
{
c = (i < 2) ? i + 0x20 : i + 0x21;
if (c >= 0x5c) c++;
fprintf(file,"\"%c\tc #%2.2x%2.2x%2.2x\",\n", c, context->Palette[i].R, context->Palette[i].G,
context->Palette[i].B);
}
@ -5159,10 +5192,15 @@ void Save_XPM(T_IO_Context* context)
fprintf(file, "\"");
for (i = 0; i < context->Width; i++)
{
fprintf(file, "%2.2X", Get_pixel(context, i, j));
c = Get_pixel(context, i, j);
c = (c < 2) ? c + 0x20 : c + 0x21;
if (c >= 0x5c) c++;
fprintf(file, "%c", c);
}
fprintf(file,"\"\n");
}
}
fprintf(file, "};\n");
fclose(file);
}