size_t ppm_to_patch(void **lumpdata, const char *filename,
int insert_x, int insert_y)
{
void *data;
size_t size = read_or_die(&data, filename);
int i, width, height, *column_colours;
unsigned char *pixels, **columns, *patch;
size_t *columnsizes, totalcolumnsize, offset;
pixels = parseppm(data, size, filename, &width, &height);
columns = xmalloc(width * sizeof(*columns));
columnsizes = xmalloc(width * sizeof(*columnsizes));
column_colours = xmalloc(height * sizeof(*column_colours));
for (totalcolumnsize = i = 0; i < width; i++)
{
pixels_to_colours(column_colours, pixels, width, height, i);
columnsizes[i] = createcolumn(&columns[i], column_colours, height);
totalcolumnsize += columnsizes[i];
}
patch = xmalloc(8+4*width+totalcolumnsize);
((short *)patch)[0] = SHORT(width);
((short *)patch)[1] = SHORT(height);
((short *)patch)[2] = SHORT(insert_x);
((short *)patch)[3] = SHORT(insert_y);
for (offset = 8+4*width, i = 0; i < width; i++)
{
((int *)(patch+8))[i] = LONG(offset);
offset += columnsizes[i];
}
for (offset = 8+4*width, i = 0; i < width; i++)
{
memmove(patch + offset, columns[i], columnsizes[i]);
offset += columnsizes[i];
free(columns[i]);
}
free(column_colours);
free(columnsizes);
free(columns);
free(data);
*lumpdata = patch;
return 8+4*width+totalcolumnsize;
}
size_t ppm_to_bitmap(void **lumpdata, const char *filename)
{
void *data;
size_t size = read_or_die(&data, filename);
int i, j, width, height;
unsigned char *pixels, *bitmap;
pixels = parseppm(data, size, filename, &width, &height);
bitmap = xmalloc(width * height);
for (j = 0; j < height; j++)
for (i = 0; i < width; i++)
bitmap[width*j+i] = palette_getindex(&pixels[3*(width*j+i)]);
free(data);
*lumpdata = bitmap;
return width * height;
}
