static VALUE
write_png2(VALUE *args)
{
struct io_write *data;
png_structp png_ptr = (png_structp)args[0];
png_infop info_ptr = (png_infop)args[1];
VALUE scanline, image_in = args[2];
size_t i;
write_configure(image_in, png_ptr, info_ptr);
png_write_info(png_ptr, info_ptr);
for (i = 0; i < png_get_image_height(png_ptr, info_ptr); i++) {
scanline = rb_funcall(image_in, id_gets, 0);
write_scanline(scanline, png_ptr, info_ptr);
}
png_write_end(png_ptr, info_ptr);
data = (struct io_write *)png_get_io_ptr(png_ptr);
return INT2FIX(data->total);
}
int
write_scanline_rgb16 (TIFF *tif, uint16 *buffer, tsize_t size)
{
return write_scanline (tif, (tdata_t) buffer);
}
int
write_scanline_gray8 (TIFF *tif, uint8 *buffer, tsize_t size)
{
return write_scanline (tif, (tdata_t) buffer);
}
bool
ImageOutputWrap::write_scanline_bt (int y, int z, TypeDesc::BASETYPE format,
object &buffer, stride_t xstride)
{
return write_scanline (y, z, format, buffer, xstride);
}
bool
ImageOutput::write_image (TypeDesc format, const void *data,
stride_t xstride, stride_t ystride, stride_t zstride,
ProgressCallback progress_callback,
void *progress_callback_data)
{
bool native = (format == TypeDesc::UNKNOWN);
stride_t pixel_bytes = (stride_t) m_spec.pixel_bytes (native);
if (native && xstride == AutoStride)
xstride = pixel_bytes;
m_spec.auto_stride (xstride, ystride, zstride, format,
m_spec.nchannels, m_spec.width, m_spec.height);
if (supports ("rectangles")) {
// Use a rectangle if we can
return write_rectangle (0, m_spec.width-1, 0, m_spec.height-1, 0, m_spec.depth-1,
format, data, xstride, ystride, zstride);
}
bool ok = true;
if (progress_callback)
if (progress_callback (progress_callback_data, 0.0f))
return ok;
if (m_spec.tile_width && supports ("tiles")) {
// Tiled image
// FIXME: what happens if the image dimensions are smaller than
// the tile dimensions? Or if one of the tiles runs past the
// right or bottom edge? Do we need to allocate a full tile and
// copy into it before calling write_tile? That's probably the
// safe thing to do. Or should that handling be pushed all the
// way into write_tile itself?
// Locally allocate a single tile to gracefully deal with image
// dimensions smaller than a tile, or if one of the tiles runs
// past the right or bottom edge. Then we copy from our tile to
// the user data, only copying valid pixel ranges.
size_t tilexstride = pixel_bytes;
size_t tileystride = tilexstride * m_spec.tile_width;
size_t tilezstride = tileystride * m_spec.tile_height;
size_t tile_pixels = (size_t)m_spec.tile_width * (size_t)m_spec.tile_height *
(size_t)std::max(1,m_spec.tile_depth);
std::vector<char> pels (tile_pixels * pixel_bytes);
for (int z = 0; z < m_spec.depth; z += m_spec.tile_depth)
for (int y = 0; y < m_spec.height; y += m_spec.tile_height) {
for (int x = 0; x < m_spec.width && ok; x += m_spec.tile_width) {
// Now copy out the scanlines
// FIXME -- can we do less work for the tiles that
// don't overlap image boundaries?
int ntz = std::min (z+m_spec.tile_depth, m_spec.depth) - z;
int nty = std::min (y+m_spec.tile_height, m_spec.height) - y;
int ntx = std::min (x+m_spec.tile_width, m_spec.width) - x;
for (int tz = 0; tz < ntz; ++tz) {
for (int ty = 0; ty < nty; ++ty) {
// FIXME -- doesn't work for non-contiguous scanlines
memcpy (&pels[ty*tileystride+tz*tilezstride],
(char *)data + x*xstride + (y+ty)*ystride + (z+tz)*zstride,
ntx*tilexstride);
}
}
ok &= write_tile (x+m_spec.x, y+m_spec.y, z+m_spec.z,
format, &pels[0]);
}
if (progress_callback)
if (progress_callback (progress_callback_data, (float)y/m_spec.height))
return ok;
}
} else {
// Scanline image
for (int z = 0; z < m_spec.depth; ++z)
for (int y = 0; y < m_spec.height && ok; ++y) {
ok &= write_scanline (y+m_spec.y, z+m_spec.z, format,
(const char *)data + z*zstride + y*ystride,
xstride);
if (progress_callback && !(y & 0x0f))
if (progress_callback (progress_callback_data, (float)y/m_spec.height))
return ok;
}
}
if (progress_callback)
progress_callback (progress_callback_data, 1.0f);
return ok;
}
