Add "transform_pixel_region" device function.

Use this for handling image type 4 rendering.

The default version of this goes to rectangles. It also knows how to
send portrait images of 8bps to copy_color.

Next step is to write versions of this for the memory mapped devices
to know how to go direct.

Essentially we are copying the guts of the
image_render_color_icc_{portrait,landscape,skew} into a default
device method, and making the code that called those functions
call the device method instead.

1 files changed, 8 insertions, 0 deletions

diff --git a/base/gdevsclass.c b/base/gdevsclass.c
index f02ea4a8d..d9c85d2e4 100644
--- a/base/gdevsclass.c
+++ b/base/gdevsclass.c
@@ -895,6 +895,14 @@ int default_subclass_process_page(gx_device *dev, gx_process_page_options_t *opt
     return 0;
 }
 
+int default_subclass_transform_pixel_region(gx_device *dev, transform_pixel_region_reason reason, transform_pixel_region_data *data)
+{
+    if (dev->child)
+        return dev_proc(dev->child, transform_pixel_region)(dev->child, reason, data);
+
+    return gs_error_unknownerror;
+}
+
 void default_subclass_finalize(const gs_memory_t *cmem, void *vptr)
 {
     gx_device * const dev = (gx_device *)vptr;