avoid a possible sign-extension for offsets/sizes in SGI

[imager.git] / immacros.h

diff --git a/immacros.h b/immacros.h
index 81ad3af0eacf12f3031c4c1997116c020f0c5745..8b45f58781ee50e888dfa10ea5b498766999791b 100644 (file)
--- a/immacros.h
+++ b/immacros.h
@@ -16,19 +16,7 @@ Return true if the image has an alpha channel.
 =cut
 */
 
-#define i_img_has_alpha(im) ((im)->channels == 2 || (im)->channels == 4)
-
-/*
-=item i_img_color_channels(C<im>)
-
-=category Image Information
-
-The number of channels holding color information.
-
-=cut
-*/
-
-#define i_img_color_channels(im) (i_img_has_alpha(im) ? (im)->channels - 1 : (im)->channels)
+#define i_img_has_alpha(im) (i_img_alpha_channel((im), NULL))
 
 /*
 =item i_psamp(im, left, right, y, samples, channels, channel_count)
@@ -75,4 +63,92 @@ returns -1 and pushes an error.
 #define i_psampf(im, l, r, y, samps, chans, count) \
   (((im)->i_f_psampf)((im), (l), (r), (y), (samps), (chans), (count)))
 
+#ifndef IMAGER_DIRECT_IMAGE_CALLS
+#define IMAGER_DIRECT_IMAGE_CALLS 1
+#endif
+
+#if IMAGER_DIRECT_IMAGE_CALLS
+
+#define i_ppix(im, x, y, val) (((im)->i_f_ppix)((im), (x), (y), (val)))
+#define i_gpix(im, x, y, val) (((im)->i_f_gpix)((im), (x), (y), (val)))
+#define i_ppixf(im, x, y, val) (((im)->i_f_ppixf)((im), (x), (y), (val)))
+#define i_gpixf(im, x, y, val) (((im)->i_f_gpixf)((im), (x), (y), (val)))
+#define i_plin(im, l, r, y, val) (((im)->i_f_plin)(im, l, r, y, val))
+#define i_glin(im, l, r, y, val) (((im)->i_f_glin)(im, l, r, y, val))
+#define i_plinf(im, l, r, y, val) (((im)->i_f_plinf)(im, l, r, y, val))
+#define i_glinf(im, l, r, y, val) (((im)->i_f_glinf)(im, l, r, y, val))
+
+#define i_gsamp(im, l, r, y, samps, chans, count) \
+  (((im)->i_f_gsamp)((im), (l), (r), (y), (samps), (chans), (count)))
+#define i_gsampf(im, l, r, y, samps, chans, count) \
+  (((im)->i_f_gsampf)((im), (l), (r), (y), (samps), (chans), (count)))
+
+#endif
+
+#define i_gsamp_bits(im, l, r, y, samps, chans, count, bits) \
+       (((im)->i_f_gsamp_bits) ? ((im)->i_f_gsamp_bits)((im), (l), (r), (y), (samps), (chans), (count), (bits)) : -1)
+#define i_psamp_bits(im, l, r, y, samps, chans, count, bits) \
+       (((im)->i_f_psamp_bits) ? ((im)->i_f_psamp_bits)((im), (l), (r), (y), (samps), (chans), (count), (bits)) : -1)
+
+#define i_findcolor(im, color, entry) \
+  (((im)->i_f_findcolor) ? ((im)->i_f_findcolor)((im), (color), (entry)) : 0)
+
+#define i_gpal(im, l, r, y, vals) \
+  (((im)->i_f_gpal) ? ((im)->i_f_gpal)((im), (l), (r), (y), (vals)) : 0)
+#define i_ppal(im, l, r, y, vals) \
+  (((im)->i_f_ppal) ? ((im)->i_f_ppal)((im), (l), (r), (y), (vals)) : 0)
+#define i_addcolors(im, colors, count) \
+  (((im)->i_f_addcolors) ? ((im)->i_f_addcolors)((im), (colors), (count)) : -1)
+#define i_getcolors(im, index, color, count) \
+  (((im)->i_f_getcolors) ? \
+   ((im)->i_f_getcolors)((im), (index), (color), (count)) : 0)
+#define i_setcolors(im, index, color, count) \
+  (((im)->i_f_setcolors) ? \
+   ((im)->i_f_setcolors)((im), (index), (color), (count)) : 0)
+#define i_colorcount(im) \
+  (((im)->i_f_colorcount) ? ((im)->i_f_colorcount)(im) : -1)
+#define i_maxcolors(im) \
+  (((im)->i_f_maxcolors) ? ((im)->i_f_maxcolors)(im) : -1)
+#define i_findcolor(im, color, entry) \
+  (((im)->i_f_findcolor) ? ((im)->i_f_findcolor)((im), (color), (entry)) : 0)
+
+#define i_img_virtual(im) ((im)->virtual)
+#define i_img_type(im) ((im)->type)
+#define i_img_bits(im) ((im)->bits)
+
+#define pIMCTX im_context_t my_im_ctx
+
+#ifdef IMAGER_NO_CONTEXT
+#define dIMCTXctx(ctx) pIMCTX = (ctx)
+#define dIMCTX dIMCTXctx(im_get_context())
+#define dIMCTXim(im) dIMCTXctx((im)->context)
+#define dIMCTXio(io) dIMCTXctx((io)->context)
+#define aIMCTX my_im_ctx
+#else
+#define aIMCTX im_get_context()
+#endif
+
+#define i_img_8_new(xsize, ysize, channels) im_img_8_new(aIMCTX, (xsize), (ysize), (channels))
+#define i_img_16_new(xsize, ysize, channels) im_img_16_new(aIMCTX, (xsize), (ysize), (channels))
+#define i_img_double_new(xsize, ysize, channels) im_img_double_new(aIMCTX, (xsize), (ysize), (channels))
+#define i_img_pal_new(xsize, ysize, channels, maxpal) im_img_pal_new(aIMCTX, (xsize), (ysize), (channels), (maxpal))
+
+#define i_img_alloc() im_img_alloc(aIMCTX)
+#define i_img_init(im) im_img_init(aIMCTX, im)
+
+#define i_set_image_file_limits(width, height, bytes) im_set_image_file_limits(aIMCTX, width, height, bytes)
+#define i_get_image_file_limits(width, height, bytes) im_get_image_file_limits(aIMCTX, width, height, bytes)
+#define i_int_check_image_file_limits(width, height, channels, sample_size) im_int_check_image_file_limits(aIMCTX, width, height, channels, sample_size)
+
+#define i_clear_error() im_clear_error(aIMCTX)
+#define i_push_errorvf(code, fmt, args) im_push_errorvf(aIMCTX, code, fmt, args)
+#define i_push_error(code, msg) im_push_error(aIMCTX, code, msg)
+#define i_errors() im_errors(aIMCTX)
+
+#define io_new_fd(fd) im_io_new_fd(aIMCTX, (fd))
+#define io_new_bufchain() im_io_new_bufchain(aIMCTX)
+#define io_new_buffer(data, len, closecb, closectx) im_io_new_buffer(aIMCTX, (data), (len), (closecb), (closectx))
+#define io_new_cb(p, readcb, writecb, seekcb, closecb, destroycb) \
+  im_io_new_cb(aIMCTX, (p), (readcb), (writecb), (seekcb), (closecb), (destroycb))
+
 #endif