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-rw-r--r--libdimension/Makefile.am1
-rw-r--r--libdimension/canvas_pigment.c58
-rw-r--r--libdimension/dimension/pigments.h2
3 files changed, 61 insertions, 0 deletions
diff --git a/libdimension/Makefile.am b/libdimension/Makefile.am
index 9774202..d32643a 100644
--- a/libdimension/Makefile.am
+++ b/libdimension/Makefile.am
@@ -52,6 +52,7 @@ libdimension_la_SOURCES = $(nobase_include_HEADERS) \
bvst.h \
camera.c \
canvas.c \
+ canvas_pigment.c \
color.c \
cube.c \
csg.c \
diff --git a/libdimension/canvas_pigment.c b/libdimension/canvas_pigment.c
new file mode 100644
index 0000000..b4c6823
--- /dev/null
+++ b/libdimension/canvas_pigment.c
@@ -0,0 +1,58 @@
+/*************************************************************************
+ * Copyright (C) 2010 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of The Dimension Library. *
+ * *
+ * The Dimension Library is free software; you can redistribute it and/ *
+ * or modify it under the terms of the GNU Lesser General Public License *
+ * as published by the Free Software Foundation; either version 3 of the *
+ * License, or (at your option) any later version. *
+ * *
+ * The Dimension Library is distributed in the hope that it will be *
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "dimension.h"
+
+/* Canvas color pigment callback */
+static dmnsn_color dmnsn_canvas_pigment_fn(const dmnsn_pigment *pigment,
+ dmnsn_vector v);
+static void dmnsn_canvas_pigment_free_fn(void *ptr);
+
+/* Create a canvas color */
+dmnsn_pigment *
+dmnsn_new_canvas_pigment(dmnsn_canvas *canvas)
+{
+ dmnsn_pigment *pigment = dmnsn_new_pigment();
+ pigment->pigment_fn = &dmnsn_canvas_pigment_fn;
+ pigment->free_fn = &dmnsn_canvas_pigment_free_fn;
+ pigment->ptr = canvas;
+ return pigment;
+}
+
+/* Canvas color callback */
+static dmnsn_color
+dmnsn_canvas_pigment_fn(const dmnsn_pigment *pigment, dmnsn_vector v)
+{
+ dmnsn_canvas *canvas = pigment->ptr;
+
+ int x = v.x*(canvas->x - 1) + 0.5;
+ int y = v.x*(canvas->x - 1) + 0.5;
+ if (x >= 0 && y >= 0 && x < canvas->x && y < canvas->y) {
+ return dmnsn_get_pixel(canvas, x, y);
+ } else {
+ return dmnsn_black;
+ }
+}
+
+static void
+dmnsn_canvas_pigment_free_fn(void *ptr)
+{
+ dmnsn_delete_canvas(ptr);
+}
diff --git a/libdimension/dimension/pigments.h b/libdimension/dimension/pigments.h
index f99b6c9..c8d6a39 100644
--- a/libdimension/dimension/pigments.h
+++ b/libdimension/dimension/pigments.h
@@ -27,5 +27,7 @@
/* A solid color */
dmnsn_pigment *dmnsn_new_solid_pigment(dmnsn_color color);
+/* An image map */
+dmnsn_pigment *dmnsn_new_canvas_pigment(dmnsn_canvas *canvas);
#endif /* DIMENSION_PIGMENTS_H */