1 files changed, 95 insertions, 0 deletions
diff --git a/src/libnr/nr-pixblock.h b/src/libnr/nr-pixblock.h
new file mode 100644
index 000000000..2a13dd921
--- /dev/null
+++ b/src/libnr/nr-pixblock.h
@@ -0,0 +1,95 @@
+#ifndef __NR_PIXBLOCK_H__
+#define __NR_PIXBLOCK_H__
+
+/** \file
+ * \brief Pixel block structure. Used for low-level rendering.
+ *
+ * Authors:
+ *   (C) 1999-2002 Lauris Kaplinski <lauris@kaplinski.com>
+ *   (C) 2005 Ralf Stephan <ralf@ark.in-berlin.de> (some cleanup)
+ *
+ * This code is in the Public Domain.
+ */
+
+#include <libnr/nr-rect-l.h>
+#include <libnr/nr-forward.h>
+
+/// Size indicator. Hardcoded to max. 3 bits.
+typedef enum {
+	NR_PIXBLOCK_SIZE_TINY, ///< Fits in (unsigned char *)
+	NR_PIXBLOCK_SIZE_4K,   ///< Pixelstore 
+	NR_PIXBLOCK_SIZE_16K,  ///< Pixelstore 
+	NR_PIXBLOCK_SIZE_64K,  ///< Pixelstore 
+	NR_PIXBLOCK_SIZE_256K,  ///< Pixelstore 
+	NR_PIXBLOCK_SIZE_1M,  ///< Pixelstore 
+	NR_PIXBLOCK_SIZE_BIG,  ///< Normally allocated 
+	NR_PIXBLOCK_SIZE_STATIC ///< Externally managed 
+} NR_PIXBLOCK_SIZE;
+
+/// Mode indicator. Hardcoded to max. 2 bits.
+typedef enum {
+	NR_PIXBLOCK_MODE_A8,        ///< Grayscale
+	NR_PIXBLOCK_MODE_R8G8B8,    ///< 8 bit RGB
+	NR_PIXBLOCK_MODE_R8G8B8A8N, ///< Normal 8 bit RGBA
+	NR_PIXBLOCK_MODE_R8G8B8A8P  ///< Premultiplied 8 bit RGBA
+} NR_PIXBLOCK_MODE;
+
+/// The pixel block struct.
+struct NRPixBlock {
+	NR_PIXBLOCK_SIZE size : 3; ///< Size indicator
+	NR_PIXBLOCK_MODE mode : 2; ///< Mode indicator
+	bool empty : 1;            ///< Empty flag
+	unsigned int rs;           ///< Size of line in bytes
+	NRRectL area;
+	union {
+		unsigned char *px; ///< Pointer to buffer
+		unsigned char p[sizeof (unsigned char *)]; ///< Tiny buffer
+	} data;
+};
+
+/// Returns number of bytes per pixel (1, 3, or 4).
+inline int 
+NR_PIXBLOCK_BPP (NRPixBlock *pb)
+{ 
+    return ((pb->mode == NR_PIXBLOCK_MODE_A8) ? 1 : 
+            (pb->mode == NR_PIXBLOCK_MODE_R8G8B8) ? 3 : 4); 
+}
+    
+/// Returns pointer to pixel data.
+inline unsigned char*
+NR_PIXBLOCK_PX (NRPixBlock *pb) 
+{ 
+    return ((pb->size == NR_PIXBLOCK_SIZE_TINY) ? 
+            pb->data.p : pb->data.px);
+}
+
+void nr_pixblock_setup (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
+void nr_pixblock_setup_fast (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
+void nr_pixblock_setup_extern (NRPixBlock *pb, NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, unsigned char *px, int rs, bool empty, bool clear);
+void nr_pixblock_release (NRPixBlock *pb);
+
+NRPixBlock *nr_pixblock_new (NR_PIXBLOCK_MODE mode, int x0, int y0, int x1, int y1, bool clear);
+NRPixBlock *nr_pixblock_free (NRPixBlock *pb);
+
+unsigned char *nr_pixelstore_4K_new (bool clear, unsigned char val);
+void nr_pixelstore_4K_free (unsigned char *px);
+unsigned char *nr_pixelstore_16K_new (bool clear, unsigned char val);
+void nr_pixelstore_16K_free (unsigned char *px);
+unsigned char *nr_pixelstore_64K_new (bool clear, unsigned char val);
+void nr_pixelstore_64K_free (unsigned char *px);
+unsigned char *nr_pixelstore_256K_new (bool clear, unsigned char val);
+void nr_pixelstore_256K_free (unsigned char *px);
+unsigned char *nr_pixelstore_1M_new (bool clear, unsigned char val);
+void nr_pixelstore_1M_free (unsigned char *px);
+
+#endif
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :