Adding bitblit functions

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1311 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 210 insertions, 0 deletions

diff --git a/nuttx/graphics/nxglib/nxglib_bitblit.h b/nuttx/graphics/nxglib/nxglib_bitblit.h
new file mode 100644
index 000000000..6ebb97c2b
--- /dev/null
+++ b/nuttx/graphics/nxglib/nxglib_bitblit.h
@@ -0,0 +1,210 @@
+/****************************************************************************
+ * graphics/nxglib/nxglib_bitblit.h
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H
+#define __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+
+#include <nuttx/nxglib.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/* Make sure the the bits-per-pixel value has been set by the includer of
+ * this header file.
+ */
+
+#ifndef NXGLIB_BITSPERPIXEL
+#  error "NXGLIB_BITSPERPIXEL must be defined before including this header file"
+#endif
+
+/* Set up bit blit macros for this BPP */
+
+#if NXGLIB_BITSPERPIXEL == 1
+
+#  define NX_PIXELSHIFT          3
+#  define NX_PIXELMASK           7
+#  define NX_MULTIPIXEL(p)       ((p) ? 0xff | 0x00)
+#  define NX_PIXEL_T             ubyte
+
+#elif NXGLIB_BITSPERPIXEL == 2
+
+#  define NX_PIXELSHIFT          2
+#  define NX_PIXELMASK           3
+#  define NX_MULTIPIXEL(p)       ((ubyte)(p) << 6 | (ubyte)(p) << 4 | (ubyte)(p) << 2 | (p))
+#  define NX_PIXEL_T             ubyte
+
+#elif NXGLIB_BITSPERPIXEL == 4
+
+#  define NX_PIXELSHIFT          1
+#  define NX_PIXELMASK           1
+#  define NX_MULTIPIXEL(p)       ((ubyte)(p) << 4 | (p))
+#  define NX_PIXEL_T             ubyte
+
+#elif NXGLIB_BITSPERPIXEL == 8
+
+#  define NX_SCALEX(x)           (x)
+#  define NX_PIXEL_T             ubyte
+
+#elif NXGLIB_BITSPERPIXEL == 16
+
+#  define NX_SCALEX(x)           ((x) << 1)
+#  define NX_PIXEL_T             uint16
+
+#elif NXGLIB_BITSPERPIXEL == 24
+
+#  define NX_SCALEX(x)           (((x) << 1) + (x))
+#  define NX_PIXEL_T             uint32
+
+#elif NXGLIB_BITSPERPIXEL == 32
+
+#  define NX_SCALEX(x)           ((x) << 2)
+#  define NX_PIXEL_T             uint32
+
+#endif
+
+#if NXGLIB_BITSPERPIXEL < 8
+#  define NX_SCALEX(x)           ((x) >> NX_PIXELSHIFT)
+#  define NX_REMAINDERX(x)       ((x) & NX_PIXELMASK)
+#  define NX_ALIGNDOWN(x)        ((x) & ~NX_PIXELMASK)
+#  define NX_ALIGNUP(x)          (((x) + NX_PIXELMASK) & ~NX_PIXELMASK)
+
+#  ifdef CONFIG_NX_PACKEDMSFIRST
+#    define NX_MASKEDSRC1(s,r)   ((s) & (((ubyte)0xff) >> (8 - ((r) << pixelshift))))
+#    define NX_MASKEDVALUE1(s,r) ((s) & (((ubyte)0xff) << ((r) << NX_PIXELSHFIT)))
+#    define NX_MASKEDSRC2(s,r)   ((s) & (((ubyte)0xff) >> ((r) << pixelshift)))
+#    define NX_MASKEDVALUE2(s,r) ((s) & (((ubyte)0xff) << (8 - ((r) << NX_PIXELSHFIT))))
+#  else
+#    define NX_MASKEDSRC1(s,r)   ((s) & (((ubyte)0xff) >> ((r) << pixelshift)))
+#    define NX_MASKEDVALUE1(s,r) ((s) & (((ubyte)0xff) << (8 - ((r) << NX_PIXELSHFIT))))
+#    define NX_MASKEDSRC2(s,r)   ((s) & (((ubyte)0xff) >> (8 - ((r) << pixelshift))))
+#    define NX_MASKEDVALUE2(s,r) ((s) & (((ubyte)0xff) << ((r) << NX_PIXELSHFIT)))
+#  endif
+
+#  define NXGL_MEMSET(dest,value,width) \
+   { \
+     FAR uybte *_ptr = (FAR ubyte*)dest; \
+     int nbytes      = NX_SCALEX(width)); \
+     while (nbytes--) \
+       { \
+         *_ptr++ = value; \
+       } \
+   }
+#  define NXGL_MEMCPY(dest,src,width) \
+   { \
+     FAR ubyte *_dptr = (FAR ubyte*)dest; \
+     FAR ubyte *_sptr = (FAR ubyte*)src; \
+     int nbytes      = NX_SCALEX(width)); \
+     while (npixels--) \
+       { \
+         *_dptr++ = *_sptr++; \
+       } \
+   }
+
+#elif NXGLIB_BITSPERPIXEL == 24
+#  define NXGL_MEMSET(dest,value,width) \
+   { \
+     FAR uybte *_ptr = (FAR ubyte*)dest; \
+     while (width--) \
+       { \
+         *_ptr++ = value; \
+         *_ptr++ = value >> 8; \
+         *_ptr++ = value >> 16; \
+       } \
+   }
+#  define NXGL_MEMCPY(dest,src,width) \
+   { \
+     FAR ubyte *_dptr = (FAR ubyte*)dest; \
+     FAR ubyte *_sptr = (FAR ubyte*)src; \
+     while (width--) \
+       { \
+         *_dptr++ = *_sptr++; \
+         *_dptr++ = *_sptr++; \
+         *_dptr++ = *_sptr++; \
+       } \
+   }
+#else
+#  define NXGL_MEMSET(dest,value,width) \
+   { \
+     FAR nx_pixel_t *_ptr = (FAR ubyte*)dest; \
+     while (width--) \
+       { \
+         *_ptr++ = value; \
+       } \
+   }
+#  define NXGL_MEMCPY(dest,src,width) \
+   { \
+     FAR nx_pixel_t *_dptr = (FAR ubyte*)dest; \
+     FAR nx_pixel_t *_sptr = (FAR ubyte*)src; \
+     while (width--) \
+       { \
+         *_dptr++ = *_sptr++; \
+       } \
+   }
+#endif
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __GRAPHICS_NXGLIB_NXGLIB_BITBLIT_H */