Re-usable tile get/put functions

2 files changed, 915 insertions, 0 deletions

diff --git a/src/mesa/pipe/util/p_tile.c b/src/mesa/pipe/util/p_tile.c
new file mode 100644
index 0000000000..8bc3c22c83
--- /dev/null
+++ b/src/mesa/pipe/util/p_tile.c
@@ -0,0 +1,834 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+/**
+ * RGBA/float tile get/put functions.
+ * Usable both by drivers and state trackers.
+ * Surfaces should already be in a mapped state.
+ */
+
+
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_inlines.h"
+
+#include "p_tile.h"
+
+
+
+/**
+ * Move raw block of pixels from surface to user memory.
+ * This should be usable by any hw driver that has mappable surfaces.
+ */
+void
+pipe_get_tile_raw(struct pipe_context *pipe,
+                  struct pipe_surface *ps,
+                  uint x, uint y, uint w, uint h,
+                  void *p, int dst_stride)
+{
+   const uint cpp = ps->cpp;
+   const ubyte *pSrc;
+   const uint src_stride = ps->pitch * cpp;
+   ubyte *pDest;
+   uint i;
+
+   assert(ps->map);
+
+   if (dst_stride == 0) {
+      dst_stride = w * cpp;
+   }
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   pSrc = ps->map + (y * ps->pitch + x) * cpp;
+   pDest = (ubyte *) p;
+
+   for (i = 0; i < h; i++) {
+      memcpy(pDest, pSrc, w * cpp);
+      pDest += dst_stride;
+      pSrc += src_stride;
+   }
+}
+
+
+/**
+ * Move raw block of pixels from user memory to surface.
+ * This should be usable by any hw driver that has mappable surfaces.
+ */
+void
+pipe_put_tile_raw(struct pipe_context *pipe,
+                  struct pipe_surface *ps,
+                  uint x, uint y, uint w, uint h,
+                  const void *p, int src_stride)
+{
+   const uint cpp = ps->cpp;
+   const ubyte *pSrc;
+   const uint dst_stride = ps->pitch * cpp;
+   ubyte *pDest;
+   uint i;
+
+   assert(ps->map);
+
+   if (src_stride == 0) {
+      src_stride = w * cpp;
+   }
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   pSrc = (const ubyte *) p;
+   pDest = ps->map + (y * ps->pitch + x) * cpp;
+
+   for (i = 0; i < h; i++) {
+      memcpy(pDest, pSrc, w * cpp);
+      pDest += dst_stride;
+      pSrc += src_stride;
+   }
+}
+
+
+
+
+/** Convert short in [-32768,32767] to GLfloat in [-1.0,1.0] */
+#define SHORT_TO_FLOAT(S)   ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
+
+#define UNCLAMPED_FLOAT_TO_SHORT(us, f)  \
+   us = ( (short) ( CLAMP((f), -1.0, 1.0) * 32767.0F) )
+
+
+
+/*** PIPE_FORMAT_A8R8G8B8_UNORM ***/
+
+static void
+a8r8g8b8_get_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       float *p)
+{
+   const unsigned *src
+      = ((const unsigned *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_A8R8G8B8_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         const unsigned pixel = src[j];
+         pRow[0] = UBYTE_TO_FLOAT((pixel >> 16) & 0xff);
+         pRow[1] = UBYTE_TO_FLOAT((pixel >>  8) & 0xff);
+         pRow[2] = UBYTE_TO_FLOAT((pixel >>  0) & 0xff);
+         pRow[3] = UBYTE_TO_FLOAT((pixel >> 24) & 0xff);
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+static void
+a8r8g8b8_put_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       const float *p)
+{
+   unsigned *dst
+      = ((unsigned *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_A8R8G8B8_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      const float *pRow = p;
+      for (j = 0; j < w; j++) {
+         unsigned r, g, b, a;
+         UNCLAMPED_FLOAT_TO_UBYTE(r, pRow[0]);
+         UNCLAMPED_FLOAT_TO_UBYTE(g, pRow[1]);
+         UNCLAMPED_FLOAT_TO_UBYTE(b, pRow[2]);
+         UNCLAMPED_FLOAT_TO_UBYTE(a, pRow[3]);
+         dst[j] = (a << 24) | (r << 16) | (g << 8) | b;
+         pRow += 4;
+      }
+      dst += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+/*** PIPE_FORMAT_B8G8R8A8_UNORM ***/
+
+static void
+b8g8r8a8_get_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       float *p)
+{
+   const unsigned *src
+      = ((const unsigned *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_B8G8R8A8_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         const unsigned pixel = src[j];
+         pRow[0] = UBYTE_TO_FLOAT((pixel >>  8) & 0xff);
+         pRow[1] = UBYTE_TO_FLOAT((pixel >> 16) & 0xff);
+         pRow[2] = UBYTE_TO_FLOAT((pixel >> 24) & 0xff);
+         pRow[3] = UBYTE_TO_FLOAT((pixel >>  0) & 0xff);
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+static void
+b8g8r8a8_put_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       const float *p)
+{
+   unsigned *dst
+      = ((unsigned *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_B8G8R8A8_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      const float *pRow = p;
+      for (j = 0; j < w; j++) {
+         unsigned r, g, b, a;
+         UNCLAMPED_FLOAT_TO_UBYTE(r, pRow[0]);
+         UNCLAMPED_FLOAT_TO_UBYTE(g, pRow[1]);
+         UNCLAMPED_FLOAT_TO_UBYTE(b, pRow[2]);
+         UNCLAMPED_FLOAT_TO_UBYTE(a, pRow[3]);
+         dst[j] = (b << 24) | (g << 16) | (r << 8) | a;
+         pRow += 4;
+      }
+      dst += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+/*** PIPE_FORMAT_A1R5G5B5_UNORM ***/
+
+static void
+a1r5g5b5_get_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       float *p)
+{
+   const ushort *src
+      = ((const ushort *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+
+   assert(ps->format == PIPE_FORMAT_A1R5G5B5_UNORM);
+
+   for (i = 0; i < h; i++) {
+      for (j = 0; j < w; j++) {
+         const ushort pixel = src[j];
+         p[0] = ((pixel >> 10) & 0x1f) * (1.0f / 31.0f);
+         p[1] = ((pixel >>  5) & 0x1f) * (1.0f / 31.0f);
+         p[2] = ((pixel      ) & 0x1f) * (1.0f / 31.0f);
+         p[3] = ((pixel >> 15)       ) * 1.0f;
+         p += 4;
+      }
+      src += ps->pitch;
+   }
+}
+
+
+/*** PIPE_FORMAT_A4R4G4B4_UNORM ***/
+
+static void
+a4r4g4b4_get_tile_rgba(struct pipe_surface *ps,
+                       unsigned x, unsigned y, unsigned w, unsigned h,
+                       float *p)
+{
+   const ushort *src
+      = ((const ushort *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+
+   assert(ps->format == PIPE_FORMAT_A4R4G4B4_UNORM);
+
+   for (i = 0; i < h; i++) {
+      for (j = 0; j < w; j++) {
+         const ushort pixel = src[j];
+         p[0] = ((pixel >>  8) & 0xf) * (1.0f / 15.0f);
+         p[1] = ((pixel >>  4) & 0xf) * (1.0f / 15.0f);
+         p[2] = ((pixel      ) & 0xf) * (1.0f / 15.0f);
+         p[3] = ((pixel >> 12)      ) * (1.0f / 15.0f);
+         p += 4;
+      }
+      src += ps->pitch;
+   }
+}
+
+
+/*** PIPE_FORMAT_R5G6B5_UNORM ***/
+
+static void
+r5g6b5_get_tile_rgba(struct pipe_surface *ps,
+                     unsigned x, unsigned y, unsigned w, unsigned h,
+                     float *p)
+{
+   const ushort *src
+      = ((const ushort *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+
+   assert(ps->format == PIPE_FORMAT_R5G6B5_UNORM);
+
+   for (i = 0; i < h; i++) {
+      for (j = 0; j < w; j++) {
+         const ushort pixel = src[j];
+         p[0] = ((pixel >> 11) & 0x1f) * (1.0f / 31.0f);
+         p[1] = ((pixel >>  5) & 0x3f) * (1.0f / 63.0f);
+         p[2] = ((pixel      ) & 0x1f) * (1.0f / 31.0f);
+         p[3] = 1.0f;
+         p += 4;
+      }
+      src += ps->pitch;
+   }
+}
+
+
+static void
+r5g5b5_put_tile_rgba(struct pipe_surface *ps,
+                     unsigned x, unsigned y, unsigned w, unsigned h,
+                     const float *p)
+{
+   ushort *dst
+      = ((ushort *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_R5G6B5_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      const float *pRow = p;
+      for (j = 0; j < w; j++) {
+         uint r = (uint) (CLAMP(pRow[0], 0.0, 1.0) * 31.0);
+         uint g = (uint) (CLAMP(pRow[1], 0.0, 1.0) * 63.0);
+         uint b = (uint) (CLAMP(pRow[2], 0.0, 1.0) * 31.0);
+         dst[j] = (r << 11) | (g << 5) | (b);
+         pRow += 4;
+      }
+      dst += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+
+/*** PIPE_FORMAT_Z16_UNORM ***/
+
+/**
+ * Return each Z value as four floats in [0,1].
+ */
+static void
+z16_get_tile_rgba(struct pipe_surface *ps,
+                  unsigned x, unsigned y, unsigned w, unsigned h,
+                  float *p)
+{
+   const ushort *src
+      = ((const ushort *) (ps->map))
+      + y * ps->pitch + x;
+   const float scale = 1.0f / 65535.0f;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_Z16_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[j * 4 + 0] =
+         pRow[j * 4 + 1] =
+         pRow[j * 4 + 2] =
+         pRow[j * 4 + 3] = src[j] * scale;
+      }
+      src += ps->pitch;
+      p += 4 * w0;
+   }
+}
+
+
+
+
+/*** PIPE_FORMAT_U_L8 ***/
+
+static void
+l8_get_tile_rgba(struct pipe_surface *ps,
+                 unsigned x, unsigned y, unsigned w, unsigned h,
+                 float *p)
+{
+   const ubyte *src
+      = ((const ubyte *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_U_L8);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[0] =
+         pRow[1] =
+         pRow[2] = UBYTE_TO_FLOAT(src[j]);
+         pRow[3] = 1.0;
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+/*** PIPE_FORMAT_U_A8 ***/
+
+static void
+a8_get_tile_rgba(struct pipe_surface *ps,
+                 unsigned x, unsigned y, unsigned w, unsigned h,
+                 float *p)
+{
+   const ubyte *src
+      = ((const ubyte *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_U_A8);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[0] =
+         pRow[1] =
+         pRow[2] = 0.0;
+         pRow[3] = UBYTE_TO_FLOAT(src[j]);
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+/*** PIPE_FORMAT_R16G16B16A16_SNORM ***/
+
+static void
+r16g16b16a16_get_tile_rgba(struct pipe_surface *ps,
+                           unsigned x, unsigned y, unsigned w, unsigned h,
+                           float *p)
+{
+   const short *src
+      = ((const short *) (ps->map))
+      + (y * ps->pitch + x) * 4;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_R16G16B16A16_SNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      const short *pixel = src;
+      for (j = 0; j < w; j++) {
+         pRow[0] = SHORT_TO_FLOAT(pixel[0]);
+         pRow[1] = SHORT_TO_FLOAT(pixel[1]);
+         pRow[2] = SHORT_TO_FLOAT(pixel[2]);
+         pRow[3] = SHORT_TO_FLOAT(pixel[3]);
+         pRow += 4;
+         pixel += 4;
+      }
+      src += ps->pitch * 4;
+      p += w0 * 4;
+   }
+}
+
+
+static void
+r16g16b16a16_put_tile_rgba(struct pipe_surface *ps,
+                           unsigned x, unsigned y, unsigned w, unsigned h,
+                           const float *p)
+{
+   short *dst
+      = ((short *) (ps->map))
+      + (y * ps->pitch + x) * 4;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_R16G16B16A16_SNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      const float *pRow = p;
+      for (j = 0; j < w; j++) {
+         short r, g, b, a;
+         UNCLAMPED_FLOAT_TO_SHORT(r, pRow[0]);
+         UNCLAMPED_FLOAT_TO_SHORT(g, pRow[1]);
+         UNCLAMPED_FLOAT_TO_SHORT(b, pRow[2]);
+         UNCLAMPED_FLOAT_TO_SHORT(a, pRow[3]);
+         dst[j*4+0] = r;
+         dst[j*4+1] = g;
+         dst[j*4+2] = b;
+         dst[j*4+3] = a;
+         pRow += 4;
+      }
+      dst += ps->pitch * 4;
+      p += w0 * 4;
+   }
+}
+
+
+
+/*** PIPE_FORMAT_U_I8 ***/
+
+static void
+i8_get_tile_rgba(struct pipe_surface *ps,
+                 unsigned x, unsigned y, unsigned w, unsigned h,
+                 float *p)
+{
+   const ubyte *src
+      = ((const ubyte *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_U_I8);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[0] =
+         pRow[1] =
+         pRow[2] =
+         pRow[3] = UBYTE_TO_FLOAT(src[j]);
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+/*** PIPE_FORMAT_U_A8_L8 ***/
+
+static void
+a8_l8_get_tile_rgba(struct pipe_surface *ps,
+                    unsigned x, unsigned y, unsigned w, unsigned h,
+                    float *p)
+{
+   const ushort *src
+      = ((const ushort *) (ps->map))
+      + y * ps->pitch + x;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_U_A8_L8);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         const ushort p = src[j];
+         pRow[0] =
+         pRow[1] =
+         pRow[2] = UBYTE_TO_FLOAT(p & 0xff);
+         pRow[3] = UBYTE_TO_FLOAT(p >> 8);
+         pRow += 4;
+      }
+      src += ps->pitch;
+      p += w0 * 4;
+   }
+}
+
+
+
+
+/*** PIPE_FORMAT_Z32_UNORM ***/
+
+/**
+ * Return each Z value as four floats in [0,1].
+ */
+static void
+z32_get_tile_rgba(struct pipe_surface *ps,
+                  unsigned x, unsigned y, unsigned w, unsigned h,
+                  float *p)
+{
+   const uint *src
+      = ((const uint *) (ps->map))
+      + y * ps->pitch + x;
+   const double scale = 1.0 / (double) 0xffffffff;
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_Z16_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[j * 4 + 0] =
+         pRow[j * 4 + 1] =
+         pRow[j * 4 + 2] =
+         pRow[j * 4 + 3] = (float) (scale * src[j]);
+      }
+      src += ps->pitch;
+      p += 4 * w0;
+   }
+}
+
+
+/*** PIPE_FORMAT_S8Z24_UNORM ***/
+
+/**
+ * Return Z component as four float in [0,1].  Stencil part ignored.
+ */
+static void
+s8z24_get_tile_rgba(struct pipe_surface *ps,
+                    unsigned x, unsigned y, unsigned w, unsigned h,
+                    float *p)
+{
+   const uint *src
+      = ((const uint *) (ps->map))
+      + y * ps->pitch + x;
+   const double scale = 1.0 / ((1 << 24) - 1);
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_S8Z24_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[j * 4 + 0] =
+         pRow[j * 4 + 1] =
+         pRow[j * 4 + 2] =
+         pRow[j * 4 + 3] = (float) (scale * (src[j] & 0xffffff));
+      }
+      src += ps->pitch;
+      p += 4 * w0;
+   }
+}
+
+
+/*** PIPE_FORMAT_Z24S8_UNORM ***/
+
+/**
+ * Return Z component as four float in [0,1].  Stencil part ignored.
+ */
+static void
+z24s8_get_tile_rgba(struct pipe_surface *ps,
+                    unsigned x, unsigned y, unsigned w, unsigned h,
+                    float *p)
+{
+   const uint *src
+      = ((const uint *) (ps->map))
+      + y * ps->pitch + x;
+   const double scale = 1.0 / ((1 << 24) - 1);
+   unsigned i, j;
+   unsigned w0 = w;
+
+   assert(ps->format == PIPE_FORMAT_Z24S8_UNORM);
+
+   if (pipe_clip_tile(x, y, &w, &h, ps))
+      return;
+
+   for (i = 0; i < h; i++) {
+      float *pRow = p;
+      for (j = 0; j < w; j++) {
+         pRow[j * 4 + 0] =
+         pRow[j * 4 + 1] =
+         pRow[j * 4 + 2] =
+         pRow[j * 4 + 3] = (float) (scale * (src[j] >> 8));
+      }
+      src += ps->pitch;
+      p += 4 * w0;
+   }
+}
+
+
+void
+pipe_get_tile_rgba(struct pipe_context *pipe,
+                   struct pipe_surface *ps,
+                   uint x, uint y, uint w, uint h,
+                   float *p)
+{
+   switch (ps->format) {
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+      a8r8g8b8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+      b8g8r8a8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_A1R5G5B5_UNORM:
+      a1r5g5b5_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_A4R4G4B4_UNORM:
+      a4r4g4b4_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_R5G6B5_UNORM:
+      r5g6b5_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_U_L8:
+      l8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_U_A8:
+      a8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_U_I8:
+      i8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_U_A8_L8:
+      a8_l8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_R16G16B16A16_SNORM:
+      r16g16b16a16_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_Z16_UNORM:
+      z16_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_Z32_UNORM:
+      z32_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_S8Z24_UNORM:
+      s8z24_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_Z24S8_UNORM:
+      z24s8_get_tile_rgba(ps, x, y, w, h, p);
+      break;
+   default:
+      assert(0);
+   }
+}
+
+
+void
+pipe_put_tile_rgba(struct pipe_context *pipe,
+                   struct pipe_surface *ps,
+                   uint x, uint y, uint w, uint h,
+                   const float *p)
+{
+   switch (ps->format) {
+   case PIPE_FORMAT_A8R8G8B8_UNORM:
+      a8r8g8b8_put_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_B8G8R8A8_UNORM:
+      b8g8r8a8_put_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_A1R5G5B5_UNORM:
+      /*a1r5g5b5_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_R5G6B5_UNORM:
+      r5g5b5_put_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_R8G8B8A8_UNORM:
+      break;
+   case PIPE_FORMAT_U_L8:
+      /*l8_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_U_A8:
+      /*a8_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_U_I8:
+      /*i8_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_U_A8_L8:
+      /*a8_l8_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_R16G16B16A16_SNORM:
+      r16g16b16a16_put_tile_rgba(ps, x, y, w, h, p);
+      break;
+   case PIPE_FORMAT_Z16_UNORM:
+      /*z16_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_Z32_UNORM:
+      /*z32_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_S8Z24_UNORM:
+      /*s8z24_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   case PIPE_FORMAT_Z24S8_UNORM:
+      /*z24s8_put_tile_rgba(ps, x, y, w, h, p);*/
+      break;
+   default:
+      assert(0);
+   }
+}
diff --git a/src/mesa/pipe/util/p_tile.h b/src/mesa/pipe/util/p_tile.h
new file mode 100644
index 0000000000..cd8124bf11
--- /dev/null
+++ b/src/mesa/pipe/util/p_tile.h
@@ -0,0 +1,81 @@
+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#ifndef P_TILE_H
+#define P_TILE_H
+
+#include "pipe/p_compiler.h"
+
+struct pipe_context;
+struct pipe_surface;
+
+
+/**
+ * Clip tile against surface dims.
+ * \return TRUE if tile is totally clipped, FALSE otherwise
+ */
+static INLINE boolean
+pipe_clip_tile(uint x, uint y, uint *w, uint *h, const struct pipe_surface *ps)
+{
+   if (x >= ps->width)
+      return TRUE;
+   if (y >= ps->height)
+      return TRUE;
+   if (x + *w > ps->width)
+      *w = ps->width - x;
+   if (y + *h > ps->height)
+      *h = ps->height - y;
+   return FALSE;
+}
+
+
+extern void
+pipe_get_tile_raw(struct pipe_context *pipe,
+                  struct pipe_surface *ps,
+                  uint x, uint y, uint w, uint h,
+                  void *p, int dst_stride);
+
+extern void
+pipe_put_tile_raw(struct pipe_context *pipe,
+                  struct pipe_surface *ps,
+                  uint x, uint y, uint w, uint h,
+                  const void *p, int src_stride);
+
+
+extern void
+pipe_get_tile_rgba(struct pipe_context *pipe,
+                   struct pipe_surface *ps,
+                   uint x, uint y, uint w, uint h,
+                   float *p);
+
+extern void
+pipe_put_tile_rgba(struct pipe_context *pipe,
+                   struct pipe_surface *ps,
+                   uint x, uint y, uint w, uint h,
+                   const float *p);
+
+#endif