mesa git update 8 sep 2011

1 files changed, 306 insertions, 567 deletions

diff --git a/mesalib/src/mesa/main/pixeltransfer.c b/mesalib/src/mesa/main/pixeltransfer.c
index 092ee3a14..5e881436a 100644
--- a/mesalib/src/mesa/main/pixeltransfer.c
+++ b/mesalib/src/mesa/main/pixeltransfer.c
@@ -1,567 +1,306 @@
-/*

- * Mesa 3-D graphics library

- *

- * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.

- * Copyright (C) 2009-2010  VMware, Inc.  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, sublicense,

- * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL

- * THE AUTHORS 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.

- */

-

-

-/**

- * \file pixeltransfer.c

- * Pixel transfer operations (scale, bias, table lookups, etc)

- */

-

-

-#include "glheader.h"

-#include "colormac.h"

-#include "pixeltransfer.h"

-#include "imports.h"

-#include "mtypes.h"

-

-

-/*

- * Apply scale and bias factors to an array of RGBA pixels.

- */

-void

-_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],

-                          GLfloat rScale, GLfloat gScale,

-                          GLfloat bScale, GLfloat aScale,

-                          GLfloat rBias, GLfloat gBias,

-                          GLfloat bBias, GLfloat aBias)

-{

-   if (rScale != 1.0 || rBias != 0.0) {

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;

-      }

-   }

-   if (gScale != 1.0 || gBias != 0.0) {

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;

-      }

-   }

-   if (bScale != 1.0 || bBias != 0.0) {

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;

-      }

-   }

-   if (aScale != 1.0 || aBias != 0.0) {

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;

-      }

-   }

-}

-

-

-/*

- * Apply pixel mapping to an array of floating point RGBA pixels.

- */

-void

-_mesa_map_rgba( const struct gl_context *ctx, GLuint n, GLfloat rgba[][4] )

-{

-   const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1);

-   const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);

-   const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);

-   const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);

-   const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;

-   const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;

-   const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;

-   const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;

-   GLuint i;

-   for (i=0;i<n;i++) {

-      GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);

-      GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);

-      GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);

-      GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);

-      rgba[i][RCOMP] = rMap[IROUND(r * rscale)];

-      rgba[i][GCOMP] = gMap[IROUND(g * gscale)];

-      rgba[i][BCOMP] = bMap[IROUND(b * bscale)];

-      rgba[i][ACOMP] = aMap[IROUND(a * ascale)];

-   }

-}

-

-/**

- * Apply a color table lookup to an array of floating point RGBA colors.

- */

-void

-_mesa_lookup_rgba_float(const struct gl_color_table *table,

-                        GLuint n, GLfloat rgba[][4])

-{

-   const GLint max = table->Size - 1;

-   const GLfloat scale = (GLfloat) max;

-   const GLfloat *lut = table->TableF;

-   GLuint i;

-

-   if (!table->TableF || table->Size == 0)

-      return;

-

-   switch (table->_BaseFormat) {

-      case GL_INTENSITY:

-         /* replace RGBA with I */

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND(rgba[i][RCOMP] * scale);

-            GLfloat c = lut[CLAMP(j, 0, max)];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] =

-            rgba[i][ACOMP] = c;

-         }

-         break;

-      case GL_LUMINANCE:

-         /* replace RGB with L */

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND(rgba[i][RCOMP] * scale);

-            GLfloat c = lut[CLAMP(j, 0, max)];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = c;

-         }

-         break;

-      case GL_ALPHA:

-         /* replace A with A */

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND(rgba[i][ACOMP] * scale);

-            rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];

-         }

-         break;

-      case GL_LUMINANCE_ALPHA:

-         /* replace RGBA with LLLA */

-         for (i = 0; i < n; i++) {

-            GLint jL = IROUND(rgba[i][RCOMP] * scale);

-            GLint jA = IROUND(rgba[i][ACOMP] * scale);

-            GLfloat luminance, alpha;

-            jL = CLAMP(jL, 0, max);

-            jA = CLAMP(jA, 0, max);

-            luminance = lut[jL * 2 + 0];

-            alpha     = lut[jA * 2 + 1];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = luminance;

-            rgba[i][ACOMP] = alpha;;

-         }

-         break;

-      case GL_RED:

-         /* replace RGB with RGB */

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND(rgba[i][RCOMP] * scale);

-            jR = CLAMP(jR, 0, max);

-            rgba[i][RCOMP] = lut[jR * 3 + 0];

-         }

-         break;

-      case GL_RG:

-         /* replace RG with RG */

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND(rgba[i][RCOMP] * scale);

-            GLint jG = IROUND(rgba[i][GCOMP] * scale);

-            jR = CLAMP(jR, 0, max);

-            jG = CLAMP(jG, 0, max);

-            rgba[i][RCOMP] = lut[jR * 3 + 0];

-            rgba[i][GCOMP] = lut[jG * 3 + 1];

-         }

-         break;

-      case GL_RGB:

-         /* replace RGB with RGB */

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND(rgba[i][RCOMP] * scale);

-            GLint jG = IROUND(rgba[i][GCOMP] * scale);

-            GLint jB = IROUND(rgba[i][BCOMP] * scale);

-            jR = CLAMP(jR, 0, max);

-            jG = CLAMP(jG, 0, max);

-            jB = CLAMP(jB, 0, max);

-            rgba[i][RCOMP] = lut[jR * 3 + 0];

-            rgba[i][GCOMP] = lut[jG * 3 + 1];

-            rgba[i][BCOMP] = lut[jB * 3 + 2];

-         }

-         break;

-      case GL_RGBA:

-         /* replace RGBA with RGBA */

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND(rgba[i][RCOMP] * scale);

-            GLint jG = IROUND(rgba[i][GCOMP] * scale);

-            GLint jB = IROUND(rgba[i][BCOMP] * scale);

-            GLint jA = IROUND(rgba[i][ACOMP] * scale);

-            jR = CLAMP(jR, 0, max);

-            jG = CLAMP(jG, 0, max);

-            jB = CLAMP(jB, 0, max);

-            jA = CLAMP(jA, 0, max);

-            rgba[i][RCOMP] = lut[jR * 4 + 0];

-            rgba[i][GCOMP] = lut[jG * 4 + 1];

-            rgba[i][BCOMP] = lut[jB * 4 + 2];

-            rgba[i][ACOMP] = lut[jA * 4 + 3];

-         }

-         break;

-      default:

-         _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");

-         return;

-   }

-}

-

-

-

-/**

- * Apply a color table lookup to an array of ubyte/RGBA colors.

- */

-void

-_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,

-                        GLuint n, GLubyte rgba[][4])

-{

-   const GLubyte *lut = table->TableUB;

-   const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;

-   GLuint i;

-

-   if (!table->TableUB || table->Size == 0)

-      return;

-

-   switch (table->_BaseFormat) {

-   case GL_INTENSITY:

-      /* replace RGBA with I */

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            const GLubyte c = lut[rgba[i][RCOMP]];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] =

-            rgba[i][ACOMP] = c;

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] =

-            rgba[i][ACOMP] = lut[j];

-         }

-      }

-      break;

-   case GL_LUMINANCE:

-      /* replace RGB with L */

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            const GLubyte c = lut[rgba[i][RCOMP]];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = c;

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = lut[j];

-         }

-      }

-      break;

-   case GL_ALPHA:

-      /* replace A with A */

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            rgba[i][ACOMP] = lut[rgba[i][ACOMP]];

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);

-            rgba[i][ACOMP] = lut[j];

-         }

-      }

-      break;

-   case GL_LUMINANCE_ALPHA:

-      /* replace RGBA with LLLA */

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];

-            GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = l;

-            rgba[i][ACOMP] = a;

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);

-            GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);

-            GLubyte luminance = lut[jL * 2 + 0];

-            GLubyte alpha     = lut[jA * 2 + 1];

-            rgba[i][RCOMP] =

-            rgba[i][GCOMP] =

-            rgba[i][BCOMP] = luminance;

-            rgba[i][ACOMP] = alpha;

-         }

-      }

-      break;

-   case GL_RGB:

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];

-            rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];

-            rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);

-            GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);

-            GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);

-            rgba[i][RCOMP] = lut[jR * 3 + 0];

-            rgba[i][GCOMP] = lut[jG * 3 + 1];

-            rgba[i][BCOMP] = lut[jB * 3 + 2];

-         }

-      }

-      break;

-   case GL_RGBA:

-      if (table->Size == 256) {

-         for (i = 0; i < n; i++) {

-            rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];

-            rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];

-            rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];

-            rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);

-            GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);

-            GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);

-            GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);

-            CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);

-            CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);

-            CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);

-            CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);

-         }

-      }

-      break;

-   default:

-      _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");

-      return;

-   }

-}

-

-

-

-/*

- * Map color indexes to float rgba values.

- */

-void

-_mesa_map_ci_to_rgba( const struct gl_context *ctx, GLuint n,

-                      const GLuint index[], GLfloat rgba[][4] )

-{

-   GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;

-   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;

-   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;

-   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;

-   const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;

-   const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;

-   const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;

-   const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;

-   GLuint i;

-   for (i=0;i<n;i++) {

-      rgba[i][RCOMP] = rMap[index[i] & rmask];

-      rgba[i][GCOMP] = gMap[index[i] & gmask];

-      rgba[i][BCOMP] = bMap[index[i] & bmask];

-      rgba[i][ACOMP] = aMap[index[i] & amask];

-   }

-}

-

-

-/**

- * Map ubyte color indexes to ubyte/RGBA values.

- */

-void

-_mesa_map_ci8_to_rgba8(const struct gl_context *ctx,

-                       GLuint n, const GLubyte index[],

-                       GLubyte rgba[][4])

-{

-   GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;

-   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;

-   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;

-   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;

-   const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;

-   const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;

-   const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;

-   const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;

-   GLuint i;

-   for (i=0;i<n;i++) {

-      rgba[i][RCOMP] = rMap[index[i] & rmask];

-      rgba[i][GCOMP] = gMap[index[i] & gmask];

-      rgba[i][BCOMP] = bMap[index[i] & bmask];

-      rgba[i][ACOMP] = aMap[index[i] & amask];

-   }

-}

-

-

-void

-_mesa_scale_and_bias_depth(const struct gl_context *ctx, GLuint n,

-                           GLfloat depthValues[])

-{

-   const GLfloat scale = ctx->Pixel.DepthScale;

-   const GLfloat bias = ctx->Pixel.DepthBias;

-   GLuint i;

-   for (i = 0; i < n; i++) {

-      GLfloat d = depthValues[i] * scale + bias;

-      depthValues[i] = CLAMP(d, 0.0F, 1.0F);

-   }

-}

-

-

-void

-_mesa_scale_and_bias_depth_uint(const struct gl_context *ctx, GLuint n,

-                                GLuint depthValues[])

-{

-   const GLdouble max = (double) 0xffffffff;

-   const GLdouble scale = ctx->Pixel.DepthScale;

-   const GLdouble bias = ctx->Pixel.DepthBias * max;

-   GLuint i;

-   for (i = 0; i < n; i++) {

-      GLdouble d = (GLdouble) depthValues[i] * scale + bias;

-      d = CLAMP(d, 0.0, max);

-      depthValues[i] = (GLuint) d;

-   }

-}

-

-/**

- * Apply various pixel transfer operations to an array of RGBA pixels

- * as indicated by the transferOps bitmask

- */

-void

-_mesa_apply_rgba_transfer_ops(struct gl_context *ctx, GLbitfield transferOps,

-                              GLuint n, GLfloat rgba[][4])

-{

-   /* scale & bias */

-   if (transferOps & IMAGE_SCALE_BIAS_BIT) {

-      _mesa_scale_and_bias_rgba(n, rgba,

-                                ctx->Pixel.RedScale, ctx->Pixel.GreenScale,

-                                ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,

-                                ctx->Pixel.RedBias, ctx->Pixel.GreenBias,

-                                ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);

-   }

-   /* color map lookup */

-   if (transferOps & IMAGE_MAP_COLOR_BIT) {

-      _mesa_map_rgba( ctx, n, rgba );

-   }

-

-   /* clamping to [0,1] */

-   if (transferOps & IMAGE_CLAMP_BIT) {

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);

-         rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);

-         rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);

-         rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);

-      }

-   }

-}

-

-

-/*

- * Apply color index shift and offset to an array of pixels.

- */

-void

-_mesa_shift_and_offset_ci(const struct gl_context *ctx,

-                          GLuint n, GLuint indexes[])

-{

-   GLint shift = ctx->Pixel.IndexShift;

-   GLint offset = ctx->Pixel.IndexOffset;

-   GLuint i;

-   if (shift > 0) {

-      for (i=0;i<n;i++) {

-         indexes[i] = (indexes[i] << shift) + offset;

-      }

-   }

-   else if (shift < 0) {

-      shift = -shift;

-      for (i=0;i<n;i++) {

-         indexes[i] = (indexes[i] >> shift) + offset;

-      }

-   }

-   else {

-      for (i=0;i<n;i++) {

-         indexes[i] = indexes[i] + offset;

-      }

-   }

-}

-

-

-

-/**

- * Apply color index shift, offset and table lookup to an array

- * of color indexes;

- */

-void

-_mesa_apply_ci_transfer_ops(const struct gl_context *ctx,

-                            GLbitfield transferOps,

-                            GLuint n, GLuint indexes[])

-{

-   if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {

-      _mesa_shift_and_offset_ci(ctx, n, indexes);

-   }

-   if (transferOps & IMAGE_MAP_COLOR_BIT) {

-      const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         const GLuint j = indexes[i] & mask;

-         indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);

-      }

-   }

-}

-

-

-/**

- * Apply stencil index shift, offset and table lookup to an array

- * of stencil values.

- */

-void

-_mesa_apply_stencil_transfer_ops(const struct gl_context *ctx, GLuint n,

-                                 GLstencil stencil[])

-{

-   if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {

-      const GLint offset = ctx->Pixel.IndexOffset;

-      GLint shift = ctx->Pixel.IndexShift;

-      GLuint i;

-      if (shift > 0) {

-         for (i = 0; i < n; i++) {

-            stencil[i] = (stencil[i] << shift) + offset;

-         }

-      }

-      else if (shift < 0) {

-         shift = -shift;

-         for (i = 0; i < n; i++) {

-            stencil[i] = (stencil[i] >> shift) + offset;

-         }

-      }

-      else {

-         for (i = 0; i < n; i++) {

-            stencil[i] = stencil[i] + offset;

-         }

-      }

-   }

-   if (ctx->Pixel.MapStencilFlag) {

-      GLuint mask = ctx->PixelMaps.StoS.Size - 1;

-      GLuint i;

-      for (i = 0; i < n; i++) {

-         stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];

-      }

-   }

-}

+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (C) 2009-2010  VMware, Inc.  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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS 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.
+ */
+
+
+/**
+ * \file pixeltransfer.c
+ * Pixel transfer operations (scale, bias, table lookups, etc)
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+#include "pixeltransfer.h"
+#include "imports.h"
+#include "mtypes.h"
+
+
+/*
+ * Apply scale and bias factors to an array of RGBA pixels.
+ */
+void
+_mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],
+                          GLfloat rScale, GLfloat gScale,
+                          GLfloat bScale, GLfloat aScale,
+                          GLfloat rBias, GLfloat gBias,
+                          GLfloat bBias, GLfloat aBias)
+{
+   if (rScale != 1.0 || rBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;
+      }
+   }
+   if (gScale != 1.0 || gBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;
+      }
+   }
+   if (bScale != 1.0 || bBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;
+      }
+   }
+   if (aScale != 1.0 || aBias != 0.0) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;
+      }
+   }
+}
+
+
+/*
+ * Apply pixel mapping to an array of floating point RGBA pixels.
+ */
+void
+_mesa_map_rgba( const struct gl_context *ctx, GLuint n, GLfloat rgba[][4] )
+{
+   const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1);
+   const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);
+   const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);
+   const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);
+   const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;
+   const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;
+   const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;
+   const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+      GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+      GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+      GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+      rgba[i][RCOMP] = rMap[IROUND(r * rscale)];
+      rgba[i][GCOMP] = gMap[IROUND(g * gscale)];
+      rgba[i][BCOMP] = bMap[IROUND(b * bscale)];
+      rgba[i][ACOMP] = aMap[IROUND(a * ascale)];
+   }
+}
+
+/*
+ * Map color indexes to float rgba values.
+ */
+void
+_mesa_map_ci_to_rgba( const struct gl_context *ctx, GLuint n,
+                      const GLuint index[], GLfloat rgba[][4] )
+{
+   GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
+   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
+   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
+   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
+   const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;
+   const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;
+   const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;
+   const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      rgba[i][RCOMP] = rMap[index[i] & rmask];
+      rgba[i][GCOMP] = gMap[index[i] & gmask];
+      rgba[i][BCOMP] = bMap[index[i] & bmask];
+      rgba[i][ACOMP] = aMap[index[i] & amask];
+   }
+}
+
+
+/**
+ * Map ubyte color indexes to ubyte/RGBA values.
+ */
+void
+_mesa_map_ci8_to_rgba8(const struct gl_context *ctx,
+                       GLuint n, const GLubyte index[],
+                       GLubyte rgba[][4])
+{
+   GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
+   GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
+   GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
+   GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
+   const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;
+   const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;
+   const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;
+   const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;
+   GLuint i;
+   for (i=0;i<n;i++) {
+      rgba[i][RCOMP] = rMap[index[i] & rmask];
+      rgba[i][GCOMP] = gMap[index[i] & gmask];
+      rgba[i][BCOMP] = bMap[index[i] & bmask];
+      rgba[i][ACOMP] = aMap[index[i] & amask];
+   }
+}
+
+
+void
+_mesa_scale_and_bias_depth(const struct gl_context *ctx, GLuint n,
+                           GLfloat depthValues[])
+{
+   const GLfloat scale = ctx->Pixel.DepthScale;
+   const GLfloat bias = ctx->Pixel.DepthBias;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLfloat d = depthValues[i] * scale + bias;
+      depthValues[i] = CLAMP(d, 0.0F, 1.0F);
+   }
+}
+
+
+void
+_mesa_scale_and_bias_depth_uint(const struct gl_context *ctx, GLuint n,
+                                GLuint depthValues[])
+{
+   const GLdouble max = (double) 0xffffffff;
+   const GLdouble scale = ctx->Pixel.DepthScale;
+   const GLdouble bias = ctx->Pixel.DepthBias * max;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      GLdouble d = (GLdouble) depthValues[i] * scale + bias;
+      d = CLAMP(d, 0.0, max);
+      depthValues[i] = (GLuint) d;
+   }
+}
+
+/**
+ * Apply various pixel transfer operations to an array of RGBA pixels
+ * as indicated by the transferOps bitmask
+ */
+void
+_mesa_apply_rgba_transfer_ops(struct gl_context *ctx, GLbitfield transferOps,
+                              GLuint n, GLfloat rgba[][4])
+{
+   /* scale & bias */
+   if (transferOps & IMAGE_SCALE_BIAS_BIT) {
+      _mesa_scale_and_bias_rgba(n, rgba,
+                                ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
+                                ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
+                                ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
+                                ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
+   }
+   /* color map lookup */
+   if (transferOps & IMAGE_MAP_COLOR_BIT) {
+      _mesa_map_rgba( ctx, n, rgba );
+   }
+
+   /* clamping to [0,1] */
+   if (transferOps & IMAGE_CLAMP_BIT) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
+         rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
+         rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
+         rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
+      }
+   }
+}
+
+
+/*
+ * Apply color index shift and offset to an array of pixels.
+ */
+void
+_mesa_shift_and_offset_ci(const struct gl_context *ctx,
+                          GLuint n, GLuint indexes[])
+{
+   GLint shift = ctx->Pixel.IndexShift;
+   GLint offset = ctx->Pixel.IndexOffset;
+   GLuint i;
+   if (shift > 0) {
+      for (i=0;i<n;i++) {
+         indexes[i] = (indexes[i] << shift) + offset;
+      }
+   }
+   else if (shift < 0) {
+      shift = -shift;
+      for (i=0;i<n;i++) {
+         indexes[i] = (indexes[i] >> shift) + offset;
+      }
+   }
+   else {
+      for (i=0;i<n;i++) {
+         indexes[i] = indexes[i] + offset;
+      }
+   }
+}
+
+
+
+/**
+ * Apply color index shift, offset and table lookup to an array
+ * of color indexes;
+ */
+void
+_mesa_apply_ci_transfer_ops(const struct gl_context *ctx,
+                            GLbitfield transferOps,
+                            GLuint n, GLuint indexes[])
+{
+   if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
+      _mesa_shift_and_offset_ci(ctx, n, indexes);
+   }
+   if (transferOps & IMAGE_MAP_COLOR_BIT) {
+      const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         const GLuint j = indexes[i] & mask;
+         indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
+      }
+   }
+}
+
+
+/**
+ * Apply stencil index shift, offset and table lookup to an array
+ * of stencil values.
+ */
+void
+_mesa_apply_stencil_transfer_ops(const struct gl_context *ctx, GLuint n,
+                                 GLstencil stencil[])
+{
+   if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
+      const GLint offset = ctx->Pixel.IndexOffset;
+      GLint shift = ctx->Pixel.IndexShift;
+      GLuint i;
+      if (shift > 0) {
+         for (i = 0; i < n; i++) {
+            stencil[i] = (stencil[i] << shift) + offset;
+         }
+      }
+      else if (shift < 0) {
+         shift = -shift;
+         for (i = 0; i < n; i++) {
+            stencil[i] = (stencil[i] >> shift) + offset;
+         }
+      }
+      else {
+         for (i = 0; i < n; i++) {
+            stencil[i] = stencil[i] + offset;
+         }
+      }
+   }
+   if (ctx->Pixel.MapStencilFlag) {
+      GLuint mask = ctx->PixelMaps.StoS.Size - 1;
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
+      }
+   }
+}