mesa: refactor: move pixel map/scale/bias code into image.c

pixel.c is just the API-related code now.

1 files changed, 421 insertions, 1 deletions

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 8034daecae..3b62eb34ed 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -2,7 +2,7 @@
  * Mesa 3-D graphics library
  * Version:  7.1
  *
- * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ * Copyright (C) 1999-2008  Brian Paul   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"),
@@ -1011,6 +1011,426 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
 }
 
 
+/**********************************************************************/
+/*****                  Pixel processing functions               ******/
+/**********************************************************************/
+
+/*
+ * 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 GLcontext *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 the color matrix and post color matrix scaling and biasing.
+ */
+void
+_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
+{
+   const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0];
+   const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0];
+   const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1];
+   const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1];
+   const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2];
+   const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2];
+   const GLfloat as = ctx->Pixel.PostColorMatrixScale[3];
+   const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3];
+   const GLfloat *m = ctx->ColorMatrixStack.Top->m;
+   GLuint i;
+   for (i = 0; i < n; i++) {
+      const GLfloat r = rgba[i][RCOMP];
+      const GLfloat g = rgba[i][GCOMP];
+      const GLfloat b = rgba[i][BCOMP];
+      const GLfloat a = rgba[i][ACOMP];
+      rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
+      rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
+      rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
+      rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
+   }
+}
+
+
+/**
+ * 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_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 GLcontext *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 GLcontext *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 GLcontext *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 GLcontext *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