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

pixel.c is just the API-related code now.
tags/mesa_7_3_rc1
Brian Paul 17 years ago
parent
533c1dbe75
commit
18d2822905
4 changed files with 486 additions and 416 deletions
Unified View Show Diff Stats
  1. 421
    1
      src/mesa/main/image.c
  2. 46
    1
      src/mesa/main/image.h
  3. 11
    407
      src/mesa/main/pixel.c
  4. 8
    7
      src/mesa/main/pixel.h

+ 421
- 1
src/mesa/main/image.c View File

* Mesa 3-D graphics library * Mesa 3-D graphics library
* Version: 7.1 * 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 * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
} }




/**********************************************************************/
/***** 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 * Apply various pixel transfer operations to an array of RGBA pixels
* as indicated by the transferOps bitmask * as indicated by the transferOps bitmask

+ 46
- 1
src/mesa/main/image.h View File

* Mesa 3-D graphics library * Mesa 3-D graphics library
* Version: 7.1 * 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 * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
GLubyte *dest, const struct gl_pixelstore_attrib *packing ); GLubyte *dest, const struct gl_pixelstore_attrib *packing );




/** \name Pixel processing functions */
/*@{*/

extern 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);

extern void
_mesa_map_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4]);


extern void
_mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4]);


extern void
_mesa_lookup_rgba_float(const struct gl_color_table *table,
GLuint n, GLfloat rgba[][4]);

extern void
_mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
GLuint n, GLubyte rgba[][4]);


extern void
_mesa_map_ci_to_rgba(const GLcontext *ctx,
GLuint n, const GLuint index[], GLfloat rgba[][4]);


extern void
_mesa_map_ci8_to_rgba8(const GLcontext *ctx, GLuint n, const GLubyte index[],
GLubyte rgba[][4]);


extern void
_mesa_scale_and_bias_depth(const GLcontext *ctx, GLuint n,
GLfloat depthValues[]);

extern void
_mesa_scale_and_bias_depth_uint(const GLcontext *ctx, GLuint n,
GLuint depthValues[]);

extern void extern void
_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps, _mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
GLuint n, GLfloat rgba[][4]); GLuint n, GLfloat rgba[][4]);

+ 11
- 407
src/mesa/main/pixel.c View File

/* /*
* Mesa 3-D graphics library * Mesa 3-D graphics library
* Version: 6.5.3
* 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 * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/ */



/**
* \file pixel.c
* Pixel transfer functions (glPixelZoom, glPixelMap, glPixelTransfer)
*/

#include "glheader.h" #include "glheader.h"
#include "bufferobj.h" #include "bufferobj.h"
#include "colormac.h" #include "colormac.h"






/**********************************************************************/
/***** 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) / 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);
}
}



/**********************************************************************/ /**********************************************************************/
/***** State Management *****/ /***** State Management *****/
/**********************************************************************/ /**********************************************************************/
} }




/**
* Update meas pixel transfer derived state.
*/
void _mesa_update_pixel( GLcontext *ctx, GLuint new_state ) void _mesa_update_pixel( GLcontext *ctx, GLuint new_state )
{ {
if (new_state & _NEW_COLOR_MATRIX) if (new_state & _NEW_COLOR_MATRIX)

+ 8
- 7
src/mesa/main/pixel.h View File

/**
* \file pixel.h
* Pixel operations.
*/

/* /*
* Mesa 3-D graphics library * Mesa 3-D graphics library
* Version: 6.5.2
* Version: 7.1
* *
* Copyright (C) 1999-2006 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 * Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"), * copy of this software and associated documentation files (the "Software"),
*/ */




/**
* \file pixel.h
* Pixel operations.
*/


#ifndef PIXEL_H #ifndef PIXEL_H
#define PIXEL_H #define PIXEL_H



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