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-rw-r--r--src/mesa/main/pixel.c250
1 files changed, 122 insertions, 128 deletions
diff --git a/src/mesa/main/pixel.c b/src/mesa/main/pixel.c
index 213aa2c8944..b3b5f672948 100644
--- a/src/mesa/main/pixel.c
+++ b/src/mesa/main/pixel.c
@@ -1,10 +1,10 @@
-/* $Id: pixel.c,v 1.6 2000/04/08 18:57:45 brianp Exp $ */
+/* $Id: pixel.c,v 1.7 2000/04/12 18:54:48 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2000 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"),
@@ -25,11 +25,6 @@
*/
-/*
- * glPixelStore, glPixelTransfer, glPixelMap, glPixelZoom, etc.
- */
-
-
#ifdef PC_HEADER
#include "all.h"
#else
@@ -625,62 +620,16 @@ _mesa_PixelTransferi( GLenum pname, GLint param )
-
-/*
- * Pixel processing functions
- */
-
-
-/*
- * Apply scale and bias factors to an array of RGBA pixels.
- */
-void gl_scale_and_bias_color( const GLcontext *ctx, GLuint n,
- GLfloat red[], GLfloat green[],
- GLfloat blue[], GLfloat alpha[] )
-{
- GLuint i;
- for (i=0;i<n;i++) {
- GLfloat r = red[i] * ctx->Pixel.RedScale + ctx->Pixel.RedBias;
- GLfloat g = green[i] * ctx->Pixel.GreenScale + ctx->Pixel.GreenBias;
- GLfloat b = blue[i] * ctx->Pixel.BlueScale + ctx->Pixel.BlueBias;
- GLfloat a = alpha[i] * ctx->Pixel.AlphaScale + ctx->Pixel.AlphaBias;
- red[i] = CLAMP( r, 0.0F, 1.0F );
- green[i] = CLAMP( g, 0.0F, 1.0F );
- blue[i] = CLAMP( b, 0.0F, 1.0F );
- alpha[i] = CLAMP( a, 0.0F, 1.0F );
- }
-}
-
-
-/*
- * Apply scale and bias factors to an array of RGBA pixels.
- */
-void gl_scale_and_bias_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
-{
- GLfloat rbias = ctx->Pixel.RedBias * 255.0F;
- GLfloat gbias = ctx->Pixel.GreenBias * 255.0F;
- GLfloat bbias = ctx->Pixel.BlueBias * 255.0F;
- GLfloat abias = ctx->Pixel.AlphaBias * 255.0F;
- GLuint i;
- for (i=0;i<n;i++) {
- GLint r = (GLint) (rgba[i][RCOMP] * ctx->Pixel.RedScale + rbias);
- GLint g = (GLint) (rgba[i][GCOMP] * ctx->Pixel.GreenScale + gbias);
- GLint b = (GLint) (rgba[i][BCOMP] * ctx->Pixel.BlueScale + bbias);
- GLint a = (GLint) (rgba[i][ACOMP] * ctx->Pixel.AlphaScale + abias);
- rgba[i][RCOMP] = CLAMP( r, 0, 255 );
- rgba[i][GCOMP] = CLAMP( g, 0, 255 );
- rgba[i][BCOMP] = CLAMP( b, 0, 255 );
- rgba[i][ACOMP] = CLAMP( a, 0, 255 );
- }
-}
+/**********************************************************************/
+/***** Pixel processing functions ******/
+/**********************************************************************/
/*
* Apply scale and bias factors to an array of RGBA pixels.
*/
void
-_mesa_scale_and_bias_rgba_float(const GLcontext *ctx, GLuint n,
- GLfloat rgba[][4])
+_mesa_scale_and_bias_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
{
if (ctx->Pixel.RedScale != 1.0 || ctx->Pixel.RedBias != 0.0) {
const GLfloat scale = ctx->Pixel.RedScale;
@@ -718,33 +667,10 @@ _mesa_scale_and_bias_rgba_float(const GLcontext *ctx, GLuint n,
/*
- * Apply pixel mapping to an array of RGBA pixels.
- */
-void gl_map_rgba( const GLcontext *ctx, GLuint n, GLubyte rgba[][4] )
-{
- GLfloat rscale = (ctx->Pixel.MapRtoRsize - 1) / 255.0F;
- GLfloat gscale = (ctx->Pixel.MapGtoGsize - 1) / 255.0F;
- GLfloat bscale = (ctx->Pixel.MapBtoBsize - 1) / 255.0F;
- GLfloat ascale = (ctx->Pixel.MapAtoAsize - 1) / 255.0F;
- GLuint i;
- for (i=0;i<n;i++) {
- GLint ir = (GLint) (rgba[i][RCOMP] * rscale);
- GLint ig = (GLint) (rgba[i][GCOMP] * gscale);
- GLint ib = (GLint) (rgba[i][BCOMP] * bscale);
- GLint ia = (GLint) (rgba[i][ACOMP] * ascale);
- rgba[i][RCOMP] = (GLint) (ctx->Pixel.MapRtoR[ir] * 255.0F);
- rgba[i][GCOMP] = (GLint) (ctx->Pixel.MapGtoG[ig] * 255.0F);
- rgba[i][BCOMP] = (GLint) (ctx->Pixel.MapBtoB[ib] * 255.0F);
- rgba[i][ACOMP] = (GLint) (ctx->Pixel.MapAtoA[ia] * 255.0F);
- }
-}
-
-
-/*
* Apply pixel mapping to an array of floating point RGBA pixels.
*/
void
-_mesa_map_rgba_float( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
+_mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
{
const GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
const GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
@@ -793,24 +719,106 @@ _mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
}
-
/*
- * Apply pixel mapping to an array of RGBA pixels.
+ * Apply a color table lookup to an array of colors.
*/
-void gl_map_color( const GLcontext *ctx, GLuint n,
- GLfloat red[], GLfloat green[],
- GLfloat blue[], GLfloat alpha[] )
+void
+_mesa_lookup_rgba(const struct gl_color_table *table,
+ GLuint n, GLfloat rgba[][4])
{
- GLfloat rscale = ctx->Pixel.MapRtoRsize - 1;
- GLfloat gscale = ctx->Pixel.MapGtoGsize - 1;
- GLfloat bscale = ctx->Pixel.MapBtoBsize - 1;
- GLfloat ascale = ctx->Pixel.MapAtoAsize - 1;
- GLuint i;
- for (i=0;i<n;i++) {
- red[i] = ctx->Pixel.MapRtoR[ (GLint) (red[i] * rscale + 0.5F) ];
- green[i] = ctx->Pixel.MapGtoG[ (GLint) (green[i] * gscale + 0.5F) ];
- blue[i] = ctx->Pixel.MapBtoB[ (GLint) (blue[i] * bscale + 0.5F) ];
- alpha[i] = ctx->Pixel.MapAtoA[ (GLint) (alpha[i] * ascale + 0.5F) ];
+ switch (table->Format) {
+ case GL_INTENSITY:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace RGBA with I */
+ for (i = 0; i < n; i++) {
+ GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
+ GLubyte c = lut[j];
+ rgba[i][RCOMP] = rgba[i][GCOMP] =
+ rgba[i][BCOMP] = rgba[i][ACOMP] = c;
+ }
+ }
+ break;
+ case GL_LUMINANCE:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace RGB with L */
+ for (i = 0; i < n; i++) {
+ GLint j = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
+ GLubyte c = lut[j];
+ rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c;
+ }
+ }
+ break;
+ case GL_ALPHA:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace A with A */
+ for (i = 0; i < n; i++) {
+ GLint j = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
+ rgba[i][ACOMP] = lut[j];
+ }
+ }
+ break;
+ case GL_LUMINANCE_ALPHA:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace RGBA with LLLA */
+ for (i = 0; i < n; i++) {
+ GLint jL = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
+ GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
+ 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:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace RGB with RGB */
+ for (i = 0; i < n; i++) {
+ GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
+ GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F);
+ GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F);
+ 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:
+ {
+ const GLfloat scale = (GLfloat) (table->Size - 1);
+ const GLubyte *lut = table->Table;
+ GLuint i;
+ /* replace RGBA with RGBA */
+ for (i = 0; i < n; i++) {
+ GLint jR = (GLint) (rgba[i][RCOMP] * scale + 0.5F);
+ GLint jG = (GLint) (rgba[i][GCOMP] * scale + 0.5F);
+ GLint jB = (GLint) (rgba[i][BCOMP] * scale + 0.5F);
+ GLint jA = (GLint) (rgba[i][ACOMP] * scale + 0.5F);
+ 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:
+ gl_problem(NULL, "Bad format in _mesa_lookup_rgba");
+ return;
}
}
@@ -819,7 +827,8 @@ void gl_map_color( const GLcontext *ctx, GLuint n,
/*
* Apply color index shift and offset to an array of pixels.
*/
-void gl_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
+void
+_mesa_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
{
GLint shift = ctx->Pixel.IndexShift;
GLint offset = ctx->Pixel.IndexOffset;
@@ -846,7 +855,8 @@ void gl_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
/*
* Apply color index mapping to color indexes.
*/
-void gl_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
+void
+_mesa_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
{
GLuint mask = ctx->Pixel.MapItoIsize - 1;
GLuint i;
@@ -859,8 +869,9 @@ void gl_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] )
/*
* Map color indexes to rgba values.
*/
-void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
- GLubyte rgba[][4] )
+void
+_mesa_map_ci_to_rgba_ubyte( const GLcontext *ctx, GLuint n,
+ const GLuint index[], GLubyte rgba[][4] )
{
GLuint rmask = ctx->Pixel.MapItoRsize - 1;
GLuint gmask = ctx->Pixel.MapItoGsize - 1;
@@ -883,8 +894,9 @@ void gl_map_ci_to_rgba( const GLcontext *ctx, GLuint n, const GLuint index[],
/*
* Map color indexes to float rgba values.
*/
-void gl_map_ci_to_rgba_float( const GLcontext *ctx, GLuint n, const GLuint index[],
- GLfloat rgba[][4] )
+void
+_mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n,
+ const GLuint index[], GLfloat rgba[][4] )
{
GLuint rmask = ctx->Pixel.MapItoRsize - 1;
GLuint gmask = ctx->Pixel.MapItoGsize - 1;
@@ -907,8 +919,9 @@ void gl_map_ci_to_rgba_float( const GLcontext *ctx, GLuint n, const GLuint index
/*
* Map 8-bit color indexes to rgb values.
*/
-void gl_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
- GLubyte rgba[][4] )
+void
+_mesa_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
+ GLubyte rgba[][4] )
{
GLuint rmask = ctx->Pixel.MapItoRsize - 1;
GLuint gmask = ctx->Pixel.MapItoGsize - 1;
@@ -928,27 +941,9 @@ void gl_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[],
}
-void gl_map_ci_to_color( const GLcontext *ctx, GLuint n, const GLuint index[],
- GLfloat r[], GLfloat g[],
- GLfloat b[], GLfloat a[] )
-{
- GLuint rmask = ctx->Pixel.MapItoRsize - 1;
- GLuint gmask = ctx->Pixel.MapItoGsize - 1;
- GLuint bmask = ctx->Pixel.MapItoBsize - 1;
- GLuint amask = ctx->Pixel.MapItoAsize - 1;
- GLuint i;
- for (i=0;i<n;i++) {
- r[i] = ctx->Pixel.MapItoR[index[i] & rmask];
- g[i] = ctx->Pixel.MapItoG[index[i] & gmask];
- b[i] = ctx->Pixel.MapItoB[index[i] & bmask];
- a[i] = ctx->Pixel.MapItoA[index[i] & amask];
- }
-}
-
-
-
-void gl_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
- GLstencil stencil[] )
+void
+_mesa_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
+ GLstencil stencil[] )
{
GLuint i;
GLint shift = ctx->Pixel.IndexShift;
@@ -973,8 +968,8 @@ void gl_shift_and_offset_stencil( const GLcontext *ctx, GLuint n,
}
-
-void gl_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
+void
+_mesa_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
{
GLuint mask = ctx->Pixel.MapStoSsize - 1;
GLuint i;
@@ -982,4 +977,3 @@ void gl_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] )
stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ];
}
}
-
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