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-rw-r--r--nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c327
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diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c
deleted file mode 100644
index 0af9cd8f2..000000000
--- a/nx-X11/extras/Mesa/src/mesa/swrast/s_fog.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version: 6.3
- *
- * Copyright (C) 1999-2005 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"),
- * 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
- * BRIAN PAUL 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.
- */
-
-
-#include "glheader.h"
-#include "colormac.h"
-#include "context.h"
-#include "macros.h"
-
-#include "s_context.h"
-#include "s_fog.h"
-#include "s_span.h"
-
-
-/**
- * Used to convert current raster distance to a fog factor in [0,1].
- */
-GLfloat
-_swrast_z_to_fogfactor(GLcontext *ctx, GLfloat z)
-{
- GLfloat d, f;
-
- switch (ctx->Fog.Mode) {
- case GL_LINEAR:
- if (ctx->Fog.Start == ctx->Fog.End)
- d = 1.0F;
- else
- d = 1.0F / (ctx->Fog.End - ctx->Fog.Start);
- f = (ctx->Fog.End - z) * d;
- return CLAMP(f, 0.0F, 1.0F);
- case GL_EXP:
- d = ctx->Fog.Density;
- f = (GLfloat) exp(-d * z);
- f = CLAMP(f, 0.0F, 1.0F);
- return f;
- case GL_EXP2:
- d = ctx->Fog.Density;
- f = (GLfloat) exp(-(d * d * z * z));
- f = CLAMP(f, 0.0F, 1.0F);
- return f;
- default:
- _mesa_problem(ctx, "Bad fog mode in _swrast_z_to_fogfactor");
- return 0.0;
- }
-}
-
-
-/**
- * Apply fog to a span of RGBA pixels.
- * The fog value are either in the span->array->fog array or interpolated from
- * the fog/fogStep values.
- * They fog values are either fog coordinates (Z) or fog blend factors.
- * _PreferPixelFog should be in sync with that state!
- */
-void
-_swrast_fog_rgba_span( const GLcontext *ctx, struct sw_span *span )
-{
- const SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const GLchan rFog = swrast->_FogColor[RCOMP];
- const GLchan gFog = swrast->_FogColor[GCOMP];
- const GLchan bFog = swrast->_FogColor[BCOMP];
- const GLuint haveW = (span->interpMask & SPAN_W);
- GLchan (*rgba)[4] = (GLchan (*)[4]) span->array->rgba;
-
- ASSERT(swrast->_FogEnabled);
- ASSERT((span->interpMask | span->arrayMask) & SPAN_FOG);
- ASSERT(span->arrayMask & SPAN_RGBA);
-
- /* NOTE: if haveW is true, that means the fog start/step values are
- * perspective-corrected and we have to divide each fog coord by W.
- */
-
- /* we need to compute fog blend factors */
- if (swrast->_PreferPixelFog) {
- /* The span's fog values are fog coordinates, now compute blend factors
- * and blend the fragment colors with the fog color.
- */
- switch (swrast->_FogMode) {
- case GL_LINEAR:
- {
- const GLfloat fogEnd = ctx->Fog.End;
- const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
- ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- GLfloat f, oneMinusF;
- f = (fogEnd - FABSF(fogCoord) / w) * fogScale;
- f = CLAMP(f, 0.0F, 1.0F);
- oneMinusF = 1.0F - f;
- rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
- rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
- rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- case GL_EXP:
- {
- const GLfloat density = -ctx->Fog.Density;
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- GLfloat f, oneMinusF;
- f = (GLfloat) exp(density * FABSF(fogCoord) / w);
- f = CLAMP(f, 0.0F, 1.0F);
- oneMinusF = 1.0F - f;
- rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
- rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
- rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- case GL_EXP2:
- {
- const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- const GLfloat coord = fogCoord / w;
- GLfloat tmp = negDensitySquared * coord * coord;
- GLfloat f, oneMinusF;
-#if defined(__alpha__) || defined(__alpha)
- /* XXX this underflow check may be needed for other systems*/
- if (tmp < FLT_MIN_10_EXP)
- tmp = FLT_MIN_10_EXP;
-#endif
- f = (GLfloat) exp(tmp);
- f = CLAMP(f, 0.0F, 1.0F);
- oneMinusF = 1.0F - f;
- rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
- rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
- rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- default:
- _mesa_problem(ctx, "Bad fog mode in _swrast_fog_rgba_span");
- return;
- }
- }
- else if (span->arrayMask & SPAN_FOG) {
- /* The span's fog array values are blend factors.
- * They were previously computed per-vertex.
- */
- GLuint i;
- for (i = 0; i < span->end; i++) {
- const GLfloat f = span->array->fog[i];
- const GLfloat oneMinusF = 1.0F - f;
- rgba[i][RCOMP] = (GLchan) (f * rgba[i][RCOMP] + oneMinusF * rFog);
- rgba[i][GCOMP] = (GLchan) (f * rgba[i][GCOMP] + oneMinusF * gFog);
- rgba[i][BCOMP] = (GLchan) (f * rgba[i][BCOMP] + oneMinusF * bFog);
- }
- }
- else {
- /* The span's fog start/step values are blend factors.
- * They were previously computed per-vertex.
- */
- const GLfloat fogStep = span->fogStep;
- GLfloat fog = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- ASSERT(span->interpMask & SPAN_FOG);
- for (i = 0; i < span->end; i++) {
- const GLfloat fact = fog / w;
- const GLfloat oneMinusF = 1.0F - fact;
- rgba[i][RCOMP] = (GLchan) (fact * rgba[i][RCOMP] + oneMinusF * rFog);
- rgba[i][GCOMP] = (GLchan) (fact * rgba[i][GCOMP] + oneMinusF * gFog);
- rgba[i][BCOMP] = (GLchan) (fact * rgba[i][BCOMP] + oneMinusF * bFog);
- fog += fogStep;
- w += wStep;
- }
- }
-}
-
-
-/**
- * As above, but color index mode.
- */
-void
-_swrast_fog_ci_span( const GLcontext *ctx, struct sw_span *span )
-{
- const SWcontext *swrast = SWRAST_CONTEXT(ctx);
- const GLuint haveW = (span->interpMask & SPAN_W);
- const GLuint fogIndex = (GLuint) ctx->Fog.Index;
- GLuint *index = span->array->index;
-
- ASSERT(swrast->_FogEnabled);
- ASSERT(span->arrayMask & SPAN_INDEX);
- ASSERT((span->interpMask | span->arrayMask) & SPAN_FOG);
-
- /* we need to compute fog blend factors */
- if (swrast->_PreferPixelFog) {
- /* The span's fog values are fog coordinates, now compute blend factors
- * and blend the fragment colors with the fog color.
- */
- switch (ctx->Fog.Mode) {
- case GL_LINEAR:
- {
- const GLfloat fogEnd = ctx->Fog.End;
- const GLfloat fogScale = (ctx->Fog.Start == ctx->Fog.End)
- ? 1.0F : 1.0F / (ctx->Fog.End - ctx->Fog.Start);
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- GLfloat f = (fogEnd - fogCoord / w) * fogScale;
- f = CLAMP(f, 0.0F, 1.0F);
- index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- case GL_EXP:
- {
- const GLfloat density = -ctx->Fog.Density;
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- GLfloat f = (GLfloat) exp(density * fogCoord / w);
- f = CLAMP(f, 0.0F, 1.0F);
- index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- case GL_EXP2:
- {
- const GLfloat negDensitySquared = -ctx->Fog.Density * ctx->Fog.Density;
- const GLfloat fogStep = span->fogStep;
- GLfloat fogCoord = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- for (i = 0; i < span->end; i++) {
- const GLfloat coord = fogCoord / w;
- GLfloat tmp = negDensitySquared * coord * coord;
- GLfloat f;
-#if defined(__alpha__) || defined(__alpha)
- /* XXX this underflow check may be needed for other systems*/
- if (tmp < FLT_MIN_10_EXP)
- tmp = FLT_MIN_10_EXP;
-#endif
- f = (GLfloat) exp(tmp);
- f = CLAMP(f, 0.0F, 1.0F);
- index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
- fogCoord += fogStep;
- w += wStep;
- }
- }
- break;
- default:
- _mesa_problem(ctx, "Bad fog mode in _swrast_fog_ci_span");
- return;
- }
- }
- else if (span->arrayMask & SPAN_FOG) {
- /* The span's fog array values are blend factors.
- * They were previously computed per-vertex.
- */
- GLuint i;
- for (i = 0; i < span->end; i++) {
- const GLfloat f = span->array->fog[i];
- index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
- }
- }
- else {
- /* The span's fog start/step values are blend factors.
- * They were previously computed per-vertex.
- */
- const GLfloat fogStep = span->fogStep;
- GLfloat fog = span->fog;
- const GLfloat wStep = haveW ? span->dwdx : 0.0F;
- GLfloat w = haveW ? span->w : 1.0F;
- GLuint i;
- ASSERT(span->interpMask & SPAN_FOG);
- for (i = 0; i < span->end; i++) {
- const GLfloat f = fog / w;
- index[i] = (GLuint) ((GLfloat) index[i] + (1.0F - f) * fogIndex);
- fog += fogStep;
- w += wStep;
- }
- }
-}
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