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prototype implementation of GL_ARB_depth_texture, GL_ARB_shadow, GL_ARB_shadow_ambient

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This commit is contained in:
Brian Paul
2001-12-04 23:44:55 +00:00
parent 471a774f43
commit 014ec1ac5e
6 changed files with 267 additions and 72 deletions
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166
src/mesa/main/texstate.c
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@@ -1,4 +1,4 @@
/* $Id: texstate.c,v 1.59 2001/11/06 15:53:00 brianp Exp $ */
/* $Id: texstate.c,v 1.60 2001/12/04 23:44:56 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -42,6 +42,13 @@
#include "math/m_matrix.h"
#endif
/* TEMPORARY! */
#ifndef GL_TEXTURE_COMPARE_MODE_ARB
#define GL_TEXTURE_COMPARE_MODE_ARB 0x9990
#define GL_TEXTURE_COMPARE_FUNC_ARB 0x9991
#define GL_TEXTURE_COMPARE_RESULT_ARB 0x9992
#define GL_COMPARE_R_TO_TEXTURE_ARB 0x9993
#endif
#ifdef SPECIALCAST
@@ -967,12 +974,27 @@ _mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
_mesa_error( ctx, GL_INVALID_VALUE, "glTexParameter(param)" );
}
break;
case GL_TEXTURE_BORDER_COLOR:
#if 0 /* someday */
case GL_TEXTUER_BORDER_VALUES_NV:
/* don't clamp */
COPY_4V(texObj->BorderValues, params);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[0], params[0]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[1], params[1]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[2], params[2]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[3], params[3]);
break;
#endif
case GL_TEXTURE_BORDER_COLOR:
/* clamp */
texObj->BorderValues[0] = CLAMP(params[0], 0.0F, 1.0F);
texObj->BorderValues[1] = CLAMP(params[1], 0.0F, 1.0F);
texObj->BorderValues[2] = CLAMP(params[2], 0.0F, 1.0F);
texObj->BorderValues[3] = CLAMP(params[3], 0.0F, 1.0F);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[0], texObj->BorderValues[0]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[1], texObj->BorderValues[1]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[2], texObj->BorderValues[2]);
UNCLAMPED_FLOAT_TO_CHAN(texObj->BorderColor[3], texObj->BorderValues[3]);
break;
case GL_TEXTURE_MIN_LOD:
texObj->MinLod = params[0];
break;
@@ -1038,7 +1060,7 @@ _mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
return;
}
break;
case GL_SHADOW_AMBIENT_SGIX:
case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
if (ctx->Extensions.SGIX_shadow_ambient) {
UNCLAMPED_FLOAT_TO_CHAN(texObj->ShadowAmbient, params[0]);
}
@@ -1058,6 +1080,62 @@ _mesa_TexParameterfv( GLenum target, GLenum pname, const GLfloat *params )
return;
}
break;
case GL_TEXTURE_COMPARE_MODE_ARB:
if (ctx->Extensions.ARB_shadow) {
const GLenum mode = (GLenum) params[0];
if (mode == GL_LUMINANCE || mode == GL_COMPARE_R_TO_TEXTURE_ARB) {
texObj->CompareMode = params[0];
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(bad GL_TEXTURE_COMPARE_MODE_ARB)");
return;
}
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(pname=GL_TEXTURE_COMPARE_MODE_ARB)");
return;
}
break;
case GL_TEXTURE_COMPARE_FUNC_ARB:
if (ctx->Extensions.ARB_shadow) {
const GLenum func = (GLenum) params[0];
if (func == GL_LEQUAL || func == GL_GEQUAL) {
texObj->CompareFunc = params[0];
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(bad GL_TEXTURE_COMPARE_FUNC_ARB)");
return;
}
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(pname=GL_TEXTURE_COMPARE_FUNC_ARB)");
return;
}
break;
case GL_TEXTURE_COMPARE_RESULT_ARB:
if (ctx->Extensions.ARB_shadow) {
const GLenum result = (GLenum) params[0];
if (result == GL_LUMINANCE || result == GL_INTENSITY
|| result == GL_ALPHA) {
texObj->CompareResult = params[0];
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(bad GL_TEXTURE_COMPARE_RESULT_ARB)");
return;
}
}
else {
_mesa_error(ctx, GL_INVALID_ENUM,
"glTexParameter(pname=GL_TEXTURE_COMPARE_RESULT_ARB)");
return;
}
break;
default:
{
char s[100];
@@ -1321,7 +1399,17 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
case GL_TEXTURE_WRAP_R_EXT:
*params = ENUM_TO_FLOAT(obj->WrapR);
return;
#if 0 /* someday */
case GL_TEXTURE_BORDER_VALUES_NV:
/* unclamped */
params[0] = obj->BorderValues[0];
params[1] = obj->BorderValues[1];
params[2] = obj->BorderValues[2];
params[3] = obj->BorderValues[3];
return;
#endif
case GL_TEXTURE_BORDER_COLOR:
/* clamped */
params[0] = obj->BorderColor[0] / CHAN_MAXF;
params[1] = obj->BorderColor[1] / CHAN_MAXF;
params[2] = obj->BorderColor[2] / CHAN_MAXF;
@@ -1364,7 +1452,7 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
return;
}
break;
case GL_SHADOW_AMBIENT_SGIX:
case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
if (ctx->Extensions.SGIX_shadow_ambient) {
*params = CHAN_TO_FLOAT(obj->ShadowAmbient);
return;
@@ -1376,6 +1464,24 @@ _mesa_GetTexParameterfv( GLenum target, GLenum pname, GLfloat *params )
return;
}
break;
case GL_TEXTURE_COMPARE_MODE_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLfloat) obj->CompareMode;
return;
}
break;
case GL_TEXTURE_COMPARE_FUNC_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLfloat) obj->CompareFunc;
return;
}
break;
case GL_TEXTURE_COMPARE_RESULT_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLfloat) obj->CompareResult;
return;
}
break;
default:
; /* silence warnings */
}
@@ -1414,17 +1520,27 @@ _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
case GL_TEXTURE_WRAP_R_EXT:
*params = (GLint) obj->WrapR;
return;
#if 0 /* someday */
case GL_TEXTURE_BORDER_VALUES_NV:
/* unclamped */
params[0] = FLOAT_TO_INT(obj->BorderValues[0]);
params[1] = FLOAT_TO_INT(obj->BorderValues[1]);
params[2] = FLOAT_TO_INT(obj->BorderValues[2]);
params[3] = FLOAT_TO_INT(obj->BorderValues[3]);
return;
#endif
case GL_TEXTURE_BORDER_COLOR:
/* clamped */
{
GLfloat color[4];
color[0] = obj->BorderColor[0] / CHAN_MAXF;
color[1] = obj->BorderColor[1] / CHAN_MAXF;
color[2] = obj->BorderColor[2] / CHAN_MAXF;
color[3] = obj->BorderColor[3] / CHAN_MAXF;
params[0] = FLOAT_TO_INT( color[0] );
params[1] = FLOAT_TO_INT( color[1] );
params[2] = FLOAT_TO_INT( color[2] );
params[3] = FLOAT_TO_INT( color[3] );
GLfloat b[4];
b[0] = CLAMP(obj->BorderValues[0], 0.0F, 1.0F);
b[1] = CLAMP(obj->BorderValues[1], 0.0F, 1.0F);
b[2] = CLAMP(obj->BorderValues[2], 0.0F, 1.0F);
b[3] = CLAMP(obj->BorderValues[3], 0.0F, 1.0F);
params[0] = FLOAT_TO_INT(b[0]);
params[1] = FLOAT_TO_INT(b[1]);
params[2] = FLOAT_TO_INT(b[2]);
params[3] = FLOAT_TO_INT(b[3]);
}
return;
case GL_TEXTURE_RESIDENT:
@@ -1464,10 +1580,10 @@ _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
return;
}
break;
case GL_SHADOW_AMBIENT_SGIX:
case GL_SHADOW_AMBIENT_SGIX: /* aka GL_TEXTURE_COMPARE_FAIL_VALUE_ARB */
if (ctx->Extensions.SGIX_shadow_ambient) {
/* XXX range? */
*params = (GLint) CHAN_TO_FLOAT(obj->ShadowAmbient);
GLfloat a = CHAN_TO_FLOAT(obj->ShadowAmbient);
*params = (GLint) FLOAT_TO_INT(a);
return;
}
break;
@@ -1477,6 +1593,24 @@ _mesa_GetTexParameteriv( GLenum target, GLenum pname, GLint *params )
return;
}
break;
case GL_TEXTURE_COMPARE_MODE_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLint) obj->CompareMode;
return;
}
break;
case GL_TEXTURE_COMPARE_FUNC_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLint) obj->CompareFunc;
return;
}
break;
case GL_TEXTURE_COMPARE_RESULT_ARB:
if (ctx->Extensions.ARB_shadow) {
*params = (GLint) obj->CompareResult;
return;
}
break;
default:
; /* silence warnings */
}