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authorAlex Heck <nesl247@beryl-project.org>2007-03-17 19:55:09 -0400
committerAlex Heck <nesl247@beryl-project.org>2007-03-17 19:55:09 -0400
commit3c464a6f450c7b9e5f35460458e4d37a9be15f6e (patch)
treec98caeee9b16d98fee3db95977a713b25bb7919b /src/mesa/main/fog.c
parentd34c1c65bd18eaaae2d1da2a32654916477cb86f (diff)
downloadberyl-mesa-master.tar.gz
beryl-mesa-master.tar.bz2
Added missing filesHEADmaster
Diffstat (limited to 'src/mesa/main/fog.c')
-rw-r--r--src/mesa/main/fog.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/src/mesa/main/fog.c b/src/mesa/main/fog.c
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+++ b/src/mesa/main/fog.c
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+/*
+ * Mesa 3-D graphics library
+ * Version: 5.1
+ *
+ * Copyright (C) 1999-2003 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 "fog.h"
+#include "mtypes.h"
+
+
+
+void GLAPIENTRY
+_mesa_Fogf(GLenum pname, GLfloat param)
+{
+ _mesa_Fogfv(pname, &param);
+}
+
+
+void GLAPIENTRY
+_mesa_Fogi(GLenum pname, GLint param )
+{
+ GLfloat fparam = (GLfloat) param;
+ _mesa_Fogfv(pname, &fparam);
+}
+
+
+void GLAPIENTRY
+_mesa_Fogiv(GLenum pname, const GLint *params )
+{
+ GLfloat p[4];
+ switch (pname) {
+ case GL_FOG_MODE:
+ case GL_FOG_DENSITY:
+ case GL_FOG_START:
+ case GL_FOG_END:
+ case GL_FOG_INDEX:
+ case GL_FOG_COORDINATE_SOURCE_EXT:
+ p[0] = (GLfloat) *params;
+ break;
+ case GL_FOG_COLOR:
+ p[0] = INT_TO_FLOAT( params[0] );
+ p[1] = INT_TO_FLOAT( params[1] );
+ p[2] = INT_TO_FLOAT( params[2] );
+ p[3] = INT_TO_FLOAT( params[3] );
+ break;
+ default:
+ /* Error will be caught later in _mesa_Fogfv */
+ ;
+ }
+ _mesa_Fogfv(pname, p);
+}
+
+
+#define UPDATE_FOG_SCALE(ctx) do {\
+ if (ctx->Fog.End == ctx->Fog.Start)\
+ ctx->Fog._Scale = 1.0f;\
+ else\
+ ctx->Fog._Scale = 1.0f / (ctx->Fog.End - ctx->Fog.Start);\
+ } while(0)
+
+
+void GLAPIENTRY
+_mesa_Fogfv( GLenum pname, const GLfloat *params )
+{
+ GET_CURRENT_CONTEXT(ctx);
+ GLenum m;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ switch (pname) {
+ case GL_FOG_MODE:
+ m = (GLenum) (GLint) *params;
+ switch (m) {
+ case GL_LINEAR:
+ case GL_EXP:
+ case GL_EXP2:
+ break;
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
+ return;
+ }
+ if (ctx->Fog.Mode == m)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Mode = m;
+ break;
+ case GL_FOG_DENSITY:
+ if (*params<0.0) {
+ _mesa_error( ctx, GL_INVALID_VALUE, "glFog" );
+ return;
+ }
+ if (ctx->Fog.Density == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Density = *params;
+ break;
+ case GL_FOG_START:
+ if (ctx->Fog.Start == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Start = *params;
+ UPDATE_FOG_SCALE(ctx);
+ break;
+ case GL_FOG_END:
+ if (ctx->Fog.End == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.End = *params;
+ UPDATE_FOG_SCALE(ctx);
+ break;
+ case GL_FOG_INDEX:
+ if (ctx->Fog.Index == *params)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Index = *params;
+ break;
+ case GL_FOG_COLOR:
+ if (TEST_EQ_4V(ctx->Fog.Color, params))
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.Color[0] = CLAMP(params[0], 0.0F, 1.0F);
+ ctx->Fog.Color[1] = CLAMP(params[1], 0.0F, 1.0F);
+ ctx->Fog.Color[2] = CLAMP(params[2], 0.0F, 1.0F);
+ ctx->Fog.Color[3] = CLAMP(params[3], 0.0F, 1.0F);
+ break;
+ case GL_FOG_COORDINATE_SOURCE_EXT: {
+ GLenum p = (GLenum) (GLint) *params;
+ if (!ctx->Extensions.EXT_fog_coord ||
+ (p != GL_FOG_COORDINATE_EXT && p != GL_FRAGMENT_DEPTH_EXT)) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glFog");
+ return;
+ }
+ if (ctx->Fog.FogCoordinateSource == p)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_FOG);
+ ctx->Fog.FogCoordinateSource = p;
+ break;
+ }
+ default:
+ _mesa_error( ctx, GL_INVALID_ENUM, "glFog" );
+ return;
+ }
+
+ if (ctx->Driver.Fogfv) {
+ (*ctx->Driver.Fogfv)( ctx, pname, params );
+ }
+}
+
+
+/**********************************************************************/
+/***** Initialization *****/
+/**********************************************************************/
+
+void _mesa_init_fog( GLcontext * ctx )
+{
+ /* Fog group */
+ ctx->Fog.Enabled = GL_FALSE;
+ ctx->Fog.Mode = GL_EXP;
+ ASSIGN_4V( ctx->Fog.Color, 0.0, 0.0, 0.0, 0.0 );
+ ctx->Fog.Index = 0.0;
+ ctx->Fog.Density = 1.0;
+ ctx->Fog.Start = 0.0;
+ ctx->Fog.End = 1.0;
+ ctx->Fog.ColorSumEnabled = GL_FALSE;
+ ctx->Fog.FogCoordinateSource = GL_FRAGMENT_DEPTH_EXT;
+ ctx->Fog._Scale = 1.0f;
+}