-/* $Id: clip.c,v 1.15 2000/11/16 21:05:34 keithw Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.3
- *
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
- *
+ *
+ * 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
-#ifdef PC_HEADER
-#include "all.h"
-#else
#include "glheader.h"
#include "clip.h"
#include "context.h"
#include "macros.h"
-#include "mmath.h"
-#include "types.h"
+#include "mtypes.h"
-#include "math/m_xform.h"
#include "math/m_matrix.h"
-#endif
-
-
-
+/**
+ * Update derived clip plane state.
+ */
+void
+_mesa_update_clip_plane(struct gl_context *ctx, GLuint plane)
+{
+ if (_math_matrix_is_dirty(ctx->ProjectionMatrixStack.Top))
+ _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
-/**********************************************************************/
-/* Get/Set User clip-planes. */
-/**********************************************************************/
-
+ /* Clip-Space Plane = Eye-Space Plane * Projection Matrix */
+ _mesa_transform_vector(ctx->Transform._ClipUserPlane[plane],
+ ctx->Transform.EyeUserPlane[plane],
+ ctx->ProjectionMatrixStack.Top->inv);
+}
-void
+void GLAPIENTRY
_mesa_ClipPlane( GLenum plane, const GLdouble *eq )
{
GET_CURRENT_CONTEXT(ctx);
GLint p;
GLfloat equation[4];
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx, "glClipPlane");
p = (GLint) plane - (GLint) GL_CLIP_PLANE0;
- if (p<0 || p>=MAX_CLIP_PLANES) {
- gl_error( ctx, GL_INVALID_ENUM, "glClipPlane" );
+ if (p < 0 || p >= (GLint) ctx->Const.MaxClipPlanes) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glClipPlane" );
return;
}
- equation[0] = eq[0];
- equation[1] = eq[1];
- equation[2] = eq[2];
- equation[3] = eq[3];
+ equation[0] = (GLfloat) eq[0];
+ equation[1] = (GLfloat) eq[1];
+ equation[2] = (GLfloat) eq[2];
+ equation[3] = (GLfloat) eq[3];
/*
* The equation is transformed by the transpose of the inverse of the
* clipping now takes place. The clip-space equations are recalculated
* whenever the projection matrix changes.
*/
- if (ctx->ModelView.flags & MAT_DIRTY)
- _math_matrix_analyze( &ctx->ModelView );
+ if (_math_matrix_is_dirty(ctx->ModelviewMatrixStack.Top))
+ _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
- gl_transform_vector( ctx->Transform.EyeUserPlane[p], equation,
- ctx->ModelView.inv );
+ _mesa_transform_vector( equation, equation,
+ ctx->ModelviewMatrixStack.Top->inv );
+ if (TEST_EQ_4V(ctx->Transform.EyeUserPlane[p], equation))
+ return;
- /* Update derived state. This state also depends on the projection
- * matrix, and is recalculated on changes to the projection matrix by
- * code in gl_update_state().
- */
- if (ctx->Transform.ClipEnabled[p]) {
- if (ctx->ProjectionMatrix.flags & MAT_DIRTY)
- _math_matrix_analyze( &ctx->ProjectionMatrix );
-
- gl_transform_vector( ctx->Transform._ClipUserPlane[p],
- ctx->Transform.EyeUserPlane[p],
- ctx->ProjectionMatrix.inv );
+ /* EyeUserPlane is used by program state constants. */
+ FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
+ ctx->NewDriverState |= ctx->DriverFlags.NewClipPlane;
+ COPY_4FV(ctx->Transform.EyeUserPlane[p], equation);
+
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ _mesa_update_clip_plane(ctx, p);
}
- ctx->NewState |= _NEW_TRANSFORM;
+ if (ctx->Driver.ClipPlane)
+ ctx->Driver.ClipPlane( ctx, plane, equation );
}
-void
+void GLAPIENTRY
_mesa_GetClipPlane( GLenum plane, GLdouble *equation )
{
GET_CURRENT_CONTEXT(ctx);
GLint p;
- ASSERT_OUTSIDE_BEGIN_END(ctx, "glGetClipPlane");
-
-
p = (GLint) (plane - GL_CLIP_PLANE0);
- if (p<0 || p>=MAX_CLIP_PLANES) {
- gl_error( ctx, GL_INVALID_ENUM, "glGetClipPlane" );
+ if (p < 0 || p >= (GLint) ctx->Const.MaxClipPlanes) {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glGetClipPlane" );
return;
}
projects / mesa.git / blobdiff