-/* $Id: matrix.c,v 1.46 2003/03/01 01:50:21 brianp Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 5.1
+ * Version: 7.5
*
- * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
+ * Copyright (C) 2009 VMware, Inc. 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"),
*/
-/*
- * Matrix operations
+/**
+ * \file matrix.c
+ * Matrix operations.
*
- * NOTES:
- * 1. 4x4 transformation matrices are stored in memory in column major order.
- * 2. Points/vertices are to be thought of as column vectors.
- * 3. Transformation of a point p by a matrix M is: p' = M * p
+ * \note
+ * -# 4x4 transformation matrices are stored in memory in column major order.
+ * -# Points/vertices are to be thought of as column vectors.
+ * -# Transformation of a point p by a matrix M is: p' = M * p
*/
#include "glheader.h"
#include "imports.h"
-#include "buffers.h"
#include "context.h"
#include "enums.h"
#include "macros.h"
+#include "mfeatures.h"
#include "matrix.h"
#include "mtypes.h"
#include "math/m_matrix.h"
-
-void
+/**
+ * Apply a perspective projection matrix.
+ *
+ * \param left left clipping plane coordinate.
+ * \param right right clipping plane coordinate.
+ * \param bottom bottom clipping plane coordinate.
+ * \param top top clipping plane coordinate.
+ * \param nearval distance to the near clipping plane.
+ * \param farval distance to the far clipping plane.
+ *
+ * \sa glFrustum().
+ *
+ * Flushes vertices and validates parameters. Calls _math_matrix_frustum() with
+ * the top matrix of the current matrix stack and sets
+ * __struct gl_contextRec::NewState.
+ */
+void GLAPIENTRY
_mesa_Frustum( GLdouble left, GLdouble right,
GLdouble bottom, GLdouble top,
GLdouble nearval, GLdouble farval )
}
-void
+/**
+ * Apply an orthographic projection matrix.
+ *
+ * \param left left clipping plane coordinate.
+ * \param right right clipping plane coordinate.
+ * \param bottom bottom clipping plane coordinate.
+ * \param top top clipping plane coordinate.
+ * \param nearval distance to the near clipping plane.
+ * \param farval distance to the far clipping plane.
+ *
+ * \sa glOrtho().
+ *
+ * Flushes vertices and validates parameters. Calls _math_matrix_ortho() with
+ * the top matrix of the current matrix stack and sets
+ * __struct gl_contextRec::NewState.
+ */
+void GLAPIENTRY
_mesa_Ortho( GLdouble left, GLdouble right,
GLdouble bottom, GLdouble top,
GLdouble nearval, GLdouble farval )
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glFrustum(%f, %f, %f, %f, %f, %f)\n",
+ _mesa_debug(ctx, "glOrtho(%f, %f, %f, %f, %f, %f)\n",
left, right, bottom, top, nearval, farval);
if (left == right ||
}
-void
+/**
+ * Set the current matrix stack.
+ *
+ * \param mode matrix stack.
+ *
+ * \sa glMatrixMode().
+ *
+ * Flushes the vertices, validates the parameter and updates
+ * __struct gl_contextRec::CurrentStack and gl_transform_attrib::MatrixMode
+ * with the specified matrix stack.
+ */
+void GLAPIENTRY
_mesa_MatrixMode( GLenum mode )
{
GET_CURRENT_CONTEXT(ctx);
ctx->CurrentStack = &ctx->ProjectionMatrixStack;
break;
case GL_TEXTURE:
+ /* This error check is disabled because if we're called from
+ * glPopAttrib() when the active texture unit is >= MaxTextureCoordUnits
+ * we'll generate an unexpected error.
+ * From the GL_ARB_vertex_shader spec it sounds like we should instead
+ * do error checking in other places when we actually try to access
+ * texture matrices beyond MaxTextureCoordUnits.
+ */
+#if 0
+ if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) {
+ _mesa_error(ctx, GL_INVALID_OPERATION,
+ "glMatrixMode(invalid tex unit %d)",
+ ctx->Texture.CurrentUnit);
+ return;
+ }
+#endif
+ ASSERT(ctx->Texture.CurrentUnit < Elements(ctx->TextureMatrixStack));
ctx->CurrentStack = &ctx->TextureMatrixStack[ctx->Texture.CurrentUnit];
break;
- case GL_COLOR:
- ctx->CurrentStack = &ctx->ColorMatrixStack;
- break;
- case GL_MATRIX0_NV:
- case GL_MATRIX1_NV:
- case GL_MATRIX2_NV:
- case GL_MATRIX3_NV:
- case GL_MATRIX4_NV:
- case GL_MATRIX5_NV:
- case GL_MATRIX6_NV:
- case GL_MATRIX7_NV:
- if (!ctx->Extensions.NV_vertex_program) {
- _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode" );
+ case GL_MATRIX0_ARB:
+ case GL_MATRIX1_ARB:
+ case GL_MATRIX2_ARB:
+ case GL_MATRIX3_ARB:
+ case GL_MATRIX4_ARB:
+ case GL_MATRIX5_ARB:
+ case GL_MATRIX6_ARB:
+ case GL_MATRIX7_ARB:
+ if (ctx->API == API_OPENGL
+ && (ctx->Extensions.ARB_vertex_program ||
+ ctx->Extensions.ARB_fragment_program)) {
+ const GLuint m = mode - GL_MATRIX0_ARB;
+ if (m > ctx->Const.MaxProgramMatrices) {
+ _mesa_error(ctx, GL_INVALID_ENUM,
+ "glMatrixMode(GL_MATRIX%d_ARB)", m);
+ return;
+ }
+ ctx->CurrentStack = &ctx->ProgramMatrixStack[m];
+ }
+ else {
+ _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
return;
}
- ctx->CurrentStack = &ctx->ProgramMatrixStack[mode - GL_MATRIX0_NV];
break;
default:
- _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode" );
+ _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" );
return;
}
}
-
-void
+/**
+ * Push the current matrix stack.
+ *
+ * \sa glPushMatrix().
+ *
+ * Verifies the current matrix stack is not full, and duplicates the top-most
+ * matrix in the stack.
+ * Marks __struct gl_contextRec::NewState with the stack dirty flag.
+ */
+void GLAPIENTRY
_mesa_PushMatrix( void )
{
GET_CURRENT_CONTEXT(ctx);
- struct matrix_stack *stack = ctx->CurrentStack;
+ struct gl_matrix_stack *stack = ctx->CurrentStack;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
if (stack->Depth + 1 >= stack->MaxDepth) {
- _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushMatrix" );
+ if (ctx->Transform.MatrixMode == GL_TEXTURE) {
+ _mesa_error(ctx, GL_STACK_OVERFLOW,
+ "glPushMatrix(mode=GL_TEXTURE, unit=%d)",
+ ctx->Texture.CurrentUnit);
+ }
+ else {
+ _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushMatrix(mode=%s)",
+ _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
+ }
return;
}
_math_matrix_copy( &stack->Stack[stack->Depth + 1],
}
-
-void
+/**
+ * Pop the current matrix stack.
+ *
+ * \sa glPopMatrix().
+ *
+ * Flushes the vertices, verifies the current matrix stack is not empty, and
+ * moves the stack head down.
+ * Marks __struct gl_contextRec::NewState with the dirty stack flag.
+ */
+void GLAPIENTRY
_mesa_PopMatrix( void )
{
GET_CURRENT_CONTEXT(ctx);
- struct matrix_stack *stack = ctx->CurrentStack;
+ struct gl_matrix_stack *stack = ctx->CurrentStack;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (MESA_VERBOSE&VERBOSE_API)
_mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
if (stack->Depth == 0) {
- _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopMatrix" );
+ if (ctx->Transform.MatrixMode == GL_TEXTURE) {
+ _mesa_error(ctx, GL_STACK_UNDERFLOW,
+ "glPopMatrix(mode=GL_TEXTURE, unit=%d)",
+ ctx->Texture.CurrentUnit);
+ }
+ else {
+ _mesa_error(ctx, GL_STACK_UNDERFLOW, "glPopMatrix(mode=%s)",
+ _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode));
+ }
return;
}
stack->Depth--;
}
-
-void
+/**
+ * Replace the current matrix with the identity matrix.
+ *
+ * \sa glLoadIdentity().
+ *
+ * Flushes the vertices and calls _math_matrix_set_identity() with the
+ * top-most matrix in the current stack.
+ * Marks __struct gl_contextRec::NewState with the stack dirty flag.
+ */
+void GLAPIENTRY
_mesa_LoadIdentity( void )
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glLoadIdentity()");
+ _mesa_debug(ctx, "glLoadIdentity()\n");
_math_matrix_set_identity( ctx->CurrentStack->Top );
ctx->NewState |= ctx->CurrentStack->DirtyFlag;
}
-void
+/**
+ * Replace the current matrix with a given matrix.
+ *
+ * \param m matrix.
+ *
+ * \sa glLoadMatrixf().
+ *
+ * Flushes the vertices and calls _math_matrix_loadf() with the top-most
+ * matrix in the current stack and the given matrix.
+ * Marks __struct gl_contextRec::NewState with the dirty stack flag.
+ */
+void GLAPIENTRY
_mesa_LoadMatrixf( const GLfloat *m )
{
GET_CURRENT_CONTEXT(ctx);
}
-void
-_mesa_LoadMatrixd( const GLdouble *m )
-{
- GLint i;
- GLfloat f[16];
- if (!m) return;
- for (i = 0; i < 16; i++)
- f[i] = (GLfloat) m[i];
- _mesa_LoadMatrixf(f);
-}
-
-
-
-/*
- * Multiply the active matrix by an arbitary matrix.
+/**
+ * Multiply the current matrix with a given matrix.
+ *
+ * \param m matrix.
+ *
+ * \sa glMultMatrixf().
+ *
+ * Flushes the vertices and calls _math_matrix_mul_floats() with the top-most
+ * matrix in the current stack and the given matrix. Marks
+ * __struct gl_contextRec::NewState with the dirty stack flag.
*/
-void
+void GLAPIENTRY
_mesa_MultMatrixf( const GLfloat *m )
{
GET_CURRENT_CONTEXT(ctx);
}
-/*
- * Multiply the active matrix by an arbitary matrix.
- */
-void
-_mesa_MultMatrixd( const GLdouble *m )
-{
- GLint i;
- GLfloat f[16];
- if (!m) return;
- for (i = 0; i < 16; i++)
- f[i] = (GLfloat) m[i];
- _mesa_MultMatrixf( f );
-}
-
-
-
-
-/*
- * Execute a glRotate call
+/**
+ * Multiply the current matrix with a rotation matrix.
+ *
+ * \param angle angle of rotation, in degrees.
+ * \param x rotation vector x coordinate.
+ * \param y rotation vector y coordinate.
+ * \param z rotation vector z coordinate.
+ *
+ * \sa glRotatef().
+ *
+ * Flushes the vertices and calls _math_matrix_rotate() with the top-most
+ * matrix in the current stack and the given parameters. Marks
+ * __struct gl_contextRec::NewState with the dirty stack flag.
*/
-void
+void GLAPIENTRY
_mesa_Rotatef( GLfloat angle, GLfloat x, GLfloat y, GLfloat z )
{
GET_CURRENT_CONTEXT(ctx);
}
}
-void
-_mesa_Rotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z )
-{
- _mesa_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z);
-}
-
-/*
- * Execute a glScale call
+/**
+ * Multiply the current matrix with a general scaling matrix.
+ *
+ * \param x x axis scale factor.
+ * \param y y axis scale factor.
+ * \param z z axis scale factor.
+ *
+ * \sa glScalef().
+ *
+ * Flushes the vertices and calls _math_matrix_scale() with the top-most
+ * matrix in the current stack and the given parameters. Marks
+ * __struct gl_contextRec::NewState with the dirty stack flag.
*/
-void
+void GLAPIENTRY
_mesa_Scalef( GLfloat x, GLfloat y, GLfloat z )
{
GET_CURRENT_CONTEXT(ctx);
}
-void
-_mesa_Scaled( GLdouble x, GLdouble y, GLdouble z )
-{
- _mesa_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z);
-}
-
-
-/*
- * Execute a glTranslate call
+/**
+ * Multiply the current matrix with a translation matrix.
+ *
+ * \param x translation vector x coordinate.
+ * \param y translation vector y coordinate.
+ * \param z translation vector z coordinate.
+ *
+ * \sa glTranslatef().
+ *
+ * Flushes the vertices and calls _math_matrix_translate() with the top-most
+ * matrix in the current stack and the given parameters. Marks
+ * __struct gl_contextRec::NewState with the dirty stack flag.
*/
-void
+void GLAPIENTRY
_mesa_Translatef( GLfloat x, GLfloat y, GLfloat z )
{
GET_CURRENT_CONTEXT(ctx);
ctx->NewState |= ctx->CurrentStack->DirtyFlag;
}
+
+void GLAPIENTRY
+_mesa_LoadMatrixd( const GLdouble *m )
+{
+ GLint i;
+ GLfloat f[16];
+ if (!m) return;
+ for (i = 0; i < 16; i++)
+ f[i] = (GLfloat) m[i];
+ _mesa_LoadMatrixf(f);
+}
+
+void GLAPIENTRY
+_mesa_MultMatrixd( const GLdouble *m )
+{
+ GLint i;
+ GLfloat f[16];
+ if (!m) return;
+ for (i = 0; i < 16; i++)
+ f[i] = (GLfloat) m[i];
+ _mesa_MultMatrixf( f );
+}
+
+
+void GLAPIENTRY
+_mesa_Rotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z )
+{
+ _mesa_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z);
+}
+
-void
+void GLAPIENTRY
+_mesa_Scaled( GLdouble x, GLdouble y, GLdouble z )
+{
+ _mesa_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z);
+}
+
+
+void GLAPIENTRY
_mesa_Translated( GLdouble x, GLdouble y, GLdouble z )
{
_mesa_Translatef((GLfloat) x, (GLfloat) y, (GLfloat) z);
}
-void
-_mesa_LoadTransposeMatrixfARB( const GLfloat *m )
+void GLAPIENTRY
+_mesa_LoadTransposeMatrixf( const GLfloat *m )
{
GLfloat tm[16];
if (!m) return;
}
-void
-_mesa_LoadTransposeMatrixdARB( const GLdouble *m )
+void GLAPIENTRY
+_mesa_LoadTransposeMatrixd( const GLdouble *m )
{
GLfloat tm[16];
if (!m) return;
}
-void
-_mesa_MultTransposeMatrixfARB( const GLfloat *m )
+void GLAPIENTRY
+_mesa_MultTransposeMatrixf( const GLfloat *m )
{
GLfloat tm[16];
if (!m) return;
}
-void
-_mesa_MultTransposeMatrixdARB( const GLdouble *m )
+void GLAPIENTRY
+_mesa_MultTransposeMatrixd( const GLdouble *m )
{
GLfloat tm[16];
if (!m) return;
}
-/*
- * Called via glViewport or display list execution.
+
+/**********************************************************************/
+/** \name State management */
+/*@{*/
+
+
+/**
+ * Update the projection matrix stack.
+ *
+ * \param ctx GL context.
+ *
+ * Calls _math_matrix_analyse() with the top-matrix of the projection matrix
+ * stack, and recomputes user clip positions if necessary.
+ *
+ * \note This routine references __struct gl_contextRec::Tranform attribute
+ * values to compute userclip positions in clip space, but is only called on
+ * _NEW_PROJECTION. The _mesa_ClipPlane() function keeps these values up to
+ * date across changes to the __struct gl_contextRec::Transform attributes.
*/
-void
-_mesa_Viewport( GLint x, GLint y, GLsizei width, GLsizei height )
+static void
+update_projection( struct gl_context *ctx )
{
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
- _mesa_set_viewport(ctx, x, y, width, height);
+ _math_matrix_analyse( ctx->ProjectionMatrixStack.Top );
+
+ /* Recompute clip plane positions in clipspace. This is also done
+ * in _mesa_ClipPlane().
+ */
+ if (ctx->Transform.ClipPlanesEnabled) {
+ GLuint p;
+ for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ _mesa_transform_vector( ctx->Transform._ClipUserPlane[p],
+ ctx->Transform.EyeUserPlane[p],
+ ctx->ProjectionMatrixStack.Top->inv );
+ }
+ }
+ }
}
-/*
- * Define a new viewport and reallocate auxillary buffers if the size of
- * the window (color buffer) has changed.
+/**
+ * Calculate the combined modelview-projection matrix.
+ *
+ * \param ctx GL context.
+ *
+ * Multiplies the top matrices of the projection and model view stacks into
+ * __struct gl_contextRec::_ModelProjectMatrix via _math_matrix_mul_matrix()
+ * and analyzes the resulting matrix via _math_matrix_analyse().
*/
-void
-_mesa_set_viewport( GLcontext *ctx, GLint x, GLint y,
- GLsizei width, GLsizei height )
+static void
+calculate_model_project_matrix( struct gl_context *ctx )
{
- const GLfloat n = ctx->Viewport.Near;
- const GLfloat f = ctx->Viewport.Far;
+ _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix,
+ ctx->ProjectionMatrixStack.Top,
+ ctx->ModelviewMatrixStack.Top );
- if (MESA_VERBOSE & VERBOSE_API)
- _mesa_debug(ctx, "glViewport %d %d %d %d\n", x, y, width, height);
+ _math_matrix_analyse( &ctx->_ModelProjectMatrix );
+}
- if (width < 0 || height < 0) {
- _mesa_error( ctx, GL_INVALID_VALUE,
- "glViewport(%d, %d, %d, %d)", x, y, width, height );
- return;
+
+/**
+ * Updates the combined modelview-projection matrix.
+ *
+ * \param ctx GL context.
+ * \param new_state new state bit mask.
+ *
+ * If there is a new model view matrix then analyzes it. If there is a new
+ * projection matrix, updates it. Finally calls
+ * calculate_model_project_matrix() to recalculate the modelview-projection
+ * matrix.
+ */
+void _mesa_update_modelview_project( struct gl_context *ctx, GLuint new_state )
+{
+ if (new_state & _NEW_MODELVIEW) {
+ _math_matrix_analyse( ctx->ModelviewMatrixStack.Top );
+
+ /* Bring cull position up to date.
+ */
+ TRANSFORM_POINT3( ctx->Transform.CullObjPos,
+ ctx->ModelviewMatrixStack.Top->inv,
+ ctx->Transform.CullEyePos );
}
- /* clamp width, and height to implementation dependent range */
- width = CLAMP( width, 1, MAX_WIDTH );
- height = CLAMP( height, 1, MAX_HEIGHT );
- /* Save viewport */
- ctx->Viewport.X = x;
- ctx->Viewport.Width = width;
- ctx->Viewport.Y = y;
- ctx->Viewport.Height = height;
+ if (new_state & _NEW_PROJECTION)
+ update_projection( ctx );
- /* compute scale and bias values :: This is really driver-specific
- * and should be maintained elsewhere if at all.
+ /* Keep ModelviewProject up to date always to allow tnl
+ * implementations that go model->clip even when eye is required.
*/
- ctx->Viewport._WindowMap.m[MAT_SX] = (GLfloat) width / 2.0F;
- ctx->Viewport._WindowMap.m[MAT_TX] = ctx->Viewport._WindowMap.m[MAT_SX] + x;
- ctx->Viewport._WindowMap.m[MAT_SY] = (GLfloat) height / 2.0F;
- ctx->Viewport._WindowMap.m[MAT_TY] = ctx->Viewport._WindowMap.m[MAT_SY] + y;
- ctx->Viewport._WindowMap.m[MAT_SZ] = ctx->DepthMaxF * ((f - n) / 2.0F);
- ctx->Viewport._WindowMap.m[MAT_TZ] = ctx->DepthMaxF * ((f - n) / 2.0F + n);
- ctx->Viewport._WindowMap.flags = MAT_FLAG_GENERAL_SCALE|MAT_FLAG_TRANSLATION;
- ctx->Viewport._WindowMap.type = MATRIX_3D_NO_ROT;
- ctx->NewState |= _NEW_VIEWPORT;
-
- /* Check if window/buffer has been resized and if so, reallocate the
- * ancillary buffers.
- */
- _mesa_ResizeBuffersMESA();
+ calculate_model_project_matrix(ctx);
+}
+
+/*@}*/
+
+
+/**********************************************************************/
+/** Matrix stack initialization */
+/*@{*/
+
- if (ctx->Driver.Viewport) {
- (*ctx->Driver.Viewport)( ctx, x, y, width, height );
+/**
+ * Initialize a matrix stack.
+ *
+ * \param stack matrix stack.
+ * \param maxDepth maximum stack depth.
+ * \param dirtyFlag dirty flag.
+ *
+ * Allocates an array of \p maxDepth elements for the matrix stack and calls
+ * _math_matrix_ctr() for each element to initialize it.
+ */
+static void
+init_matrix_stack( struct gl_matrix_stack *stack,
+ GLuint maxDepth, GLuint dirtyFlag )
+{
+ GLuint i;
+
+ stack->Depth = 0;
+ stack->MaxDepth = maxDepth;
+ stack->DirtyFlag = dirtyFlag;
+ /* The stack */
+ stack->Stack = calloc(maxDepth, sizeof(GLmatrix));
+ for (i = 0; i < maxDepth; i++) {
+ _math_matrix_ctr(&stack->Stack[i]);
}
+ stack->Top = stack->Stack;
}
+/**
+ * Free matrix stack.
+ *
+ * \param stack matrix stack.
+ *
+ * Calls _math_matrix_dtr() for each element of the matrix stack and
+ * frees the array.
+ */
+static void
+free_matrix_stack( struct gl_matrix_stack *stack )
+{
+ GLuint i;
+ for (i = 0; i < stack->MaxDepth; i++) {
+ _math_matrix_dtr(&stack->Stack[i]);
+ }
+ free(stack->Stack);
+ stack->Stack = stack->Top = NULL;
+}
+
+/*@}*/
+
+
+/**********************************************************************/
+/** \name Initialization */
+/*@{*/
+
+
+/**
+ * Initialize the context matrix data.
+ *
+ * \param ctx GL context.
+ *
+ * Initializes each of the matrix stacks and the combined modelview-projection
+ * matrix.
+ */
+void _mesa_init_matrix( struct gl_context * ctx )
+{
+ GLint i;
+
+ /* Initialize matrix stacks */
+ init_matrix_stack(&ctx->ModelviewMatrixStack, MAX_MODELVIEW_STACK_DEPTH,
+ _NEW_MODELVIEW);
+ init_matrix_stack(&ctx->ProjectionMatrixStack, MAX_PROJECTION_STACK_DEPTH,
+ _NEW_PROJECTION);
+ for (i = 0; i < Elements(ctx->TextureMatrixStack); i++)
+ init_matrix_stack(&ctx->TextureMatrixStack[i], MAX_TEXTURE_STACK_DEPTH,
+ _NEW_TEXTURE_MATRIX);
+ for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++)
+ init_matrix_stack(&ctx->ProgramMatrixStack[i],
+ MAX_PROGRAM_MATRIX_STACK_DEPTH, _NEW_TRACK_MATRIX);
+ ctx->CurrentStack = &ctx->ModelviewMatrixStack;
+
+ /* Init combined Modelview*Projection matrix */
+ _math_matrix_ctr( &ctx->_ModelProjectMatrix );
+}
-void
-_mesa_DepthRange( GLclampd nearval, GLclampd farval )
+/**
+ * Free the context matrix data.
+ *
+ * \param ctx GL context.
+ *
+ * Frees each of the matrix stacks and the combined modelview-projection
+ * matrix.
+ */
+void _mesa_free_matrix_data( struct gl_context *ctx )
{
- /*
- * nearval - specifies mapping of the near clipping plane to window
- * coordinates, default is 0
- * farval - specifies mapping of the far clipping plane to window
- * coordinates, default is 1
- *
- * After clipping and div by w, z coords are in -1.0 to 1.0,
- * corresponding to near and far clipping planes. glDepthRange
- * specifies a linear mapping of the normalized z coords in
- * this range to window z coords.
- */
- GLfloat n, f;
- GET_CURRENT_CONTEXT(ctx);
- ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+ GLint i;
- if (MESA_VERBOSE&VERBOSE_API)
- _mesa_debug(ctx, "glDepthRange %f %f\n", nearval, farval);
+ free_matrix_stack(&ctx->ModelviewMatrixStack);
+ free_matrix_stack(&ctx->ProjectionMatrixStack);
+ for (i = 0; i < Elements(ctx->TextureMatrixStack); i++)
+ free_matrix_stack(&ctx->TextureMatrixStack[i]);
+ for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++)
+ free_matrix_stack(&ctx->ProgramMatrixStack[i]);
+ /* combined Modelview*Projection matrix */
+ _math_matrix_dtr( &ctx->_ModelProjectMatrix );
- n = (GLfloat) CLAMP( nearval, 0.0, 1.0 );
- f = (GLfloat) CLAMP( farval, 0.0, 1.0 );
+}
- ctx->Viewport.Near = n;
- ctx->Viewport.Far = f;
- ctx->Viewport._WindowMap.m[MAT_SZ] = ctx->DepthMaxF * ((f - n) / 2.0F);
- ctx->Viewport._WindowMap.m[MAT_TZ] = ctx->DepthMaxF * ((f - n) / 2.0F + n);
- ctx->NewState |= _NEW_VIEWPORT;
- if (ctx->Driver.DepthRange) {
- (*ctx->Driver.DepthRange)( ctx, nearval, farval );
+/**
+ * Initialize the context transform attribute group.
+ *
+ * \param ctx GL context.
+ *
+ * \todo Move this to a new file with other 'transform' routines.
+ */
+void _mesa_init_transform( struct gl_context *ctx )
+{
+ GLuint i;
+
+ /* Transformation group */
+ ctx->Transform.MatrixMode = GL_MODELVIEW;
+ ctx->Transform.Normalize = GL_FALSE;
+ ctx->Transform.RescaleNormals = GL_FALSE;
+ ctx->Transform.RasterPositionUnclipped = GL_FALSE;
+ for (i=0;i<ctx->Const.MaxClipPlanes;i++) {
+ ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 );
}
+ ctx->Transform.ClipPlanesEnabled = 0;
+
+ ASSIGN_4V( ctx->Transform.CullObjPos, 0.0, 0.0, 1.0, 0.0 );
+ ASSIGN_4V( ctx->Transform.CullEyePos, 0.0, 0.0, 1.0, 0.0 );
}
+
+
+/*@}*/
projects / mesa.git / blobdiff