+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 7.3
- *
- * Copyright (C) 1999-2008 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.
- */
-
-
-/**
- * \file state.c
- * State management.
- *
- * This file manages recalculation of derived values in struct gl_context.
- */
-
-#include <precomp.h>
-
-
-/**
- * Helper for update_arrays().
- * \return min(current min, array->_MaxElement).
- */
-static GLuint
-update_min(GLuint min, struct gl_client_array *array)
-{
- _mesa_update_array_max_element(array);
- return MIN2(min, array->_MaxElement);
-}
-
-
-/**
- * Update ctx->Array._MaxElement (the max legal index into all enabled arrays).
- * Need to do this upon new array state or new buffer object state.
- */
-static void
-update_arrays( struct gl_context *ctx )
-{
- GLuint min = ~0;
-
- /* find min of _MaxElement values for all enabled arrays.
- * Note that the generic arrays always take precedence over
- * the legacy arrays.
- */
-
- /* 0 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_POS].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_POS]);
- }
-
- /* 2 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_NORMAL]);
- }
-
- /* 3 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR]);
- }
-
- /* 5 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_FOG]);
- }
-
- /* 6 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_COLOR_INDEX]);
- }
-
- /* 8 */
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_TEX].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_TEX]);
- }
-
- if (ctx->Array.VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
- min = update_min(min, &ctx->Array.VertexAttrib[VERT_ATTRIB_EDGEFLAG]);
- }
-
- /* _MaxElement is one past the last legal array element */
- ctx->Array._MaxElement = min;
-}
-
-static void
-update_viewport_matrix(struct gl_context *ctx)
-{
- const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
-
- ASSERT(depthMax > 0);
-
- /* Compute scale and bias values. This is really driver-specific
- * and should be maintained elsewhere if at all.
- * NOTE: RasterPos uses this.
- */
- _math_matrix_viewport(&ctx->Viewport._WindowMap,
- ctx->Viewport.X, ctx->Viewport.Y,
- ctx->Viewport.Width, ctx->Viewport.Height,
- ctx->Viewport.Near, ctx->Viewport.Far,
- depthMax);
-}
-
-
-/*
- * Check polygon state and set DD_TRI_CULL_FRONT_BACK and/or DD_TRI_OFFSET
- * in ctx->_TriangleCaps if needed.
- */
-static void
-update_polygon(struct gl_context *ctx)
-{
- ctx->_TriangleCaps &= ~(DD_TRI_CULL_FRONT_BACK | DD_TRI_OFFSET);
-
- if (ctx->Polygon.CullFlag && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
- ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
-
- if ( ctx->Polygon.OffsetPoint
- || ctx->Polygon.OffsetLine
- || ctx->Polygon.OffsetFill)
- ctx->_TriangleCaps |= DD_TRI_OFFSET;
-}
-
-
-/**
- * Update the ctx->_TriangleCaps bitfield.
- * XXX that bitfield should really go away someday!
- * This function must be called after other update_*() functions since
- * there are dependencies on some other derived values.
- */
-#if 0
-static void
-update_tricaps(struct gl_context *ctx, GLbitfield new_state)
-{
- ctx->_TriangleCaps = 0;
-
- /*
- * Points
- */
- if (1/*new_state & _NEW_POINT*/) {
- if (ctx->Point.SmoothFlag)
- ctx->_TriangleCaps |= DD_POINT_SMOOTH;
- if (ctx->Point._Attenuated)
- ctx->_TriangleCaps |= DD_POINT_ATTEN;
- }
-
- /*
- * Lines
- */
- if (1/*new_state & _NEW_LINE*/) {
- if (ctx->Line.SmoothFlag)
- ctx->_TriangleCaps |= DD_LINE_SMOOTH;
- if (ctx->Line.StippleFlag)
- ctx->_TriangleCaps |= DD_LINE_STIPPLE;
- }
-
- /*
- * Polygons
- */
- if (1/*new_state & _NEW_POLYGON*/) {
- if (ctx->Polygon.SmoothFlag)
- ctx->_TriangleCaps |= DD_TRI_SMOOTH;
- if (ctx->Polygon.StippleFlag)
- ctx->_TriangleCaps |= DD_TRI_STIPPLE;
- if (ctx->Polygon.FrontMode != GL_FILL
- || ctx->Polygon.BackMode != GL_FILL)
- ctx->_TriangleCaps |= DD_TRI_UNFILLED;
- if (ctx->Polygon.CullFlag
- && ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
- ctx->_TriangleCaps |= DD_TRI_CULL_FRONT_BACK;
- if (ctx->Polygon.OffsetPoint ||
- ctx->Polygon.OffsetLine ||
- ctx->Polygon.OffsetFill)
- ctx->_TriangleCaps |= DD_TRI_OFFSET;
- }
-
- /*
- * Lighting and shading
- */
- if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
- ctx->_TriangleCaps |= DD_TRI_LIGHT_TWOSIDE;
- if (ctx->Light.ShadeModel == GL_FLAT)
- ctx->_TriangleCaps |= DD_FLATSHADE;
- if (_mesa_need_secondary_color(ctx))
- ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
-}
-#endif
-
-
-/**
- * Compute derived GL state.
- * If __struct gl_contextRec::NewState is non-zero then this function \b must
- * be called before rendering anything.
- *
- * Calls dd_function_table::UpdateState to perform any internal state
- * management necessary.
- *
- * \sa _mesa_update_modelview_project(), _mesa_update_texture(),
- * _mesa_update_buffer_bounds(),
- * _mesa_update_lighting() and _mesa_update_tnl_spaces().
- */
-void
-_mesa_update_state_locked( struct gl_context *ctx )
-{
- GLbitfield new_state = ctx->NewState;
-
- if (new_state == _NEW_CURRENT_ATTRIB)
- goto out;
-
- /*
- * Now update derived state info
- */
-
- if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
- _mesa_update_modelview_project( ctx, new_state );
-
- if (new_state & (_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
- _mesa_update_texture( ctx, new_state );
-
- if (new_state & _NEW_BUFFERS)
- _mesa_update_framebuffer(ctx);
-
- if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
- _mesa_update_draw_buffer_bounds( ctx );
-
- if (new_state & _NEW_POLYGON)
- update_polygon( ctx );
-
- if (new_state & _NEW_LIGHT)
- _mesa_update_lighting( ctx );
-
- if (new_state & (_NEW_STENCIL | _NEW_BUFFERS))
- _mesa_update_stencil( ctx );
-
- if (new_state & _NEW_PIXEL)
- _mesa_update_pixel( ctx, new_state );
-
- if (new_state & (_NEW_BUFFERS | _NEW_VIEWPORT))
- update_viewport_matrix(ctx);
-
-#if 0
- if (new_state & (_NEW_POINT | _NEW_LINE | _NEW_POLYGON | _NEW_LIGHT
- | _NEW_STENCIL | _DD_NEW_SEPARATE_SPECULAR))
- update_tricaps( ctx, new_state );
-#endif
-
- /* ctx->_NeedEyeCoords is now up to date.
- *
- * If the truth value of this variable has changed, update for the
- * new lighting space and recompute the positions of lights and the
- * normal transform.
- *
- * If the lighting space hasn't changed, may still need to recompute
- * light positions & normal transforms for other reasons.
- */
- if (new_state & _MESA_NEW_NEED_EYE_COORDS)
- _mesa_update_tnl_spaces( ctx, new_state );
-
- if (new_state & (_NEW_ARRAY | _NEW_BUFFER_OBJECT))
- update_arrays( ctx );
-
- out:
-
- /*
- * Give the driver a chance to act upon the new_state flags.
- * The driver might plug in different span functions, for example.
- * Also, this is where the driver can invalidate the state of any
- * active modules (such as swrast_setup, swrast, tnl, etc).
- *
- * Set ctx->NewState to zero to avoid recursion if
- * Driver.UpdateState() has to call FLUSH_VERTICES(). (fixed?)
- */
- new_state = ctx->NewState;
- ctx->NewState = 0;
- ctx->Driver.UpdateState(ctx, new_state);
- ctx->Array.NewState = 0;
- if (!ctx->Array.RebindArrays)
- ctx->Array.RebindArrays = (new_state & _NEW_ARRAY) != 0;
-}
-
-
-/* This is the usual entrypoint for state updates:
- */
-void
-_mesa_update_state( struct gl_context *ctx )
-{
- _mesa_lock_context_textures(ctx);
- _mesa_update_state_locked(ctx);
- _mesa_unlock_context_textures(ctx);
-}
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