mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 08:08:38 +00:00
320 lines
8.8 KiB
C
320 lines
8.8 KiB
C
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 6.5
|
|
*
|
|
* Copyright (C) 1999-2006 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 <precomp.h>
|
|
|
|
#define LIGHT_TWOSIDE 0x1
|
|
#define LIGHT_MATERIAL 0x2
|
|
#define MAX_LIGHT_FUNC 0x4
|
|
|
|
typedef void (*light_func)( struct gl_context *ctx,
|
|
struct vertex_buffer *VB,
|
|
struct tnl_pipeline_stage *stage,
|
|
GLvector4f *input );
|
|
|
|
/**
|
|
* Information for updating current material attributes from vertex color,
|
|
* for GL_COLOR_MATERIAL.
|
|
*/
|
|
struct material_cursor {
|
|
const GLfloat *ptr; /* points to src vertex color (in VB array) */
|
|
GLuint stride; /* stride to next vertex color (bytes) */
|
|
GLfloat *current; /* points to material attribute to update */
|
|
GLuint size; /* vertex/color size: 1, 2, 3 or 4 */
|
|
};
|
|
|
|
/**
|
|
* Data private to this pipeline stage.
|
|
*/
|
|
struct light_stage_data {
|
|
GLvector4f Input;
|
|
GLvector4f LitColor[2];
|
|
light_func *light_func_tab;
|
|
|
|
struct material_cursor mat[MAT_ATTRIB_MAX];
|
|
GLuint mat_count;
|
|
GLuint mat_bitmask;
|
|
};
|
|
|
|
|
|
#define LIGHT_STAGE_DATA(stage) ((struct light_stage_data *)(stage->privatePtr))
|
|
|
|
|
|
|
|
/**
|
|
* In the case of colormaterial, the effected material attributes
|
|
* should already have been bound to point to the incoming color data,
|
|
* prior to running the pipeline.
|
|
* This function copies the vertex's color to the material attributes
|
|
* which are tracking glColor.
|
|
* It's called per-vertex in the lighting loop.
|
|
*/
|
|
static void
|
|
update_materials(struct gl_context *ctx, struct light_stage_data *store)
|
|
{
|
|
GLuint i;
|
|
|
|
for (i = 0 ; i < store->mat_count ; i++) {
|
|
/* update the material */
|
|
COPY_CLEAN_4V(store->mat[i].current, store->mat[i].size, store->mat[i].ptr);
|
|
/* increment src vertex color pointer */
|
|
STRIDE_F(store->mat[i].ptr, store->mat[i].stride);
|
|
}
|
|
|
|
/* recompute derived light/material values */
|
|
_mesa_update_material( ctx, store->mat_bitmask );
|
|
/* XXX we should only call this if we're tracking/changing the specular
|
|
* exponent.
|
|
*/
|
|
_mesa_validate_all_lighting_tables( ctx );
|
|
}
|
|
|
|
|
|
/**
|
|
* Prepare things prior to running the lighting stage.
|
|
* Return number of material attributes which will track vertex color.
|
|
*/
|
|
static GLuint
|
|
prepare_materials(struct gl_context *ctx,
|
|
struct vertex_buffer *VB, struct light_stage_data *store)
|
|
{
|
|
GLuint i;
|
|
|
|
store->mat_count = 0;
|
|
store->mat_bitmask = 0;
|
|
|
|
/* Examine the ColorMaterialBitmask to determine which materials
|
|
* track vertex color. Override the material attribute's pointer
|
|
* with the color pointer for each one.
|
|
*/
|
|
if (ctx->Light.ColorMaterialEnabled) {
|
|
const GLuint bitmask = ctx->Light.ColorMaterialBitmask;
|
|
for (i = 0 ; i < MAT_ATTRIB_MAX ; i++)
|
|
if (bitmask & (1<<i))
|
|
VB->AttribPtr[_TNL_ATTRIB_MAT_FRONT_AMBIENT + i] = VB->AttribPtr[_TNL_ATTRIB_COLOR];
|
|
}
|
|
|
|
/* Now, for each material attribute that's tracking vertex color, save
|
|
* some values (ptr, stride, size, current) that we'll need in
|
|
* update_materials(), above, that'll actually copy the vertex color to
|
|
* the material attribute(s).
|
|
*/
|
|
for (i = _TNL_FIRST_MAT; i <= _TNL_LAST_MAT; i++) {
|
|
if (VB->AttribPtr[i]->stride) {
|
|
const GLuint j = store->mat_count++;
|
|
const GLuint attr = i - _TNL_ATTRIB_MAT_FRONT_AMBIENT;
|
|
store->mat[j].ptr = VB->AttribPtr[i]->start;
|
|
store->mat[j].stride = VB->AttribPtr[i]->stride;
|
|
store->mat[j].size = VB->AttribPtr[i]->size;
|
|
store->mat[j].current = ctx->Light.Material.Attrib[attr];
|
|
store->mat_bitmask |= (1<<attr);
|
|
}
|
|
}
|
|
|
|
/* FIXME: Is this already done?
|
|
*/
|
|
_mesa_update_material( ctx, ~0 );
|
|
_mesa_validate_all_lighting_tables( ctx );
|
|
|
|
return store->mat_count;
|
|
}
|
|
|
|
/* Tables for all the shading functions.
|
|
*/
|
|
static light_func _tnl_light_tab[MAX_LIGHT_FUNC];
|
|
static light_func _tnl_light_fast_tab[MAX_LIGHT_FUNC];
|
|
static light_func _tnl_light_fast_single_tab[MAX_LIGHT_FUNC];
|
|
static light_func _tnl_light_spec_tab[MAX_LIGHT_FUNC];
|
|
|
|
#define TAG(x) x
|
|
#define IDX (0)
|
|
#include "t_vb_lighttmp.h"
|
|
|
|
#define TAG(x) x##_twoside
|
|
#define IDX (LIGHT_TWOSIDE)
|
|
#include "t_vb_lighttmp.h"
|
|
|
|
#define TAG(x) x##_material
|
|
#define IDX (LIGHT_MATERIAL)
|
|
#include "t_vb_lighttmp.h"
|
|
|
|
#define TAG(x) x##_twoside_material
|
|
#define IDX (LIGHT_TWOSIDE|LIGHT_MATERIAL)
|
|
#include "t_vb_lighttmp.h"
|
|
|
|
|
|
static void init_lighting_tables( void )
|
|
{
|
|
static int done;
|
|
|
|
if (!done) {
|
|
init_light_tab();
|
|
init_light_tab_twoside();
|
|
init_light_tab_material();
|
|
init_light_tab_twoside_material();
|
|
done = 1;
|
|
}
|
|
}
|
|
|
|
|
|
static GLboolean run_lighting( struct gl_context *ctx,
|
|
struct tnl_pipeline_stage *stage )
|
|
{
|
|
struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
struct vertex_buffer *VB = &tnl->vb;
|
|
GLvector4f *input = ctx->_NeedEyeCoords ? VB->EyePtr : VB->AttribPtr[_TNL_ATTRIB_POS];
|
|
GLuint idx;
|
|
|
|
if (!ctx->Light.Enabled)
|
|
return GL_TRUE;
|
|
|
|
/* Make sure we can talk about position x,y and z:
|
|
*/
|
|
if (input->size <= 2 && input == VB->AttribPtr[_TNL_ATTRIB_POS]) {
|
|
|
|
_math_trans_4f( store->Input.data,
|
|
VB->AttribPtr[_TNL_ATTRIB_POS]->data,
|
|
VB->AttribPtr[_TNL_ATTRIB_POS]->stride,
|
|
GL_FLOAT,
|
|
VB->AttribPtr[_TNL_ATTRIB_POS]->size,
|
|
0,
|
|
VB->Count );
|
|
|
|
if (input->size <= 2) {
|
|
/* Clean z.
|
|
*/
|
|
_mesa_vector4f_clean_elem(&store->Input, VB->Count, 2);
|
|
}
|
|
|
|
if (input->size <= 1) {
|
|
/* Clean y.
|
|
*/
|
|
_mesa_vector4f_clean_elem(&store->Input, VB->Count, 1);
|
|
}
|
|
|
|
input = &store->Input;
|
|
}
|
|
|
|
idx = 0;
|
|
|
|
if (prepare_materials( ctx, VB, store ))
|
|
idx |= LIGHT_MATERIAL;
|
|
|
|
if (ctx->Light.Model.TwoSide)
|
|
idx |= LIGHT_TWOSIDE;
|
|
|
|
/* The individual functions know about replaying side-effects
|
|
* vs. full re-execution.
|
|
*/
|
|
store->light_func_tab[idx]( ctx, VB, stage, input );
|
|
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
/* Called in place of do_lighting when the light table may have changed.
|
|
*/
|
|
static void validate_lighting( struct gl_context *ctx,
|
|
struct tnl_pipeline_stage *stage )
|
|
{
|
|
light_func *tab;
|
|
|
|
if (!ctx->Light.Enabled)
|
|
return;
|
|
|
|
if (ctx->Light._NeedVertices) {
|
|
tab = _tnl_light_tab;
|
|
}
|
|
else {
|
|
if (ctx->Light.EnabledList.next == ctx->Light.EnabledList.prev)
|
|
tab = _tnl_light_fast_single_tab;
|
|
else
|
|
tab = _tnl_light_fast_tab;
|
|
}
|
|
|
|
|
|
LIGHT_STAGE_DATA(stage)->light_func_tab = tab;
|
|
|
|
/* This and the above should only be done on _NEW_LIGHT:
|
|
*/
|
|
TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx );
|
|
}
|
|
|
|
|
|
|
|
/* Called the first time stage->run is called. In effect, don't
|
|
* allocate data until the first time the stage is run.
|
|
*/
|
|
static GLboolean init_lighting( struct gl_context *ctx,
|
|
struct tnl_pipeline_stage *stage )
|
|
{
|
|
TNLcontext *tnl = TNL_CONTEXT(ctx);
|
|
struct light_stage_data *store;
|
|
GLuint size = tnl->vb.Size;
|
|
|
|
stage->privatePtr = MALLOC(sizeof(*store));
|
|
store = LIGHT_STAGE_DATA(stage);
|
|
if (!store)
|
|
return GL_FALSE;
|
|
|
|
/* Do onetime init.
|
|
*/
|
|
init_lighting_tables();
|
|
|
|
_mesa_vector4f_alloc( &store->Input, 0, size, 32 );
|
|
_mesa_vector4f_alloc( &store->LitColor[0], 0, size, 32 );
|
|
_mesa_vector4f_alloc( &store->LitColor[1], 0, size, 32 );
|
|
|
|
store->LitColor[0].size = 4;
|
|
store->LitColor[1].size = 4;
|
|
|
|
return GL_TRUE;
|
|
}
|
|
|
|
|
|
|
|
|
|
static void dtr( struct tnl_pipeline_stage *stage )
|
|
{
|
|
struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
|
|
|
|
if (store) {
|
|
_mesa_vector4f_free( &store->Input );
|
|
_mesa_vector4f_free( &store->LitColor[0] );
|
|
_mesa_vector4f_free( &store->LitColor[1] );
|
|
FREE( store );
|
|
stage->privatePtr = NULL;
|
|
}
|
|
}
|
|
|
|
const struct tnl_pipeline_stage _tnl_lighting_stage =
|
|
{
|
|
"lighting", /* name */
|
|
NULL, /* private_data */
|
|
init_lighting,
|
|
dtr, /* destroy */
|
|
validate_lighting,
|
|
run_lighting
|
|
};
|