/*
* Mesa 3-D graphics library
- * Version: 5.1
*
* Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
*
* 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.
*
*
* Authors:
- * Brian Paul
- * Keith Whitwell <keith@tungstengraphics.com>
+ * Brian Paul Keith Whitwell <keithw@vmware.com>
*/
* stage is the lighting stage-private data
* input is the vector of eye or object-space vertex coordinates
*/
-static void TAG(light_rgba_spec)( GLcontext *ctx,
+static void TAG(light_rgba_spec)( struct gl_context *ctx,
struct vertex_buffer *VB,
struct tnl_pipeline_stage *stage,
GLvector4f *input )
const GLuint nr = VB->Count;
#ifdef TRACE
- fprintf(stderr, "%s\n", __FUNCTION__ );
+ fprintf(stderr, "%s\n", __func__ );
#endif
- VB->ColorPtr[0] = &store->LitColor[0];
- VB->SecondaryColorPtr[0] = &store->LitSecondary[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR1] = &store->LitSecondary[0];
sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
#if IDX & LIGHT_TWOSIDE
- VB->ColorPtr[1] = &store->LitColor[1];
- VB->SecondaryColorPtr[1] = &store->LitSecondary[1];
+ VB->BackfaceColorPtr = &store->LitColor[1];
+ VB->BackfaceSecondaryColorPtr = &store->LitSecondary[1];
sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
#endif
GLint side;
GLfloat contrib[3];
GLfloat attenuation;
- GLfloat VP[3]; /* unit vector from vertex to light */
+ GLfloat VP[3]; /* unit vector from vertex to light */
GLfloat n_dot_VP; /* n dot VP */
GLfloat *h;
d = (GLfloat) LEN_3FV( VP );
- if (d > 1e-6) {
+ if (d > 1e-6F) {
GLfloat invd = 1.0F / d;
SELF_SCALE_SCALAR_3V(VP, invd);
}
continue; /* this light makes no contribution */
}
else {
- GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
- GLint k = (GLint) x;
- GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
- + (x-k)*light->_SpotExpTable[k][1]);
+ GLfloat spot = powf(PV_dot_dir, light->SpotExponent);
attenuation *= spot;
}
}
}
- if (attenuation < 1e-3)
+ if (attenuation < 1e-3F)
continue; /* this light makes no contribution */
/* Compute dot product or normal and vector from V to light pos */
n_dot_h = correction * DOT3(normal, h);
if (n_dot_h > 0.0F) {
- GLfloat spec_coef;
- struct gl_shine_tab *tab = ctx->_ShineTable[side];
- GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef );
-
- if (spec_coef > 1.0e-10) {
+ GLfloat spec_coef = lookup_shininess(ctx, side, n_dot_h);
+ if (spec_coef > 1.0e-10F) {
spec_coef *= attenuation;
ACC_SCALE_SCALAR_3V( spec[side], spec_coef,
light->_MatSpecular[side]);
}
-static void TAG(light_rgba)( GLcontext *ctx,
+static void TAG(light_rgba)( struct gl_context *ctx,
struct vertex_buffer *VB,
struct tnl_pipeline_stage *stage,
GLvector4f *input )
const GLuint nr = VB->Count;
#ifdef TRACE
- fprintf(stderr, "%s\n", __FUNCTION__ );
+ fprintf(stderr, "%s\n", __func__ );
#endif
- VB->ColorPtr[0] = &store->LitColor[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0];
sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
#if IDX & LIGHT_TWOSIDE
- VB->ColorPtr[1] = &store->LitColor[1];
+ VB->BackfaceColorPtr = &store->LitColor[1];
sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
#endif
/* Add contribution from each enabled light source */
foreach (light, &ctx->Light.EnabledList) {
-
GLfloat n_dot_h;
GLfloat correction;
GLint side;
GLfloat contrib[3];
- GLfloat attenuation = 1.0;
+ GLfloat attenuation;
GLfloat VP[3]; /* unit vector from vertex to light */
GLfloat n_dot_VP; /* n dot VP */
GLfloat *h;
else {
GLfloat d; /* distance from vertex to light */
-
SUB_3V(VP, light->_Position, vertex);
d = (GLfloat) LEN_3FV( VP );
- if ( d > 1e-6) {
+ if (d > 1e-6F) {
GLfloat invd = 1.0F / d;
SELF_SCALE_SCALAR_3V(VP, invd);
}
continue; /* this light makes no contribution */
}
else {
- GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
- GLint k = (GLint) x;
- GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
- + (x-k)*light->_SpotExpTable[k][1]);
+ GLfloat spot = powf(PV_dot_dir, light->SpotExponent);
attenuation *= spot;
}
}
}
- if (attenuation < 1e-3)
+ if (attenuation < 1e-3F)
continue; /* this light makes no contribution */
/* Compute dot product or normal and vector from V to light pos */
n_dot_h = correction * DOT3(normal, h);
- if (n_dot_h > 0.0F)
- {
- GLfloat spec_coef;
- struct gl_shine_tab *tab = ctx->_ShineTable[side];
-
- GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef );
-
+ if (n_dot_h > 0.0F) {
+ GLfloat spec_coef = lookup_shininess(ctx, side, n_dot_h);
ACC_SCALE_SCALAR_3V( contrib, spec_coef,
light->_MatSpecular[side]);
}
/* As below, but with just a single light.
*/
-static void TAG(light_fast_rgba_single)( GLcontext *ctx,
+static void TAG(light_fast_rgba_single)( struct gl_context *ctx,
struct vertex_buffer *VB,
struct tnl_pipeline_stage *stage,
GLvector4f *input )
#endif
#ifdef TRACE
- fprintf(stderr, "%s\n", __FUNCTION__ );
+ fprintf(stderr, "%s\n", __func__ );
#endif
(void) input; /* doesn't refer to Eye or Obj */
- VB->ColorPtr[0] = &store->LitColor[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0];
#if IDX & LIGHT_TWOSIDE
- VB->ColorPtr[1] = &store->LitColor[1];
+ VB->BackfaceColorPtr = &store->LitColor[1];
#endif
if (nr > 1) {
COPY_3V(sum, base[1]);
ACC_SCALE_SCALAR_3V(sum, -n_dot_VP, light->_MatDiffuse[1]);
if (n_dot_h > 0.0F) {
- GLfloat spec;
- GET_SHINE_TAB_ENTRY( ctx->_ShineTable[1], n_dot_h, spec );
+ GLfloat spec = lookup_shininess(ctx, 1, n_dot_h);
ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[1]);
}
COPY_3V(Bcolor[j], sum );
COPY_3V(sum, base[0]);
ACC_SCALE_SCALAR_3V(sum, n_dot_VP, light->_MatDiffuse[0]);
if (n_dot_h > 0.0F) {
- GLfloat spec;
- GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec );
+ GLfloat spec = lookup_shininess(ctx, 0, n_dot_h);
ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[0]);
-
}
COPY_3V(Fcolor[j], sum );
Fcolor[j][3] = base[0][3];
/* Light infinite lights
*/
-static void TAG(light_fast_rgba)( GLcontext *ctx,
+static void TAG(light_fast_rgba)( struct gl_context *ctx,
struct vertex_buffer *VB,
struct tnl_pipeline_stage *stage,
GLvector4f *input )
const struct gl_light *light;
#ifdef TRACE
- fprintf(stderr, "%s %d\n", __FUNCTION__, nr );
+ fprintf(stderr, "%s %d\n", __func__, nr );
#endif
(void) input;
sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3];
sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3];
- VB->ColorPtr[0] = &store->LitColor[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0];
#if IDX & LIGHT_TWOSIDE
- VB->ColorPtr[1] = &store->LitColor[1];
+ VB->BackfaceColorPtr = &store->LitColor[1];
#endif
if (nr > 1) {
ACC_SCALE_SCALAR_3V(sum[0], n_dot_VP, light->_MatDiffuse[0]);
n_dot_h = DOT3(normal, light->_h_inf_norm);
if (n_dot_h > 0.0F) {
- struct gl_shine_tab *tab = ctx->_ShineTable[0];
- GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec );
+ spec = lookup_shininess(ctx, 0, n_dot_h);
ACC_SCALE_SCALAR_3V( sum[0], spec, light->_MatSpecular[0]);
}
}
ACC_SCALE_SCALAR_3V(sum[1], -n_dot_VP, light->_MatDiffuse[1]);
n_dot_h = -DOT3(normal, light->_h_inf_norm);
if (n_dot_h > 0.0F) {
- struct gl_shine_tab *tab = ctx->_ShineTable[1];
- GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec );
+ spec = lookup_shininess(ctx, 1, n_dot_h);
ACC_SCALE_SCALAR_3V( sum[1], spec, light->_MatSpecular[1]);
}
}
-
-/*
- * Use current lighting/material settings to compute the color indexes
- * for an array of vertices.
- * Input: n - number of vertices to light
- * side - 0=use front material, 1=use back material
- * vertex - array of [n] vertex position in eye coordinates
- * normal - array of [n] surface normal vector
- * Output: indexResult - resulting array of [n] color indexes
- */
-static void TAG(light_ci)( GLcontext *ctx,
- struct vertex_buffer *VB,
- struct tnl_pipeline_stage *stage,
- GLvector4f *input )
-{
- struct light_stage_data *store = LIGHT_STAGE_DATA(stage);
- GLuint j;
- const GLuint vstride = input->stride;
- const GLfloat *vertex = (GLfloat *) input->data;
- const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride;
- const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data;
- GLfloat *indexResult[2];
- const GLuint nr = VB->Count;
-
-#ifdef TRACE
- fprintf(stderr, "%s\n", __FUNCTION__ );
-#endif
-
- VB->IndexPtr[0] = &store->LitIndex[0];
-#if IDX & LIGHT_TWOSIDE
- VB->IndexPtr[1] = &store->LitIndex[1];
-#endif
-
- indexResult[0] = (GLfloat *)VB->IndexPtr[0]->data;
-#if IDX & LIGHT_TWOSIDE
- indexResult[1] = (GLfloat *)VB->IndexPtr[1]->data;
-#endif
-
- /* loop over vertices */
- for (j=0; j<nr; j++,STRIDE_F(vertex,vstride),STRIDE_F(normal, nstride)) {
- GLfloat diffuse[2], specular[2];
- GLuint side = 0;
- struct gl_light *light;
-
-#if IDX & LIGHT_MATERIAL
- update_materials( ctx, store );
-#endif
-
- diffuse[0] = specular[0] = 0.0F;
-
-#if IDX & LIGHT_TWOSIDE
- diffuse[1] = specular[1] = 0.0F;
-#endif
-
- /* Accumulate diffuse and specular from each light source */
- foreach (light, &ctx->Light.EnabledList) {
-
- GLfloat attenuation = 1.0F;
- GLfloat VP[3]; /* unit vector from vertex to light */
- GLfloat n_dot_VP; /* dot product of l and n */
- GLfloat *h, n_dot_h, correction = 1.0;
-
- /* compute l and attenuation */
- if (!(light->_Flags & LIGHT_POSITIONAL)) {
- /* directional light */
- COPY_3V(VP, light->_VP_inf_norm);
- }
- else {
- GLfloat d; /* distance from vertex to light */
-
- SUB_3V(VP, light->_Position, vertex);
-
- d = (GLfloat) LEN_3FV( VP );
- if ( d > 1e-6) {
- GLfloat invd = 1.0F / d;
- SELF_SCALE_SCALAR_3V(VP, invd);
- }
-
- attenuation = 1.0F / (light->ConstantAttenuation + d *
- (light->LinearAttenuation + d *
- light->QuadraticAttenuation));
-
- /* spotlight attenuation */
- if (light->_Flags & LIGHT_SPOT) {
- GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection);
- if (PV_dot_dir < light->_CosCutoff) {
- continue; /* this light makes no contribution */
- }
- else {
- GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1);
- GLint k = (GLint) x;
- GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0]
- + (x-k)*light->_SpotExpTable[k][1]);
- attenuation *= spot;
- }
- }
- }
-
- if (attenuation < 1e-3)
- continue; /* this light makes no contribution */
-
- n_dot_VP = DOT3( normal, VP );
-
- /* which side are we lighting? */
- if (n_dot_VP < 0.0F) {
-#if IDX & LIGHT_TWOSIDE
- side = 1;
- correction = -1;
- n_dot_VP = -n_dot_VP;
-#else
- continue;
-#endif
- }
-
- /* accumulate diffuse term */
- diffuse[side] += n_dot_VP * light->_dli * attenuation;
-
- /* specular term */
- if (ctx->Light.Model.LocalViewer) {
- GLfloat v[3];
- COPY_3V(v, vertex);
- NORMALIZE_3FV(v);
- SUB_3V(VP, VP, v); /* h = VP + VPe */
- h = VP;
- NORMALIZE_3FV(h);
- }
- else if (light->_Flags & LIGHT_POSITIONAL) {
- h = VP;
- /* Strangely, disabling this addition fixes a conformance
- * problem. If this code is enabled, l_sed.c fails.
- */
- /*ACC_3V(h, ctx->_EyeZDir);*/
- NORMALIZE_3FV(h);
- }
- else {
- h = light->_h_inf_norm;
- }
-
- n_dot_h = correction * DOT3(normal, h);
- if (n_dot_h > 0.0F) {
- GLfloat spec_coef;
- struct gl_shine_tab *tab = ctx->_ShineTable[side];
- GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef);
- specular[side] += spec_coef * light->_sli * attenuation;
- }
- } /*loop over lights*/
-
- /* Now compute final color index */
- for (side = 0 ; side < NR_SIDES ; side++) {
- const GLfloat *ind = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_INDEXES + side];
- GLfloat index;
-
- if (specular[side] > 1.0F) {
- index = ind[MAT_INDEX_SPECULAR];
- }
- else {
- GLfloat d_a = ind[MAT_INDEX_DIFFUSE] - ind[MAT_INDEX_AMBIENT];
- GLfloat s_a = ind[MAT_INDEX_SPECULAR] - ind[MAT_INDEX_AMBIENT];
- index = (ind[MAT_INDEX_AMBIENT]
- + diffuse[side] * (1.0F-specular[side]) * d_a
- + specular[side] * s_a);
- if (index > ind[MAT_INDEX_SPECULAR]) {
- index = ind[MAT_INDEX_SPECULAR];
- }
- }
- indexResult[side][j] = index;
- }
- } /*for vertex*/
-}
-
-
-
static void TAG(init_light_tab)( void )
{
_tnl_light_tab[IDX] = TAG(light_rgba);
_tnl_light_fast_tab[IDX] = TAG(light_fast_rgba);
_tnl_light_fast_single_tab[IDX] = TAG(light_fast_rgba_single);
_tnl_light_spec_tab[IDX] = TAG(light_rgba_spec);
- _tnl_light_ci_tab[IDX] = TAG(light_ci);
}
projects / mesa.git / blobdiff