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-rw-r--r--src/mesa/main/light.c217
1 files changed, 206 insertions, 11 deletions
diff --git a/src/mesa/main/light.c b/src/mesa/main/light.c
index 42180ad7273..3ef2e3eac1b 100644
--- a/src/mesa/main/light.c
+++ b/src/mesa/main/light.c
@@ -610,7 +610,7 @@ void _mesa_update_material( GLcontext *ctx,
if (ctx->Light.ColorMaterialEnabled)
bitmask &= ~ctx->Light.ColorMaterialBitmask;
- if (MESA_VERBOSE&VERBOSE_IMMEDIATE)
+ if (MESA_VERBOSE&VERBOSE_IMMEDIATE)
_mesa_debug(ctx, "_mesa_update_material, mask 0x%x\n", bitmask);
if (!bitmask)
@@ -1119,7 +1119,7 @@ _mesa_validate_all_lighting_tables( GLcontext *ctx )
{
GLint i;
GLfloat shininess;
-
+
shininess = ctx->Light.Material[0].Shininess;
if (!ctx->_ShineTable[0] || ctx->_ShineTable[0]->shininess != shininess)
validate_shine_table( ctx, 0, shininess );
@@ -1146,15 +1146,12 @@ void
_mesa_update_lighting( GLcontext *ctx )
{
struct gl_light *light;
- ctx->_NeedEyeCoords &= ~NEED_EYE_LIGHT;
- ctx->_NeedNormals &= ~NEED_NORMALS_LIGHT;
+ ctx->Light._NeedEyeCoords = 0;
ctx->Light._Flags = 0;
if (!ctx->Light.Enabled)
return;
- ctx->_NeedNormals |= NEED_NORMALS_LIGHT;
-
foreach(light, &ctx->Light.EnabledList) {
ctx->Light._Flags |= light->_Flags;
}
@@ -1164,9 +1161,9 @@ _mesa_update_lighting( GLcontext *ctx )
ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ||
ctx->Light.Model.LocalViewer);
- if ((ctx->Light._Flags & LIGHT_POSITIONAL) ||
- ctx->Light.Model.LocalViewer)
- ctx->_NeedEyeCoords |= NEED_EYE_LIGHT;
+ ctx->Light._NeedEyeCoords = ((ctx->Light._Flags & LIGHT_POSITIONAL) ||
+ ctx->Light.Model.LocalViewer);
+
/* XXX: This test is overkill & needs to be fixed both for software and
@@ -1174,7 +1171,7 @@ _mesa_update_lighting( GLcontext *ctx )
* be tested to verify this.
*/
if (ctx->Light._NeedVertices)
- ctx->_NeedEyeCoords |= NEED_EYE_LIGHT;
+ ctx->Light._NeedEyeCoords = GL_TRUE;
/* Precompute some shading values. Although we reference
@@ -1221,7 +1218,7 @@ _mesa_update_lighting( GLcontext *ctx )
* Update on (_NEW_MODELVIEW | _NEW_LIGHT) when lighting is enabled.
* Also update on lighting space changes.
*/
-void
+static void
_mesa_compute_light_positions( GLcontext *ctx )
{
struct gl_light *light;
@@ -1290,3 +1287,201 @@ _mesa_compute_light_positions( GLcontext *ctx )
}
}
}
+
+
+
+
+
+static void
+update_modelview_scale( GLcontext *ctx )
+{
+ ctx->_ModelViewInvScale = 1.0F;
+ if (ctx->ModelviewMatrixStack.Top->flags & (MAT_FLAG_UNIFORM_SCALE |
+ MAT_FLAG_GENERAL_SCALE |
+ MAT_FLAG_GENERAL_3D |
+ MAT_FLAG_GENERAL) ) {
+ const GLfloat *m = ctx->ModelviewMatrixStack.Top->inv;
+ GLfloat f = m[2] * m[2] + m[6] * m[6] + m[10] * m[10];
+ if (f < 1e-12) f = 1.0;
+ if (ctx->_NeedEyeCoords)
+ ctx->_ModelViewInvScale = (GLfloat) INV_SQRTF(f);
+ else
+ ctx->_ModelViewInvScale = (GLfloat) SQRTF(f);
+ }
+}
+
+
+/* Bring uptodate any state that relies on _NeedEyeCoords.
+ */
+void _mesa_update_tnl_spaces( GLcontext *ctx, GLuint new_state )
+{
+ const GLuint oldneedeyecoords = ctx->_NeedEyeCoords;
+
+ ctx->_NeedEyeCoords = (ctx->_ForceEyeCoords ||
+ (ctx->Texture._GenFlags & TEXGEN_NEED_EYE_COORD) ||
+ ctx->Point._Attenuated ||
+ ctx->Light._NeedEyeCoords);
+
+ /* Check if the truth-value interpretations of the bitfields have
+ * changed:
+ */
+ if ((oldneedeyecoords == 0) != (ctx->_NeedEyeCoords == 0)) {
+ /* Recalculate all state that depends on _NeedEyeCoords.
+ */
+ update_modelview_scale(ctx);
+ _mesa_compute_light_positions( ctx );
+
+ if (ctx->Driver.LightingSpaceChange)
+ ctx->Driver.LightingSpaceChange( ctx );
+ }
+ else {
+ GLuint new_state = ctx->NewState;
+
+ /* Recalculate that same state only if it has been invalidated
+ * by other statechanges.
+ */
+ if (new_state & _NEW_MODELVIEW)
+ update_modelview_scale(ctx);
+
+ if (new_state & (_NEW_LIGHT|_NEW_MODELVIEW))
+ _mesa_compute_light_positions( ctx );
+ }
+}
+
+
+/* Drivers may need this if the hardware tnl unit doesn't support the
+ * light-in-modelspace optimization. It's also useful for debugging.
+ */
+void
+_mesa_allow_light_in_model( GLcontext *ctx, GLboolean flag )
+{
+ ctx->_ForceEyeCoords = flag;
+ ctx->NewState |= _NEW_POINT; /* one of the bits from
+ * _MESA_NEW_NEED_EYE_COORDS.
+ */
+}
+
+
+
+/**********************************************************************/
+/***** Initialization *****/
+/**********************************************************************/
+
+/**
+ * Initialize the n-th light data structure.
+ *
+ * \param l pointer to the gl_light structure to be initialized.
+ * \param n number of the light.
+ * \note The defaults for light 0 are different than the other lights.
+ */
+static void
+init_light( struct gl_light *l, GLuint n )
+{
+ make_empty_list( l );
+
+ ASSIGN_4V( l->Ambient, 0.0, 0.0, 0.0, 1.0 );
+ if (n==0) {
+ ASSIGN_4V( l->Diffuse, 1.0, 1.0, 1.0, 1.0 );
+ ASSIGN_4V( l->Specular, 1.0, 1.0, 1.0, 1.0 );
+ }
+ else {
+ ASSIGN_4V( l->Diffuse, 0.0, 0.0, 0.0, 1.0 );
+ ASSIGN_4V( l->Specular, 0.0, 0.0, 0.0, 1.0 );
+ }
+ ASSIGN_4V( l->EyePosition, 0.0, 0.0, 1.0, 0.0 );
+ ASSIGN_3V( l->EyeDirection, 0.0, 0.0, -1.0 );
+ l->SpotExponent = 0.0;
+ _mesa_invalidate_spot_exp_table( l );
+ l->SpotCutoff = 180.0;
+ l->_CosCutoff = 0.0; /* KW: -ve values not admitted */
+ l->ConstantAttenuation = 1.0;
+ l->LinearAttenuation = 0.0;
+ l->QuadraticAttenuation = 0.0;
+ l->Enabled = GL_FALSE;
+}
+
+/**
+ * Initialize the light model data structure.
+ *
+ * \param lm pointer to the gl_lightmodel structure to be initialized.
+ */
+static void
+init_lightmodel( struct gl_lightmodel *lm )
+{
+ ASSIGN_4V( lm->Ambient, 0.2F, 0.2F, 0.2F, 1.0F );
+ lm->LocalViewer = GL_FALSE;
+ lm->TwoSide = GL_FALSE;
+ lm->ColorControl = GL_SINGLE_COLOR;
+}
+
+/**
+ * Initialize the material data structure.
+ *
+ * \param m pointer to the gl_material structure to be initialized.
+ */
+static void
+init_material( struct gl_material *m )
+{
+ ASSIGN_4V( m->Ambient, 0.2F, 0.2F, 0.2F, 1.0F );
+ ASSIGN_4V( m->Diffuse, 0.8F, 0.8F, 0.8F, 1.0F );
+ ASSIGN_4V( m->Specular, 0.0F, 0.0F, 0.0F, 1.0F );
+ ASSIGN_4V( m->Emission, 0.0F, 0.0F, 0.0F, 1.0F );
+ m->Shininess = 0.0;
+ m->AmbientIndex = 0;
+ m->DiffuseIndex = 1;
+ m->SpecularIndex = 1;
+}
+
+
+void _mesa_init_lighting( GLcontext *ctx )
+{
+ int i;
+
+ /* Lighting group */
+ for (i=0;i<MAX_LIGHTS;i++) {
+ init_light( &ctx->Light.Light[i], i );
+ }
+ make_empty_list( &ctx->Light.EnabledList );
+
+ init_lightmodel( &ctx->Light.Model );
+ init_material( &ctx->Light.Material[0] );
+ init_material( &ctx->Light.Material[1] );
+ ctx->Light.ShadeModel = GL_SMOOTH;
+ ctx->Light.Enabled = GL_FALSE;
+ ctx->Light.ColorMaterialFace = GL_FRONT_AND_BACK;
+ ctx->Light.ColorMaterialMode = GL_AMBIENT_AND_DIFFUSE;
+ ctx->Light.ColorMaterialBitmask = _mesa_material_bitmask( ctx,
+ GL_FRONT_AND_BACK,
+ GL_AMBIENT_AND_DIFFUSE, ~0, 0 );
+
+ ctx->Light.ColorMaterialEnabled = GL_FALSE;
+
+ /* Lighting miscellaneous */
+ ctx->_ShineTabList = MALLOC_STRUCT( gl_shine_tab );
+ make_empty_list( ctx->_ShineTabList );
+ for (i = 0 ; i < 10 ; i++) {
+ struct gl_shine_tab *s = MALLOC_STRUCT( gl_shine_tab );
+ s->shininess = -1;
+ s->refcount = 0;
+ insert_at_tail( ctx->_ShineTabList, s );
+ }
+
+
+
+ /* Miscellaneous */
+ ctx->Light._NeedEyeCoords = 0;
+ ctx->_NeedEyeCoords = 0;
+ ctx->_ModelViewInvScale = 1.0;
+}
+
+
+void _mesa_free_lighting_data( GLcontext *ctx )
+{
+ struct gl_shine_tab *s, *tmps;
+
+ /* Free lighting shininess exponentiation table */
+ foreach_s( s, tmps, ctx->_ShineTabList ) {
+ FREE( s );
+ }
+ FREE( ctx->_ShineTabList );
+}
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