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-rw-r--r--mesalib/src/mesa/tnl/t_vb_light.c362
1 files changed, 362 insertions, 0 deletions
diff --git a/mesalib/src/mesa/tnl/t_vb_light.c b/mesalib/src/mesa/tnl/t_vb_light.c
new file mode 100644
index 000000000..f47f99397
--- /dev/null
+++ b/mesalib/src/mesa/tnl/t_vb_light.c
@@ -0,0 +1,362 @@
+/*
+ * 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 "main/glheader.h"
+#include "main/colormac.h"
+#include "main/light.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/simple_list.h"
+#include "main/mtypes.h"
+
+#include "math/m_translate.h"
+
+#include "t_context.h"
+#include "t_pipeline.h"
+
+#define LIGHT_TWOSIDE 0x1
+#define LIGHT_MATERIAL 0x2
+#define MAX_LIGHT_FUNC 0x4
+
+typedef void (*light_func)( GLcontext *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];
+ GLvector4f LitSecondary[2];
+ GLvector4f LitIndex[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(GLcontext *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(GLcontext *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->ColorPtr[0];
+ }
+
+ /* 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];
+static light_func _tnl_light_ci_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( GLcontext *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->ObjPtr;
+ GLuint idx;
+
+ if (!ctx->Light.Enabled || ctx->VertexProgram._Current)
+ return GL_TRUE;
+
+ /* Make sure we can talk about position x,y and z:
+ */
+ if (input->size <= 2 && input == VB->ObjPtr) {
+
+ _math_trans_4f( store->Input.data,
+ VB->ObjPtr->data,
+ VB->ObjPtr->stride,
+ GL_FLOAT,
+ VB->ObjPtr->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 );
+
+ VB->AttribPtr[_TNL_ATTRIB_COLOR0] = VB->ColorPtr[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR1] = VB->SecondaryColorPtr[0];
+ VB->AttribPtr[_TNL_ATTRIB_COLOR_INDEX] = VB->IndexPtr[0];
+
+ return GL_TRUE;
+}
+
+
+/* Called in place of do_lighting when the light table may have changed.
+ */
+static void validate_lighting( GLcontext *ctx,
+ struct tnl_pipeline_stage *stage )
+{
+ light_func *tab;
+
+ if (!ctx->Light.Enabled || ctx->VertexProgram._Current)
+ return;
+
+ if (ctx->Visual.rgbMode) {
+ if (ctx->Light._NeedVertices) {
+ if (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
+ tab = _tnl_light_spec_tab;
+ else
+ 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;
+ }
+ }
+ else
+ tab = _tnl_light_ci_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( GLcontext *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 );
+ _mesa_vector4f_alloc( &store->LitSecondary[0], 0, size, 32 );
+ _mesa_vector4f_alloc( &store->LitSecondary[1], 0, size, 32 );
+ _mesa_vector4f_alloc( &store->LitIndex[0], 0, size, 32 );
+ _mesa_vector4f_alloc( &store->LitIndex[1], 0, size, 32 );
+
+ store->LitColor[0].size = 4;
+ store->LitColor[1].size = 4;
+ store->LitSecondary[0].size = 3;
+ store->LitSecondary[1].size = 3;
+
+ store->LitIndex[0].size = 1;
+ store->LitIndex[0].stride = sizeof(GLfloat);
+ store->LitIndex[1].size = 1;
+ store->LitIndex[1].stride = sizeof(GLfloat);
+
+ 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] );
+ _mesa_vector4f_free( &store->LitSecondary[0] );
+ _mesa_vector4f_free( &store->LitSecondary[1] );
+ _mesa_vector4f_free( &store->LitIndex[0] );
+ _mesa_vector4f_free( &store->LitIndex[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
+};
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