-/* $Id: t_vb_program.c,v 1.6 2002/01/05 20:51:13 brianp Exp $ */
+/* $Id: t_vb_program.c,v 1.10 2002/01/22 14:35:17 brianp Exp $ */
/*
* Mesa 3-D graphics library
* ---------------------------------------------
*/
-/*
- * Authors:
- * Brian Paul
+/**
+ * \file tnl/t_vb_program.c
+ * \brief Pipeline stage for executing vertex programs
+ * \author Brian Paul, Keith Whitwell
*/
#include "t_imm_exec.h"
-
+/**
+ * \warning These values _MUST_ match the values in the OutputRegisters[]
+ * array in vpparse.c!!!
+ */
+#define VERT_RESULT_HPOS 0
+#define VERT_RESULT_COL0 1
+#define VERT_RESULT_COL1 2
+#define VERT_RESULT_BFC0 3
+#define VERT_RESULT_BFC1 4
+#define VERT_RESULT_FOGC 5
+#define VERT_RESULT_PSIZ 6
+#define VERT_RESULT_TEX0 7
+#define VERT_RESULT_TEX1 8
+#define VERT_RESULT_TEX2 9
+#define VERT_RESULT_TEX3 10
+#define VERT_RESULT_TEX4 11
+#define VERT_RESULT_TEX5 12
+#define VERT_RESULT_TEX6 13
+#define VERT_RESULT_TEX7 14
+
+
+/*!
+ * Private storage for the vertex program pipeline stage.
+ */
struct vp_stage_data {
- GLvector4f clipCoords; /* post-modelview/projection coords */
- GLvector4f ndcCoords; /* normalized device coords */
- struct gl_client_array color0[2]; /* front and back */
- struct gl_client_array color1[2]; /* front and back */
- GLvector4f texCoord[MAX_TEXTURE_UNITS];
- GLvector4f fogCoord;
- GLvector1f pointSize;
- GLubyte *clipmask;
- GLubyte ormask, andmask;
+ /** The results of running the vertex program go into these arrays. */
+ GLvector4f attribs[15];
+
+ /* These point to the attribs[VERT_RESULT_COL0, COL1, BFC0, BFC1] arrays */
+ struct gl_client_array color0[2]; /**< diffuse front and back */
+ struct gl_client_array color1[2]; /**< specular front and back */
+
+ GLvector4f ndcCoords; /**< normalized device coords */
+ GLubyte *clipmask; /**< clip flags */
+ GLubyte ormask, andmask; /**< for clipping */
};
#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
+/**
+ * This function executes vertex programs
+ */
static GLboolean run_vp( GLcontext *ctx, struct gl_pipeline_stage *stage )
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vp_stage_data *store = VP_STAGE_DATA(stage);
struct vertex_buffer *VB = &tnl->vb;
struct vp_machine *machine = &(ctx->VertexProgram.Machine);
+ struct vp_program *program = ctx->VertexProgram.Current;
GLint i;
- /* convenience pointers */
- GLfloat (*clip)[4] = (GLfloat (*)[4]) store->clipCoords.data;
- GLfloat (*color0)[4] = (GLfloat (*)[4]) store->color0[0].Ptr;
- GLfloat (*color1)[4] = (GLfloat (*)[4]) store->color1[0].Ptr;
- GLfloat (*bfcolor0)[4] = (GLfloat (*)[4]) store->color0[1].Ptr;
- GLfloat (*bfcolor1)[4] = (GLfloat (*)[4]) store->color1[1].Ptr;
- GLfloat (*fog)[4] = (GLfloat (*)[4]) store->fogCoord.data;
- GLfloat *pointSize = (GLfloat *) store->pointSize.data;
- GLfloat (*texture0)[4] = (GLfloat (*)[4]) store->texCoord[0].data;
- GLfloat (*texture1)[4] = (GLfloat (*)[4]) store->texCoord[1].data;
- GLfloat (*texture2)[4] = (GLfloat (*)[4]) store->texCoord[2].data;
- GLfloat (*texture3)[4] = (GLfloat (*)[4]) store->texCoord[3].data;
-
_mesa_init_tracked_matrices(ctx);
- _mesa_init_vp_registers(ctx); /* sets temp regs to (0,0,0,1) */
+ _mesa_init_vp_registers(ctx); /* init temp and result regs */
+ /* XXX if GL_FOG is enabled but the program doesn't write to the
+ * o[FOGC] register, set the fog result to 1.0
+ */
+ /* XXX if GL_VERTEX_PROGRAM_POINT_SIZE_NV is enabled but the program
+ * doesn't write the PSIZ variable then use ctx->Point.Size
+ */
for (i = 0; i < VB->Count; i++) {
GLuint attr;
VB->AttribPtr[2]->data[i][3]);
#endif
+ /* XXXX
+ * We have to deal with stride!=16 bytes, size!=4, etc in these loops!!!
+ */
+
/* load the input attribute registers */
- for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
- if (VB->Flag[i] & (1 << attr)) {
- COPY_4V(machine->Registers[VP_INPUT_REG_START + attr],
- VB->AttribPtr[attr]->data[i]);
+ if (VB->Flag) {
+ /* the traditional glBegin/glVertex/glEnd case */
+ for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
+ if (VB->Flag[i] & (1 << attr)) {
+ COPY_4V(machine->Registers[VP_INPUT_REG_START + attr],
+ VB->AttribPtr[attr]->data[i]);
+ }
+ }
+ }
+ else {
+ /* the vertex array case */
+ for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
+ const GLubyte *ptr = (const GLubyte *) VB->AttribPtr[attr]->data;
+ const GLint stride = VB->AttribPtr[attr]->stride;
+ const GLfloat *data = (GLfloat *) (ptr + stride * i);
+ const GLint size = VB->AttribPtr[attr]->size;
+ COPY_4V(machine->Registers[VP_INPUT_REG_START + attr], data);
+ if (size == 3)
+ machine->Registers[VP_INPUT_REG_START + attr][3] = 1.0;
}
}
/* execute the program */
- ASSERT(ctx->VertexProgram.Current);
- _mesa_exec_program(ctx, ctx->VertexProgram.Current);
-
+ ASSERT(program);
+ _mesa_exec_program(ctx, program);
#if 0
printf("Output %d: %f, %f, %f, %f\n", i,
machine->Registers[VP_OUT_HPOS][0],
machine->Registers[VP_OUT_COL0][1],
machine->Registers[VP_OUT_COL0][2],
machine->Registers[VP_OUT_COL0][3]);
+ printf("PointSize[%d]: %g\n", i,
+ machine->Registers[VP_OUTPUT_REG_START + VERT_RESULT_PSIZ][0]);
#endif
- /* store the attribute output registers into the VB arrays */
- COPY_4V(clip[i], machine->Registers[VP_OUT_HPOS]);
- COPY_4V(color0[i], machine->Registers[VP_OUT_COL0]);
- COPY_4V(color1[i], machine->Registers[VP_OUT_COL1]);
- COPY_4V(bfcolor0[i], machine->Registers[VP_OUT_BFC0]);
- COPY_4V(bfcolor1[i], machine->Registers[VP_OUT_BFC1]);
- fog[i][0] = machine->Registers[VP_OUT_FOGC][0];
- pointSize[i] = machine->Registers[VP_OUT_PSIZ][0];
- COPY_4V(texture0[i], machine->Registers[VP_OUT_TEX0]);
- COPY_4V(texture1[i], machine->Registers[VP_OUT_TEX0]);
- COPY_4V(texture2[i], machine->Registers[VP_OUT_TEX0]);
- COPY_4V(texture3[i], machine->Registers[VP_OUT_TEX0]);
+ /* copy the output registers into the VB->attribs arrays */
+ /* XXX (optimize) could use a conditional and smaller loop limit here */
+ for (attr = 0; attr < 15; attr++) {
+ COPY_4V( store->attribs[attr].data[i],
+ machine->Registers[VP_OUTPUT_REG_START + attr] );
+ }
}
- VB->ClipPtr = &store->clipCoords;
+ /* Setup the VB pointers so that the next pipeline stages get
+ * their data from the right place (the program output arrays).
+ */
+ VB->ClipPtr = &store->attribs[VERT_RESULT_HPOS];
VB->ClipPtr->size = 4;
VB->ClipPtr->count = VB->Count;
VB->ColorPtr[0] = &store->color0[0];
VB->ColorPtr[1] = &store->color0[1];
VB->SecondaryColorPtr[0] = &store->color1[0];
VB->SecondaryColorPtr[1] = &store->color1[1];
- VB->AttribPtr[VERT_ATTRIB_FOG] = &store->fogCoord;
- VB->PointSizePtr = &store->pointSize;
- VB->TexCoordPtr[0] = &store->texCoord[0];
- VB->TexCoordPtr[1] = &store->texCoord[1];
- VB->TexCoordPtr[2] = &store->texCoord[2];
- VB->TexCoordPtr[3] = &store->texCoord[3];
+ VB->FogCoordPtr = &store->attribs[VERT_RESULT_FOGC];
+ VB->PointSizePtr = &store->attribs[VERT_RESULT_PSIZ];
+ for (i = 0; i < ctx->Const.MaxTextureUnits; i++)
+ VB->TexCoordPtr[i] = &store->attribs[VERT_RESULT_TEX0 + i];
/* Cliptest and perspective divide. Clip functions must clear
* the clipmask.
VB->ClipMask = store->clipmask;
/* XXXX what's this?
- if (VB->ClipPtr == VB->ObjPtr && (VB->importable_data & VERT_OBJ_BIT))
- VB->importable_data |= VERT_CLIP;
+ if (VB->ClipPtr == VB->ObjPtr && (VB->importable_data & VERT_BIT_POS))
+ VB->importable_data |= VERT_BIT_CLIP;
*/
return GL_TRUE;
}
-/* Called in place of do_lighting when the light table may have changed.
+/**
+ * This function validates stuff.
*/
static GLboolean run_validate_program( GLcontext *ctx,
struct gl_pipeline_stage *stage )
}
-
-#if 0
-static void alloc_4chan( struct gl_client_array *a, GLuint sz )
-{
- a->Ptr = ALIGN_MALLOC( sz * sizeof(GLchan) * 4, 32 );
- a->Size = 4;
- a->Type = CHAN_TYPE;
- a->Stride = 0;
- a->StrideB = sizeof(GLchan) * 4;
- a->Enabled = 0;
- a->Flags = 0;
-}
-#endif
-
-static void alloc_4float( struct gl_client_array *a, GLuint sz )
+/**
+ * Initialize a gl_client_array to point into a GLvector4f color vector.
+ */
+static void init_color_array( struct gl_client_array *a, GLvector4f *vec )
{
- a->Ptr = ALIGN_MALLOC( sz * sizeof(GLfloat) * 4, 32 );
+ a->Ptr = vec->data;
a->Size = 4;
a->Type = GL_FLOAT;
a->Stride = 0;
}
-/* Called the first time stage->run is called. In effect, don't
+/**
+ * Called the first time stage->run is called. In effect, don't
* allocate data until the first time the stage is run.
*/
static GLboolean run_init_vp( GLcontext *ctx,
if (!store)
return GL_FALSE;
- /* The output of a vertex program is: */
- _mesa_vector4f_alloc( &store->clipCoords, 0, size, 32 );
+ /* Allocate arrays of vertex output values */
+ for (i = 0; i < 15; i++)
+ _mesa_vector4f_alloc( &store->attribs[i], 0, size, 32 );
+
+ /* Make the color0[] and color1[] arrays point into the attribs[] arrays */
+ init_color_array( &store->color0[0], &store->attribs[VERT_RESULT_COL0] );
+ init_color_array( &store->color0[1], &store->attribs[VERT_RESULT_COL1] );
+ init_color_array( &store->color1[0], &store->attribs[VERT_RESULT_BFC0] );
+ init_color_array( &store->color1[1], &store->attribs[VERT_RESULT_BFC1] );
+
+ /* a few other misc allocations */
_mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );
- alloc_4float( &store->color0[0], size );
- alloc_4float( &store->color0[1], size );
- alloc_4float( &store->color1[0], size );
- alloc_4float( &store->color1[1], size );
- for (i = 0 ; i < ctx->Const.MaxTextureUnits ; i++)
- _mesa_vector4f_alloc( &store->texCoord[i], 0, VB->Size, 32 );
- _mesa_vector4f_alloc( &store->fogCoord, 0, size, 32 );
- _mesa_vector1f_alloc( &store->pointSize, 0, size, 32 );
store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
-
/* Now validate the stage derived data...
*/
stage->run = run_validate_program;
-/*
+/**
* Check if vertex program mode is enabled.
* If so, configure the pipeline stage's type, inputs, and outputs.
*/
stage->active = ctx->VertexProgram.Enabled;
if (stage->active) {
+ /* XXX what do we need here??? */
+ /*
+ GLbitfield vpInput = ctx->VertexProgram.Current->InputsRead;
+ */
+
#if 000
if (stage->privatePtr)
stage->run = run_validate_program;
- stage->inputs = VERT_NORMAL_BIT|VERT_MATERIAL;
+ stage->inputs = VERT_BIT_NORMAL|VERT_BIT_MATERIAL;
if (ctx->Light._NeedVertices)
- stage->inputs |= VERT_EYE; /* effectively, even when lighting in obj */
+ stage->inputs |= VERT_BIT_EYE; /* effectively, even when lighting in obj */
if (ctx->Light.ColorMaterialEnabled)
- stage->inputs |= VERT_COLOR0_BIT;
+ stage->inputs |= VERT_BIT_COLOR0;
- stage->outputs = VERT_COLOR0_BIT;
+ stage->outputs = VERT_BIT_COLOR0;
if (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
- stage->outputs |= VERT_COLOR1_BIT;
+ stage->outputs |= VERT_BIT_COLOR1;
#endif
}
}
+/**
+ * Destructor for this pipeline stage.
+ */
static void dtr( struct gl_pipeline_stage *stage )
{
struct vp_stage_data *store = VP_STAGE_DATA(stage);
if (store) {
GLuint i;
- _mesa_vector4f_free( &store->clipCoords );
+
+ /* free the vertex program result arrays */
+ for (i = 0; i < 15; i++)
+ _mesa_vector4f_free( &store->attribs[i] );
+
+ /* free misc arrays */
_mesa_vector4f_free( &store->ndcCoords );
- ALIGN_FREE( store->color0[0].Ptr );
- ALIGN_FREE( store->color0[1].Ptr );
- ALIGN_FREE( store->color1[0].Ptr );
- ALIGN_FREE( store->color1[1].Ptr );
- for (i = 0 ; i < MAX_TEXTURE_UNITS ; i++)
- if (store->texCoord[i].data)
- _mesa_vector4f_free( &store->texCoord[i] );
- _mesa_vector4f_free( &store->fogCoord );
- _mesa_vector1f_free( &store->pointSize );
ALIGN_FREE( store->clipmask );
FREE( store );
}
}
+/**
+ * Public description of this pipeline stage.
+ */
const struct gl_pipeline_stage _tnl_vertex_program_stage =
{
"vertex-program",
_NEW_ALL, /*XXX FIX */ /* recheck */
_NEW_ALL, /*XXX FIX */ /* recalc -- modelview dependency
* otherwise not captured by inputs
- * (which may be VERT_OBJ_BIT) */
+ * (which may be VERT_BIT_POS) */
GL_FALSE, /* active */
- 0, /* inputs */
- VERT_CLIP | VERT_COLOR0_BIT, /* outputs */
+ /*0*/ VERT_BIT_POS, /* inputs XXX OK? */
+ VERT_BIT_CLIP | VERT_BIT_COLOR0, /* outputs XXX OK? */
0, /* changed_inputs */
NULL, /* private_data */
dtr, /* destroy */
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