/*
* Mesa 3-D graphics library
- * Version: 6.5.3
+ * Version: 7.1
*
* Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
*
/**
* \file tnl/t_vb_program.c
- * \brief Pipeline stage for executing NVIDIA vertex programs.
+ * \brief Pipeline stage for executing vertex programs.
* \author Brian Paul, Keith Whitwell
*/
-#include "glheader.h"
-#include "context.h"
-#include "macros.h"
-#include "imports.h"
-#include "prog_instruction.h"
-#include "prog_statevars.h"
-#include "prog_execute.h"
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "shader/prog_instruction.h"
+#include "shader/prog_statevars.h"
+#include "shader/prog_execute.h"
+#include "swrast/s_context.h"
+#include "swrast/s_texfilter.h"
-#include "tnl.h"
-#include "t_context.h"
-#include "t_pipeline.h"
+#include "tnl/tnl.h"
+#include "tnl/t_context.h"
+#include "tnl/t_pipeline.h"
#define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
+static void
+userclip( GLcontext *ctx,
+ GLvector4f *clip,
+ GLubyte *clipmask,
+ GLubyte *clipormask,
+ GLubyte *clipandmask )
+{
+ GLuint p;
+
+ for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
+ if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
+ GLuint nr, i;
+ const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
+ const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
+ const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
+ const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
+ GLfloat *coord = (GLfloat *)clip->data;
+ GLuint stride = clip->stride;
+ GLuint count = clip->count;
+
+ for (nr = 0, i = 0 ; i < count ; i++) {
+ GLfloat dp = (coord[0] * a +
+ coord[1] * b +
+ coord[2] * c +
+ coord[3] * d);
+
+ if (dp < 0) {
+ nr++;
+ clipmask[i] |= CLIP_USER_BIT;
+ }
+
+ STRIDE_F(coord, stride);
+ }
+
+ if (nr > 0) {
+ *clipormask |= CLIP_USER_BIT;
+ if (nr == count) {
+ *clipandmask |= CLIP_USER_BIT;
+ return;
+ }
+ }
+ }
+ }
+}
+
+
+static GLboolean
+do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
+{
+ TNLcontext *tnl = TNL_CONTEXT(ctx);
+ struct vertex_buffer *VB = &tnl->vb;
+ /* Cliptest and perspective divide. Clip functions must clear
+ * the clipmask.
+ */
+ store->ormask = 0;
+ store->andmask = CLIP_FRUSTUM_BITS;
+
+ if (tnl->NeedNdcCoords) {
+ VB->NdcPtr =
+ _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
+ &store->ndcCoords,
+ store->clipmask,
+ &store->ormask,
+ &store->andmask );
+ }
+ else {
+ VB->NdcPtr = NULL;
+ _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
+ NULL,
+ store->clipmask,
+ &store->ormask,
+ &store->andmask );
+ }
+
+ if (store->andmask) {
+ /* All vertices are outside the frustum */
+ return GL_FALSE;
+ }
+
+ /* Test userclip planes. This contributes to VB->ClipMask.
+ */
+ /** XXX NEW_SLANG _Enabled ??? */
+ if (ctx->Transform.ClipPlanesEnabled && (!ctx->VertexProgram._Enabled ||
+ ctx->VertexProgram.Current->IsPositionInvariant)) {
+ userclip( ctx,
+ VB->ClipPtr,
+ store->clipmask,
+ &store->ormask,
+ &store->andmask );
+
+ if (store->andmask) {
+ return GL_FALSE;
+ }
+ }
+
+ VB->ClipAndMask = store->andmask;
+ VB->ClipOrMask = store->ormask;
+ VB->ClipMask = store->clipmask;
+
+ return GL_TRUE;
+}
+
+
+/**
+ * XXX the texture sampling code in this module is a bit of a hack.
+ * The texture sampling code is in swrast, though it doesn't have any
+ * real dependencies on the rest of swrast. It should probably be
+ * moved into main/ someday.
+ */
+static void
+vp_fetch_texel(GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda,
+ GLuint unit, GLfloat color[4])
+{
+ SWcontext *swrast = SWRAST_CONTEXT(ctx);
+
+ /* XXX use a float-valued TextureSample routine here!!! */
+ swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current,
+ 1, (const GLfloat (*)[4]) texcoord,
+ &lambda, (GLfloat (*)[4]) color);
+}
+
+
+/**
+ * Called via ctx->Driver.ProgramStringNotify() after a new vertex program
+ * string has been parsed.
+ */
+void
+_tnl_program_string(GLcontext *ctx, GLenum target, struct gl_program *program)
+{
+ /* No-op.
+ * If we had derived anything from the program that was private to this
+ * stage we'd recompute/validate it here.
+ */
+}
+
+
/**
* Initialize virtual machine state prior to executing vertex program.
*/
{
/* Input registers get initialized from the current vertex attribs */
MEMCPY(machine->VertAttribs, ctx->Current.Attrib,
- MAX_VERTEX_PROGRAM_ATTRIBS * 4 * sizeof(GLfloat));
+ MAX_VERTEX_GENERIC_ATTRIBS * 4 * sizeof(GLfloat));
- if (ctx->VertexProgram.Current->IsNVProgram) {
+ if (ctx->VertexProgram._Current->IsNVProgram) {
GLuint i;
/* Output/result regs are initialized to [0,0,0,1] */
for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
}
}
+ machine->NumDeriv = 0;
+
/* init condition codes */
machine->CondCodes[0] = COND_EQ;
machine->CondCodes[1] = COND_EQ;
machine->CondCodes[2] = COND_EQ;
machine->CondCodes[3] = COND_EQ;
-}
+ /* init call stack */
+ machine->StackDepth = 0;
-/**
- * Copy the 16 elements of a matrix into four consecutive program
- * registers starting at 'pos'.
- */
-static void
-load_matrix(GLfloat registers[][4], GLuint pos, const GLfloat mat[16])
-{
- GLuint i;
- for (i = 0; i < 4; i++) {
- registers[pos + i][0] = mat[0 + i];
- registers[pos + i][1] = mat[4 + i];
- registers[pos + i][2] = mat[8 + i];
- registers[pos + i][3] = mat[12 + i];
- }
+ machine->FetchTexelLod = vp_fetch_texel;
+ machine->FetchTexelDeriv = NULL; /* not used by vertex programs */
+
+ machine->Samplers = ctx->VertexProgram._Current->Base.SamplerUnits;
}
/**
- * As above, but transpose the matrix.
+ * Map the texture images which the vertex program will access (if any).
*/
static void
-load_transpose_matrix(GLfloat registers[][4], GLuint pos,
- const GLfloat mat[16])
+map_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
{
- MEMCPY(registers[pos], mat, 16 * sizeof(GLfloat));
+ GLuint u;
+
+ if (!ctx->Driver.MapTexture)
+ return;
+
+ for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
+ if (vp->Base.TexturesUsed[u]) {
+ /* Note: _Current *should* correspond to the target indicated
+ * in TexturesUsed[u].
+ */
+ ctx->Driver.MapTexture(ctx, ctx->Texture.Unit[u]._Current);
+ }
+ }
}
/**
- * Load current vertex program's parameter registers with tracked
- * matrices (if NV program). This only needs to be done per
- * glBegin/glEnd, not per-vertex.
+ * Unmap the texture images which were used by the vertex program (if any).
*/
-void
-_mesa_load_tracked_matrices(GLcontext *ctx)
+static void
+unmap_textures(GLcontext *ctx, const struct gl_vertex_program *vp)
{
- GLuint i;
+ GLuint u;
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
- /* point 'mat' at source matrix */
- GLmatrix *mat;
- if (ctx->VertexProgram.TrackMatrix[i] == GL_MODELVIEW) {
- mat = ctx->ModelviewMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_PROJECTION) {
- mat = ctx->ProjectionMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_TEXTURE) {
- mat = ctx->TextureMatrixStack[ctx->Texture.CurrentUnit].Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_COLOR) {
- mat = ctx->ColorMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i]==GL_MODELVIEW_PROJECTION_NV) {
- /* XXX verify the combined matrix is up to date */
- mat = &ctx->_ModelProjectMatrix;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] >= GL_MATRIX0_NV &&
- ctx->VertexProgram.TrackMatrix[i] <= GL_MATRIX7_NV) {
- GLuint n = ctx->VertexProgram.TrackMatrix[i] - GL_MATRIX0_NV;
- ASSERT(n < MAX_PROGRAM_MATRICES);
- mat = ctx->ProgramMatrixStack[n].Top;
- }
- else {
- /* no matrix is tracked, but we leave the register values as-is */
- assert(ctx->VertexProgram.TrackMatrix[i] == GL_NONE);
- continue;
- }
+ if (!ctx->Driver.MapTexture)
+ return;
- /* load the matrix values into sequential registers */
- if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_IDENTITY_NV) {
- load_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
- }
- else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_INVERSE_NV) {
- _math_matrix_analyse(mat); /* update the inverse */
- ASSERT(!_math_matrix_is_dirty(mat));
- load_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
- }
- else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_TRANSPOSE_NV) {
- load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
- }
- else {
- assert(ctx->VertexProgram.TrackMatrixTransform[i]
- == GL_INVERSE_TRANSPOSE_NV);
- _math_matrix_analyse(mat); /* update the inverse */
- ASSERT(!_math_matrix_is_dirty(mat));
- load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
+ for (u = 0; u < ctx->Const.MaxVertexTextureImageUnits; u++) {
+ if (vp->Base.TexturesUsed[u]) {
+ /* Note: _Current *should* correspond to the target indicated
+ * in TexturesUsed[u].
+ */
+ ctx->Driver.UnmapTexture(ctx, ctx->Texture.Unit[u]._Current);
}
}
}
GLuint outputs[VERT_RESULT_MAX], numOutputs;
GLuint i, j;
-#define FORCE_PROG_EXECUTE_C 1
-#if FORCE_PROG_EXECUTE_C
if (!program)
return GL_TRUE;
-#else
- if (!program || !program->IsNVProgram)
- return GL_TRUE;
-#endif
- if (ctx->VertexProgram.Current->IsNVProgram) {
+ if (program->IsNVProgram) {
_mesa_load_tracked_matrices(ctx);
}
else {
+ /* ARB program or vertex shader */
_mesa_load_state_parameters(ctx, program->Base.Parameters);
}
+ /* make list of outputs to save some time below */
numOutputs = 0;
for (i = 0; i < VERT_RESULT_MAX; i++) {
if (program->Base.OutputsWritten & (1 << i)) {
}
}
+ map_textures(ctx, program);
+
for (i = 0; i < VB->Count; i++) {
GLuint attr;
/* execute the program */
_mesa_execute_program(ctx, &program->Base, &machine);
- /* Fixup fog an point size results if needed */
- if (ctx->Fog.Enabled &&
- (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) {
- machine.Outputs[VERT_RESULT_FOGC][0] = 1.0;
- }
-
- if (ctx->VertexProgram.PointSizeEnabled &&
- (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) {
- machine.Outputs[VERT_RESULT_PSIZ][0] = ctx->Point.Size;
- }
-
/* copy the output registers into the VB->attribs arrays */
for (j = 0; j < numOutputs; j++) {
const GLuint attr = outputs[j];
#endif
}
- /* Setup the VB pointers so that the next pipeline stages get
- * their data from the right place (the program output arrays).
- */
- VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
- VB->ClipPtr->size = 4;
- VB->ClipPtr->count = VB->Count;
+ unmap_textures(ctx, program);
+
+ /* Fixup fog and point size results if needed */
+ if (program->IsNVProgram) {
+ if (ctx->Fog.Enabled &&
+ (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) {
+ for (i = 0; i < VB->Count; i++) {
+ store->results[VERT_RESULT_FOGC].data[i][0] = 1.0;
+ }
+ }
+
+ if (ctx->VertexProgram.PointSizeEnabled &&
+ (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) {
+ for (i = 0; i < VB->Count; i++) {
+ store->results[VERT_RESULT_PSIZ].data[i][0] = ctx->Point.Size;
+ }
+ }
+ }
+
+ if (program->IsPositionInvariant) {
+ /* We need the exact same transform as in the fixed function path here
+ * to guarantee invariance, depending on compiler optimization flags
+ * results could be different otherwise.
+ */
+ VB->ClipPtr = TransformRaw( &store->results[0],
+ &ctx->_ModelProjectMatrix,
+ VB->AttribPtr[0] );
+
+ /* Drivers expect this to be clean to element 4...
+ */
+ switch (VB->ClipPtr->size) {
+ case 1:
+ /* impossible */
+ case 2:
+ _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
+ /* fall-through */
+ case 3:
+ _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
+ /* fall-through */
+ case 4:
+ break;
+ }
+ }
+ else {
+ /* Setup the VB pointers so that the next pipeline stages get
+ * their data from the right place (the program output arrays).
+ */
+ VB->ClipPtr = &store->results[VERT_RESULT_HPOS];
+ VB->ClipPtr->size = 4;
+ VB->ClipPtr->count = VB->Count;
+ }
+
VB->ColorPtr[0] = &store->results[VERT_RESULT_COL0];
VB->ColorPtr[1] = &store->results[VERT_RESULT_BFC0];
VB->SecondaryColorPtr[0] = &store->results[VERT_RESULT_COL1];
}
}
- /* Cliptest and perspective divide. Clip functions must clear
- * the clipmask.
- */
- store->ormask = 0;
- store->andmask = CLIP_FRUSTUM_BITS;
- if (tnl->NeedNdcCoords) {
- VB->NdcPtr =
- _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
- &store->ndcCoords,
- store->clipmask,
- &store->ormask,
- &store->andmask );
- }
- else {
- VB->NdcPtr = NULL;
- _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
- NULL,
- store->clipmask,
- &store->ormask,
- &store->andmask );
- }
-
- if (store->andmask) /* All vertices are outside the frustum */
- return GL_FALSE;
-
-
- /* This is where we'd do clip testing against the user-defined
- * clipping planes, but they're not supported by vertex programs.
+ /* Perform NDC and cliptest operations:
*/
-
- VB->ClipOrMask = store->ormask;
- VB->ClipMask = store->clipmask;
-
- return GL_TRUE;
+ return do_ndc_cliptest(ctx, store);
}
* 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_vp( GLcontext *ctx,
- struct tnl_pipeline_stage *stage )
+static GLboolean
+init_vp(GLcontext *ctx, struct tnl_pipeline_stage *stage)
{
TNLcontext *tnl = TNL_CONTEXT(ctx);
struct vertex_buffer *VB = &(tnl->vb);
/**
* Destructor for this pipeline stage.
*/
-static void dtr( struct tnl_pipeline_stage *stage )
+static void
+dtr(struct tnl_pipeline_stage *stage)
{
struct vp_stage_data *store = VP_STAGE_DATA(stage);
}
+static void
+validate_vp_stage(GLcontext *ctx, struct tnl_pipeline_stage *stage)
+{
+ if (ctx->VertexProgram._Current) {
+ _swrast_update_texture_samplers(ctx);
+ }
+}
+
+
+
/**
* Public description of this pipeline stage.
*/
NULL, /* private_data */
init_vp, /* create */
dtr, /* destroy */
- NULL, /* validate */
+ validate_vp_stage, /* validate */
run_vp /* run -- initially set to ctr */
};
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