/**
* Generate code to sample a mipmap level with nearest filtering.
+ * If sampling a cube texture, r = cube face in [0,5].
*/
static void
lp_build_sample_image_nearest(struct lp_build_sample_context *bld,
bld->static_state->wrap_r);
lp_build_name(z, "tex.z.wrapped");
}
+ else if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
+ z = r;
+ }
else {
z = NULL;
}
/**
* Generate code to sample a mipmap level with linear filtering.
- * 1D, 2D and 3D images are suppored.
+ * If sampling a cube texture, r = cube face in [0,5].
*/
static void
lp_build_sample_image_linear(struct lp_build_sample_context *bld,
lp_build_name(z0, "tex.z0.wrapped");
lp_build_name(z1, "tex.z1.wrapped");
}
+ else if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
+ z0 = z1 = r; /* cube face */
+ r_fpart = NULL;
+ }
else {
- z0 = z1 = r_fpart = NULL;
+ z0 = z1 = NULL;
+ r_fpart = NULL;
}
}
else {
}
+/** Helper used by lp_build_cube_lookup() */
+static LLVMValueRef
+lp_build_cube_ima(struct lp_build_context *coord_bld, LLVMValueRef coord)
+{
+ /* ima = -0.5 / abs(coord); */
+ LLVMValueRef negHalf = lp_build_const_scalar(coord_bld->type, -0.5);
+ LLVMValueRef absCoord = lp_build_abs(coord_bld, coord);
+ LLVMValueRef ima = lp_build_mul(coord_bld, negHalf,
+ lp_build_rcp(coord_bld, absCoord));
+ return ima;
+}
+
+
+/**
+ * Helper used by lp_build_cube_lookup()
+ * \param sign scalar +1 or -1
+ * \param coord float vector
+ * \param ima float vector
+ */
+static LLVMValueRef
+lp_build_cube_coord(struct lp_build_context *coord_bld,
+ LLVMValueRef sign, int negate_coord,
+ LLVMValueRef coord, LLVMValueRef ima)
+{
+ /* return negate(coord) * ima * sign + 0.5; */
+ LLVMValueRef half = lp_build_const_scalar(coord_bld->type, 0.5);
+ LLVMValueRef res;
+
+ assert(negate_coord == +1 || negate_coord == -1);
+
+ if (negate_coord == -1) {
+ coord = lp_build_negate(coord_bld, coord);
+ }
+
+ res = lp_build_mul(coord_bld, coord, ima);
+ if (sign) {
+ sign = lp_build_broadcast_scalar(coord_bld, sign);
+ res = lp_build_mul(coord_bld, res, sign);
+ }
+ res = lp_build_add(coord_bld, res, half);
+
+ return res;
+}
+
+
+/** Helper used by lp_build_cube_lookup()
+ * Return (major_coord >= 0) ? pos_face : neg_face;
+ */
+static LLVMValueRef
+lp_build_cube_face(struct lp_build_sample_context *bld,
+ LLVMValueRef major_coord,
+ unsigned pos_face, unsigned neg_face)
+{
+ LLVMValueRef cmp = LLVMBuildFCmp(bld->builder, LLVMRealUGE,
+ major_coord,
+ bld->float_bld.zero, "");
+ LLVMValueRef pos = LLVMConstInt(LLVMInt32Type(), pos_face, 0);
+ LLVMValueRef neg = LLVMConstInt(LLVMInt32Type(), neg_face, 0);
+ LLVMValueRef res = LLVMBuildSelect(bld->builder, cmp, pos, neg, "");
+ return res;
+}
+
+
+
/**
* Generate code to do cube face selection and per-face texcoords.
*/
LLVMValueRef *face_s,
LLVMValueRef *face_t)
{
-#if 0
struct lp_build_context *float_bld = &bld->float_bld;
+ struct lp_build_context *coord_bld = &bld->coord_bld;
LLVMValueRef rx, ry, rz;
LLVMValueRef arx, ary, arz;
- LLVMValueRef sc, tc, ma;
LLVMValueRef c25 = LLVMConstReal(LLVMFloatType(), 0.25);
LLVMValueRef arx_ge_ary, arx_ge_arz;
LLVMValueRef ary_ge_arx, ary_ge_arz;
{
struct lp_build_flow_context *flow_ctx;
- struct lp_build_if_state if_ctx, if2_ctx;
+ struct lp_build_if_state if_ctx;
flow_ctx = lp_build_flow_create(bld->builder);
+ lp_build_flow_scope_begin(flow_ctx);
+
+ *face_s = bld->coord_bld.undef;
+ *face_t = bld->coord_bld.undef;
+ *face = bld->int_bld.undef;
+
+ lp_build_name(*face_s, "face_s");
+ lp_build_name(*face_t, "face_t");
+ lp_build_name(*face, "face");
+
+ lp_build_flow_scope_declare(flow_ctx, face_s);
+ lp_build_flow_scope_declare(flow_ctx, face_t);
+ lp_build_flow_scope_declare(flow_ctx, face);
lp_build_if(&if_ctx, flow_ctx, bld->builder, arx_ge_ary_arz);
{
-#if 0
- lp_build_if(&if2_ctx, flow_ctx, bld->builder, rx_pos);
- {
- /* Positive X face */
- }
- lp_build_else(&if2_ctx);
- {
- /* Negative X face */
- }
- lp_build_endif(&if2_ctx);
-#endif
+ /* +/- X face */
+ LLVMValueRef sign = lp_build_sgn(float_bld, rx);
+ LLVMValueRef ima = lp_build_cube_ima(coord_bld, s);
+ *face_s = lp_build_cube_coord(coord_bld, sign, +1, r, ima);
+ *face_t = lp_build_cube_coord(coord_bld, NULL, +1, t, ima);
+ *face = lp_build_cube_face(bld, rx,
+ PIPE_TEX_FACE_POS_X,
+ PIPE_TEX_FACE_NEG_X);
}
lp_build_else(&if_ctx);
{
+ struct lp_build_flow_context *flow_ctx2;
+ struct lp_build_if_state if_ctx2;
+
+ LLVMValueRef face_s2 = bld->coord_bld.undef;
+ LLVMValueRef face_t2 = bld->coord_bld.undef;
+ LLVMValueRef face2 = bld->int_bld.undef;
+ flow_ctx2 = lp_build_flow_create(bld->builder);
+ lp_build_flow_scope_begin(flow_ctx2);
+ lp_build_flow_scope_declare(flow_ctx2, &face_s2);
+ lp_build_flow_scope_declare(flow_ctx2, &face_t2);
+ lp_build_flow_scope_declare(flow_ctx2, &face2);
+ ary_ge_arx_arz = LLVMBuildAnd(bld->builder, ary_ge_arx, ary_ge_arz, "");
+
+ lp_build_if(&if_ctx2, flow_ctx2, bld->builder, ary_ge_arx_arz);
+ {
+ /* +/- Y face */
+ LLVMValueRef sign = lp_build_sgn(float_bld, ry);
+ LLVMValueRef ima = lp_build_cube_ima(coord_bld, t);
+ face_s2 = lp_build_cube_coord(coord_bld, NULL, -1, s, ima);
+ face_t2 = lp_build_cube_coord(coord_bld, sign, -1, r, ima);
+ face2 = lp_build_cube_face(bld, ry,
+ PIPE_TEX_FACE_POS_Y,
+ PIPE_TEX_FACE_NEG_Y);
+ }
+ lp_build_else(&if_ctx2);
+ {
+ /* +/- Z face */
+ LLVMValueRef sign = lp_build_sgn(float_bld, rz);
+ LLVMValueRef ima = lp_build_cube_ima(coord_bld, r);
+ face_s2 = lp_build_cube_coord(coord_bld, sign, -1, s, ima);
+ face_t2 = lp_build_cube_coord(coord_bld, NULL, +1, t, ima);
+ face2 = lp_build_cube_face(bld, rz,
+ PIPE_TEX_FACE_POS_Z,
+ PIPE_TEX_FACE_NEG_Z);
+ }
+ lp_build_endif(&if_ctx2);
+ lp_build_flow_scope_end(flow_ctx2);
+ lp_build_flow_destroy(flow_ctx2);
+
+ *face_s = face_s2;
+ *face_t = face_t2;
+ *face = face2;
}
- lp_build_endif(&if_ctx);
+ lp_build_endif(&if_ctx);
+ lp_build_flow_scope_end(flow_ctx);
lp_build_flow_destroy(flow_ctx);
}
-#endif
}
height0_vec = lp_build_minify(bld, height_vec, ilevel0_vec);
row_stride0_vec = lp_build_get_level_stride_vec(bld, row_stride_array,
ilevel0);
- if (dims == 3) {
- depth0_vec = lp_build_minify(bld, depth_vec, ilevel0_vec);
+ if (dims == 3 || bld->static_state->target == PIPE_TEXTURE_CUBE) {
img_stride0_vec = lp_build_mul(&bld->int_coord_bld,
row_stride0_vec, height0_vec);
+ if (dims == 3) {
+ depth0_vec = lp_build_minify(bld, depth_vec, ilevel0_vec);
+ }
}
}
if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
height1_vec = lp_build_minify(bld, height_vec, ilevel1_vec);
row_stride1_vec = lp_build_get_level_stride_vec(bld, row_stride_array,
ilevel1);
- if (dims == 3) {
- depth1_vec = lp_build_minify(bld, depth_vec, ilevel1_vec);
+ if (dims == 3 || bld->static_state->target == PIPE_TEXTURE_CUBE) {
img_stride1_vec = lp_build_mul(&bld->int_coord_bld,
row_stride1_vec, height1_vec);
+ if (dims ==3) {
+ depth1_vec = lp_build_minify(bld, depth_vec, ilevel1_vec);
+ }
}
}
}
if (bld->static_state->target == PIPE_TEXTURE_CUBE) {
LLVMValueRef face, face_s, face_t;
lp_build_cube_lookup(bld, s, t, r, &face, &face_s, &face_t);
+ s = face_s; /* vec */
+ t = face_t; /* vec */
+ /* use 'r' to indicate cube face */
+ r = lp_build_broadcast_scalar(&bld->int_coord_bld, face); /* vec */
}
/*
projects / mesa.git / commitdiff