#include "lp_bld_logic.h"
#include "lp_bld_swizzle.h"
#include "lp_bld_pack.h"
+#include "lp_bld_flow.h"
#include "lp_bld_format.h"
#include "lp_bld_sample.h"
const struct util_format_description *format_desc;
+ /** regular scalar float type */
+ struct lp_type float_type;
+ struct lp_build_context float_bld;
+
+ /** regular scalar float type */
+ struct lp_type int_type;
+ struct lp_build_context int_bld;
+
/** Incoming coordinates type and build context */
struct lp_type coord_type;
struct lp_build_context coord_bld;
}
+static LLVMValueRef
+lp_build_get_mipmap_level(struct lp_build_sample_context *bld,
+ LLVMValueRef data_array, LLVMValueRef level)
+{
+ LLVMValueRef indexes[2], data_ptr;
+ indexes[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
+ indexes[1] = level;
+ data_ptr = LLVMBuildGEP(bld->builder, data_array, indexes, 2, "");
+ data_ptr = LLVMBuildLoad(bld->builder, data_ptr, "");
+ return data_ptr;
+}
+
+
+static LLVMValueRef
+lp_build_get_const_mipmap_level(struct lp_build_sample_context *bld,
+ LLVMValueRef data_array, int level)
+{
+ LLVMValueRef lvl = LLVMConstInt(LLVMInt32Type(), level, 0);
+ return lp_build_get_mipmap_level(bld, data_array, lvl);
+}
+
+
+/**
+ * Dereference stride_array[mipmap_level] array to get a stride.
+ * Return stride as a vector.
+ */
+static LLVMValueRef
+lp_build_get_level_stride_vec(struct lp_build_sample_context *bld,
+ LLVMValueRef stride_array, LLVMValueRef level)
+{
+ LLVMValueRef indexes[2], stride;
+ indexes[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
+ indexes[1] = level;
+ stride = LLVMBuildGEP(bld->builder, stride_array, indexes, 2, "");
+ stride = LLVMBuildLoad(bld->builder, stride, "");
+ stride = lp_build_broadcast_scalar(&bld->int_coord_bld, stride);
+ return stride;
+}
+
+
+/** Dereference stride_array[0] array to get a stride (as vector). */
+static LLVMValueRef
+lp_build_get_const_level_stride_vec(struct lp_build_sample_context *bld,
+ LLVMValueRef stride_array, int level)
+{
+ LLVMValueRef lvl = LLVMConstInt(LLVMInt32Type(), level, 0);
+ return lp_build_get_level_stride_vec(bld, stride_array, lvl);
+}
+
+
+static int
+texture_dims(enum pipe_texture_target tex)
+{
+ switch (tex) {
+ case PIPE_TEXTURE_1D:
+ return 1;
+ case PIPE_TEXTURE_2D:
+ case PIPE_TEXTURE_CUBE:
+ return 2;
+ case PIPE_TEXTURE_3D:
+ return 3;
+ default:
+ assert(0 && "bad texture target in texture_dims()");
+ return 2;
+ }
+}
+
+
/**
- * Gen code to fetch a texel from a texture at int coords (x, y).
+ * Generate code to fetch a texel from a texture at int coords (x, y, z).
+ * The computation depends on whether the texture is 1D, 2D or 3D.
* The result, texel, will be:
* texel[0] = red values
* texel[1] = green values
lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
LLVMValueRef width,
LLVMValueRef height,
+ LLVMValueRef depth,
LLVMValueRef x,
LLVMValueRef y,
+ LLVMValueRef z,
LLVMValueRef y_stride,
- LLVMValueRef data_array,
+ LLVMValueRef z_stride,
+ LLVMValueRef data_ptr,
LLVMValueRef *texel)
{
+ const int dims = texture_dims(bld->static_state->target);
struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
LLVMValueRef offset;
- LLVMValueRef packed;
+ LLVMValueRef i, j;
LLVMValueRef use_border = NULL;
- LLVMValueRef data_ptr;
/* use_border = x < 0 || x >= width || y < 0 || y >= height */
if (wrap_mode_uses_border_color(bld->static_state->wrap_s)) {
use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
}
- if (wrap_mode_uses_border_color(bld->static_state->wrap_t)) {
+ if (dims >= 2 && wrap_mode_uses_border_color(bld->static_state->wrap_t)) {
LLVMValueRef b1, b2;
b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, y, int_coord_bld->zero);
b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, y, height);
}
}
- /* XXX always use mipmap level 0 for now */
- {
- const int level = 0;
- LLVMValueRef indexes[2];
- indexes[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
- indexes[1] = LLVMConstInt(LLVMInt32Type(), level, 0);
- data_ptr = LLVMBuildGEP(bld->builder, data_array, indexes, 2, "");
- data_ptr = LLVMBuildLoad(bld->builder, data_ptr, "");
+ if (dims == 3 && wrap_mode_uses_border_color(bld->static_state->wrap_r)) {
+ LLVMValueRef b1, b2;
+ b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, z, int_coord_bld->zero);
+ b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, z, depth);
+ if (use_border) {
+ use_border = LLVMBuildOr(bld->builder, use_border, b1, "ub_or_b1");
+ use_border = LLVMBuildOr(bld->builder, use_border, b2, "ub_or_b2");
+ }
+ else {
+ use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
+ }
+ }
+
+ /*
+ * Describe the coordinates in terms of pixel blocks.
+ *
+ * TODO: pixel blocks are power of two. LLVM should convert rem/div to
+ * bit arithmetic. Verify this.
+ */
+
+ if (bld->format_desc->block.width == 1) {
+ i = bld->uint_coord_bld.zero;
+ }
+ else {
+ LLVMValueRef block_width = lp_build_const_int_vec(bld->uint_coord_bld.type, bld->format_desc->block.width);
+ i = LLVMBuildURem(bld->builder, x, block_width, "");
+ x = LLVMBuildUDiv(bld->builder, x, block_width, "");
}
+ if (bld->format_desc->block.height == 1) {
+ j = bld->uint_coord_bld.zero;
+ }
+ else {
+ LLVMValueRef block_height = lp_build_const_int_vec(bld->uint_coord_bld.type, bld->format_desc->block.height);
+ j = LLVMBuildURem(bld->builder, y, block_height, "");
+ y = LLVMBuildUDiv(bld->builder, y, block_height, "");
+ }
+
+ /* convert x,y,z coords to linear offset from start of texture, in bytes */
+ offset = lp_build_sample_offset(&bld->uint_coord_bld,
+ bld->format_desc,
+ x, y, z, y_stride, z_stride);
+
+ lp_build_fetch_rgba_soa(bld->builder,
+ bld->format_desc,
+ bld->texel_type,
+ data_ptr, offset,
+ i, j,
+ texel);
+
/*
* Note: if we find an app which frequently samples the texture border
* we might want to implement a true conditional here to avoid sampling
* the texel color results with the border color.
*/
- /* convert x,y coords to linear offset from start of texture, in bytes */
- offset = lp_build_sample_offset(&bld->uint_coord_bld,
- bld->format_desc,
- x, y, y_stride);
-
- assert(bld->format_desc->block.width == 1);
- assert(bld->format_desc->block.height == 1);
- assert(bld->format_desc->block.bits <= bld->texel_type.width);
-
- /* gather the texels from the texture */
- packed = lp_build_gather(bld->builder,
- bld->texel_type.length,
- bld->format_desc->block.bits,
- bld->texel_type.width,
- data_ptr, offset);
-
- /* convert texels to float rgba */
- lp_build_unpack_rgba_soa(bld->builder,
- bld->format_desc,
- bld->texel_type,
- packed, texel);
-
if (use_border) {
/* select texel color or border color depending on use_border */
int chan;
for (chan = 0; chan < 4; chan++) {
LLVMValueRef border_chan =
- lp_build_const_scalar(bld->texel_type,
+ lp_build_const_vec(bld->texel_type,
bld->static_state->border_color[chan]);
texel[chan] = lp_build_select(&bld->texel_bld, use_border,
border_chan, texel[chan]);
offset = lp_build_sample_offset(&bld->uint_coord_bld,
bld->format_desc,
- x, y, y_stride);
+ x, y, NULL, y_stride, NULL);
assert(bld->format_desc->block.width == 1);
assert(bld->format_desc->block.height == 1);
assert(bld->format_desc->block.bits <= bld->texel_type.width);
- /* XXX always use mipmap level 0 for now */
- {
- const int level = 0;
- LLVMValueRef indexes[2];
- /* get data_ptr[level] */
- indexes[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
- indexes[1] = LLVMConstInt(LLVMInt32Type(), level, 0);
- data_ptr = LLVMBuildGEP(bld->builder, data_array, indexes, 2, "");
- /* load texture base address */
- data_ptr = LLVMBuildLoad(bld->builder, data_ptr, "");
- }
+ /* get pointer to mipmap level 0 data */
+ data_ptr = lp_build_get_const_mipmap_level(bld, data_array, 0);
return lp_build_gather(bld->builder,
bld->texel_type.length,
struct lp_build_context *coord_bld = &bld->coord_bld;
struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld;
- LLVMValueRef two = lp_build_const_scalar(coord_bld->type, 2.0);
- LLVMValueRef half = lp_build_const_scalar(coord_bld->type, 0.5);
+ LLVMValueRef two = lp_build_const_vec(coord_bld->type, 2.0);
+ LLVMValueRef half = lp_build_const_vec(coord_bld->type, 0.5);
LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length);
LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one);
LLVMValueRef length_f_minus_one = lp_build_sub(coord_bld, length_f, coord_bld->one);
else {
LLVMValueRef min, max;
/* clamp to [0.5, length - 0.5] */
- min = lp_build_const_scalar(coord_bld->type, 0.5F);
+ min = lp_build_const_vec(coord_bld->type, 0.5F);
max = lp_build_sub(coord_bld, length_f, min);
coord = lp_build_clamp(coord_bld, coord, min, max);
}
if (bld->static_state->normalized_coords) {
/* min = -1.0 / (2 * length) = -0.5 / length */
min = lp_build_mul(coord_bld,
- lp_build_const_scalar(coord_bld->type, -0.5F),
+ lp_build_const_vec(coord_bld->type, -0.5F),
lp_build_rcp(coord_bld, length_f));
/* max = 1.0 - min */
max = lp_build_sub(coord_bld, coord_bld->one, min);
}
else {
/* clamp to [-0.5, length + 0.5] */
- min = lp_build_const_scalar(coord_bld->type, -0.5F);
+ min = lp_build_const_vec(coord_bld->type, -0.5F);
max = lp_build_sub(coord_bld, length_f, min);
coord = lp_build_clamp(coord_bld, coord, min, max);
coord = lp_build_sub(coord_bld, coord, half);
LLVMValueRef min, max;
/* min = -1.0 / (2 * length) = -0.5 / length */
min = lp_build_mul(coord_bld,
- lp_build_const_scalar(coord_bld->type, -0.5F),
+ lp_build_const_vec(coord_bld->type, -0.5F),
lp_build_rcp(coord_bld, length_f));
/* max = 1.0 - min */
max = lp_build_sub(coord_bld, coord_bld->one, min);
struct lp_build_context *coord_bld = &bld->coord_bld;
struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
struct lp_build_context *uint_coord_bld = &bld->uint_coord_bld;
- LLVMValueRef two = lp_build_const_scalar(coord_bld->type, 2.0);
+ LLVMValueRef two = lp_build_const_vec(coord_bld->type, 2.0);
LLVMValueRef length_f = lp_build_int_to_float(coord_bld, length);
LLVMValueRef length_minus_one = lp_build_sub(uint_coord_bld, length, uint_coord_bld->one);
LLVMValueRef length_f_minus_one = lp_build_sub(coord_bld, length_f, coord_bld->one);
}
else {
/* clamp to [0.5, length - 0.5] */
- min = lp_build_const_scalar(coord_bld->type, 0.5F);
+ min = lp_build_const_vec(coord_bld->type, 0.5F);
max = lp_build_sub(coord_bld, length_f, min);
}
/* coord = clamp(coord, min, max) */
if (bld->static_state->normalized_coords) {
/* min = -1.0 / (2 * length) = -0.5 / length */
min = lp_build_mul(coord_bld,
- lp_build_const_scalar(coord_bld->type, -0.5F),
+ lp_build_const_vec(coord_bld->type, -0.5F),
lp_build_rcp(coord_bld, length_f));
/* max = length - min */
max = lp_build_sub(coord_bld, length_f, min);
}
else {
/* clamp to [-0.5, length + 0.5] */
- min = lp_build_const_scalar(coord_bld->type, -0.5F);
+ min = lp_build_const_vec(coord_bld->type, -0.5F);
max = lp_build_sub(coord_bld, length_f, min);
}
/* coord = clamp(coord, min, max) */
/**
- * Sample 2D texture with nearest filtering.
+ * Codegen equivalent for u_minify().
+ * Return max(1, base_size >> level);
+ */
+static LLVMValueRef
+lp_build_minify(struct lp_build_sample_context *bld,
+ LLVMValueRef base_size,
+ LLVMValueRef level)
+{
+ LLVMValueRef size = LLVMBuildAShr(bld->builder, base_size, level, "minify");
+ size = lp_build_max(&bld->int_coord_bld, size, bld->int_coord_bld.one);
+ return size;
+}
+
+
+/**
+ * Generate code to compute texture level of detail (lambda).
+ * \param s vector of texcoord s values
+ * \param t vector of texcoord t values
+ * \param r vector of texcoord r values
+ * \param width scalar int texture width
+ * \param height scalar int texture height
+ * \param depth scalar int texture depth
+ */
+static LLVMValueRef
+lp_build_lod_selector(struct lp_build_sample_context *bld,
+ LLVMValueRef s,
+ LLVMValueRef t,
+ LLVMValueRef r,
+ LLVMValueRef width,
+ LLVMValueRef height,
+ LLVMValueRef depth)
+
+{
+ if (bld->static_state->min_lod == bld->static_state->max_lod) {
+ /* User is forcing sampling from a particular mipmap level.
+ * This is hit during mipmap generation.
+ */
+ return LLVMConstReal(LLVMFloatType(), bld->static_state->min_lod);
+ }
+ else {
+ const int dims = texture_dims(bld->static_state->target);
+ struct lp_build_context *float_bld = &bld->float_bld;
+ LLVMValueRef lod_bias = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->lod_bias);
+ LLVMValueRef min_lod = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->min_lod);
+ LLVMValueRef max_lod = LLVMConstReal(LLVMFloatType(),
+ bld->static_state->max_lod);
+
+ LLVMValueRef index0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
+ LLVMValueRef index1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
+ LLVMValueRef index2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
+
+ LLVMValueRef s0, s1, s2;
+ LLVMValueRef t0, t1, t2;
+ LLVMValueRef r0, r1, r2;
+ LLVMValueRef dsdx, dsdy, dtdx, dtdy, drdx, drdy;
+ LLVMValueRef rho, lod;
+
+ /*
+ * dsdx = abs(s[1] - s[0]);
+ * dsdy = abs(s[2] - s[0]);
+ * dtdx = abs(t[1] - t[0]);
+ * dtdy = abs(t[2] - t[0]);
+ * drdx = abs(r[1] - r[0]);
+ * drdy = abs(r[2] - r[0]);
+ * XXX we're assuming a four-element quad in 2x2 layout here.
+ */
+ s0 = LLVMBuildExtractElement(bld->builder, s, index0, "s0");
+ s1 = LLVMBuildExtractElement(bld->builder, s, index1, "s1");
+ s2 = LLVMBuildExtractElement(bld->builder, s, index2, "s2");
+ dsdx = LLVMBuildSub(bld->builder, s1, s0, "");
+ dsdx = lp_build_abs(float_bld, dsdx);
+ dsdy = LLVMBuildSub(bld->builder, s2, s0, "");
+ dsdy = lp_build_abs(float_bld, dsdy);
+ if (dims > 1) {
+ t0 = LLVMBuildExtractElement(bld->builder, t, index0, "t0");
+ t1 = LLVMBuildExtractElement(bld->builder, t, index1, "t1");
+ t2 = LLVMBuildExtractElement(bld->builder, t, index2, "t2");
+ dtdx = LLVMBuildSub(bld->builder, t1, t0, "");
+ dtdx = lp_build_abs(float_bld, dtdx);
+ dtdy = LLVMBuildSub(bld->builder, t2, t0, "");
+ dtdy = lp_build_abs(float_bld, dtdy);
+ if (dims > 2) {
+ r0 = LLVMBuildExtractElement(bld->builder, r, index0, "r0");
+ r1 = LLVMBuildExtractElement(bld->builder, r, index1, "r1");
+ r2 = LLVMBuildExtractElement(bld->builder, r, index2, "r2");
+ drdx = LLVMBuildSub(bld->builder, r1, r0, "");
+ drdx = lp_build_abs(float_bld, drdx);
+ drdy = LLVMBuildSub(bld->builder, r2, r0, "");
+ drdy = lp_build_abs(float_bld, drdy);
+ }
+ }
+
+ /* Compute rho = max of all partial derivatives scaled by texture size.
+ * XXX this could be vectorized somewhat
+ */
+ rho = LLVMBuildMul(bld->builder,
+ lp_build_max(float_bld, dsdx, dsdy),
+ lp_build_int_to_float(float_bld, width), "");
+ if (dims > 1) {
+ LLVMValueRef max;
+ max = LLVMBuildMul(bld->builder,
+ lp_build_max(float_bld, dtdx, dtdy),
+ lp_build_int_to_float(float_bld, height), "");
+ rho = lp_build_max(float_bld, rho, max);
+ if (dims > 2) {
+ max = LLVMBuildMul(bld->builder,
+ lp_build_max(float_bld, drdx, drdy),
+ lp_build_int_to_float(float_bld, depth), "");
+ rho = lp_build_max(float_bld, rho, max);
+ }
+ }
+
+ /* compute lod = log2(rho) */
+ lod = lp_build_log2(float_bld, rho);
+
+ /* add lod bias */
+ lod = LLVMBuildAdd(bld->builder, lod, lod_bias, "LOD bias");
+
+ /* clamp lod */
+ lod = lp_build_clamp(float_bld, lod, min_lod, max_lod);
+
+ return lod;
+ }
+}
+
+
+/**
+ * For PIPE_TEX_MIPFILTER_NEAREST, convert float LOD to integer
+ * mipmap level index.
+ * Note: this is all scalar code.
+ * \param lod scalar float texture level of detail
+ * \param level_out returns integer
*/
static void
-lp_build_sample_2d_nearest_soa(struct lp_build_sample_context *bld,
- LLVMValueRef s,
- LLVMValueRef t,
- LLVMValueRef width,
- LLVMValueRef height,
- LLVMValueRef stride,
- LLVMValueRef data_array,
- LLVMValueRef *texel)
+lp_build_nearest_mip_level(struct lp_build_sample_context *bld,
+ unsigned unit,
+ LLVMValueRef lod,
+ LLVMValueRef *level_out)
{
- LLVMValueRef x, y;
+ struct lp_build_context *float_bld = &bld->float_bld;
+ struct lp_build_context *int_bld = &bld->int_bld;
+ LLVMValueRef last_level, level;
- x = lp_build_sample_wrap_nearest(bld, s, width,
- bld->static_state->pot_width,
- bld->static_state->wrap_s);
- y = lp_build_sample_wrap_nearest(bld, t, height,
- bld->static_state->pot_height,
- bld->static_state->wrap_t);
+ LLVMValueRef zero = LLVMConstInt(LLVMInt32Type(), 0, 0);
- lp_build_name(x, "tex.x.wrapped");
- lp_build_name(y, "tex.y.wrapped");
+ last_level = bld->dynamic_state->last_level(bld->dynamic_state,
+ bld->builder, unit);
+
+ /* convert float lod to integer */
+ level = lp_build_iround(float_bld, lod);
+
+ /* clamp level to legal range of levels */
+ *level_out = lp_build_clamp(int_bld, level, zero, last_level);
+}
+
+
+/**
+ * For PIPE_TEX_MIPFILTER_LINEAR, convert float LOD to integer to
+ * two (adjacent) mipmap level indexes. Later, we'll sample from those
+ * two mipmap levels and interpolate between them.
+ */
+static void
+lp_build_linear_mip_levels(struct lp_build_sample_context *bld,
+ unsigned unit,
+ LLVMValueRef lod,
+ LLVMValueRef *level0_out,
+ LLVMValueRef *level1_out,
+ LLVMValueRef *weight_out)
+{
+ struct lp_build_context *float_bld = &bld->float_bld;
+ struct lp_build_context *int_bld = &bld->int_bld;
+ LLVMValueRef last_level, level;
+
+ last_level = bld->dynamic_state->last_level(bld->dynamic_state,
+ bld->builder, unit);
+
+ /* convert float lod to integer */
+ level = lp_build_ifloor(float_bld, lod);
- lp_build_sample_texel_soa(bld, width, height, x, y, stride, data_array, texel);
+ /* compute level 0 and clamp to legal range of levels */
+ *level0_out = lp_build_clamp(int_bld, level,
+ int_bld->zero,
+ last_level);
+ /* compute level 1 and clamp to legal range of levels */
+ *level1_out = lp_build_add(int_bld, *level0_out, int_bld->one);
+ *level1_out = lp_build_min(int_bld, *level1_out, last_level);
+
+ *weight_out = lp_build_fract(float_bld, lod);
}
/**
- * Sample 2D texture with bilinear filtering.
+ * 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_2d_linear_soa(struct lp_build_sample_context *bld,
+lp_build_sample_image_nearest(struct lp_build_sample_context *bld,
+ LLVMValueRef width_vec,
+ LLVMValueRef height_vec,
+ LLVMValueRef depth_vec,
+ LLVMValueRef row_stride_vec,
+ LLVMValueRef img_stride_vec,
+ LLVMValueRef data_ptr,
LLVMValueRef s,
LLVMValueRef t,
- LLVMValueRef width,
- LLVMValueRef height,
- LLVMValueRef stride,
- LLVMValueRef data_array,
- LLVMValueRef *texel)
+ LLVMValueRef r,
+ LLVMValueRef colors_out[4])
{
- LLVMValueRef s_fpart;
- LLVMValueRef t_fpart;
- LLVMValueRef x0, x1;
- LLVMValueRef y0, y1;
+ const int dims = texture_dims(bld->static_state->target);
+ LLVMValueRef x, y, z;
+
+ /*
+ * Compute integer texcoords.
+ */
+ x = lp_build_sample_wrap_nearest(bld, s, width_vec,
+ bld->static_state->pot_width,
+ bld->static_state->wrap_s);
+ lp_build_name(x, "tex.x.wrapped");
+
+ if (dims >= 2) {
+ y = lp_build_sample_wrap_nearest(bld, t, height_vec,
+ bld->static_state->pot_height,
+ bld->static_state->wrap_t);
+ lp_build_name(y, "tex.y.wrapped");
+
+ if (dims == 3) {
+ z = lp_build_sample_wrap_nearest(bld, r, depth_vec,
+ bld->static_state->pot_height,
+ 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;
+ }
+ }
+ else {
+ y = z = NULL;
+ }
+
+ /*
+ * Get texture colors.
+ */
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x, y, z,
+ row_stride_vec, img_stride_vec,
+ data_ptr, colors_out);
+}
+
+
+/**
+ * Generate code to sample a mipmap level with linear filtering.
+ * If sampling a cube texture, r = cube face in [0,5].
+ */
+static void
+lp_build_sample_image_linear(struct lp_build_sample_context *bld,
+ LLVMValueRef width_vec,
+ LLVMValueRef height_vec,
+ LLVMValueRef depth_vec,
+ LLVMValueRef row_stride_vec,
+ LLVMValueRef img_stride_vec,
+ LLVMValueRef data_ptr,
+ LLVMValueRef s,
+ LLVMValueRef t,
+ LLVMValueRef r,
+ LLVMValueRef colors_out[4])
+{
+ const int dims = texture_dims(bld->static_state->target);
+ LLVMValueRef x0, y0, z0, x1, y1, z1;
+ LLVMValueRef s_fpart, t_fpart, r_fpart;
LLVMValueRef neighbors[2][2][4];
- unsigned chan;
+ int chan;
- lp_build_sample_wrap_linear(bld, s, width, bld->static_state->pot_width,
- bld->static_state->wrap_s, &x0, &x1, &s_fpart);
- lp_build_sample_wrap_linear(bld, t, height, bld->static_state->pot_height,
- bld->static_state->wrap_t, &y0, &y1, &t_fpart);
+ /*
+ * Compute integer texcoords.
+ */
+ lp_build_sample_wrap_linear(bld, s, width_vec,
+ bld->static_state->pot_width,
+ bld->static_state->wrap_s,
+ &x0, &x1, &s_fpart);
+ lp_build_name(x0, "tex.x0.wrapped");
+ lp_build_name(x1, "tex.x1.wrapped");
+
+ if (dims >= 2) {
+ lp_build_sample_wrap_linear(bld, t, height_vec,
+ bld->static_state->pot_height,
+ bld->static_state->wrap_t,
+ &y0, &y1, &t_fpart);
+ lp_build_name(y0, "tex.y0.wrapped");
+ lp_build_name(y1, "tex.y1.wrapped");
+
+ if (dims == 3) {
+ lp_build_sample_wrap_linear(bld, r, depth_vec,
+ bld->static_state->pot_depth,
+ bld->static_state->wrap_r,
+ &z0, &z1, &r_fpart);
+ 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 = NULL;
+ r_fpart = NULL;
+ }
+ }
+ else {
+ y0 = y1 = t_fpart = NULL;
+ z0 = z1 = r_fpart = NULL;
+ }
- lp_build_sample_texel_soa(bld, width, height, x0, y0, stride, data_array, neighbors[0][0]);
- lp_build_sample_texel_soa(bld, width, height, x1, y0, stride, data_array, neighbors[0][1]);
- lp_build_sample_texel_soa(bld, width, height, x0, y1, stride, data_array, neighbors[1][0]);
- lp_build_sample_texel_soa(bld, width, height, x1, y1, stride, data_array, neighbors[1][1]);
+ /*
+ * Get texture colors.
+ */
+ /* get x0/x1 texels */
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x0, y0, z0,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors[0][0]);
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x1, y0, z0,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors[0][1]);
+
+ if (dims == 1) {
+ /* Interpolate two samples from 1D image to produce one color */
+ for (chan = 0; chan < 4; chan++) {
+ colors_out[chan] = lp_build_lerp(&bld->texel_bld, s_fpart,
+ neighbors[0][0][chan],
+ neighbors[0][1][chan]);
+ }
+ }
+ else {
+ /* 2D/3D texture */
+ LLVMValueRef colors0[4];
+
+ /* get x0/x1 texels at y1 */
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x0, y1, z0,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors[1][0]);
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x1, y1, z0,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors[1][1]);
+
+ /* Bilinear interpolate the four samples from the 2D image / 3D slice */
+ for (chan = 0; chan < 4; chan++) {
+ colors0[chan] = lp_build_lerp_2d(&bld->texel_bld,
+ s_fpart, t_fpart,
+ neighbors[0][0][chan],
+ neighbors[0][1][chan],
+ neighbors[1][0][chan],
+ neighbors[1][1][chan]);
+ }
- /* TODO: Don't interpolate missing channels */
- for(chan = 0; chan < 4; ++chan) {
- texel[chan] = lp_build_lerp_2d(&bld->texel_bld,
- s_fpart, t_fpart,
- neighbors[0][0][chan],
- neighbors[0][1][chan],
- neighbors[1][0][chan],
- neighbors[1][1][chan]);
+ if (dims == 3) {
+ LLVMValueRef neighbors1[2][2][4];
+ LLVMValueRef colors1[4];
+
+ /* get x0/x1/y0/y1 texels at z1 */
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x0, y0, z1,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors1[0][0]);
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x1, y0, z1,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors1[0][1]);
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x0, y1, z1,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors1[1][0]);
+ lp_build_sample_texel_soa(bld, width_vec, height_vec, depth_vec,
+ x1, y1, z1,
+ row_stride_vec, img_stride_vec,
+ data_ptr, neighbors1[1][1]);
+
+ /* Bilinear interpolate the four samples from the second Z slice */
+ for (chan = 0; chan < 4; chan++) {
+ colors1[chan] = lp_build_lerp_2d(&bld->texel_bld,
+ s_fpart, t_fpart,
+ neighbors1[0][0][chan],
+ neighbors1[0][1][chan],
+ neighbors1[1][0][chan],
+ neighbors1[1][1][chan]);
+ }
+
+ /* Linearly interpolate the two samples from the two 3D slices */
+ for (chan = 0; chan < 4; chan++) {
+ colors_out[chan] = lp_build_lerp(&bld->texel_bld,
+ r_fpart,
+ colors0[chan], colors1[chan]);
+ }
+ }
+ else {
+ /* 2D tex */
+ for (chan = 0; chan < 4; chan++) {
+ colors_out[chan] = colors0[chan];
+ }
+ }
+ }
+}
+
+
+/** 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_vec(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_vec(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.
+ */
+static void
+lp_build_cube_lookup(struct lp_build_sample_context *bld,
+ LLVMValueRef s,
+ LLVMValueRef t,
+ LLVMValueRef r,
+ LLVMValueRef *face,
+ LLVMValueRef *face_s,
+ LLVMValueRef *face_t)
+{
+ 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 c25 = LLVMConstReal(LLVMFloatType(), 0.25);
+ LLVMValueRef arx_ge_ary, arx_ge_arz;
+ LLVMValueRef ary_ge_arx, ary_ge_arz;
+ LLVMValueRef arx_ge_ary_arz, ary_ge_arx_arz;
+ LLVMValueRef rx_pos, ry_pos, rz_pos;
+
+ assert(bld->coord_bld.type.length == 4);
+
+ /*
+ * Use the average of the four pixel's texcoords to choose the face.
+ */
+ rx = lp_build_mul(float_bld, c25,
+ lp_build_sum_vector(&bld->coord_bld, s));
+ ry = lp_build_mul(float_bld, c25,
+ lp_build_sum_vector(&bld->coord_bld, t));
+ rz = lp_build_mul(float_bld, c25,
+ lp_build_sum_vector(&bld->coord_bld, r));
+
+ arx = lp_build_abs(float_bld, rx);
+ ary = lp_build_abs(float_bld, ry);
+ arz = lp_build_abs(float_bld, rz);
+
+ /*
+ * Compare sign/magnitude of rx,ry,rz to determine face
+ */
+ arx_ge_ary = LLVMBuildFCmp(bld->builder, LLVMRealUGE, arx, ary, "");
+ arx_ge_arz = LLVMBuildFCmp(bld->builder, LLVMRealUGE, arx, arz, "");
+ ary_ge_arx = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ary, arx, "");
+ ary_ge_arz = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ary, arz, "");
+
+ arx_ge_ary_arz = LLVMBuildAnd(bld->builder, arx_ge_ary, arx_ge_arz, "");
+ ary_ge_arx_arz = LLVMBuildAnd(bld->builder, ary_ge_arx, ary_ge_arz, "");
+
+ rx_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, rx, float_bld->zero, "");
+ ry_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, ry, float_bld->zero, "");
+ rz_pos = LLVMBuildFCmp(bld->builder, LLVMRealUGE, rz, float_bld->zero, "");
+
+ {
+ struct lp_build_flow_context *flow_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);
+ {
+ /* +/- 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_flow_scope_end(flow_ctx);
+ lp_build_flow_destroy(flow_ctx);
+ }
+}
+
+
+
+/**
+ * Sample the texture/mipmap using given image filter and mip filter.
+ * data0_ptr and data1_ptr point to the two mipmap levels to sample
+ * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
+ * If we're using nearest miplevel sampling the '1' values will be null/unused.
+ */
+static void
+lp_build_sample_mipmap(struct lp_build_sample_context *bld,
+ unsigned img_filter,
+ unsigned mip_filter,
+ LLVMValueRef s,
+ LLVMValueRef t,
+ LLVMValueRef r,
+ LLVMValueRef lod_fpart,
+ LLVMValueRef width0_vec,
+ LLVMValueRef width1_vec,
+ LLVMValueRef height0_vec,
+ LLVMValueRef height1_vec,
+ LLVMValueRef depth0_vec,
+ LLVMValueRef depth1_vec,
+ LLVMValueRef row_stride0_vec,
+ LLVMValueRef row_stride1_vec,
+ LLVMValueRef img_stride0_vec,
+ LLVMValueRef img_stride1_vec,
+ LLVMValueRef data_ptr0,
+ LLVMValueRef data_ptr1,
+ LLVMValueRef *colors_out)
+{
+ LLVMValueRef colors0[4], colors1[4];
+ int chan;
+
+ if (img_filter == PIPE_TEX_FILTER_NEAREST) {
+ lp_build_sample_image_nearest(bld,
+ width0_vec, height0_vec, depth0_vec,
+ row_stride0_vec, img_stride0_vec,
+ data_ptr0, s, t, r, colors0);
+
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
+ /* sample the second mipmap level, and interp */
+ lp_build_sample_image_nearest(bld,
+ width1_vec, height1_vec, depth1_vec,
+ row_stride1_vec, img_stride1_vec,
+ data_ptr1, s, t, r, colors1);
+ }
+ }
+ else {
+ assert(img_filter == PIPE_TEX_FILTER_LINEAR);
+
+ lp_build_sample_image_linear(bld,
+ width0_vec, height0_vec, depth0_vec,
+ row_stride0_vec, img_stride0_vec,
+ data_ptr0, s, t, r, colors0);
+
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
+ /* sample the second mipmap level, and interp */
+ lp_build_sample_image_linear(bld,
+ width1_vec, height1_vec, depth1_vec,
+ row_stride1_vec, img_stride1_vec,
+ data_ptr1, s, t, r, colors1);
+ }
+ }
+
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
+ /* interpolate samples from the two mipmap levels */
+ for (chan = 0; chan < 4; chan++) {
+ colors_out[chan] = lp_build_lerp(&bld->texel_bld, lod_fpart,
+ colors0[chan], colors1[chan]);
+ }
+ }
+ else {
+ /* use first/only level's colors */
+ for (chan = 0; chan < 4; chan++) {
+ colors_out[chan] = colors0[chan];
+ }
+ }
+}
+
+
+
+/**
+ * General texture sampling codegen.
+ * This function handles texture sampling for all texture targets (1D,
+ * 2D, 3D, cube) and all filtering modes.
+ */
+static void
+lp_build_sample_general(struct lp_build_sample_context *bld,
+ unsigned unit,
+ LLVMValueRef s,
+ LLVMValueRef t,
+ LLVMValueRef r,
+ LLVMValueRef width,
+ LLVMValueRef height,
+ LLVMValueRef depth,
+ LLVMValueRef width_vec,
+ LLVMValueRef height_vec,
+ LLVMValueRef depth_vec,
+ LLVMValueRef row_stride_array,
+ LLVMValueRef img_stride_array,
+ LLVMValueRef data_array,
+ LLVMValueRef *colors_out)
+{
+ struct lp_build_context *float_bld = &bld->float_bld;
+ const unsigned mip_filter = bld->static_state->min_mip_filter;
+ const unsigned min_filter = bld->static_state->min_img_filter;
+ const unsigned mag_filter = bld->static_state->mag_img_filter;
+ const int dims = texture_dims(bld->static_state->target);
+ LLVMValueRef lod = NULL, lod_fpart = NULL;
+ LLVMValueRef ilevel0, ilevel1 = NULL, ilevel0_vec, ilevel1_vec = NULL;
+ LLVMValueRef width0_vec = NULL, height0_vec = NULL, depth0_vec = NULL;
+ LLVMValueRef width1_vec = NULL, height1_vec = NULL, depth1_vec = NULL;
+ LLVMValueRef row_stride0_vec = NULL, row_stride1_vec = NULL;
+ LLVMValueRef img_stride0_vec = NULL, img_stride1_vec = NULL;
+ LLVMValueRef data_ptr0, data_ptr1 = NULL;
+
+ /*
+ printf("%s mip %d min %d mag %d\n", __FUNCTION__,
+ mip_filter, min_filter, mag_filter);
+ */
+
+ /*
+ * Compute the level of detail (float).
+ */
+ if (min_filter != mag_filter ||
+ mip_filter != PIPE_TEX_MIPFILTER_NONE) {
+ /* Need to compute lod either to choose mipmap levels or to
+ * distinguish between minification/magnification with one mipmap level.
+ */
+ lod = lp_build_lod_selector(bld, s, t, r, width, height, depth);
+ }
+
+ /*
+ * Compute integer mipmap level(s) to fetch texels from.
+ */
+ if (mip_filter == PIPE_TEX_MIPFILTER_NONE) {
+ /* always use mip level 0 */
+ ilevel0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
+ }
+ else {
+ if (mip_filter == PIPE_TEX_MIPFILTER_NEAREST) {
+ lp_build_nearest_mip_level(bld, unit, lod, &ilevel0);
+ }
+ else {
+ assert(mip_filter == PIPE_TEX_MIPFILTER_LINEAR);
+ lp_build_linear_mip_levels(bld, unit, lod, &ilevel0, &ilevel1,
+ &lod_fpart);
+ lod_fpart = lp_build_broadcast_scalar(&bld->coord_bld, lod_fpart);
+ }
+ }
+
+ /*
+ * Convert scalar integer mipmap levels into vectors.
+ */
+ ilevel0_vec = lp_build_broadcast_scalar(&bld->int_coord_bld, ilevel0);
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR)
+ ilevel1_vec = lp_build_broadcast_scalar(&bld->int_coord_bld, ilevel1);
+
+ /*
+ * Compute width, height at mipmap level 'ilevel0'
+ */
+ width0_vec = lp_build_minify(bld, width_vec, ilevel0_vec);
+ if (dims >= 2) {
+ 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 || bld->static_state->target == PIPE_TEXTURE_CUBE) {
+ img_stride0_vec = lp_build_get_level_stride_vec(bld,
+ img_stride_array,
+ ilevel0);
+ if (dims == 3) {
+ depth0_vec = lp_build_minify(bld, depth_vec, ilevel0_vec);
+ }
+ }
+ }
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
+ /* compute width, height, depth for second mipmap level at 'ilevel1' */
+ width1_vec = lp_build_minify(bld, width_vec, ilevel1_vec);
+ if (dims >= 2) {
+ 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 || bld->static_state->target == PIPE_TEXTURE_CUBE) {
+ img_stride1_vec = lp_build_get_level_stride_vec(bld,
+ img_stride_array,
+ ilevel1);
+ if (dims ==3) {
+ depth1_vec = lp_build_minify(bld, depth_vec, ilevel1_vec);
+ }
+ }
+ }
+ }
+
+ /*
+ * Choose cube face, recompute per-face texcoords.
+ */
+ 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 */
+ }
+
+ /*
+ * Get pointer(s) to image data for mipmap level(s).
+ */
+ data_ptr0 = lp_build_get_mipmap_level(bld, data_array, ilevel0);
+ if (mip_filter == PIPE_TEX_MIPFILTER_LINEAR) {
+ data_ptr1 = lp_build_get_mipmap_level(bld, data_array, ilevel1);
+ }
+
+ /*
+ * Get/interpolate texture colors.
+ */
+ if (min_filter == mag_filter) {
+ /* no need to distinquish between minification and magnification */
+ lp_build_sample_mipmap(bld, min_filter, mip_filter, s, t, r, lod_fpart,
+ width0_vec, width1_vec,
+ height0_vec, height1_vec,
+ depth0_vec, depth1_vec,
+ row_stride0_vec, row_stride1_vec,
+ img_stride0_vec, img_stride1_vec,
+ data_ptr0, data_ptr1,
+ colors_out);
+ }
+ else {
+ /* Emit conditional to choose min image filter or mag image filter
+ * depending on the lod being >0 or <= 0, respectively.
+ */
+ struct lp_build_flow_context *flow_ctx;
+ struct lp_build_if_state if_ctx;
+ LLVMValueRef minify;
+
+ flow_ctx = lp_build_flow_create(bld->builder);
+ lp_build_flow_scope_begin(flow_ctx);
+
+ lp_build_flow_scope_declare(flow_ctx, &colors_out[0]);
+ lp_build_flow_scope_declare(flow_ctx, &colors_out[1]);
+ lp_build_flow_scope_declare(flow_ctx, &colors_out[2]);
+ lp_build_flow_scope_declare(flow_ctx, &colors_out[3]);
+
+ /* minify = lod > 0.0 */
+ minify = LLVMBuildFCmp(bld->builder, LLVMRealUGE,
+ lod, float_bld->zero, "");
+
+ lp_build_if(&if_ctx, flow_ctx, bld->builder, minify);
+ {
+ /* Use the minification filter */
+ lp_build_sample_mipmap(bld, min_filter, mip_filter,
+ s, t, r, lod_fpart,
+ width0_vec, width1_vec,
+ height0_vec, height1_vec,
+ depth0_vec, depth1_vec,
+ row_stride0_vec, row_stride1_vec,
+ img_stride0_vec, img_stride1_vec,
+ data_ptr0, data_ptr1,
+ colors_out);
+ }
+ lp_build_else(&if_ctx);
+ {
+ /* Use the magnification filter */
+ lp_build_sample_mipmap(bld, mag_filter, mip_filter,
+ s, t, r, lod_fpart,
+ width0_vec, width1_vec,
+ height0_vec, height1_vec,
+ depth0_vec, depth1_vec,
+ row_stride0_vec, row_stride1_vec,
+ img_stride0_vec, img_stride1_vec,
+ data_ptr0, data_ptr1,
+ colors_out);
+ }
+ lp_build_endif(&if_ctx);
+
+ lp_build_flow_scope_end(flow_ctx);
+ lp_build_flow_destroy(flow_ctx);
}
}
+
static void
lp_build_rgba8_to_f32_soa(LLVMBuilderRef builder,
struct lp_type dst_type,
LLVMValueRef packed,
LLVMValueRef *rgba)
{
- LLVMValueRef mask = lp_build_int_const_scalar(dst_type, 0xff);
+ LLVMValueRef mask = lp_build_const_int_vec(dst_type, 0xff);
unsigned chan;
/* Decode the input vector components */
input = packed;
if(start)
- input = LLVMBuildLShr(builder, input, lp_build_int_const_scalar(dst_type, start), "");
+ input = LLVMBuildLShr(builder, input, lp_build_const_int_vec(dst_type, start), "");
if(stop < 32)
input = LLVMBuildAnd(builder, input, mask, "");
LLVMValueRef t,
LLVMValueRef width,
LLVMValueRef height,
- LLVMValueRef stride,
+ LLVMValueRef stride_array,
LLVMValueRef data_array,
LLVMValueRef *texel)
{
LLVMValueRef neighbors_hi[2][2];
LLVMValueRef packed, packed_lo, packed_hi;
LLVMValueRef unswizzled[4];
+ LLVMValueRef stride;
- lp_build_context_init(&i32, builder, lp_type_int(32));
+ lp_build_context_init(&i32, builder, lp_type_int_vec(32));
lp_build_context_init(&h16, builder, lp_type_ufixed(16));
lp_build_context_init(&u8n, builder, lp_type_unorm(8));
t = LLVMBuildFPToSI(builder, t, i32_vec_type, "");
/* subtract 0.5 (add -128) */
- i32_c128 = lp_build_int_const_scalar(i32.type, -128);
+ i32_c128 = lp_build_const_int_vec(i32.type, -128);
s = LLVMBuildAdd(builder, s, i32_c128, "");
t = LLVMBuildAdd(builder, t, i32_c128, "");
/* compute floor (shift right 8) */
- i32_c8 = lp_build_int_const_scalar(i32.type, 8);
+ i32_c8 = lp_build_const_int_vec(i32.type, 8);
s_ipart = LLVMBuildAShr(builder, s, i32_c8, "");
t_ipart = LLVMBuildAShr(builder, t, i32_c8, "");
/* compute fractional part (AND with 0xff) */
- i32_c255 = lp_build_int_const_scalar(i32.type, 255);
+ i32_c255 = lp_build_const_int_vec(i32.type, 255);
s_fpart = LLVMBuildAnd(builder, s, i32_c255, "");
t_fpart = LLVMBuildAnd(builder, t, i32_c255, "");
t_fpart_hi = LLVMBuildShuffleVector(builder, t_fpart, h16.undef, shuffle_hi, "");
}
+ stride = lp_build_get_const_level_stride_vec(bld, stride_array, 0);
+
/*
* Fetch the pixels as 4 x 32bit (rgba order might differ):
*
}
assert(res);
- res = lp_build_mul(texel_bld, res, lp_build_const_scalar(texel_bld->type, 0.25));
+ res = lp_build_mul(texel_bld, res, lp_build_const_vec(texel_bld->type, 0.25));
/* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
for(chan = 0; chan < 3; ++chan)
}
-static int
-texture_dims(enum pipe_texture_target tex)
-{
- switch (tex) {
- case PIPE_TEXTURE_1D:
- return 1;
- case PIPE_TEXTURE_2D:
- case PIPE_TEXTURE_CUBE:
- return 2;
- case PIPE_TEXTURE_3D:
- return 3;
- default:
- assert(0 && "bad texture target in texture_dims()");
- return 2;
- }
-}
-
-
-/**
- * Generate code to compute texture level of detail (lambda).
- * \param s vector of texcoord s values
- * \param t vector of texcoord t values
- * \param r vector of texcoord r values
- * \param width scalar int texture width
- * \param height scalar int texture height
- * \param depth scalar int texture depth
- */
-static LLVMValueRef
-lp_build_lod_selector(struct lp_build_sample_context *bld,
- LLVMValueRef s,
- LLVMValueRef t,
- LLVMValueRef r,
- LLVMValueRef width,
- LLVMValueRef height,
- LLVMValueRef depth)
-
-{
- const int dims = texture_dims(bld->static_state->target);
- struct lp_build_context *coord_bld = &bld->coord_bld;
-
- LLVMValueRef lod_bias = lp_build_const_scalar(bld->coord_bld.type,
- bld->static_state->lod_bias);
- LLVMValueRef min_lod = lp_build_const_scalar(bld->coord_bld.type,
- bld->static_state->min_lod);
- LLVMValueRef max_lod = lp_build_const_scalar(bld->coord_bld.type,
- bld->static_state->max_lod);
-
- LLVMValueRef index0 = LLVMConstInt(LLVMInt32Type(), 0, 0);
- LLVMValueRef index1 = LLVMConstInt(LLVMInt32Type(), 1, 0);
- LLVMValueRef index2 = LLVMConstInt(LLVMInt32Type(), 2, 0);
-
- LLVMValueRef s0, s1, s2;
- LLVMValueRef t0, t1, t2;
- LLVMValueRef r0, r1, r2;
- LLVMValueRef dsdx, dsdy, dtdx, dtdy, drdx, drdy;
- LLVMValueRef rho, lod;
-
- /*
- * dsdx = abs(s[1] - s[0]);
- * dsdy = abs(s[2] - s[0]);
- * dtdx = abs(t[1] - t[0]);
- * dtdy = abs(t[2] - t[0]);
- * drdx = abs(r[1] - r[0]);
- * drdy = abs(r[2] - r[0]);
- * XXX we're assuming a four-element quad in 2x2 layout here.
- */
- s0 = LLVMBuildExtractElement(bld->builder, s, index0, "s0");
- s1 = LLVMBuildExtractElement(bld->builder, s, index1, "s1");
- s2 = LLVMBuildExtractElement(bld->builder, s, index2, "s2");
- dsdx = lp_build_abs(coord_bld, lp_build_sub(coord_bld, s1, s0));
- dsdy = lp_build_abs(coord_bld, lp_build_sub(coord_bld, s2, s0));
- if (dims > 1) {
- t0 = LLVMBuildExtractElement(bld->builder, t, index0, "t0");
- t1 = LLVMBuildExtractElement(bld->builder, t, index1, "t1");
- t2 = LLVMBuildExtractElement(bld->builder, t, index2, "t2");
- dtdx = lp_build_abs(coord_bld, lp_build_sub(coord_bld, t1, t0));
- dtdy = lp_build_abs(coord_bld, lp_build_sub(coord_bld, t2, t0));
- if (dims > 2) {
- r0 = LLVMBuildExtractElement(bld->builder, r, index0, "r0");
- r1 = LLVMBuildExtractElement(bld->builder, r, index1, "r1");
- r2 = LLVMBuildExtractElement(bld->builder, r, index2, "r2");
- drdx = lp_build_abs(coord_bld, lp_build_sub(coord_bld, r1, r0));
- drdy = lp_build_abs(coord_bld, lp_build_sub(coord_bld, r2, r0));
- }
- }
-
- /* Compute rho = max of all partial derivatives scaled by texture size.
- * XXX this can be vectorized somewhat
- */
- rho = lp_build_mul(coord_bld,
- lp_build_max(coord_bld, dsdx, dsdy),
- lp_build_int_to_float(coord_bld, width));
- if (dims > 1) {
- LLVMValueRef max;
- max = lp_build_mul(coord_bld,
- lp_build_max(coord_bld, dtdx, dtdy),
- lp_build_int_to_float(coord_bld, height));
- rho = lp_build_max(coord_bld, rho, max);
- if (dims > 2) {
- max = lp_build_mul(coord_bld,
- lp_build_max(coord_bld, drdx, drdy),
- lp_build_int_to_float(coord_bld, depth));
- rho = lp_build_max(coord_bld, rho, max);
- }
- }
-
- /* compute lod = log2(rho) */
- lod = lp_build_log2(coord_bld, rho);
-
- /* add lod bias */
- lod = lp_build_add(coord_bld, lod, lod_bias);
-
- /* clamp lod */
- lod = lp_build_clamp(coord_bld, lod, min_lod, max_lod);
-
- return lod;
-}
-
-
-/**
- * For PIPE_TEX_MIPFILTER_NEAREST, convert float LOD to integer
- * mipmap level index.
- * \param lod scalar float texture level of detail
- * \param level_out returns integer
- */
-static void
-lp_build_nearest_mip_level(struct lp_build_sample_context *bld,
- unsigned unit,
- LLVMValueRef lod,
- LLVMValueRef *level_out)
-{
- struct lp_build_context *coord_bld = &bld->coord_bld;
- struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
- LLVMValueRef last_level, level;
-
- last_level = bld->dynamic_state->last_level(bld->dynamic_state,
- bld->builder, unit);
-
- /* convert float lod to integer */
- level = lp_build_iround(coord_bld, lod);
-
- /* clamp level to legal range of levels */
- *level_out = lp_build_clamp(int_coord_bld, level,
- int_coord_bld->zero,
- last_level);
-}
-
-
-/**
- * For PIPE_TEX_MIPFILTER_LINEAR, convert float LOD to integer to
- * two (adjacent) mipmap level indexes. Later, we'll sample from those
- * two mipmap levels and interpolate between them.
- */
-static void
-lp_build_linear_mip_levels(struct lp_build_sample_context *bld,
- unsigned unit,
- LLVMValueRef lod,
- LLVMValueRef *level0_out,
- LLVMValueRef *level1_out,
- LLVMValueRef *weight_out)
-{
- struct lp_build_context *coord_bld = &bld->coord_bld;
- struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
- LLVMValueRef last_level, level;
-
- last_level = bld->dynamic_state->last_level(bld->dynamic_state,
- bld->builder, unit);
-
- /* convert float lod to integer */
- level = lp_build_ifloor(coord_bld, lod);
-
- /* compute level 0 and clamp to legal range of levels */
- *level0_out = lp_build_clamp(int_coord_bld, level,
- int_coord_bld->zero,
- last_level);
- /* compute level 1 and clamp to legal range of levels */
- *level1_out = lp_build_add(int_coord_bld, *level0_out, int_coord_bld->one);
- *level1_out = lp_build_min(int_coord_bld, *level1_out, int_coord_bld->zero);
-
- *weight_out = lp_build_fract(coord_bld, lod);
-}
-
-
-
/**
* Build texture sampling code.
* 'texel' will return a vector of four LLVMValueRefs corresponding to
* R, G, B, A.
+ * \param type vector float type to use for coords, etc.
*/
void
lp_build_sample_soa(LLVMBuilderRef builder,
LLVMValueRef *texel)
{
struct lp_build_sample_context bld;
- LLVMValueRef width;
- LLVMValueRef height;
- LLVMValueRef stride;
+ LLVMValueRef width, width_vec;
+ LLVMValueRef height, height_vec;
+ LLVMValueRef depth, depth_vec;
+ LLVMValueRef row_stride_array, img_stride_array;
LLVMValueRef data_array;
LLVMValueRef s;
LLVMValueRef t;
LLVMValueRef r;
- (void) lp_build_lod_selector; /* temporary to silence warning */
- (void) lp_build_nearest_mip_level;
- (void) lp_build_linear_mip_levels;
-
/* Setup our build context */
memset(&bld, 0, sizeof bld);
bld.builder = builder;
bld.static_state = static_state;
bld.dynamic_state = dynamic_state;
bld.format_desc = util_format_description(static_state->format);
+
+ bld.float_type = lp_type_float(32);
+ bld.int_type = lp_type_int(32);
bld.coord_type = type;
bld.uint_coord_type = lp_uint_type(type);
bld.int_coord_type = lp_int_type(type);
bld.texel_type = type;
+
+ lp_build_context_init(&bld.float_bld, builder, bld.float_type);
+ lp_build_context_init(&bld.int_bld, builder, bld.int_type);
lp_build_context_init(&bld.coord_bld, builder, bld.coord_type);
lp_build_context_init(&bld.uint_coord_bld, builder, bld.uint_coord_type);
lp_build_context_init(&bld.int_coord_bld, builder, bld.int_coord_type);
/* Get the dynamic state */
width = dynamic_state->width(dynamic_state, builder, unit);
height = dynamic_state->height(dynamic_state, builder, unit);
- stride = dynamic_state->stride(dynamic_state, builder, unit);
+ depth = dynamic_state->depth(dynamic_state, builder, unit);
+ row_stride_array = dynamic_state->row_stride(dynamic_state, builder, unit);
+ img_stride_array = dynamic_state->img_stride(dynamic_state, builder, unit);
data_array = dynamic_state->data_ptr(dynamic_state, builder, unit);
/* Note that data_array is an array[level] of pointers to texture images */
t = coords[1];
r = coords[2];
- width = lp_build_broadcast_scalar(&bld.uint_coord_bld, width);
- height = lp_build_broadcast_scalar(&bld.uint_coord_bld, height);
- stride = lp_build_broadcast_scalar(&bld.uint_coord_bld, stride);
-
- if(static_state->target == PIPE_TEXTURE_1D)
- t = bld.coord_bld.zero;
-
- switch (static_state->min_img_filter) {
- case PIPE_TEX_FILTER_NEAREST:
- lp_build_sample_2d_nearest_soa(&bld, s, t, width, height,
- stride, data_array, texel);
- break;
- case PIPE_TEX_FILTER_LINEAR:
- if(lp_format_is_rgba8(bld.format_desc) &&
- is_simple_wrap_mode(static_state->wrap_s) &&
- is_simple_wrap_mode(static_state->wrap_t))
- lp_build_sample_2d_linear_aos(&bld, s, t, width, height,
- stride, data_array, texel);
- else
- lp_build_sample_2d_linear_soa(&bld, s, t, width, height,
- stride, data_array, texel);
- break;
- default:
- assert(0);
+ width_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, width);
+ height_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, height);
+ depth_vec = lp_build_broadcast_scalar(&bld.uint_coord_bld, depth);
+
+ if (util_format_is_rgba8_variant(bld.format_desc) &&
+ static_state->target == PIPE_TEXTURE_2D &&
+ static_state->min_img_filter == PIPE_TEX_FILTER_LINEAR &&
+ static_state->mag_img_filter == PIPE_TEX_FILTER_LINEAR &&
+ static_state->min_mip_filter == PIPE_TEX_MIPFILTER_NONE &&
+ is_simple_wrap_mode(static_state->wrap_s) &&
+ is_simple_wrap_mode(static_state->wrap_t)) {
+ /* special case */
+ lp_build_sample_2d_linear_aos(&bld, s, t, width_vec, height_vec,
+ row_stride_array, data_array, texel);
+ }
+ else {
+ lp_build_sample_general(&bld, unit, s, t, r,
+ width, height, depth,
+ width_vec, height_vec, depth_vec,
+ row_stride_array, img_stride_array,
+ data_array,
+ texel);
}
-
- /* FIXME: respect static_state->min_mip_filter */;
- /* FIXME: respect static_state->mag_img_filter */;
lp_build_sample_compare(&bld, r, texel);
}
projects / mesa.git / blobdiff