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-rw-r--r--src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c152
1 files changed, 129 insertions, 23 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
index 1ba139c6cd..fe41d5ee49 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c
@@ -83,17 +83,92 @@ struct lp_build_sample_context
};
+/**
+ * Does the given texture wrap mode allow sampling the texture border color?
+ * XXX maybe move this into gallium util code.
+ */
+static boolean
+wrap_mode_uses_border_color(unsigned mode)
+{
+ switch (mode) {
+ case PIPE_TEX_WRAP_REPEAT:
+ case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ case PIPE_TEX_WRAP_MIRROR_REPEAT:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
+ return FALSE;
+ case PIPE_TEX_WRAP_CLAMP:
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP:
+ case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER:
+ return TRUE;
+ default:
+ assert(0 && "unexpected wrap mode");
+ return FALSE;
+ }
+}
+
+
+
+/**
+ * Gen code to fetch a texel from a texture at int coords (x, y).
+ * The result, texel, will be:
+ * texel[0] = red values
+ * texel[1] = green values
+ * texel[2] = blue values
+ * texel[3] = alpha values
+ */
static void
lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
+ LLVMValueRef width,
+ LLVMValueRef height,
LLVMValueRef x,
LLVMValueRef y,
LLVMValueRef y_stride,
LLVMValueRef data_ptr,
LLVMValueRef *texel)
{
+ struct lp_build_context *int_coord_bld = &bld->int_coord_bld;
LLVMValueRef offset;
LLVMValueRef packed;
+ LLVMValueRef use_border = NULL;
+
+ /* use_border = x < 0 || x >= width || y < 0 || y >= height */
+ if (wrap_mode_uses_border_color(bld->static_state->wrap_s)) {
+ LLVMValueRef b1, b2;
+ b1 = lp_build_cmp(int_coord_bld, PIPE_FUNC_LESS, x, int_coord_bld->zero);
+ b2 = lp_build_cmp(int_coord_bld, PIPE_FUNC_GEQUAL, x, width);
+ use_border = LLVMBuildOr(bld->builder, b1, b2, "b1_or_b2");
+ }
+
+ if (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);
+ 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");
+ }
+ }
+ /*
+ * 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 texture whenever possible (since that's quite a bit of code).
+ * Ex:
+ * if (use_border) {
+ * texel = border_color;
+ * }
+ * else {
+ * texel = sample_texture(coord);
+ * }
+ * As it is now, we always sample the texture, then selectively replace
+ * 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,
@@ -103,16 +178,30 @@ lp_build_sample_texel_soa(struct lp_build_sample_context *bld,
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,
+ bld->static_state->border_color[chan]);
+ texel[chan] = lp_build_select(&bld->texel_bld, use_border,
+ border_chan, texel[chan]);
+ }
+ }
}
@@ -180,14 +269,14 @@ lp_build_coord_mirror(struct lp_build_sample_context *bld,
* Return whether the given mode is supported by that function.
*/
static boolean
-is_simple_wrap_mode(int mode)
+is_simple_wrap_mode(unsigned mode)
{
switch (mode) {
case PIPE_TEX_WRAP_REPEAT:
case PIPE_TEX_WRAP_CLAMP:
case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
- case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
return TRUE;
+ case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
default:
return FALSE;
}
@@ -339,14 +428,15 @@ lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
/* min = -1.0 / (2 * length) */
min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f));
min = lp_build_negate(coord_bld, min);
- /* max = length - min */
- max = lp_build_sub(coord_bld, length_f, min);
+ /* max = 1.0 - min */
+ max = lp_build_sub(coord_bld, coord_bld->one, min);
+ /* coord = clamp(coord, min, max) */
+ coord = lp_build_clamp(coord_bld, coord, min, max);
/* scale coord to length (and sub 0.5?) */
coord = lp_build_mul(coord_bld, coord, length_f);
+ coord = lp_build_sub(coord_bld, coord, half);
/* compute lerp weight */
weight = lp_build_fract(coord_bld, coord);
- /* coord = clamp(coord, min, max) */
- coord = lp_build_clamp(coord_bld, coord, min, max);
/* convert to int */
coord0 = lp_build_ifloor(coord_bld, coord);
coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
@@ -375,12 +465,21 @@ lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
break;
case PIPE_TEX_WRAP_MIRROR_CLAMP:
- coord = lp_build_abs(coord_bld, coord);
- coord = lp_build_mul(coord_bld, coord, length_f);
- weight = lp_build_fract(coord_bld, coord);
- coord = lp_build_clamp(coord_bld, coord, coord_bld->zero, length_f_minus_one);
- coord0 = lp_build_ifloor(coord_bld, coord);
- coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
+ {
+ LLVMValueRef min, max;
+ /* min = 1.0 / (2 * length) */
+ min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f));
+ /* max = 1.0 - min */
+ max = lp_build_sub(coord_bld, coord_bld->one, min);
+
+ coord = lp_build_abs(coord_bld, coord);
+ coord = lp_build_clamp(coord_bld, coord, min, max);
+ coord = lp_build_mul(coord_bld, coord, length_f);
+ if(0)coord = lp_build_sub(coord_bld, coord, half);
+ weight = lp_build_fract(coord_bld, coord);
+ coord0 = lp_build_ifloor(coord_bld, coord);
+ coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
+ }
break;
case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE:
@@ -388,13 +487,14 @@ lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
LLVMValueRef min, max;
/* min = 1.0 / (2 * length) */
min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f));
- /* max = length - min */
- max = lp_build_sub(coord_bld, length_f, min);
+ /* max = 1.0 - min */
+ max = lp_build_sub(coord_bld, coord_bld->one, min);
coord = lp_build_abs(coord_bld, coord);
+ coord = lp_build_clamp(coord_bld, coord, min, max);
coord = lp_build_mul(coord_bld, coord, length_f);
+ coord = lp_build_sub(coord_bld, coord, half);
weight = lp_build_fract(coord_bld, coord);
- coord = lp_build_clamp(coord_bld, coord, min, max);
coord0 = lp_build_ifloor(coord_bld, coord);
coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
}
@@ -406,13 +506,14 @@ lp_build_sample_wrap_linear(struct lp_build_sample_context *bld,
/* min = -1.0 / (2 * length) */
min = lp_build_rcp(coord_bld, lp_build_mul(coord_bld, two, length_f));
min = lp_build_negate(coord_bld, min);
- /* max = length - min */
- max = lp_build_sub(coord_bld, length_f, min);
+ /* max = 1.0 - min */
+ max = lp_build_sub(coord_bld, coord_bld->one, min);
coord = lp_build_abs(coord_bld, coord);
+ coord = lp_build_clamp(coord_bld, coord, min, max);
coord = lp_build_mul(coord_bld, coord, length_f);
+ coord = lp_build_sub(coord_bld, coord, half);
weight = lp_build_fract(coord_bld, coord);
- coord = lp_build_clamp(coord_bld, coord, min, max);
coord0 = lp_build_ifloor(coord_bld, coord);
coord1 = lp_build_add(int_coord_bld, coord0, int_coord_bld->one);
}
@@ -598,7 +699,7 @@ lp_build_sample_2d_nearest_soa(struct lp_build_sample_context *bld,
lp_build_name(x, "tex.x.wrapped");
lp_build_name(y, "tex.y.wrapped");
- lp_build_sample_texel_soa(bld, x, y, stride, data_ptr, texel);
+ lp_build_sample_texel_soa(bld, width, height, x, y, stride, data_ptr, texel);
}
@@ -627,10 +728,10 @@ lp_build_sample_2d_linear_soa(struct lp_build_sample_context *bld,
lp_build_sample_wrap_linear(bld, t, height, bld->static_state->pot_height,
bld->static_state->wrap_t, &y0, &y1, &t_fpart);
- lp_build_sample_texel_soa(bld, x0, y0, stride, data_ptr, neighbors[0][0]);
- lp_build_sample_texel_soa(bld, x1, y0, stride, data_ptr, neighbors[0][1]);
- lp_build_sample_texel_soa(bld, x0, y1, stride, data_ptr, neighbors[1][0]);
- lp_build_sample_texel_soa(bld, x1, y1, stride, data_ptr, neighbors[1][1]);
+ lp_build_sample_texel_soa(bld, width, height, x0, y0, stride, data_ptr, neighbors[0][0]);
+ lp_build_sample_texel_soa(bld, width, height, x1, y0, stride, data_ptr, neighbors[0][1]);
+ lp_build_sample_texel_soa(bld, width, height, x0, y1, stride, data_ptr, neighbors[1][0]);
+ lp_build_sample_texel_soa(bld, width, height, x1, y1, stride, data_ptr, neighbors[1][1]);
/* TODO: Don't interpolate missing channels */
for(chan = 0; chan < 4; ++chan) {
@@ -907,6 +1008,11 @@ lp_build_sample_compare(struct lp_build_sample_context *bld,
}
+/**
+ * Build texture sampling code.
+ * 'texel' will return a vector of four LLVMValueRefs corresponding to
+ * R, G, B, A.
+ */
void
lp_build_sample_soa(LLVMBuilderRef builder,
const struct lp_sampler_static_state *static_state,
generated by cgit v1.2.3 (git 2.51.0) at 2025-11-04 01:43:24 +0000