From eecf9c85b071973cc54d8e8bb7e9982a1f5714a5 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 15 Mar 2010 10:36:56 -0600 Subject: gallivm: implement minification/magnification selection Use the LOD value to determine whether to use the minification vs. magnification filter. All mipmap sampling modes work now. --- src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c | 188 ++++++++++++++++------ 1 file changed, 137 insertions(+), 51 deletions(-) diff --git a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c index 19d78424bce..ba62d7a013b 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_sample_soa.c @@ -1413,6 +1413,85 @@ lp_build_cube_lookup(struct lp_build_sample_context *bld, +/** + * 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_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, @@ -1435,6 +1514,7 @@ lp_build_sample_general(struct lp_build_sample_context *bld, 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; @@ -1446,7 +1526,6 @@ lp_build_sample_general(struct lp_build_sample_context *bld, LLVMValueRef row_stride0_vec = NULL, row_stride1_vec = NULL; LLVMValueRef img_stride0_vec = NULL, img_stride1_vec = NULL; LLVMValueRef data_ptr0, data_ptr1; - int chan; /* printf("%s mip %d min %d mag %d\n", __FUNCTION__, @@ -1459,6 +1538,10 @@ lp_build_sample_general(struct lp_build_sample_context *bld, if (mip_filter == PIPE_TEX_MIPFILTER_NONE) { /* always use mip level 0 */ ilevel0 = LLVMConstInt(LLVMInt32Type(), 0, 0); + + /* XXX temporary here */ + lod = lp_build_lod_selector(bld, s, t, r, width, height, depth); + } else { /* compute float LOD */ @@ -1538,62 +1621,65 @@ lp_build_sample_general(struct lp_build_sample_context *bld, /* * Get/interpolate texture colors. */ - /* XXX temporarily force this path: */ - if (1 /*min_filter == mag_filter*/) { - /* same filter for minification or magnification */ - LLVMValueRef colors0[4], colors1[4]; - - if (min_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(min_filter == PIPE_TEX_FILTER_LINEAR); + if (min_filter == mag_filter) { + /* no need to distinquish between minification and magnification */ + lp_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; - lp_build_sample_image_linear(bld, - width0_vec, height0_vec, depth0_vec, - row_stride0_vec, img_stride0_vec, - data_ptr0, s, t, r, colors0); + 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]); - 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); - } - } + /* minify = lod > 0.0 */ + minify = LLVMBuildFCmp(bld->builder, LLVMRealUGE, + lod, float_bld->zero, ""); - 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]); - } + lp_build_if(&if_ctx, flow_ctx, bld->builder, minify); + { + /* Use the minification filter */ + lp_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 { - /* use first/only level's colors */ - for (chan = 0; chan < 4; chan++) { - colors_out[chan] = colors0[chan]; - } + lp_build_else(&if_ctx); + { + /* Use the magnification filter */ + lp_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); } - } - else { - /* emit conditional to choose min image filter or mag image filter - * depending on the lod being >0 or <= 0, respectively. - */ - abort(); + lp_build_endif(&if_ctx); + + lp_build_flow_scope_end(flow_ctx); + lp_build_flow_destroy(flow_ctx); } } -- cgit v1.2.3