diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_depth.c | 47 |
1 files changed, 26 insertions, 21 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_depth.c b/src/gallium/drivers/llvmpipe/lp_bld_depth.c index ddf7da0b14d..167ac0ed2e2 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_depth.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_depth.c @@ -330,7 +330,7 @@ lp_depth_type(const struct util_format_description *format_desc, * in the Z buffer (typically 0xffffff00 or 0x00ffffff). That lets us * get by with fewer bit twiddling steps. */ -static void +static boolean get_z_shift_and_mask(const struct util_format_description *format_desc, unsigned *shift, unsigned *width, unsigned *mask) { @@ -345,7 +345,8 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, z_swizzle = format_desc->swizzle[0]; - assert(z_swizzle != UTIL_FORMAT_SWIZZLE_NONE); + if (z_swizzle == UTIL_FORMAT_SWIZZLE_NONE) + return FALSE; *width = format_desc->channel[z_swizzle].size; @@ -366,6 +367,8 @@ get_z_shift_and_mask(const struct util_format_description *format_desc, } *shift = padding_right; + + return TRUE; } @@ -554,6 +557,27 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, { unsigned s_shift, s_mask; + if (get_z_shift_and_mask(format_desc, &z_shift, &z_width, &z_mask)) { + if (z_mask != 0xffffffff) { + z_bitmask = lp_build_const_int_vec(z_type, z_mask); + } + + /* + * Align the framebuffer Z 's LSB to the right. + */ + if (z_shift) { + LLVMValueRef shift = lp_build_const_int_vec(z_type, z_shift); + z_dst = LLVMBuildLShr(builder, zs_dst, shift, "z_dst"); + } else if (z_bitmask) { + /* TODO: Instead of loading a mask from memory and ANDing, it's + * probably faster to just shake the bits with two shifts. */ + z_dst = LLVMBuildAnd(builder, zs_dst, z_bitmask, "z_dst"); + } else { + z_dst = zs_dst; + lp_build_name(z_dst, "z_dst"); + } + } + if (get_s_shift_and_mask(format_desc, &s_shift, &s_mask)) { if (s_shift) { LLVMValueRef shift = lp_build_const_int_vec(s_type, s_shift); @@ -605,8 +629,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, } if (depth->enabled) { - get_z_shift_and_mask(format_desc, &z_shift, &z_width, &z_mask); - /* * Convert fragment Z to the desired type, aligning the LSB to the right. */ @@ -644,23 +666,6 @@ lp_build_depth_stencil_test(LLVMBuilderRef builder, lp_build_name(z_src, "z_src"); - if (z_mask != 0xffffffff) { - z_bitmask = lp_build_const_int_vec(z_type, z_mask); - } - - /* - * Align the framebuffer Z 's LSB to the right. - */ - if (z_shift) { - LLVMValueRef shift = lp_build_const_int_vec(z_type, z_shift); - z_dst = LLVMBuildLShr(builder, zs_dst, shift, "z_dst"); - } else if (z_bitmask) { - z_dst = LLVMBuildAnd(builder, zs_dst, z_bitmask, "z_dst"); - } else { - z_dst = zs_dst; - lp_build_name(z_dst, "z_dst"); - } - /* compare src Z to dst Z, returning 'pass' mask */ z_pass = lp_build_cmp(&z_bld, depth->func, z_src, z_dst); |