diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_format_aos.c')
-rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_format_aos.c | 207 |
1 files changed, 144 insertions, 63 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c index b9b5d84..10e82f1 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_format_aos.c @@ -25,18 +25,39 @@ * **************************************************************************/ +/** + * @file + * AoS pixel format manipulation. + * + * @author Jose Fonseca <jfonseca@vmware.com> + */ + +#include "util/u_cpu_detect.h" #include "util/u_format.h" +#include "lp_bld_type.h" +#include "lp_bld_const.h" +#include "lp_bld_logic.h" +#include "lp_bld_swizzle.h" #include "lp_bld_format.h" +/** + * Unpack a single pixel into its RGBA components. + * + * @param packed integer. + * + * @return RGBA in a 4 floats vector. + * + * XXX: This is mostly for reference and testing -- operating a single pixel at + * a time is rarely if ever needed. + */ LLVMValueRef lp_build_unpack_rgba_aos(LLVMBuilderRef builder, - enum pipe_format format, + const struct util_format_description *desc, LLVMValueRef packed) { - const struct util_format_description *desc; LLVMTypeRef type; LLVMValueRef shifted, casted, scaled, masked; LLVMValueRef shifts[4]; @@ -49,8 +70,6 @@ lp_build_unpack_rgba_aos(LLVMBuilderRef builder, unsigned shift; unsigned i; - desc = util_format_description(format); - /* FIXME: Support more formats */ assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); assert(desc->block.width == 1); @@ -111,7 +130,7 @@ lp_build_unpack_rgba_aos(LLVMBuilderRef builder, shifted = LLVMBuildLShr(builder, packed, LLVMConstVector(shifts, 4), ""); masked = LLVMBuildAnd(builder, shifted, LLVMConstVector(masks, 4), ""); - // UIToFP can't be expressed in SSE2 + /* UIToFP can't be expressed in SSE2 */ casted = LLVMBuildSIToFP(builder, masked, LLVMVectorType(LLVMFloatType(), 4), ""); if (normalized) @@ -151,12 +170,130 @@ lp_build_unpack_rgba_aos(LLVMBuilderRef builder, } +/** + * Take a vector with packed pixels and unpack into a rgba8 vector. + * + * Formats with bit depth smaller than 32bits are accepted, but they must be + * padded to 32bits. + */ +LLVMValueRef +lp_build_unpack_rgba8_aos(LLVMBuilderRef builder, + const struct util_format_description *desc, + struct lp_type type, + LLVMValueRef packed) +{ + struct lp_build_context bld; + bool rgba8; + LLVMValueRef res; + unsigned i; + + lp_build_context_init(&bld, builder, type); + + /* FIXME: Support more formats */ + assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); + assert(desc->block.width == 1); + assert(desc->block.height == 1); + assert(desc->block.bits <= 32); + + assert(!type.floating); + assert(!type.fixed); + assert(type.norm); + assert(type.width == 8); + assert(type.length % 4 == 0); + + rgba8 = TRUE; + for(i = 0; i < 4; ++i) { + assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED || + desc->channel[i].type == UTIL_FORMAT_TYPE_VOID); + if(desc->channel[0].size != 8) + rgba8 = FALSE; + } + + if(rgba8) { + /* + * The pixel is already in a rgba8 format variant. All it is necessary + * is to swizzle the channels. + */ + + unsigned char swizzles[4]; + boolean zeros[4]; /* bitwise AND mask */ + boolean ones[4]; /* bitwise OR mask */ + boolean swizzles_needed = FALSE; + boolean zeros_needed = FALSE; + boolean ones_needed = FALSE; + + for(i = 0; i < 4; ++i) { + enum util_format_swizzle swizzle = desc->swizzle[i]; + + /* Initialize with the no-op case */ + swizzles[i] = util_cpu_caps.little_endian ? 3 - i : i; + zeros[i] = TRUE; + ones[i] = FALSE; + + switch (swizzle) { + case UTIL_FORMAT_SWIZZLE_X: + case UTIL_FORMAT_SWIZZLE_Y: + case UTIL_FORMAT_SWIZZLE_Z: + case UTIL_FORMAT_SWIZZLE_W: + if(swizzle != swizzles[i]) { + swizzles[i] = swizzle; + swizzles_needed = TRUE; + } + break; + case UTIL_FORMAT_SWIZZLE_0: + zeros[i] = FALSE; + zeros_needed = TRUE; + break; + case UTIL_FORMAT_SWIZZLE_1: + ones[i] = TRUE; + ones_needed = TRUE; + break; + case UTIL_FORMAT_SWIZZLE_NONE: + assert(0); + break; + } + } + + res = packed; + + if(swizzles_needed) + res = lp_build_swizzle1_aos(&bld, res, swizzles); + + if(zeros_needed) { + /* Mask out zero channels */ + LLVMValueRef mask = lp_build_const_mask_aos(type, zeros); + res = LLVMBuildAnd(builder, res, mask, ""); + } + + if(ones_needed) { + /* Or one channels */ + LLVMValueRef mask = lp_build_const_mask_aos(type, ones); + res = LLVMBuildOr(builder, res, mask, ""); + } + } + else { + /* FIXME */ + assert(0); + res = lp_build_undef(type); + } + + return res; +} + + +/** + * Pack a single pixel. + * + * @param rgba 4 float vector with the unpacked components. + * + * XXX: This is mostly for reference and testing -- operating a single pixel at + * a time is rarely if ever needed. + */ LLVMValueRef lp_build_pack_rgba_aos(LLVMBuilderRef builder, - enum pipe_format format, + const struct util_format_description *desc, LLVMValueRef rgba) { - const struct util_format_description *desc; LLVMTypeRef type; LLVMValueRef packed = NULL; LLVMValueRef swizzles[4]; @@ -167,8 +304,6 @@ lp_build_pack_rgba_aos(LLVMBuilderRef builder, unsigned shift; unsigned i, j; - desc = util_format_description(format); - assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); assert(desc->block.width == 1); assert(desc->block.height == 1); @@ -247,57 +382,3 @@ lp_build_pack_rgba_aos(LLVMBuilderRef builder, return packed; } - - -LLVMValueRef -lp_build_load_rgba_aos(LLVMBuilderRef builder, - enum pipe_format format, - LLVMValueRef ptr) -{ - const struct util_format_description *desc; - LLVMTypeRef type; - LLVMValueRef packed; - - desc = util_format_description(format); - - /* FIXME: Support more formats */ - assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); - assert(desc->block.width == 1); - assert(desc->block.height == 1); - assert(desc->block.bits <= 32); - - type = LLVMIntType(desc->block.bits); - - ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""); - - packed = LLVMBuildLoad(builder, ptr, ""); - - return lp_build_unpack_rgba_aos(builder, format, packed); -} - - -void -lp_build_store_rgba_aos(LLVMBuilderRef builder, - enum pipe_format format, - LLVMValueRef ptr, - LLVMValueRef rgba) -{ - const struct util_format_description *desc; - LLVMTypeRef type; - LLVMValueRef packed; - - desc = util_format_description(format); - - assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); - assert(desc->block.width == 1); - assert(desc->block.height == 1); - - type = LLVMIntType(desc->block.bits); - - packed = lp_build_pack_rgba_aos(builder, format, rgba); - - ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""); - - LLVMBuildStore(builder, packed, ptr); -} - |