[PATCH vkd3d v2 2/2] vkd3d-shader: Implement DXBC checksum for root signatures.
From: Józef Kucia <jkucia(a)codeweavers.com> Signed-off-by: Józef Kucia <jkucia(a)codeweavers.com> --- Version 2: Remove redundant ok() call. --- libs/vkd3d-shader/checksum.c | 73 ++++++++++++++++-------- libs/vkd3d-shader/dxbc.c | 6 +- libs/vkd3d-shader/vkd3d_shader_private.h | 6 +- tests/d3d12.c | 9 +-- 4 files changed, 56 insertions(+), 38 deletions(-) diff --git a/libs/vkd3d-shader/checksum.c b/libs/vkd3d-shader/checksum.c index d2929da92635..b9a7140221e0 100644 --- a/libs/vkd3d-shader/checksum.c +++ b/libs/vkd3d-shader/checksum.c @@ -35,11 +35,15 @@ #include "vkd3d_shader_private.h" +#define DXBC_CHECKSUM_BLOCK_SIZE 64 + +STATIC_ASSERT(sizeof(unsigned int) == 4); + struct md5_ctx { unsigned int i[2]; unsigned int buf[4]; - unsigned char in[64]; + unsigned char in[DXBC_CHECKSUM_BLOCK_SIZE]; unsigned char digest[16]; }; @@ -163,7 +167,7 @@ static void byte_reverse(unsigned char *buf, unsigned longs) * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious * initialization constants. */ -void md5_init(struct md5_ctx *ctx) +static void md5_init(struct md5_ctx *ctx) { ctx->buf[0] = 0x67452301; ctx->buf[1] = 0xefcdab89; @@ -177,7 +181,7 @@ void md5_init(struct md5_ctx *ctx) * Update context to reflect the concatenation of another buffer full * of bytes. */ -void md5_update(struct md5_ctx *ctx, const unsigned char *buf, unsigned int len) +static void md5_update(struct md5_ctx *ctx, const unsigned char *buf, unsigned int len) { unsigned int t; @@ -194,7 +198,7 @@ void md5_update(struct md5_ctx *ctx, const unsigned char *buf, unsigned int len) if (t) { unsigned char *p = (unsigned char *)ctx->in + t; - t = 64 - t; + t = DXBC_CHECKSUM_BLOCK_SIZE - t; if (len < t) { @@ -212,27 +216,25 @@ void md5_update(struct md5_ctx *ctx, const unsigned char *buf, unsigned int len) } /* Process data in 64-byte chunks */ - while (len >= 64) + while (len >= DXBC_CHECKSUM_BLOCK_SIZE) { - memcpy(ctx->in, buf, 64); + memcpy(ctx->in, buf, DXBC_CHECKSUM_BLOCK_SIZE); byte_reverse(ctx->in, 16); md5_transform(ctx->buf, (unsigned int *)ctx->in); - buf += 64; - len -= 64; + buf += DXBC_CHECKSUM_BLOCK_SIZE; + len -= DXBC_CHECKSUM_BLOCK_SIZE; } /* Handle any remaining bytes of data. */ memcpy(ctx->in, buf, len); } -/* - * Final wrapup - pad to 64-byte boundary with the bit pattern - * 1 0* (64-bit count of bits processed, MSB-first) - */ -void md5_final(struct md5_ctx *ctx) +static void dxbc_checksum_final(struct md5_ctx *ctx) { + unsigned int padding; + unsigned int length; unsigned int count; unsigned char *p; @@ -243,34 +245,57 @@ void md5_final(struct md5_ctx *ctx) always at least one byte free */ p = ctx->in + count; *p++ = 0x80; + ++count; /* Bytes of padding needed to make 64 bytes */ - count = 64 - 1 - count; + padding = DXBC_CHECKSUM_BLOCK_SIZE - count; /* Pad out to 56 mod 64 */ - if (count < 8) + if (padding < 8) { /* Two lots of padding: Pad the first block to 64 bytes */ - memset(p, 0, count); + memset(p, 0, padding); byte_reverse(ctx->in, 16); md5_transform(ctx->buf, (unsigned int *)ctx->in); - /* Now fill the next block with 56 bytes */ - memset(ctx->in, 0, 56); + /* Now fill the next block */ + memset(ctx->in, 0, DXBC_CHECKSUM_BLOCK_SIZE); } else { - /* Pad block to 56 bytes */ - memset(p, 0, count - 8); - } + /* Make place for bitcount at the beginning of the block */ + memmove(&ctx->in[4], ctx->in, count); - byte_reverse(ctx->in, 14); + /* Pad block to 60 bytes */ + memset(p + 4, 0, padding - 4); + } /* Append length in bits and transform */ - ((unsigned int *)ctx->in)[14] = ctx->i[0]; - ((unsigned int *)ctx->in)[15] = ctx->i[1]; + length = ctx->i[0]; + memcpy(&ctx->in[0], &length, sizeof(length)); + byte_reverse(&ctx->in[4], 14); + length = ctx->i[0] >> 2 | 0x1; + memcpy(&ctx->in[DXBC_CHECKSUM_BLOCK_SIZE - 4], &length, sizeof(length)); md5_transform(ctx->buf, (unsigned int *)ctx->in); byte_reverse((unsigned char *)ctx->buf, 4); memcpy(ctx->digest, ctx->buf, 16); } + +#define DXBC_CHECKSUM_SKIP_BYTE_COUNT 20 + +void vkd3d_compute_dxbc_checksum(const void *dxbc, size_t size, uint32_t checksum[4]) +{ + const uint8_t *ptr = dxbc; + struct md5_ctx ctx; + + assert(size > DXBC_CHECKSUM_SKIP_BYTE_COUNT); + ptr += DXBC_CHECKSUM_SKIP_BYTE_COUNT; + size -= DXBC_CHECKSUM_SKIP_BYTE_COUNT; + + md5_init(&ctx); + md5_update(&ctx, ptr, size); + dxbc_checksum_final(&ctx); + + memcpy(checksum, ctx.digest, sizeof(ctx.digest)); +} diff --git a/libs/vkd3d-shader/dxbc.c b/libs/vkd3d-shader/dxbc.c index b199749064f5..4b36ea644b84 100644 --- a/libs/vkd3d-shader/dxbc.c +++ b/libs/vkd3d-shader/dxbc.c @@ -2389,7 +2389,7 @@ static int shader_write_root_signature_header(struct root_signature_writer_conte if (!write_dword(context, TAG_DXBC)) return VKD3D_ERROR_OUT_OF_MEMORY; - WARN("DXBC checksum is not implemented.\n"); + /* The checksum is computed when all data is generated. */ if (!write_dwords(context, 4, 0x00000000)) return VKD3D_ERROR_OUT_OF_MEMORY; @@ -2596,6 +2596,7 @@ int vkd3d_shader_serialize_root_signature(const struct vkd3d_root_signature_desc { struct root_signature_writer_context context; size_t total_size, chunk_size; + uint32_t checksum[4]; int ret; TRACE("root_signature %p, version %#x, dxbc %p.\n", root_signature, version, dxbc); @@ -2628,5 +2629,8 @@ int vkd3d_shader_serialize_root_signature(const struct vkd3d_root_signature_desc dxbc->code = context.data; dxbc->size = total_size; + vkd3d_compute_dxbc_checksum(dxbc->code, dxbc->size, checksum); + memcpy((uint32_t *)dxbc->code + 1, checksum, sizeof(checksum)); + return VKD3D_OK; } diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h index e0fad6852e53..bf2f45571375 100644 --- a/libs/vkd3d-shader/vkd3d_shader_private.h +++ b/libs/vkd3d-shader/vkd3d_shader_private.h @@ -815,11 +815,7 @@ int vkd3d_dxbc_compiler_generate_spirv(struct vkd3d_dxbc_compiler *compiler, struct vkd3d_shader_code *spirv) DECLSPEC_HIDDEN; void vkd3d_dxbc_compiler_destroy(struct vkd3d_dxbc_compiler *compiler) DECLSPEC_HIDDEN; -struct md5_ctx; - -void md5_init(struct md5_ctx *ctx) DECLSPEC_HIDDEN; -void md5_update(struct md5_ctx *ctx, const unsigned char *buf, unsigned int len) DECLSPEC_HIDDEN; -void md5_final(struct md5_ctx *ctx) DECLSPEC_HIDDEN; +void vkd3d_compute_dxbc_checksum(const void *dxbc, size_t size, uint32_t checksum[4]) DECLSPEC_HIDDEN; static inline enum vkd3d_component_type vkd3d_component_type_from_data_type( enum vkd3d_data_type data_type) diff --git a/tests/d3d12.c b/tests/d3d12.c index 7d67de2966dd..314f08a2fb7a 100644 --- a/tests/d3d12.c +++ b/tests/d3d12.c @@ -9107,14 +9107,7 @@ static void test_root_signature_serialization_(unsigned int line, const DWORD *c ok_(line)(blob_size == code_size, "Got size %u, expected %u.\n", (unsigned int)blob_size, (unsigned int)code_size); - ok_(line)(blob_buffer[0] == code[0], "Got magic %#x, expected %#x.\n", - (unsigned int)blob_buffer[0], (unsigned int)code[0]); - for (i = 1; i < 5; ++i) - { - todo ok_(line)(blob_buffer[i] == code[i], "Got checksum %#x, expected %#x at %u.\n", - (unsigned int)blob_buffer[i], (unsigned int)code[i], i - 1); - } - for (; i < code_size / sizeof(DWORD); ++i) + for (i = 0; i < code_size / sizeof(DWORD); ++i) { ok_(line)(blob_buffer[i] == code[i], "Got dword %#x, expected %#x at %u.\n", (unsigned int)blob_buffer[i], (unsigned int)code[i], i); -- 2.19.2
participants (2)
-
Henri Verbeet -
Józef Kucia