Zebediah Figura : wined3d: Parse ISG1, PSG1 and OSG1 signatures.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 8a34f089e080299750b413283f1918ef3ab4bdd8
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=8a34f089e080299750b413283f1918ef3ab4bdd8

Author: Zebediah Figura <zfigura at codeweavers.com>
Date:   Mon Nov  8 19:44:42 2021 -0600

wined3d: Parse ISG1, PSG1 and OSG1 signatures.

These signatures extend the OSG5 format by a minimum precision hint, which gets
ignored for now but could be implemented using 16-bit floats in the future.

Fixes some shader parsing errors in Resident Evil 2.

Based on a vkd3d patch by Philip Rebohle.

Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/wined3d/shader_sm4.c | 21 ++++++++++++++++++---
 include/wine/wined3d.h    |  1 +
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/dlls/wined3d/shader_sm4.c b/dlls/wined3d/shader_sm4.c
index 4635910269f..005be96a51f 100644
--- a/dlls/wined3d/shader_sm4.c
+++ b/dlls/wined3d/shader_sm4.c
@@ -1820,10 +1820,13 @@ const struct wined3d_shader_frontend sm4_shader_frontend =
 
 #define TAG_AON9 WINEMAKEFOURCC('A', 'o', 'n', '9')
 #define TAG_DXBC WINEMAKEFOURCC('D', 'X', 'B', 'C')
+#define TAG_ISG1 WINEMAKEFOURCC('I', 'S', 'G', '1')
 #define TAG_ISGN WINEMAKEFOURCC('I', 'S', 'G', 'N')
+#define TAG_OSG1 WINEMAKEFOURCC('O', 'S', 'G', '1')
 #define TAG_OSG5 WINEMAKEFOURCC('O', 'S', 'G', '5')
 #define TAG_OSGN WINEMAKEFOURCC('O', 'S', 'G', 'N')
 #define TAG_PCSG WINEMAKEFOURCC('P', 'C', 'S', 'G')
+#define TAG_PSG1 WINEMAKEFOURCC('P', 'S', 'G', '1')
 #define TAG_SHDR WINEMAKEFOURCC('S', 'H', 'D', 'R')
 #define TAG_SHEX WINEMAKEFOURCC('S', 'H', 'E', 'X')
 
@@ -1955,6 +1958,7 @@ static HRESULT shader_parse_signature(DWORD tag, const char *data, DWORD data_si
         struct wined3d_shader_signature *s)
 {
     struct wined3d_shader_signature_element *e;
+    bool has_stream_index, has_min_precision;
     const char *ptr = data;
     unsigned int i;
     DWORD count;
@@ -1982,11 +1986,14 @@ static HRESULT shader_parse_signature(DWORD tag, const char *data, DWORD data_si
         return E_OUTOFMEMORY;
     }
 
+    has_min_precision = tag == TAG_OSG1 || tag == TAG_PSG1 || tag == TAG_ISG1;
+    has_stream_index = tag == TAG_OSG5 || has_min_precision;
+
     for (i = 0; i < count; ++i)
     {
         DWORD name_offset;
 
-        if (tag == TAG_OSG5)
+        if (has_stream_index)
             read_dword(&ptr, &e[i].stream_idx);
         else
             e[i].stream_idx = 0;
@@ -2003,10 +2010,15 @@ static HRESULT shader_parse_signature(DWORD tag, const char *data, DWORD data_si
         read_dword(&ptr, &e[i].register_idx);
         read_dword(&ptr, &e[i].mask);
 
+        if (has_min_precision)
+            read_dword(&ptr, &e[i].min_precision);
+        else
+            e[i].min_precision = 0;
+
         TRACE("Stream: %u, semantic: %s, semantic idx: %u, sysval_semantic %#x, "
-                "type %u, register idx: %u, use_mask %#x, input_mask %#x.\n",
+                "type %u, register idx: %u, use_mask %#x, input_mask %#x, min_precision %u.\n",
                 e[i].stream_idx, debugstr_a(e[i].semantic_name), e[i].semantic_idx, e[i].sysval_semantic,
-                e[i].component_type, e[i].register_idx, (e[i].mask >> 8) & 0xff, e[i].mask & 0xff);
+                e[i].component_type, e[i].register_idx, (e[i].mask >> 8) & 0xff, e[i].mask & 0xff, e[i].min_precision);
     }
 
     s->elements = e;
@@ -2024,6 +2036,7 @@ static HRESULT shader_dxbc_chunk_handler(const char *data, DWORD data_size, DWOR
     switch (tag)
     {
         case TAG_ISGN:
+        case TAG_ISG1:
             if (ctx->max_version < 4)
             {
                 TRACE("Skipping shader input signature.\n");
@@ -2039,6 +2052,7 @@ static HRESULT shader_dxbc_chunk_handler(const char *data, DWORD data_size, DWOR
             break;
 
         case TAG_OSGN:
+        case TAG_OSG1:
         case TAG_OSG5:
             if (ctx->max_version < 4)
             {
@@ -2055,6 +2069,7 @@ static HRESULT shader_dxbc_chunk_handler(const char *data, DWORD data_size, DWOR
             break;
 
         case TAG_PCSG:
+        case TAG_PSG1:
             if (shader->patch_constant_signature.elements)
             {
                 FIXME("Multiple patch constant signatures.\n");
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 7a6588ea4f4..1fdbd105cc4 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -2107,6 +2107,7 @@ struct wined3d_shader_signature_element
     enum wined3d_component_type component_type;
     unsigned int register_idx;
     DWORD mask;
+    unsigned int min_precision;
 };
 
 struct wined3d_shader_signature