Henri Verbeet : d3d10core: Add a DXBC parser.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 7c3fa5d76d1de49842f791a94bf329182d7bc275
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=7c3fa5d76d1de49842f791a94bf329182d7bc275

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Mon Mar 30 11:24:54 2009 +0200

d3d10core: Add a DXBC parser.

We may want to push this into either wined3d or our future shader compiler
dll. It's not a whole lot of code though.

---

 dlls/d3d10core/d3d10core_private.h |   23 +++++++++++++
 dlls/d3d10core/utils.c             |   65 ++++++++++++++++++++++++++++++++++++
 2 files changed, 88 insertions(+), 0 deletions(-)

diff --git a/dlls/d3d10core/d3d10core_private.h b/dlls/d3d10core/d3d10core_private.h
index 9703821..ff723ba 100644
--- a/dlls/d3d10core/d3d10core_private.h
+++ b/dlls/d3d10core/d3d10core_private.h
@@ -34,6 +34,11 @@
 #include "wine/wined3d.h"
 #include "wine/winedxgi.h"
 
+#define MAKE_TAG(ch0, ch1, ch2, ch3) \
+    ((DWORD)(ch0) | ((DWORD)(ch1) << 8) | \
+    ((DWORD)(ch2) << 16) | ((DWORD)(ch3) << 24 ))
+#define TAG_DXBC MAKE_TAG('D', 'X', 'B', 'C')
+
 /* TRACE helper functions */
 const char *debug_d3d10_primitive_topology(D3D10_PRIMITIVE_TOPOLOGY topology);
 const char *debug_dxgi_format(DXGI_FORMAT format);
@@ -41,6 +46,24 @@ const char *debug_dxgi_format(DXGI_FORMAT format);
 DXGI_FORMAT dxgi_format_from_wined3dformat(WINED3DFORMAT format);
 WINED3DFORMAT wined3dformat_from_dxgi_format(DXGI_FORMAT format);
 
+static inline void read_dword(const char **ptr, DWORD *d)
+{
+    memcpy(d, *ptr, sizeof(*d));
+    *ptr += sizeof(*d);
+}
+
+void skip_dword_unknown(const char **ptr, unsigned int count);
+
+static inline void read_tag(const char **ptr, DWORD *t, char t_str[5])
+{
+    read_dword(ptr, t);
+    memcpy(t_str, t, 4);
+    t_str[4] = '\0';
+}
+
+HRESULT parse_dxbc(const char *data, SIZE_T data_size,
+        HRESULT (*chunk_handler)(const char *data, DWORD data_size, DWORD tag, void *ctx), void *ctx);
+
 /* IDirect3D10Device */
 extern const struct ID3D10DeviceVtbl d3d10_device_vtbl;
 extern const struct IUnknownVtbl d3d10_device_inner_unknown_vtbl;
diff --git a/dlls/d3d10core/utils.c b/dlls/d3d10core/utils.c
index b3e5fef..29f1e7a 100644
--- a/dlls/d3d10core/utils.c
+++ b/dlls/d3d10core/utils.c
@@ -344,3 +344,68 @@ WINED3DFORMAT wined3dformat_from_dxgi_format(DXGI_FORMAT format)
             return WINED3DFMT_UNKNOWN;
     }
 }
+
+void skip_dword_unknown(const char **ptr, unsigned int count)
+{
+    unsigned int i;
+    DWORD d;
+
+    FIXME("Skipping %u unknown DWORDs:\n", count);
+    for (i = 0; i < count; ++i)
+    {
+        read_dword(ptr, &d);
+        FIXME("\t0x%08x\n", d);
+    }
+}
+
+HRESULT parse_dxbc(const char *data, SIZE_T data_size,
+        HRESULT (*chunk_handler)(const char *data, DWORD data_size, DWORD tag, void *ctx), void *ctx)
+{
+    const char *ptr = data;
+    HRESULT hr = S_OK;
+    DWORD chunk_count;
+    DWORD total_size;
+    char tag_str[5];
+    unsigned int i;
+    DWORD tag;
+
+    read_tag(&ptr, &tag, tag_str);
+    TRACE("tag: %s\n", tag_str);
+
+    if (tag != TAG_DXBC)
+    {
+        WARN("Wrong tag.\n");
+        return E_FAIL;
+    }
+
+    /* checksum? */
+    skip_dword_unknown(&ptr, 4);
+
+    skip_dword_unknown(&ptr, 1);
+
+    read_dword(&ptr, &total_size);
+    TRACE("total size: %#x\n", total_size);
+
+    read_dword(&ptr, &chunk_count);
+    TRACE("chunk count: %#x\n", chunk_count);
+
+    for (i = 0; i < chunk_count; ++i)
+    {
+        DWORD chunk_tag, chunk_size;
+        const char *chunk_ptr;
+        DWORD chunk_offset;
+
+        read_dword(&ptr, &chunk_offset);
+        TRACE("chunk %u at offset %#x\n", i, chunk_offset);
+
+        chunk_ptr = data + chunk_offset;
+
+        read_dword(&chunk_ptr, &chunk_tag);
+        read_dword(&chunk_ptr, &chunk_size);
+
+        hr = chunk_handler(chunk_ptr, chunk_size, chunk_tag, ctx);
+        if (FAILED(hr)) break;
+    }
+
+    return hr;
+}