d3d10: Add some code for parsing DXBC data.

dlls/d3d10/d3d10_main.c

@@ -2,6 +2,7 @@
  * Direct3D 10
  *
  * Copyright 2007 Andras Kovacs
+ * Copyright 2009 Henri Verbeet for CodeWeavers
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -209,6 +210,7 @@ HRESULT WINAPI D3D10CreateEffectFromMemory(void *data, SIZE_T data_size, UINT fl
         ID3D10Device *device, ID3D10EffectPool *effect_pool, ID3D10Effect **effect)
 {
     struct d3d10_effect *object;
+    HRESULT hr;
 
     FIXME("data %p, data_size %lu, flags %#x, device %p, effect_pool %p, effect %p stub!\n",
             data, data_size, flags, device, effect_pool, effect);
@@ -223,6 +225,14 @@ HRESULT WINAPI D3D10CreateEffectFromMemory(void *data, SIZE_T data_size, UINT fl
     object->vtbl = &d3d10_effect_vtbl;
     object->refcount = 1;
 
+    hr = d3d10_effect_parse(object, data, data_size);
+    if (FAILED(hr))
+    {
+        ERR("Failed to parse effect\n");
+        IUnknown_Release((IUnknown *)object);
+        return hr;
+    }
+
     *effect = (ID3D10Effect *)object;
 
     TRACE("Created ID3D10Effect %p\n", object);

dlls/d3d10/d3d10_private.h

@@ -39,6 +39,8 @@ struct d3d10_effect
     LONG refcount;
 };
 
+HRESULT d3d10_effect_parse(struct d3d10_effect *This, const void *data, SIZE_T data_size);
+
 /* D3D10Core */
 HRESULT WINAPI D3D10CoreCreateDevice(IDXGIFactory *factory, IDXGIAdapter *adapter,
         UINT flags, DWORD unknown0, ID3D10Device **device);

dlls/d3d10/effect.c

@@ -24,6 +24,110 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(d3d10);
 
+#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')
+
+static inline void read_dword(const char **ptr, DWORD *d)
+{
+    memcpy(d, *ptr, sizeof(d));
+    *ptr += sizeof(d);
+}
+
+static inline 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);
+    }
+}
+
+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';
+}
+
+static HRESULT parse_dxbc(const char *data, SIZE_T data_size,
+        HRESULT (*chunk_handler)(const char *data, 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_offset;
+
+        read_dword(&ptr, &chunk_offset);
+        TRACE("chunk %u at offset %#x\n", i, chunk_offset);
+
+        hr = chunk_handler(data + chunk_offset, ctx);
+        if (FAILED(hr)) break;
+    }
+
+    return hr;
+}
+
+static HRESULT fx10_chunk_handler(const char *data, void *ctx)
+{
+    const char *ptr = data;
+    DWORD chunk_size;
+    char tag_str[5];
+    DWORD tag;
+
+    read_tag(&ptr, &tag, tag_str);
+    TRACE("tag: %s\n", tag_str);
+
+    read_dword(&ptr, &chunk_size);
+    TRACE("chunk size: %#x\n", chunk_size);
+
+    switch(tag)
+    {
+        default:
+            FIXME("Unhandled chunk %s\n", tag_str);
+            break;
+    }
+
+    return S_OK;
+}
+
+HRESULT d3d10_effect_parse(struct d3d10_effect *This, const void *data, SIZE_T data_size)
+{
+    return parse_dxbc(data, data_size, fx10_chunk_handler, This);
+}
+
 /* IUnknown methods */
 
 static HRESULT STDMETHODCALLTYPE d3d10_effect_QueryInterface(ID3D10Effect *iface, REFIID riid, void **object)