[PATCH 1/1] wined3d: support direct3d shader model 1,2,3

[fanwenjie]

From: fanwenjie

---
 dlls/wined3d/shader_spirv.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/dlls/wined3d/shader_spirv.c b/dlls/wined3d/shader_spirv.c
index fe1cc03e9f4..e12dfe250df 100644
--- a/dlls/wined3d/shader_spirv.c
+++ b/dlls/wined3d/shader_spirv.c
@@ -244,6 +244,25 @@ static void shader_spirv_init_shader_interface_vk(struct wined3d_shader_spirv_sh
     iface->vkd3d_interface.uav_counter_count = b->uav_counter_count;
 }

+/* test type of shader source by magic number (first 4 bytes of shader source) */
+static enum vkd3d_shader_source_type shader_spirv_get_source_type(unsigned int magic)
+{
+    if ((magic & 0xFFFF) < 0x400)
+    {
+        /* value of second byte is less than 4 for Direct3D shader model 1, 2, and 3 shaders */
+        return VKD3D_SHADER_SOURCE_D3D_BYTECODE;
+    }
+    else if (0x43425844 == magic)
+    {
+        /* values of first 4 bytes are 'D', 'X', 'B', 'C' for Direct3D shader model 4 and 5 shaders */
+        return VKD3D_SHADER_SOURCE_DXBC_TPF;
+    }
+    else
+    {
+        return VKD3D_SHADER_SOURCE_HLSL;
+    }
+}
+
 static VkShaderModule shader_spirv_compile_shader(struct wined3d_context_vk *context_vk,
         const struct wined3d_shader_desc *shader_desc, enum wined3d_shader_type shader_type,
         const struct shader_spirv_compile_arguments *args, const struct shader_spirv_resource_bindings *bindings,
@@ -269,7 +288,7 @@ static VkShaderModule shader_spirv_compile_shader(struct wined3d_context_vk *con
     info.next = &compile_args.spirv_target;
     info.source.code = shader_desc->byte_code;
     info.source.size = shader_desc->byte_code_size;
-    info.source_type = VKD3D_SHADER_SOURCE_DXBC_TPF;
+    info.source_type = shader_spirv_get_source_type(*(unsigned int*)info.source.code);
     info.target_type = VKD3D_SHADER_TARGET_SPIRV_BINARY;
     info.options = spirv_compile_options;
     info.option_count = ARRAY_SIZE(spirv_compile_options);
@@ -708,7 +727,7 @@ static void shader_spirv_scan_shader(struct wined3d_shader *shader,
     info.next = descriptor_info;
     info.source.code = shader->byte_code;
     info.source.size = shader->byte_code_size;
-    info.source_type = VKD3D_SHADER_SOURCE_DXBC_TPF;
+    info.source_type = shader_spirv_get_source_type(*(unsigned int*)info.source.code);
     info.target_type = VKD3D_SHADER_TARGET_SPIRV_BINARY;
     info.options = spirv_compile_options;
     info.option_count = ARRAY_SIZE(spirv_compile_options);