wined3d: Implement r5g6b5 to x8r8g8b8 function.

[Mike Ruprecht]

 dlls/wined3d/surface_base.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/dlls/wined3d/surface_base.c b/dlls/wined3d/surface_base.c
index 9ee5c75..8596499 100644
--- a/dlls/wined3d/surface_base.c
+++ b/dlls/wined3d/surface_base.c
@@ -702,6 +702,25 @@ static void convert_r32f_r16f(const BYTE *src, BYTE *dst, DWORD pitch_in, DWORD
     }
 }
 
+static void convert_r5g6b5_x8r8g8b8(const BYTE *src, BYTE *dst, DWORD pitch_in, DWORD pitch_out,
+                             unsigned int w, unsigned int h) {
+    unsigned int x, y;
+    const unsigned short *src_s;
+    unsigned int *dst_u;
+    unsigned short src_x;
+
+    TRACE("Converting %dx%d pixels, pitches %d %d\n", w, h, pitch_in, pitch_out);
+    for(y = 0; y < h; y++) {
+        src_s = (unsigned short *) (src + y * pitch_in);
+        dst_u = (unsigned int *) (dst + y * pitch_out);
+        for(x = 0; x < w; x++) {
+            src_x = *(src_s + x);
+            dst_u[x] = 0xFF000000 | (src_x & 0xF800) << 8 |
+                       (src_x & 0x07E0) << 5 | (src_x & 0x001F) << 3;
+        }
+    }
+}
+
 struct d3dfmt_convertor_desc {
     WINED3DFORMAT from, to;
     void (*convert)(const BYTE *src, BYTE *dst, DWORD pitch_in, DWORD pitch_out, unsigned int w, unsigned int h);
@@ -710,6 +729,7 @@ struct d3dfmt_convertor_desc {
 static const struct d3dfmt_convertor_desc convertors[] =
 {
     {WINED3DFMT_R32F,       WINED3DFMT_R16F,        convert_r32f_r16f},
+    {WINED3DFMT_R5G6B5,     WINED3DFMT_X8R8G8B8,    convert_r5g6b5_x8r8g8b8},
 };
 
 static inline const struct d3dfmt_convertor_desc *find_convertor(WINED3DFORMAT from, WINED3DFORMAT to)