wined3d: Introduce wined3d_mask_from_size().

dlls/wined3d/surface.c

@@ -36,11 +36,11 @@ WINE_DECLARE_DEBUG_CHANNEL(d3d_perf);
 static const DWORD surface_simple_locations = WINED3D_LOCATION_SYSMEM | WINED3D_LOCATION_BUFFER;
 
 /* Works correctly only for <= 4 bpp formats. */
-static void get_color_masks(const struct wined3d_format *format, DWORD *masks)
+static void get_color_masks(const struct wined3d_format *format, uint32_t *masks)
 {
-    masks[0] = ((1u << format->red_size) - 1) << format->red_offset;
-    masks[1] = ((1u << format->green_size) - 1) << format->green_offset;
-    masks[2] = ((1u << format->blue_size) - 1) << format->blue_offset;
+    masks[0] = wined3d_mask_from_size(format->red_size) << format->red_offset;
+    masks[1] = wined3d_mask_from_size(format->green_size) << format->green_offset;
+    masks[2] = wined3d_mask_from_size(format->blue_size) << format->blue_offset;
 }
 
 /* See also float_16_to_32() in wined3d_private.h */

dlls/wined3d/utils.c

@@ -5902,7 +5902,7 @@ DWORD wined3d_format_convert_from_float(const struct wined3d_format *format, con
 
 static float color_to_float(DWORD color, DWORD size, DWORD offset)
 {
-    DWORD mask = size < 32 ? (1u << size) - 1 : ~0u;
+    uint32_t mask = wined3d_mask_from_size(size);
 
     if (!size)
         return 1.0f;
@@ -5938,10 +5938,10 @@ void wined3d_format_get_float_color_key(const struct wined3d_format *format,
         case WINED3DFMT_R8G8B8X8_UNORM:
         case WINED3DFMT_R16G16_UNORM:
         case WINED3DFMT_B10G10R10A2_UNORM:
-            slop.r = 0.5f / ((1u << format->red_size) - 1);
-            slop.g = 0.5f / ((1u << format->green_size) - 1);
-            slop.b = 0.5f / ((1u << format->blue_size) - 1);
-            slop.a = 0.5f / ((1u << format->alpha_size) - 1);
+            slop.r = 0.5f / wined3d_mask_from_size(format->red_size);
+            slop.g = 0.5f / wined3d_mask_from_size(format->green_size);
+            slop.b = 0.5f / wined3d_mask_from_size(format->blue_size);
+            slop.a = 0.5f / wined3d_mask_from_size(format->alpha_size);
 
             float_colors[0].r = color_to_float(key->color_space_low_value, format->red_size, format->red_offset)
                     - slop.r;

dlls/wined3d/wined3d_private.h

@@ -5959,6 +5959,11 @@ static inline BOOL is_rasterization_disabled(const struct wined3d_shader *geomet
             && geometry_shader->u.gs.so_desc->rasterizer_stream_idx == WINED3D_NO_RASTERIZER_STREAM;
 }
 
+static inline uint32_t wined3d_mask_from_size(unsigned int size)
+{
+    return size < 32 ? (1u << size) - 1 : ~0u;
+}
+
 static inline DWORD wined3d_extract_bits(const DWORD *bitstream,
         unsigned int offset, unsigned int count)
 {