[PATCH 2/5] wined3d: Introduce wined3d_colour_srgb_from_linear().

[Henri Verbeet]

Signed-off-by: Henri Verbeet <hverbeet(a)codeweavers.com>
---
 dlls/wined3d/device.c          | 22 ++++------------------
 dlls/wined3d/wined3d_private.h | 26 +++++++++++++++++++++++---
 2 files changed, 27 insertions(+), 21 deletions(-)

diff --git a/dlls/wined3d/device.c b/dlls/wined3d/device.c
index 81a6d3ab36c..7f1a98f51b4 100644
--- a/dlls/wined3d/device.c
+++ b/dlls/wined3d/device.c
@@ -291,7 +291,7 @@ void device_clear_render_targets(struct wined3d_device *device, UINT rt_count, c
     struct wined3d_context_gl *context_gl;
     struct wined3d_texture *target = NULL;
     UINT drawable_width, drawable_height;
-    struct wined3d_color corrected_color;
+    struct wined3d_color colour_srgb;
     struct wined3d_context *context;
     GLbitfield clear_mask = 0;
     BOOL render_offscreen;
@@ -430,25 +430,11 @@ void device_clear_render_targets(struct wined3d_device *device, UINT rt_count, c
         if (!gl_info->supported[ARB_FRAMEBUFFER_SRGB] && needs_srgb_write(context, state, fb))
         {
             if (rt_count > 1)
-                WARN("Clearing multiple sRGB render targets with no GL_ARB_framebuffer_sRGB "
+                WARN("Clearing multiple sRGB render targets without GL_ARB_framebuffer_sRGB "
                         "support, this might cause graphical issues.\n");
 
-            corrected_color.r = color->r < wined3d_srgb_const1[0]
-                    ? color->r * wined3d_srgb_const0[3]
-                    : pow(color->r, wined3d_srgb_const0[0]) * wined3d_srgb_const0[1]
-                    - wined3d_srgb_const0[2];
-            corrected_color.r = min(max(corrected_color.r, 0.0f), 1.0f);
-            corrected_color.g = color->g < wined3d_srgb_const1[0]
-                    ? color->g * wined3d_srgb_const0[3]
-                    : pow(color->g, wined3d_srgb_const0[0]) * wined3d_srgb_const0[1]
-                    - wined3d_srgb_const0[2];
-            corrected_color.g = min(max(corrected_color.g, 0.0f), 1.0f);
-            corrected_color.b = color->b < wined3d_srgb_const1[0]
-                    ? color->b * wined3d_srgb_const0[3]
-                    : pow(color->b, wined3d_srgb_const0[0]) * wined3d_srgb_const0[1]
-                    - wined3d_srgb_const0[2];
-            corrected_color.b = min(max(corrected_color.b, 0.0f), 1.0f);
-            color = &corrected_color;
+            wined3d_colour_srgb_from_linear(&colour_srgb, color);
+            color = &colour_srgb;
         }
 
         gl_info->gl_ops.gl.p_glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 71e4d712314..68250f0be38 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -1482,6 +1482,29 @@ static inline void wined3d_color_from_d3dcolor(struct wined3d_color *wined3d_col
     wined3d_color->a = D3DCOLOR_B_A(d3d_color) / 255.0f;
 }
 
+extern const float wined3d_srgb_const0[] DECLSPEC_HIDDEN;
+extern const float wined3d_srgb_const1[] DECLSPEC_HIDDEN;
+
+static inline float wined3d_srgb_from_linear(float colour)
+{
+    if (colour < 0.0f)
+        return 0.0f;
+    if (colour < wined3d_srgb_const1[0])
+        return colour * wined3d_srgb_const0[3];
+    if (colour < 1.0f)
+        return wined3d_srgb_const0[1] * powf(colour, wined3d_srgb_const0[0]) - wined3d_srgb_const0[2];
+    return 1.0f;
+}
+
+static inline void wined3d_colour_srgb_from_linear(struct wined3d_color *colour_srgb,
+        const struct wined3d_color *colour)
+{
+    colour_srgb->r = wined3d_srgb_from_linear(colour->r);
+    colour_srgb->g = wined3d_srgb_from_linear(colour->g);
+    colour_srgb->b = wined3d_srgb_from_linear(colour->b);
+    colour_srgb->a = colour->a;
+}
+
 #define WINED3D_HIGHEST_TRANSFORM_STATE WINED3D_TS_WORLD_MATRIX(255) /* Highest value in wined3d_transform_state. */
 
 void wined3d_check_gl_call(const struct wined3d_gl_info *gl_info,
@@ -2978,9 +3001,6 @@ const struct ffp_frag_desc *find_ffp_frag_shader(const struct wine_rb_tree *frag
 void add_ffp_frag_shader(struct wine_rb_tree *shaders, struct ffp_frag_desc *desc) DECLSPEC_HIDDEN;
 void wined3d_ftoa(float value, char *s) DECLSPEC_HIDDEN;
 
-extern const float wined3d_srgb_const0[] DECLSPEC_HIDDEN;
-extern const float wined3d_srgb_const1[] DECLSPEC_HIDDEN;
-
 enum wined3d_ffp_vs_fog_mode
 {
     WINED3D_FFP_VS_FOG_OFF      = 0,
-- 
2.11.0