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mutter/fixed-to-float-patches/clutter-alpha.c.0.patch
Robert Bragg 012b169a73 [fixed-to-float-patches] Updates the patches in line with the last merge 
Most of the patches updated weren't failing but there were a number of
hunk offsets when applying so it tidies that up. The change in
mtx_transform.0.patch has been moved to clutter-actor.c.0.patch.
2009-01-12 17:13:51 +00:00

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diff --git a/clutter/clutter-alpha.c b/clutter/clutter-alpha.c
index 60ef0d3..dda0f6c 100644
--- a/clutter/clutter-alpha.c
+++ b/clutter/clutter-alpha.c
@@ -697,6 +697,11 @@ clutter_ramp_func (ClutterAlpha *alpha,
}
}
+#if 0
+/*
+ * The following three functions are left in place for reference
+ * purposes.
+ */
static guint32
sincx1024_func (ClutterAlpha *alpha,
float angle,
@@ -716,7 +721,7 @@ sincx1024_func (ClutterAlpha *alpha,
x -= (512 * 512 / angle);
- sine = ((sinf (x * (G_PI/180.0)) + offset) / 2)
+ sine = ((cogl_angle_sin (x) + offset) / 2)
* CLUTTER_ALPHA_MAX_ALPHA;
sine = sine >> COGL_FIXED_Q;
@@ -724,11 +729,6 @@ sincx1024_func (ClutterAlpha *alpha,
return sine;
}
-#if 0
-/*
- * The following two functions are left in place for reference
- * purposes.
- */
static guint32
sincx_func (ClutterAlpha *alpha,
ClutterFixed angle,
@@ -747,7 +747,7 @@ sincx_func (ClutterAlpha *alpha,
x = CLUTTER_FIXED_MUL (x, CFX_PI)
- CLUTTER_FIXED_DIV (CFX_PI, angle);
- sine = (sinf (x) + offset) / 2;
+ sine = (cogl_angle_sin (x) + offset) / 2;
CLUTTER_NOTE (ALPHA, "sine: %2f\n", CLUTTER_FIXED_TO_DOUBLE (sine));
@@ -806,9 +806,28 @@ guint32
clutter_sine_func (ClutterAlpha *alpha,
gpointer dummy)
{
-#if 0
+#if 1
+ ClutterTimeline *timeline;
+ gint current_frame_num, n_frames;
+ float radians, sine;
+
+ timeline = clutter_alpha_get_timeline (alpha);
+
+ current_frame_num = clutter_timeline_get_current_frame (timeline);
+ n_frames = clutter_timeline_get_n_frames (timeline);
+
+ radians = ((float)current_frame_num / n_frames) * (2.0 * G_PI);
+ sine = sinf (radians);
+
+ /* shift from range [-1, 1] -> [0, 1] */
+ sine = (sine + 1.0) / 2.0;
+
+ CLUTTER_NOTE (ALPHA, "sine: %2f\n", sine);
+
+ return sine * CLUTTER_ALPHA_MAX_ALPHA;
+#elif 0
return sinc_func (alpha, 2.0, 1.0);
-#else
+#elif 0
/* 2.0 above represents full circle */
return sincx1024_func (alpha, 1024, 1.0);
#endif
@@ -842,18 +861,17 @@ clutter_sine_inc_func (ClutterAlpha *alpha,
ClutterTimeline * timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- x = 256 * frame / n_frames;
-
- sine = sinf (x * (G_PI/180.0)) * CLUTTER_ALPHA_MAX_ALPHA;
+ radians = ((float)frame / n_frames) * (G_PI / 2);
+ sine = sinf (radians);
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -884,18 +902,17 @@ clutter_sine_dec_func (ClutterAlpha *alpha,
ClutterTimeline * timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- x = 256 * frame / n_frames + 256;
-
- sine = sinf (x * (G_PI/180.0)) * CLUTTER_ALPHA_MAX_ALPHA;
+ radians = ((float)frame / n_frames) * (G_PI / 2);
+ sine = sinf (radians + (G_PI / 2));
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -926,18 +943,17 @@ clutter_sine_half_func (ClutterAlpha *alpha,
ClutterTimeline *timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- x = 512 * frame / n_frames;
+ radians = ((float)frame / n_frames) * G_PI;
+ sine = sinf (radians);
- sine = sinf (x * (G_PI/180.0)) * CLUTTER_ALPHA_MAX_ALPHA;
-
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -962,19 +978,20 @@ clutter_sine_in_func (ClutterAlpha *alpha,
ClutterTimeline *timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- /* XXX- if we use 768 we overflow */
- x = 256 * frame / n_frames + 767;
+ radians = ((float)frame / n_frames) * (G_PI / 2);
+ sine = sinf (radians - (G_PI / 2));
- sine = (sinf (x * (G_PI/180.0)) + 1) * CLUTTER_ALPHA_MAX_ALPHA;
+ /* shift from range [-1, 0] -> [0, 1] */
+ sine = sine + 1.0;
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -998,18 +1015,17 @@ clutter_sine_out_func (ClutterAlpha *alpha,
ClutterTimeline *timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- x = 256 * frame / n_frames;
-
- sine = sinf (x * (G_PI/180.0)) * CLUTTER_ALPHA_MAX_ALPHA;
+ radians = ((float)frame / n_frames) * (G_PI / 2);
+ sine = sinf (radians);
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -1034,18 +1050,20 @@ clutter_sine_in_out_func (ClutterAlpha *alpha,
ClutterTimeline *timeline;
gint frame;
gint n_frames;
- float x;
- ClutterFixed sine;
+ float radians;
+ float sine;
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- x = -256 * frame / n_frames + 256;
+ radians = ((float)frame / n_frames) * G_PI;
+ sine = sinf (radians - (G_PI / 2));
- sine = (sinf (x * (G_PI/180.0)) + 1) / 2 * CLUTTER_ALPHA_MAX_ALPHA;
+ /* shift from range [-1, 1] -> [0, 1] */
+ sine = (sine + 1.0) / 2.0;
- return ((guint32) sine) >> COGL_FIXED_Q;
+ return (guint32) (sine * CLUTTER_ALPHA_MAX_ALPHA);
}
/**
@@ -1113,30 +1131,23 @@ clutter_smoothstep_inc_func (ClutterAlpha *alpha,
ClutterTimeline *timeline;
gint frame;
gint n_frames;
- guint32 r;
- guint32 x;
+ float r;
+ float x;
/*
* The smoothstep function uses f(x) = -2x^3 + 3x^2 where x is from <0,1>,
- * and precission is critical -- we use 8.24 fixed format for this operation.
- * The earlier operations involve division, which we cannot do in 8.24 for
- * numbers in <0,1> we use ClutterFixed.
+ * and precission is critical.
*/
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
n_frames = clutter_timeline_get_n_frames (timeline);
- /*
- * Convert x to 8.24 for next step.
- */
- x = CLUTTER_FIXED_DIV (frame, n_frames) << 8;
+ x = (float)frame / n_frames;
/*
* f(x) = -2x^3 + 3x^2
- *
- * Convert result to ClutterFixed to avoid overflow in next step.
*/
- r = ((x >> 12) * (x >> 12) * 3 - (x >> 15) * (x >> 16) * (x >> 16)) >> 8;
+ r = -2 * x * x * x + 3 * x * x;
return (r * CLUTTER_ALPHA_MAX_ALPHA);
}
@@ -1204,9 +1215,9 @@ clutter_exp_inc_func (ClutterAlpha *alpha,
*
* (2^x_alpha_max) - 1 == CLUTTER_ALPHA_MAX_ALPHA
*/
-#if CLUTTER_ALPHA_MAX_ALPHA != 0xffff
-#error Adjust x_alpha_max to match CLUTTER_ALPHA_MAX_ALPHA
-#endif
+ /* XXX: If this fails:
+ * Adjust x_alpha_max to match CLUTTER_ALPHA_MAX_ALPHA */
+ g_assert (CLUTTER_ALPHA_MAX_ALPHA == 65535.0);
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
@@ -1214,7 +1225,7 @@ clutter_exp_inc_func (ClutterAlpha *alpha,
x = x_alpha_max * frame / n_frames;
- result = CLAMP (pow2f (x) - 1, 0, CLUTTER_ALPHA_MAX_ALPHA);
+ result = CLAMP (powf (2, x) - 1, 0, CLUTTER_ALPHA_MAX_ALPHA);
return result;
}
@@ -1255,9 +1266,9 @@ clutter_exp_dec_func (ClutterAlpha *alpha,
*
* (2^x_alpha_max) - 1 == CLUTTER_ALPHA_MAX_ALPHA
*/
-#if CLUTTER_ALPHA_MAX_ALPHA != 0xffff
-#error Adjust x_alpha_max to match CLUTTER_ALPHA_MAX_ALPHA
-#endif
+ /* XXX: If this fails:
+ * Adjust x_alpha_max to match CLUTTER_ALPHA_MAX_ALPHA */
+ g_assert (CLUTTER_ALPHA_MAX_ALPHA == 65535.0);
timeline = clutter_alpha_get_timeline (alpha);
frame = clutter_timeline_get_current_frame (timeline);
@@ -1265,7 +1276,7 @@ clutter_exp_dec_func (ClutterAlpha *alpha,
x = (x_alpha_max * (n_frames - frame)) / n_frames;
- result = CLAMP (pow2f (x) - 1, 0, CLUTTER_ALPHA_MAX_ALPHA);
+ result = CLAMP (powf (2, x) - 1, 0, CLUTTER_ALPHA_MAX_ALPHA);
return result;
}
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