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[test-cogl-vertex-buffer] Use clutter_color_from_hls instead of hsl_to_rgb

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There is no need for a custom hsl to rgb converter since Clutter implements
this logic; originally it wasn't quite as optimal, but that has now been
fixed.
This commit is contained in:
Robert Bragg 2009-03-17 00:26:38 +00:00
parent bb93a98762
commit b5a35a0f0b
1 changed files with 2 additions and 62 deletions
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64
tests/interactive/test-cogl-vertex-buffer.c
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@ -41,8 +41,6 @@
#define HSL_OFFSET 0.5 /* the hue that we map an amplitude of 0 too */
#define HSL_SCALE 0.25
#define USE_CLUTTER_COLOR 1
typedef struct _TestState
{
ClutterActor *dummy;
@ -54,62 +52,6 @@ typedef struct _TestState
ClutterTimeline *timeline;
} TestState;
#ifndef USE_CLUTTER_COLOR
/* This algorithm is adapted from the book:
* Fundamentals of Interactive Computer Graphics by Foley and van Dam
*/
static void
hsl_to_rgb (float h, float s, float l,
GLubyte *r, GLubyte *g, GLubyte *b)
{
float tmp1, tmp2;
float tmp3[3];
float clr[3];
int i;
if (l == 0)
{
*r = *g = *b = 0;
return;
}
if (s == 0)
{
*r = *g = *b = l;
return;
}
tmp2 = ((l <= 0.5) ? l * (1.0 + s) : l + s - (l * s));
tmp1 = 2.0 * l - tmp2;
tmp3[0] = h + 1.0 / 3.0;
tmp3[1] = h;
tmp3[2] = h - 1.0 / 3.0;
for (i = 0; i < 3; i++)
{
if (tmp3[i] < 0)
tmp3[i] += 1.0;
if (tmp3[i] > 1)
tmp3[i] -= 1.0;
if (6.0 * tmp3[i] < 1.0)
clr[i] = tmp1 + (tmp2 - tmp1) * tmp3[i] * 6.0;
else if (2.0 * tmp3[i] < 1.0)
clr[i] = tmp2;
else if (3.0 * tmp3[i] < 2.0)
clr[i] = (tmp1 + (tmp2 - tmp1) * ((2.0 / 3.0) - tmp3[i]) * 6.0);
else
clr[i] = tmp1;
}
*r = clr[0] * 255.0;
*g = clr[1] * 255.0;
*b = clr[2] * 255.0;
}
#endif
static void
frame_cb (ClutterTimeline *timeline,
gint frame_num,
@ -156,11 +98,9 @@ frame_cb (ClutterTimeline *timeline,
s = 0.5;
l = 0.25 + (period_progress_sin + 1.0) / 4.0;
color = &state->quad_mesh_colors[4 * vert_index];
#ifdef USE_CLUTTER_COLOR
/* A bit of a sneaky cast, but it seems safe to assume the ClutterColor
* typedef is set in stone... */
clutter_color_from_hls ((ClutterColor *)color, h * 360.0, l, s);
#else
hsl_to_rgb (h, s, l, &color[0], &color[1], &color[2]);
#endif
}
cogl_vertex_buffer_add (state->buffer,