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am a9fa7b25: Merge "save 2ms replace div with mul." into jb-mr1-dev

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* commit 'a9fa7b25ddefc3ba4cbf30ce05453d5e3459dbe1':
  save 2ms replace div with mul.
This commit is contained in:
Jason Sams
2012-07-31 15:32:05 -07:00
committed by Android Git Automerger
parent d5b7c9551b a9fa7b25dd
commit 1e6b7a6462
1 changed files with 7 additions and 5 deletions
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12
tests/RenderScriptTests/ImageProcessing/src/com/android/rs/image/vignette.rsh
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@@ -17,6 +17,7 @@
static float2 scale;
static float2 center, dimensions;
static float range, inv_max_dist, shade, slope;
static float2 overDimensions;
void init_vignette(uint32_t dim_x, uint32_t dim_y, float center_x, float center_y,
float desired_scale, float desired_shade, float desired_slope) {
@@ -43,20 +44,21 @@ void init_vignette(uint32_t dim_x, uint32_t dim_y, float center_x, float center_
range = 1.3 - 0.7*sqrt(desired_scale);
shade = desired_shade;
slope = desired_slope;
overDimensions = ((float2)1.f) / dimensions;
}
void root(const uchar4 *in, uchar4 *out, uint32_t x, uint32_t y) {
// Convert x and y to floating point coordinates with center as origin
const float4 fin = rsUnpackColor8888(*in);
float2 coord;
coord.x = (float)x / dimensions.x;
coord.y = (float)y / dimensions.y;
const float4 fin = convert_float4(*in);
float2 coord = {(float)x, (float)y};
coord *= overDimensions;
coord -= center;
const float dist = length(scale * coord);
const float lumen = shade / (1.0 + exp((dist * inv_max_dist - range) * slope)) + (1.0 - shade);
float4 fout;
fout.rgb = fin.rgb * lumen;
fout.w = fin.w;
*out = rsPackColorTo8888(fout);
*out = convert_uchar4(fout);
}