diff options
| author | Alexia Death <alexiadeath@gmail.com> | 2014-12-06 23:37:46 +0200 |
|---|---|---|
| committer | Alexia Death <alexiadeath@gmail.com> | 2014-12-06 23:37:46 +0200 |
| commit | 12b0aa46ff9683d2f1c65258da763ceedc8993d3 (patch) | |
| tree | af1e75d3ebb48c970bf8506ca6418426b94042f0 /opencl | |
| parent | 7fea0eefc05bc284db1b192540bdd7050ea19641 (diff) | |
operations: add preserve luminocity option to mono-mixer op and disable broken CL code
Diffstat (limited to 'opencl')
| -rw-r--r-- | opencl/mono-mixer.cl | 16 | ||||
| -rw-r--r-- | opencl/mono-mixer.cl.h | 16 |
2 files changed, 28 insertions, 4 deletions
diff --git a/opencl/mono-mixer.cl b/opencl/mono-mixer.cl index 88b337b7..0a17cac2 100644 --- a/opencl/mono-mixer.cl +++ b/opencl/mono-mixer.cl @@ -2,10 +2,22 @@ __kernel void gegl_mono_mixer (__global const float4 *src_buf, __global float2 *dst_buf, float red, float green, - float blue) + float blue, + const int preserve_luminocity) { int gid = get_global_id(0); float4 in_v = src_buf[gid]; - dst_buf[gid].x = in_v.x * red + in_v.y * green + in_v.z * blue; + float norm_factor = 1.0f; + + if (preserve_luminocity) + { + float sum = red + green + blue; + if (sum == 0.0) + norm_factor = 1.0f; + else + norm_factor = fabs (1.0f / sum); + } + + dst_buf[gid].x = (in_v.x * red + in_v.y * green + in_v.z * blue) * norm_factor; dst_buf[gid].y = in_v.w; } diff --git a/opencl/mono-mixer.cl.h b/opencl/mono-mixer.cl.h index 7b2fbc83..7a655ac1 100644 --- a/opencl/mono-mixer.cl.h +++ b/opencl/mono-mixer.cl.h @@ -3,11 +3,23 @@ static const char* mono_mixer_cl_source = " __global float2 *dst_buf, \n" " float red, \n" " float green, \n" -" float blue) \n" +" float blue, \n" +" const int preserve_luminocity) \n" "{ \n" " int gid = get_global_id(0); \n" " float4 in_v = src_buf[gid]; \n" -" dst_buf[gid].x = in_v.x * red + in_v.y * green + in_v.z * blue; \n" +" float norm_factor = 1.0f; \n" +" \n" +" if (preserve_luminocity) \n" +" { \n" +" float sum = red + green + blue; \n" +" if (sum == 0.0) \n" +" norm_factor = 1.0f; \n" +" else \n" +" norm_factor = fabs (1.0f / sum); \n" +" } \n" +" \n" +" dst_buf[gid].x = (in_v.x * red + in_v.y * green + in_v.z * blue) * norm_factor;\n" " dst_buf[gid].y = in_v.w; \n" "} \n" ; |