generic-library/opencv
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

RGBA <-> mRGBA

Browse Source
This commit is contained in:
Ilya Lavrenov
2013-11-27 23:42:10 +04:00
parent f771a0ba81
commit d2e1318341
3 changed files with 54 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
modules/imgproc/src/color.cpp
View File

@@ -3010,6 +3010,15 @@ static bool ocl_cvtColor( InputArray _src, OutputArray _dst, int code, int dcn )
depth, dcn, bidx, hrange, 6.f/hrange));
break;
}
case COLOR_RGBA2mRGBA: case COLOR_mRGBA2RGBA:
{
CV_Assert(scn == 4 && depth == CV_8U);
dcn = 4;
k.create(code == COLOR_RGBA2mRGBA ? "RGBA2mRGBA" : "mRGBA2RGBA", ocl::imgproc::cvtcolor_oclsrc,
format("-D depth=%d -D dcn=4 -D scn=4 -D bidx=3", depth));
break;
}
default:
;
}

43
modules/imgproc/src/opencl/cvtcolor.cl
View File

@@ -988,12 +988,55 @@ __kernel void HLS2RGB(__global const uchar* srcptr, int src_step, int src_offset
#endif
/////////////////////////// RGBA <-> mRGBA (alpha premultiplied) //////////////
#ifdef DEPTH_0
__kernel void RGBA2mRGBA(__global const uchar* src, int src_step, int src_offset,
__global uchar* dst, int dst_step, int dst_offset,
int rows, int cols)
{
int x = get_global_id(0);
int y = get_global_id(1);
if (y < rows && x < cols)
{
x <<= 2;
int src_idx = mad24(y, src_step, src_offset + x);
int dst_idx = mad24(y, dst_step, dst_offset + x);
uchar v0 = src[src_idx], v1 = src[src_idx + 1];
uchar v2 = src[src_idx + 2], v3 = src[src_idx + 3];
dst[dst_idx] = (v0 * v3 + HALF_MAX) / MAX_NUM;
dst[dst_idx + 1] = (v1 * v3 + HALF_MAX) / MAX_NUM;
dst[dst_idx + 2] = (v2 * v3 + HALF_MAX) / MAX_NUM;
dst[dst_idx + 3] = v3;
}
}
__kernel void mRGBA2RGBA(__global const uchar* src, int src_step, int src_offset,
__global uchar* dst, int dst_step, int dst_offset,
int rows, int cols)
{
int x = get_global_id(0);
int y = get_global_id(1);
if (y < rows && x < cols)
{
x <<= 2;
int src_idx = mad24(y, src_step, src_offset + x);
int dst_idx = mad24(y, dst_step, dst_offset + x);
uchar v0 = src[src_idx], v1 = src[src_idx + 1];
uchar v2 = src[src_idx + 2], v3 = src[src_idx + 3];
uchar v3_half = v3 / 2;
dst[dst_idx] = v3 == 0 ? 0 : (v0 * MAX_NUM + v3_half) / v3;
dst[dst_idx + 1] = v3 == 0 ? 0 : (v1 * MAX_NUM + v3_half) / v3;
dst[dst_idx + 2] = v3 == 0 ? 0 : (v2 * MAX_NUM + v3_half) / v3;
dst[dst_idx + 3] = v3;
}
}
#endif