blend use vector to optimize

modules/ocl/src/blend.cpp

@@ -77,8 +77,8 @@ void cv::ocl::blendLinear(const oclMat &img1, const oclMat &img2, const oclMat &
     int cols = img1.cols;
     int istep = img1.step1();
     int wstep = weights1.step1();
-    size_t globalSize[] = {cols * channels, rows, 1};
-    size_t localSize[] = {16, 16, 1};
+    size_t globalSize[] = {cols * channels / 4, rows, 1};
+    size_t localSize[] = {256, 1, 1};
 
     vector< pair<size_t, const void *> > args;
 

modules/ocl/src/kernels/blend_linear.cl

@@ -15,7 +15,7 @@
 // Third party copyrights are property of their respective owners.
 //
 // @Authors
-//    Liu Liujun, liujun@multicorewareinc.com
+//    Liu Liujun, liujun@multicorewareinc.com 
 //
 // Redistribution and use in source and binary forms, with or without modification,
 // are permitted provided that the following conditions are met:
@@ -43,11 +43,11 @@
 //
 //M*/
 __kernel void BlendLinear_C1_D0(
-    __global uchar *dst,
-    __global uchar *img1,
-    __global uchar *img2,
-    __global float *weight1,
-    __global float *weight2,
+    __global uchar4 *dst,
+    __global uchar4 *img1,
+    __global uchar4 *img2,
+    __global float4 *weight1,
+    __global float4 *weight2,
     int rows,
     int cols,
     int istep,
@@ -56,21 +56,20 @@ __kernel void BlendLinear_C1_D0(
 {
     int idx = get_global_id(0);
     int idy = get_global_id(1);
-    if (idx < cols && idy < rows)
+    if (idx << 2 < cols && idy < rows)
     {
-        int pos = mad24(idy,istep,idx);
-        int wpos = mad24(idy,wstep,idx);
-        float w1 = weight1[wpos];
-        float w2 = weight2[wpos];
-        dst[pos] = (img1[pos] * w1 + img2[pos] * w2) / (w1 + w2 + 1e-5f);
-
+        int pos = mad24(idy,istep >> 2,idx);
+        int wpos = mad24(idy,wstep >> 2,idx);
+        float4 w1 = weight1[wpos], w2 = weight2[wpos];
+        dst[pos] = convert_uchar4((convert_float4(img1[pos]) * w1 + 
+            convert_float4(img2[pos]) * w2) / (w1 + w2 + 1e-5f));
     }
 }
 
 __kernel void BlendLinear_C4_D0(
-    __global uchar *dst,
-    __global uchar *img1,
-    __global uchar *img2,
+    __global uchar4 *dst,
+    __global uchar4 *img1,
+    __global uchar4 *img2,
     __global float *weight1,
     __global float *weight2,
     int rows,
@@ -81,24 +80,24 @@ __kernel void BlendLinear_C4_D0(
 {
     int idx = get_global_id(0);
     int idy = get_global_id(1);
-    int x = idx / 4;
-    int y = idy;
-    if (x < cols && y < rows)
+    if (idx < cols && idy < rows)
     {
-        int pos = mad24(idy,istep,idx);
-        int wpos = mad24(idy,wstep,x);
+        int pos = mad24(idy,istep >> 2,idx);
+        int wpos = mad24(idy,wstep, idx);
         float w1 = weight1[wpos];
         float w2 = weight2[wpos];
-        dst[pos] = (img1[pos] * w1 + img2[pos] * w2) / (w1 + w2 + 1e-5f);
+        dst[pos] = convert_uchar4((convert_float4(img1[pos]) * w1 + 
+            convert_float4(img2[pos]) * w2) / (w1 + w2 + 1e-5f));
     }
 }
 
+
 __kernel void BlendLinear_C1_D5(
-    __global float *dst,
-    __global float *img1,
-    __global float *img2,
-    __global float *weight1,
-    __global float *weight2,
+    __global float4 *dst,
+    __global float4 *img1,
+    __global float4 *img2,
+    __global float4 *weight1,
+    __global float4 *weight2,
     int rows,
     int cols,
     int istep,
@@ -107,20 +106,19 @@ __kernel void BlendLinear_C1_D5(
 {
     int idx = get_global_id(0);
     int idy = get_global_id(1);
-    if (idx < cols && idy < rows)
+    if (idx << 2 < cols && idy < rows)
     {
-        int pos = mad24(idy,istep,idx);
-        int wpos = mad24(idy,wstep,idx);
-        float w1 = weight1[wpos];
-        float w2 = weight2[wpos];
+        int pos = mad24(idy,istep >> 2,idx);
+        int wpos = mad24(idy,wstep >> 2,idx);
+        float4 w1 = weight1[wpos], w2 = weight2[wpos];
         dst[pos] = (img1[pos] * w1 + img2[pos] * w2) / (w1 + w2 + 1e-5f);
     }
 }
 
 __kernel void BlendLinear_C4_D5(
-    __global float *dst,
-    __global float *img1,
-    __global float *img2,
+    __global float4 *dst,
+    __global float4 *img1,
+    __global float4 *img2,
     __global float *weight1,
     __global float *weight2,
     int rows,
@@ -131,12 +129,10 @@ __kernel void BlendLinear_C4_D5(
 {
     int idx = get_global_id(0);
     int idy = get_global_id(1);
-    int x = idx / 4;
-    int y = idy;
-    if (x < cols && y < rows)
+    if (idx < cols && idy < rows)
     {
-        int pos = mad24(idy,istep,idx);
-        int wpos = mad24(idy,wstep,x);
+        int pos = mad24(idy,istep >> 2,idx);
+        int wpos = mad24(idy,wstep, idx);
         float w1 = weight1[wpos];
         float w2 = weight2[wpos];
         dst[pos] = (img1[pos] * w1 + img2[pos] * w2) / (w1 + w2 + 1e-5f);