minor fixes

modules/java/CMakeLists.txt

@@ -179,19 +179,18 @@ if(NOT ANDROID)
 else()
   file(GLOB_RECURSE handwrittren_lib_project_files_rel RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}/android_lib/" "${CMAKE_CURRENT_SOURCE_DIR}/android_lib/*")
   list(REMOVE_ITEM handwrittren_lib_project_files_rel "${ANDROID_MANIFEST_FILE}")
-endif()
-
-#  Calc default SDK Target
-android_get_compatible_target(android_sdk_target ${ANDROID_NATIVE_API_LEVEL} ${ANDROID_SDK_TARGET} 11)
-string(REGEX REPLACE "android-" "" android_sdk_target_num ${android_sdk_target})
 
-if( (ANDROID_SDK_TARGET AND ANDROID_SDK_TARGET LESS 21) OR (android_sdk_target_num LESS 21) )
-  message(STATUS "[OpenCV for Android SDK]: A new OpenGL Camera Bridge (CameraGLSurfaceView, CameraGLRendererBase, CameraRenderer, Camera2Renderer) is disabled, because ANDROID_SDK_TARGET (${android_sdk_target_num}) < 21")
-  ocv_list_filterout(handwritten_java_sources "android\\\\+CameraGL")
-  ocv_list_filterout(handwritten_java_sources "android\\\\+Camera.?Renderer")
+  #  calc default SDK Target
+  android_get_compatible_target(android_sdk_target ${ANDROID_NATIVE_API_LEVEL} ${ANDROID_SDK_TARGET} 11)
+  string(REGEX REPLACE "android-" "" android_sdk_target_num ${android_sdk_target})
+  # filter out
+  if( (ANDROID_SDK_TARGET AND ANDROID_SDK_TARGET LESS 21) OR (android_sdk_target_num LESS 21) )
+    message(STATUS "[OpenCV for Android SDK]: A new OpenGL Camera Bridge (CameraGLSurfaceView, CameraGLRendererBase, CameraRenderer, Camera2Renderer) is disabled, because ANDROID_SDK_TARGET (${android_sdk_target_num}) < 21")
+    ocv_list_filterout(handwritten_java_sources "android\\\\+CameraGL")
+    ocv_list_filterout(handwritten_java_sources "android\\\\+Camera.?Renderer")
+  endif()
 endif()
 
-
 # IMPORTANT: add dependencies to cmake (we should rerun cmake if any of these files is modified)
 add_cmake_dependencies(${scripts_gen_java} ${scripts_hdr_parser} ${opencv_public_headers})
 

modules/java/generator/src/java/android+CameraGLRendererBase.java

@@ -219,9 +219,9 @@ public abstract class CameraGLRendererBase implements GLSurfaceView.Renderer, Su
         int vshader = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
         GLES20.glShaderSource(vshader, vss);
         GLES20.glCompileShader(vshader);
-        int[] compiled = new int[1];
-        GLES20.glGetShaderiv(vshader, GLES20.GL_COMPILE_STATUS, compiled, 0);
-        if (compiled[0] == 0) {
+        int[] status = new int[1];
+        GLES20.glGetShaderiv(vshader, GLES20.GL_COMPILE_STATUS, status, 0);
+        if (status[0] == 0) {
             Log.e("CameraGLRendererBase", "Could not compile vertex shader: "+GLES20.glGetShaderInfoLog(vshader));
             GLES20.glDeleteShader(vshader);
             vshader = 0;
@@ -231,8 +231,8 @@ public abstract class CameraGLRendererBase implements GLSurfaceView.Renderer, Su
         int fshader = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
         GLES20.glShaderSource(fshader, fss);
         GLES20.glCompileShader(fshader);
-        GLES20.glGetShaderiv(fshader, GLES20.GL_COMPILE_STATUS, compiled, 0);
-        if (compiled[0] == 0) {
+        GLES20.glGetShaderiv(fshader, GLES20.GL_COMPILE_STATUS, status, 0);
+        if (status[0] == 0) {
             Log.e("CameraGLRendererBase", "Could not compile fragment shader:"+GLES20.glGetShaderInfoLog(fshader));
             GLES20.glDeleteShader(vshader);
             GLES20.glDeleteShader(fshader);
@@ -244,9 +244,25 @@ public abstract class CameraGLRendererBase implements GLSurfaceView.Renderer, Su
         GLES20.glAttachShader(program, vshader);
         GLES20.glAttachShader(program, fshader);
         GLES20.glLinkProgram(program);
-        Log.d("CameraGLRendererBase", "shaders were compiled OK");
         GLES20.glDeleteShader(vshader);
         GLES20.glDeleteShader(fshader);
+        GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, status, 0);
+        if (status[0] == 0) {
+            Log.e("CameraGLRendererBase", "Could not link shader program: "+GLES20.glGetProgramInfoLog(program));
+            program = 0;
+            return 0;
+        }
+        GLES20.glValidateProgram(program);
+        GLES20.glGetProgramiv(program, GLES20.GL_VALIDATE_STATUS, status, 0);
+        if (status[0] == 0)
+        {
+            Log.e("CameraGLRendererBase", "Shader program validation error: "+GLES20.glGetProgramInfoLog(program));
+            GLES20.glDeleteProgram(program);
+            program = 0;
+            return 0;
+        }
+
+        Log.d("CameraGLRendererBase", "Shader program is built OK");
 
         return program;
     }

samples/android/tutorial-4-opencl/jni/CLprocessor.cpp

@@ -237,23 +237,17 @@ void drawFrameProcCPU(int w, int h, int texOut)
     int64_t t;
 
     // let's modify pixels in FBO texture in C++ code (on CPU)
-    const int BUFF_SIZE = 1<<24;//2k*2k*4;
-    static char tmpBuff[BUFF_SIZE];
-    if(w*h > BUFF_SIZE)
-    {
-        LOGE("Internal temp buffer is too small, can't make CPU frame processing");
-        return;
-    }
+    static cv::Mat m;
+    m.create(h, w, CV_8UC4);
 
     // read
     t = getTimeMs();
     // expecting FBO to be bound
-    glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, tmpBuff);
+    glReadPixels(0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, m.data);
     LOGD("glReadPixels() costs %d ms", getTimeInterval(t));
 
    // modify
     t = getTimeMs();
-    cv::Mat m(h, w, CV_8UC4, tmpBuff);
     cv::Laplacian(m, m, CV_8U);
     m *= 10;
     LOGD("Laplacian() costs %d ms", getTimeInterval(t));
@@ -262,7 +256,7 @@ void drawFrameProcCPU(int w, int h, int texOut)
     glActiveTexture(GL_TEXTURE0);
     glBindTexture(GL_TEXTURE_2D, texOut);
     t = getTimeMs();
-    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, tmpBuff);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RGBA, GL_UNSIGNED_BYTE, m.data);
     LOGD("glTexSubImage2D() costs %d ms", getTimeInterval(t));
 }