134 lines
4.7 KiB
C++
134 lines
4.7 KiB
C++
#include <jni.h>
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#include <GLES2/gl2.h>
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#include <mbgl/util/logging.hpp>
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#include <mbgl/style/layers/custom_layer.hpp>
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static const GLchar * vertexShaderSource = "attribute vec2 a_pos; void main() { gl_Position = vec4(a_pos, 0, 1); }";
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static const GLchar * fragmentShaderSource = "uniform vec4 fill_color; void main() { gl_FragColor = fill_color; }";
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class ExampleCustomLayer {
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public:
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~ExampleCustomLayer() {
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mbgl::Log::Info(mbgl::Event::General, "~ExampleCustomLayer");
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if (program) {
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glDeleteBuffers(1, &buffer);
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glDetachShader(program, vertexShader);
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glDetachShader(program, fragmentShader);
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glDeleteShader(vertexShader);
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glDeleteShader(fragmentShader);
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glDeleteProgram(program);
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}
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}
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void initialize() {
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mbgl::Log::Info(mbgl::Event::General, "Initialize");
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program = glCreateProgram();
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vertexShader = glCreateShader(GL_VERTEX_SHADER);
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fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(vertexShader, 1, &vertexShaderSource, nullptr);
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glCompileShader(vertexShader);
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glAttachShader(program, vertexShader);
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glShaderSource(fragmentShader, 1, &fragmentShaderSource, nullptr);
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glCompileShader(fragmentShader);
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glAttachShader(program, fragmentShader);
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glLinkProgram(program);
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a_pos = glGetAttribLocation(program, "a_pos");
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fill_color = glGetUniformLocation(program, "fill_color");
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GLfloat background[] = { -1,-1, 1,-1, -1,1, 1,1 };
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glGenBuffers(1, &buffer);
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), background, GL_STATIC_DRAW);
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}
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void render() {
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mbgl::Log::Info(mbgl::Event::General, "Render");
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glUseProgram(program);
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glBindBuffer(GL_ARRAY_BUFFER, buffer);
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glEnableVertexAttribArray(a_pos);
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glVertexAttribPointer(a_pos, 2, GL_FLOAT, GL_FALSE, 0, NULL);
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glDisable(GL_STENCIL_TEST);
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glDisable(GL_DEPTH_TEST);
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glUniform4fv(fill_color, 1, color);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
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GLuint program = 0;
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GLuint vertexShader = 0;
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GLuint fragmentShader = 0;
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GLuint buffer = 0;
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GLuint a_pos = 0;
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GLuint fill_color = 0;
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static GLfloat color[];
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};
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GLfloat ExampleCustomLayer::color[] = { 0.0f, 1.0f, 0.0f, 1.0f };
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jlong JNICALL nativeCreateContext(JNIEnv*, jobject) {
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mbgl::Log::Info(mbgl::Event::General, "nativeCreateContext");
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return reinterpret_cast<jlong>(new ExampleCustomLayer());
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}
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void JNICALL nativeSetColor(JNIEnv*, jobject, jfloat red, jfloat green, jfloat blue, jfloat alpha) {
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mbgl::Log::Info(mbgl::Event::General, "nativeSetColor: %.2f, %.2f, %.2f, %.2f", red, green, blue, alpha);
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ExampleCustomLayer::color[0] = red;
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ExampleCustomLayer::color[1] = green;
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ExampleCustomLayer::color[2] = blue;
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ExampleCustomLayer::color[3] = alpha;
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}
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void nativeInitialize(void *context) {
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mbgl::Log::Info(mbgl::Event::General, "nativeInitialize");
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reinterpret_cast<ExampleCustomLayer*>(context)->initialize();
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}
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void nativeRender(void *context, const mbgl::style::CustomLayerRenderParameters& /*parameters*/) {
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mbgl::Log::Info(mbgl::Event::General, "nativeRender");
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reinterpret_cast<ExampleCustomLayer*>(context)->render();
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}
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void nativeDenitialize(void *context) {
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mbgl::Log::Info(mbgl::Event::General, "nativeDeinitialize");
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delete reinterpret_cast<ExampleCustomLayer*>(context);
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}
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extern "C" JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void *) {
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mbgl::Log::Info(mbgl::Event::General, "OnLoad");
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JNIEnv *env = nullptr;
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vm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION_1_6);
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jclass customLayerClass = env->FindClass("com/mapbox/mapboxsdk/testapp/model/customlayer/ExampleCustomLayer");
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JNINativeMethod methods[] = {
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{"createContext", "()J", reinterpret_cast<void *>(&nativeCreateContext)},
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{"setColor", "(FFFF)V", reinterpret_cast<void *>(&nativeSetColor)}
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};
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if (env->RegisterNatives(customLayerClass, methods, 2) < 0) {
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env->ExceptionDescribe();
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return JNI_ERR;
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}
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env->SetStaticLongField(customLayerClass,
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env->GetStaticFieldID(customLayerClass, "InitializeFunction", "J"),
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reinterpret_cast<jlong>(nativeInitialize));
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env->SetStaticLongField(customLayerClass,
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env->GetStaticFieldID(customLayerClass, "RenderFunction", "J"),
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reinterpret_cast<jlong>(nativeRender));
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env->SetStaticLongField(customLayerClass,
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env->GetStaticFieldID(customLayerClass, "DeinitializeFunction", "J"),
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reinterpret_cast<jlong>(nativeDenitialize));
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return JNI_VERSION_1_6;
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}
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extern "C" JNIEXPORT void JNICALL JNI_OnUnload(JavaVM *, void *) {
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}
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