[test] add .test.cpp suffix to test case files

1 files changed, 118 insertions, 0 deletions

diff --git a/test/api/custom_layer.test.cpp b/test/api/custom_layer.test.cpp
new file mode 100644
index 0000000000..2dded19256
--- /dev/null
+++ b/test/api/custom_layer.test.cpp
@@ -0,0 +1,118 @@
+#include <mbgl/test/util.hpp>
+
+#include <mbgl/gl/gl.hpp>
+#include <mbgl/map/map.hpp>
+#include <mbgl/platform/default/headless_display.hpp>
+#include <mbgl/platform/default/headless_view.hpp>
+#include <mbgl/storage/default_file_source.hpp>
+#include <mbgl/style/layers/custom_layer.hpp>
+#include <mbgl/style/layers/fill_layer.hpp>
+#include <mbgl/util/io.hpp>
+#include <mbgl/util/mat4.hpp>
+#include <mbgl/util/run_loop.hpp>
+
+using namespace mbgl;
+using namespace mbgl::style;
+
+// Note that custom layers need to draw geometry with a z value of 1 to take advantage of
+// depth-based fragment culling.
+static const GLchar* vertexShaderSource = R"MBGL_SHADER(
+attribute vec2 a_pos;
+void main() {
+    gl_Position = vec4(a_pos, 1, 1);
+}
+)MBGL_SHADER";
+
+static const GLchar* fragmentShaderSource = R"MBGL_SHADER(
+void main() {
+    gl_FragColor = vec4(0, 0.5, 0, 0.5);
+}
+)MBGL_SHADER";
+
+// Not using any mbgl-specific stuff (other than a basic error-checking macro) in the
+// layer implementation because it is intended to reflect how someone using custom layers
+// might actually write their own implementation.
+
+class TestLayer {
+public:
+    ~TestLayer() {
+        if (program) {
+            MBGL_CHECK_ERROR(glDeleteBuffers(1, &buffer));
+            MBGL_CHECK_ERROR(glDetachShader(program, vertexShader));
+            MBGL_CHECK_ERROR(glDetachShader(program, fragmentShader));
+            MBGL_CHECK_ERROR(glDeleteShader(vertexShader));
+            MBGL_CHECK_ERROR(glDeleteShader(fragmentShader));
+            MBGL_CHECK_ERROR(glDeleteProgram(program));
+        }
+    }
+
+    void initialize() {
+        program = MBGL_CHECK_ERROR(glCreateProgram());
+        vertexShader = MBGL_CHECK_ERROR(glCreateShader(GL_VERTEX_SHADER));
+        fragmentShader = MBGL_CHECK_ERROR(glCreateShader(GL_FRAGMENT_SHADER));
+
+        MBGL_CHECK_ERROR(glShaderSource(vertexShader, 1, &vertexShaderSource, nullptr));
+        MBGL_CHECK_ERROR(glCompileShader(vertexShader));
+        MBGL_CHECK_ERROR(glAttachShader(program, vertexShader));
+        MBGL_CHECK_ERROR(glShaderSource(fragmentShader, 1, &fragmentShaderSource, nullptr));
+        MBGL_CHECK_ERROR(glCompileShader(fragmentShader));
+        MBGL_CHECK_ERROR(glAttachShader(program, fragmentShader));
+        MBGL_CHECK_ERROR(glLinkProgram(program));
+        a_pos = glGetAttribLocation(program, "a_pos");
+
+        GLfloat triangle[] = { 0, 0.5, 0.5, -0.5, -0.5, -0.5 };
+        MBGL_CHECK_ERROR(glGenBuffers(1, &buffer));
+        MBGL_CHECK_ERROR(glBindBuffer(GL_ARRAY_BUFFER, buffer));
+        MBGL_CHECK_ERROR(glBufferData(GL_ARRAY_BUFFER, 6 * sizeof(GLfloat), triangle, GL_STATIC_DRAW));
+    }
+
+    void render() {
+        MBGL_CHECK_ERROR(glUseProgram(program));
+        MBGL_CHECK_ERROR(glBindBuffer(GL_ARRAY_BUFFER, buffer));
+        MBGL_CHECK_ERROR(glEnableVertexAttribArray(a_pos));
+        MBGL_CHECK_ERROR(glVertexAttribPointer(a_pos, 2, GL_FLOAT, GL_FALSE, 0, nullptr));
+        MBGL_CHECK_ERROR(glDrawArrays(GL_TRIANGLE_STRIP, 0, 3));
+    }
+
+    GLuint program = 0;
+    GLuint vertexShader = 0;
+    GLuint fragmentShader = 0;
+    GLuint buffer = 0;
+    GLuint a_pos = 0;
+};
+
+TEST(CustomLayer, Basic) {
+    util::RunLoop loop;
+
+    auto display = std::make_shared<mbgl::HeadlessDisplay>();
+    HeadlessView view(display, 1);
+
+#ifdef MBGL_ASSET_ZIP
+    // Regenerate with `cd test/fixtures/api/ && zip -r assets.zip assets/`
+    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets.zip");
+#else
+    DefaultFileSource fileSource(":memory:", "test/fixtures/api/assets");
+#endif
+
+    Map map(view, fileSource, MapMode::Still);
+    map.setStyleJSON(util::read_file("test/fixtures/api/water.json"));
+    map.setLatLngZoom({ 37.8, -122.5 }, 10);
+    map.addLayer(std::make_unique<CustomLayer>(
+        "custom",
+        [] (void* context) {
+            reinterpret_cast<TestLayer*>(context)->initialize();
+        },
+        [] (void* context, const CustomLayerRenderParameters&) {
+            reinterpret_cast<TestLayer*>(context)->render();
+        },
+        [] (void* context) {
+            delete reinterpret_cast<TestLayer*>(context);
+        }, new TestLayer()));
+
+    auto layer = std::make_unique<FillLayer>("landcover", "mapbox");
+    layer->setSourceLayer("landcover");
+    layer->setFillColor(Color{ 1.0, 1.0, 0.0, 1.0 });
+    map.addLayer(std::move(layer));
+
+    test::checkImage("test/fixtures/custom_layer/basic", test::render(map), 0.0006, 0.1);
+}