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#include "../fixtures/util.hpp"
#include <mbgl/map/map.hpp>
#include <mbgl/platform/default/headless_display.hpp>
#include <mbgl/platform/default/headless_view.hpp>
#include <mbgl/storage/online_file_source.hpp>
#include <mbgl/layer/custom_layer.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/mat4.hpp>
using namespace mbgl;
static const GLchar * vertexShaderSource = "attribute vec2 a_pos; void main() { gl_Position = vec4(a_pos, 0, 1); }";
static const GLchar * fragmentShaderSource = "void main() { gl_FragColor = vec4(0, 1, 0, 1); }";
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 background[] = { -1,-1, 1,-1, -1,1, 1,1 };
MBGL_CHECK_ERROR(glGenBuffers(1, &buffer));
MBGL_CHECK_ERROR(glBindBuffer(GL_ARRAY_BUFFER, buffer));
MBGL_CHECK_ERROR(glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), background, 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, NULL));
MBGL_CHECK_ERROR(glDisable(GL_STENCIL_TEST));
MBGL_CHECK_ERROR(glDisable(GL_DEPTH_TEST));
MBGL_CHECK_ERROR(glDrawArrays(GL_TRIANGLE_STRIP, 0, 4));
}
GLuint program = 0;
GLuint vertexShader = 0;
GLuint fragmentShader = 0;
GLuint buffer = 0;
GLuint a_pos = 0;
};
TEST(CustomLayer, Basic) {
auto display = std::make_shared<mbgl::HeadlessDisplay>();
HeadlessView view(display, 1);
OnlineFileSource fileSource(nullptr, test::getFileSourceRoot());
Map map(view, fileSource, MapMode::Still);
map.setStyleJSON(util::read_file("test/fixtures/api/empty.json"), "");
map.addCustomLayer(
"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());
test::checkImage("test/fixtures/custom_layer/basic", test::render(map));
}
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