Context createContextGL(bool antiAlias, bool stencilStrokes) {
int flags = (antiAlias ? NVG_ANTIALIAS : 0) |
(stencilStrokes ? NVG_STENCIL_STROKES : 0);
#if defined(NANOVG_GLES3)
return { nvgCreateGLES3(flags), nvgDeleteGLES3 };
#elif defined(NANOVG_GLES2)
return { nvgCreateGLES2(flags), nvgDeleteGLES2 };
#else
return { nvgCreateGL3(flags), nvgDeleteGL3 };
#endif
}
int main()
{
GLFWwindow* window;
struct DemoData data;
struct NVGcontext* vg = NULL;
struct PerfGraph fps;
double prevt = 0;
if (!glfwInit()) {
printf("Failed to init GLFW.");
return -1;
}
initGraph(&fps, GRAPH_RENDER_FPS, "Frame Time");
glfwSetErrorCallback(errorcb);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
window = glfwCreateWindow(1000, 600, "NanoVG", NULL, NULL);
// window = glfwCreateWindow(1000, 600, "NanoVG", glfwGetPrimaryMonitor(), NULL);
if (!window) {
glfwTerminate();
return -1;
}
glfwSetKeyCallback(window, key);
glfwMakeContextCurrent(window);
vg = nvgCreateGLES3(512, 512, NVG_ANTIALIAS);
if (vg == NULL) {
printf("Could not init nanovg.\n");
return -1;
}
if (loadDemoData(vg, &data) == -1)
return -1;
glfwSwapInterval(0);
glfwSetTime(0);
prevt = glfwGetTime();
while (!glfwWindowShouldClose(window))
{
double mx, my, t, dt;
int winWidth, winHeight;
int fbWidth, fbHeight;
float pxRatio;
t = glfwGetTime();
dt = t - prevt;
prevt = t;
updateGraph(&fps, dt);
glfwGetCursorPos(window, &mx, &my);
glfwGetWindowSize(window, &winWidth, &winHeight);
glfwGetFramebufferSize(window, &fbWidth, &fbHeight);
// Calculate pixel ration for hi-dpi devices.
pxRatio = (float)fbWidth / (float)winWidth;
// Update and render
glViewport(0, 0, fbWidth, fbHeight);
if (premult)
glClearColor(0,0,0,0);
else
glClearColor(0.3f, 0.3f, 0.32f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT|GL_STENCIL_BUFFER_BIT);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
nvgBeginFrame(vg, winWidth, winHeight, pxRatio, premult ? NVG_PREMULTIPLIED_ALPHA : NVG_STRAIGHT_ALPHA);
renderDemo(vg, mx,my, winWidth,winHeight, t, blowup, &data);
renderGraph(vg, 5,5, &fps);
nvgEndFrame(vg);
glEnable(GL_DEPTH_TEST);
if (screenshot) {
screenshot = 0;
saveScreenShot(fbWidth, fbHeight, premult, "dump.png");
}
glfwSwapBuffers(window);
glfwPollEvents();
}
freeDemoData(vg, &data);
nvgDeleteGLES3(vg);
glfwTerminate();
return 0;
}