int main(int argc, char** argv)
{
GLFWwindow* window;
struct nk_context* nk;
struct nk_font_atlas* atlas;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
window = glfwCreateWindow(400, 400, "Opacity", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
glfwMakeContextCurrent(window);
gladLoadGL(glfwGetProcAddress);
glfwSwapInterval(1);
nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
nk_glfw3_font_stash_begin(&atlas);
nk_glfw3_font_stash_end();
while (!glfwWindowShouldClose(window))
{
int width, height;
struct nk_rect area;
glfwGetWindowSize(window, &width, &height);
area = nk_rect(0.f, 0.f, (float) width, (float) height);
glClear(GL_COLOR_BUFFER_BIT);
nk_glfw3_new_frame();
if (nk_begin(nk, "", area, 0))
{
float opacity = glfwGetWindowOpacity(window);
nk_layout_row_dynamic(nk, 30, 2);
if (nk_slider_float(nk, 0.f, &opacity, 1.f, 0.001f))
glfwSetWindowOpacity(window, opacity);
nk_labelf(nk, NK_TEXT_LEFT, "%0.3f", opacity);
}
nk_end(nk);
nk_glfw3_render(NK_ANTI_ALIASING_ON);
glfwSwapBuffers(window);
glfwWaitEventsTimeout(1.0);
}
nk_glfw3_shutdown();
glfwTerminate();
exit(EXIT_SUCCESS);
}
int main(int argc, char** argv)
{
GLFWmonitor* monitor = NULL;
GLFWwindow* window;
GLFWgammaramp orig_ramp;
struct nk_context* nk;
struct nk_font_atlas* atlas;
float gamma_value = 1.f;
glfwSetErrorCallback(error_callback);
if (!glfwInit())
exit(EXIT_FAILURE);
monitor = glfwGetPrimaryMonitor();
window = glfwCreateWindow(800, 400, "Gamma Test", NULL, NULL);
if (!window)
{
glfwTerminate();
exit(EXIT_FAILURE);
}
{
const GLFWgammaramp* ramp = glfwGetGammaRamp(monitor);
const size_t array_size = ramp->size * sizeof(short);
orig_ramp.size = ramp->size;
orig_ramp.red = malloc(array_size);
orig_ramp.green = malloc(array_size);
orig_ramp.blue = malloc(array_size);
memcpy(orig_ramp.red, ramp->red, array_size);
memcpy(orig_ramp.green, ramp->green, array_size);
memcpy(orig_ramp.blue, ramp->blue, array_size);
}
glfwMakeContextCurrent(window);
gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
glfwSwapInterval(1);
nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
nk_glfw3_font_stash_begin(&atlas);
nk_glfw3_font_stash_end();
glfwSetKeyCallback(window, key_callback);
while (!glfwWindowShouldClose(window))
{
int width, height;
struct nk_rect area;
glfwGetWindowSize(window, &width, &height);
area = nk_rect(0.f, 0.f, (float) width, (float) height);
nk_window_set_bounds(nk, "", area);
glClear(GL_COLOR_BUFFER_BIT);
nk_glfw3_new_frame();
if (nk_begin(nk, "", area, 0))
{
const GLFWgammaramp* ramp;
nk_layout_row_dynamic(nk, 30, 3);
if (nk_slider_float(nk, 0.1f, &gamma_value, 5.f, 0.1f))
glfwSetGamma(monitor, gamma_value);
nk_labelf(nk, NK_TEXT_LEFT, "%0.1f", gamma_value);
if (nk_button_label(nk, "Revert"))
glfwSetGammaRamp(monitor, &orig_ramp);
ramp = glfwGetGammaRamp(monitor);
nk_layout_row_dynamic(nk, height - 60.f, 3);
chart_ramp_array(nk, nk_rgb(255, 0, 0), ramp->size, ramp->red);
chart_ramp_array(nk, nk_rgb(0, 255, 0), ramp->size, ramp->green);
chart_ramp_array(nk, nk_rgb(0, 0, 255), ramp->size, ramp->blue);
}
nk_end(nk);
nk_glfw3_render(NK_ANTI_ALIASING_ON);
glfwSwapBuffers(window);
glfwWaitEventsTimeout(1.0);
}
free(orig_ramp.red);
free(orig_ramp.green);
free(orig_ramp.blue);
nk_glfw3_shutdown();
glfwTerminate();
exit(EXIT_SUCCESS);
}