| //======================================================================== |
| // Gamma correction test program |
| // Copyright (c) Camilla Löwy <elmindreda@glfw.org> |
| // |
| // This software is provided 'as-is', without any express or implied |
| // warranty. In no event will the authors be held liable for any damages |
| // arising from the use of this software. |
| // |
| // Permission is granted to anyone to use this software for any purpose, |
| // including commercial applications, and to alter it and redistribute it |
| // freely, subject to the following restrictions: |
| // |
| // 1. The origin of this software must not be misrepresented; you must not |
| // claim that you wrote the original software. If you use this software |
| // in a product, an acknowledgment in the product documentation would |
| // be appreciated but is not required. |
| // |
| // 2. Altered source versions must be plainly marked as such, and must not |
| // be misrepresented as being the original software. |
| // |
| // 3. This notice may not be removed or altered from any source |
| // distribution. |
| // |
| //======================================================================== |
| // |
| // This program is used to test the gamma correction functionality for |
| // both full screen and windowed mode windows |
| // |
| //======================================================================== |
| |
| #include <glad/glad.h> |
| #include <GLFW/glfw3.h> |
| |
| #define NK_IMPLEMENTATION |
| #define NK_INCLUDE_FIXED_TYPES |
| #define NK_INCLUDE_FONT_BAKING |
| #define NK_INCLUDE_DEFAULT_FONT |
| #define NK_INCLUDE_DEFAULT_ALLOCATOR |
| #define NK_INCLUDE_VERTEX_BUFFER_OUTPUT |
| #define NK_INCLUDE_STANDARD_VARARGS |
| #define NK_BUTTON_TRIGGER_ON_RELEASE |
| #include <nuklear.h> |
| |
| #define NK_GLFW_GL2_IMPLEMENTATION |
| #include <nuklear_glfw_gl2.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| static void error_callback(int error, const char* description) |
| { |
| fprintf(stderr, "Error: %s\n", description); |
| } |
| |
| static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) |
| { |
| if (action == GLFW_PRESS && key == GLFW_KEY_ESCAPE) |
| glfwSetWindowShouldClose(window, GLFW_TRUE); |
| } |
| |
| static void chart_ramp_array(struct nk_context* nk, |
| struct nk_color color, |
| int count, unsigned short int* values) |
| { |
| if (nk_chart_begin_colored(nk, NK_CHART_LINES, |
| color, nk_rgb(255, 255, 255), |
| count, 0, 65535)) |
| { |
| int i; |
| for (i = 0; i < count; i++) |
| { |
| char buffer[1024]; |
| if (nk_chart_push(nk, values[i])) |
| { |
| snprintf(buffer, sizeof(buffer), "#%u: %u (%0.5f) ", |
| i, values[i], values[i] / 65535.f); |
| nk_tooltip(nk, buffer); |
| } |
| } |
| |
| nk_chart_end(nk); |
| } |
| } |
| |
| 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(); |
| |
| glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE); |
| |
| 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); |
| } |
| |