108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
//========================================================================
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// Window opacity test program
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// Copyright (c) Camilla Löwy <elmindreda@glfw.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include <glad/gl.h>
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#define GLFW_INCLUDE_NONE
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#include <GLFW/glfw3.h>
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#define NK_IMPLEMENTATION
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#define NK_INCLUDE_FIXED_TYPES
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#define NK_INCLUDE_FONT_BAKING
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#define NK_INCLUDE_DEFAULT_FONT
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#define NK_INCLUDE_DEFAULT_ALLOCATOR
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#define NK_INCLUDE_VERTEX_BUFFER_OUTPUT
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#define NK_INCLUDE_STANDARD_VARARGS
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#include <nuklear.h>
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#define NK_GLFW_GL2_IMPLEMENTATION
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#include <nuklear_glfw_gl2.h>
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#include <stdio.h>
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#include <stdlib.h>
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static void error_callback(int error, const char* description)
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{
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fprintf(stderr, "Error: %s\n", description);
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}
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int main(int argc, char** argv)
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{
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GLFWwindow* window;
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struct nk_context* nk;
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struct nk_font_atlas* atlas;
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glfwSetErrorCallback(error_callback);
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if (!glfwInit())
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exit(EXIT_FAILURE);
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glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
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window = glfwCreateWindow(400, 400, "Opacity", NULL, NULL);
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if (!window)
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{
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glfwTerminate();
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exit(EXIT_FAILURE);
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}
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glfwMakeContextCurrent(window);
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gladLoadGL(glfwGetProcAddress);
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glfwSwapInterval(1);
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nk = nk_glfw3_init(window, NK_GLFW3_INSTALL_CALLBACKS);
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nk_glfw3_font_stash_begin(&atlas);
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nk_glfw3_font_stash_end();
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while (!glfwWindowShouldClose(window))
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{
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int width, height;
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struct nk_rect area;
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glfwGetWindowSize(window, &width, &height);
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area = nk_rect(0.f, 0.f, (float) width, (float) height);
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glClear(GL_COLOR_BUFFER_BIT);
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nk_glfw3_new_frame();
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if (nk_begin(nk, "", area, 0))
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{
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float opacity = glfwGetWindowOpacity(window);
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nk_layout_row_dynamic(nk, 30, 2);
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if (nk_slider_float(nk, 0.f, &opacity, 1.f, 0.001f))
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glfwSetWindowOpacity(window, opacity);
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nk_labelf(nk, NK_TEXT_LEFT, "%0.3f", opacity);
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}
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nk_end(nk);
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nk_glfw3_render(NK_ANTI_ALIASING_ON);
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glfwSwapBuffers(window);
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glfwWaitEventsTimeout(1.0);
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}
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nk_glfw3_shutdown();
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glfwTerminate();
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exit(EXIT_SUCCESS);
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}
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