From da9e6dac247470134275de0f573436c85dc821bf Mon Sep 17 00:00:00 2001
From: ws909 <37029098+ws909@users.noreply.github.com>
Date: Wed, 25 Jan 2023 19:53:15 +0100
Subject: [PATCH] Add theming test program source

---
 tests/theming.c | 164 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 tests/theming.c

diff --git a/tests/theming.c b/tests/theming.c
new file mode 100644
index 00000000..695876ff
--- /dev/null
+++ b/tests/theming.c
@@ -0,0 +1,164 @@
+//========================================================================
+// Theming 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 theming features.
+//
+//========================================================================
+
+#define GLAD_GL_IMPLEMENTATION
+#include <glad/gl.h>
+#define GLFW_INCLUDE_NONE
+#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+const unsigned char theme_colors[6][4] =
+{
+    {   0,   0,   0, 255 }, // black
+    { 255,   0,   0, 255 }, // red
+    {   0, 255,   0, 255 }, // green
+    {   0,   0, 255, 255 }, // blue
+    { 255, 255, 255, 255 }, // white
+    { 128, 128, 128, 255 }  // gray (no theme color)
+};
+
+static int cur_theme_color = 0;
+
+static GLFWtheme theme;
+
+static void set_theme(GLFWwindow* window, int theme_color)
+{
+    memcpy(theme.color, theme_colors[theme_color], 4);
+    
+    if (theme_color == 6)
+    {
+        theme.flags &= ~GLFW_THEME_FLAG_HAS_COLOR;
+    } else
+    {
+        theme.flags |= GLFW_THEME_FLAG_HAS_COLOR;
+    }
+
+    const char* title;
+    
+    switch (theme.baseTheme) {
+        case GLFW_BASE_THEME_DEFAULT:
+            title = "Default theme";
+            break;
+        case GLFW_BASE_THEME_LIGHT:
+            title = "Light theme";
+            break;
+        case GLFW_BASE_THEME_DARK:
+            title = "Dark theme";
+            break;
+    }
+    
+    glfwSetWindowTitle(window, title);
+    glfwSetTheme(window, &theme);
+}
+
+static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
+{
+    if (action != GLFW_PRESS)
+        return;
+
+    switch (key)
+    {
+        case GLFW_KEY_0:
+            glfwSetWindowTitle(window, "Default theme (NULL)");
+            glfwSetTheme(window, NULL);
+            break;
+        case GLFW_KEY_1:
+            theme.baseTheme = GLFW_BASE_THEME_DEFAULT;
+            set_theme(window, cur_theme_color);
+            break;
+        case GLFW_KEY_2:
+            theme.baseTheme = GLFW_BASE_THEME_LIGHT;
+            set_theme(window, cur_theme_color);
+            break;
+        case GLFW_KEY_3:
+            theme.baseTheme = GLFW_BASE_THEME_DARK;
+            set_theme(window, cur_theme_color);
+            break;
+        case GLFW_KEY_ESCAPE:
+            glfwSetWindowShouldClose(window, GLFW_TRUE);
+            break;
+        case GLFW_KEY_SPACE:
+            cur_theme_color = (cur_theme_color + 1) % 6;
+            set_theme(window, cur_theme_color);
+            break;
+    }
+}
+
+int main(int argc, char** argv)
+{
+    GLFWwindow* window;
+
+    if (!glfwInit())
+    {
+        fprintf(stderr, "Failed to initialize GLFW\n");
+        exit(EXIT_FAILURE);
+    }
+
+    window = glfwCreateWindow(200, 200, "Window Icon", NULL, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+
+        fprintf(stderr, "Failed to open GLFW window\n");
+        exit(EXIT_FAILURE);
+    }
+
+    glfwMakeContextCurrent(window);
+    gladLoadGL(glfwGetProcAddress);
+
+    glfwSetKeyCallback(window, key_callback);
+    
+    theme.baseTheme = GLFW_BASE_THEME_DEFAULT;
+    theme.flags = 0;
+    theme.color[0] = 0;
+    theme.color[1] = 0;
+    theme.color[2] = 0;
+    theme.color[3] = 0;
+    set_theme(window, cur_theme_color);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        glClearColor(
+                theme_colors[cur_theme_color][0] / 255.0f,
+                theme_colors[cur_theme_color][1] / 255.0f,
+                theme_colors[cur_theme_color][2] / 255.0f,
+                theme_colors[cur_theme_color][3] / 255.0f
+        );
+        glClear(GL_COLOR_BUFFER_BIT);
+        glfwSwapBuffers(window);
+        glfwWaitEvents();
+    }
+
+    glfwDestroyWindow(window);
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}