Initial Commit

1 files changed, 188 insertions, 0 deletions

diff --git a/glfw-3.2.1/tests/gamma.c b/glfw-3.2.1/tests/gamma.c
new file mode 100644
index 0000000..a80392f
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+++ b/glfw-3.2.1/tests/gamma.c
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+//========================================================================
+// Gamma correction test program
+// Copyright (c) Camilla Berglund <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>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "getopt.h"
+
+#define STEP_SIZE 0.1f
+
+static GLfloat gamma_value = 1.0f;
+
+static void usage(void)
+{
+    printf("Usage: gamma [-h] [-f]\n");
+    printf("Options:\n");
+    printf("  -f create full screen window\n");
+    printf("  -h show this help\n");
+}
+
+static void set_gamma(GLFWwindow* window, float value)
+{
+    GLFWmonitor* monitor = glfwGetWindowMonitor(window);
+    if (!monitor)
+        monitor = glfwGetPrimaryMonitor();
+
+    gamma_value = value;
+    printf("Gamma: %f\n", gamma_value);
+    glfwSetGamma(monitor, gamma_value);
+}
+
+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)
+        return;
+
+    switch (key)
+    {
+        case GLFW_KEY_ESCAPE:
+        {
+            glfwSetWindowShouldClose(window, GLFW_TRUE);
+            break;
+        }
+
+        case GLFW_KEY_KP_ADD:
+        case GLFW_KEY_UP:
+        case GLFW_KEY_Q:
+        {
+            set_gamma(window, gamma_value + STEP_SIZE);
+            break;
+        }
+
+        case GLFW_KEY_KP_SUBTRACT:
+        case GLFW_KEY_DOWN:
+        case GLFW_KEY_W:
+        {
+            if (gamma_value - STEP_SIZE > 0.f)
+                set_gamma(window, gamma_value - STEP_SIZE);
+
+            break;
+        }
+    }
+}
+
+static void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+    glViewport(0, 0, width, height);
+}
+
+int main(int argc, char** argv)
+{
+    int width, height, ch;
+    GLFWmonitor* monitor = NULL;
+    GLFWwindow* window;
+
+    glfwSetErrorCallback(error_callback);
+
+    if (!glfwInit())
+        exit(EXIT_FAILURE);
+
+    while ((ch = getopt(argc, argv, "fh")) != -1)
+    {
+        switch (ch)
+        {
+            case 'h':
+                usage();
+                exit(EXIT_SUCCESS);
+
+            case 'f':
+                monitor = glfwGetPrimaryMonitor();
+                break;
+
+            default:
+                usage();
+                exit(EXIT_FAILURE);
+        }
+    }
+
+    if (monitor)
+    {
+        const GLFWvidmode* mode = glfwGetVideoMode(monitor);
+
+        glfwWindowHint(GLFW_REFRESH_RATE, mode->refreshRate);
+        glfwWindowHint(GLFW_RED_BITS, mode->redBits);
+        glfwWindowHint(GLFW_GREEN_BITS, mode->greenBits);
+        glfwWindowHint(GLFW_BLUE_BITS, mode->blueBits);
+
+        width = mode->width;
+        height = mode->height;
+    }
+    else
+    {
+        width = 200;
+        height = 200;
+    }
+
+    window = glfwCreateWindow(width, height, "Gamma Test", monitor, NULL);
+    if (!window)
+    {
+        glfwTerminate();
+        exit(EXIT_FAILURE);
+    }
+
+    set_gamma(window, 1.f);
+
+    glfwMakeContextCurrent(window);
+    gladLoadGLLoader((GLADloadproc) glfwGetProcAddress);
+    glfwSwapInterval(1);
+
+    glfwSetKeyCallback(window, key_callback);
+    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+    glMatrixMode(GL_PROJECTION);
+    glOrtho(-1.f, 1.f, -1.f, 1.f, -1.f, 1.f);
+    glMatrixMode(GL_MODELVIEW);
+
+    glClearColor(0.5f, 0.5f, 0.5f, 0);
+
+    while (!glfwWindowShouldClose(window))
+    {
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glColor3f(0.8f, 0.2f, 0.4f);
+        glRectf(-0.5f, -0.5f, 0.5f, 0.5f);
+
+        glfwSwapBuffers(window);
+        glfwWaitEvents();
+    }
+
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}
+