Initial import of 2.7 Lite.

2026-09-22 16:52:57 +00:00 · 2010-09-07 17:34:51 +02:00
parent efef33c791
commit 3249f812d6
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+//========================================================================
+// Fullscreen multisampling anti-aliasing test
+// Copyright (c) Camilla Berglund <elmindreda@elmindreda.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 test renders two high contrast, slowly rotating quads, one aliased
+// and one (hopefully) anti-aliased, thus allowing for visual verification
+// of whether FSAA is indeed enabled
+//
+//========================================================================
+
+#include <GL/glfw.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef GL_ARB_multisample
+#define GL_MULTISAMPLE_ARB 0x809D
+#endif
+
+static void GLFWCALL window_size_callback(int width, int height)
+{
+    glViewport(0, 0, width, height);
+}
+
+int main(void)
+{
+    if (!glfwInit())
+    {
+        fprintf(stderr, "Failed to initialize GLFW\n");
+        exit(EXIT_FAILURE);
+    }
+
+    glfwOpenWindowHint(GLFW_FSAA_SAMPLES, 4);
+
+    if (!glfwOpenWindow(400, 400, 0, 0, 0, 0, 0, 0, GLFW_WINDOW))
+    {
+        glfwTerminate();
+
+        fprintf(stderr, "Failed to open GLFW window\n");
+        exit(EXIT_FAILURE);
+    }
+
+    glfwSetWindowTitle("Aliasing Detector");
+    glfwSetWindowSizeCallback(window_size_callback);
+    glfwSwapInterval(1);
+
+    int samples = glfwGetWindowParam(GLFW_FSAA_SAMPLES);
+    if (samples)
+        printf("Context reports FSAA is supported with %i samples\n", samples);
+    else
+        printf("Context reports FSAA is unsupported\n");
+
+    glMatrixMode(GL_PROJECTION);
+    gluOrtho2D(0.f, 1.f, 0.f, 1.f);
+
+    while (glfwGetWindowParam(GLFW_OPENED))
+    {
+        GLfloat time = (GLfloat) glfwGetTime();
+
+        glClear(GL_COLOR_BUFFER_BIT);
+
+        glLoadIdentity();
+        glTranslatef(0.5f, 0.f, 0.f);
+        glRotatef(time, 0.f, 0.f, 1.f);
+
+        glEnable(GL_MULTISAMPLE_ARB);
+        glColor3f(1.f, 1.f, 1.f);
+        glRectf(-0.25f, -0.25f, 0.25f, 0.25f);
+
+        glLoadIdentity();
+        glTranslatef(-0.5f, 0.f, 0.f);
+        glRotatef(time, 0.f, 0.f, 1.f);
+
+        glDisable(GL_MULTISAMPLE_ARB);
+        glColor3f(1.f, 1.f, 1.f);
+        glRectf(-0.25f, -0.25f, 0.25f, 0.25f);
+
+        glfwSwapBuffers();
+    }
+
+    glfwTerminate();
+    exit(EXIT_SUCCESS);
+}
+