vars to test 1D/2D textures with linear/nearest filtering

diff --git a/progs/trivial/quad-tex-2d.c b/progs/trivial/quad-tex-2d.c
index 98f538eda32345856779548c29f457ac29ed81cb..cb0b9202a25f999ac8122f66ac7091a39abd82e8 100644 (file)
--- a/progs/trivial/quad-tex-2d.c
+++ b/progs/trivial/quad-tex-2d.c
@@ -27,10 +27,8 @@
 #include <stdlib.h>
 #include <GL/glut.h>
 
-
-#define CI_OFFSET_1 16
-#define CI_OFFSET_2 32
-
+static GLenum Target = GL_TEXTURE_2D;
+static GLenum Filter = GL_NEAREST;
 GLenum doubleBuffer;
 
 static void Init(void)
@@ -60,42 +58,42 @@ static void Init(void)
         }
       }
 
+      glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+
+      if (Target == GL_TEXTURE_1D)
+         glTexImage1D(Target, 0, 3, SIZE, 0, GL_RGB, GL_UNSIGNED_BYTE, tex2d);
+      else
+         glTexImage2D(Target, 0, 3, SIZE, SIZE, 0,
+                      GL_RGB, GL_UNSIGNED_BYTE, tex2d);
+
+      glEnable(Target);
       glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
-      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
-      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+      glTexParameterf(Target, GL_TEXTURE_WRAP_R, GL_REPEAT);
+      glTexParameterf(Target, GL_TEXTURE_MIN_FILTER, Filter);
+      glTexParameterf(Target, GL_TEXTURE_MAG_FILTER, Filter);
 
-      glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-      glTexImage2D(GL_TEXTURE_2D, 0, 3, SIZE, SIZE, 0,
-                  GL_RGB, GL_UNSIGNED_BYTE, tex2d);
       glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
-      glEnable(GL_TEXTURE_2D);
    }
-
 }
 
 static void Reshape(int width, int height)
 {
-
-    glViewport(0, 0, (GLint)width, (GLint)height);
-
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-    glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
-    glMatrixMode(GL_MODELVIEW);
+   glViewport(0, 0, (GLint)width, (GLint)height);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+   glMatrixMode(GL_MODELVIEW);
 }
 
 static void Key(unsigned char key, int x, int y)
 {
-
-    switch (key) {
-      case 27:
-       exit(1);
-      default:
-       return;
-    }
-
-    glutPostRedisplay();
+   switch (key) {
+   case 27:
+      exit(0);
+   default:
+      return;
+   }
+   glutPostRedisplay();
 }
 
 static void Draw(void)
@@ -165,5 +163,5 @@ int main(int argc, char **argv)
     glutKeyboardFunc(Key);
     glutDisplayFunc(Draw);
     glutMainLoop();
-       return 0;
+    return 0;
 }