Initial revision

1 files changed, 474 insertions, 0 deletions

diff --git a/progs/samples/texture.c b/progs/samples/texture.c
new file mode 100644
index 0000000000..7ee41eef28
--- /dev/null
+++ b/progs/samples/texture.c
@@ -0,0 +1,474 @@
+/*
+ * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the name of
+ * Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
+ * ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+
+#include "loadppm.c"
+
+GLenum doubleBuffer;
+
+char *texFileName = 0;
+PPMImage *image;
+
+float *minFilter, *magFilter, *sWrapMode, *tWrapMode;
+float decal[] = {GL_DECAL};
+float modulate[] = {GL_MODULATE};
+float repeat[] = {GL_REPEAT};
+float clamp[] = {GL_CLAMP};
+float nr[] = {GL_NEAREST};
+float ln[] = {GL_LINEAR};
+float nr_mipmap_nr[] = {GL_NEAREST_MIPMAP_NEAREST};
+float nr_mipmap_ln[] = {GL_NEAREST_MIPMAP_LINEAR};
+float ln_mipmap_nr[] = {GL_LINEAR_MIPMAP_NEAREST};
+float ln_mipmap_ln[] = {GL_LINEAR_MIPMAP_LINEAR};
+GLint sphereMap[] = {GL_SPHERE_MAP};
+
+GLenum doSphere = GL_FALSE;
+float xRotation = 0.0, yRotation = 0.0, zTranslate = -3.125;
+
+GLint cube;
+float c[6][4][3] = {
+    {
+	{
+	    1.0, 1.0, -1.0
+	},
+	{
+	    -1.0, 1.0, -1.0
+	},
+	{
+	    -1.0, -1.0, -1.0
+	},
+	{
+	    1.0, -1.0, -1.0
+	}
+    },
+    {
+	{
+	    1.0, 1.0, 1.0
+	},
+	{
+	    1.0, 1.0, -1.0
+	},
+	{
+	    1.0, -1.0, -1.0
+	},
+	{
+	    1.0, -1.0, 1.0
+	}
+    },
+    {
+	{
+	    -1.0, 1.0, 1.0
+	},
+	{
+	    1.0, 1.0, 1.0
+	},
+	{
+	    1.0, -1.0, 1.0
+	},
+	{
+	    -1.0, -1.0, 1.0
+	}
+    },
+    {
+	{
+	    -1.0, 1.0, -1.0
+	},
+	{
+	    -1.0, 1.0, 1.0
+	},
+	{
+	    -1.0, -1.0, 1.0
+	},
+	{
+	    -1.0, -1.0, -1.0
+	}
+    },
+    {
+	{
+	    -1.0, 1.0, 1.0
+	},
+	{
+	    -1.0, 1.0, -1.0
+	},
+	{
+	    1.0, 1.0, -1.0
+	},
+	{
+	    1.0, 1.0, 1.0
+	}
+    },
+    {
+	{
+	    -1.0, -1.0, -1.0
+	},
+	{
+	    -1.0, -1.0, 1.0
+	},
+	{
+	    1.0, -1.0, 1.0
+	},
+	{
+	    1.0, -1.0, -1.0
+	}
+    }
+};
+static float n[6][3] = {
+    {
+	0.0, 0.0, -1.0
+    },
+    {
+	1.0, 0.0, 0.0
+    },
+    {
+	0.0, 0.0, 1.0
+    },
+    {
+	-1.0, 0.0, 0.0
+    },
+    {
+	0.0, 1.0, 0.0
+    },
+    {
+	0.0, -1.0, 0.0
+    }
+};
+static float t[6][4][2] = {
+    {
+	{
+	    1.1,  1.1
+	},
+	{
+	    -0.1, 1.1
+	},
+	{
+	    -0.1, -0.1
+	},
+	{
+	    1.1,  -0.1
+	}
+    },
+    {
+	{
+	    1.1,  1.1
+	},
+	{
+	    -0.1, 1.1
+	},
+	{
+	    -0.1, -0.1
+	},
+	{
+	    1.1,  -0.1
+	}
+    },
+    {
+	{
+	    -0.1,  1.1
+	},
+	{
+	    1.1, 1.1
+	},
+	{
+	    1.1, -0.1
+	},
+	{
+	    -0.1,  -0.1
+	}
+    },
+    {
+	{
+	    1.1,  1.1
+	},
+	{
+	    -0.1, 1.1
+	},
+	{
+	    -0.1, -0.1
+	},
+	{
+	    1.1,  -0.1
+	}
+    },
+    {
+	{
+	    1.1,  1.1
+	},
+	{
+	    -0.1, 1.1
+	},
+	{
+	    -0.1, -0.1
+	},
+	{
+	    1.1,  -0.1
+	}
+    },
+    {
+	{
+	    1.1,  1.1
+	},
+	{
+	    -0.1, 1.1
+	},
+	{
+	    -0.1, -0.1
+	},
+	{
+	    1.1,  -0.1
+	}
+    },
+};
+
+static void BuildCube(void)
+{
+    GLint i;
+
+    glNewList(cube, GL_COMPILE);
+    for (i = 0; i < 6; i++) {
+	glBegin(GL_POLYGON);
+	    glNormal3fv(n[i]); glTexCoord2fv(t[i][0]); glVertex3fv(c[i][0]);
+	    glNormal3fv(n[i]); glTexCoord2fv(t[i][1]); glVertex3fv(c[i][1]);
+	    glNormal3fv(n[i]); glTexCoord2fv(t[i][2]); glVertex3fv(c[i][2]);
+	    glNormal3fv(n[i]); glTexCoord2fv(t[i][3]); glVertex3fv(c[i][3]);
+	glEnd();
+    }
+    glEndList();
+}
+
+static void BuildLists(void)
+{
+
+    cube = glGenLists(1);
+    BuildCube();
+}
+
+static void Init(void)
+{
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image->sizeX, image->sizeY,
+		      GL_RGB, GL_UNSIGNED_BYTE, image->data);
+    glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
+    glEnable(GL_TEXTURE_2D);
+
+    glFrontFace(GL_CCW);
+    glCullFace(GL_FRONT);
+    glEnable(GL_CULL_FACE);
+
+    BuildLists();
+
+    glClearColor(0.0, 0.0, 0.0, 0.0);
+
+    magFilter = nr;
+    minFilter = nr;
+    sWrapMode = repeat;
+    tWrapMode = repeat;
+}
+
+static void Reshape(int width, int height)
+{
+
+    glViewport(0, 0, (GLint)width, (GLint)height);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluPerspective(145.0, 1.0, 0.01, 1000);
+    glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key2(int key, int x, int y)
+{
+
+    switch (key) {
+      case GLUT_KEY_LEFT:
+	yRotation -= 0.5;
+	break;
+      case GLUT_KEY_RIGHT:
+	yRotation += 0.5;
+	break;
+      case GLUT_KEY_UP:
+	xRotation -= 0.5;
+	break;
+      case GLUT_KEY_DOWN:
+	xRotation += 0.5;
+	break;
+      default:
+	return;
+    }
+
+    glutPostRedisplay();
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+    switch (key) {
+      case 27:
+	exit(1);
+
+      case 'T':
+	zTranslate += 0.25;
+	break;
+      case 't':
+	zTranslate -= 0.25;
+	break;
+
+      case 's':
+	doSphere = !doSphere;
+	if (doSphere) {
+	    glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap);
+	    glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap);
+	    glEnable(GL_TEXTURE_GEN_S);
+	    glEnable(GL_TEXTURE_GEN_T);
+	} else {
+	    glDisable(GL_TEXTURE_GEN_S);
+	    glDisable(GL_TEXTURE_GEN_T);
+	}
+	break;
+
+      case '0':
+	magFilter = nr;
+	break;
+      case '1':
+	magFilter = ln;
+	break;
+      case '2':
+	minFilter = nr;
+	break;
+      case '3':
+	minFilter = ln;
+	break;
+      case '4':
+	minFilter = nr_mipmap_nr;
+	break;
+      case '5':
+	minFilter = nr_mipmap_ln;
+	break;
+      case '6':
+	minFilter = ln_mipmap_nr;
+	break;
+      case '7':
+	minFilter = ln_mipmap_ln;
+	break;
+      default:
+	return;
+    }
+
+    glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sWrapMode);
+    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tWrapMode);
+    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
+    glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
+
+    glPushMatrix();
+
+    glTranslatef(0.0, 0.0, zTranslate);
+    glRotatef(xRotation, 1, 0, 0);
+    glRotatef(yRotation, 0, 1, 0);
+    glCallList(cube);
+
+    glPopMatrix();
+
+    glFlush();
+
+    if (doubleBuffer) {
+	glutSwapBuffers();
+    }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+    GLint i;
+
+    doubleBuffer = GL_FALSE;
+
+    for (i = 1; i < argc; i++) {
+	if (strcmp(argv[i], "-sb") == 0) {
+	    doubleBuffer = GL_FALSE;
+	} else if (strcmp(argv[i], "-db") == 0) {
+	    doubleBuffer = GL_TRUE;
+	} else if (strcmp(argv[i], "-f") == 0) {
+	    if (i+1 >= argc || argv[i+1][0] == '-') {
+		printf("-f (No file name).\n");
+		return GL_FALSE;
+	    } else {
+		texFileName = argv[++i];
+	    }
+	} else {
+	    printf("%s (Bad option).\n", argv[i]);
+	    return GL_FALSE;
+	}
+    }
+    return GL_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+    GLenum type;
+
+    glutInit(&argc, argv);
+
+    if (Args(argc, argv) == GL_FALSE) {
+	exit(1);
+    }
+
+    if (texFileName == 0) {
+	printf("No image file.\n");
+	exit(1);
+    }
+
+    image = LoadPPM(texFileName);
+
+    glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300);
+
+    type = GLUT_RGB;
+    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+    glutInitDisplayMode(type);
+
+    if (glutCreateWindow("Texture Test") == GL_FALSE) {
+	exit(1);
+    }
+
+    Init();
+
+    glutReshapeFunc(Reshape);
+    glutKeyboardFunc(Key);
+    glutSpecialFunc(Key2);
+    glutDisplayFunc(Draw);
+    glutMainLoop();
+	return 0;
+}