Initial revision

[mesa.git] / progs / samples / copy.c

diff --git a/progs/samples/copy.c b/progs/samples/copy.c
new file mode 100644 (file)
index 0000000..391c637
--- /dev/null
+++ b/progs/samples/copy.c
@@ -0,0 +1,193 @@
+/*
+ * 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 <stdlib.h>
+#include <GL/glut.h>
+
+
+#include "loadppm.c"
+
+GLenum doubleBuffer;
+GLint windW, windH;
+
+char *fileName = 0;
+PPMImage *image;
+float point[3];
+float zoom;
+GLint x, y;
+
+static void Init(void)
+{
+
+    glClearColor(0.0, 0.0, 0.0, 0.0);
+
+    x = 0;
+    y = windH;
+    zoom = 1.8;
+}
+
+static void Reshape(int width, int height)
+{
+
+    windW = (GLint)width;
+    windH = (GLint)height;
+
+    glViewport(0, 0, windW, windH);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    gluOrtho2D(0, windW, 0, windH);
+    glMatrixMode(GL_MODELVIEW);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+
+    switch (key) {
+      case 27:
+        exit(1);
+      case 'Z':
+       zoom += 0.2;
+       break;
+      case 'z':
+       zoom -= 0.2;
+       if (zoom < 0.2) {
+           zoom = 0.2;
+       }
+       break;
+      default:
+       return;
+    }
+
+    glutPostRedisplay();
+}
+
+static void Mouse(int button, int state, int mouseX, int mouseY)
+{
+    if (state != GLUT_DOWN)
+       return;
+    x = (GLint)mouseX;
+    y = (GLint)mouseY;
+
+    glutPostRedisplay();
+}
+
+static void Draw(void)
+{
+
+    glClear(GL_COLOR_BUFFER_BIT);
+
+    point[0] = (windW / 2) - (image->sizeX / 2);
+    point[1] = (windH / 2) - (image->sizeY / 2);
+    point[2] = 0;
+    glRasterPos3fv(point);
+
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    glPixelZoom(1.0, 1.0);
+    glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
+                image->data);
+
+    point[0] = (float)x;
+    point[1] = windH - (float)y;
+    point[2] = 0.0;
+    glRasterPos3fv(point);
+
+    glPixelZoom(zoom, zoom);
+    glCopyPixels((windW/2)-(image->sizeX/2),
+                (windH/2)-(image->sizeY/2),
+                image->sizeX, image->sizeY, GL_COLOR);
+
+    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 {
+               fileName = 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 (fileName == 0) {
+       printf("No image file.\n");
+       exit(1);
+    }
+
+    image = LoadPPM(fileName);
+
+    windW = 300;
+    windH = 300;
+    glutInitWindowPosition(0, 0); glutInitWindowSize( windW, windH);
+
+    type = GLUT_RGB;
+    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+    glutInitDisplayMode(type);
+
+    if (glutCreateWindow("Copy Test") == GL_FALSE) {
+       exit(1);
+    }
+
+    Init();
+
+    glutReshapeFunc(Reshape);
+    glutKeyboardFunc(Key);
+    glutMouseFunc(Mouse);
+    glutDisplayFunc(Draw);
+    glutMainLoop();
+       return 0;
+}