1 files changed, 193 insertions, 0 deletions
diff --git a/3rdparty/tinygl-0.4-ugfx/examples/texobj.c b/3rdparty/tinygl-0.4-ugfx/examples/texobj.c
new file mode 100644
index 00000000..913d35aa
--- /dev/null
+++ b/3rdparty/tinygl-0.4-ugfx/examples/texobj.c
@@ -0,0 +1,193 @@
+/*
+ * Example of using the 1.1 texture object functions.
+ * Also, this demo utilizes Mesa's fast texture map path.
+ *
+ * Brian Paul   June 1996
+ */
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <GL/glx.h> 
+#include <GL/gl.h> 
+#include "ui.h"
+
+static GLuint TexObj[2];
+static GLfloat Angle = 0.0f;
+
+static int cnt=0,v=0;
+
+void 
+draw(void)
+{
+  glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
+
+  glColor3f(1.0, 1.0, 1.0);
+
+  /* draw first polygon */
+  glPushMatrix();
+  glTranslatef(-1.0, 0.0, 0.0);
+  glRotatef(Angle, 0.0, 0.0, 1.0);
+  glBindTexture(GL_TEXTURE_2D, TexObj[v]);
+
+  glEnable(GL_TEXTURE_2D);
+  glBegin(GL_QUADS);
+  glTexCoord2f(0.0, 0.0);
+  glVertex2f(-1.0, -1.0);
+  glTexCoord2f(1.0, 0.0);
+  glVertex2f(1.0, -1.0);
+  glTexCoord2f(1.0, 1.0);
+  glVertex2f(1.0, 1.0);
+  glTexCoord2f(0.0, 1.0);
+  glVertex2f(-1.0, 1.0);
+  glEnd();
+  glDisable(GL_TEXTURE_2D);
+  glPopMatrix();
+
+  /* draw second polygon */
+  glPushMatrix();
+  glTranslatef(1.0, 0.0, 0.0);
+  glRotatef(Angle - 90.0, 0.0, 1.0, 0.0);
+
+  glBindTexture(GL_TEXTURE_2D, TexObj[1-v]);
+
+  glEnable(GL_TEXTURE_2D);
+  glBegin(GL_QUADS);
+  glTexCoord2f(0.0, 0.0);
+  glVertex2f(-1.0, -1.0);
+  glTexCoord2f(1.0, 0.0);
+  glVertex2f(1.0, -1.0);
+  glTexCoord2f(1.0, 1.0);
+  glVertex2f(1.0, 1.0);
+  glTexCoord2f(0.0, 1.0);
+  glVertex2f(-1.0, 1.0);
+  glEnd();
+  glDisable(GL_TEXTURE_2D);
+
+  glPopMatrix();
+
+  tkSwapBuffers();
+}
+
+
+/* new window size or exposure */
+void 
+reshape(int width, int height)
+{
+  glViewport(0, 0, (GLint) width, (GLint) height);
+  glMatrixMode(GL_PROJECTION);
+  glLoadIdentity();
+  /* glOrtho( -3.0, 3.0, -3.0, 3.0, -10.0, 10.0 ); */
+  glFrustum(-2.0, 2.0, -2.0, 2.0, 6.0, 20.0);
+  glMatrixMode(GL_MODELVIEW);
+  glLoadIdentity();
+  glTranslatef(0.0, 0.0, -8.0);
+}
+
+
+void bind_texture(int texobj,int image)
+{
+  static int width = 8, height = 8;
+  static int color[2][3]={
+    {255,0,0},
+    {0,255,0},
+  };
+  GLubyte tex[64][3];
+  static GLubyte texchar[2][8*8] = {
+  {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0,
+    0, 0, 0, 1, 1, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0,
+    0, 0, 0, 1, 1, 1, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0},
+  {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 2, 2, 0, 0, 0,
+    0, 0, 2, 0, 0, 2, 0, 0,
+    0, 0, 0, 0, 0, 2, 0, 0,
+    0, 0, 0, 0, 2, 0, 0, 0,
+    0, 0, 0, 2, 0, 0, 0, 0,
+    0, 0, 2, 2, 2, 2, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0}};
+
+  int i,j;
+  
+  glBindTexture(GL_TEXTURE_2D, texobj);
+
+  /* red on white */
+  for (i = 0; i < height; i++) {
+    for (j = 0; j < width; j++) {
+      int p = i * width + j;
+      if (texchar[image][(height - i - 1) * width + j]) {
+        tex[p][0] = color[image][0];
+        tex[p][1] = color[image][1];
+        tex[p][2] = color[image][2];
+      } else {
+        tex[p][0] = 255;
+        tex[p][1] = 255;
+        tex[p][2] = 255;
+      }
+    }
+  }
+  glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0,
+    GL_RGB, GL_UNSIGNED_BYTE, tex);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+  /* end of texture object */
+}
+
+
+
+void 
+init(void)
+{
+  glEnable(GL_DEPTH_TEST);
+
+  /* Setup texturing */
+  glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
+  glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
+
+  /* generate texture object IDs */
+  glGenTextures(2, TexObj);
+  bind_texture(TexObj[0],0);
+  bind_texture(TexObj[1],1);
+  
+}
+
+void 
+idle(void)
+{
+  
+  Angle += 2.0;
+
+  if (++cnt==5) {
+    cnt=0;
+    v=!v;
+  }
+  draw();
+}
+
+/* change view angle, exit upon ESC */
+GLenum key(int k, GLenum mask)
+{
+   switch (k) {
+      case 'q':
+      case KEY_ESCAPE:
+          exit(0);
+   }
+   return GL_FALSE;
+}
+
+int main(int argc, char **argv) 
+{
+    return ui_loop(argc, argv, "texobj");
+}
+
+