1 files changed, 83 insertions, 0 deletions
diff --git a/3rdparty/tinygl-0.4-ugfx/src/oscontext.c b/3rdparty/tinygl-0.4-ugfx/src/oscontext.c
new file mode 100644
index 00000000..f91374d3
--- /dev/null
+++ b/3rdparty/tinygl-0.4-ugfx/src/oscontext.c
@@ -0,0 +1,83 @@
+#include <GL/oscontext.h>
+#include "zbuffer.h"
+#include "zgl.h"
+#include <GL/gl.h>
+#include <stdlib.h>
+
+static int buffercnt = 0;
+
+ostgl_context *
+ostgl_create_context(const int xsize,
+                     const int ysize,
+                     const int depth,
+                     void **framebuffers,
+                     const int numbuffers)
+{
+  ostgl_context *context;
+  int i;
+  ZBuffer *zb;
+   
+  gl_assert(depth == 16); /* support for other depths must include bpp
+                          convertion */
+  gl_assert(numbuffers >= 1);
+  
+  context = gl_malloc(sizeof(ostgl_context));
+  gl_assert(context);
+  context->zbs = gl_malloc(sizeof(void*)*numbuffers);
+  context->framebuffers = gl_malloc(sizeof(void*)*numbuffers);
+  
+  gl_assert(context->zbs != NULL && context->framebuffers != NULL);
+  
+  for (i = 0; i < numbuffers; i++) {
+    context->framebuffers[i] = framebuffers[i];
+    zb = ZB_open(xsize, ysize, ZB_MODE_5R6G5B, 0, NULL, NULL, framebuffers[i]);
+    if (zb == NULL) {
+      fprintf(stderr, "Error while initializing Z buffer\n");
+      exit(1);
+    }
+    context->zbs[i] = zb;
+  }
+  if (++buffercnt == 1) {
+    glInit(context->zbs[0]);
+  }
+  context->xsize = xsize;
+  context->ysize = ysize;
+  context->numbuffers = numbuffers;
+  return context;
+}
+
+void
+ostgl_delete_context(ostgl_context *context)
+{
+  int i;
+  for (i = 0; i < context->numbuffers; i++) {
+    ZB_close(context->zbs[i]);
+  }
+  gl_free(context->zbs);
+  gl_free(context->framebuffers);
+  gl_free(context);
+  
+  if (--buffercnt == 0) {
+    glClose();
+  }
+}
+
+void
+ostgl_make_current(ostgl_context *oscontext, const int idx)
+{
+  GLContext *context = gl_get_context();
+  gl_assert(idx < oscontext->numbuffers);
+  context->zb = oscontext->zbs[idx];
+}
+
+void
+ostgl_resize(ostgl_context *context,
+             const int xsize,
+             const int ysize,
+             void **framebuffers)
+{
+  int i;
+  for (i = 0; i < context->numbuffers; i++) {
+    ZB_resize(context->zbs[i], framebuffers[i], xsize, ysize);
+  }
+}