(no commit message)

[gacela.git] / src / gacela_GL.c

diff --git a/src/gacela_GL.c b/src/gacela_GL.c
index c261fa2a1d9e4a8238da59da12f973061544ff20..a031dbae69bd7f6ab1edcfc0a32654b11a555940 100644 (file)
--- a/src/gacela_GL.c
+++ b/src/gacela_GL.c
@@ -20,6 +20,76 @@
 #include <GL/glu.h>
 #include "gacela_GL.h"
 
+
+struct glTexture
+{
+  GLuint texture_id;
+  int width, height;
+};
+
+static scm_t_bits glTexture_tag;
+
+SCM
+make_glTexture (GLuint texture_id)
+{
+  SCM smob;
+  struct glTexture *glTexture;
+
+  glTexture = (struct glTexture *) scm_gc_malloc (sizeof (struct glTexture), "glTexture");
+
+  glTexture->texture_id = 0;
+
+  SCM_NEWSMOB (smob, glTexture_tag, glTexture);
+
+  glTexture->texture_id = texture_id;
+
+  return smob;
+}
+
+GLuint
+get_glTexture_id (SCM glTexture_smob)
+{
+  struct glTexture *glTexture;
+
+  scm_assert_smob_type (glTexture_tag, glTexture_smob);
+  glTexture = (struct glTexture *) SCM_SMOB_DATA (glTexture_smob);
+  return glTexture->texture_id;
+}
+
+SCM
+get_glTexture_width (SCM glTexture_smob)
+{
+  struct glTexture *glTexture;
+
+  scm_assert_smob_type (glTexture_tag, glTexture_smob);
+  glTexture = (struct glTexture *) SCM_SMOB_DATA (glTexture_smob);
+  return scm_from_int (glTexture->width);
+}
+
+SCM
+get_glTexture_height (SCM glTexture_smob)
+{
+  struct glTexture *glTexture;
+
+  scm_assert_smob_type (glTexture_tag, glTexture_smob);
+  glTexture = (struct glTexture *) SCM_SMOB_DATA (glTexture_smob);
+  return scm_from_int (glTexture->height);
+}
+
+size_t
+free_glTexture (SCM glTexture_smob)
+{
+  struct glTexture *glTexture = (struct glTexture *) SCM_SMOB_DATA (glTexture_smob);
+  GLuint text[1];
+
+  text[0] = glTexture->texture_id;
+  glDeleteTextures (1, &text[0]);
+  scm_gc_free (glTexture, sizeof (struct glTexture), "glTexture");
+
+  return 0;
+}
+
+
 SCM
 gacela_glBegin (SCM mode)
 {
@@ -189,7 +259,7 @@ gacela_glDeleteTextures (SCM n, SCM textures)
 SCM
 gacela_glBindTexture (SCM target, SCM texture)
 {
-  glBindTexture (scm_to_int (target), scm_to_int (texture));
+  glBindTexture (scm_to_int (target), get_glTexture_id (texture));
   return SCM_UNSPECIFIED;
 }
 
@@ -295,6 +365,11 @@ gacela_gluLookAt (SCM eyeX, SCM eyeY, SCM eyeZ, SCM centerX, SCM centerY, SCM ce
 void*
 GL_register_functions (void* data)
 {
+  glTexture_tag = scm_make_smob_type ("glTexture", sizeof (struct glTexture));
+  scm_set_smob_free (glTexture_tag, free_glTexture);
+  scm_c_define_gsubr ("texture-w", 1, 0, 0, get_glTexture_width);
+  scm_c_define_gsubr ("texture-h", 1, 0, 0, get_glTexture_height);
+
   // Data types
   scm_c_define ("GL_UNSIGNED_BYTE", scm_from_int (GL_UNSIGNED_BYTE));