Gacela as Guile modules.

[gacela.git] / src / gacela_GL.c

diff --git a/src/gacela_GL.c b/src/gacela_GL.c
index 3bc341e6ee9a22c0c3f3c445289eb6e76574565a..541e4abea16e17d4e1ce7f1ec72e55a78abd46ad 100644 (file)
--- a/src/gacela_GL.c
+++ b/src/gacela_GL.c
@@ -24,6 +24,7 @@
 struct glTexture
 {
   GLuint texture_id;
+  int width, height;
 };
 
 static scm_t_bits glTexture_tag;
@@ -55,6 +56,38 @@ get_glTexture_id (SCM 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);
+}
+
+SCM
+set_glTexture_size (SCM glTexture_smob, SCM width, SCM height)
+{
+  struct glTexture *glTexture;
+
+  scm_assert_smob_type (glTexture_tag, glTexture_smob);
+  glTexture = (struct glTexture *) SCM_SMOB_DATA (glTexture_smob);
+  glTexture->width = scm_to_int (width);
+  glTexture->height = scm_to_int (height);
+  return SCM_UNSPECIFIED;
+}
+
 size_t
 free_glTexture (SCM glTexture_smob)
 {
@@ -214,7 +247,7 @@ gacela_glGenTextures (SCM n)
   glGenTextures (nint, &text[0]);
 
   for (i = nint - 1; i >= 0; i--) {
-    textures = scm_cons (scm_from_int (text[i]), textures);
+    textures = scm_cons (make_glTexture (text[i]), textures);
   }
 
   return textures;
@@ -238,7 +271,7 @@ 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;
 }
 
@@ -346,6 +379,9 @@ 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);
+  scm_c_define_gsubr ("set-texture-size!", 3, 0, 0, set_glTexture_size);
 
   // Data types
   scm_c_define ("GL_UNSIGNED_BYTE", scm_from_int (GL_UNSIGNED_BYTE));
@@ -381,6 +417,7 @@ GL_register_functions (void* data)
   // Blending
   scm_c_define ("GL_BLEND", scm_from_int (GL_BLEND));
   scm_c_define ("GL_ONE", scm_from_int (GL_ONE));
+  scm_c_define ("GL_ONE_MINUS_SRC_ALPHA", scm_from_int (GL_ONE_MINUS_SRC_ALPHA));
   scm_c_define ("GL_SRC_ALPHA", scm_from_int (GL_SRC_ALPHA));
 
   // Fog