added _mesa_get_teximages_from_driver()

2 files changed, 60 insertions, 4 deletions

diff --git a/src/mesa/main/teximage.c b/src/mesa/main/teximage.c
index b817b84bd3d..83736cf2303 100644
--- a/src/mesa/main/teximage.c
+++ b/src/mesa/main/teximage.c
@@ -1,4 +1,4 @@
-/* $Id: teximage.c,v 1.39.4.6 2000/09/28 18:25:00 brianp Exp $ */
+/* $Id: teximage.c,v 1.39.4.7 2000/10/16 23:37:16 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -1940,6 +1940,56 @@ _mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
 }
 
 
+/*
+ * Get all the mipmap images for a texture object from the device driver.
+ * Actually, only get mipmap images if we're using a mipmap filter.
+ */
+GLboolean
+_mesa_get_teximages_from_driver(GLcontext *ctx,
+                                struct gl_texture_object *texObj)
+{
+   if (ctx->Driver.GetTexImage) {
+      static const GLenum targets[] = {
+         GL_TEXTURE_1D,
+         GL_TEXTURE_2D,
+         GL_TEXTURE_3D,
+         GL_TEXTURE_CUBE_MAP_ARB,
+         GL_TEXTURE_CUBE_MAP_ARB,
+         GL_TEXTURE_CUBE_MAP_ARB
+      };
+      GLboolean needLambda = (texObj->MinFilter != texObj->MagFilter);
+      GLenum target = targets[texObj->Dimensions - 1];
+      if (needLambda) {
+         GLint level;
+         /* Get images for all mipmap levels.  We might not need them
+          * all but this is easier.  We're on a (slow) software path
+          * anyway.
+          */
+         for (level = 0; level <= texObj->P; level++) {
+            struct gl_texture_image *texImg = texObj->Image[level];
+            if (texImg && !texImg->Data) {
+               _mesa_get_teximage_from_driver(ctx, target, level, texObj);
+               if (!texImg->Data)
+                  return GL_FALSE;  /* out of memory */
+            }
+         }
+      }
+      else {
+         GLint level = texObj->BaseLevel;
+         struct gl_texture_image *texImg = texObj->Image[level];
+         if (texImg && !texImg->Data) {
+            _mesa_get_teximage_from_driver(ctx, target, level, texObj);
+            if (!texImg->Data)
+               return GL_FALSE;  /* out of memory */
+         }
+      }
+      return GL_TRUE;
+   }
+   return GL_FALSE;
+}
+
+
+
 void
 _mesa_GetTexImage( GLenum target, GLint level, GLenum format,
                    GLenum type, GLvoid *pixels )
diff --git a/src/mesa/main/teximage.h b/src/mesa/main/teximage.h
index 0a900339f6d..a0c7dd22eb0 100644
--- a/src/mesa/main/teximage.h
+++ b/src/mesa/main/teximage.h
@@ -1,4 +1,4 @@
-/* $Id: teximage.h,v 1.11.4.1 2000/08/29 22:58:57 brianp Exp $ */
+/* $Id: teximage.h,v 1.11.4.2 2000/10/16 23:37:16 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -65,8 +65,14 @@ _mesa_select_tex_image(GLcontext *ctx, const struct gl_texture_unit *texUnit,
 
 
 extern void
-_mesa_get_teximage_from_driver( GLcontext *ctx, GLenum target, GLint level,
-                                const struct gl_texture_object *texObj );
+_mesa_get_teximage_from_driver(GLcontext *ctx, GLenum target, GLint level,
+                               const struct gl_texture_object *texObj);
+
+
+extern GLboolean
+_mesa_get_teximages_from_driver(GLcontext *ctx,
+                                struct gl_texture_object *texObj);
+
 
 
 /*** API entry point functions ***/