[intel] Fix and reenable (software) SGIS_generate_mipmap

The core problem was that _mesa_generate_mipmap was not respecting RowStride
of the source image.  Additionally, the intel private data associated with the
images (level and face) was not being initialized for the
_mesa_generate_mipmap-generated images.

7 files changed, 70 insertions, 26 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 6610771b6e..7637585033 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -351,7 +351,7 @@ intel_miptree_image_data(struct intel_context *intel,
    GLuint i;
    GLuint height = 0;
 
-   DBG("%s\n", __FUNCTION__);
+   DBG("%s: %d/%d\n", __FUNCTION__, face, level);
    for (i = 0; i < depth; i++) {
       height = dst->level[level].height;
       if(dst->compressed)
diff --git a/src/mesa/drivers/dri/intel/intel_tex.c b/src/mesa/drivers/dri/intel/intel_tex.c
index e02972ec63..f016b6b4dc 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.c
+++ b/src/mesa/drivers/dri/intel/intel_tex.c
@@ -1,5 +1,6 @@
 #include "swrast/swrast.h"
 #include "texobj.h"
+#include "mipmap.h"
 #include "intel_context.h"
 #include "intel_mipmap_tree.h"
 #include "intel_tex.h"
@@ -156,6 +157,46 @@ timed_memcpy(void *dest, const void *src, size_t n)
 }
 #endif /* DO_DEBUG */
 
+/**
+ * Generate new mipmap data from BASE+1 to BASE+p (the minimally-sized mipmap
+ * level).
+ *
+ * The texture object's miptree must be mapped.
+ *
+ * It would be really nice if this was just called by Mesa whenever mipmaps
+ * needed to be regenerated, rather than us having to remember to do so in
+ * each texture image modification path.
+ *
+ * This function should also include an accelerated path.
+ */
+void
+intel_generate_mipmap(GLcontext *ctx, GLenum target,
+                      const struct gl_texture_unit *texUnit,
+                      struct gl_texture_object *texObj)
+{
+   struct intel_texture_object *intelObj = intel_texture_object(texObj);
+   GLuint nr_faces = (intelObj->base.Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+   int face, i;
+
+   _mesa_generate_mipmap(ctx, target, texUnit, texObj);
+
+   /* Update the level information in our private data in the new images, since
+    * it didn't get set as part of a normal TexImage path.
+    */
+   for (face = 0; face < nr_faces; face++) {
+      for (i = texObj->BaseLevel + 1; i < texObj->MaxLevel; i++) {
+         struct intel_texture_image *intelImage;
+
+	 intelImage = intel_texture_image(texObj->Image[face][i]);
+	 if (intelImage == NULL)
+	    break;
+
+	 intelImage->level = i;
+	 intelImage->face = face;
+      }
+   }
+}
+
 
 void
 intelInitTextureFuncs(struct dd_function_table *functions)
diff --git a/src/mesa/drivers/dri/intel/intel_tex.h b/src/mesa/drivers/dri/intel/intel_tex.h
index b77d7a1d8a..2973e0ceb9 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.h
+++ b/src/mesa/drivers/dri/intel/intel_tex.h
@@ -148,4 +148,8 @@ void intel_tex_unmap_images(struct intel_context *intel,
 
 int intel_compressed_num_bytes(GLuint mesaFormat);
 
+void intel_generate_mipmap(GLcontext *ctx, GLenum target,
+			   const struct gl_texture_unit *texUnit,
+			   struct gl_texture_object *texObj);
+
 #endif
diff --git a/src/mesa/drivers/dri/intel/intel_tex_copy.c b/src/mesa/drivers/dri/intel/intel_tex_copy.c
index f1a455a04c..521ce06640 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_copy.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_copy.c
@@ -29,6 +29,7 @@
 #include "enums.h"
 #include "image.h"
 #include "teximage.h"
+#include "mipmap.h"
 #include "swrast/swrast.h"
 
 #include "intel_screen.h"
@@ -85,12 +86,14 @@ get_teximage_source(struct intel_context *intel, GLenum internalFormat)
 
 static GLboolean
 do_copy_texsubimage(struct intel_context *intel,
+		    GLenum target,
                     struct intel_texture_image *intelImage,
                     GLenum internalFormat,
                     GLint dstx, GLint dsty,
                     GLint x, GLint y, GLsizei width, GLsizei height)
 {
    GLcontext *ctx = &intel->ctx;
+   struct gl_texture_object *texObj = intelImage->base.TexObject;
    const struct intel_region *src =
       get_teximage_source(intel, internalFormat);
 
@@ -156,16 +159,12 @@ do_copy_texsubimage(struct intel_context *intel,
 
    UNLOCK_HARDWARE(intel);
 
-#if 0
-   /* GL_SGIS_generate_mipmap -- this can be accelerated now.
-    * XXX Add a ctx->Driver.GenerateMipmaps() function?
-    */
-   if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+   /* GL_SGIS_generate_mipmap */
+   if (intelImage->level == texObj->BaseLevel && texObj->GenerateMipmap) {
       intel_generate_mipmap(ctx, target,
                             &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
                             texObj);
    }
-#endif
 
    return GL_TRUE;
 }
@@ -197,7 +196,7 @@ intelCopyTexImage1D(GLcontext * ctx, GLenum target, GLint level,
                           GL_RGBA, CHAN_TYPE, NULL,
                           &ctx->DefaultPacking, texObj, texImage);
 
-   if (!do_copy_texsubimage(intel_context(ctx),
+   if (!do_copy_texsubimage(intel_context(ctx), target,
                             intel_texture_image(texImage),
                             internalFormat, 0, 0, x, y, width, 1))
       goto fail;
@@ -234,7 +233,7 @@ intelCopyTexImage2D(GLcontext * ctx, GLenum target, GLint level,
                           &ctx->DefaultPacking, texObj, texImage);
 
 
-   if (!do_copy_texsubimage(intel_context(ctx),
+   if (!do_copy_texsubimage(intel_context(ctx), target,
                             intel_texture_image(texImage),
                             internalFormat, 0, 0, x, y, width, height))
       goto fail;
@@ -264,7 +263,7 @@ intelCopyTexSubImage1D(GLcontext * ctx, GLenum target, GLint level,
    /* Need to check texture is compatible with source format. 
     */
 
-   if (!do_copy_texsubimage(intel_context(ctx),
+   if (!do_copy_texsubimage(intel_context(ctx), target,
                             intel_texture_image(texImage),
                             internalFormat, xoffset, 0, x, y, width, 1)) {
       _swrast_copy_texsubimage1d(ctx, target, level, xoffset, x, y, width);
@@ -290,7 +289,7 @@ intelCopyTexSubImage2D(GLcontext * ctx, GLenum target, GLint level,
    /* Need to check texture is compatible with source format. 
     */
 
-   if (!do_copy_texsubimage(intel_context(ctx),
+   if (!do_copy_texsubimage(intel_context(ctx), target,
                             intel_texture_image(texImage),
                             internalFormat,
                             xoffset, yoffset, x, y, width, height)) {
diff --git a/src/mesa/drivers/dri/intel/intel_tex_image.c b/src/mesa/drivers/dri/intel/intel_tex_image.c
index c2af74095c..4f5f75d049 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_image.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_image.c
@@ -466,6 +466,7 @@ intelTexImage(GLcontext * ctx,
                                                intelImage->level,
                                                &dstRowStride,
                                                intelImage->base.ImageOffsets);
+      texImage->RowStride = dstRowStride / intelImage->mt->cpp;
    }
    else {
       /* Allocate regular memory and store the image there temporarily.   */
@@ -483,8 +484,8 @@ intelTexImage(GLcontext * ctx,
       texImage->Data = malloc(sizeInBytes);
    }
 
-   DBG("Upload image %dx%dx%d row_len %x "
-       "pitch %x\n",
+   DBG("Upload image %dx%dx%d row_len %d "
+       "pitch %d\n",
        width, height, depth, width * texelBytes, dstRowStride);
 
    /* Copy data.  Would like to know when it's ok for us to eg. use
@@ -504,6 +505,13 @@ intelTexImage(GLcontext * ctx,
       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
    }
 
+   /* GL_SGIS_generate_mipmap */
+   if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
+      intel_generate_mipmap(ctx, target,
+                            &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
+                            texObj);
+   }
+
    _mesa_unmap_teximage_pbo(ctx, unpack);
 
    if (intelImage->mt) {
@@ -512,16 +520,6 @@ intelTexImage(GLcontext * ctx,
    }
 
    UNLOCK_HARDWARE(intel);
-
-#if 0
-   /* GL_SGIS_generate_mipmap -- this can be accelerated now.
-    */
-   if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
-      intel_generate_mipmap(ctx, target,
-                            &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
-                            texObj);
-   }
-#endif
 }
 
 void
diff --git a/src/mesa/drivers/dri/intel/intel_tex_subimage.c b/src/mesa/drivers/dri/intel/intel_tex_subimage.c
index 5410df203f..bd27b86bf3 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_subimage.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_subimage.c
@@ -90,14 +90,12 @@ intelTexSubimage(GLcontext * ctx,
       _mesa_error(ctx, GL_OUT_OF_MEMORY, "intelTexSubImage");
    }
 
-#if 0
    /* GL_SGIS_generate_mipmap */
    if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
-      _mesa_generate_mipmap(ctx, target,
+      intel_generate_mipmap(ctx, target,
                             &ctx->Texture.Unit[ctx->Texture.CurrentUnit],
                             texObj);
    }
-#endif
 
    _mesa_unmap_teximage_pbo(ctx, packing);
 
diff --git a/src/mesa/drivers/dri/intel/intel_tex_validate.c b/src/mesa/drivers/dri/intel/intel_tex_validate.c
index 8df66ad445..d260a721d9 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_validate.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_validate.c
@@ -75,6 +75,10 @@ intel_calculate_first_last_level(struct intel_texture_object *intelObj)
    intelObj->lastLevel = lastLevel;
 }
 
+/**
+ * Copies the image's contents at its level into the object's miptree,
+ * and updates the image to point at the object's miptree.
+ */
 static void
 copy_image_data_to_tree(struct intel_context *intel,
                         struct intel_texture_object *intelObj,