radeon: update miptree code a little

Simplify gl image level <-> miptree level mapping (are equal now).
Don't allocate miptree for images that won't fit in it (fixes #25230).

1 files changed, 32 insertions, 4 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_texture.c b/src/mesa/drivers/dri/radeon/radeon_texture.c
index c715650d55..0390d376ba 100644
--- a/src/mesa/drivers/dri/radeon/radeon_texture.c
+++ b/src/mesa/drivers/dri/radeon/radeon_texture.c
@@ -509,6 +509,27 @@ gl_format radeonChooseTextureFormat(GLcontext * ctx,
 	return MESA_FORMAT_NONE;		/* never get here */
 }
 
+/** Check if given image is valid within current texture object.
+ */
+static int image_matches_texture_obj(struct gl_texture_object *texObj,
+	struct gl_texture_image *texImage,
+	unsigned level)
+{
+	const struct gl_texture_image *baseImage = texObj->Image[0][level];
+
+	if (level < texObj->BaseLevel || level > texObj->MaxLevel)
+		return 0;
+
+	const unsigned levelDiff = level - texObj->BaseLevel;
+	const unsigned refWidth = baseImage->Width >> levelDiff;
+	const unsigned refHeight = baseImage->Height >> levelDiff;
+	const unsigned refDepth = baseImage->Depth >> levelDiff;
+
+	return (texImage->Width == refWidth &&
+			texImage->Height == refHeight &&
+			texImage->Depth == refDepth);
+}
+
 static void teximage_assign_miptree(radeonContextPtr rmesa,
 	struct gl_texture_object *texObj,
 	struct gl_texture_image *texImage,
@@ -518,9 +539,14 @@ static void teximage_assign_miptree(radeonContextPtr rmesa,
 	radeonTexObj *t = radeon_tex_obj(texObj);
 	radeon_texture_image* image = get_radeon_texture_image(texImage);
 
+	/* Since miptree holds only images for levels <BaseLevel..MaxLevel>
+	 * don't allocate the miptree if the teximage won't fit.
+	 */
+	if (!image_matches_texture_obj(texObj, texImage, level))
+		return;
+
 	/* Try using current miptree, or create new if there isn't any */
-	if (!t->mt || !radeon_miptree_matches_image(t->mt, texImage, face,
-					radeon_gl_level_to_miptree_level(texObj, level))) {
+	if (!t->mt || !radeon_miptree_matches_image(t->mt, texImage, face, level)) {
 		radeon_miptree_unreference(&t->mt);
 		radeon_try_alloc_miptree(rmesa, t);
 		if (RADEON_DEBUG & RADEON_TEXTURE) {
@@ -534,7 +560,7 @@ static void teximage_assign_miptree(radeonContextPtr rmesa,
 	 * when there was no image for baselevel specified */
 	if (t->mt) {
 		image->mtface = face;
-		image->mtlevel = radeon_gl_level_to_miptree_level(texObj, level);
+		image->mtlevel = level;
 		radeon_miptree_reference(t->mt, &image->mt);
 	}
 }
@@ -590,6 +616,8 @@ static void radeon_store_teximage(GLcontext* ctx, int dims,
 		dstRowStride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width);
 	}
 
+	assert(dstRowStride);
+
 	if (dims == 3) {
 		unsigned alignedWidth = dstRowStride/_mesa_get_format_bytes(texImage->TexFormat);
 		dstImageOffsets = allocate_image_offsets(ctx, alignedWidth, texImage->Height, texImage->Depth);
@@ -704,7 +732,7 @@ static void radeon_teximage(
 
 	if (!t->bo) {
 		teximage_assign_miptree(rmesa, texObj, texImage, face, level);
-		if (!t->mt) {
+		if (!image->mt) {
 			int size = _mesa_format_image_size(texImage->TexFormat,
 								texImage->Width,
 								texImage->Height,