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-rw-r--r--src/mesa/main/formats.c16
-rw-r--r--src/mesa/main/formats.h3
2 files changed, 19 insertions, 0 deletions
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 773a8f70b3..72d043c4c3 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -753,6 +753,22 @@ _mesa_get_format_base_format(gl_format format)
}
+/**
+ * Return the block size (in pixels) for the given format. Normally
+ * the block size is 1x1. But compressed formats will have block sizes
+ * of 4x4 or 8x4 pixels, etc.
+ * \param bw returns block width in pixels
+ * \param bh returns block height in pixels
+ */
+void
+_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ *bw = info->BlockWidth;
+ *bh = info->BlockHeight;
+}
+
+
/** Is the given format a compressed format? */
GLboolean
_mesa_is_format_compressed(gl_format format)
diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index 72f1b1e287..91ea023077 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -155,6 +155,9 @@ _mesa_get_format_datatype(gl_format format);
extern GLenum
_mesa_get_format_base_format(gl_format format);
+extern void
+_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh);
+
extern GLboolean
_mesa_is_format_compressed(gl_format format);