EXA: Added pitch limitations.

Drivers can now specify the max pitches that the accelerator supports.

1 files changed, 32 insertions, 1 deletions

diff --git a/exa/exa.h b/exa/exa.h
index 9ea593381..491e6b16b 100644
--- a/exa/exa.h
+++ b/exa/exa.h
@@ -39,7 +39,7 @@
 #include "fb.h"
 
 #define EXA_VERSION_MAJOR   2
-#define EXA_VERSION_MINOR   2
+#define EXA_VERSION_MINOR   3
 #define EXA_VERSION_RELEASE 0
 
 typedef struct _ExaOffscreenArea ExaOffscreenArea;
@@ -671,6 +671,37 @@ typedef struct _ExaDriver {
 	 */
 	#define EXA_PREPARE_MASK	2
 	/** @} */
+
+    /**
+     * maxPitchPixels controls the pitch limitation for rendering from
+     * the card.
+     * The driver should never receive a request for rendering a pixmap
+     * that has a pitch (in pixels) beyond maxPitchPixels.
+     *
+     * Setting this field is optional -- if your hardware doesn't have
+     * a pitch limitation in pixels, don't set this. If neither this value
+     * nor maxPitchBytes is set, then maxPitchPixels is set to maxX.
+     * If set, it must not be smaller than maxX.
+     *
+     * @sa maxPitchBytes
+     */
+    int maxPitchPixels;
+
+    /**
+     * maxPitchBytes controls the pitch limitation for rendering from
+     * the card.
+     * The driver should never receive a request for rendering a pixmap
+     * that has a pitch (in bytes) beyond maxPitchBytes.
+     *
+     * Setting this field is optional -- if your hardware doesn't have
+     * a pitch limitation in bytes, don't set this.
+     * If set, it must not be smaller than maxX * 4.
+     * There's no default value for maxPitchBytes.
+     *
+     * @sa maxPitchPixels
+     */
+    int maxPitchBytes;
+
     /** @} */
 } ExaDriverRec, *ExaDriverPtr;