freedreno: helper for a3xx/a4xx border-colors

Both use the same layout for the buffer containing border-color values,
so rather than duplicating the logic in a4xx, split it out into a
helper.

Signed-off-by: Rob Clark <[email protected]>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_texture.h b/src/gallium/drivers/freedreno/freedreno_texture.h
index 43571a9fa61..fa27d1c32af 100644
--- a/src/gallium/drivers/freedreno/freedreno_texture.h
+++ b/src/gallium/drivers/freedreno/freedreno_texture.h
@@ -41,4 +41,35 @@ void fd_set_sampler_views(struct pipe_context *pctx, unsigned shader,
 
 void fd_texture_init(struct pipe_context *pctx);
 
+struct fd_texture_stateobj;
+
+/* Both a3xx/a4xx share the same layout for the border-color buffer,
+ * which contains the pre-swizzled (based on texture format) border
+ * color value, with the following layout (per sampler):
+ *
+ *  offset | description
+ *  -------+-------------
+ *  0x00:  | fp16[0]   \
+ *         | fp16[1]   |___ swizzled fp16 channel values for "small float"
+ *         | fp16[2]   |    formats (<= 16 bits per component, !integer)
+ *         | fp16[3]   /
+ *  0x08:  | padding
+ *  0x10:  | int16[0]  \
+ *         | int16[1]  |___ swizzled int16 channels for for "small integer"
+ *         | int16[2]  |    formats (<= 16 bits per component, integer)
+ *         | int16[3]  /
+ *  0x18:  | padding
+ *  0x20:  | fp32[0]   \
+ *         | fp32[1]   |___ swizzled fp32 channel values for "large float"
+ *         | fp32[2]   |    formats (> 16 bits per component, !integer)
+ *         | fp32[3]   /
+ *  0x30:  | int32[0]  \
+ *         | int32[1]  |___ swizzled int32 channel values for "large int"
+ *         | int32[2]  |    formats (> 16 bits per component, integer)
+ *         | int32[3]  /
+ */
+#define BORDERCOLOR_SIZE 0x40
+void fd_setup_border_colors(struct fd_texture_stateobj *tex, void *ptr,
+		unsigned offset);
+
 #endif /* FREEDRENO_TEXTURE_H_ */