From 1ee3bcfff08599961c69549a1ad699c02df49bec Mon Sep 17 00:00:00 2001
From: Patrice Mandin <patmandin@gmail.com>
Date: Mon, 27 Jul 2009 10:57:53 +0200
Subject: nouveau: swizzle a single row or column, doing it one pixel at a time

---
 src/gallium/drivers/nv04/nv04_surface_2d.c | 108 +++++++++++++++++++++--------
 1 file changed, 80 insertions(+), 28 deletions(-)

(limited to 'src/gallium')

diff --git a/src/gallium/drivers/nv04/nv04_surface_2d.c b/src/gallium/drivers/nv04/nv04_surface_2d.c
index aba40cfaff..bbbcb54c46 100644
--- a/src/gallium/drivers/nv04/nv04_surface_2d.c
+++ b/src/gallium/drivers/nv04/nv04_surface_2d.c
@@ -209,6 +209,43 @@ nv04_surface_copy_m2mf(struct nv04_surface_2d *ctx,
 	return 0;
 }
 
+static int
+nv04_surface_copy_m2mf_swizzle(struct nv04_surface_2d *ctx,
+			       struct pipe_surface *dst, int dx, int dy,
+			       struct pipe_surface *src, int sx, int sy)
+{
+	struct nouveau_channel *chan = ctx->m2mf->channel;
+	struct nouveau_grobj *m2mf = ctx->m2mf;
+	struct nouveau_bo *src_bo = nouveau_bo(ctx->buf(src));
+	struct nouveau_bo *dst_bo = nouveau_bo(ctx->buf(dst));
+	unsigned src_pitch = ((struct nv04_surface *)src)->pitch;
+	unsigned dst_pitch = ((struct nv04_surface *)dst)->pitch;
+	unsigned dst_offset = dst->offset + nv04_swizzle_bits(dx, dy) *
+	                      dst->texture->block.size;
+	unsigned src_offset = src->offset + sy * src_pitch +
+	                      sx * src->texture->block.size;
+
+	BEGIN_RING(chan, m2mf, NV04_MEMORY_TO_MEMORY_FORMAT_DMA_BUFFER_IN, 2);
+	OUT_RELOCo(chan, src_bo,
+		   NOUVEAU_BO_GART | NOUVEAU_BO_VRAM | NOUVEAU_BO_RD);
+	OUT_RELOCo(chan, dst_bo,
+		   NOUVEAU_BO_GART | NOUVEAU_BO_VRAM | NOUVEAU_BO_WR);
+
+	BEGIN_RING(chan, m2mf, NV04_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
+	OUT_RELOCl(chan, src_bo, src_offset,
+		   NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_RD);
+	OUT_RELOCl(chan, dst_bo, dst_offset,
+		   NOUVEAU_BO_VRAM | NOUVEAU_BO_GART | NOUVEAU_BO_WR);
+	OUT_RING  (chan, src_pitch);
+	OUT_RING  (chan, dst_pitch);
+	OUT_RING  (chan, 1 * src->texture->block.size);
+	OUT_RING  (chan, 1);
+	OUT_RING  (chan, 0x0101);
+	OUT_RING  (chan, 0);
+
+	return 0;
+}
+
 static int
 nv04_surface_copy_blit(struct nv04_surface_2d *ctx, struct pipe_surface *dst,
 		       int dx, int dy, struct pipe_surface *src, int sx, int sy,
@@ -258,42 +295,57 @@ nv04_surface_copy(struct nv04_surface_2d *ctx, struct pipe_surface *dst,
 	assert(src->format == dst->format);
 
 	/* Setup transfer to swizzle the texture to vram if needed */
-	if (src_linear && !dst_linear && w > 1 && h > 1) {
-		int potWidth = 1<<log2i(w);
-		int potHeight = 1<<log2i(h);
-		int remainWidth = w-potWidth;
-		int remainHeight = h-potHeight;
-		int squareDim = (potWidth>potHeight ? potHeight : potWidth);
+	if (src_linear && !dst_linear) {
 		int x,y;
 
-		/* top left is always POT, but we can only swizzle squares */
-		for (y=0; y<potHeight; y+=squareDim) {
-			for (x=0; x<potWidth; x+= squareDim) {
-				nv04_surface_copy_swizzle(ctx, dst, dx+x, dy+y,
-				                          src, sx+x, sy+y,
-				                          squareDim, squareDim);
+		if ((w>1) && (h>1)) {
+			int potWidth = 1<<log2i(w);
+			int potHeight = 1<<log2i(h);
+			int remainWidth = w-potWidth;
+			int remainHeight = h-potHeight;
+			int squareDim = (potWidth>potHeight ? potHeight : potWidth);
+
+			/* top left is always POT, but we can only swizzle squares */
+			for (y=0; y<potHeight; y+=squareDim) {
+				for (x=0; x<potWidth; x+= squareDim) {
+					nv04_surface_copy_swizzle(ctx, dst, dx+x, dy+y,
+					                          src, sx+x, sy+y,
+					                          squareDim, squareDim);
+				}
 			}
-		}
 
-		/* top right */
-		if (remainWidth>0) {
+			/* top right */
+			if (remainWidth>0) {
 			nv04_surface_copy(ctx, dst, dx+potWidth, dy,
-			                  src, sx+potWidth, sy,
-			                  remainWidth, potHeight);
-		}
+				                  src, sx+potWidth, sy,
+				                  remainWidth, potHeight);
+			}
 
-		/* bottom left */
-		if (remainHeight>0) {
-			nv04_surface_copy(ctx, dst, dx, dy+potHeight,
+			/* bottom left */
+			if (remainHeight>0) {
+				nv04_surface_copy(ctx, dst, dx, dy+potHeight,
 			                  src, sx, sy+potHeight,
-			                  potWidth, remainHeight);
-		}
+				                  potWidth, remainHeight);
+			}
 
-		/* bottom right */
-		if ((remainWidth>0) && (remainHeight>0)) {
-			nv04_surface_copy(ctx, dst, dx+potWidth, dy+potHeight,
-			                  src, sx+potWidth, sy+potHeight,
-			                  remainWidth, remainHeight);
+			/* bottom right */
+			if ((remainWidth>0) && (remainHeight>0)) {
+				nv04_surface_copy(ctx, dst, dx+potWidth, dy+potHeight,
+				                  src, sx+potWidth, sy+potHeight,
+				                  remainWidth, remainHeight);
+			}
+		} else if (w==1) {
+			/* We have a column to copy to a swizzled texture */
+			for (y=0; y<h; y++) {
+				nv04_surface_copy_m2mf_swizzle(ctx, dst, dx, dy+y,
+				                               src, sx, sy+y);
+			}
+		} else if (h==1) {
+			/* We have a row to copy to a swizzled texture */
+			for (x=0; x<w; x++) {
+				nv04_surface_copy_m2mf_swizzle(ctx, dst, dx+x, dy,
+				                               src, sx+x, sy);
+			}
 		}
 
 		return;
-- 
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