From 1aebb6911e9aa1bd8900868b58d1750ca83a20c7 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <maraeo@gmail.com>
Date: Thu, 20 Dec 2012 03:45:49 +0100
Subject: [PATCH] r600g: implement 3D transfers

That means we can map and read multiple slices with one transfer_map call.
---
 src/gallium/drivers/r600/r600_texture.c | 54 +++++++++++++++++++--------------
 1 file changed, 32 insertions(+), 22 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_texture.c b/src/gallium/drivers/r600/r600_texture.c
index 0f67739..85da093 100644
--- a/src/gallium/drivers/r600/r600_texture.c
+++ b/src/gallium/drivers/r600/r600_texture.c
@@ -70,7 +70,7 @@ static void r600_copy_from_staging_texture(struct pipe_context *ctx, struct r600
 	struct pipe_resource *texture = transfer->resource;
 	struct pipe_box sbox;
 
-	u_box_origin_2d(transfer->box.width, transfer->box.height, &sbox);
+	u_box_3d(0, 0, 0, transfer->box.width, transfer->box.height, transfer->box.depth, &sbox);
 
 	ctx->resource_copy_region(ctx, texture, transfer->level,
 				  transfer->box.x, transfer->box.y, transfer->box.z,
@@ -722,7 +722,6 @@ static void *r600_texture_transfer_map(struct pipe_context *ctx,
 {
 	struct r600_context *rctx = (struct r600_context*)ctx;
 	struct r600_texture *rtex = (struct r600_texture*)texture;
-	struct pipe_resource resource;
 	struct r600_transfer *trans;
 	boolean use_staging_texture = FALSE;
 	enum pipe_format format = texture->format;
@@ -793,40 +792,51 @@ static void *r600_texture_transfer_map(struct pipe_context *ctx,
 					   0, 0);
 
 		trans->transfer.stride = staging_depth->surface.level[level].pitch_bytes;
+                trans->transfer.layer_stride = staging_depth->surface.level[level].slice_size;
 		trans->offset = r600_texture_get_offset(staging_depth, level, box->z);
 		trans->staging = (struct r600_resource*)staging_depth;
 	} else if (use_staging_texture) {
-		resource.target = PIPE_TEXTURE_2D;
+		struct pipe_resource resource;
+		struct r600_texture *staging;
+
+		memset(&resource, 0, sizeof(resource));
 		resource.format = texture->format;
 		resource.width0 = box->width;
 		resource.height0 = box->height;
 		resource.depth0 = 1;
 		resource.array_size = 1;
-		resource.last_level = 0;
-		resource.nr_samples = 0;
 		resource.usage = PIPE_USAGE_STAGING;
-		resource.bind = 0;
 		resource.flags = R600_RESOURCE_FLAG_TRANSFER;
-		/* For texture reading, the temporary (detiled) texture is used as
-		 * a render target when blitting from a tiled texture. */
-		if (usage & PIPE_TRANSFER_READ) {
-			resource.bind |= PIPE_BIND_RENDER_TARGET;
-		}
-		/* For texture writing, the temporary texture is used as a sampler
-		 * when blitting into a tiled texture. */
-		if (usage & PIPE_TRANSFER_WRITE) {
-			resource.bind |= PIPE_BIND_SAMPLER_VIEW;
+
+		/* We must set the correct texture target and dimensions if needed for a 3D transfer. */
+		if (box->depth > 1 && u_max_layer(texture, level) > 0)
+			resource.target = texture->target;
+		else
+			resource.target = PIPE_TEXTURE_2D;
+
+		switch (resource.target) {
+		case PIPE_TEXTURE_1D_ARRAY:
+		case PIPE_TEXTURE_2D_ARRAY:
+		case PIPE_TEXTURE_CUBE_ARRAY:
+			resource.array_size = box->depth;
+			break;
+		case PIPE_TEXTURE_3D:
+			resource.depth0 = box->depth;
+			break;
+		default:;
 		}
+
+
 		/* Create the temporary texture. */
-		trans->staging = (struct r600_resource*)ctx->screen->resource_create(ctx->screen, &resource);
-		if (trans->staging == NULL) {
+		staging = (struct r600_texture*)ctx->screen->resource_create(ctx->screen, &resource);
+		if (staging == NULL) {
 			R600_ERR("failed to create temporary texture to hold untiled copy\n");
 			FREE(trans);
 			return NULL;
 		}
-
-		trans->transfer.stride =
-			((struct r600_texture *)trans->staging)->surface.level[0].pitch_bytes;
+		trans->staging = &staging->resource;
+		trans->transfer.stride = staging->surface.level[0].pitch_bytes;
+		trans->transfer.layer_stride = staging->surface.level[0].slice_size;
 		if (usage & PIPE_TRANSFER_READ) {
 			r600_copy_to_staging_texture(ctx, trans);
 			/* Always referenced in the blit. */
@@ -839,9 +849,9 @@ static void *r600_texture_transfer_map(struct pipe_context *ctx,
 	}
 
 	if (trans->staging) {
-		buf = ((struct r600_resource *)trans->staging)->cs_buf;
+		buf = trans->staging->cs_buf;
 	} else {
-		buf = ((struct r600_resource *)texture)->cs_buf;
+		buf = rtex->resource.cs_buf;
 	}
 
 	if (rtex->is_depth || !trans->staging)
-- 
2.7.4