freedreno: add generic blitter

Basically a clone of util_blitter_blit() but with special handling to
blit PIPE_BUFFER as a PIPE_TEXTURE_1D.

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

1 files changed, 112 insertions, 0 deletions

diff --git a/src/gallium/drivers/freedreno/freedreno_blitter.c b/src/gallium/drivers/freedreno/freedreno_blitter.c
new file mode 100644
index 00000000000..6fab261df9c
--- /dev/null
+++ b/src/gallium/drivers/freedreno/freedreno_blitter.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2017 Rob Clark <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Authors:
+ *    Rob Clark <[email protected]>
+ */
+
+#include "util/u_blitter.h"
+
+#include "freedreno_blitter.h"
+#include "freedreno_context.h"
+
+/* generic blit using u_blitter.. slightly modified version of util_blitter_blit
+ * which also handles PIPE_BUFFER:
+ */
+
+static void
+default_dst_texture(struct pipe_surface *dst_templ, struct pipe_resource *dst,
+		unsigned dstlevel, unsigned dstz)
+{
+	memset(dst_templ, 0, sizeof(*dst_templ));
+	if (dst->target == PIPE_BUFFER)
+		dst_templ->format = PIPE_FORMAT_R8_UINT;
+	else
+		dst_templ->format = util_format_linear(dst->format);
+	dst_templ->u.tex.level = dstlevel;
+	dst_templ->u.tex.first_layer = dstz;
+	dst_templ->u.tex.last_layer = dstz;
+}
+
+static void
+default_src_texture(struct pipe_sampler_view *src_templ,
+		struct pipe_resource *src, unsigned srclevel)
+{
+	bool cube_as_2darray = src->screen->get_param(src->screen,
+			PIPE_CAP_SAMPLER_VIEW_TARGET);
+
+	memset(src_templ, 0, sizeof(*src_templ));
+
+	if (cube_as_2darray && (src->target == PIPE_TEXTURE_CUBE ||
+			src->target == PIPE_TEXTURE_CUBE_ARRAY))
+		src_templ->target = PIPE_TEXTURE_2D_ARRAY;
+	else
+		src_templ->target = src->target;
+
+	if (src->target  == PIPE_BUFFER) {
+		src_templ->target = PIPE_TEXTURE_1D;
+		src_templ->format = PIPE_FORMAT_R8_UINT;
+	} else {
+		src_templ->format = util_format_linear(src->format);
+	}
+	src_templ->u.tex.first_level = srclevel;
+	src_templ->u.tex.last_level = srclevel;
+	src_templ->u.tex.first_layer = 0;
+	src_templ->u.tex.last_layer =
+			src->target == PIPE_TEXTURE_3D ? u_minify(src->depth0, srclevel) - 1
+					: (unsigned)(src->array_size - 1);
+	src_templ->swizzle_r = PIPE_SWIZZLE_X;
+	src_templ->swizzle_g = PIPE_SWIZZLE_Y;
+	src_templ->swizzle_b = PIPE_SWIZZLE_Z;
+	src_templ->swizzle_a = PIPE_SWIZZLE_W;
+}
+
+void
+fd_blitter_blit(struct fd_context *ctx, const struct pipe_blit_info *info)
+{
+	struct pipe_resource *dst = info->dst.resource;
+	struct pipe_resource *src = info->src.resource;
+	struct pipe_context *pipe = &ctx->base;
+	struct pipe_surface *dst_view, dst_templ;
+	struct pipe_sampler_view src_templ, *src_view;
+
+	/* Initialize the surface. */
+	default_dst_texture(&dst_templ, dst, info->dst.level,
+			info->dst.box.z);
+	dst_templ.format = info->dst.format;
+	dst_view = pipe->create_surface(pipe, dst, &dst_templ);
+
+	/* Initialize the sampler view. */
+	default_src_texture(&src_templ, src, info->src.level);
+	src_templ.format = info->src.format;
+	src_view = pipe->create_sampler_view(pipe, src, &src_templ);
+
+	/* Copy. */
+	util_blitter_blit_generic(ctx->blitter, dst_view, &info->dst.box,
+			src_view, &info->src.box, src->width0, src->height0,
+			info->mask, info->filter,
+			info->scissor_enable ? &info->scissor : NULL,
+			info->alpha_blend);
+
+	pipe_surface_reference(&dst_view, NULL);
+	pipe_sampler_view_reference(&src_view, NULL);
+}