softpipe: add image support to softpipe (v3)

This adds support for ARB_shader_image_load_store to softpipe.

v2: add RESQ support (Ilia)
v3: constify, cleanup internals, add some comments (Brian).

Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_state_image.c b/src/gallium/drivers/softpipe/sp_state_image.c
new file mode 100644
index 00000000000..8909fa26864
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_state_image.c
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2016 Red Hat.
+ *
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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.
+ */
+
+#include "sp_context.h"
+#include "sp_state.h"
+#include "sp_image.h"
+
+static void softpipe_set_shader_images(struct pipe_context *pipe,
+                                       unsigned shader,
+                                       unsigned start,
+                                       unsigned num,
+                                       struct pipe_image_view *images)
+{
+   struct softpipe_context *softpipe = softpipe_context(pipe);
+   unsigned i;
+   assert(shader < PIPE_SHADER_TYPES);
+   assert(start + num <= Elements(softpipe->sampler_views[shader]));
+
+   /* set the new images */
+   for (i = 0; i < num; i++) {
+      int idx = start + i;
+
+      if (images) {
+         pipe_resource_reference(&softpipe->tgsi.image[shader]->sp_iview[idx].resource, images[i].resource);
+         softpipe->tgsi.image[shader]->sp_iview[idx] = images[i];
+      }
+      else {
+         pipe_resource_reference(&softpipe->tgsi.image[shader]->sp_iview[idx].resource, NULL);
+         memset(&softpipe->tgsi.image[shader]->sp_iview[idx], 0, sizeof(struct pipe_image_view));
+      }
+   }
+}
+
+void softpipe_init_image_funcs(struct pipe_context *pipe)
+{
+   pipe->set_shader_images = softpipe_set_shader_images;
+}