Vulkan: fix discontinuous descriptor set error (#159)

Without this commit, Amber supports descriptors with consecutive
descriptor sets from `[0, N]`, but it does not support discontinuous
descriptor sets e.g., `1, 3, 5`. To support discontinuous
descriptor sets, this commit creates empty descriptor set layouts
and puts them on pipeline layout.

Fixes #158

2 files changed, 153 insertions, 0 deletions

diff --git a/tests/cases/compute_nothing_with_ssbo.amber b/tests/cases/compute_nothing_with_ssbo.amber
new file mode 100644
index 0000000..050cc00
--- /dev/null
+++ b/tests/cases/compute_nothing_with_ssbo.amber
@@ -0,0 +1,37 @@
+# Copyright 2018 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[compute shader]
+#version 430
+
+layout(set = 1, binding = 2) buffer block1 {
+  float data_set1_binding2[11];
+};
+
+void main() {
+}
+
+[test]
+ssbo 1:2 subdata vec4  0 0.1 0.2 0.3 0.4
+compute 4 1 1
+probe ssbo float 1:2 0  ~= 0.1 0.2  0.3  0.4
+
+
+ssbo 1:2 subdata float 0 0.57 0.56 0.55 0.54 \
+                         0.53 0.52 0.51 0.50 \
+                         0.49 0.48 0.47
+compute 4 1 1
+probe ssbo float 1:2 0  ~= 0.57 0.56 0.55 0.54 \
+                           0.53 0.52 0.51 0.50 \
+                           0.49 0.48 0.47
diff --git a/tests/cases/multiple_ssbo_with_sparse_descriptor_set_in_compute_pipeline.amber b/tests/cases/multiple_ssbo_with_sparse_descriptor_set_in_compute_pipeline.amber
new file mode 100644
index 0000000..d5f15cf
--- /dev/null
+++ b/tests/cases/multiple_ssbo_with_sparse_descriptor_set_in_compute_pipeline.amber
@@ -0,0 +1,116 @@
+# Copyright 2018 The Amber Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+[compute shader]
+#version 430
+
+layout(set = 1, binding = 0) buffer block1 {
+  float data_set1_binding0[11];
+  float data_set1_binding0_result[11];
+};
+
+layout(set = 1, binding = 2) buffer block2 {
+  float data_set1_binding2[11];
+  float data_set1_binding2_result[11];
+};
+
+layout(set = 3, binding = 1) buffer block3 {
+  float data_set3_binding1[11];
+  float data_set3_binding1_result[11];
+};
+
+layout(set = 5, binding = 3) buffer block4 {
+  float data_set5_binding3[11];
+  float data_set5_binding3_result[11];
+};
+
+void main() {
+  for (int i = 0; i < 11; ++i) {
+    data_set1_binding0_result[i] = data_set1_binding2[i];
+    data_set1_binding2_result[i] = data_set3_binding1[i];
+    data_set3_binding1_result[i] = data_set5_binding3[i];
+    data_set5_binding3_result[i] = data_set1_binding0[i];
+  }
+}
+
+[test]
+ssbo 1:0 subdata vec4  0 0.1 0.2 0.3 0.4
+ssbo 1:2 subdata vec4  0 0.1 0.2 0.3 0.4
+ssbo 3:1 subdata vec4  0 0.1 0.2 0.3 0.4
+ssbo 5:3 subdata vec4  0 0.1 0.2 0.3 0.4
+
+compute 4 1 1
+
+probe ssbo float 1:0 0  ~= 0.1 0.2  0.3  0.4
+probe ssbo float 1:2 0  ~= 0.1 0.2  0.3  0.4
+probe ssbo float 3:1 0  ~= 0.1 0.2  0.3  0.4
+probe ssbo float 5:3 0  ~= 0.1 0.2  0.3  0.4
+
+ssbo 1:0 subdata float 0 0.1 0.2  0.3  0.4 \
+                         0.5 0.6  0.7  0.8 \
+                         0.9 0.10 0.11     \
+                         0.1 0.2  0.3  0.4 \
+                         0.5 0.6  0.7  0.8 \
+                         0.9 0.10 0.11
+
+ssbo 1:2 subdata float 0 0.57 0.56 0.55 0.54 \
+                         0.53 0.52 0.51 0.50 \
+                         0.49 0.48 0.47      \
+                         0.57 0.56 0.55 0.54 \
+                         0.53 0.52 0.51 0.50 \
+                         0.49 0.48 0.47
+
+ssbo 3:1 subdata float 0 0.21 0.22 0.23 0.24 \
+                         0.25 0.26 0.27 0.28 \
+                         0.29 0.30 0.31      \
+                         0.21 0.22 0.23 0.24 \
+                         0.25 0.26 0.27 0.28 \
+                         0.29 0.30 0.31
+
+ssbo 5:3 subdata float 0 0.23  0.229 0.228 0.227 \
+                         0.226 0.225 0.224 0.223 \
+                         0.222 0.221 0.22        \
+                         0.23  0.229 0.228 0.227 \
+                         0.226 0.225 0.224 0.223 \
+                         0.222 0.221 0.22
+
+compute 4 1 1
+
+probe ssbo float 1:0 0  ~= 0.1 0.2  0.3  0.4 \
+                           0.5 0.6  0.7  0.8 \
+                           0.9 0.10 0.11
+probe ssbo float 1:0 44 ~= 0.57 0.56 0.55 0.54 \
+                           0.53 0.52 0.51 0.50 \
+                           0.49 0.48 0.47
+
+probe ssbo float 1:2 0  ~= 0.57 0.56 0.55 0.54 \
+                           0.53 0.52 0.51 0.50 \
+                           0.49 0.48 0.47
+probe ssbo float 1:2 44 ~= 0.21 0.22 0.23 0.24 \
+                           0.25 0.26 0.27 0.28 \
+                           0.29 0.30 0.31
+
+probe ssbo float 3:1 0  ~= 0.21 0.22 0.23 0.24 \
+                           0.25 0.26 0.27 0.28 \
+                           0.29 0.30 0.31
+probe ssbo float 3:1 44 ~= 0.23  0.229 0.228 0.227 \
+                           0.226 0.225 0.224 0.223 \
+                           0.222 0.221 0.22
+
+probe ssbo float 5:3 0  ~= 0.23  0.229 0.228 0.227 \
+                           0.226 0.225 0.224 0.223 \
+                           0.222 0.221 0.22
+probe ssbo float 5:3 44 ~= 0.1 0.2  0.3  0.4 \
+                           0.5 0.6  0.7  0.8 \
+                           0.9 0.10 0.11