Merge commit '8797ee109e7a6ea4d1f58f387f757545fa35325b' into master

Bug: b/201652781
Change-Id: Ibb8fbe9137d18fa6f6109ad5f51ec8e7c5f9cfbb

35 files changed, 1237 insertions, 117 deletions

diff --git a/docs/amber_script.md b/docs/amber_script.md
index 57e0632..295cdc7 100644
--- a/docs/amber_script.md
+++ b/docs/amber_script.md
@@ -485,6 +485,12 @@ The following commands are all specified within the `PIPELINE` command.
 ```
 
 ```groovy
+  # Set the viewport size. If no viewport is provided then it defaults to the
+  # whole framebuffer size. Depth range defaults to 0 to 1.
+  VIEWPORT {x} {y} SIZE {width} {height} [MIN_DEPTH {mind}] [MAX_DEPTH {maxd}]
+```
+
+```groovy
   # Set subgroup size control setting. Require that subgroups must be launched
   # with all invocations active for given shader. Allow SubgroupSize to vary
   # for given shader. Require a specific SubgroupSize the for given shader.
@@ -494,7 +500,7 @@ The following commands are all specified within the `PIPELINE` command.
   #    and be less than or equal to maxSubgroupSize
   # - MIN to set the required subgroup size to the minSubgroupSize
   # - MAX to set the required subgroup size to the maxSubgroupSize
-  SUBROUP {name_of_shader}
+  SUBGROUP {name_of_shader}
     FULLY_POPULATED {fully_populated_enable}
     VARYING_SIZE {varying_size_enable}
     REQUIRED_SIZE {subgroup_size}
@@ -559,13 +565,18 @@ All BIND BUFFER and BIND SAMPLER commands below define a descriptor set and bind
 These commands can be replaced with BIND BUFFER_ARRAY and BIND SAMPLER_ARRAY commands.
 In these cases multiple buffer or sampler names need to be provided, separated by spaces.
 This creates a descriptor array of buffers or samplers bound to the same descriptor set
-and binding ID. An array of offsets should be provided via `OFFSET offset1 offset2 ...`
-when using dynamic buffers with BUFFER_ARRAY.
+and binding ID. An array of dynamic offsets should be provided via `OFFSET offset1 offset2 ...`
+when using dynamic buffers with BUFFER_ARRAY. Optional descriptor binding offset(s) and range(s)
+can be defined via `DESCRIPTOR_OFFSET offset1 offset2 ...` and 
+`DESCRIPTOR_RANGE range1 range2 ...` when using uniform or storage buffers. Offsets and 
+ranges can be used also with dynamic buffers.
 ```groovy
   # Bind the buffer of the given |buffer_type| at the given descriptor set
-  # and binding. The buffer will use a start index of 0.
+  # and binding. The buffer will use a byte offset |descriptor_offset| 
+  # with range |range|.
   BIND {BUFFER | BUFFER_ARRAY} {buffer_name} AS {buffer_type} DESCRIPTOR_SET _id_ \
-       BINDING _id_
+       BINDING _id_ [ DESCRIPTOR_OFFSET _descriptor_offset_ (default 0) ] \ 
+       [ DESCRIPTOR_RANGE _range_ (default -1 == VK_WHOLE_SIZE) ]
 
   # Attach |buffer_name| as a storage image. The MIP level will have a base
   # value of |level|.
@@ -586,9 +597,12 @@ when using dynamic buffers with BUFFER_ARRAY.
   BIND {SAMPLER | SAMPLER_ARRAY} {sampler_name} DESCRIPTOR_SET _id_ BINDING _id_
 
   # Bind |buffer_name| as dynamic uniform/storage buffer at the given descriptor set
-  # and binding. The buffer will use a start index of |offset|.
+  # and binding. The buffer will use a byte offset |offset| + |descriptor_offset|
+  # with range |range|.
   BIND {BUFFER | BUFFER_ARRAY} {buffer_name} AS {uniform_dynamic | storage_dynamic} \
-       DESCRIPTOR_SET _id_ BINDING _id_ OFFSET _offset_
+       DESCRIPTOR_SET _id_ BINDING _id_ OFFSET _offset_ \
+       [ DESCRIPTOR_OFFSET _descriptor_offset_ (default 0) ] \ 
+       [ DESCRIPTOR_RANGE _range_ (default -1 == VK_WHOLE_SIZE) ]
 ```
 
 ```groovy
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 00e3e54..901681f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -159,6 +159,7 @@ if (${AMBER_ENABLE_TESTS})
     amberscript/parser_struct_test.cc
     amberscript/parser_subgroup_size_control_test.cc
     amberscript/parser_test.cc
+    amberscript/parser_viewport_test.cc
     buffer_test.cc
     command_data_test.cc
     descriptor_set_and_binding_parser_test.cc
diff --git a/src/amberscript/parser.cc b/src/amberscript/parser.cc
index 50760f0..809baa1 100644
--- a/src/amberscript/parser.cc
+++ b/src/amberscript/parser.cc
@@ -602,6 +602,8 @@ Result Parser::ParsePipelineBody(const std::string& cmd_name,
       r = ParsePipelineShaderOptimizations(pipeline.get());
     } else if (tok == "FRAMEBUFFER_SIZE") {
       r = ParsePipelineFramebufferSize(pipeline.get());
+    } else if (tok == "VIEWPORT") {
+      r = ParsePipelineViewport(pipeline.get());
     } else if (tok == "BIND") {
       r = ParsePipelineBind(pipeline.get());
     } else if (tok == "VERTEX_DATA") {
@@ -949,6 +951,75 @@ Result Parser::ParsePipelineFramebufferSize(Pipeline* pipeline) {
   return ValidateEndOfStatement("FRAMEBUFFER_SIZE command");
 }
 
+Result Parser::ParsePipelineViewport(Pipeline* pipeline) {
+  Viewport vp;
+  vp.mind = 0.0f;
+  vp.maxd = 1.0f;
+
+  float val[2];
+  for (int i = 0; i < 2; i++) {
+    auto token = tokenizer_->NextToken();
+    if (token->IsEOL() || token->IsEOS())
+      return Result("missing offset for VIEWPORT command");
+    Result r = token->ConvertToDouble();
+    if (!r.IsSuccess())
+      return Result("invalid offset for VIEWPORT command");
+
+    val[i] = token->AsFloat();
+  }
+  vp.x = val[0];
+  vp.y = val[1];
+
+  auto token = tokenizer_->NextToken();
+  if (!token->IsIdentifier() || token->AsString() != "SIZE")
+    return Result("missing SIZE for VIEWPORT command");
+
+  for (int i = 0; i < 2; i++) {
+    token = tokenizer_->NextToken();
+    if (token->IsEOL() || token->IsEOS())
+      return Result("missing size for VIEWPORT command");
+    Result r = token->ConvertToDouble();
+    if (!r.IsSuccess())
+      return Result("invalid size for VIEWPORT command");
+
+    val[i] = token->AsFloat();
+  }
+  vp.w = val[0];
+  vp.h = val[1];
+
+  token = tokenizer_->PeekNextToken();
+  while (token->IsIdentifier()) {
+    if (token->AsString() == "MIN_DEPTH") {
+      tokenizer_->NextToken();
+      token = tokenizer_->NextToken();
+      if (token->IsEOL() || token->IsEOS())
+        return Result("missing min_depth for VIEWPORT command");
+      Result r = token->ConvertToDouble();
+      if (!r.IsSuccess())
+        return Result("invalid min_depth for VIEWPORT command");
+
+      vp.mind = token->AsFloat();
+    }
+    if (token->AsString() == "MAX_DEPTH") {
+      tokenizer_->NextToken();
+      token = tokenizer_->NextToken();
+      if (token->IsEOL() || token->IsEOS())
+        return Result("missing max_depth for VIEWPORT command");
+      Result r = token->ConvertToDouble();
+      if (!r.IsSuccess())
+        return Result("invalid max_depth for VIEWPORT command");
+
+      vp.maxd = token->AsFloat();
+    }
+
+    token = tokenizer_->PeekNextToken();
+  }
+
+  pipeline->GetPipelineData()->SetViewport(vp);
+
+  return ValidateEndOfStatement("VIEWPORT command");
+}
+
 Result Parser::ToBufferType(const std::string& name, BufferType* type) {
   assert(type);
   if (name == "color")
@@ -1172,10 +1243,60 @@ Result Parser::ParsePipelineBind(Pipeline* pipeline) {
           }
         }
 
+        // Set default descriptor buffer offsets to 0 and descriptor buffer
+        // ranges to VK_WHOLE_SIZE (~0ULL).
+        std::vector<uint64_t> descriptor_offsets(buffers.size(), 0);
+        std::vector<uint64_t> descriptor_ranges(buffers.size(), ~0ULL);
+        if (buffer_type == BufferType::kUniformDynamic ||
+            buffer_type == BufferType::kStorageDynamic ||
+            buffer_type == BufferType::kStorage ||
+            buffer_type == BufferType::kUniform) {
+          token = tokenizer_->PeekNextToken();
+          if (token->IsIdentifier() &&
+              token->AsString() == "DESCRIPTOR_OFFSET") {
+            token = tokenizer_->NextToken();
+            for (size_t i = 0; i < buffers.size(); i++) {
+              token = tokenizer_->NextToken();
+              if (!token->IsInteger()) {
+                if (i > 0) {
+                  return Result(
+                      "expecting a DESCRIPTOR_OFFSET value for each buffer in "
+                      "the array");
+                } else {
+                  return Result(
+                      "expecting an integer value for DESCRIPTOR_OFFSET");
+                }
+              }
+              descriptor_offsets[i] = token->AsUint64();
+            }
+          }
+
+          token = tokenizer_->PeekNextToken();
+          if (token->IsIdentifier() &&
+              token->AsString() == "DESCRIPTOR_RANGE") {
+            token = tokenizer_->NextToken();
+            for (size_t i = 0; i < buffers.size(); i++) {
+              token = tokenizer_->NextToken();
+              if (!token->IsInteger()) {
+                if (i > 0) {
+                  return Result(
+                      "expecting a DESCRIPTOR_RANGE value for each buffer in "
+                      "the array");
+                } else {
+                  return Result(
+                      "expecting an integer value for DESCRIPTOR_RANGE");
+                }
+              }
+              descriptor_ranges[i] = token->AsUint64();
+            }
+          }
+        }
+
         pipeline->ClearBuffers(descriptor_set, binding);
         for (size_t i = 0; i < buffers.size(); i++) {
           pipeline->AddBuffer(buffers[i], buffer_type, descriptor_set, binding,
-                              base_mip_level, dynamic_offsets[i]);
+                              base_mip_level, dynamic_offsets[i],
+                              descriptor_offsets[i], descriptor_ranges[i]);
         }
       } else if (token->IsIdentifier() && token->AsString() == "KERNEL") {
         token = tokenizer_->NextToken();
diff --git a/src/amberscript/parser.h b/src/amberscript/parser.h
index e8cb835..6fb25ce 100644
--- a/src/amberscript/parser.h
+++ b/src/amberscript/parser.h
@@ -65,6 +65,7 @@ class Parser : public amber::Parser {
   Result ParsePipelineShaderCompileOptions(Pipeline*);
   Result ParsePipelineSubgroup(Pipeline* pipeline);
   Result ParsePipelineFramebufferSize(Pipeline*);
+  Result ParsePipelineViewport(Pipeline*);
   Result ParsePipelineBind(Pipeline*);
   Result ParsePipelineVertexData(Pipeline*);
   Result ParsePipelineIndexData(Pipeline*);
diff --git a/src/amberscript/parser_bind_test.cc b/src/amberscript/parser_bind_test.cc
index 64f3948..a39b69e 100644
--- a/src/amberscript/parser_bind_test.cc
+++ b/src/amberscript/parser_bind_test.cc
@@ -1393,11 +1393,53 @@ END
   EXPECT_EQ(BufferType::kUniform, bufs[0].type);
   EXPECT_EQ(1U, bufs[0].descriptor_set);
   EXPECT_EQ(2U, bufs[0].binding);
+  EXPECT_EQ(0U, bufs[0].descriptor_offset);
+  EXPECT_EQ(~0ULL, bufs[0].descriptor_range);
   EXPECT_EQ(static_cast<uint32_t>(0), bufs[0].location);
   EXPECT_EQ(FormatType::kR32G32B32A32_SFLOAT,
             bufs[0].buffer->GetFormat()->GetFormatType());
 }
 
+TEST_F(AmberScriptParserTest, BindBufferDescriptorOffsetAndRange) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_OFFSET 256 DESCRIPTOR_RANGE 512
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 3 DESCRIPTOR_OFFSET 256 DESCRIPTOR_RANGE -1
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  const auto* pipeline = pipelines[0].get();
+  const auto& bufs = pipeline->GetBuffers();
+  ASSERT_EQ(2U, bufs.size());
+  EXPECT_EQ(BufferType::kUniform, bufs[0].type);
+  EXPECT_EQ(1U, bufs[0].descriptor_set);
+  EXPECT_EQ(2U, bufs[0].binding);
+  EXPECT_EQ(256U, bufs[0].descriptor_offset);
+  EXPECT_EQ(512U, bufs[0].descriptor_range);
+  EXPECT_EQ(static_cast<uint32_t>(0), bufs[0].location);
+  EXPECT_EQ(FormatType::kR32G32B32A32_SFLOAT,
+            bufs[0].buffer->GetFormat()->GetFormatType());
+  // Verify the descriptor range from the second buffer.
+  EXPECT_EQ(~0ULL, bufs[1].descriptor_range);
+}
+
 TEST_F(AmberScriptParserTest, BindBufferMissingBindingValue) {
   std::string in = R"(
 SHADER vertex my_shader PASSTHROUGH
@@ -2859,6 +2901,33 @@ END)";
   EXPECT_EQ("13: missing BINDING for BIND command", r.Error());
 }
 
+TEST_F(AmberScriptParserTest, BindDescriptorOffsetWithUnsupportedBufferType) {
+  std::string unsupported_buffer_types[] = {"uniform_texel_buffer",
+                                            "storage_texel_buffer",
+                                            "sampled_image", "storage_image"};
+
+  for (const auto& buffer_type : unsupported_buffer_types) {
+    std::ostringstream in;
+    in << R"(
+SHADER compute compute_shader GLSL
+# GLSL Shader
+END
+
+BUFFER texture FORMAT R8G8B8A8_UNORM
+
+PIPELINE compute pipeline
+  ATTACH compute_shader
+  BIND BUFFER texture AS )"
+       << buffer_type << R"( DESCRIPTOR_SET 0 BINDING 0 DESCRIPTOR_OFFSET 0
+END)";
+    Parser parser;
+    Result r = parser.Parse(in.str());
+    ASSERT_FALSE(r.IsSuccess());
+    EXPECT_EQ("10: extra parameters after BIND command: DESCRIPTOR_OFFSET",
+              r.Error());
+  }
+}
+
 TEST_F(AmberScriptParserTest, BindBufferArray) {
   std::string in = R"(
 SHADER vertex my_shader PASSTHROUGH
@@ -2891,12 +2960,200 @@ END
     EXPECT_EQ(BufferType::kUniform, bufs[i].type);
     EXPECT_EQ(1U, bufs[i].descriptor_set);
     EXPECT_EQ(2U, bufs[i].binding);
+    EXPECT_EQ(0U, bufs[i].descriptor_offset);
+    EXPECT_EQ(~0ULL, bufs[i].descriptor_range);
+    EXPECT_EQ(static_cast<uint32_t>(0), bufs[i].location);
+    EXPECT_EQ(FormatType::kR32G32B32A32_SFLOAT,
+              bufs[i].buffer->GetFormat()->GetFormatType());
+  }
+}
+
+TEST_F(AmberScriptParserTest, BindBufferArrayWithDescriptorOffsetAndRange) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_buf1 FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+
+  BIND BUFFER_ARRAY my_buf1 my_buf1 AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_OFFSET 256 512 DESCRIPTOR_RANGE 1024 2048
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  const auto* pipeline = pipelines[0].get();
+  const auto& bufs = pipeline->GetBuffers();
+  ASSERT_EQ(2U, bufs.size());
+  for (size_t i = 0; i < 2; i++) {
+    EXPECT_EQ(BufferType::kUniform, bufs[i].type);
+    EXPECT_EQ(1U, bufs[i].descriptor_set);
+    EXPECT_EQ(2U, bufs[i].binding);
+    EXPECT_EQ(256U * (i + 1), bufs[i].descriptor_offset);
+    EXPECT_EQ(1024U * (i + 1), bufs[i].descriptor_range);
     EXPECT_EQ(static_cast<uint32_t>(0), bufs[i].location);
     EXPECT_EQ(FormatType::kR32G32B32A32_SFLOAT,
               bufs[i].buffer->GetFormat()->GetFormatType());
   }
 }
 
+TEST_F(AmberScriptParserTest,
+       BindDynamicBufferArrayWithDescriptorOffsetAndRange) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_buf1 FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+
+  BIND BUFFER_ARRAY my_buf1 my_buf1 AS uniform_dynamic DESCRIPTOR_SET 1 BINDING 2 OFFSET 16 32 DESCRIPTOR_OFFSET 256 512 DESCRIPTOR_RANGE 1024 2048
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  const auto* pipeline = pipelines[0].get();
+  const auto& bufs = pipeline->GetBuffers();
+  ASSERT_EQ(2U, bufs.size());
+  for (size_t i = 0; i < 2; i++) {
+    EXPECT_EQ(BufferType::kUniformDynamic, bufs[i].type);
+    EXPECT_EQ(1U, bufs[i].descriptor_set);
+    EXPECT_EQ(2U, bufs[i].binding);
+    EXPECT_EQ(16U * (i + 1), bufs[i].dynamic_offset);
+    EXPECT_EQ(256U * (i + 1), bufs[i].descriptor_offset);
+    EXPECT_EQ(1024U * (i + 1), bufs[i].descriptor_range);
+    EXPECT_EQ(static_cast<uint32_t>(0), bufs[i].location);
+    EXPECT_EQ(FormatType::kR32G32B32A32_SFLOAT,
+              bufs[i].buffer->GetFormat()->GetFormatType());
+  }
+}
+
+TEST_F(AmberScriptParserTest, BindBufferArrayOnlyOneDescriptorOffset) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+
+  BIND BUFFER_ARRAY my_buf my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_OFFSET 256
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ(
+      "13: expecting a DESCRIPTOR_OFFSET value for each buffer in the array",
+      r.Error());
+}
+
+TEST_F(AmberScriptParserTest, BindBufferArrayOnlyOneDescriptorRange) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+
+  BIND BUFFER_ARRAY my_buf my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_RANGE 256
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ(
+      "13: expecting a DESCRIPTOR_RANGE value for each buffer in the array",
+      r.Error());
+}
+
+TEST_F(AmberScriptParserTest, BindUniformBufferEmptyDescriptorOffset) {
+  std::string in = R"(
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+PIPELINE graphics my_pipeline
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_OFFSET
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ("5: expecting an integer value for DESCRIPTOR_OFFSET", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, BindUniformBufferInvalidDescriptorOffset) {
+  std::string in = R"(
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+PIPELINE graphics my_pipeline
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_OFFSET foo
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ("4: expecting an integer value for DESCRIPTOR_OFFSET", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, BindUniformBufferEmptyDescriptorRange) {
+  std::string in = R"(
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+PIPELINE graphics my_pipeline
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_RANGE
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ("5: expecting an integer value for DESCRIPTOR_RANGE", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, BindUniformBufferInvalidDescriptorRange) {
+  std::string in = R"(
+BUFFER my_buf FORMAT R32G32B32A32_SFLOAT
+PIPELINE graphics my_pipeline
+  BIND BUFFER my_buf AS uniform DESCRIPTOR_SET 1 BINDING 2 DESCRIPTOR_RANGE foo
+END
+)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess());
+  EXPECT_EQ("4: expecting an integer value for DESCRIPTOR_RANGE", r.Error());
+}
+
 TEST_F(AmberScriptParserTest, BindBufferArrayOnlyOneBuffer) {
   std::string in = R"(
 SHADER vertex my_shader PASSTHROUGH
diff --git a/src/amberscript/parser_viewport_test.cc b/src/amberscript/parser_viewport_test.cc
new file mode 100644
index 0000000..ec19fb2
--- /dev/null
+++ b/src/amberscript/parser_viewport_test.cc
@@ -0,0 +1,388 @@
+// Copyright 2021 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
+//
+//     http://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 parseried.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "gtest/gtest.h"
+#include "src/amberscript/parser.h"
+
+namespace amber {
+namespace amberscript {
+
+using AmberScriptParserTest = testing::Test;
+
+TEST_F(AmberScriptParserTest, NoViewport) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_FALSE(pipeline->GetPipelineData()->HasViewportData());
+}
+
+TEST_F(AmberScriptParserTest, ViewportNoDepth) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 5.0 7.0 SIZE 10.0 12.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(5.0f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(7.0f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(10.0f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(12.0f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(0.0f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(1.0f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportMinDepth) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 12.2 9.7 SIZE 0.5 106.1 MIN_DEPTH 0.3
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(12.2f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(9.7f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(0.5f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(106.1f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(0.3f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(1.0f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportMaxDepth) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 12.2 9.7 SIZE 0.5 106.1 MAX_DEPTH 0.456
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(12.2f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(9.7f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(0.5f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(106.1f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(0.0f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(0.456f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportAllValues) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT -0.6 5.2 SIZE 13.8 9.4 MIN_DEPTH 0.5 MAX_DEPTH 0.6
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(-0.6f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(5.2f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(13.8f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(9.4f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(0.5f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(0.6f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportIntegers) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT -2 7 SIZE 15 20 MIN_DEPTH 1 MAX_DEPTH 2
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(-2.0f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(7.0f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(15.0f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(20.0f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(1.0f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(2.0f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportMixedIntegers) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT -2 13.1 SIZE 15.9 20
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_TRUE(r.IsSuccess()) << r.Error();
+
+  auto script = parser.GetScript();
+  const auto& pipelines = script->GetPipelines();
+  ASSERT_EQ(1U, pipelines.size());
+
+  auto* pipeline = pipelines[0].get();
+  ASSERT_TRUE(pipeline->GetPipelineData()->HasViewportData());
+  ASSERT_FLOAT_EQ(-2.0f, pipeline->GetPipelineData()->GetViewport().x);
+  ASSERT_FLOAT_EQ(13.1f, pipeline->GetPipelineData()->GetViewport().y);
+  ASSERT_FLOAT_EQ(15.9f, pipeline->GetPipelineData()->GetViewport().w);
+  ASSERT_FLOAT_EQ(20.0f, pipeline->GetPipelineData()->GetViewport().h);
+  ASSERT_FLOAT_EQ(0.0f, pipeline->GetPipelineData()->GetViewport().mind);
+  ASSERT_FLOAT_EQ(1.0f, pipeline->GetPipelineData()->GetViewport().maxd);
+}
+
+TEST_F(AmberScriptParserTest, ViewportInvalidMissingSize) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 0.0 2.0 12.0 24.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("15: missing SIZE for VIEWPORT command", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, ViewportInvalidSizeNotOptional) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 0.0 2.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("16: missing SIZE for VIEWPORT command", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, ViewportInvalidMissingOffset) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 0.0 SIZE 12.0 24.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("15: invalid offset for VIEWPORT command", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, ViewportInvalidMissingSizeValue) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 0.0 2.0 SIZE 12.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("16: missing size for VIEWPORT command", r.Error());
+}
+
+TEST_F(AmberScriptParserTest, ViewportInvalidMissingDepthValue) {
+  std::string in = R"(
+SHADER vertex my_shader PASSTHROUGH
+SHADER fragment my_fragment GLSL
+# GLSL Shader
+END
+BUFFER my_fb FORMAT R32G32B32A32_SFLOAT
+BUFFER my_ds FORMAT D32_SFLOAT_S8_UINT
+
+PIPELINE graphics my_pipeline
+  ATTACH my_shader
+  ATTACH my_fragment
+  BIND BUFFER my_fb AS color LOCATION 0
+  BIND BUFFER my_ds AS depth_stencil
+
+  VIEWPORT 0.0 2.0 SIZE 12.0 24.0 MIN_DEPTH MAX_DEPTH 1.0
+END)";
+
+  Parser parser;
+  Result r = parser.Parse(in);
+  ASSERT_FALSE(r.IsSuccess()) << r.Error();
+  EXPECT_EQ("15: invalid min_depth for VIEWPORT command", r.Error());
+}
+
+}  // namespace amberscript
+}  // namespace amber
diff --git a/src/command.h b/src/command.h
index 207c336..26b9dc2 100644
--- a/src/command.h
+++ b/src/command.h
@@ -546,6 +546,16 @@ class BufferCommand : public BindableResourceCommand {
   }
   uint32_t GetDynamicOffset() const { return dynamic_offset_; }
 
+  void SetDescriptorOffset(uint64_t descriptor_offset) {
+    descriptor_offset_ = descriptor_offset;
+  }
+  uint64_t GetDescriptorOffset() const { return descriptor_offset_; }
+
+  void SetDescriptorRange(uint64_t descriptor_range) {
+    descriptor_range_ = descriptor_range;
+  }
+  uint64_t GetDescriptorRange() const { return descriptor_range_; }
+
   void SetValues(std::vector<Value>&& values) { values_ = std::move(values); }
   const std::vector<Value>& GetValues() const { return values_; }
 
@@ -565,6 +575,8 @@ class BufferCommand : public BindableResourceCommand {
   uint32_t offset_ = 0;
   uint32_t base_mip_level_ = 0;
   uint32_t dynamic_offset_ = 0;
+  uint64_t descriptor_offset_ = 0;
+  uint64_t descriptor_range_ = ~0ULL;
   std::vector<Value> values_;
 };
 
diff --git a/src/float16_helper.cc b/src/float16_helper.cc
index 617bd72..5cb35e7 100644
--- a/src/float16_helper.cc
+++ b/src/float16_helper.cc
@@ -15,6 +15,7 @@
 #include "src/float16_helper.h"
 
 #include <cassert>
+#include <cstring>
 
 // Float10
 // | 9 8 7 6 5 | 4 3 2 1 0 |
@@ -75,8 +76,11 @@ float HexFloat16ToFloat(const uint8_t* value) {
   }
 
   uint32_t hex = sign | exponent | mantissa;
-  float* hex_float = reinterpret_cast<float*>(&hex);
-  return *hex_float;
+  float hex_float;
+  static_assert((sizeof(uint32_t) == sizeof(float)),
+                "sizeof(uint32_t) != sizeof(float)");
+  memcpy(&hex_float, &hex, sizeof(float));
+  return hex_float;
 }
 
 // Convert float |value| whose size is 11 bits to 32 bits float
@@ -89,8 +93,11 @@ float HexFloat11ToFloat(const uint8_t* value) {
   uint32_t mantissa = (static_cast<uint32_t>(value[0]) & 0x3f) << 17U;
 
   uint32_t hex = exponent | mantissa;
-  float* hex_float = reinterpret_cast<float*>(&hex);
-  return *hex_float;
+  float hex_float;
+  static_assert((sizeof(uint32_t) == sizeof(float)),
+                "sizeof(uint32_t) != sizeof(float)");
+  memcpy(&hex_float, &hex, sizeof(float));
+  return hex_float;
 }
 
 // Convert float |value| whose size is 10 bits to 32 bits float
@@ -103,8 +110,11 @@ float HexFloat10ToFloat(const uint8_t* value) {
   uint32_t mantissa = (static_cast<uint32_t>(value[0]) & 0x1f) << 18U;
 
   uint32_t hex = exponent | mantissa;
-  float* hex_float = reinterpret_cast<float*>(&hex);
-  return *hex_float;
+  float hex_float;
+  static_assert((sizeof(uint32_t) == sizeof(float)),
+                "sizeof(uint32_t) != sizeof(float)");
+  memcpy(&hex_float, &hex, sizeof(float));
+  return hex_float;
 }
 
 }  // namespace
diff --git a/src/pipeline.cc b/src/pipeline.cc
index 55c6bae..9b73041 100644
--- a/src/pipeline.cc
+++ b/src/pipeline.cc
@@ -516,7 +516,9 @@ void Pipeline::AddBuffer(Buffer* buf,
                          uint32_t descriptor_set,
                          uint32_t binding,
                          uint32_t base_mip_level,
-                         uint32_t dynamic_offset) {
+                         uint32_t dynamic_offset,
+                         uint64_t descriptor_offset,
+                         uint64_t descriptor_range) {
   buffers_.push_back(BufferInfo{buf});
 
   auto& info = buffers_.back();
@@ -526,6 +528,8 @@ void Pipeline::AddBuffer(Buffer* buf,
   info.base_mip_level = base_mip_level;
   info.dynamic_offset = dynamic_offset;
   info.sampler = buf->GetSampler();
+  info.descriptor_offset = descriptor_offset;
+  info.descriptor_range = descriptor_range;
 }
 
 void Pipeline::AddBuffer(Buffer* buf,
@@ -862,7 +866,7 @@ Result Pipeline::GenerateOpenCLPodBuffers() {
         opencl_pod_buffer_map_.insert(
             buf_iter,
             std::make_pair(std::make_pair(descriptor_set, binding), buffer));
-        AddBuffer(buffer, buffer_type, descriptor_set, binding, 0, 0);
+        AddBuffer(buffer, buffer_type, descriptor_set, binding, 0, 0, 0, ~0ULL);
       } else {
         buffer = buf_iter->second;
       }
diff --git a/src/pipeline.h b/src/pipeline.h
index ec38a3a..7a80ad4 100644
--- a/src/pipeline.h
+++ b/src/pipeline.h
@@ -203,6 +203,8 @@ class Pipeline {
     uint32_t offset = 0;
     uint32_t stride = 0;
     Sampler* sampler = nullptr;
+    uint64_t descriptor_offset = 0;
+    uint64_t descriptor_range = ~0ULL;  // ~0ULL == VK_WHOLE_SIZE
   };
 
   /// Information on a sampler attached to the pipeline.
@@ -335,13 +337,16 @@ class Pipeline {
   Buffer* GetIndexBuffer() const { return index_buffer_; }
 
   /// Adds |buf| of |type| to the pipeline at the given |descriptor_set|,
-  /// |binding|, |base_mip_level|, and |dynamic_offset|.
+  /// |binding|, |base_mip_level|, |descriptor_offset|, |descriptor_range| and
+  /// |dynamic_offset|.
   void AddBuffer(Buffer* buf,
                  BufferType type,
                  uint32_t descriptor_set,
                  uint32_t binding,
                  uint32_t base_mip_level,
-                 uint32_t dynamic_offset);
+                 uint32_t dynamic_offset,
+                 uint64_t descriptor_offset,
+                 uint64_t descriptor_range);
   /// Adds |buf| to the pipeline at the given |arg_name|.
   void AddBuffer(Buffer* buf, BufferType type, const std::string& arg_name);
   /// Adds |buf| to the pipeline at the given |arg_no|.
diff --git a/src/pipeline_data.h b/src/pipeline_data.h
index dc67c03..9a3b4d1 100644
--- a/src/pipeline_data.h
+++ b/src/pipeline_data.h
@@ -21,6 +21,15 @@
 
 namespace amber {
 
+struct Viewport {
+  float x;
+  float y;
+  float w;
+  float h;
+  float mind;
+  float maxd;
+};
+
 /// Stores information used to configure a pipeline.
 class PipelineData {
  public:
@@ -161,6 +170,14 @@ class PipelineData {
   void SetAlphaBlendOp(BlendOp op) { alpha_blend_op_ = op; }
   BlendOp GetAlphaBlendOp() const { return alpha_blend_op_; }
 
+  void SetViewport(const Viewport& v) {
+    has_viewport_data = true;
+    vp = v;
+  }
+
+  bool HasViewportData() const { return has_viewport_data; }
+  const Viewport& GetViewport() const { return vp; }
+
  private:
   StencilOp front_fail_op_ = StencilOp::kKeep;
   StencilOp front_pass_op_ = StencilOp::kKeep;
@@ -213,6 +230,9 @@ class PipelineData {
   float depth_bias_slope_factor_ = 0.0f;
   float min_depth_bounds_ = 0.0f;
   float max_depth_bounds_ = 0.0f;
+
+  bool has_viewport_data = false;
+  Viewport vp;
 };
 
 }  // namespace amber
diff --git a/src/pipeline_test.cc b/src/pipeline_test.cc
index e16313c..c0d2f67 100644
--- a/src/pipeline_test.cc
+++ b/src/pipeline_test.cc
@@ -262,7 +262,7 @@ TEST_F(PipelineTest, PipelineBufferWithoutFormat) {
 
   auto buf = MakeUnique<Buffer>();
   buf->SetName("MyBuffer");
-  p.AddBuffer(buf.get(), BufferType::kStorage, 0, 0, 0, 0);
+  p.AddBuffer(buf.get(), BufferType::kStorage, 0, 0, 0, 0, 0, 0);
 
   Result r = p.Validate();
   EXPECT_FALSE(r.IsSuccess()) << r.Error();
@@ -365,11 +365,11 @@ TEST_F(PipelineTest, Clone) {
 
   auto buf1 = MakeUnique<Buffer>();
   buf1->SetName("buf1");
-  p.AddBuffer(buf1.get(), BufferType::kStorage, 1, 1, 0, 0);
+  p.AddBuffer(buf1.get(), BufferType::kStorage, 1, 1, 0, 0, 0, 0);
 
   auto buf2 = MakeUnique<Buffer>();
   buf2->SetName("buf2");
-  p.AddBuffer(buf2.get(), BufferType::kStorage, 1, 2, 0, 16);
+  p.AddBuffer(buf2.get(), BufferType::kStorage, 1, 2, 0, 16, 256, 512);
 
   auto clone = p.Clone();
   EXPECT_EQ("", clone->GetName());
@@ -400,11 +400,15 @@ TEST_F(PipelineTest, Clone) {
   EXPECT_EQ(1U, bufs[0].descriptor_set);
   EXPECT_EQ(1U, bufs[0].binding);
   EXPECT_EQ(0U, bufs[0].dynamic_offset);
+  EXPECT_EQ(0U, bufs[0].descriptor_offset);
+  EXPECT_EQ(0U, bufs[0].descriptor_range);
 
   EXPECT_EQ("buf2", bufs[1].buffer->GetName());
   EXPECT_EQ(1U, bufs[1].descriptor_set);
   EXPECT_EQ(2U, bufs[1].binding);
   EXPECT_EQ(16U, bufs[1].dynamic_offset);
+  EXPECT_EQ(256U, bufs[1].descriptor_offset);
+  EXPECT_EQ(512U, bufs[1].descriptor_range);
 }
 
 TEST_F(PipelineTest, OpenCLUpdateBindings) {
diff --git a/src/vkscript/command_parser.cc b/src/vkscript/command_parser.cc
index 0953344..610c7e6 100644
--- a/src/vkscript/command_parser.cc
+++ b/src/vkscript/command_parser.cc
@@ -577,7 +577,8 @@ Result CommandParser::ProcessSSBO() {
       buffer = b.get();
       script_->AddBuffer(std::move(b));
       pipeline_->ClearBuffers(set, binding);
-      pipeline_->AddBuffer(buffer, BufferType::kStorage, set, binding, 0, 0);
+      pipeline_->AddBuffer(buffer, BufferType::kStorage, set, binding, 0, 0, 0,
+                           ~0ULL);
     }
     cmd->SetBuffer(buffer);
   }
@@ -729,7 +730,8 @@ Result CommandParser::ProcessUniform() {
       buffer = b.get();
       script_->AddBuffer(std::move(b));
       pipeline_->ClearBuffers(set, binding);
-      pipeline_->AddBuffer(buffer, BufferType::kUniform, set, binding, 0, 0);
+      pipeline_->AddBuffer(buffer, BufferType::kUniform, set, binding, 0, 0, 0,
+                           ~0ULL);
     }
     cmd->SetBuffer(buffer);
 
diff --git a/src/vulkan/buffer_backed_descriptor.cc b/src/vulkan/buffer_backed_descriptor.cc
index 2f7aa98..d1b1aed 100644
--- a/src/vulkan/buffer_backed_descriptor.cc
+++ b/src/vulkan/buffer_backed_descriptor.cc
@@ -35,26 +35,18 @@ BufferBackedDescriptor::~BufferBackedDescriptor() = default;
 
 Result BufferBackedDescriptor::RecordCopyDataToResourceIfNeeded(
     CommandBuffer* command) {
-  auto resources = GetResources();
-  auto buffers = GetAmberBuffers();
-  if (resources.size() != buffers.size())
-    return Result(
-        "Vulkan: BufferBackedDescriptor::RecordCopyDataToResourceIfNeeded() "
-        "resource and buffer vector sizes are not matching");
-
-  for (size_t i = 0; i < resources.size(); i++) {
-    if (!buffers[i]->ValuePtr()->empty()) {
-      resources[i]->UpdateMemoryWithRawData(*buffers[i]->ValuePtr());
+  for (const auto& resource : GetResources()) {
+    if (!resource.first->ValuePtr()->empty()) {
+      resource.second->UpdateMemoryWithRawData(*resource.first->ValuePtr());
       // If the resource is read-only, keep the buffer data; Amber won't copy
       // read-only resources back into the host buffers, so it makes sense to
       // leave the buffer intact.
       if (!IsReadOnly())
-        buffers[i]->ValuePtr()->clear();
+        resource.first->ValuePtr()->clear();
     }
 
-    resources[i]->CopyToDevice(command);
+    resource.second->CopyToDevice(command);
   }
-
   return {};
 }
 
@@ -67,7 +59,7 @@ Result BufferBackedDescriptor::RecordCopyDataToHost(CommandBuffer* command) {
     }
 
     for (const auto& r : GetResources())
-      r->CopyToHost(command);
+      r.second->CopyToHost(command);
   }
 
   return {};
@@ -79,11 +71,6 @@ Result BufferBackedDescriptor::MoveResourceToBufferOutput() {
     return {};
 
   auto resources = GetResources();
-  auto buffers = GetAmberBuffers();
-  if (resources.size() != buffers.size())
-    return Result(
-        "Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() resource "
-        "and buffer vector sizes are not matching");
 
   if (resources.empty()) {
     return Result(
@@ -91,26 +78,25 @@ Result BufferBackedDescriptor::MoveResourceToBufferOutput() {
         "transfer resource");
   }
 
-  for (size_t i = 0; i < resources.size(); i++) {
-    void* resource_memory_ptr = resources[i]->HostAccessibleMemoryPtr();
+  for (const auto& resource : resources) {
+    void* resource_memory_ptr = resource.second->HostAccessibleMemoryPtr();
+    auto* buffer = resource.first;
     if (!resource_memory_ptr) {
       return Result(
           "Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() "
           "no host accessible memory pointer");
     }
 
-    if (!buffers[i]->ValuePtr()->empty()) {
+    if (!buffer->ValuePtr()->empty()) {
       return Result(
           "Vulkan: BufferBackedDescriptor::MoveResourceToBufferOutput() "
           "output buffer is not empty");
     }
 
-    auto size_in_bytes = resources[i]->GetSizeInBytes();
-    buffers[i]->SetElementCount(size_in_bytes /
-                                buffers[i]->GetFormat()->SizeInBytes());
-    buffers[i]->ValuePtr()->resize(size_in_bytes);
-    std::memcpy(buffers[i]->ValuePtr()->data(), resource_memory_ptr,
-                size_in_bytes);
+    auto size_in_bytes = resource.second->GetSizeInBytes();
+    buffer->SetElementCount(size_in_bytes / buffer->GetFormat()->SizeInBytes());
+    buffer->ValuePtr()->resize(size_in_bytes);
+    std::memcpy(buffer->ValuePtr()->data(), resource_memory_ptr, size_in_bytes);
   }
 
   return {};
diff --git a/src/vulkan/buffer_backed_descriptor.h b/src/vulkan/buffer_backed_descriptor.h
index c626dd8..8f9df41 100644
--- a/src/vulkan/buffer_backed_descriptor.h
+++ b/src/vulkan/buffer_backed_descriptor.h
@@ -16,6 +16,7 @@
 #define SRC_VULKAN_BUFFER_BACKED_DESCRIPTOR_H_
 
 #include <memory>
+#include <utility>
 #include <vector>
 
 #include "amber/result.h"
@@ -51,7 +52,10 @@ class BufferBackedDescriptor : public Descriptor {
   bool IsReadOnly() const;
 
  protected:
-  virtual std::vector<Resource*> GetResources() = 0;
+  /// Returns a list of unique transfer buffer resources. Note that this list
+  /// may contain less items than the |amber_buffers| vector contains if two or
+  /// more amber buffers use same Vulkan buffer.
+  virtual std::vector<std::pair<Buffer*, Resource*>> GetResources() = 0;
 
  private:
   std::vector<Buffer*> amber_buffers_;
diff --git a/src/vulkan/buffer_descriptor.cc b/src/vulkan/buffer_descriptor.cc
index 510565d..aa8b2dd 100644
--- a/src/vulkan/buffer_descriptor.cc
+++ b/src/vulkan/buffer_descriptor.cc
@@ -14,6 +14,8 @@
 
 #include "src/vulkan/buffer_descriptor.h"
 
+#include <algorithm>
+#include <utility>
 #include <vector>
 
 #include "src/make_unique.h"
@@ -39,17 +41,23 @@ Result BufferDescriptor::CreateResourceIfNeeded() {
         "only when |transfer_buffers| is empty");
   }
 
-  transfer_buffers_.reserve(GetAmberBuffers().size());
+  descriptor_offsets_.reserve(GetAmberBuffers().size());
+  descriptor_ranges_.reserve(GetAmberBuffers().size());
 
   for (const auto& amber_buffer : GetAmberBuffers()) {
     if (amber_buffer->ValuePtr()->empty())
       continue;
 
-    uint32_t size_in_bytes =
-        amber_buffer ? static_cast<uint32_t>(amber_buffer->ValuePtr()->size())
-                     : 0;
-    transfer_buffers_.emplace_back(MakeUnique<TransferBuffer>(
-        device_, size_in_bytes, amber_buffer->GetFormat()));
+    // Check if the transfer buffer is already created.
+    if (transfer_buffers_.count(amber_buffer) > 0)
+      continue;
+
+    auto size_in_bytes =
+        static_cast<uint32_t>(amber_buffer->ValuePtr()->size());
+
+    auto transfer_buffer = MakeUnique<TransferBuffer>(
+        device_, size_in_bytes, amber_buffer->GetFormat());
+
     VkBufferUsageFlags flags =
         VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
     if (IsUniformBuffer() || IsUniformBufferDynamic()) {
@@ -64,9 +72,10 @@ Result BufferDescriptor::CreateResourceIfNeeded() {
       return Result("Unexpected buffer type when deciding usage flags");
     }
 
-    Result r = transfer_buffers_.back()->Initialize(flags);
+    Result r = transfer_buffer->Initialize(flags);
     if (!r.IsSuccess())
       return r;
+    transfer_buffers_[amber_buffer] = std::move(transfer_buffer);
   }
 
   is_descriptor_set_update_needed_ = true;
@@ -89,12 +98,33 @@ void BufferDescriptor::UpdateDescriptorSetIfNeeded(
   std::vector<VkDescriptorBufferInfo> buffer_infos;
   std::vector<VkBufferView> buffer_views;
 
-  for (const auto& buffer : transfer_buffers_) {
-    VkDescriptorBufferInfo buffer_info;
-    buffer_info.buffer = buffer->GetVkBuffer();
-    buffer_info.offset = 0;
-    buffer_info.range = VK_WHOLE_SIZE;
-    buffer_infos.push_back(buffer_info);
+  // Create VkDescriptorBufferInfo for every descriptor buffer.
+  for (uint32_t i = 0; i < GetAmberBuffers().size(); i++) {
+    const auto& buffer = transfer_buffers_[GetAmberBuffers()[i]];
+    assert(buffer->GetVkBuffer() && "Unexpected descriptor type");
+    // Add buffer infos for uniform and storage buffers.
+    if (IsUniformBuffer() || IsUniformBufferDynamic() || IsStorageBuffer() ||
+        IsStorageBufferDynamic()) {
+      uint64_t range = descriptor_ranges_[i];
+      // If dynamic offset is used, we must change range with VK_WHOLE_SIZE to
+      // an actual range.
+      // From vulkan spec: For each dynamic uniform or storage buffer binding in
+      // pDescriptorSets, the sum of the effective offset, as defined above, and
+      // the range of the binding must be less than or equal to the size of the
+      // buffer.
+      if ((IsUniformBufferDynamic() || IsStorageBufferDynamic()) &&
+          descriptor_ranges_[i] == VK_WHOLE_SIZE) {
+        range = buffer->GetSizeInBytes() - dynamic_offsets_[i] -
+                descriptor_offsets_[i];
+      }
+
+      VkDescriptorBufferInfo buffer_info;
+      buffer_info.buffer = buffer->GetVkBuffer();
+      buffer_info.offset = descriptor_offsets_[i];
+      buffer_info.range = range;
+
+      buffer_infos.push_back(buffer_info);
+    }
 
     if (IsUniformTexelBuffer() || IsStorageTexelBuffer()) {
       buffer_views.push_back(*buffer->GetVkBufferView());
@@ -106,7 +136,7 @@ void BufferDescriptor::UpdateDescriptorSetIfNeeded(
   write.dstSet = descriptor_set;
   write.dstBinding = binding_;
   write.dstArrayElement = 0;
-  write.descriptorCount = static_cast<uint32_t>(buffer_infos.size());
+  write.descriptorCount = static_cast<uint32_t>(GetAmberBuffers().size());
   write.descriptorType = GetVkDescriptorType();
   write.pBufferInfo = buffer_infos.data();
   write.pTexelBufferView = buffer_views.data();
@@ -116,10 +146,20 @@ void BufferDescriptor::UpdateDescriptorSetIfNeeded(
   is_descriptor_set_update_needed_ = false;
 }
 
-std::vector<Resource*> BufferDescriptor::GetResources() {
-  std::vector<Resource*> ret;
-  for (auto& b : transfer_buffers_) {
-    ret.push_back(b.get());
+std::vector<std::pair<Buffer*, Resource*>> BufferDescriptor::GetResources() {
+  std::vector<std::pair<Buffer*, Resource*>> ret;
+  // Add unique amber buffers and related transfer buffers to the vector.
+  for (const auto& amber_buffer : GetAmberBuffers()) {
+    // Skip duplicate values.
+    const auto& image =
+        std::find_if(ret.begin(), ret.end(),
+                     [&](const std::pair<Buffer*, Resource*>& buffer) {
+                       return buffer.first == amber_buffer;
+                     });
+    if (image != ret.end())
+      continue;
+
+    ret.emplace_back(amber_buffer, transfer_buffers_[amber_buffer].get());
   }
   return ret;
 }
diff --git a/src/vulkan/buffer_descriptor.h b/src/vulkan/buffer_descriptor.h
index d481ae5..2c3f390 100644
--- a/src/vulkan/buffer_descriptor.h
+++ b/src/vulkan/buffer_descriptor.h
@@ -16,6 +16,8 @@
 #define SRC_VULKAN_BUFFER_DESCRIPTOR_H_
 
 #include <memory>
+#include <unordered_map>
+#include <utility>
 #include <vector>
 
 #include "amber/result.h"
@@ -50,14 +52,30 @@ class BufferDescriptor : public BufferBackedDescriptor {
     return dynamic_offsets_;
   }
   void AddDynamicOffset(uint32_t offset) { dynamic_offsets_.push_back(offset); }
+  std::vector<uint64_t> GetDescriptorOffsets() override {
+    return descriptor_offsets_;
+  }
+  void AddDescriptorOffset(uint64_t descriptor_offset) {
+    descriptor_offsets_.push_back(descriptor_offset);
+  }
+  std::vector<uint64_t> GetDescriptorRanges() override {
+    return descriptor_ranges_;
+  }
+  void AddDescriptorRange(uint64_t descriptor_range) {
+    descriptor_ranges_.push_back(descriptor_range);
+  }
+
   BufferDescriptor* AsBufferDescriptor() override { return this; }
 
  protected:
-  std::vector<Resource*> GetResources() override;
+  std::vector<std::pair<Buffer*, Resource*>> GetResources() override;
 
  private:
-  std::vector<std::unique_ptr<TransferBuffer>> transfer_buffers_;
+  std::unordered_map<Buffer*, std::unique_ptr<TransferBuffer>>
+      transfer_buffers_;
   std::vector<uint32_t> dynamic_offsets_;
+  std::vector<VkDeviceSize> descriptor_offsets_;
+  std::vector<VkDeviceSize> descriptor_ranges_;
 };
 
 }  // namespace vulkan
diff --git a/src/vulkan/descriptor.h b/src/vulkan/descriptor.h
index ba702ff..03434a3 100644
--- a/src/vulkan/descriptor.h
+++ b/src/vulkan/descriptor.h
@@ -64,6 +64,8 @@ class Descriptor {
   virtual Result AddToBuffer(const std::vector<Value>&, uint32_t) { return {}; }
   virtual uint32_t GetDescriptorCount() { return 1; }
   virtual std::vector<uint32_t> GetDynamicOffsets() { return {}; }
+  virtual std::vector<VkDeviceSize> GetDescriptorOffsets() { return {}; }
+  virtual std::vector<VkDeviceSize> GetDescriptorRanges() { return {}; }
   virtual BufferDescriptor* AsBufferDescriptor() { return nullptr; }
   virtual BufferBackedDescriptor* AsBufferBackedDescriptor() { return nullptr; }
   virtual SamplerDescriptor* AsSamplerDescriptor() { return nullptr; }
diff --git a/src/vulkan/engine_vulkan.cc b/src/vulkan/engine_vulkan.cc
index 536993f..6bed716 100644
--- a/src/vulkan/engine_vulkan.cc
+++ b/src/vulkan/engine_vulkan.cc
@@ -254,6 +254,8 @@ Result EngineVulkan::CreatePipeline(amber::Pipeline* pipeline) {
     cmd->SetBinding(buf_info.binding);
     cmd->SetBaseMipLevel(buf_info.base_mip_level);
     cmd->SetDynamicOffset(buf_info.dynamic_offset);
+    cmd->SetDescriptorOffset(buf_info.descriptor_offset);
+    cmd->SetDescriptorRange(buf_info.descriptor_range);
     cmd->SetBuffer(buf_info.buffer);
     cmd->SetSampler(buf_info.sampler);
 
diff --git a/src/vulkan/graphics_pipeline.cc b/src/vulkan/graphics_pipeline.cc
index b83bea1..5536440 100644
--- a/src/vulkan/graphics_pipeline.cc
+++ b/src/vulkan/graphics_pipeline.cc
@@ -579,6 +579,16 @@ Result GraphicsPipeline::CreateVkGraphicsPipeline(
       0, 0, static_cast<float>(frame_width_), static_cast<float>(frame_height_),
       0, 1};
 
+  if (pipeline_data->HasViewportData()) {
+    Viewport vp = pipeline_data->GetViewport();
+    viewport.x = vp.x;
+    viewport.y = vp.y;
+    viewport.width = vp.w;
+    viewport.height = vp.h;
+    viewport.minDepth = vp.mind;
+    viewport.maxDepth = vp.maxd;
+  }
+
   VkRect2D scissor = {{0, 0}, {frame_width_, frame_height_}};
 
   VkPipelineViewportStateCreateInfo viewport_info =
diff --git a/src/vulkan/image_descriptor.cc b/src/vulkan/image_descriptor.cc
index 550ce0b..94e67d0 100644
--- a/src/vulkan/image_descriptor.cc
+++ b/src/vulkan/image_descriptor.cc
@@ -14,6 +14,10 @@
 
 #include "src/vulkan/image_descriptor.h"
 
+#include <algorithm>
+#include <unordered_map>
+#include <utility>
+
 #include "src/vulkan/device.h"
 #include "src/vulkan/resource.h"
 
@@ -34,9 +38,12 @@ ImageDescriptor::~ImageDescriptor() = default;
 
 Result ImageDescriptor::RecordCopyDataToResourceIfNeeded(
     CommandBuffer* command) {
-  for (auto& image : transfer_images_) {
-    image->ImageBarrier(command, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
-                        VK_PIPELINE_STAGE_TRANSFER_BIT);
+  const auto transfer_images = GetResources();
+  for (const auto& image : transfer_images) {
+    // Static cast is safe, because the type is known to be TransferImage*.
+    static_cast<TransferImage*>(image.second)
+        ->ImageBarrier(command, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
+                       VK_PIPELINE_STAGE_TRANSFER_BIT);
   }
 
   Result r = BufferBackedDescriptor::RecordCopyDataToResourceIfNeeded(command);
@@ -44,9 +51,10 @@ Result ImageDescriptor::RecordCopyDataToResourceIfNeeded(
     return r;
 
   // Just do this as early as possible.
-  for (auto& image : transfer_images_) {
-    image->ImageBarrier(command, VK_IMAGE_LAYOUT_GENERAL,
-                        VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
+  for (const auto& image : transfer_images) {
+    static_cast<TransferImage*>(image.second)
+        ->ImageBarrier(command, VK_IMAGE_LAYOUT_GENERAL,
+                       VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT);
   }
 
   return {};
@@ -59,12 +67,14 @@ Result ImageDescriptor::CreateResourceIfNeeded() {
         "only when |transfer_images| is empty");
   }
 
-  transfer_images_.reserve(GetAmberBuffers().size());
-
   for (const auto& amber_buffer : GetAmberBuffers()) {
     if (amber_buffer->ValuePtr()->empty())
       continue;
 
+    // Check if the transfer image is already created.
+    if (transfer_images_.count(amber_buffer) > 0)
+      continue;
+
     // Default to 2D image.
     VkImageType image_type = VK_IMAGE_TYPE_2D;
     switch (amber_buffer->GetImageDimension()) {
@@ -93,11 +103,11 @@ Result ImageDescriptor::CreateResourceIfNeeded() {
       aspect = VK_IMAGE_ASPECT_COLOR_BIT;
     }
 
-    transfer_images_.emplace_back(MakeUnique<TransferImage>(
+    auto transfer_image = MakeUnique<TransferImage>(
         device_, *fmt, aspect, image_type, amber_buffer->GetWidth(),
         amber_buffer->GetHeight(), amber_buffer->GetDepth(),
         amber_buffer->GetMipLevels(), base_mip_level_, VK_REMAINING_MIP_LEVELS,
-        amber_buffer->GetSamples()));
+        amber_buffer->GetSamples());
     VkImageUsageFlags usage =
         VK_IMAGE_USAGE_TRANSFER_SRC_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
 
@@ -109,10 +119,11 @@ Result ImageDescriptor::CreateResourceIfNeeded() {
       usage |= VK_IMAGE_USAGE_SAMPLED_BIT;
     }
 
-    Result r = transfer_images_.back()->Initialize(usage);
-
+    Result r = transfer_image->Initialize(usage);
     if (!r.IsSuccess())
       return r;
+
+    transfer_images_[amber_buffer] = std::move(transfer_image);
   }
 
   if (amber_sampler_) {
@@ -127,9 +138,10 @@ Result ImageDescriptor::CreateResourceIfNeeded() {
 
 Result ImageDescriptor::RecordCopyDataToHost(CommandBuffer* command) {
   if (!IsReadOnly()) {
-    for (auto& image : transfer_images_) {
-      image->ImageBarrier(command, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
-                          VK_PIPELINE_STAGE_TRANSFER_BIT);
+    for (auto& image : GetResources()) {
+      static_cast<TransferImage*>(image.second)
+          ->ImageBarrier(command, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
+                         VK_PIPELINE_STAGE_TRANSFER_BIT);
     }
 
     BufferBackedDescriptor::RecordCopyDataToHost(command);
@@ -156,7 +168,9 @@ void ImageDescriptor::UpdateDescriptorSetIfNeeded(
 
   std::vector<VkDescriptorImageInfo> image_infos;
 
-  for (const auto& image : transfer_images_) {
+  // Create VkDescriptorImageInfo for every descriptor image.
+  for (const auto& amber_buffer : GetAmberBuffers()) {
+    const auto& image = transfer_images_[amber_buffer];
     VkDescriptorImageInfo image_info = {vulkan_sampler_.GetVkSampler(),
                                         image->GetVkImageView(), layout};
     image_infos.push_back(image_info);
@@ -177,10 +191,20 @@ void ImageDescriptor::UpdateDescriptorSetIfNeeded(
   is_descriptor_set_update_needed_ = false;
 }
 
-std::vector<Resource*> ImageDescriptor::GetResources() {
-  std::vector<Resource*> ret;
-  for (auto& i : transfer_images_) {
-    ret.push_back(i.get());
+std::vector<std::pair<Buffer*, Resource*>> ImageDescriptor::GetResources() {
+  std::vector<std::pair<Buffer*, Resource*>> ret;
+  // Add unique amber buffers and related transfer images to the vector.
+  for (const auto& amber_buffer : GetAmberBuffers()) {
+    // Skip duplicate values.
+    const auto& image =
+        std::find_if(ret.begin(), ret.end(),
+                     [&](const std::pair<Buffer*, Resource*>& buffer) {
+                       return buffer.first == amber_buffer;
+                     });
+    if (image != ret.end())
+      continue;
+
+    ret.emplace_back(amber_buffer, transfer_images_[amber_buffer].get());
   }
   return ret;
 }
diff --git a/src/vulkan/image_descriptor.h b/src/vulkan/image_descriptor.h
index 5f8dd0e..908ed17 100644
--- a/src/vulkan/image_descriptor.h
+++ b/src/vulkan/image_descriptor.h
@@ -16,6 +16,8 @@
 #define SRC_VULKAN_IMAGE_DESCRIPTOR_H_
 
 #include <memory>
+#include <unordered_map>
+#include <utility>
 #include <vector>
 
 #include "src/vulkan/buffer_backed_descriptor.h"
@@ -43,11 +45,11 @@ class ImageDescriptor : public BufferBackedDescriptor {
   void SetAmberSampler(amber::Sampler* sampler) { amber_sampler_ = sampler; }
 
  protected:
-  std::vector<Resource*> GetResources() override;
+  std::vector<std::pair<Buffer*, Resource*>> GetResources() override;
 
  private:
   uint32_t base_mip_level_ = 0;
-  std::vector<std::unique_ptr<TransferImage>> transfer_images_;
+  std::unordered_map<Buffer*, std::unique_ptr<TransferImage>> transfer_images_;
   amber::Sampler* amber_sampler_ = nullptr;
   amber::vulkan::Sampler vulkan_sampler_;
 };
diff --git a/src/vulkan/pipeline.cc b/src/vulkan/pipeline.cc
index e0b875c..259f375 100644
--- a/src/vulkan/pipeline.cc
+++ b/src/vulkan/pipeline.cc
@@ -322,6 +322,7 @@ Result Pipeline::AddBufferDescriptor(const BufferCommand* cmd) {
           cmd->GetDescriptorSet(), cmd->GetBinding());
       if (cmd->IsCombinedImageSampler())
         image_desc->SetAmberSampler(cmd->GetSampler());
+
       descriptors.push_back(std::move(image_desc));
     } else {
       auto buffer_desc = MakeUnique<BufferDescriptor>(
@@ -336,18 +337,18 @@ Result Pipeline::AddBufferDescriptor(const BufferCommand* cmd) {
           "Descriptors bound to the same binding needs to have matching "
           "descriptor types");
     }
-    // Check that the buffer is not added already.
-    const auto& buffers = desc->AsBufferBackedDescriptor()->GetAmberBuffers();
-    if (std::find(buffers.begin(), buffers.end(), cmd->GetBuffer()) !=
-        buffers.end()) {
-      return Result("Buffer has been added already");
-    }
     desc->AsBufferBackedDescriptor()->AddAmberBuffer(cmd->GetBuffer());
   }
 
   if (cmd->IsUniformDynamic() || cmd->IsSSBODynamic())
     desc->AsBufferDescriptor()->AddDynamicOffset(cmd->GetDynamicOffset());
 
+  if (cmd->IsUniform() || cmd->IsUniformDynamic() || cmd->IsSSBO() ||
+      cmd->IsSSBODynamic()) {
+    desc->AsBufferDescriptor()->AddDescriptorOffset(cmd->GetDescriptorOffset());
+    desc->AsBufferDescriptor()->AddDescriptorRange(cmd->GetDescriptorRange());
+  }
+
   if (cmd->IsSSBO() && !desc->IsStorageBuffer()) {
     return Result(
         "Vulkan::AddBufferDescriptor BufferCommand for SSBO uses wrong "
diff --git a/src/vulkan/pipeline_test.cc b/src/vulkan/pipeline_test.cc
index 53eca44..9f60174 100644
--- a/src/vulkan/pipeline_test.cc
+++ b/src/vulkan/pipeline_test.cc
@@ -44,9 +44,9 @@ TEST_F(VulkanPipelineTest, AddBufferDescriptorAddBufferTwice) {
                                        &amber_pipeline);
   Result r = pipeline.AddBufferDescriptor(cmd.get());
   ASSERT_TRUE(r.IsSuccess()) << r.Error();
-  // Adding same buffer again should fail.
+  // Adding same buffer again shouldn't fail.
   r = pipeline.AddBufferDescriptor(cmd.get());
-  ASSERT_FALSE(r.IsSuccess());
+  ASSERT_TRUE(r.IsSuccess());
 }
 
 }  // namespace vulkan
diff --git a/tests/cases/compute_descriptor_array_ssbo.amber b/tests/cases/compute_descriptor_array_ssbo.amber
index bd4c773..0eb6b7d 100644
--- a/tests/cases/compute_descriptor_array_ssbo.amber
+++ b/tests/cases/compute_descriptor_array_ssbo.amber
@@ -20,12 +20,19 @@ layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
 layout(binding = 0) buffer block0
 {
     int data;
-} ssbo_array[2];
+} ssbo_array_0[2];
+
+layout(binding = 1) buffer block1
+{
+    int data;
+} ssbo_array_1[2];
 
 void main()
 {
-    ssbo_array[0].data = 1;
-    ssbo_array[1].data = 2;
+    ssbo_array_0[0].data = 1;
+    ssbo_array_0[1].data = 2;
+    ssbo_array_1[0].data = 3;
+    ssbo_array_1[1].data = 4;
 }
 END
 
@@ -37,13 +44,21 @@ BUFFER buf1 DATA_TYPE int32 DATA
 0
 END
 
+# The Vulkan spec lists the maximum value of minStorageBufferOffsetAlignment
+# (i.e. the maximum possible alignment requirement) as 256 bytes, so we will use
+# buffer with size of 65 int32 values = 260 bytes.
+BUFFER buf2 DATA_TYPE int32 SIZE 65 FILL 0
+
 PIPELINE compute pipeline
   ATTACH compute_shader
 
   BIND BUFFER_ARRAY buf0 buf1 AS storage DESCRIPTOR_SET 0 BINDING 0
+  BIND BUFFER_ARRAY buf2 buf2 AS storage DESCRIPTOR_SET 0 BINDING 1 DESCRIPTOR_OFFSET 0 256 DESCRIPTOR_RANGE 256 4
 END
 
 RUN pipeline 1 1 1
 
 EXPECT buf0 IDX 0 EQ 1
 EXPECT buf1 IDX 0 EQ 2
+EXPECT buf2 IDX 0 EQ 3
+EXPECT buf2 IDX 256 EQ 4
diff --git a/tests/cases/compute_descriptor_array_storagetexelbuffer.amber b/tests/cases/compute_descriptor_array_storagetexelbuffer.amber
index d4a1994..3ddae3c 100644
--- a/tests/cases/compute_descriptor_array_storagetexelbuffer.amber
+++ b/tests/cases/compute_descriptor_array_storagetexelbuffer.amber
@@ -17,13 +17,20 @@ SHADER compute compute_shader GLSL
 #version 430
 layout(local_size_x=4,local_size_y=1) in;
 uniform layout(set=0, binding=0) samplerBuffer texelsIn;
-uniform layout(set=0, binding=1, rgba32f) imageBuffer texelsOut[2];
+uniform layout(set=0, binding=1, rgba32f) imageBuffer texelsOut_0[2];
+uniform layout(set=0, binding=2, rgba32f) imageBuffer texelsOut_1[2];
 
 void main ()
 {
     vec4 color = texelFetch(texelsIn, int(gl_GlobalInvocationID));
-    imageStore(texelsOut[0], int(gl_GlobalInvocationID), color);
-    imageStore(texelsOut[1], int(gl_GlobalInvocationID), color * 2.0);
+    imageStore(texelsOut_0[0], int(gl_GlobalInvocationID), color);
+    imageStore(texelsOut_0[1], int(gl_GlobalInvocationID), color * 2.0);
+    if (int(gl_GlobalInvocationID) < 2) {
+      imageStore(texelsOut_1[0], int(gl_GlobalInvocationID), color * 3.0);
+    }
+    else {
+      imageStore(texelsOut_1[1], int(gl_GlobalInvocationID), color * 4.0);
+    }
 }
 END
 
@@ -36,6 +43,7 @@ END
 
 BUFFER texel_buffer_out0 DATA_TYPE R32G32B32A32_SFLOAT SIZE 4 FILL 0
 BUFFER texel_buffer_out1 DATA_TYPE R32G32B32A32_SFLOAT SIZE 4 FILL 0
+BUFFER texel_buffer_out2 DATA_TYPE R32G32B32A32_SFLOAT SIZE 4 FILL 0
 
 BUFFER ref0 DATA_TYPE R32G32B32A32_SFLOAT DATA
 1.0 0.0 0.0 1.0
@@ -51,13 +59,22 @@ BUFFER ref1 DATA_TYPE R32G32B32A32_SFLOAT DATA
 0.0 2.0 2.0 2.0
 END
 
+BUFFER ref2 DATA_TYPE R32G32B32A32_SFLOAT DATA
+3.0 0.0 0.0 3.0
+0.0 3.0 0.0 3.0
+0.0 0.0 4.0 4.0
+0.0 4.0 4.0 4.0
+END
+
 PIPELINE compute pipeline
   ATTACH compute_shader
   BIND BUFFER texel_buffer_in AS uniform_texel_buffer DESCRIPTOR_SET 0 BINDING 0
   BIND BUFFER_ARRAY texel_buffer_out0 texel_buffer_out1 AS storage_texel_buffer DESCRIPTOR_SET 0 BINDING 1
+  BIND BUFFER_ARRAY texel_buffer_out2 texel_buffer_out2 AS storage_texel_buffer DESCRIPTOR_SET 0 BINDING 2
 END
 
 RUN pipeline 1 1 1
 
 EXPECT texel_buffer_out0 EQ_BUFFER ref0
 EXPECT texel_buffer_out1 EQ_BUFFER ref1
+EXPECT texel_buffer_out2 EQ_BUFFER ref2
diff --git a/tests/cases/compute_dynamic_buffers.amber b/tests/cases/compute_dynamic_buffers.amber
index 9412e30..9dd4149 100644
--- a/tests/cases/compute_dynamic_buffers.amber
+++ b/tests/cases/compute_dynamic_buffers.amber
@@ -25,11 +25,16 @@ layout(set = 0, binding = 1) buffer block1
 {
     vec4 data1;
 };
+layout(set = 0, binding = 2) buffer block2
+{
+    vec4 data2;
+};
 
 void main()
 {
     data0 = vec4(1, 2, 3, 4);
     data1 = vec4(5, 6, 7, 8);
+    data2 = vec4(9, 10, 11, 12);
 }
 END
 
@@ -39,6 +44,7 @@ END
 # after the alignment (256 / 16 + 1).
 BUFFER buf0 DATA_TYPE vec4<float> SIZE 17 FILL 0.0
 BUFFER buf1 DATA_TYPE vec4<float> SIZE 17 FILL 0.0
+BUFFER buf2 DATA_TYPE vec4<float> SIZE 33 FILL 0.0
 
 PIPELINE compute pipeline
   ATTACH compute_shader
@@ -46,9 +52,12 @@ PIPELINE compute pipeline
   BIND BUFFER buf0 AS storage_dynamic DESCRIPTOR_SET 0 BINDING 0 OFFSET 0
   # Using the maximum possible required offset alignment of 256 bytes to support all implementations.
   BIND BUFFER buf1 AS storage_dynamic DESCRIPTOR_SET 0 BINDING 1 OFFSET 256
+  # Same as above, but with buffer offset of 256 bytes (total offset of 512).
+  BIND BUFFER buf2 AS storage_dynamic DESCRIPTOR_SET 0 BINDING 2 OFFSET 256 DESCRIPTOR_OFFSET 256
 END
 
 RUN pipeline 1 1 1
 
 EXPECT buf0 IDX 0 EQ 1.0 2.0 3.0 4.0
 EXPECT buf1 IDX 256 EQ 5.0 6.0 7.0 8.0
+EXPECT buf2 IDX 512 EQ 9.0 10.0 11.0 12.0
diff --git a/tests/cases/compute_dynamic_buffers_descriptor_array.amber b/tests/cases/compute_dynamic_buffers_descriptor_array.amber
index fe07b6c..ccc4c42 100644
--- a/tests/cases/compute_dynamic_buffers_descriptor_array.amber
+++ b/tests/cases/compute_dynamic_buffers_descriptor_array.amber
@@ -19,12 +19,18 @@ SHADER compute compute_shader GLSL
 layout(set = 0, binding = 0) buffer block0
 {
     vec4 data;
-} ssbo_array[2];
+} ssbo_array_0[2];
+layout(set = 0, binding = 1) buffer block1
+{
+    int data;
+} ssbo_array_1[2];
 
 void main()
 {
-    ssbo_array[0].data = vec4(1, 2, 3, 4);
-    ssbo_array[1].data = vec4(5, 6, 7, 8);
+    ssbo_array_0[0].data = vec4(1, 2, 3, 4);
+    ssbo_array_0[1].data = vec4(5, 6, 7, 8);
+    ssbo_array_1[0].data = 9;
+    ssbo_array_1[1].data = 10;
 }
 END
 
@@ -34,15 +40,20 @@ END
 # after the alignment (256 / 16 + 1).
 BUFFER buf0 DATA_TYPE vec4<float> SIZE 17 FILL 0.0
 BUFFER buf1 DATA_TYPE vec4<float> SIZE 17 FILL 0.0
+# Same as above, but with int32 and double size: 512 / 4 + 1
+BUFFER buf2 DATA_TYPE int32 SIZE 129 FILL 0
 
 PIPELINE compute pipeline
   ATTACH compute_shader
 
   # Using the maximum possible required offset alignment of 256 bytes to support all implementations.
   BIND BUFFER_ARRAY buf0 buf1 AS storage_dynamic DESCRIPTOR_SET 0 BINDING 0 OFFSET 0 256
+  BIND BUFFER_ARRAY buf2 buf2 AS storage_dynamic DESCRIPTOR_SET 0 BINDING 1 OFFSET 0 256 DESCRIPTOR_OFFSET 0 256
 END
 
 RUN pipeline 1 1 1
 
 EXPECT buf0 IDX 0 EQ 1.0 2.0 3.0 4.0
 EXPECT buf1 IDX 256 EQ 5.0 6.0 7.0 8.0
+EXPECT buf2 IDX 0 EQ 9
+EXPECT buf2 IDX 512 EQ 10
diff --git a/tests/cases/graphics_descriptor_array_combined_image_sampler.amber b/tests/cases/graphics_descriptor_array_combined_image_sampler.amber
index d7fe3c0..e80ca1e 100644
--- a/tests/cases/graphics_descriptor_array_combined_image_sampler.amber
+++ b/tests/cases/graphics_descriptor_array_combined_image_sampler.amber
@@ -40,10 +40,16 @@ SHADER fragment frag_shader_tex GLSL
 #version 430
 layout(location = 0) in vec2 texcoords_in;
 layout(location = 0) out vec4 color_out;
-uniform layout(set=0, binding=0) sampler2D tex_sampler[2];
+uniform layout(set=0, binding=0) sampler2D tex_sampler_0[2];
+uniform layout(set=0, binding=1) sampler2D tex_sampler_1[2];
 void main() {
-  color_out = texture(tex_sampler[0], texcoords_in);
-  color_out = color_out + texture(tex_sampler[1], texcoords_in);
+  vec4 tex_0_color = texture(tex_sampler_0[0], texcoords_in);
+  color_out = tex_0_color + texture(tex_sampler_0[1], texcoords_in);
+  // tex_sampler_1[0] and tex_sampler_1[1] should be equal to tex_sampler_0[0]
+  if (tex_0_color != texture(tex_sampler_1[0], texcoords_in) || 
+      tex_0_color != texture(tex_sampler_1[1], texcoords_in)) {
+      color_out = vec4(1.0);
+  }
 }
 END
 
@@ -75,6 +81,7 @@ PIPELINE graphics pipeline
   ATTACH vert_shader_tex
   ATTACH frag_shader_tex
   BIND BUFFER_ARRAY texture0 texture1 AS combined_image_sampler SAMPLER sampler DESCRIPTOR_SET 0 BINDING 0
+  BIND BUFFER_ARRAY texture0 texture0 AS combined_image_sampler SAMPLER sampler DESCRIPTOR_SET 0 BINDING 1
   VERTEX_DATA position LOCATION 0
   VERTEX_DATA texcoords LOCATION 1
   BIND BUFFER framebuffer AS color LOCATION 0
diff --git a/tests/cases/graphics_descriptor_array_sampled_image.amber b/tests/cases/graphics_descriptor_array_sampled_image.amber
index 497f6da..3342054 100644
--- a/tests/cases/graphics_descriptor_array_sampled_image.amber
+++ b/tests/cases/graphics_descriptor_array_sampled_image.amber
@@ -40,11 +40,18 @@ SHADER fragment frag_shader_tex GLSL
 #version 430
 layout(location = 0) in vec2 texcoords_in;
 layout(location = 0) out vec4 color_out;
-uniform layout(set=0, binding=0) texture2D tex[2];
+uniform layout(set=0, binding=0) texture2D tex_0[2];
 uniform layout(set=0, binding=1) sampler tex_sampler;
+uniform layout(set=0, binding=2) texture2D tex_1[2];
 void main() {
-  color_out = texture(sampler2D(tex[0], tex_sampler), texcoords_in);
-  color_out += texture(sampler2D(tex[1], tex_sampler), texcoords_in);
+  vec4 tex_0_color = texture(sampler2D(tex_0[0], tex_sampler), texcoords_in);
+  color_out = tex_0_color;
+  color_out += texture(sampler2D(tex_0[1], tex_sampler), texcoords_in);
+  // tex_1[0] and tex_1[1] should be equal to tex_0[0].
+  if (tex_0_color != texture(sampler2D(tex_1[0], tex_sampler), texcoords_in) ||
+      tex_0_color != texture(sampler2D(tex_1[1], tex_sampler), texcoords_in)) {
+      color_out = vec4(1.0);
+  }
 }
 END
 
@@ -77,6 +84,7 @@ PIPELINE graphics pipeline
   ATTACH frag_shader_tex
   BIND BUFFER_ARRAY texture0 texture1 AS sampled_image DESCRIPTOR_SET 0 BINDING 0
   BIND SAMPLER sampler DESCRIPTOR_SET 0 BINDING 1
+  BIND BUFFER_ARRAY texture0 texture0 AS sampled_image DESCRIPTOR_SET 0 BINDING 2
   VERTEX_DATA position LOCATION 0
   VERTEX_DATA texcoords LOCATION 1
   BIND BUFFER framebuffer AS color LOCATION 0
diff --git a/tests/cases/non_default_entry_point.amber b/tests/cases/non_default_entry_point.amber
index 36b2135..3a0892f 100644
--- a/tests/cases/non_default_entry_point.amber
+++ b/tests/cases/non_default_entry_point.amber
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+DEVICE_EXTENSION VK_KHR_storage_buffer_storage_class
+
 SHADER compute my_shader SPIRV-ASM
                OpCapability Shader
                OpExtension "SPV_KHR_storage_buffer_storage_class"
diff --git a/tests/cases/shader_specialization.amber b/tests/cases/shader_specialization.amber
index 1db2a4f..4514b6f 100644
--- a/tests/cases/shader_specialization.amber
+++ b/tests/cases/shader_specialization.amber
@@ -13,6 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+DEVICE_EXTENSION VK_KHR_storage_buffer_storage_class
+
 SHADER compute my_compute SPIRV-ASM
 OpCapability Shader
 OpExtension "SPV_KHR_storage_buffer_storage_class"
diff --git a/tests/cases/storage16.amber b/tests/cases/storage16.amber
index 5cf8113..36a62dc 100644
--- a/tests/cases/storage16.amber
+++ b/tests/cases/storage16.amber
@@ -19,6 +19,7 @@ DEVICE_EXTENSION VK_KHR_16bit_storage
 DEVICE_FEATURE shaderInt16
 DEVICE_FEATURE Storage16BitFeatures.uniformAndStorageBuffer16BitAccess
 DEVICE_FEATURE Storage16BitFeatures.storagePushConstant16
+DEVICE_FEATURE Storage16BitFeatures.storageBuffer16BitAccess
 
 SHADER compute comp_shader GLSL
 #version 450
diff --git a/tests/cases/viewport.amber b/tests/cases/viewport.amber
new file mode 100644
index 0000000..ca9b0a5
--- /dev/null
+++ b/tests/cases/viewport.amber
@@ -0,0 +1,59 @@
+#!amber
+#
+# Copyright 2021 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.
+
+SHADER vertex vert_shader GLSL
+#version 430
+
+layout(location = 0) in vec4 position;
+
+void main() {
+  gl_Position = vec4(position.xy, 0.5, 1.0);
+}
+END
+
+SHADER fragment frag_shader GLSL
+#version 430
+
+layout(location = 0) out vec4 final_color;
+
+void main() {
+  final_color = vec4(0, 1, 0, 1);
+}
+END
+
+BUFFER framebuffer FORMAT B8G8R8A8_UNORM
+
+PIPELINE graphics pipeline1
+  ATTACH vert_shader
+  ATTACH frag_shader
+
+  FRAMEBUFFER_SIZE 256 256
+  VIEWPORT 10.0 10.0 SIZE 100.0 100.0
+
+  BIND BUFFER framebuffer AS color LOCATION 0
+END
+
+CLEAR_COLOR pipeline1 255 255 255 255
+CLEAR pipeline1
+RUN pipeline1 DRAW_RECT POS 0 0 SIZE 256 256
+
+# Check within the viewport
+EXPECT framebuffer IDX 10 10 SIZE 100 100 EQ_RGBA   0 255   0 255
+# Check the borders were untouched
+EXPECT framebuffer IDX   0   0 SIZE  10 256 EQ_RGBA 255 255 255 255
+EXPECT framebuffer IDX 110   0 SIZE 146 256 EQ_RGBA 255 255 255 255
+EXPECT framebuffer IDX  10   0 SIZE 100  10 EQ_RGBA 255 255 255 255
+EXPECT framebuffer IDX  10 110 SIZE 100 146 EQ_RGBA 255 255 255 255
diff --git a/tests/cases/viewport_depth.amber b/tests/cases/viewport_depth.amber
new file mode 100644
index 0000000..2bf7a9e
--- /dev/null
+++ b/tests/cases/viewport_depth.amber
@@ -0,0 +1,61 @@
+#!amber
+#
+# Copyright 2021 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.
+
+SHADER vertex vert_shader GLSL
+#version 430
+
+layout(location = 0) in vec4 position;
+
+void main() {
+  gl_Position = vec4(position.xy, 0.5, 1.0);
+}
+END
+
+SHADER fragment frag_shader GLSL
+#version 430
+
+layout(location = 0) out vec4 final_color;
+
+void main() {
+  final_color = vec4(0, 1, 0, 1);
+}
+END
+
+BUFFER framebuffer FORMAT B8G8R8A8_UNORM
+BUFFER depth FORMAT D32_SFLOAT
+
+PIPELINE graphics pipeline1
+  ATTACH vert_shader
+  ATTACH frag_shader
+
+  DEPTH
+    TEST on
+    WRITE on
+  END
+
+  FRAMEBUFFER_SIZE 256 256
+  VIEWPORT 0.0 0.0 SIZE 256.0 256.0 MIN_DEPTH 0.3 MAX_DEPTH 0.9
+
+  BIND BUFFER framebuffer AS color LOCATION 0
+  BIND BUFFER depth AS depth_stencil
+END
+
+CLEAR_DEPTH pipeline1 1.0
+CLEAR_COLOR pipeline1 255 255 255 255
+CLEAR pipeline1
+RUN pipeline1 DRAW_RECT POS 0 0 SIZE 256 256
+
+EXPECT depth IDX 0 TOLERANCE 1.0e-6 EQ 0.6