Vulkan: add draw triangles (#52)

Vulkan: add draw triangles

Add tests/cases/draw_triangle_list.amber to test drawing simple
triangles and update engine to conduct draw based on parameters of
draw array command.

Fixes #57 

8 files changed, 107 insertions, 21 deletions

diff --git a/tests/cases/clear.amber b/tests/cases/clear.amber
index b178987..6068b98 100644
--- a/tests/cases/clear.amber
+++ b/tests/cases/clear.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/clear_and_probe_all_wrong_color.expect_fail.amber b/tests/cases/clear_and_probe_all_wrong_color.expect_fail.amber
index fda1da2..82f34cd 100644
--- a/tests/cases/clear_and_probe_all_wrong_color.expect_fail.amber
+++ b/tests/cases/clear_and_probe_all_wrong_color.expect_fail.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/clear_and_probe_small_wrong_color.expect_fail.amber b/tests/cases/clear_and_probe_small_wrong_color.expect_fail.amber
index 54eee4f..431fb31 100644
--- a/tests/cases/clear_and_probe_small_wrong_color.expect_fail.amber
+++ b/tests/cases/clear_and_probe_small_wrong_color.expect_fail.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/clear_and_probe_too_large_rect.expect_fail.amber b/tests/cases/clear_and_probe_too_large_rect.expect_fail.amber
index ed58f41..a4c8bfb 100644
--- a/tests/cases/clear_and_probe_too_large_rect.expect_fail.amber
+++ b/tests/cases/clear_and_probe_too_large_rect.expect_fail.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/clear_color.amber b/tests/cases/clear_color.amber
index 74433de..634ae8b 100644
--- a/tests/cases/clear_color.amber
+++ b/tests/cases/clear_color.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/clear_color_without_clear_command.expect_fail.amber b/tests/cases/clear_color_without_clear_command.expect_fail.amber
index e367c6d..608c0c9 100644
--- a/tests/cases/clear_color_without_clear_command.expect_fail.amber
+++ b/tests/cases/clear_color_without_clear_command.expect_fail.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }
 
diff --git a/tests/cases/draw_triangle_list.amber b/tests/cases/draw_triangle_list.amber
new file mode 100644
index 0000000..a15c0a1
--- /dev/null
+++ b/tests/cases/draw_triangle_list.amber
@@ -0,0 +1,100 @@
+# 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.
+
+[vertex shader]
+#version 430
+
+layout(location = 0) in vec4 position;
+layout(location = 1) in vec4 vert_color;
+layout(location = 0) out vec4 frag_color;
+
+void main() {
+  gl_Position = position;
+  frag_color = vert_color;
+}
+
+[fragment shader]
+#version 430
+
+layout(location = 0) in vec4 frag_color;
+layout(location = 0) out vec4 final_color;
+
+void main() {
+  final_color = frag_color;
+}
+
+[vertex data]
+#        position     vert_color
+     0/R8G8_SNORM 1/R8G8B8_UNORM
+
+#           Red for entire frame
+#         R8   G8     R8  G8  B8
+        -128 -128    255   0   0
+         127  127    255   0   0
+        -128  127    255   0   0
+
+        -128 -128    255   0   0
+         127  127    255   0   0
+         127 -128    255   0   0
+
+#           Green for half frame
+#         R8   G8     R8  G8  B8
+           0 -128      0 255   0
+         127  127      0 255   0
+           0  127      0 255   0
+
+           0 -128      0 255   0
+         127  127      0 255   0
+         127 -128      0 255   0
+
+#         Blue for quarter frame
+#         R8   G8     R8  G8  B8
+        -128    0      0   0 255
+           0  127      0   0 255
+        -128  127      0   0 255
+
+        -128    0      0   0 255
+           0  127      0   0 255
+           0    0      0   0 255
+
+#  Mixed color for quarter frame
+#         R8   G8     R8  G8  B8
+           0    0    128 128 128
+         127  127    128 128 128
+           0  127    128 128 128
+
+           0    0    128 128 128
+         127  127    128 128 128
+         127    0    128 128 128
+
+[test]
+clear
+
+draw arrays TRIANGLE_LIST 0 6
+relative probe rect rgb (0.0, 0.0, 1.0, 1.0) (1.0, 0, 0)
+
+draw arrays TRIANGLE_LIST 6 6
+relative probe rect rgb (0.0, 0.0, 0.5, 1.0) (1.0, 0, 0)
+relative probe rect rgb (0.5, 0.0, 0.5, 1.0) (0, 1.0, 0)
+
+draw arrays TRIANGLE_LIST 12 6
+relative probe rect rgb (0.0, 0.0, 0.5, 0.5) (1.0, 0, 0)
+relative probe rect rgb (0.5, 0.0, 0.5, 1.0) (0, 1.0, 0)
+relative probe rect rgb (0.0, 0.5, 0.5, 0.5) (0, 0, 1.0)
+
+draw arrays TRIANGLE_LIST 18 6
+relative probe rect rgb (0.0, 0.0, 0.5, 0.5) (1.0, 0, 0)
+relative probe rect rgb (0.5, 0.0, 0.5, 0.5) (0, 1.0, 0)
+relative probe rect rgb (0.0, 0.5, 0.5, 0.5) (0, 0, 1.0)
+relative probe rect rgb (0.5, 0.5, 0.5, 0.5) (0.5, 0.5, 0.5)
diff --git a/tests/cases/multiple_clear_color.amber b/tests/cases/multiple_clear_color.amber
index ede2d82..f70d97e 100644
--- a/tests/cases/multiple_clear_color.amber
+++ b/tests/cases/multiple_clear_color.amber
@@ -20,9 +20,7 @@
 layout(location = 0) in vec4 color_in;
 layout(location = 0) out vec4 color_out;
 
-void
-main()
-{
+void main() {
   color_out = color_in;
 }