Add polygon mode support for AmberScript (#806)

Polygon mode was only supported by VkScript. This adds the support for AmberScript.

1 files changed, 90 insertions, 0 deletions

diff --git a/tests/cases/draw_polygon_mode.amber b/tests/cases/draw_polygon_mode.amber
new file mode 100644
index 0000000..70ae15b
--- /dev/null
+++ b/tests/cases/draw_polygon_mode.amber
@@ -0,0 +1,90 @@
+#!amber
+# Copyright 2020 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.
+
+DEVICE_FEATURE fillModeNonSolid
+
+SHADER vertex vert_shader PASSTHROUGH
+
+SHADER fragment frag_shader GLSL
+#version 430
+
+layout(location = 0) out vec4 color;
+
+void main()
+{
+    color = vec4(1);
+}
+END
+
+BUFFER position_large DATA_TYPE R8G8_SNORM DATA
+-120 -120
+   0  120
+ 120 -120
+END
+
+BUFFER position_small DATA_TYPE R8G8_SNORM DATA
+-60 -60
+  0  60
+ 60 -60
+END
+
+BUFFER framebuffer FORMAT B8G8R8A8_UNORM
+
+PIPELINE graphics pipeline_line
+  ATTACH vert_shader
+  ATTACH frag_shader
+
+  VERTEX_DATA position_large LOCATION 0
+  POLYGON_MODE line
+
+  BIND BUFFER framebuffer AS color LOCATION 0
+  FRAMEBUFFER_SIZE 256 256
+END
+
+PIPELINE graphics pipeline_point
+  ATTACH vert_shader
+  ATTACH frag_shader
+
+  VERTEX_DATA position_small LOCATION 0
+  POLYGON_MODE point
+
+  BIND BUFFER framebuffer AS color LOCATION 0
+  FRAMEBUFFER_SIZE 256 256
+END
+
+PIPELINE graphics pipeline_line_grid
+  ATTACH vert_shader
+  ATTACH frag_shader
+  POLYGON_MODE line
+
+  BIND BUFFER framebuffer AS color LOCATION 0
+  FRAMEBUFFER_SIZE 256 256
+END
+
+CLEAR_COLOR pipeline_line 0 0 0 255
+CLEAR pipeline_line
+# Draw a large triangle with lines
+RUN pipeline_line DRAW_ARRAY AS TRIANGLE_LIST START_IDX 0 COUNT 3
+# Draw a rect with points
+RUN pipeline_point DRAW_RECT POS 20 20 SIZE 216 216
+# Draw a small triangle with points
+RUN pipeline_point DRAW_ARRAY AS TRIANGLE_LIST START_IDX 0 COUNT 3
+# Draw a line grid overlapping the small triangle
+RUN pipeline_line_grid DRAW_GRID POS 80 40 SIZE 96 96 CELLS 3 3
+
+# Make sure no solid triangle was drawn by checking the center
+# of the middle grid triangle. That location is covered by all
+# drawn primitives.
+EXPECT framebuffer IDX 134 82 SIZE 5 5 EQ_RGBA 0 0 0 255