draw_polygon_mode.amber

#!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