#!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.

SHADER vertex vert_shader GLSL
#version 430

layout(location = 0) in vec4 position;
layout(location = 1) flat out vec4 frag_color;

void main() {
  gl_Position = position;
  frag_color = position;
}
END

SHADER fragment frag_shader GLSL
#version 430
layout(location = 0) out vec4 color_out;
layout(location = 1) flat in vec4 frag_color;
void main() {
  ivec2 iv = ivec2(frag_color.xy * 256);
  if ((iv.x & 64) + ((iv.y / 2) & 64) == 64)
    color_out = vec4(1, 0, 0, 1);
  else
    color_out = vec4(0, 1, 1, 1);
}
END

BUFFER framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics my_pipeline
  ATTACH vert_shader
  ATTACH frag_shader
  BIND BUFFER framebuffer AS color LOCATION 0
END

RUN my_pipeline DRAW_GRID POS 0 0 SIZE 250 250 CELLS 8 4
EXPECT framebuffer IDX 0 0 SIZE 30 60 EQ_RGBA 0 255 255 255
EXPECT framebuffer IDX 32 64 SIZE 30 60 EQ_RGBA 0 255 255 255
EXPECT framebuffer IDX 32 0 SIZE 30 60 EQ_RGBA 255 0 0 255
EXPECT framebuffer IDX 0 64 SIZE 30 60 EQ_RGBA 255 0 0 255