#!amber
# Copyright 2020 Google LLC
#
# 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 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 vec2 position_in;
layout(location = 1) in vec2 color_in[3];
layout(location = 0) smooth out vec2 color_out[3];

void main()
{
	gl_Position = vec4(position_in, 0, 1);
    for (int i = 0; i < 3; i++)
        color_out[i] = color_in[i];
}
END

SHADER fragment frag_shader GLSL
#version 430
layout(location = 0) smooth in vec2 color_in[3];
layout(location = 0) out lowp vec2 frag_out[3];
void main()
{
    for (int i = 0; i < 3; i++)
        frag_out[i] = color_in[i];
}
END

SHADER vertex vert_shader_ref GLSL
#version 430
layout(location = 0) in vec2 position_in;
layout(location = 1) in vec2 color_in;
layout(location = 0) smooth out vec2 color_out;

void main()
{
	gl_Position = vec4(position_in, 0, 1);
    color_out = color_in;
}
END

SHADER fragment frag_shader_ref GLSL
#version 430
layout(location = 0) smooth in vec2 color_in;
layout(location = 0) out lowp vec2 frag_out;
void main()
{
    frag_out = color_in;
}
END

BUFFER framebuffer0 FORMAT R16G16_SFLOAT
BUFFER framebuffer1 FORMAT R16G16_SFLOAT
BUFFER framebuffer2 FORMAT R16G16_SFLOAT

BUFFER ref0 FORMAT R16G16_SFLOAT
BUFFER ref1 FORMAT R16G16_SFLOAT
BUFFER ref2 FORMAT R16G16_SFLOAT

BUFFER position DATA_TYPE vec2<float> DATA
-1.0 -1.0
 1.0 -1.0
 1.0  1.0
-1.0  1.0
END

BUFFER color0 DATA_TYPE R16G16_SFLOAT DATA
1.0 0.0
0.0 1.0
0.0 0.0
1.0 1.0
END

BUFFER color1 DATA_TYPE R16G16_SFLOAT DATA
0.0 1.0
0.0 0.0
1.0 1.0
1.0 0.0
END

BUFFER color2 DATA_TYPE R16G16_SFLOAT DATA
0.0 0.0
1.0 1.0
1.0 0.0
0.0 1.0
END


PIPELINE graphics pipeline
  ATTACH vert_shader
  ATTACH frag_shader
  VERTEX_DATA position LOCATION 0
  VERTEX_DATA color0 LOCATION 1
  VERTEX_DATA color1 LOCATION 2
  VERTEX_DATA color2 LOCATION 3
  BIND BUFFER framebuffer0 AS color LOCATION 0
  BIND BUFFER framebuffer1 AS color LOCATION 1
  BIND BUFFER framebuffer2 AS color LOCATION 2
  FRAMEBUFFER_SIZE 60 60
END

PIPELINE graphics pipeline_ref0
  ATTACH vert_shader_ref
  ATTACH frag_shader_ref
  VERTEX_DATA position LOCATION 0
  VERTEX_DATA color0 LOCATION 1
  BIND BUFFER ref0 AS color LOCATION 0
  FRAMEBUFFER_SIZE 60 60
END

PIPELINE graphics pipeline_ref1
  ATTACH vert_shader_ref
  ATTACH frag_shader_ref
  VERTEX_DATA position LOCATION 0
  VERTEX_DATA color1 LOCATION 1
  BIND BUFFER ref1 AS color LOCATION 0
  FRAMEBUFFER_SIZE 60 60
END

PIPELINE graphics pipeline_ref2
  ATTACH vert_shader_ref
  ATTACH frag_shader_ref
  VERTEX_DATA position LOCATION 0
  VERTEX_DATA color2 LOCATION 1
  BIND BUFFER ref2 AS color LOCATION 0
  FRAMEBUFFER_SIZE 60 60
END

CLEAR_COLOR pipeline 0 0 0 0
CLEAR pipeline
RUN pipeline DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4
CLEAR_COLOR pipeline_ref0 0 0 0 0
CLEAR pipeline_ref0
RUN pipeline_ref0 DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4
CLEAR_COLOR pipeline_ref1 0 0 0 0
CLEAR pipeline_ref1
RUN pipeline_ref1 DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4
CLEAR_COLOR pipeline_ref2 0 0 0 0
CLEAR pipeline_ref2
RUN pipeline_ref2 DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4
EXPECT framebuffer0 EQ_BUFFER ref0
EXPECT framebuffer1 EQ_BUFFER ref1
EXPECT framebuffer2 EQ_BUFFER ref2