#!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 PASSTHROUGH
SHADER fragment frag_shader GLSL
#version 430
layout(location = 0) out vec4 color_out;
uniform layout(set=0, binding=0) samplerBuffer texels;

void main()
{
    color_out = texelFetch(texels, int(gl_FragCoord.x) % 4);
}
END

BUFFER texel_buffer DATA_TYPE R8G8B8A8_UNORM DATA
255   0   0 255
  0 255   0 255
  0   0 255 255
  0 255 255 255
END

BUFFER framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics pipeline
  ATTACH vert_shader
  ATTACH frag_shader
  BIND BUFFER texel_buffer AS uniform_texel_buffer DESCRIPTOR_SET 0 BINDING 0
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER framebuffer AS color LOCATION 0
END

CLEAR_COLOR pipeline 0 0 255 255
CLEAR pipeline
RUN pipeline DRAW_RECT POS 50 50 SIZE 100 100

EXPECT framebuffer IDX 50 50 SIZE 1 100 EQ_RGBA   0   0 255 255
EXPECT framebuffer IDX 51 50 SIZE 1 100 EQ_RGBA   0 255 255 255
EXPECT framebuffer IDX 52 50 SIZE 1 100 EQ_RGBA 255   0   0 255
EXPECT framebuffer IDX 53 50 SIZE 1 100 EQ_RGBA   0 255   0 255
EXPECT framebuffer IDX 54 50 SIZE 1 100 EQ_RGBA   0   0 255 255
EXPECT framebuffer IDX 55 50 SIZE 1 100 EQ_RGBA   0 255 255 255
EXPECT framebuffer IDX 56 50 SIZE 1 100 EQ_RGBA 255   0   0 255
EXPECT framebuffer IDX 57 50 SIZE 1 100 EQ_RGBA   0 255   0 255