buffer_emd.amber

#!amber
#
# Copyright 2019 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 vtex_shader GLSL
#version 430

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

layout(set = 0, binding = 0) readonly buffer block1 {
  vec4 in_color;
};

void main() {
  gl_Position = position;
  frag_color = vec4(0.25, 0.5, 0.75, 1.0);
}
END

SHADER fragment frag_shader GLSL
#version 430

layout(location = 0) in vec4 frag_color;
layout(location = 0) out vec4 final_color;

void main() {
  final_color = frag_color;
}
END

BUFFER frame1 FORMAT B8G8R8A8_UNORM
BUFFER frame2 FORMAT B8G8R8A8_UNORM

PIPELINE graphics pipeline1
  ATTACH vtex_shader
  ATTACH frag_shader

  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER frame1 AS color LOCATION 0
END

PIPELINE graphics pipeline2
  ATTACH vtex_shader
  ATTACH frag_shader

  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER frame2 AS color LOCATION 0
END

CLEAR pipeline1
CLEAR pipeline2
# Draw a rect to different parts of the frame buffers.
# Histograms will still match.
RUN pipeline1 DRAW_RECT POS   0   0 SIZE 128 128
RUN pipeline2 DRAW_RECT POS   128 128 SIZE 128 128

EXPECT frame1 EQ_HISTOGRAM_EMD_BUFFER frame2 TOLERANCE 0.1