tests/cases/multisample_resolve.amber

#!amber
# Copyright 2021 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 sampleRateShading

SHADER vertex vert_shader PASSTHROUGH

SHADER fragment frag_shader GLSL
#version 440
layout(location = 0) out vec4 color;

void main (void)
{
    if (gl_SampleID == 0)
        color = vec4(1, 0, 0, 1);
    else if (gl_SampleID == 1)
        color = vec4(0, 1, 0, 1);
    else if (gl_SampleID == 2)
        color = vec4(0, 0, 1, 1);
    else 
        color = vec4(1, 1, 1, 1);
}
END

IMAGE framebuffer_ms FORMAT R8G8B8A8_UNORM DIM_2D WIDTH 64 HEIGHT 64 SAMPLES 4
IMAGE framebuffer FORMAT R8G8B8A8_UNORM DIM_2D WIDTH 64 HEIGHT 64

PIPELINE graphics pipeline
  ATTACH vert_shader
  ATTACH frag_shader
  FRAMEBUFFER_SIZE 64 64
  BIND BUFFER framebuffer_ms AS color LOCATION 0
  BIND BUFFER framebuffer AS resolve
END

RUN pipeline DRAW_RECT POS 0 0 SIZE 64 64

EXPECT framebuffer IDX 0 0 SIZE 64 64 EQ_RGBA 128 128 128 255 TOLERANCE 5%