# 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.

[require]
depthstencil D32_SFLOAT_S8_UINT

[vertex shader]
#version 430

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

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

[fragment shader]
#version 430

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

void main() {
  final_color = frag_color;
}

[vertex data]
#        position     vert_color
     0/R8G8B8A8_SNORM 1/R8G8B8A8_UNORM

#             Red for entire frame
#        R8   G8 B8  A8     R8   G8  B8 A8
       -128 -128  3  127    255   0   0  0
        127  127  3  127    255   0   0  0
       -128  127  3  127    255   0   0  0
       -128 -128  3  127    255   0   0  0
        127  127  3  127    255   0   0  0
        127 -128  3  127    255   0   0  0

#             Green for half frame
          0 -128  2  127      0 255   0  0
        127  127  2  127      0 255   0  0
          0  127  2  127      0 255   0  0
          0 -128  2  127      0 255   0  0
        127  127  2  127      0 255   0  0
        127 -128  2  127      0 255   0  0

#           Blue for quarter frame
       -128    0  1  127      0   0 255   0
          0  127  1  127      0   0 255   0
       -128  127  1  127      0   0 255   0
       -128    0  1  127      0   0 255   0
          0  127  1  127      0   0 255   0
          0    0  1  127      0   0 255   0

#         Mixed color for quarter frame
          0    0  0  127    127 127 127   0
        127  127  0  127    127 127 127   0
          0  127  0  127    127 127 127   0
          0    0  0  127    127 127 127   0
        127  127  0  127    127 127 127   0
        127    0  0  127    127 127 127   0

[test]
clear
clear depth 127
depthTestEnable true
depthWriteEnable true
depthCompareOp VK_COMPARE_OP_LESS

# Note that the rectangle drawn by the last command fully contains
# the one drawn by the former command. However, the rectangle drawn
# by the former command is shown in the final frame buffer because
# of depth comparison based on depth buffer.
draw arrays TRIANGLE_LIST 18 6
draw arrays TRIANGLE_LIST 12 6
draw arrays TRIANGLE_LIST 6 6
draw arrays TRIANGLE_LIST 0 6

# The final frame buffer shows all red, green, blue, and mixed color.
relative probe rect rgba (0.0, 0.0, 0.5, 0.5) (1.0, 0, 0, 0)
relative probe rect rgba (0.5, 0.0, 0.5, 0.5) (0, 1.0, 0, 0)
relative probe rect rgba (0.0, 0.5, 0.5, 0.5) (0, 0, 1.0, 0)
relative probe rect rgba (0.5, 0.5, 0.5, 0.5) (0.5, 0.5, 0.5, 0)