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Diffstat (limited to 'tests/cases/multiple_samplers.amber')
| -rw-r--r-- | tests/cases/multiple_samplers.amber | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tests/cases/multiple_samplers.amber b/tests/cases/multiple_samplers.amber new file mode 100644 index 0000000..dd37e8e --- /dev/null +++ b/tests/cases/multiple_samplers.amber @@ -0,0 +1,126 @@ +#!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_red GLSL +#version 430 +layout(location = 0) out vec4 color_out; +void main() { + color_out = vec4(1.0, 0.0, 0.0, 1.0); +} +END + +SHADER vertex vert_shader_tex GLSL +#version 430 +layout(location = 0) in vec4 position; +layout(location = 1) in vec2 texcoords_in; +layout(location = 0) out vec2 texcoords_out; +void main() { + gl_Position = position; + texcoords_out = texcoords_in; +} +END + +SHADER fragment frag_shader_tex GLSL +#version 430 +layout(location = 0) in vec2 texcoords_in; +layout(location = 0) out vec4 color_out; +uniform layout(set=0, binding=0) sampler2D tex_sampler_white; +uniform layout(set=0, binding=1) sampler2D tex_sampler_black; +void main() { + // Use a sampler with a white border color for the right + // side of the color buffer and a sampler with a black + // border color for the left side. + if (gl_FragCoord.x > 128.0) + color_out = texture(tex_sampler_white, texcoords_in); + else + color_out = texture(tex_sampler_black, texcoords_in); +} +END + +BUFFER texture FORMAT R8G8B8A8_UNORM +BUFFER framebuffer FORMAT B8G8R8A8_UNORM + +# A sampler that generates white when texture coordinates +# go out of range [0..1]. +SAMPLER sampler_white \ + ADDRESS_MODE_U clamp_to_border \ + ADDRESS_MODE_V clamp_to_border \ + BORDER_COLOR float_opaque_white + +# A sampler that generates black when texture coordinates +# go out of range [0..1]. +SAMPLER sampler_black \ + ADDRESS_MODE_U clamp_to_border \ + ADDRESS_MODE_V clamp_to_border \ + BORDER_COLOR float_opaque_black + +BUFFER position DATA_TYPE vec2<float> DATA +-0.75 -0.75 + 0.75 -0.75 + 0.75 0.75 +-0.75 0.75 +END +BUFFER texcoords DATA_TYPE vec2<float> DATA +-0.5 -0.5 + 1.5 -0.5 + 1.5 1.5 +-0.5 1.5 +END + +# A pipeline for generating a texture. Renders pure red. +PIPELINE graphics texgen + ATTACH vert_shader + ATTACH frag_shader_red + FRAMEBUFFER_SIZE 256 256 + BIND BUFFER texture AS color LOCATION 0 +END + +# A pipeline for drawing a textured quad using two samplers. +PIPELINE graphics pipeline + ATTACH vert_shader_tex + ATTACH frag_shader_tex + BIND BUFFER texture AS combined_image_sampler SAMPLER sampler_white DESCRIPTOR_SET 0 BINDING 0 + BIND BUFFER texture AS combined_image_sampler SAMPLER sampler_black DESCRIPTOR_SET 0 BINDING 1 + VERTEX_DATA position LOCATION 0 + VERTEX_DATA texcoords LOCATION 1 + FRAMEBUFFER_SIZE 256 256 + BIND BUFFER framebuffer AS color LOCATION 0 +END + +# Generate a texture with a blue background and red quad at the lower right corner. +CLEAR_COLOR texgen 0 0 255 255 +CLEAR texgen +RUN texgen DRAW_RECT POS 128 128 SIZE 128 128 + +# Clear to green and draw the generated texture in the center of the screen leaving +# the background color to the edges. Use texture coordinates that go past the [0..1] +# range to show border colors. The left side of the texture is using a sampler with +# a black border, and the right side uses a sampler with a white border. +CLEAR_COLOR pipeline 0 255 0 255 +CLEAR pipeline +RUN pipeline DRAW_ARRAY AS TRIANGLE_FAN START_IDX 0 COUNT 4 + +# Check for the green background. +EXPECT framebuffer IDX 1 1 SIZE 1 1 EQ_RGBA 0 255 0 255 +# Check for the black border color. +EXPECT framebuffer IDX 55 55 SIZE 1 1 EQ_RGBA 0 0 0 255 +# Check for the blue part of the texture. +EXPECT framebuffer IDX 105 105 SIZE 1 1 EQ_RGBA 0 0 255 255 +# Check for the red part of the texture. +EXPECT framebuffer IDX 150 150 SIZE 1 1 EQ_RGBA 255 0 0 255 +# Check for the white border color. +EXPECT framebuffer IDX 200 200 SIZE 1 1 EQ_RGBA 255 255 255 255 |