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# Test that Z runs lates when the fragment shader contains stores.
#
[require]
GL >= 3.3
GLSL >= 3.30
GL_ARB_shader_image_load_store
SIZE 256 256
depthbuffer
[vertex shader]
#version 130
in vec4 piglit_vertex;
void main()
{
gl_Position = piglit_vertex;
gl_Position.z = 1.0;
}
[fragment shader]
#version 330
#extension GL_ARB_shader_image_load_store: enable
uniform int read;
uniform vec4 in_color;
layout(rgba8) uniform image2D img;
out vec4 outcolor;
void main()
{
vec4 color;
if (read != 0) {
color = imageLoad(img, ivec2(gl_FragCoord));
} else {
color = in_color;
imageStore(img, ivec2(gl_FragCoord), color);
}
outcolor = color;
}
[test]
texture rgbw 0 (256, 256) GL_RGBA8
uniform int img 0
image texture 0 GL_RGBA8
# Clear framebuffer
clear color 1.0 0.0 0.0 1.0
clear depth 0.0
clear
# Clear texture
uniform int read 0
uniform vec4 in_color 0.0 0.0 1.0 1.0
draw rect -1 -1 2 2
probe all rgba 0.0 0.0 1.0 1.0
memory barrier GL_SHADER_IMAGE_ACCESS_BARRIER_BIT
# Check that Z test kills pixels
uniform vec4 in_color 1.0 1.0 0.0 1.0
enable GL_DEPTH_TEST
draw rect -1 -1 2 2
probe all rgba 0.0 0.0 1.0 1.0
memory barrier GL_SHADER_IMAGE_ACCESS_BARRIER_BIT
# Check that the texture was still modified
disable GL_DEPTH_TEST
uniform int read 1
uniform vec4 in_color 0.0 0.0 0.0 0.0
draw rect -1 -1 2 2
probe all rgba 1.0 1.0 0.0 1.0
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