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#include <SFML/Graphics/Shader.hpp>
// Other 1st party headers
#include <SFML/System/Exception.hpp>
#include <SFML/System/FileInputStream.hpp>
#include <catch2/catch_test_macros.hpp>
#include <type_traits>
namespace
{
constexpr auto vertexSource = R"(
uniform vec2 storm_position;
uniform float storm_total_radius;
uniform float storm_inner_radius;
void main()
{
vec4 vertex = gl_ModelViewMatrix * gl_Vertex;
vec2 offset = vertex.xy - storm_position;
float len = length(offset);
if (len < storm_total_radius)
{
float push_distance = storm_inner_radius + len / storm_total_radius * (storm_total_radius - storm_inner_radius);
vertex.xy = storm_position + normalize(offset) * push_distance;
}
gl_Position = gl_ProjectionMatrix * vertex;
gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
gl_FrontColor = gl_Color;
}
)";
constexpr auto geometrySource = R"(
#version 150
// The render target's resolution (used for scaling)
uniform vec2 resolution;
// The billboards' size
uniform vec2 size;
// Input is the passed point cloud
layout (points) in;
// The output will consist of triangle strips with four vertices each
layout (triangle_strip, max_vertices = 4) out;
// Output texture coordinates
out vec2 tex_coord;
// Main entry point
void main()
{
// Calculate the half width/height of the billboards
vec2 half_size = size / 2.f;
// Scale the size based on resolution (1 would be full width/height)
half_size /= resolution;
// Iterate over all vertices
for (int i = 0; i < gl_in.length(); ++i)
{
// Retrieve the passed vertex position
vec2 pos = gl_in[i].gl_Position.xy;
// Bottom left vertex
gl_Position = vec4(pos - half_size, 0.f, 1.f);
tex_coord = vec2(1.f, 1.f);
EmitVertex();
// Bottom right vertex
gl_Position = vec4(pos.x + half_size.x, pos.y - half_size.y, 0.f, 1.f);
tex_coord = vec2(0.f, 1.f);
EmitVertex();
// Top left vertex
gl_Position = vec4(pos.x - half_size.x, pos.y + half_size.y, 0.f, 1.f);
tex_coord = vec2(1.f, 0.f);
EmitVertex();
// Top right vertex
gl_Position = vec4(pos + half_size, 0.f, 1.f);
tex_coord = vec2(0.f, 0.f);
EmitVertex();
// And finalize the primitive
EndPrimitive();
}
}
)";
constexpr auto fragmentSource = R"(
uniform sampler2D texture;
uniform float blink_alpha;
void main()
{
vec4 pixel = gl_Color;
pixel.a = blink_alpha;
gl_FragColor = pixel;
}
)";
#ifdef SFML_RUN_DISPLAY_TESTS
#ifdef SFML_OPENGL_ES
constexpr bool skipShaderDummyTest = false;
constexpr bool skipShaderFullTest = true;
#else
constexpr bool skipShaderDummyTest = true;
constexpr bool skipShaderFullTest = false;
#endif
#else
constexpr bool skipShaderDummyTest = true;
constexpr bool skipShaderFullTest = true;
#endif
std::string skipShaderDummyTests()
{
if constexpr (skipShaderDummyTest)
// https://github.com/catchorg/Catch2/blob/devel/docs/test-cases-and-sections.md#special-tags
// This tag tells Catch2 to not run a given TEST_CASE
return "[.shaderDummy]";
else
return "";
}
std::string skipShaderFullTests()
{
if constexpr (skipShaderFullTest)
// https://github.com/catchorg/Catch2/blob/devel/docs/test-cases-and-sections.md#special-tags
// This tag tells Catch2 to not run a given TEST_CASE
return "[.shaderFull]";
else
return "";
}
} // namespace
TEST_CASE("[Graphics] sf::Shader (Dummy Implementation)", skipShaderDummyTests())
{
SECTION("Available")
{
CHECK_FALSE(sf::Shader::isAvailable());
CHECK_FALSE(sf::Shader::isGeometryAvailable());
}
SECTION("Construct from memory")
{
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource), sf::Shader::Type::Vertex), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(geometrySource), sf::Shader::Type::Geometry), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(fragmentSource), sf::Shader::Type::Fragment), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource), std::string_view(fragmentSource)), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource),
std::string_view(geometrySource),
std::string_view(fragmentSource)),
sf::Exception);
}
SECTION("loadFromMemory()")
{
sf::Shader shader;
CHECK_FALSE(shader.loadFromMemory(vertexSource, sf::Shader::Type::Vertex));
CHECK_FALSE(shader.loadFromMemory(geometrySource, sf::Shader::Type::Geometry));
CHECK_FALSE(shader.loadFromMemory(fragmentSource, sf::Shader::Type::Fragment));
CHECK_FALSE(shader.loadFromMemory(vertexSource, fragmentSource));
CHECK_FALSE(shader.loadFromMemory(vertexSource, geometrySource, fragmentSource));
}
}
TEST_CASE("[Graphics] sf::Shader", skipShaderFullTests())
{
SECTION("Type traits")
{
STATIC_CHECK(!std::is_copy_constructible_v<sf::Shader>);
STATIC_CHECK(!std::is_copy_assignable_v<sf::Shader>);
STATIC_CHECK(std::is_nothrow_move_constructible_v<sf::Shader>);
STATIC_CHECK(std::is_nothrow_move_assignable_v<sf::Shader>);
}
SECTION("Construction")
{
SECTION("Default constructor")
{
const sf::Shader shader;
CHECK(shader.getNativeHandle() == 0);
}
SECTION("File")
{
SECTION("One shader")
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("does-not-exist.vert"), sf::Shader::Type::Vertex),
sf::Exception);
if (sf::Shader::isAvailable())
{
CHECK(sf::Shader(std::filesystem::path("Graphics/shader.vert"), sf::Shader::Type::Vertex).getNativeHandle() !=
0);
CHECK(sf::Shader(std::filesystem::path("Graphics/shader.frag"), sf::Shader::Type::Fragment)
.getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"), sf::Shader::Type::Vertex),
sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.frag"), sf::Shader::Type::Fragment),
sf::Exception);
}
}
SECTION("Two shaders")
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("does-not-exist.vert"),
std::filesystem::path("Graphics/shader.frag")),
sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("does-not-exist.frag")),
sf::Exception);
if (sf::Shader::isAvailable())
{
CHECK(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("Graphics/shader.frag"))
.getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("Graphics/shader.frag")),
sf::Exception);
}
}
SECTION("Three shaders")
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("does-not-exist.vert"),
std::filesystem::path("Graphics/shader.geom"),
std::filesystem::path("Graphics/shader.frag")),
sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("does-not-exist.geom"),
std::filesystem::path("Graphics/shader.frag")),
sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("Graphics/shader.geom"),
std::filesystem::path("does-not-exist.frag")),
sf::Exception);
if (sf::Shader::isGeometryAvailable())
{
CHECK(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("Graphics/shader.geom"),
std::filesystem::path("Graphics/shader.frag"))
.getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(std::filesystem::path("Graphics/shader.vert"),
std::filesystem::path("Graphics/shader.geom"),
std::filesystem::path("Graphics/shader.frag")),
sf::Exception);
}
}
}
SECTION("Memory")
{
if (sf::Shader::isAvailable())
{
CHECK(sf::Shader(std::string_view(vertexSource), sf::Shader::Type::Vertex).getNativeHandle() != 0);
CHECK_THROWS_AS(sf::Shader(std::string_view(geometrySource), sf::Shader::Type::Geometry), sf::Exception);
CHECK(sf::Shader(std::string_view(fragmentSource), sf::Shader::Type::Fragment).getNativeHandle() != 0);
CHECK(sf::Shader(std::string_view(vertexSource), std::string_view(fragmentSource)).getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource), sf::Shader::Type::Vertex), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(geometrySource), sf::Shader::Type::Geometry), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(fragmentSource), sf::Shader::Type::Fragment), sf::Exception);
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource), std::string_view(fragmentSource)), sf::Exception);
}
if (sf::Shader::isGeometryAvailable())
{
CHECK(sf::Shader(std::string_view(vertexSource), std::string_view(geometrySource), std::string_view(fragmentSource))
.getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(std::string_view(vertexSource),
std::string_view(geometrySource),
std::string_view(fragmentSource)),
sf::Exception);
}
}
SECTION("Stream")
{
sf::FileInputStream vertexShaderStream("Graphics/shader.vert");
sf::FileInputStream fragmentShaderStream("Graphics/shader.frag");
sf::FileInputStream geometryShaderStream("Graphics/shader.geom");
sf::FileInputStream emptyStream("Graphics/invalid_shader.vert");
SECTION("One shader")
{
CHECK_THROWS_AS(sf::Shader(emptyStream, sf::Shader::Type::Vertex), sf::Exception);
if (sf::Shader::isAvailable())
{
CHECK(sf::Shader(vertexShaderStream, sf::Shader::Type::Vertex).getNativeHandle() != 0);
CHECK(sf::Shader(fragmentShaderStream, sf::Shader::Type::Fragment).getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, sf::Shader::Type::Vertex), sf::Exception);
CHECK_THROWS_AS(sf::Shader(fragmentShaderStream, sf::Shader::Type::Fragment), sf::Exception);
}
}
SECTION("Two shaders")
{
CHECK_THROWS_AS(sf::Shader(emptyStream, fragmentShaderStream), sf::Exception);
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, emptyStream), sf::Exception);
if (sf::Shader::isAvailable())
{
CHECK(sf::Shader(vertexShaderStream, fragmentShaderStream).getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, fragmentShaderStream), sf::Exception);
}
}
SECTION("Three shaders")
{
CHECK_THROWS_AS(sf::Shader(emptyStream, geometryShaderStream, fragmentShaderStream), sf::Exception);
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, emptyStream, fragmentShaderStream), sf::Exception);
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, geometryShaderStream, emptyStream), sf::Exception);
if (sf::Shader::isGeometryAvailable())
{
CHECK(sf::Shader(vertexShaderStream, geometryShaderStream, fragmentShaderStream).getNativeHandle() != 0);
}
else
{
CHECK_THROWS_AS(sf::Shader(vertexShaderStream, geometryShaderStream, fragmentShaderStream),
sf::Exception);
}
}
}
}
SECTION("Move semantics")
{
SECTION("Construction")
{
sf::Shader movedShader;
const sf::Shader shader = std::move(movedShader);
CHECK(shader.getNativeHandle() == 0);
}
SECTION("Assignment")
{
sf::Shader movedShader;
sf::Shader shader;
shader = std::move(movedShader);
CHECK(shader.getNativeHandle() == 0);
}
}
SECTION("Move semantics (create)")
{
SECTION("Construction")
{
sf::Shader movedShader(std::filesystem::path("Graphics/shader.vert"), sf::Shader::Type::Vertex);
const sf::Shader shader = std::move(movedShader);
CHECK(shader.getNativeHandle() != 0);
}
SECTION("Assignment")
{
sf::Shader movedShader(std::filesystem::path("Graphics/shader.vert"), sf::Shader::Type::Vertex);
sf::Shader shader(std::filesystem::path("Graphics/shader.frag"), sf::Shader::Type::Fragment);
shader = std::move(movedShader);
CHECK(shader.getNativeHandle() != 0);
}
}
SECTION("loadFromFile()")
{
sf::Shader shader;
SECTION("One shader")
{
CHECK(!shader.loadFromFile("does-not-exist.vert", sf::Shader::Type::Vertex));
CHECK(shader.loadFromFile("Graphics/shader.vert", sf::Shader::Type::Vertex) == sf::Shader::isAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isAvailable());
CHECK(shader.loadFromFile("Graphics/shader.frag", sf::Shader::Type::Fragment) == sf::Shader::isAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isAvailable());
}
SECTION("Two shaders")
{
CHECK(!shader.loadFromFile("does-not-exist.vert", "Graphics/shader.frag"));
CHECK(!shader.loadFromFile("Graphics/shader.vert", "does-not-exist.frag"));
CHECK(shader.loadFromFile("Graphics/shader.vert", "Graphics/shader.frag") == sf::Shader::isAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isAvailable());
}
SECTION("Three shaders")
{
CHECK(!shader.loadFromFile("does-not-exist.vert", "Graphics/shader.geom", "Graphics/shader.frag"));
CHECK(!shader.loadFromFile("Graphics/shader.vert", "does-not-exist.geom", "Graphics/shader.frag"));
CHECK(!shader.loadFromFile("Graphics/shader.vert", "Graphics/shader.geom", "does-not-exist.frag"));
CHECK(shader.loadFromFile("Graphics/shader.vert", "Graphics/shader.geom", "Graphics/shader.frag") ==
sf::Shader::isGeometryAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isGeometryAvailable());
}
}
SECTION("loadFromMemory()")
{
sf::Shader shader;
CHECK(shader.loadFromMemory(vertexSource, sf::Shader::Type::Vertex) == sf::Shader::isAvailable());
CHECK(!shader.loadFromMemory(geometrySource, sf::Shader::Type::Geometry));
CHECK(shader.loadFromMemory(fragmentSource, sf::Shader::Type::Fragment) == sf::Shader::isAvailable());
CHECK(shader.loadFromMemory(vertexSource, fragmentSource) == sf::Shader::isAvailable());
CHECK(shader.loadFromMemory(vertexSource, geometrySource, fragmentSource) == sf::Shader::isGeometryAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isAvailable());
}
SECTION("loadFromStream()")
{
sf::Shader shader;
sf::FileInputStream vertexShaderStream;
REQUIRE(vertexShaderStream.open("Graphics/shader.vert"));
sf::FileInputStream fragmentShaderStream;
REQUIRE(fragmentShaderStream.open("Graphics/shader.frag"));
sf::FileInputStream geometryShaderStream;
REQUIRE(geometryShaderStream.open("Graphics/shader.geom"));
sf::FileInputStream emptyStream;
SECTION("One shader")
{
REQUIRE(!shader.loadFromStream(emptyStream, sf::Shader::Type::Vertex));
REQUIRE(shader.loadFromStream(vertexShaderStream, sf::Shader::Type::Vertex) == sf::Shader::isAvailable());
REQUIRE(shader.loadFromStream(fragmentShaderStream, sf::Shader::Type::Fragment) == sf::Shader::isAvailable());
}
SECTION("Two shaders")
{
REQUIRE(!shader.loadFromStream(emptyStream, fragmentShaderStream));
REQUIRE(!shader.loadFromStream(vertexShaderStream, emptyStream));
REQUIRE(shader.loadFromStream(vertexShaderStream, fragmentShaderStream) == sf::Shader::isAvailable());
}
SECTION("Three shaders")
{
REQUIRE(!shader.loadFromStream(emptyStream, geometryShaderStream, fragmentShaderStream));
REQUIRE(!shader.loadFromStream(vertexShaderStream, emptyStream, fragmentShaderStream));
REQUIRE(!shader.loadFromStream(vertexShaderStream, geometryShaderStream, emptyStream));
REQUIRE(shader.loadFromStream(vertexShaderStream, geometryShaderStream, fragmentShaderStream) ==
sf::Shader::isGeometryAvailable());
CHECK(static_cast<bool>(shader.getNativeHandle()) == sf::Shader::isGeometryAvailable());
}
}
}
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