chromium/third_party/angle/src/tests/gl_tests/PointSpritesTest.cpp

//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// Some of the pointsprite tests below were ported from Khronos WebGL
// conformance test suite.

#include "test_utils/ANGLETest.h"
#include "test_utils/gl_raii.h"

#include <cmath>

usingnamespaceangle;

constexpr char kVertexShaderSource[] = …;

constexpr GLfloat kMinMaxPointSize = …;

class PointSpritesTest : public ANGLETest<>
{ … };

// Checks gl_PointCoord and gl_PointSize
// https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/variables/gl-pointcoord.html
TEST_P(PointSpritesTest, PointCoordAndPointSizeCompliance)
{ … }

// Checks gl_PointCoord and gl_PointSize, but use the gl_PointCoord inside a function.
// In Vulkan, we need to inject some code into the shader to flip the Y coordinate, and we
// need to make sure this code injection works even if someone uses gl_PointCoord outside the
// main function.
TEST_P(PointSpritesTest, UsingPointCoordInsideFunction)
{ … }

// Verify that drawing a point without enabling any attributes succeeds
// https://www.khronos.org/registry/webgl/sdk/tests/conformance/rendering/point-no-attributes.html
TEST_P(PointSpritesTest, PointWithoutAttributesCompliance)
{ … }

// This is a regression test for a graphics driver bug affecting end caps on roads in MapsGL
// https://www.khronos.org/registry/webgl/sdk/tests/conformance/rendering/point-with-gl-pointcoord-in-fragment-shader.html
TEST_P(PointSpritesTest, PointCoordRegressionTest)
{ … }

// Verify GL_VERTEX_PROGRAM_POINT_SIZE is enabled
// https://www.khronos.org/registry/webgl/sdk/tests/conformance/rendering/point-size.html
TEST_P(PointSpritesTest, PointSizeEnabledCompliance)
{ … }

// Verify that rendering works correctly when gl_PointSize is declared in a shader but isn't used
TEST_P(PointSpritesTest, PointSizeDeclaredButUnused)
{ … }

// Test to cover a bug where the D3D11 rasterizer state would not be update when switching between
// draw types.  This causes the cull face to potentially be incorrect when drawing emulated point
// spites.
TEST_P(PointSpritesTest, PointSpriteAlternatingDrawTypes)
{ … }

// This checks for an NVIDIA driver bug where points larger than the maximum reported point size can
// be drawn. Point size should be clamped to the point size range as specified in GLES 3.0.5 section
// 3.4.
TEST_P(PointSpritesTest, PointSizeAboveMaxIsClamped)
{ … }

// Use this to select which configurations (e.g. which renderer, which GLES
// major version) these tests should be run against.
//
// We test on D3D11 9_3 because the existing D3D11 PointSprite implementation
// uses Geometry Shaders which are not supported for 9_3.
// D3D9 and D3D11 are also tested to ensure no regressions.
ANGLE_INSTANTIATE_TEST_ES2_AND(…);