src/third_party/angle/src/tests/gl_tests/LinkAndRelinkTest.cpp - cobalt - Git at Google

 //
 // Copyright 2017 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.
 //
 // LinkAndRelinkFailureTest:
 //   Link and relink failure tests for rendering pipeline and compute pipeline.

 #include <vector>
 #include "test_utils/ANGLETest.h"
 #include "test_utils/gl_raii.h"

 using namespace angle;

 namespace
 {

 class LinkAndRelinkTest : public ANGLETest
 {
   protected:
     LinkAndRelinkTest() {}
 };

 class LinkAndRelinkTestES31 : public ANGLETest
 {
   protected:
     LinkAndRelinkTestES31() {}
 };

 // When a program link or relink fails, if you try to install the unsuccessfully
 // linked program (via UseProgram) and start rendering or dispatch compute,
 // We can not always report INVALID_OPERATION for rendering/compute pipeline.
 // The result depends on the previous state: Whether a valid program is
 // installed in current GL state before the link.
 // If a program successfully relinks when it is in use, the program might
 // change from a rendering program to a compute program in theory,
 // or vice versa.

 // When program link fails and no valid rendering program is installed in the GL
 // state before the link, it should report an error for UseProgram and
 // DrawArrays/DrawElements.
 TEST_P(LinkAndRelinkTest, RenderingProgramFailsWithoutProgramInstalled)
 {
     glUseProgram(0);
     GLuint program = glCreateProgram();

     glLinkProgram(program);
     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);

     glUseProgram(program);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 // When program link or relink fails and a valid rendering program is installed
 // in the GL state before the link, using the failed program via UseProgram
 // should report an error, but starting rendering should succeed.
 // However, dispatching compute always fails.
 TEST_P(LinkAndRelinkTest, RenderingProgramFailsWithProgramInstalled)
 {
     // Install a render program in current GL state via UseProgram, then render.
     // It should succeed.
     constexpr char kVS[] = "void main() {}";
     constexpr char kFS[] = "void main() {}";

     GLuint program = glCreateProgram();

     GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
     GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);

     EXPECT_NE(0u, vs);
     EXPECT_NE(0u, fs);

     glAttachShader(program, vs);
     glDeleteShader(vs);

     glAttachShader(program, fs);
     glDeleteShader(fs);

     glLinkProgram(program);

     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glUseProgram(program);
     EXPECT_GL_NO_ERROR();
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Link failure, and a valid program has been installed in the GL state.
     GLuint programNull = glCreateProgram();

     glLinkProgram(programNull);
     glGetProgramiv(programNull, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);

     // Starting rendering should succeed.
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully linked program should report an error.
     glUseProgram(programNull);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully linked program, that program should not
     // replace the program binary residing in the GL state. It will not make
     // the installed program invalid either, like what UseProgram(0) can do.
     // So, starting rendering should succeed.
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // We try to relink the installed program, but make it fail.

     // No vertex shader, relink fails.
     glDetachShader(program, vs);
     glLinkProgram(program);
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);
     EXPECT_GL_NO_ERROR();

     // Starting rendering should succeed.
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully relinked program should report an error.
     glUseProgram(program);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully relinked program, that program should not
     // replace the program binary residing in the GL state. It will not make
     // the installed program invalid either, like what UseProgram(0) can do.
     // So, starting rendering should succeed.
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 // Tests uniform default values.
 TEST_P(LinkAndRelinkTest, UniformDefaultValues)
 {
     // TODO(anglebug.com/3969): Understand why rectangle texture CLs made this fail.
     ANGLE_SKIP_TEST_IF(IsOzone() && IsIntel());
     constexpr char kFS[] = R"(precision mediump float;
 uniform vec4 u_uniform;

 bool isZero(vec4 value) {
     return value == vec4(0,0,0,0);
 }

 void main()
 {
     gl_FragColor = isZero(u_uniform) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
 })";

     ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), kFS);
     glUseProgram(program);

     drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
     ASSERT_GL_NO_ERROR();
     EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

     GLint loc = glGetUniformLocation(program, "u_uniform");
     ASSERT_NE(-1, loc);
     glUniform4f(loc, 0.1f, 0.2f, 0.3f, 0.4f);

     drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
     ASSERT_GL_NO_ERROR();
     EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

     glLinkProgram(program);
     ASSERT_GL_NO_ERROR();

     drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
     ASSERT_GL_NO_ERROR();
     EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
 }

 // When program link fails and no valid compute program is installed in the GL
 // state before the link, it should report an error for UseProgram and
 // DispatchCompute.
 TEST_P(LinkAndRelinkTestES31, ComputeProgramFailsWithoutProgramInstalled)
 {
     glUseProgram(0);
     GLuint program = glCreateProgram();

     glLinkProgram(program);
     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);

     glUseProgram(program);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 // When program link or relink fails and a valid compute program is installed in
 // the GL state before the link, using the failed program via UseProgram should
 // report an error, but dispatching compute should succeed.
 // However, starting rendering always fails.
 TEST_P(LinkAndRelinkTestES31, ComputeProgramFailsWithProgramInstalled)
 {
     // Install a compute program in the GL state via UseProgram, then dispatch
     // compute. It should succeed.
     constexpr char kCS[] =
         R"(#version 310 es
         layout(local_size_x=1) in;
         void main()
         {
         })";

     GLuint program = glCreateProgram();

     GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
     EXPECT_NE(0u, cs);

     glAttachShader(program, cs);
     glDeleteShader(cs);

     glLinkProgram(program);
     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glUseProgram(program);
     EXPECT_GL_NO_ERROR();
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Link failure, and a valid program has been installed in the GL state.
     GLuint programNull = glCreateProgram();

     glLinkProgram(programNull);
     glGetProgramiv(programNull, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);

     // Dispatching compute should succeed.
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully linked program should report an error.
     glUseProgram(programNull);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully linked program, that program should not
     // replace the program binary residing in the GL state. It will not make
     // the installed program invalid either, like what UseProgram(0) can do.
     // So, dispatching compute should succeed.
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // We try to relink the installed program, but make it fail.

     // No compute shader, relink fails.
     glDetachShader(program, cs);
     glLinkProgram(program);
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_FALSE(linkStatus);
     EXPECT_GL_NO_ERROR();

     // Dispatching compute should succeed.
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully relinked program should report an error.
     glUseProgram(program);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     // Using the unsuccessfully relinked program, that program should not
     // replace the program binary residing in the GL state. It will not make
     // the installed program invalid either, like what UseProgram(0) can do.
     // So, dispatching compute should succeed.
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 // If you compile and link a compute program successfully and use the program,
 // then dispatching compute can succeed, while starting rendering will fail.
 // If you relink the compute program to a rendering program when it is in use,
 // then dispatching compute will fail, but starting rendering can succeed.
 TEST_P(LinkAndRelinkTestES31, RelinkProgramSucceedsFromComputeToRendering)
 {
     constexpr char kCS[] = R"(#version 310 es
 layout(local_size_x=1) in;
 void main()
 {
 })";

     GLuint program = glCreateProgram();

     GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
     EXPECT_NE(0u, cs);

     glAttachShader(program, cs);
     glDeleteShader(cs);

     glLinkProgram(program);
     glDetachShader(program, cs);
     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glUseProgram(program);
     EXPECT_GL_NO_ERROR();
     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     constexpr char kVS[] = "void main() {}";
     constexpr char kFS[] = "void main() {}";

     GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
     GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);
     EXPECT_NE(0u, vs);
     EXPECT_NE(0u, fs);

     glAttachShader(program, vs);
     glDeleteShader(vs);

     glAttachShader(program, fs);
     glDeleteShader(fs);

     glLinkProgram(program);
     glDetachShader(program, vs);
     glDetachShader(program, fs);
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 // If you compile and link a rendering program successfully and use the program,
 // then starting rendering can succeed, while dispatching compute will fail.
 // If you relink the rendering program to a compute program when it is in use,
 // then starting rendering will fail, but dispatching compute can succeed.
 TEST_P(LinkAndRelinkTestES31, RelinkProgramSucceedsFromRenderingToCompute)
 {
     constexpr char kVS[] = "void main() {}";
     constexpr char kFS[] = "void main() {}";

     GLuint program = glCreateProgram();

     GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
     GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);

     EXPECT_NE(0u, vs);
     EXPECT_NE(0u, fs);

     glAttachShader(program, vs);
     glDeleteShader(vs);

     glAttachShader(program, fs);
     glDeleteShader(fs);

     glLinkProgram(program);
     glDetachShader(program, vs);
     glDetachShader(program, fs);
     GLint linkStatus;
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glUseProgram(program);
     EXPECT_GL_NO_ERROR();
     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);

     constexpr char kCS[] = R"(#version 310 es
 layout(local_size_x=1) in;
 void main()
 {
 })";

     GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
     EXPECT_NE(0u, cs);

     glAttachShader(program, cs);
     glDeleteShader(cs);

     glLinkProgram(program);
     glDetachShader(program, cs);
     glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
     EXPECT_GL_TRUE(linkStatus);

     EXPECT_GL_NO_ERROR();

     glDispatchCompute(8, 4, 2);
     EXPECT_GL_NO_ERROR();

     glDrawArrays(GL_POINTS, 0, 1);
     EXPECT_GL_ERROR(GL_INVALID_OPERATION);
 }

 ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(LinkAndRelinkTest);
 ANGLE_INSTANTIATE_TEST_ES31(LinkAndRelinkTestES31);

 }  // namespace
	//
	// Copyright 2017 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.
	//
	// LinkAndRelinkFailureTest:
	// Link and relink failure tests for rendering pipeline and compute pipeline.

	#include <vector>
	#include "test_utils/ANGLETest.h"
	#include "test_utils/gl_raii.h"

	using namespace angle;

	namespace
	{

	class LinkAndRelinkTest : public ANGLETest
	{
	protected:
	LinkAndRelinkTest() {}
	};

	class LinkAndRelinkTestES31 : public ANGLETest
	{
	protected:
	LinkAndRelinkTestES31() {}
	};

	// When a program link or relink fails, if you try to install the unsuccessfully
	// linked program (via UseProgram) and start rendering or dispatch compute,
	// We can not always report INVALID_OPERATION for rendering/compute pipeline.
	// The result depends on the previous state: Whether a valid program is
	// installed in current GL state before the link.
	// If a program successfully relinks when it is in use, the program might
	// change from a rendering program to a compute program in theory,
	// or vice versa.

	// When program link fails and no valid rendering program is installed in the GL
	// state before the link, it should report an error for UseProgram and
	// DrawArrays/DrawElements.
	TEST_P(LinkAndRelinkTest, RenderingProgramFailsWithoutProgramInstalled)
	{
	glUseProgram(0);
	GLuint program = glCreateProgram();

	glLinkProgram(program);
	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);

	glUseProgram(program);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	// When program link or relink fails and a valid rendering program is installed
	// in the GL state before the link, using the failed program via UseProgram
	// should report an error, but starting rendering should succeed.
	// However, dispatching compute always fails.
	TEST_P(LinkAndRelinkTest, RenderingProgramFailsWithProgramInstalled)
	{
	// Install a render program in current GL state via UseProgram, then render.
	// It should succeed.
	constexpr char kVS[] = "void main() {}";
	constexpr char kFS[] = "void main() {}";

	GLuint program = glCreateProgram();

	GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
	GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);

	EXPECT_NE(0u, vs);
	EXPECT_NE(0u, fs);

	glAttachShader(program, vs);
	glDeleteShader(vs);

	glAttachShader(program, fs);
	glDeleteShader(fs);

	glLinkProgram(program);

	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glUseProgram(program);
	EXPECT_GL_NO_ERROR();
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Link failure, and a valid program has been installed in the GL state.
	GLuint programNull = glCreateProgram();

	glLinkProgram(programNull);
	glGetProgramiv(programNull, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);

	// Starting rendering should succeed.
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully linked program should report an error.
	glUseProgram(programNull);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully linked program, that program should not
	// replace the program binary residing in the GL state. It will not make
	// the installed program invalid either, like what UseProgram(0) can do.
	// So, starting rendering should succeed.
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// We try to relink the installed program, but make it fail.

	// No vertex shader, relink fails.
	glDetachShader(program, vs);
	glLinkProgram(program);
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);
	EXPECT_GL_NO_ERROR();

	// Starting rendering should succeed.
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully relinked program should report an error.
	glUseProgram(program);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully relinked program, that program should not
	// replace the program binary residing in the GL state. It will not make
	// the installed program invalid either, like what UseProgram(0) can do.
	// So, starting rendering should succeed.
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	// Tests uniform default values.
	TEST_P(LinkAndRelinkTest, UniformDefaultValues)
	{
	// TODO(anglebug.com/3969): Understand why rectangle texture CLs made this fail.
	ANGLE_SKIP_TEST_IF(IsOzone() && IsIntel());
	constexpr char kFS[] = R"(precision mediump float;
	uniform vec4 u_uniform;

	bool isZero(vec4 value) {
	return value == vec4(0,0,0,0);
	}

	void main()
	{
	gl_FragColor = isZero(u_uniform) ? vec4(0, 1, 0, 1) : vec4(1, 0, 0, 1);
	})";

	ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), kFS);
	glUseProgram(program);

	drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
	ASSERT_GL_NO_ERROR();
	EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

	GLint loc = glGetUniformLocation(program, "u_uniform");
	ASSERT_NE(-1, loc);
	glUniform4f(loc, 0.1f, 0.2f, 0.3f, 0.4f);

	drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
	ASSERT_GL_NO_ERROR();
	EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

	glLinkProgram(program);
	ASSERT_GL_NO_ERROR();

	drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f, 1.0f, true);
	ASSERT_GL_NO_ERROR();
	EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
	}

	// When program link fails and no valid compute program is installed in the GL
	// state before the link, it should report an error for UseProgram and
	// DispatchCompute.
	TEST_P(LinkAndRelinkTestES31, ComputeProgramFailsWithoutProgramInstalled)
	{
	glUseProgram(0);
	GLuint program = glCreateProgram();

	glLinkProgram(program);
	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);

	glUseProgram(program);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	// When program link or relink fails and a valid compute program is installed in
	// the GL state before the link, using the failed program via UseProgram should
	// report an error, but dispatching compute should succeed.
	// However, starting rendering always fails.
	TEST_P(LinkAndRelinkTestES31, ComputeProgramFailsWithProgramInstalled)
	{
	// Install a compute program in the GL state via UseProgram, then dispatch
	// compute. It should succeed.
	constexpr char kCS[] =
	R"(#version 310 es
	layout(local_size_x=1) in;
	void main()
	{
	})";

	GLuint program = glCreateProgram();

	GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
	EXPECT_NE(0u, cs);

	glAttachShader(program, cs);
	glDeleteShader(cs);

	glLinkProgram(program);
	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glUseProgram(program);
	EXPECT_GL_NO_ERROR();
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Link failure, and a valid program has been installed in the GL state.
	GLuint programNull = glCreateProgram();

	glLinkProgram(programNull);
	glGetProgramiv(programNull, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);

	// Dispatching compute should succeed.
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully linked program should report an error.
	glUseProgram(programNull);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully linked program, that program should not
	// replace the program binary residing in the GL state. It will not make
	// the installed program invalid either, like what UseProgram(0) can do.
	// So, dispatching compute should succeed.
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// We try to relink the installed program, but make it fail.

	// No compute shader, relink fails.
	glDetachShader(program, cs);
	glLinkProgram(program);
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_FALSE(linkStatus);
	EXPECT_GL_NO_ERROR();

	// Dispatching compute should succeed.
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully relinked program should report an error.
	glUseProgram(program);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	// Using the unsuccessfully relinked program, that program should not
	// replace the program binary residing in the GL state. It will not make
	// the installed program invalid either, like what UseProgram(0) can do.
	// So, dispatching compute should succeed.
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	// If you compile and link a compute program successfully and use the program,
	// then dispatching compute can succeed, while starting rendering will fail.
	// If you relink the compute program to a rendering program when it is in use,
	// then dispatching compute will fail, but starting rendering can succeed.
	TEST_P(LinkAndRelinkTestES31, RelinkProgramSucceedsFromComputeToRendering)
	{
	constexpr char kCS[] = R"(#version 310 es
	layout(local_size_x=1) in;
	void main()
	{
	})";

	GLuint program = glCreateProgram();

	GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
	EXPECT_NE(0u, cs);

	glAttachShader(program, cs);
	glDeleteShader(cs);

	glLinkProgram(program);
	glDetachShader(program, cs);
	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glUseProgram(program);
	EXPECT_GL_NO_ERROR();
	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	constexpr char kVS[] = "void main() {}";
	constexpr char kFS[] = "void main() {}";

	GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
	GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);
	EXPECT_NE(0u, vs);
	EXPECT_NE(0u, fs);

	glAttachShader(program, vs);
	glDeleteShader(vs);

	glAttachShader(program, fs);
	glDeleteShader(fs);

	glLinkProgram(program);
	glDetachShader(program, vs);
	glDetachShader(program, fs);
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	// If you compile and link a rendering program successfully and use the program,
	// then starting rendering can succeed, while dispatching compute will fail.
	// If you relink the rendering program to a compute program when it is in use,
	// then starting rendering will fail, but dispatching compute can succeed.
	TEST_P(LinkAndRelinkTestES31, RelinkProgramSucceedsFromRenderingToCompute)
	{
	constexpr char kVS[] = "void main() {}";
	constexpr char kFS[] = "void main() {}";

	GLuint program = glCreateProgram();

	GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
	GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);

	EXPECT_NE(0u, vs);
	EXPECT_NE(0u, fs);

	glAttachShader(program, vs);
	glDeleteShader(vs);

	glAttachShader(program, fs);
	glDeleteShader(fs);

	glLinkProgram(program);
	glDetachShader(program, vs);
	glDetachShader(program, fs);
	GLint linkStatus;
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glUseProgram(program);
	EXPECT_GL_NO_ERROR();
	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);

	constexpr char kCS[] = R"(#version 310 es
	layout(local_size_x=1) in;
	void main()
	{
	})";

	GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
	EXPECT_NE(0u, cs);

	glAttachShader(program, cs);
	glDeleteShader(cs);

	glLinkProgram(program);
	glDetachShader(program, cs);
	glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
	EXPECT_GL_TRUE(linkStatus);

	EXPECT_GL_NO_ERROR();

	glDispatchCompute(8, 4, 2);
	EXPECT_GL_NO_ERROR();

	glDrawArrays(GL_POINTS, 0, 1);
	EXPECT_GL_ERROR(GL_INVALID_OPERATION);
	}

	ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(LinkAndRelinkTest);
	ANGLE_INSTANTIATE_TEST_ES31(LinkAndRelinkTestES31);

	} // namespace