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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include <GLES2/gl2.h>
- #include <GLES2/gl2ext.h>
- #include <stdint.h>
- #include "gpu/command_buffer/tests/gl_manager.h"
- #include "gpu/command_buffer/tests/gl_test_utils.h"
- #include "testing/gtest/include/gtest/gtest.h"
- namespace gpu {
- namespace {
- class GLOOBAttribTest : public testing::Test {
- protected:
- void SetUp() override { gl_.Initialize(GLManager::Options()); }
- void TearDown() override { gl_.Destroy(); }
- GLManager gl_;
- };
- // Tests that enabling a vertex array for a location that matches any column of
- // a matrix attribute correctly triggers out-of-bounds checks.
- TEST_F(GLOOBAttribTest, DrawUsingOOBMatrixAttrib) {
- // The passthrough command decoder uses robust buffer access behaviour. This
- // makes OOB error checks unimportant because OOB accesses will not cause
- // errors. OOB accesses will also return implementation-dependent values.
- // See the KHR_robust_buffer_access_behavior spec for more information.
- if (gl_.gpu_preferences().use_passthrough_cmd_decoder) {
- std::cout << "Test skipped, KHR_robust_buffer_access_behavior enabled.\n";
- return;
- }
- const char kVertexShader[] =
- "attribute mat3 attrib;\n"
- "varying vec4 color;\n"
- "void main () {\n"
- " color = vec4(1.0,\n"
- " attrib[0][0] + attrib[0][1] + attrib[0][2] +\n"
- " attrib[1][0] + attrib[1][1] + attrib[1][2] +\n"
- " attrib[2][0] + attrib[2][1] + attrib[2][2],\n"
- " 1.0,\n"
- " 1.0);\n"
- "}\n";
- const char kFragmentShader[] =
- "precision mediump float;\n"
- "varying vec4 color;\n"
- "void main() {\n"
- " gl_FragColor = color;\n"
- "}\n";
- GLuint program = GLTestHelper::LoadProgram(kVertexShader, kFragmentShader);
- DCHECK(program);
- glUseProgram(program);
- GLuint vbo;
- glGenBuffers(1, &vbo);
- glBindBuffer(GL_ARRAY_BUFFER, vbo);
- glBufferData(GL_ARRAY_BUFFER, 16, nullptr, GL_STATIC_DRAW);
- GLint location = glGetAttribLocation(program, "attrib");
- EXPECT_GE(0, location);
- // All attribs disabled - no error.
- glDrawArrays(GL_TRIANGLES, 0, 1000);
- GLenum expected = GL_NO_ERROR;
- EXPECT_EQ(expected, glGetError());
- for (int i = 0; i < 3; ++i) {
- // Enable any of the valid locations for the attribute, should raise an
- // error if trying to access attributes out-of-bounds.
- glVertexAttribPointer(location + i, 4, GL_UNSIGNED_BYTE, false, 0, nullptr);
- glEnableVertexAttribArray(location + i);
- glDrawArrays(GL_TRIANGLES, 0, 1000);
- expected = GL_INVALID_OPERATION;
- EXPECT_EQ(expected, glGetError());
- // But in-bounds should pass.
- glDrawArrays(GL_TRIANGLES, 0, 3);
- expected = GL_NO_ERROR;
- EXPECT_EQ(expected, glGetError());
- glDisableVertexAttribArray(location + i);
- }
- // Enable an unused location, should not trigger out-of-bounds checks.
- glVertexAttribPointer(location + 3, 4, GL_UNSIGNED_BYTE, false, 0, nullptr);
- glEnableVertexAttribArray(location + 3);
- glDrawArrays(GL_TRIANGLES, 0, 1000);
- expected = GL_NO_ERROR;
- EXPECT_EQ(expected, glGetError());
- }
- } // anonymous namespace
- } // namespace gpu
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