/** Generate texture and set filtering parameters.
*
* @param gl OpenGL functions wrapper
* @param target Texture target
* @param internalFormat Texture internal format
*/
void TextureFilterAnisotropicDrawingTestCase::generateTexture(const glw::Functions& gl, GLenum target)
{
gl.genTextures(1, &m_texture);
GLU_EXPECT_NO_ERROR(gl.getError(), "glGenTextures");
gl.bindTexture(target, m_texture);
GLU_EXPECT_NO_ERROR(gl.getError(), "glBindTexture");
gl.texParameteri(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
GLU_EXPECT_NO_ERROR(gl.getError(), "glTexParameteri");
gl.texParameteri(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
GLU_EXPECT_NO_ERROR(gl.getError(), "glTexParameteri");
gl.texParameteri(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
GLU_EXPECT_NO_ERROR(gl.getError(), "glTexParameteri");
gl.texParameteri(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
GLU_EXPECT_NO_ERROR(gl.getError(), "glTexParameteri");
gl.texParameteri(target, GL_TEXTURE_MAX_LEVEL, 1);
GLU_EXPECT_NO_ERROR(gl.getError(), "glTexParameteri");
}
/** Render polygon with anisotropic filtering.
*
* @param gl OpenGL functions wrapper
* @param target Texture target
* @param anisoDegree Degree of anisotropy
*
* @return Returns true if no error occured, false otherwise.
*/
bool TextureFilterAnisotropicDrawingTestCase::drawTexture(const glw::Functions& gl, GLenum target, GLfloat anisoDegree)
{
const GLfloat vertices2[] = { -1.0f, 0.0f, -0.5f, 0.0f, 0.0f, -4.0f, 4.0f, -2.0f, 0.0f, 1.0f,
1.0f, 0.0f, -0.5f, 1.0f, 0.0f, -2.0f, 4.0f, -2.0f, 1.0f, 1.0f };
const GLfloat vertices3[] = { -1.0f, 0.0f, -0.5f, 0.0f, 0.0f, 0.0f, -4.0f, 4.0f, -2.0f, 0.0f, 1.0f, 0.0f,
1.0f, 0.0f, -0.5f, 1.0f, 0.0f, 0.0f, -2.0f, 4.0f, -2.0f, 1.0f, 1.0f, 0.0f };
// Projection values.
const GLfloat projectionMatrix[] = { 0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 0.5f, 0.0f, 0.0f,
0.0f, 0.0f, -2.5f / 1.5f, -2.0f / 1.5f, 0.0f, 0.0f, -1.0f, 0.0f };
gl.viewport(0, 0, 32, 32);
std::string vertexShader = m_vertex;
std::string fragmentShader = m_fragment;
std::string texCoordType;
std::string samplerType;
TextureFilterAnisotropicUtils::generateTokens(target, texCoordType, samplerType);
TextureFilterAnisotropicUtils::replaceToken("<TEXCOORD_TYPE>", texCoordType.c_str(), vertexShader);
TextureFilterAnisotropicUtils::replaceToken("<TEXCOORD_TYPE>", texCoordType.c_str(), fragmentShader);
TextureFilterAnisotropicUtils::replaceToken("<SAMPLER_TYPE>", samplerType.c_str(), vertexShader);
TextureFilterAnisotropicUtils::replaceToken("<SAMPLER_TYPE>", samplerType.c_str(), fragmentShader);
if (glu::isContextTypeGLCore(m_context.getRenderContext().getType()))
{
TextureFilterAnisotropicUtils::replaceToken("<VERSION>", "130", vertexShader);
TextureFilterAnisotropicUtils::replaceToken("<VERSION>", "130", fragmentShader);
}
else
{
TextureFilterAnisotropicUtils::replaceToken("<VERSION>", "300 es", vertexShader);
TextureFilterAnisotropicUtils::replaceToken("<VERSION>", "300 es", fragmentShader);
}
ProgramSources sources = makeVtxFragSources(vertexShader, fragmentShader);
ShaderProgram program(gl, sources);
if (!program.isOk())
{
m_testCtx.getLog() << tcu::TestLog::Message << "Shader build failed.\n"
<< "Vertex: " << program.getShaderInfo(SHADERTYPE_VERTEX).infoLog << "\n"
<< vertexShader << "\n"
<< "Fragment: " << program.getShaderInfo(SHADERTYPE_FRAGMENT).infoLog << "\n"
<< fragmentShader << "\n"
<< "Program: " << program.getProgramInfo().infoLog << tcu::TestLog::EndMessage;
return false;
}
GLuint vao;
gl.genVertexArrays(1, &vao);
GLU_EXPECT_NO_ERROR(gl.getError(), "glGenVertexArrays");
gl.bindVertexArray(vao);
GLU_EXPECT_NO_ERROR(gl.getError(), "glBindVertexArray");
GLuint vbo;
gl.genBuffers(1, &vbo);
GLU_EXPECT_NO_ERROR(gl.getError(), "glGenBuffers");
gl.bindBuffer(GL_ARRAY_BUFFER, vbo);
GLU_EXPECT_NO_ERROR(gl.getError(), "glBindBuffer");
std::vector<GLfloat> vboData;
vboData.resize(24);
GLuint texCoordDim;
if (texCoordType == "vec2")
{
texCoordDim = 2;
deMemcpy((void*)vboData.data(), (void*)vertices2, sizeof(vertices2));
}
else
{
texCoordDim = 3;
deMemcpy((void*)vboData.data(), (void*)vertices3, sizeof(vertices3));
}
gl.bufferData(GL_ARRAY_BUFFER, vboData.size() * sizeof(GLfloat), (GLvoid*)vboData.data(), GL_DYNAMIC_DRAW);
GLU_EXPECT_NO_ERROR(gl.getError(), "glBufferData");
gl.useProgram(program.getProgram());
GLU_EXPECT_NO_ERROR(gl.getError(), "glUseProgram");
GLuint matrixLocation = gl.getUniformLocation(program.getProgram(), "projectionMatrix");
GLuint texLocation = gl.getUniformLocation(program.getProgram(), "tex");
gl.activeTexture(GL_TEXTURE0);
GLU_EXPECT_NO_ERROR(gl.getError(), "glActiveTexture");
gl.bindTexture(target, m_texture);
GLU_EXPECT_NO_ERROR(gl.getError(), "glBindTexture");
gl.uniformMatrix4fv(matrixLocation, 1, GL_FALSE, projectionMatrix);
GLU_EXPECT_NO_ERROR(gl.getError(), "glUniformMatrix4fv");
gl.uniform1i(texLocation, 0);
GLU_EXPECT_NO_ERROR(gl.getError(), "glUniform1i");
gl.texParameterf(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, anisoDegree);
GLU_EXPECT_NO_ERROR(gl.getError(), "texParameterfv");
gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
GLU_EXPECT_NO_ERROR(gl.getError(), "glClearColor");
gl.clear(GL_COLOR_BUFFER_BIT);
GLU_EXPECT_NO_ERROR(gl.getError(), "glClear");
gl.enableVertexAttribArray(0);
GLU_EXPECT_NO_ERROR(gl.getError(), "glEnableVertexAttribArray");
gl.enableVertexAttribArray(1);
GLU_EXPECT_NO_ERROR(gl.getError(), "glEnableVertexAttribArray");
GLint attrLocationVertex = gl.getAttribLocation(program.getProgram(), "vertex");
GLU_EXPECT_NO_ERROR(gl.getError(), "glGetAttribLocation");
GLint attrLocationInTexCoord = gl.getAttribLocation(program.getProgram(), "inTexCoord");
GLU_EXPECT_NO_ERROR(gl.getError(), "glGetAttribLocation");
GLuint strideSize = (3 + texCoordDim) * sizeof(GLfloat);
gl.vertexAttribPointer(attrLocationVertex, 3, GL_FLOAT, GL_FALSE, strideSize, DE_NULL);
GLU_EXPECT_NO_ERROR(gl.getError(), "glVertexAttribPointer");
gl.vertexAttribPointer(attrLocationInTexCoord, texCoordDim, GL_FLOAT, GL_FALSE, strideSize,
(GLvoid*)(3 * sizeof(GLfloat)));
GLU_EXPECT_NO_ERROR(gl.getError(), "glVertexAttribPointer");
gl.drawArrays(GL_TRIANGLE_STRIP, 0, 4);
GLU_EXPECT_NO_ERROR(gl.getError(), "glDrawArray");
gl.disableVertexAttribArray(0);
GLU_EXPECT_NO_ERROR(gl.getError(), "glDisableVertexAttribArray");
gl.disableVertexAttribArray(1);
GLU_EXPECT_NO_ERROR(gl.getError(), "glDisableVertexAttribArray");
if (vbo)
{
gl.deleteBuffers(1, &vbo);
GLU_EXPECT_NO_ERROR(gl.getError(), "glDeleteBuffers");
}
if (vao)
{
gl.deleteVertexArrays(1, &vao);
GLU_EXPECT_NO_ERROR(gl.getError(), "glDeleteVertexArrays");
}
return true;
}