Import shader implementation from before the history cut.

1 files changed, 103 insertions, 288 deletions

diff --git a/examples/opengl/hellogl_es2/glwidget.cpp b/examples/opengl/hellogl_es2/glwidget.cpp
index 213c5b2..ee50670 100644
--- a/examples/opengl/hellogl_es2/glwidget.cpp
+++ b/examples/opengl/hellogl_es2/glwidget.cpp
@@ -48,124 +48,10 @@
 
 const int bubbleNum = 8;
 
-inline void CrossProduct(qreal &xOut, qreal &yOut, qreal &zOut, qreal x1, qreal y1, qreal z1, qreal x2, qreal y2, qreal z2)
-{
-   xOut = y1 * z2 - z1 * y2;
-   yOut = z1 * x2 - x1 * z2;
-   zOut = x1 * y2 - y1 * x2;
-}
-
-inline void Normalize(qreal &x, qreal &y, qreal &z)
-{
-    qreal l = sqrt(x*x + y*y + z*z);
-    x = x / l;
-    y = y / l;
-    z = z / l;
-}
-
-inline void IdentityMatrix(GLfloat *m)
-{
-    m[0 * 4 + 0] = 1.0f;
-    m[1 * 4 + 0] = 0.0f;
-    m[2 * 4 + 0] = 0.0f;
-    m[3 * 4 + 0] = 0.0f;
-    m[0 * 4 + 1] = 0.0f;
-    m[1 * 4 + 1] = 1.0f;
-    m[2 * 4 + 1] = 0.0f;
-    m[3 * 4 + 1] = 0.0f;
-    m[0 * 4 + 2] = 0.0f;
-    m[1 * 4 + 2] = 0.0f;
-    m[2 * 4 + 2] = 1.0f;
-    m[3 * 4 + 2] = 0.0f;
-    m[0 * 4 + 3] = 0.0f;
-    m[1 * 4 + 3] = 0.0f;
-    m[2 * 4 + 3] = 0.0f;
-    m[3 * 4 + 3] = 1.0f;
-}
-
-// Adjust a 4x4 matrix to apply a scale.
-inline void ScaleMatrix(GLfloat *m, GLfloat scalex, GLfloat scaley, GLfloat scalez)
-{
-    m[0 * 4 + 0] *= scalex;
-    m[0 * 4 + 1] *= scalex;
-    m[0 * 4 + 2] *= scalex;
-    m[0 * 4 + 3] *= scalex;
-    m[1 * 4 + 0] *= scaley;
-    m[1 * 4 + 1] *= scaley;
-    m[1 * 4 + 2] *= scaley;
-    m[1 * 4 + 3] *= scaley;
-    m[2 * 4 + 0] *= scalez;
-    m[2 * 4 + 1] *= scalez;
-    m[2 * 4 + 2] *= scalez;
-    m[2 * 4 + 3] *= scalez;
-}
-
-// Adjust a 4x4 matrix to apply a translation.
-inline void TranslateMatrix(GLfloat *m, GLfloat translatex, GLfloat translatey, GLfloat translatez)
-{
-    m[3 * 4 + 0] += m[0 * 4 + 0] * translatex + m[1 * 4 + 0] * translatey + m[2 * 4 + 0] * translatez;
-    m[3 * 4 + 1] += m[0 * 4 + 1] * translatex + m[1 * 4 + 1] * translatey + m[2 * 4 + 1] * translatez;
-    m[3 * 4 + 2] += m[0 * 4 + 2] * translatex + m[1 * 4 + 2] * translatey + m[2 * 4 + 2] * translatez;
-    m[3 * 4 + 3] += m[0 * 4 + 3] * translatex + m[1 * 4 + 3] * translatey + m[2 * 4 + 3] * translatez;
-}
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-// Adjust a 4x4 matrix to apply a rotation.
-inline void RotateMatrix(GLfloat *m, GLfloat angle, GLfloat vx, GLfloat vy, GLfloat vz)
-{
-    GLfloat len = sqrt(vx * vx + vy * vy + vz * vz);
-    if (len != 0) {
-        vx /= len;
-        vy /= len;
-        vz /= len;
-    }
-
-    GLfloat c, s, ic;
-    c = cos(angle * M_PI / 180.0);
-    s = sin(angle * M_PI / 180.0);
-    ic = 1.0f - c;
-
-    GLfloat rot[16];
-    rot[0 * 4 + 0] = vx * vx * ic + c;
-    rot[1 * 4 + 0] = vx * vy * ic - vz * s;
-    rot[2 * 4 + 0] = vx * vz * ic + vy * s;
-    rot[3 * 4 + 0] = 0.0f;
-    rot[0 * 4 + 1] = vy * vx * ic + vz * s;
-    rot[1 * 4 + 1] = vy * vy * ic + c;
-    rot[2 * 4 + 1] = vy * vz * ic - vx * s;
-    rot[3 * 4 + 1] = 0.0f;
-    rot[0 * 4 + 2] = vx * vz * ic - vy * s;
-    rot[1 * 4 + 2] = vy * vz * ic + vx * s;
-    rot[2 * 4 + 2] = vz * vz * ic + c;
-    rot[3 * 4 + 2] = 0.0f;
-    rot[0 * 4 + 3] = 0.0f;
-    rot[1 * 4 + 3] = 0.0f;
-    rot[2 * 4 + 3] = 0.0f;
-    rot[3 * 4 + 3] = 1.0f;
-
-    GLfloat temp[16];
-    for (int i = 0; i < 4; ++i) {
-        for (int j = 0; j < 4; ++j) {
-            temp[j * 4 + i] = 0.0f;
-            for (int k = 0; k < 4; ++k) {
-                temp[j * 4 + i] += m[k * 4 + i] * rot[j * 4 + k];
-            }
-        }
-    }
-
-    qMemCopy(m, temp, sizeof(temp));
-}
-
 GLWidget::GLWidget(QWidget *parent)
     : QGLWidget(parent)
 {
     qtLogo = true;
-    createdVertices = 0;
-    createdNormals = 0;
-    m_vertexNumber = 0;
     frames = 0;
     setAttribute(Qt::WA_PaintOnScreen);
     setAttribute(Qt::WA_NoSystemBackground);
@@ -178,10 +64,6 @@ GLWidget::GLWidget(QWidget *parent)
 
 GLWidget::~GLWidget()
 {
-  if (createdVertices)
-      delete[] createdVertices;
-  if (createdNormals)
-      delete[] createdNormals;
 }
 
 void GLWidget::setScaling(int scale) {
@@ -210,13 +92,11 @@ void GLWidget::showBubbles(bool bubbles)
 void GLWidget::paintQtLogo()
 {
     glDisable(GL_TEXTURE_2D);
-    glVertexAttribPointer(vertexAttr1, 3, GL_FLOAT, GL_FALSE, 0, createdVertices);
-    glEnableVertexAttribArray(vertexAttr1);
-    glVertexAttribPointer(normalAttr1, 3, GL_FLOAT, GL_FALSE, 0, createdNormals);
-    glEnableVertexAttribArray(normalAttr1);
-    glDrawArrays(GL_TRIANGLES, 0, m_vertexNumber / 3);
-    glDisableVertexAttribArray(normalAttr1);
-    glDisableVertexAttribArray(vertexAttr1);
+    program1.setAttributeArray(vertexAttr1, vertices.constData());
+    program1.setAttributeArray(normalAttr1, normals.constData());
+    glDrawArrays(GL_TRIANGLES, 0, vertices.size());
+    program1.disableAttributeArray(normalAttr1);
+    program1.disableAttributeArray(vertexAttr1);
 }
 
 void GLWidget::paintTexturedCube()
@@ -239,8 +119,7 @@ void GLWidget::paintTexturedCube()
         -0.5,  -0.5, -0.5, -0.5, -0.5, 0.5,  0.5, -0.5, -0.5,
         0.5, -0.5, 0.5,  0.5,  -0.5, -0.5, -0.5,  -0.5, 0.5
     };
-    glVertexAttribPointer(vertexAttr2, 3, GL_FLOAT, GL_FALSE, 0, afVertices);
-    glEnableVertexAttribArray(vertexAttr2);
+    program2.setAttributeArray(vertexAttr2, afVertices, 3);
 
     GLfloat afTexCoord[] = {
         0.0f,0.0f, 1.0f,1.0f, 1.0f,0.0f,
@@ -258,8 +137,7 @@ void GLWidget::paintTexturedCube()
         1.0f,0.0f, 1.0f,1.0f, 0.0f,0.0f,
         0.0f,1.0f, 0.0f,0.0f, 1.0f,1.0f
     };
-    glVertexAttribPointer(texCoordAttr2, 2, GL_FLOAT, GL_FALSE, 0, afTexCoord);
-    glEnableVertexAttribArray(texCoordAttr2);
+    program2.setAttributeArray(texCoordAttr2, afTexCoord, 2);
 
     GLfloat afNormals[] = {
 
@@ -278,50 +156,15 @@ void GLWidget::paintTexturedCube()
         0,1,0, 0,1,0, 0,1,0,
         0,1,0, 0,1,0, 0,1,0
     };
-    glVertexAttribPointer(normalAttr2, 3, GL_FLOAT, GL_FALSE, 0, afNormals);
-    glEnableVertexAttribArray(normalAttr2);
+    program2.setAttributeArray(normalAttr2, afNormals, 3);
 
-    glUniform1i(textureUniform2, 0);    // use texture unit 0
+    program2.setUniformValue(textureUniform2, 0);    // use texture unit 0
 
     glDrawArrays(GL_TRIANGLES, 0, 36);
 
-    glDisableVertexAttribArray(vertexAttr2);
-    glDisableVertexAttribArray(normalAttr2);
-    glDisableVertexAttribArray(texCoordAttr2);
-}
-
-static void reportCompileErrors(GLuint shader, const char *src)
-{
-    GLint value = 0;
-    glGetShaderiv(shader, GL_COMPILE_STATUS, &value);
-    bool compiled = (value != 0);
-    value = 0;
-    glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &value);
-    if (!compiled && value > 1) {
-        char *log = new char [value];
-        GLint len;
-        glGetShaderInfoLog(shader, value, &len, log);
-        qWarning("%s\n", log);
-        qWarning("when compiling:\n%s\n", src);
-        delete [] log;
-    }
-}
-
-static void reportLinkErrors(GLuint program, const char *vsrc, const char *fsrc)
-{
-    GLint value = 0;
-    glGetProgramiv(program, GL_LINK_STATUS, &value);
-    bool linked = (value != 0);
-    value = 0;
-    glGetProgramiv(program, GL_INFO_LOG_LENGTH, &value);
-    if (!linked && value > 1) {
-        char *log = new char [value];
-        GLint len;
-        glGetProgramInfoLog(program, value, &len, log);
-        qWarning("%s\n", log);
-        qWarning("when linking:\n%s\nwith:\n%s\n", vsrc, fsrc);
-        delete [] log;
-    }
+    program2.disableAttributeArray(vertexAttr2);
+    program2.disableAttributeArray(normalAttr2);
+    program2.disableAttributeArray(texCoordAttr2);
 }
 
 void GLWidget::initializeGL ()
@@ -332,8 +175,8 @@ void GLWidget::initializeGL ()
     glGenTextures(1, &m_uiTexture);
     m_uiTexture = bindTexture(QImage(":/qt.png"));
 
-    GLuint vshader1 = glCreateShader(GL_VERTEX_SHADER);
-    const char *vsrc1[1] = {
+    QGLShader *vshader1 = new QGLShader(QGLShader::VertexShader, this);
+    const char *vsrc1 =
         "attribute highp vec4 vertex;\n"
         "attribute mediump vec3 normal;\n"
         "uniform mediump mat4 matrix;\n"
@@ -346,36 +189,28 @@ void GLWidget::initializeGL ()
         "    color = vec4(col * 0.2 + col * 0.8 * angle, 1.0);\n"
         "    color = clamp(color, 0.0, 1.0);\n"
         "    gl_Position = matrix * vertex;\n"
-        "}\n"
-    };
-    glShaderSource(vshader1, 1, vsrc1, 0);
-    glCompileShader(vshader1);
-    reportCompileErrors(vshader1, vsrc1[0]);
+        "}\n";
+    vshader1->setSourceCode(vsrc1);
 
-    GLuint fshader1 = glCreateShader(GL_FRAGMENT_SHADER);
-    const char *fsrc1[1] = {
+    QGLShader *fshader1 = new QGLShader(QGLShader::FragmentShader, this);
+    const char *fsrc1 =
         "varying mediump vec4 color;\n"
         "void main(void)\n"
         "{\n"
         "    gl_FragColor = color;\n"
-        "}\n"
-    };
-    glShaderSource(fshader1, 1, fsrc1, 0);
-    glCompileShader(fshader1);
-    reportCompileErrors(fshader1, fsrc1[0]);
-
-    program1 = glCreateProgram();
-    glAttachShader(program1, vshader1);
-    glAttachShader(program1, fshader1);
-    glLinkProgram(program1);
-    reportLinkErrors(program1, vsrc1[0], fsrc1[0]);
-
-    vertexAttr1 = glGetAttribLocation(program1, "vertex");
-    normalAttr1 = glGetAttribLocation(program1, "normal");
-    matrixUniform1 = glGetUniformLocation(program1, "matrix");
-
-    GLuint vshader2 = glCreateShader(GL_VERTEX_SHADER);
-    const char *vsrc2[1] = {
+        "}\n";
+    fshader1->setSourceCode(fsrc1);
+
+    program1.addShader(vshader1);
+    program1.addShader(fshader1);
+    program1.link();
+
+    vertexAttr1 = program1.attributeLocation("vertex");
+    normalAttr1 = program1.attributeLocation("normal");
+    matrixUniform1 = program1.uniformLocation("matrix");
+
+    QGLShader *vshader2 = new QGLShader(QGLShader::VertexShader);
+    const char *vsrc2 =
         "attribute highp vec4 vertex;\n"
         "attribute highp vec4 texCoord;\n"
         "attribute mediump vec3 normal;\n"
@@ -388,14 +223,11 @@ void GLWidget::initializeGL ()
         "    angle = max(dot(normal, toLight), 0.0);\n"
         "    gl_Position = matrix * vertex;\n"
         "    texc = texCoord;\n"
-        "}\n"
-    };
-    glShaderSource(vshader2, 1, vsrc2, 0);
-    glCompileShader(vshader2);
-    reportCompileErrors(vshader2, vsrc2[0]);
+        "}\n";
+    vshader2->setSourceCode(vsrc2);
 
-    GLuint fshader2 = glCreateShader(GL_FRAGMENT_SHADER);
-    const char *fsrc2[1] = {
+    QGLShader *fshader2 = new QGLShader(QGLShader::FragmentShader);
+    const char *fsrc2 =
         "varying highp vec4 texc;\n"
         "uniform sampler2D tex;\n"
         "varying mediump float angle;\n"
@@ -404,23 +236,18 @@ void GLWidget::initializeGL ()
         "    highp vec3 color = texture2D(tex, texc.st).rgb;\n"
         "    color = color * 0.2 + color * 0.8 * angle;\n"
         "    gl_FragColor = vec4(clamp(color, 0.0, 1.0), 1.0);\n"
-        "}\n"
-    };
-    glShaderSource(fshader2, 1, fsrc2, 0);
-    glCompileShader(fshader2);
-    reportCompileErrors(fshader2, fsrc2[0]);
-
-    program2 = glCreateProgram();
-    glAttachShader(program2, vshader2);
-    glAttachShader(program2, fshader2);
-    glLinkProgram(program2);
-    reportLinkErrors(program2, vsrc2[0], fsrc2[0]);
-
-    vertexAttr2 = glGetAttribLocation(program2, "vertex");
-    normalAttr2 = glGetAttribLocation(program2, "normal");
-    texCoordAttr2 = glGetAttribLocation(program2, "texCoord");
-    matrixUniform2 = glGetUniformLocation(program2, "matrix");
-    textureUniform2 = glGetUniformLocation(program2, "tex");
+        "}\n";
+    fshader2->setSourceCode(fsrc2);
+
+    program2.addShader(vshader2);
+    program2.addShader(fshader2);
+    program2.link();
+
+    vertexAttr2 = program2.attributeLocation("vertex");
+    normalAttr2 = program2.attributeLocation("normal");
+    texCoordAttr2 = program2.attributeLocation("texCoord");
+    matrixUniform2 = program2.uniformLocation("matrix");
+    textureUniform2 = program2.uniformLocation("tex");
 
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
@@ -450,24 +277,23 @@ void GLWidget::paintGL()
     glEnable(GL_CULL_FACE);
     glEnable(GL_DEPTH_TEST);
 
-    GLfloat modelview[16];
-    IdentityMatrix(modelview);
-    RotateMatrix(modelview, m_fAngle, 0.0, 1.0, 0.0);
-    RotateMatrix(modelview, m_fAngle, 1.0, 0.0, 0.0);
-    RotateMatrix(modelview, m_fAngle, 0.0, 0.0, 1.0);
-    ScaleMatrix(modelview, m_fScale, m_fScale, m_fScale);
-    TranslateMatrix(modelview, 0, -0.2, 0);
+    QMatrix4x4 modelview;
+    modelview.rotate(m_fAngle, 0.0f, 1.0f, 0.0f);
+    modelview.rotate(m_fAngle, 1.0f, 0.0f, 0.0f);
+    modelview.rotate(m_fAngle, 0.0f, 0.0f, 1.0f);
+    modelview.scale(m_fScale);
+    modelview.translate(0.0f, -0.2f, 0.0f);
 
     if (qtLogo) {
-        glUseProgram(program1);
-        glUniformMatrix4fv(matrixUniform1, 1, GL_FALSE, modelview);
+        program1.enable();
+        program1.setUniformValue(matrixUniform1, modelview);
         paintQtLogo();
-        glUseProgram(0);
+        program1.disable();
     } else {
-        glUseProgram(program2);
-        glUniformMatrix4fv(matrixUniform2, 1, GL_FALSE, modelview);
+        program2.enable();
+        program1.setUniformValue(matrixUniform2, modelview);
         paintTexturedCube();
-        glUseProgram(0);
+        program2.disable();
     }
 
     glDisable(GL_DEPTH_TEST);
@@ -563,80 +389,69 @@ void GLWidget::createGeometry()
         extrude(x8, y8, x5, y5);
     }
 
-    m_vertexNumber = vertices.size();
-    createdVertices = new GLfloat[m_vertexNumber];
-    createdNormals = new GLfloat[m_vertexNumber];
-    for (int i = 0;i < m_vertexNumber;i++) {
-      createdVertices[i] = vertices.at(i) * 2;
-      createdNormals[i] = normals.at(i);
-    }
-    vertices.clear();
-    normals.clear();
+    for (int i = 0;i < vertices.size();i++)
+        vertices[i] *= 2.0f;
 }
 
 void GLWidget::quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4)
 {
-    qreal nx, ny, nz;
+    vertices << QVector3D(x1, y1, -0.05f);
+    vertices << QVector3D(x2, y2, -0.05f);
+    vertices << QVector3D(x4, y4, -0.05f);
 
-    vertices << x1 << y1 << -0.05f;
-    vertices << x2 << y2 << -0.05f;
-    vertices << x4 << y4 << -0.05f;
+    vertices << QVector3D(x3, y3, -0.05f);
+    vertices << QVector3D(x4, y4, -0.05f);
+    vertices << QVector3D(x2, y2, -0.05f);
 
-    vertices << x3 << y3 << -0.05f;
-    vertices << x4 << y4 << -0.05f;
-    vertices << x2 << y2 << -0.05f;
+    QVector3D n = QVector3D::normal
+        (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(x4 - x1, y4 - y1, 0.0f));
 
-    CrossProduct(nx, ny, nz, x2 - x1, y2 - y1, 0, x4 - x1, y4 - y1, 0);
-    Normalize(nx, ny, nz);
+    normals << n;
+    normals << n;
+    normals << n;
 
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
+    normals << n;
+    normals << n;
+    normals << n;
 
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
+    vertices << QVector3D(x4, y4, 0.05f);
+    vertices << QVector3D(x2, y2, 0.05f);
+    vertices << QVector3D(x1, y1, 0.05f);
 
-    vertices << x4 << y4 << 0.05f;
-    vertices << x2 << y2 << 0.05f;
-    vertices << x1 << y1 << 0.05f;
+    vertices << QVector3D(x2, y2, 0.05f);
+    vertices << QVector3D(x4, y4, 0.05f);
+    vertices << QVector3D(x3, y3, 0.05f);
 
-    vertices << x2 << y2 << 0.05f;
-    vertices << x4 << y4 << 0.05f;
-    vertices << x3 << y3 << 0.05f;
+    n = QVector3D::normal
+        (QVector3D(x2 - x4, y2 - y4, 0.0f), QVector3D(x1 - x4, y1 - y4, 0.0f));
 
-    CrossProduct(nx, ny, nz, x2 - x4, y2 - y4, 0, x1 - x4, y1 - y4, 0);
-    Normalize(nx, ny, nz);
+    normals << n;
+    normals << n;
+    normals << n;
 
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
+    normals << n;
+    normals << n;
+    normals << n;
 }
 
 void GLWidget::extrude(qreal x1, qreal y1, qreal x2, qreal y2)
 {
-    qreal nx, ny, nz;
-
-    vertices << x1 << y1 << +0.05f;
-    vertices << x2 << y2 << +0.05f;
-    vertices << x1 << y1 << -0.05f;
+    vertices << QVector3D(x1, y1, +0.05f);
+    vertices << QVector3D(x2, y2, +0.05f);
+    vertices << QVector3D(x1, y1, -0.05f);
 
-    vertices << x2 << y2 << -0.05f;
-    vertices << x1 << y1 << -0.05f;
-    vertices << x2 << y2 << +0.05f;
+    vertices << QVector3D(x2, y2, -0.05f);
+    vertices << QVector3D(x1, y1, -0.05f);
+    vertices << QVector3D(x2, y2, +0.05f);
 
-    CrossProduct(nx, ny, nz, x2 - x1, y2 - y1, 0.0f, 0.0f, 0.0f, -0.1f);
-    Normalize(nx, ny, nz);
+    QVector3D n = QVector3D::normal
+        (QVector3D(x2 - x1, y2 - y1, 0.0f), QVector3D(0.0f, 0.0f, -0.1f));
 
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
+    normals << n;
+    normals << n;
+    normals << n;
 
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
-    normals << nx << ny << nz;
+    normals << n;
+    normals << n;
+    normals << n;
 }