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author | Rhys Weatherley <rhys.weatherley@nokia.com> | 2009-03-23 22:58:57 (GMT) |
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committer | Tom Cooksey <thomas.cooksey@nokia.com> | 2009-04-03 09:12:36 (GMT) |
commit | 2cb3823e440116f331c0287b29667f7c448e3ed0 (patch) | |
tree | 380242b5b64e54c436ef08325ade9f4fa1cc535e /examples/opengl | |
parent | ac7484e36bfab69473278d7268cf37f7c69abfd2 (diff) | |
download | Qt-2cb3823e440116f331c0287b29667f7c448e3ed0.zip Qt-2cb3823e440116f331c0287b29667f7c448e3ed0.tar.gz Qt-2cb3823e440116f331c0287b29667f7c448e3ed0.tar.bz2 |
Import shader implementation from before the history cut.
Diffstat (limited to 'examples/opengl')
-rw-r--r-- | examples/opengl/hellogl_es2/glwidget.cpp | 391 | ||||
-rw-r--r-- | examples/opengl/hellogl_es2/glwidget.h | 31 |
2 files changed, 119 insertions, 303 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; } diff --git a/examples/opengl/hellogl_es2/glwidget.h b/examples/opengl/hellogl_es2/glwidget.h index 9a7823a..596e1cc 100644 --- a/examples/opengl/hellogl_es2/glwidget.h +++ b/examples/opengl/hellogl_es2/glwidget.h @@ -43,7 +43,11 @@ #define GLWIDGET_H #include <QGLWidget> +#include <QtGui/qvector3d.h> +#include <QtGui/qmatrix4x4.h> +#include <QtOpenGL/qglshaderprogram.h> #include <QTime> +#include <QVector> class Bubble; class GLWidget : public QGLWidget { @@ -71,24 +75,21 @@ private: void createBubbles(int number); void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4); void extrude(qreal x1, qreal y1, qreal x2, qreal y2); - QList<qreal> vertices; - QList<qreal> normals; - GLfloat *createdVertices; - GLfloat *createdNormals; - int m_vertexNumber; + QVector<QVector3D> vertices; + QVector<QVector3D> normals; bool qtLogo; QList<Bubble*> bubbles; int frames; QTime time; - GLuint program1; - GLuint program2; - GLuint vertexAttr1; - GLuint normalAttr1; - GLuint matrixUniform1; - GLuint vertexAttr2; - GLuint normalAttr2; - GLuint texCoordAttr2; - GLuint matrixUniform2; - GLuint textureUniform2; + QGLShaderProgram program1; + QGLShaderProgram program2; + int vertexAttr1; + int normalAttr1; + int matrixUniform1; + int vertexAttr2; + int normalAttr2; + int texCoordAttr2; + int matrixUniform2; + int textureUniform2; }; #endif |