void QEglFSCursor::draw(const QRectF &r)
{
if (!m_program) {
// one time initialization
createShaderPrograms();
if (!m_cursorAtlas.texture) {
createCursorTexture(&m_cursorAtlas.texture, m_cursorAtlas.image);
m_cursorAtlas.image = QImage();
if (m_cursor.shape != Qt::BitmapCursor)
m_cursor.texture = m_cursorAtlas.texture;
}
}
if (m_cursor.shape == Qt::BitmapCursor && !m_cursor.customCursorImage.isNull()) {
// upload the custom cursor
createCursorTexture(&m_cursor.customCursorTexture, m_cursor.customCursorImage);
m_cursor.texture = m_cursor.customCursorTexture;
m_cursor.customCursorImage = QImage();
}
Q_ASSERT(m_cursor.texture);
glUseProgram(m_program);
const GLfloat x1 = r.left();
const GLfloat x2 = r.right();
const GLfloat y1 = r.top();
const GLfloat y2 = r.bottom();
const GLfloat cursorCoordinates[] = {
x1, y2,
x2, y2,
x1, y1,
x2, y1
};
const GLfloat s1 = m_cursor.textureRect.left();
const GLfloat s2 = m_cursor.textureRect.right();
const GLfloat t1 = m_cursor.textureRect.top();
const GLfloat t2 = m_cursor.textureRect.bottom();
const GLfloat textureCoordinates[] = {
s1, t2,
s2, t2,
s1, t1,
s2, t1
};
glBindTexture(GL_TEXTURE_2D, m_cursor.texture);
glEnableVertexAttribArray(m_vertexCoordEntry);
glEnableVertexAttribArray(m_textureCoordEntry);
glVertexAttribPointer(m_vertexCoordEntry, 2, GL_FLOAT, GL_FALSE, 0, cursorCoordinates);
glVertexAttribPointer(m_textureCoordEntry, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinates);
glUniform1f(m_textureEntry, 0);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_DEPTH_TEST); // disable depth testing to make sure cursor is always on top
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisable(GL_BLEND);
glBindTexture(GL_TEXTURE_2D, 0);
glDisableVertexAttribArray(m_vertexCoordEntry);
glDisableVertexAttribArray(m_textureCoordEntry);
glUseProgram(0);
}
void QEGLPlatformCursor::draw(const QRectF &r)
{
if (!m_program) {
// one time initialization
initializeOpenGLFunctions();
createShaderPrograms();
if (!m_cursorAtlas.texture) {
createCursorTexture(&m_cursorAtlas.texture, m_cursorAtlas.image);
if (m_cursor.shape != Qt::BitmapCursor)
m_cursor.texture = m_cursorAtlas.texture;
}
}
if (m_cursor.shape == Qt::BitmapCursor && m_cursor.customCursorPending) {
// upload the custom cursor
createCursorTexture(&m_cursor.customCursorTexture, m_cursor.customCursorImage);
m_cursor.texture = m_cursor.customCursorTexture;
m_cursor.customCursorPending = false;
}
Q_ASSERT(m_cursor.texture);
m_program->bind();
const GLfloat x1 = r.left();
const GLfloat x2 = r.right();
const GLfloat y1 = r.top();
const GLfloat y2 = r.bottom();
const GLfloat cursorCoordinates[] = {
x1, y2,
x2, y2,
x1, y1,
x2, y1
};
const GLfloat s1 = m_cursor.textureRect.left();
const GLfloat s2 = m_cursor.textureRect.right();
const GLfloat t1 = m_cursor.textureRect.top();
const GLfloat t2 = m_cursor.textureRect.bottom();
const GLfloat textureCoordinates[] = {
s1, t2,
s2, t2,
s1, t1,
s2, t1
};
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, m_cursor.texture);
glBindBuffer(GL_ARRAY_BUFFER, 0);
m_program->enableAttributeArray(m_vertexCoordEntry);
m_program->enableAttributeArray(m_textureCoordEntry);
m_program->setAttributeArray(m_vertexCoordEntry, cursorCoordinates, 2);
m_program->setAttributeArray(m_textureCoordEntry, textureCoordinates, 2);
m_program->setUniformValue(m_textureEntry, 0);
glDisable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_DEPTH_TEST); // disable depth testing to make sure cursor is always on top
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glDisable(GL_BLEND);
glBindTexture(GL_TEXTURE_2D, 0);
m_program->disableAttributeArray(m_textureCoordEntry);
m_program->disableAttributeArray(m_vertexCoordEntry);
m_program->release();
}
