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OpenGL modernization: draw the waterfall the new way

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This commit is contained in:
f4exb 2016-03-05 11:57:53 +01:00
parent 3aabeb4399
commit c5a45e57ee
4 changed files with 70 additions and 27 deletions
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1
include/gui/glshadertextured.h
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@ -36,6 +36,7 @@ public:
void initializeGL();
void initTexture(const QImage& image);
void subTexture(int xOffset, int yOffset, int width, int height, const void *pixels);
void drawSurface(const QMatrix4x4& transformMatrix, GLfloat* textureCoords, GLfloat *vertices, int nbVertices);
void cleanup();

3
include/gui/glspectrum.h
View File

@ -180,9 +180,12 @@ private:
GLShaderSimple m_glShaderSimple;
GLShaderTextured m_glShaderLeftScale;
GLShaderTextured m_glShaderFrequencyScale;
GLShaderTextured m_glShaderWaterfall;
int m_matrixLoc;
int m_colorLoc;
static const int m_waterfallBufferHeight = 256;
void updateWaterfall(const std::vector<Real>& spectrum);
void updateHistogram(const std::vector<Real>& spectrum);

12
sdrbase/gui/glshadertextured.cpp
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@ -74,6 +74,18 @@ void GLShaderTextured::initTexture(const QImage& image)
m_texture->setWrapMode(QOpenGLTexture::Repeat);
}
void GLShaderTextured::subTexture(int xOffset, int yOffset, int width, int height, const void *pixels)
{
if (!m_texture) {
qDebug("GLShaderTextured::subTexture: no texture defined. Doing nothing");
return;
}
QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
m_texture->bind();
f->glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
}
void GLShaderTextured::drawSurface(const QMatrix4x4& transformMatrix, GLfloat *textureCoords, GLfloat *vertices, int nbVertices)
{
draw(GL_TRIANGLE_FAN, transformMatrix, textureCoords, vertices, nbVertices);

81
sdrbase/gui/glspectrum.cpp
View File

@ -512,6 +512,7 @@ void GLSpectrum::initializeGL()
m_glShaderSimple.initializeGL();
m_glShaderLeftScale.initializeGL();
m_glShaderFrequencyScale.initializeGL();
m_glShaderWaterfall.initializeGL();
}
void GLSpectrum::resizeGL(int width, int height)
@ -556,10 +557,7 @@ void GLSpectrum::paintGL()
// paint waterfall
if (m_displayWaterfall)
{
glPushMatrix();
glTranslatef(m_glWaterfallRect.x(), m_glWaterfallRect.y(), 0);
glScalef(m_glWaterfallRect.width(), m_glWaterfallRect.height(), 1);
#ifdef GL_DEPRECATED
glBindTexture(GL_TEXTURE_2D, m_waterfallTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
@ -575,9 +573,13 @@ void GLSpectrum::paintGL()
float prop_y = m_waterfallTexturePos / (m_waterfallTextureHeight - 1.0);
float off = 1.0 / (m_waterfallTextureHeight - 1.0);
glPushMatrix();
glTranslatef(m_glWaterfallRect.x(), m_glWaterfallRect.y(), 0);
glScalef(m_glWaterfallRect.width(), m_glWaterfallRect.height(), 1);
glEnable(GL_TEXTURE_2D);
#ifdef GL_DEPRECATED
glBegin(GL_QUADS);
glTexCoord2f(0, prop_y + 1 - off);
glVertex2f(0, m_invertedWaterfall ? 0 : 1);
@ -588,6 +590,9 @@ void GLSpectrum::paintGL()
glTexCoord2f(0, prop_y);
glVertex2f(0, m_invertedWaterfall ? 1 : 0);
glEnd();
glDisable(GL_TEXTURE_2D);
glPopMatrix();
#else
{
GLfloat vtx1[] = {
@ -596,6 +601,19 @@ void GLSpectrum::paintGL()
1, m_invertedWaterfall ? 1.0f : 0.0f,
0, m_invertedWaterfall ? 1.0f : 0.0f
};
for (int i = 0; i < m_waterfallBufferPos; i++)
{
m_glShaderWaterfall.subTexture(0, m_waterfallTexturePos, m_fftSize, 1, m_waterfallBuffer->scanLine(i));
m_waterfallTexturePos = (m_waterfallTexturePos + 1) % m_waterfallTextureHeight;
}
m_waterfallBufferPos = 0;
float prop_y = m_waterfallTexturePos / (m_waterfallTextureHeight - 1.0);
float off = 1.0 / (m_waterfallTextureHeight - 1.0);
GLfloat tex1[] = {
0, prop_y + 1 - off,
1, prop_y + 1 - off,
@ -603,27 +621,9 @@ void GLSpectrum::paintGL()
0, prop_y
};
#ifdef GL_ANDROID
glEnableVertexAttribArray(GL_VERTEX_ARRAY);
glEnableVertexAttribArray(GL_TEXTURE_COORD_ARRAY);
glVertexAttribPointer(GL_VERTEX_ARRAY, 2, GL_FLOAT, GL_FALSE, 0, vtx1);
glVertexAttribPointer(GL_TEXTURE_COORD_ARRAY, 2, GL_FLOAT, GL_FALSE, 0, tex1);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableVertexAttribArray(GL_VERTEX_ARRAY);
glDisableVertexAttribArray(GL_TEXTURE_COORD_ARRAY);
#else
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, vtx1);
glTexCoordPointer(2, GL_FLOAT, 0, tex1);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#endif
m_glShaderWaterfall.drawSurface(m_glWaterfallBoxMatrix, tex1, vtx1, 4);
}
#endif
glDisable(GL_TEXTURE_2D);
glPopMatrix();
// paint channels
if (m_mouseInside)
@ -1998,25 +1998,52 @@ void GLSpectrum::applyChanges()
}
bool fftSizeChanged = true;
if(m_waterfallBuffer != NULL)
if(m_waterfallBuffer != NULL) {
fftSizeChanged = m_waterfallBuffer->width() != m_fftSize;
}
bool windowSizeChanged = m_waterfallTextureHeight != waterfallHeight;
if (fftSizeChanged || windowSizeChanged)
{
if(m_waterfallBuffer != 0) {
delete m_waterfallBuffer;
}
m_waterfallBuffer = new QImage(m_fftSize, waterfallHeight, QImage::Format_ARGB32);
if(m_waterfallBuffer != 0)
{
m_waterfallBuffer->fill(qRgb(0x00, 0x00, 0x00));
m_glShaderWaterfall.initTexture(*m_waterfallBuffer);
m_waterfallBufferPos = 0;
}
else
{
m_fftSize = 0;
m_changesPending = true;
return;
}
}
if(fftSizeChanged) {
#ifdef GL_DEPRECATED
if(m_waterfallBuffer != NULL) {
delete m_waterfallBuffer;
m_waterfallBuffer = NULL;
}
m_waterfallBuffer = new QImage(m_fftSize, 256, QImage::Format_ARGB32);
m_waterfallBuffer = new QImage(m_fftSize, m_waterfallBufferHeight, QImage::Format_ARGB32);
if(m_waterfallBuffer != NULL) {
m_waterfallBuffer->fill(qRgb(0x00, 0x00, 0x00));
m_glShaderWaterfall.initTexture(*m_waterfallBuffer);
m_waterfallBufferPos = 0;
} else {
m_fftSize = 0;
m_changesPending = true;
return;
}
#endif
if(m_histogramBuffer != NULL) {
delete m_histogramBuffer;
m_histogramBuffer = NULL;