CubicSDR/src/visual/PrimaryGLContext.cpp

250 lines
6.0 KiB
C++
Raw Normal View History

#include "PrimaryGLContext.h"
#include "wx/wxprec.h"
#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif
#if !wxUSE_GLCANVAS
#error "OpenGL required: set wxUSE_GLCANVAS to 1 and rebuild the library"
#endif
#include "CubicSDR.h"
#include "CubicSDRDefs.h"
#include "AppFrame.h"
#include <algorithm>
2014-11-09 04:38:33 -05:00
GLFont PrimaryGLContext::fonts[GLFONT_MAX];
2014-12-08 02:16:06 -05:00
wxString PrimaryGLContext::glGetwxString(GLenum name) {
const GLubyte *v = glGetString(name);
if (v == 0) {
// The error is not important. It is GL_INVALID_ENUM.
// We just want to clear the error stack.
glGetError();
return wxString();
}
return wxString((const char*) v);
}
void PrimaryGLContext::CheckGLError() {
GLenum errLast = GL_NO_ERROR;
for (;;) {
GLenum err = glGetError();
if (err == GL_NO_ERROR)
return;
if (err == errLast) {
wxLogError
(wxT("OpenGL error state couldn't be reset."));
return;
}
errLast = err;
wxLogError
(wxT("OpenGL error %d"), err);
}
}
PrimaryGLContext::PrimaryGLContext(wxGLCanvas *canvas, wxGLContext *sharedContext) :
wxGLContext(canvas, sharedContext) {
SetCurrent(*canvas);
// Pre-load fonts
for (int i = 0; i < GLFONT_MAX; i++) {
getFont((GLFontSize)i);
}
CheckGLError();
}
GLFont &PrimaryGLContext::getFont(GLFontSize esize) {
if (!fonts[esize].isLoaded()) {
std::string fontName;
switch (esize) {
case GLFONT_SIZE12:
fontName = "vera_sans_mono12.fnt";
break;
case GLFONT_SIZE16:
fontName = "vera_sans_mono16.fnt";
break;
case GLFONT_SIZE18:
fontName = "vera_sans_mono18.fnt";
break;
case GLFONT_SIZE24:
fontName = "vera_sans_mono24.fnt";
break;
case GLFONT_SIZE32:
fontName = "vera_sans_mono32.fnt";
break;
case GLFONT_SIZE48:
fontName = "vera_sans_mono48.fnt";
break;
}
fonts[esize].loadFont(fontName);
2014-12-08 02:16:06 -05:00
}
return fonts[esize];
2014-12-08 02:16:06 -05:00
}
2014-12-08 21:08:03 -05:00
void PrimaryGLContext::DrawDemodInfo(DemodulatorInstance *demod, float r, float g, float b) {
if (!demod) {
return;
}
GLint vp[4];
glGetIntegerv( GL_VIEWPORT, vp);
float viewHeight = (float) vp[3];
float viewWidth = (float) vp[2];
float uxPos = (float) (demod->getParams().frequency - (wxGetApp().getFrequency() - SRATE / 2)) / (float) SRATE;
uxPos = (uxPos - 0.5) * 2.0;
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_DST_COLOR);
glColor4f(r, g, b, 0.6);
float ofs = ((float) demod->getParams().bandwidth) / (float) SRATE;
glBlendFunc(GL_SRC_ALPHA, GL_DST_COLOR);
glColor4f(r, g, b, 0.2);
glBegin(GL_QUADS);
glVertex3f(uxPos - ofs, 1.0, 0.0);
glVertex3f(uxPos - ofs, -1.0, 0.0);
glVertex3f(uxPos + ofs, -1.0, 0.0);
glVertex3f(uxPos + ofs, 1.0, 0.0);
glEnd();
float labelHeight = 20.0 / viewHeight;
float hPos = -1.0 + labelHeight;
if (ofs * 2.0 < 16.0 / viewWidth) {
ofs = 16.0 / viewWidth;
glColor4f(r, g, b, 0.2);
glBegin(GL_QUADS);
glVertex3f(uxPos - ofs, hPos + labelHeight, 0.0);
glVertex3f(uxPos - ofs, -1.0, 0.0);
glVertex3f(uxPos + ofs, -1.0, 0.0);
glVertex3f(uxPos + ofs, hPos + labelHeight, 0.0);
glEnd();
}
glColor4f(1.0, 1.0, 1.0, 0.8);
getFont(PrimaryGLContext::GLFONT_SIZE16).drawString(demod->getLabel(), uxPos, hPos, 16, GLFont::GLFONT_ALIGN_CENTER, GLFont::GLFONT_ALIGN_CENTER);
glDisable(GL_BLEND);
}
2014-12-08 21:08:03 -05:00
void PrimaryGLContext::DrawDemod(DemodulatorInstance *demod, float r, float g, float b) {
if (!demod) {
return;
}
float uxPos = (float) (demod->getParams().frequency - (wxGetApp().getFrequency() - SRATE / 2)) / (float) SRATE;
glDisable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_DST_COLOR);
glColor4f(r, g, b, 0.6);
glBegin(GL_LINES);
glVertex3f((uxPos - 0.5) * 2.0, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0, -1.0, 0.0);
float ofs = ((float) demod->getParams().bandwidth) / (float) SRATE;
glVertex3f((uxPos - 0.5) * 2.0 - ofs, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 - ofs, -1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, -1.0, 0.0);
glEnd();
glBlendFunc(GL_SRC_ALPHA, GL_DST_COLOR);
glColor4f(r, g, b, 0.2);
glBegin(GL_QUADS);
glVertex3f((uxPos - 0.5) * 2.0 - ofs, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 - ofs, -1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, -1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, 1.0, 0.0);
glEnd();
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
}
void PrimaryGLContext::DrawFreqSelector(float uxPos, float r, float g, float b, float w) {
DemodulatorInstance *demod = wxGetApp().getDemodMgr().getLastActiveDemodulator();
int bw = 0;
2014-12-08 21:08:03 -05:00
if (!demod) {
2014-12-10 21:22:13 -05:00
bw = defaultDemodParams.bandwidth;
} else {
bw = demod->getParams().bandwidth;
2014-12-08 21:08:03 -05:00
}
2014-12-08 21:08:03 -05:00
glDisable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_DST_COLOR);
glColor4f(r, g, b, 0.6);
glBegin(GL_LINES);
glVertex3f((uxPos - 0.5) * 2.0, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0, -1.0, 0.0);
float ofs;
if (w) {
ofs = w;
} else {
ofs = ((float) bw) / (float) SRATE;
}
2014-12-08 21:08:03 -05:00
glVertex3f((uxPos - 0.5) * 2.0 - ofs, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 - ofs, -1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, 1.0, 0.0);
glVertex3f((uxPos - 0.5) * 2.0 + ofs, -1.0, 0.0);
glEnd();
glDisable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
}
void PrimaryGLContext::BeginDraw() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void PrimaryGLContext::EndDraw() {
glFlush();
CheckGLError();
}