108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
#include "ScopeContext.h"
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#include "ScopeCanvas.h"
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ScopeContext::ScopeContext(ScopeCanvas *canvas, wxGLContext *sharedContext) :
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PrimaryGLContext(canvas, sharedContext) {
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glEnable(GL_CULL_FACE);
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glEnable(GL_DEPTH_TEST);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glGenTextures(1, &waterfall);
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glEnable(GL_TEXTURE_2D);
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glBindTexture(GL_TEXTURE_2D, waterfall);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
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grad.addColor(GradientColor(0, 0, 0));
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grad.addColor(GradientColor(0, 0, 1.0));
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grad.addColor(GradientColor(0, 1.0, 0));
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grad.addColor(GradientColor(1.0, 1.0, 0));
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grad.addColor(GradientColor(1.0, 0.2, 0.0));
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grad.generate(256);
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glPixelTransferi(GL_MAP_COLOR, GL_TRUE);
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glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 256, &(grad.getRed())[0]);
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glPixelMapfv(GL_PIXEL_MAP_I_TO_G, 256, &(grad.getGreen())[0]);
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glPixelMapfv(GL_PIXEL_MAP_I_TO_B, 256, &(grad.getBlue())[0]);
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}
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void ScopeContext::Plot(std::vector<float> &points, std::vector<float> &points2) {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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if (points.size()) {
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memmove(waterfall_tex + FFT_SIZE, waterfall_tex, (NUM_WATERFALL_LINES - 1) * FFT_SIZE);
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for (int i = 0, iMax = FFT_SIZE; i < iMax; i++) {
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float v = points[i * 2 + 1];
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float wv = v;
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if (wv < 0.0)
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wv = 0.0;
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if (wv > 1.0)
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wv = 1.0;
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waterfall_tex[i] = (unsigned char) floor(wv * 255.0);
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}
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}
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glBindTexture(GL_TEXTURE_2D, waterfall);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, FFT_SIZE, NUM_WATERFALL_LINES, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, (GLvoid *) waterfall_tex);
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glDisable(GL_TEXTURE_2D);
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glColor3f(1.0, 1.0, 1.0);
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if (points.size()) {
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glPushMatrix();
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glTranslatef(-1.0f, -0.9f, 0.0f);
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glScalef(2.0f, 1.0f, 1.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, &points[0]);
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glDrawArrays(GL_LINE_STRIP, 0, points.size() / 2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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if (points2.size()) {
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glPushMatrix();
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glTranslatef(-1.0f, 0.5f, 0.0f);
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glScalef(2.0f, 1.0f, 1.0f);
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glEnableClientState(GL_VERTEX_ARRAY);
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glVertexPointer(2, GL_FLOAT, 0, &points2[0]);
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glDrawArrays(GL_LINE_STRIP, 0, points2.size() / 2);
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glDisableClientState(GL_VERTEX_ARRAY);
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glPopMatrix();
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}
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glEnable(GL_TEXTURE_2D);
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// glEnable(GL_COLOR_TABLE);
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glBindTexture(GL_TEXTURE_2D, waterfall);
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glBegin(GL_QUADS);
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glTexCoord2f(0.0, 0.0);
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glVertex3f(-1.0, -1.0, 0.0);
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glTexCoord2f(1.0, 0.0);
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glVertex3f(1.0, -1.0, 0.0);
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glTexCoord2f(1.0, 1.0);
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glVertex3f(1.0, 1.0, 0.0);
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glTexCoord2f(0.0, 1.0);
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glVertex3f(-1.0, 1.0, 0.0);
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glEnd();
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glFlush();
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CheckGLError();
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}
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