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Graphs.cpp
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// (c) OneOfEleven 2020
//
// This code can be used on terms of WTFPL Version 2 (http://www.wtfpl.net)
#include <math.h>
#pragma hdrstop
#include "Graphs.h"
#include "DataUnit.h"
#include "Unit1.h"
#include "CommsUnit.h"
#include "LCMatch.h"
#include "spline.h"
#include "Calibration.h"
#pragma package(smart_init)
#define GL_CLAMP_TO_EDGE 0x812F
#define AUTO_PEAK_HOLD_COUNT 60 // 3 seconds
// custom dashed line patterns
const float grid_line_pattern1[] = {2.0f, 2.0f};
const float grid_line_pattern2[] = {1.0f, 1.0f};
const float rad_2_deg = 180.0 / M_PI;
const float deg_2_rad = M_PI / 180.0;
#define NON_LIN_GAMMA
#ifdef USE_OPENGL
String __fastcall glErrorStr(GLenum err)
{
switch (err)
{
case GL_NO_ERROR : return "";
case GL_INVALID_ENUM : return "GL_INVALID_ENUM";
case GL_INVALID_VALUE : return "GL_INVALID_VALUE";
case GL_INVALID_OPERATION : return "GL_INVALID_OPERATION";
case GL_STACK_OVERFLOW : return "GL_STACK_OVERFLOW";
case GL_STACK_UNDERFLOW : return "GL_STACK_UNDERFLOW";
case GL_OUT_OF_MEMORY : return "GL_OUT_OF_MEMORY";
default : return "GL_UNKNOWN_0x" + IntToHex((int)err, sizeof(unsigned int) / 2);
}
}
bool WGLExtensionSupported(const char *extension_name)
{
PFNWGLGETEXTENSIONSSTRINGEXTPROC _wglGetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC) wglGetProcAddress("wglGetExtensionsStringEXT");
return (_wglGetExtensionsStringEXT == NULL) ? false : (strstr(_wglGetExtensionsStringEXT(), extension_name) == NULL) ? false : true;
}
#endif
void __fastcall swapBitmapRedBlue(Graphics::TBitmap *bm)
{ // swap the red and blue pixels over
if (bm == NULL)
return;
if (bm->PixelFormat == pf24bit)
{
for (int y = 0; y < bm->Height; y++)
{
uint8_t *p = (uint8_t *)bm->ScanLine[y];
for (int x = 0, w = 0; x < bm->Width; x++, w += 3)
{
uint8_t *q = p + w;
const uint8_t pix = q[0];
q[0] = q[2];
q[2] = pix;
}
}
}
else
if (bm->PixelFormat == pf32bit)
{
for (int y = 0; y < bm->Height; y++)
{
uint8_t *p = (uint8_t *)bm->ScanLine[y];
for (int x = 0, w = 0; x < bm->Width; x++, w += 4)
{
uint8_t *q = p + w;
const uint8_t pix = q[0];
q[0] = q[2];
q[2] = pix;
}
}
}
}
// returns the highest number closest to v, which is a power of 2
// assumes 32 bit ints
inline int __fastcall next_pow2(int value)
{
value--;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
value |= value >> 8;
value |= value >> 16;
value++;
return value;
}
double __fastcall nonLinear(double value, double min, double max, double gamma)
{ // return 0.0 to 'max - min' (assuming value is between min and max)
if (gamma <= GAMMA_MIN)
return value - min; // linear
/*
if (max < min)
{ // swap
const float tmp = max;
max = min;
min = tmp;
}
*/
const double range = fabs(max - min);
if (value < min)
value = min;
#ifdef NON_LIN_GAMMA
const double level = (level >= 0.0) ? pow((value - min) / range, 1.0 / gamma) * range : 0.0; // non-linear scale
// reverse
//value = min + (pow(level / range, gamma) * range);
#else
// double level = value - min;
// const double scale = (10.0 / range) * gamma;
// const double scale = (1.0 / range) * gamma * 10;
// level = (level >= 0.0) ? min + log(1.0 + level * scale) * range / log(1.0 + range * scale) : 0.0;
// double level = value - min;
// level = (level >= 0.0) ? min + log(1.0 + level * gamma) * range / log(1.0 + range * gamma) : 0.0;
const double scale = (gamma - GAMMA_MIN) / (GAMMA_MAX - GAMMA_MIN); // 0 to 1
const double mid = min + (range * scale);
// const double level = min + (log(1.0 + (value - min)) / mid) * max;
const double level = min + (log(1.0 + (value - min)) / mid) / (log(1.0 + range) / range) * range;
//const double level = min + mid * exp(max * value);
//const double value = log((level - min) / mid) / max;
#endif
return level;
}
void __fastcall convolve( const float x[], // input vector
const float h[], // impulse response (or second input vector)
float y[], // output vetor (result of convolution)
const short L) // vector size
{
for (int n = 0; n < L; n++)
{
float sum = x[0] * h[n];
for (int i = 1; i <= n; i++)
sum += x[i] * h[n - i];
y[n] = sum;
}
}
__fastcall CGraphs::CGraphs()
{
#ifdef USE_OPENGL
m_gl.win_control = NULL;
m_gl.hdc = NULL;
m_gl.hrc = NULL;
m_gl.rebuild_fonts = true;
#endif
m_gdi_plus_token = 0;
Gdiplus::GdiplusStartup(&m_gdi_plus_token, &m_gdi_plus_startup_input, NULL);
m_gdi_plus = NULL;
m_pb = NULL;
m_form = NULL;
m_panel = NULL;
m_lpf_coeff = 0.0f;
m_mouse.marker_mem = -1;
m_mouse.marker_index = -1;
m_mouse.graph = -1;
m_mouse.x = -1;
m_mouse.y = -1;
m_mouse.Hz = -1;
m_mouse.cpx = complexf (0);
m_mouse.point_mem = -1;
m_mouse.point_index = -1;
m_mouse.time_mem = -1;
m_mouse.time_index = -1;
m_mouse.graph_type_select = -1;
m_mouse.graph_scale_pos = -1;
m_mouse.graph_v_scale = -1;
m_mouse.graph_h_scale = -1;
m_mouse.graph_scale_pos_drag = -1;
m_mouse.graph_v_scale_drag = -1;
m_mouse.graph_h_scale_drag = -1;
m_mouse.graph_drag = -1;
m_mouse.down_graph = -1;
m_mouse.down_Hz = -1;
m_mouse.down_max = 0;
m_mouse.down_min = 0;
m_mouse.down_val = 0;
m_mouse.down_x = -1;
m_mouse.down_y = -1;
m_mouse.down_marker = -1;
m_graph_bm = new Graphics::TBitmap();
if (m_graph_bm)
{
m_graph_bm->Monochrome = false;
m_graph_bm->Transparent = false;
m_graph_bm->PixelFormat = pf32bit;
}
for (int graph = 0; graph < MAX_GRAPHS; graph++)
{
m_grid[graph].graph_type = GRAPH_TYPE_SIZE; // none
m_grid[graph].bitmap = new Graphics::TBitmap();
if (m_grid[graph].bitmap)
{
m_grid[graph].bitmap->Monochrome = false;
m_grid[graph].bitmap->Transparent = false;
m_grid[graph].bitmap->PixelFormat = pf32bit;
}
#ifdef USE_OPENGL
m_grid[graph].bitmap_texture = 0;
// m_grid[graph].bitmap_pbo = 0;
#endif
m_max[graph].channel = -1;
m_max[graph].index = -1;
m_max[graph].value = 0;
m_min[graph].channel = -1;
m_min[graph].index = -1;
m_min[graph].value = 0;
for (int mem = 0; mem < MAX_MEMORIES; mem++)
{
m_max_visible_index[graph][mem] = -1;
m_min_visible_index[graph][mem] = -1;
}
}
}
__fastcall CGraphs::~CGraphs()
{
for (int graph = 0; graph < MAX_GRAPHS; graph++)
{
if (m_grid[graph].bitmap)
delete m_grid[graph].bitmap;
m_grid[graph].bitmap = NULL;
#ifdef USE_OPENGL
if (m_grid[graph].bitmap_texture != 0)
glDeleteTextures(1, &m_grid[graph].bitmap_texture);
m_grid[graph].bitmap_texture = 0;
/*
if (m_grid[graph].bitmap_pbo != 0)
glDeleteBuffers(1, &m_grid[graph].bitmap_pbo);
m_grid[graph].bitmap_pbo = 0;
*/
#endif
}
if (m_graph_bm != NULL)
delete m_graph_bm;
m_graph_bm = NULL;
if (m_gdi_plus)
delete m_gdi_plus;
m_gdi_plus = NULL;
if (m_gdi_plus_token != 0)
Gdiplus::GdiplusShutdown(m_gdi_plus_token);
m_gdi_plus_token = 0;
#ifdef USE_OPENGL
if (m_gl.hdc)
{
for (int i = 0; i < (int)m_gl.font.size(); i++)
{
if (m_gl.font[i].bitmap != NULL)
delete m_gl.font[i].bitmap;
m_gl.font[i].bitmap = NULL;
if (m_gl.font[i].font != NULL)
delete m_gl.font[i].font;
m_gl.font[i].font = NULL;
if (m_gl.font[i].base != 0)
glDeleteLists(m_gl.font[i].base, 256 - 32);
m_gl.font[i].base = 0;
}
m_gl.font.resize(0);
glMatrixMode(GL_PROJECTION);
//glPopMatrix;
glMatrixMode(GL_MODELVIEW);
//glPopMatrix;
wglMakeCurrent(m_gl.hdc, NULL);
if (m_gl.hrc)
wglDeleteContext(m_gl.hrc);
::ReleaseDC(m_gl.win_control->Handle, m_gl.hdc);
m_gl.hrc = NULL;
m_gl.hdc = NULL;
}
#endif
}
// **********************************
#ifdef USE_OPENGL
void __fastcall CGraphs::glInit(TWinControl *win_control)
{
// GLenum err;
if (win_control == NULL || m_gl.win_control != NULL)
return;
const bool double_buffer = true;
const int width = win_control->ClientWidth;
const int height = win_control->ClientHeight;
// ************
m_gl.win_control = win_control;
m_gl.hdc = ::GetDC(m_gl.win_control->Handle);
if (!m_gl.hdc)
return;
const HDC hOldDC = wglGetCurrentDC();
const HGLRC hOldRC = wglGetCurrentContext();
memset(&m_gl.pfd, 0, sizeof(PIXELFORMATDESCRIPTOR));
m_gl.pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
m_gl.pfd.nVersion = 1;
m_gl.pfd.dwFlags = (double_buffer) ? PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER : PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;
m_gl.pfd.iPixelType = PFD_TYPE_RGBA; // PFD_TYPE_RGBA or PFD_TYPE_COLORINDEX
m_gl.pfd.cColorBits = 32; // 32 or 24
// m_gl.pfd.cDepthBits = 16;
m_gl.pfd.cDepthBits = 32;
m_gl.pfd.iLayerType = PFD_MAIN_PLANE; // PFD_MAIN_PLANE, PFD_OVERLAY_PLANE or PFD_UNDERLAY_PLANE
m_gl.pixel_format = ChoosePixelFormat(m_gl.hdc, &m_gl.pfd);
if (m_gl.pixel_format != NULL && m_gl.pixel_format != 0)
SetPixelFormat(m_gl.hdc, m_gl.pixel_format, &m_gl.pfd);
m_gl.hrc = wglCreateContext(m_gl.hdc); // create an openGL rendering context
// gl_err = glGetError();
wglMakeCurrent(m_gl.hdc, m_gl.hrc); // set current rendering context
// gl_err = glGetError();
// HGLRC rc = wglGetCurrentContext();
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// gluOrtho2D(0, width, height, 0);
glOrtho(0.0f, width, height, 0.0f, -1.0f, 1.0f); // 0,0 bottom left
// glOrtho(0.0f, width, height, 0.0f, 0.0f, 1.0f); // 0,0 top left
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// glLoadMatrixf((const GLfloat*)&basematrix);
if (double_buffer)
{
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
}
else
{
glDrawBuffer(GL_FRONT);
glReadBuffer(GL_FRONT);
}
glDisable(GL_FOG);
glDisable(GL_LIGHTING);
glDisable(GL_LOGIC_OP);
glDisable(GL_STENCIL_TEST);
glDisable(GL_CULL_FACE);
glDisable(GL_SCISSOR_TEST);
glDisable(GL_POLYGON_STIPPLE);
glDisable(GL_LINE_STIPPLE);
glDisable(GL_ALPHA_TEST);
glDisable(GL_DITHER);
glDisable(GL_DEPTH_TEST); // we are only working in 2D (for now)
glDisable(GL_COLOR_MATERIAL);
glDisable(GL_TEXTURE_1D);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_NORMALIZE);
// glDisable(GL_MULTISAMPLE);
glDisable(GL_LINE_SMOOTH);
glDisable(GL_POINT_SMOOTH);
glDisable(GL_POLYGON_SMOOTH);
glDisable(GL_BLEND);
glShadeModel(GL_SMOOTH); // Enable smooth shading
// glShadeModel(GL_FLAT);
glPixelZoom(1.0, 1.0); // Dont scale the image
glPixelStorei(GL_PACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_PACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
glPixelStorei(GL_PACK_SKIP_ROWS, 0);
glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
glPixelStorei(GL_PACK_ALIGNMENT, 4);
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
glPixelTransferi(GL_MAP_STENCIL, GL_FALSE);
glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
// set pixel range 0.0 to 1.0
glPixelTransferi(GL_RED_BIAS, 0); glPixelTransferi(GL_RED_SCALE, 1);
glPixelTransferi(GL_GREEN_BIAS, 0); glPixelTransferi(GL_GREEN_SCALE, 1);
glPixelTransferi(GL_BLUE_BIAS, 0); glPixelTransferi(GL_BLUE_SCALE, 1);
glPixelTransferi(GL_ALPHA_BIAS, 0); glPixelTransferi(GL_ALPHA_SCALE, 1);
// glDisable(GL_CONVOLUTION_1D_EXT);
// glDisable(GL_CONVOLUTION_2D_EXT);
// glDisable(GL_SEPARABLE_2D_EXT);
// glDisable(GL_HISTOGRAM_EXT);
// glDisable(GL_MINMAX_EXT);
// glDisable(GL_TEXTURE_3D_EXT);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
// glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
// glEnable(GL_LINE_SMOOTH);
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST); // Set anti-aliasing
// glHint(GL_LINE_SMOOTH_HINT, GL_FASTEST); // Set anti-aliasing
// glEnable(GL_POINT_SMOOTH);
glHint(GL_POINT_SMOOTH_HINT, GL_NICEST); // Set anti-aliasing
// glHint(GL_POINT_SMOOTH_HINT, GL_FASTEST); // Set anti-aliasing
// glEnable(GL_POLYGON_SMOOTH);
glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST); // Set anti-aliasing
// glHint(GL_POLYGON_SMOOTH_HINT, GL_FASTEST); // Set anti-aliasing
glEnable(GL_BLEND);
// glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// *********
// texture stuff
// select modulate to mix texture with color for shading
//glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
// when texture area is small, bi-linear filter the closest mipmap
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// when texture area is large, bi-linear filter the original
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// the texture ends at the edges (clamp)
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
//glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// ************
// turn the vsync off/on
// wglSwapIntervalEXT(0);
// if (WGLExtensionSupported("WGL_EXT_swap_control"))
{
PFNWGLSWAPINTERVALEXTPROC wglSwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC ) wglGetProcAddress("wglSwapIntervalEXT");
PFNWGLGETSWAPINTERVALEXTPROC wglGetSwapIntervalEXT = (PFNWGLGETSWAPINTERVALEXTPROC) wglGetProcAddress("wglGetSwapIntervalEXT");
if (wglSwapIntervalEXT != NULL)
wglSwapIntervalEXT(0); // no wait .. turn the vsync off
// wglSwapIntervalEXT(1); // wait .. turn the vsync on
// wglSwapIntervalEXT(-1); // wait .. turn the automatic vsync on
}
typedef int (APIENTRY *PFNWGLSWAPINTERVALFARPROC)(int);
// typedef int (__stdcall *PFNWGLSWAPINTERVALFARPROC)(int);
PFNWGLSWAPINTERVALFARPROC wglSwapInterval = (PFNWGLSWAPINTERVALFARPROC)wglGetProcAddress("wglSwapInterval");
if (wglSwapInterval == NULL)
wglSwapInterval = (PFNWGLSWAPINTERVALFARPROC)wglGetProcAddress("wglSwapIntervalEXT");
if (wglSwapInterval != NULL)
wglSwapInterval(0); // no wait .. turn the vsync off
// wglSwapInterval(1); // wait .. turn the vsync on
// ************
{
GLrgba col = colourToGLcolour(settings.m_colours.background);
glClearColor((GLfloat)col.r / 255, (GLfloat)col.g / 255, (GLfloat)col.b / 255, 1.0); // background colour R,G,B,A
}
if (double_buffer)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // if we in 3D mode
//glClear(GL_COLOR_BUFFER_BIT); // if we in 2D mode
glFlush();
SwapBuffers(m_gl.hdc);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // if we in 3D mode
//glClear(GL_COLOR_BUFFER_BIT); // if we in 2D mode
glFlush();
SwapBuffers(m_gl.hdc);
}
else
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // if we in 3D mode
//glClear(GL_COLOR_BUFFER_BIT); // if we in 2D mode
glFlush();
}
// Build Our Bitmap Fonts
glRebuildFonts();
wglMakeCurrent(hOldDC, hOldRC);
}
void __fastcall CGraphs::glRebuildFonts()
{
for (int i = 0; i < (int)m_gl.font.size(); i++)
{
if (m_gl.font[i].bitmap != NULL)
delete m_gl.font[i].bitmap;
m_gl.font[i].bitmap = NULL;
if (m_gl.font[i].font != NULL)
delete m_gl.font[i].font;
m_gl.font[i].font = NULL;
if (m_gl.font[i].base != 0)
glDeleteLists(m_gl.font[i].base, 256 - 32);
m_gl.font[i].base = 0;
}
m_gl.font.resize(0);
if (m_gl.hdc == NULL)
return;
const HDC hOldDC = wglGetCurrentDC();
const HGLRC hOldRC = wglGetCurrentContext();
wglMakeCurrent(m_gl.hdc, m_gl.hrc); // set current rendering context
glBuildFont(m_gl.hdc, "Consolas", 8, false);
glBuildFont(m_gl.hdc, "Consolas", 8, true);
wglMakeCurrent(hOldDC, hOldRC);
m_gl.rebuild_fonts = false;
}
int __fastcall CGraphs::glBuildFont(HDC hdc, String name, int size, bool bold)
{ // Build Our Bitmap Font
glFont gl_font;
if (hdc == 0 || name.IsEmpty() || size <= 0)
return -1;
TFont *m_font = settings.graphFont;
if (!m_font)
return -1;
TFont *font = new TFont();
if (!font)
return -1;
font->Name = m_font->Name;
font->Charset = m_font->Charset;
font->Color = m_font->Color;
font->Size = m_font->Size;
font->Style = m_font->Style;
font->Pitch = m_font->Pitch;
font->Quality = m_font->Quality;
if (!bold)
font->Style = font->Style >> fsBold; // make unbold
else
font->Style = font->Style << fsBold; // make bold
Graphics::TBitmap *bitmap = new Graphics::TBitmap();
if (!bitmap)
{
delete font;
return -1;
}
bitmap->Monochrome = false;
bitmap->Transparent = false;
bitmap->PixelFormat = pf32bit;
bitmap->Width = 256;
bitmap->Height = 64;
bitmap->Canvas->Font = font;
LOGFONT lf;
::GetObject(bitmap->Canvas->Font->Handle, sizeof(LOGFONT), &lf);
lf.lfEscapement = 0;
lf.lfOrientation = lf.lfEscapement;
lf.lfOutPrecision = OUT_TT_ONLY_PRECIS;
const HFONT lf_handle = CreateFontIndirect(&lf);
// const HFONT old_handle = ::SelectObject(bitmap->Canvas->Handle, lf_handle);
::SetGraphicsMode(bitmap->Canvas->Handle, GM_ADVANCED);
HGDIOBJ original = ::SelectObject(hdc, GetStockObject(DEVICE_DEFAULT_FONT)); // save current font
HFONT oldfont = (HFONT)SelectObject(hdc, lf_handle); // Selects the font we want
if (oldfont == 0)
{
if (original != 0)
::SelectObject(hdc, original);
::DeleteObject(lf_handle);
delete font;
return -1;
}
gl_font.base_start = 32;
GLuint list = glGenLists(256 - gl_font.base_start);
if (list == 0)
{
if (original != 0)
::SelectObject(hdc, original);
::DeleteObject(lf_handle);
delete font;
return -1;
}
// Build '256-32' characters starting at character 32
if (!wglUseFontBitmaps(hdc, gl_font.base_start, 255 - gl_font.base_start, list)) // 2D text
// if (!wglUseFontOutlines(hdc, gl_font.base_start, 255 - gl_font.base_start, list, 0.0f, 0.1f, WGL_FONT_POLYGONS, gl_font.gmf)) // 3D text
{
if (original != 0)
::SelectObject(hdc, original);
::DeleteObject(lf_handle);
delete font;
return -1;
}
::SelectObject(hdc, oldfont); // Selects the font we want
::DeleteObject(lf_handle);
gl_font.bitmap = bitmap;
gl_font.font = font;
gl_font.height = bitmap->Canvas->TextHeight("Hg_|");
gl_font.base = list;
m_gl.font.push_back(gl_font);
return m_gl.font.size();
}
int __fastcall CGraphs::glTextWidth(int font_index, String s)
{
if (font_index < 0 || font_index >= (int)m_gl.font.size())
return 0;
if (m_gl.font[font_index].base == 0 || m_gl.font[font_index].bitmap == NULL)
return 0;
// int length = 0;
// for (unsigned int i = 0; i < s.Length(); i++)
//// length += m_gl.font.gmf[s[i]].gmfCellIncX;
// length += m_gl.font.gmf[s[i]].gmfBlackBoxX;
return m_gl.font[font_index].bitmap->Canvas->TextWidth(s);
}
int __fastcall CGraphs::glTextHeight(int font_index, String s)
{
if (font_index < 0 || font_index >= (int)m_gl.font.size())
return 0;
if (m_gl.font[font_index].base == 0 || m_gl.font[font_index].bitmap == NULL)
return 0;
// int length = 0;
// for (unsigned int i = 0; i < s.Length(); i++)
//// length += m_gl.font.gmf[s[i]].gmfCellIncY;
// length += m_gl.font.gmf[s[i]].gmfBlackBoxY;
return m_gl.font[font_index].bitmap->Canvas->TextHeight(s);
}
void CGraphs::glPrint(int font_index, GLint x, GLint y, const char *fmt, ...)
{
if (font_index < 0 || font_index >= (int)m_gl.font.size())
return;
const GLuint base = m_gl.font[font_index].base;
const GLuint base_start = m_gl.font[font_index].base_start;
if (base == 0 || fmt == NULL)
return;
if (fmt == NULL)
return;
va_list ap;
char tmp;
va_start(ap, fmt);
int buf_size = vsnprintf(&tmp, 0, fmt, ap);
va_end(ap);
if (buf_size == 0)
return;
if (buf_size == -1)
buf_size = 512;
char *buf = new char [buf_size + 1];
if (buf == NULL)
return;
va_start(ap, fmt);
vsnprintf_s(buf, buf_size + 1, fmt, ap);
va_end(ap);
glEnable(GL_BLEND);
glShadeModel(GL_SMOOTH);
glPushAttrib(GL_LIST_BIT);
glRasterPos2i(x, y); // Position the text on the screen
// glTranslated(x, y, 0); // Position the text (0,0 - Bottom left)
glListBase(base - base_start);
glCallLists(buf_size, GL_UNSIGNED_BYTE, buf); // Draws the display list text
glPopAttrib();
glShadeModel(GL_FLAT);
delete buf;
}
void __fastcall CGraphs::glTextOut(int font_index, GLint x, GLint y, String s)
{
if (font_index < 0 || font_index >= (int)m_gl.font.size())
return;
const GLuint base = m_gl.font[font_index].base;
const GLuint base_start = m_gl.font[font_index].base_start;
if (base == 0)
return;
y += 3 + (m_gl.font[font_index].height / 2);
glEnable(GL_BLEND);
glShadeModel(GL_SMOOTH);
glPushAttrib(GL_LIST_BIT);
glRasterPos2i(x, y); // Position the text on the screen
// glTranslated(x, y, 0); // Position the text (0,0 - Bottom left)
glListBase(base - base_start);
glCallLists(s.Length(), GL_UNSIGNED_BYTE, AnsiString(s).c_str()); // Draws the display list text
glPopAttrib();
glShadeModel(GL_FLAT);
}
void __fastcall CGraphs::glCircle(const float x, const float y, const float radius, const float deg_start, const float deg_end, const int segments, const bool fill)
{
if (radius > 0.0f && segments > 1)
{
const float deg_step = (deg_end - deg_start) / segments;
if (!fill)
{ // empty circle
glBegin(GL_LINE_LOOP);
for (int i = 0; i < segments; i++)
{
const float phi = (deg_start + (deg_step * i)) * deg_2_rad;
const GLfloat vx = (GLfloat)(x + (cosf(phi) * radius));
const GLfloat vy = (GLfloat)(y - (sinf(phi) * radius));
glVertex2f(vx, vy);
}
glEnd();
}
else
{ // filled circle
//glShadeModel(GL_SMOOTH);
glShadeModel(GL_FLAT);
glBegin(GL_TRIANGLE_FAN);
glVertex2f(x, y); // center
for (int i = 0; i <= segments; i++)
{
const float phi = (deg_start + (deg_step * i)) * deg_2_rad;
const GLfloat vx = (GLfloat)(x + (cosf(phi) * radius));
const GLfloat vy = (GLfloat)(y - (sinf(phi) * radius));
glVertex2f(vx, vy);
}
glEnd();
//glShadeModel(GL_FLAT);
}
}
}
void __fastcall CGraphs::glResize(const int width, const int height)
{
GLenum err;
if (!m_gl.hdc || m_gl.hrc == NULL || width <= 0 || height <= 0)
return;
const HDC hOldDC = wglGetCurrentDC();
const HGLRC hOldRC = wglGetCurrentContext();
wglMakeCurrent(m_gl.hdc, m_gl.hrc);
glFlush();
glMatrixMode(GL_MODELVIEW);
glViewport(0, 0, width, height);
// err = glGetError();
// if (err != GL_NO_ERROR)
// {
// String s = glErrorStr(err);
// }
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
// gluOrtho2D(0, width, height, 0);
glOrtho(0.0f, width, height, 0.0f, -1.0f, 1.0f); // 0,0 bottom left
// glOrtho(0.0f, width, height, 0.0f, 0.0f, 1.0f); // 0,0 top left
// err = glGetError();
// if (err != GL_NO_ERROR)
// {
// String s = glErrorStr(err);
// }
//
// const GLfloat nRange = 200.0f;
// if (width <= height)
// glOrtho(-nRange, nRange, -nRange * height / width, nRange * height / width, -nRange, nRange);
// else
// glOrtho(-nRange * width / height, nRange * width / height, -nRange, nRange, -nRange, nRange);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// glFinish();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // if we in 3D mode
// glClear(GL_COLOR_BUFFER_BIT); // if we in 2D mode
glFlush();
SwapBuffers(m_gl.hdc);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // if we in 3D mode
// glClear(GL_COLOR_BUFFER_BIT); // if we in 2D mode
glFlush();
SwapBuffers(m_gl.hdc);
wglMakeCurrent(hOldDC, hOldRC);
}
GLuint __fastcall CGraphs::createTexture(Graphics::TBitmap *bitmap, bool pixel_perfect)
{
if (!bitmap)
return 0;
if (bitmap->Width <= 0 || bitmap->Height <= 0)
return 0;
Graphics::TBitmap *bm = new Graphics::TBitmap();
if (bm == NULL)
return 0;
// const int size = (next_pow2(bitmap->Width) > next_pow2(bitmap->Height)) ? next_pow2(bitmap->Width) : next_pow2(bitmap->Height);
bm->Monochrome = false;
bm->Transparent = false;
bm->PixelFormat = pf24bit;
bm->Width = next_pow2(bitmap->Width);
bm->Height = next_pow2(bitmap->Height);
// resize the bitmap
Gdiplus::Bitmap p_bitmap(bitmap->Handle, bitmap->Palette);
Gdiplus::Graphics p_bm(bm->Canvas->Handle);
p_bm.SetSmoothingMode(Gdiplus::SmoothingModeDefault);
//p_bm.SetSmoothingMode(Gdiplus::SmoothingModeHighQuality); // SmoothingModeAntiAlias
//p_bm.SetInterpolationMode(Gdiplus::InterpolationModeHighQualityBicubic);
p_bm.DrawImage(&p_bitmap, 0, 0, bm->Width, bm->Height);
// need to swap the red and blue pixels
// swapBitmapRedBlue(bm);
const bool GL_TEXTURE_2D_wasEnabled = glIsEnabled(GL_TEXTURE_2D);
GLint oldTexture = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &oldTexture);
// glEnable(GL_POLYGON_SMOOTH);
// glShadeModel(GL_SMOOTH);
// glDisable(GL_POLYGON_SMOOTH);
// glShadeModel(GL_FLAT);
glEnable(GL_TEXTURE_2D);
// allocate a texture name
GLuint texture_id;
glGenTextures(1, &texture_id);
if (texture_id == 0)
{
delete bm;
return 0;
}
// select modulate to mix texture with color for shading
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
// select the texture
glBindTexture(GL_TEXTURE_2D, texture_id);
// when texture area is small, bi-linear filter the closest mipmap
// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
// when texture area is large, bi-linear filter the original
// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
if (pixel_perfect)
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
else
{
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
// the texture ends at the edges (clamp)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
// build the texture mipmaps
glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, bm->Width, bm->Height, 0, GL_RGB, GL_UNSIGNED_BYTE, bm->ScanLine[bm->Height - 1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_BGR_EXT, bm->Width, bm->Height, 0, GL_RGB, GL_UNSIGNED_BYTE, bm->ScanLine[bm->Height - 1]);
/*
Gdiplus::Rect rect(0, 0, p_bitmap->GetWidth(), p_bitmap->GetHeight());
Gdiplus::BitmapData data;
p_bitmap->LockBits(&rect, Gdiplus::ImageLockModeRead, PixelFormat24bppRGB, &data);
//p_bitmap->LockBits(&rect, Gdiplus::ImageLockModeRead, PixelFormat32bppARGB, &data);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, data.Width, data.Height, 0, GL_RGB, GL_UNSIGNED_BYTE, data.Scan0);
p_bitmap->UnlockBits(&data);
*/
// glBindTexture(GL_TEXTURE_2D, 0);
glBindTexture(GL_TEXTURE_2D, oldTexture);
if (!GL_TEXTURE_2D_wasEnabled)
glDisable(GL_TEXTURE_2D);
delete bm;
return texture_id;
}
void __fastcall CGraphs::renderTexture(const TRect rect, const GLuint texture_id)
{
if (rect.IsEmpty() || texture_id == 0)
return;
const GLint x1 = rect.left;
const GLint y1 = rect.top;
const GLint x2 = x1 + rect.Width();
const GLint y2 = y1 + rect.Height();
const bool GL_TEXTURE_2D_wasEnabled = glIsEnabled(GL_TEXTURE_2D);
// glEnable(GL_POLYGON_SMOOTH);
// glShadeModel(GL_SMOOTH);
// glDisable(GL_POLYGON_SMOOTH);
// glShadeModel(GL_FLAT);
GLint oldTexture = 0;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &oldTexture);
if (!GL_TEXTURE_2D_wasEnabled)
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texture_id);
glBegin(GL_QUADS);
glTexCoord2f(0, 1); glVertex2i(x1, y1); // top left corner
glTexCoord2f(1, 1); glVertex2i(x2, y1); // top right corner