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Globe.c
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Globe.c
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#define WIN32_LEAN_AND_MEAN // discard rarely used components from Windows header
#include <SDL.h>
#include <SDL_main.h> // only include this one in the source file with main()!
#include <stdio.h>
#include <windows.h>
#include <mathimf.h>
#include <c-hashmap.h>
#include <stdlib.h>
#include <winhttp.h>
#include <turbojpeg.h>
#include <miniLZO.h>
#include <direct.h>
#pragma warning( disable : 4996 4244 ) // "safe" print functions, int-float-double conversion
//#define DEBUG
#ifdef DEBUG
#define LOG(x) printf x
#else
#define LOG(x)
#endif
#define _Atomic volatile
int WIDTH = 720;
int HEIGHT = 720;
const int rasterTileSize = 256;
const char idFormat[] = "%d/%d/%d";
const unsigned char zero3[] = { '\0', '\0', '\0' };
const long double PI = 3.141592653589793238462643383279L;
const long double PIHalf = 1.570796326794896619231321691639L;
const long double PIDouble = 6.28318530717958647692528676655L;
// approximations, within 1 period length, precision is not bad but it is not good enough for the sizes and calculations involved here
/*
long double sinl(long double t) {
long double s = t < 0.0L ? -1.0L : 1.0L;
t = fabsl(t);
return s * (t < 0.4292L ?
t : (
t < (PI - 0.4292L) ?
(1.0L - (PI / 4.74701335L) * (PI / 4.74701335L) * (t - PIHalf) * (t - PIHalf)) : (
t < (PI + 0.4292L) ?
(PI - t) : (
t < (PIDouble - 0.4292L) ?
-(1.0L - (PI / 4.74701335L) * (PI / 4.74701335L) * (t - (3.0L * PIHalf)) * (t - (3.0L * PIHalf))) :
(-PIDouble + t)
)
)
)
);
}
long double cosl(long double t) {
t = fabsl(t);
return t < (PIHalf - 0.4292L) ?
(1.0L - (PI / 4.74701335L) * (PI / 4.74701335L) * t * t) : (
t < (PIHalf + 0.4292L) ?
(PIHalf - t) : (
t < (3.0L * PIHalf - 0.4292L) ?
-(1.0L - (PI / 4.74701335L) * (PI / 4.74701335L) * (t - PI) * (t - PI)) : (
t < (3.0L * PIHalf + 0.4292L) ?
(-3.0L * PIHalf + t) : (1.0L - (PI / 4.74701335L) * (PI / 4.74701335L) * (t - PIDouble) * (t - PIDouble))
)
)
);
}
long double asinl(long double s) {
return s < -0.4292L ? -PIHalf + 1.511L * sqrtl(1.0L + s) : (s < 0.4292L ? s : (PIHalf - 1.511L * sqrtl(1.0L - s)));
}
long double acosl(long double s) {
return s < -0.4292L ? PI - 1.511L * sqrtl(1.0L + s) : (s < 0.4292L ? PIHalf - s : (1.511L * sqrtl(1.0L - s)));
}
*/
int centerX, centerY;
long double rScale;
long double rScaleSqr;
long double phiLeft = 0.0L;
long double axisTilt = 0.0L;
typedef struct PT
{
long double p;
long double t;
} pt;
pt at(int x, int y)
{
int xC = x - centerX;
int yC = y - centerY;
long double r2Sqr = rScaleSqr - xC * xC;
if (yC * yC <= r2Sqr)
{
if (r2Sqr > 0.0L)
{
long double r2Sqrt = sqrtl(r2Sqr);
long double yC2 = yC / r2Sqrt;
long double cAT = cosl(axisTilt);
long double ySpace = r2Sqrt * (yC2 * cAT - copysignl(sqrtl((1.0L - yC2 * yC2) * (1.0L - cAT * cAT)), axisTilt)); // == r2Sqrt * sinl(asinl(yC / r2Sqrt) - axisTilt);
long double r2ScAT = r2Sqrt * cAT;
long double r3Sqr = rScaleSqr - ySpace * ySpace;
pt value;
value.p = fmodl(phiLeft + (((axisTilt > 0.0L && -yC > r2ScAT) || (axisTilt < 0.0L && yC > r2ScAT)) ? -1.0L : 1.0L) * (r3Sqr > 0.0L ? sqrtl(r3Sqr) > abs(xC) ? acosl(-xC / sqrtl(r3Sqr)) : (PIHalf + copysignl(PIHalf, xC)) : PIHalf) + PIDouble, PIDouble);
value.t = asinl(ySpace / rScale);
return value;
}
else
{
pt value;
value.p = fmodl(phiLeft + (xC > 0 ? PI : 0.0L) + PIDouble, PIDouble);
value.t = 0.0L;
return value;
}
}
pt value;
value.p = 0.0L;
value.t = 2.0L;
return value;
}
pt getOffsetsFrom(int x, int y, pt sc) {
int xC = x - centerX;
int yC = y - centerY;
long double r2Sqr = rScaleSqr - xC * xC;
if (yC * yC <= r2Sqr)
{
if (r2Sqr > 0.0L)
{
long double r2Sqrt = sqrtl(r2Sqr);
long double yC2 = yC / r2Sqrt;
long double sT = sinl(sc.t);
long double arg2Sqr = rScaleSqr * sT * sT / r2Sqr;
long double arg1Co = 1.0L - yC2 * yC2;
long double axisTilt = asinl(yC2 * sqrtl(1.0L - arg2Sqr) - copysignl(sqrtl(arg2Sqr * arg1Co), sc.t)); // == asinl(yC2) - asinl(rScale * sinl(sc.t) / r2Sqrt);
long double cAT = cosl(axisTilt);
long double r2ScAT = r2Sqrt * cAT;
long double ySpace = r2Sqrt * (yC2 * cAT - copysignl(sqrtl(arg1Co * (1.0L - cAT * cAT)), axisTilt));
long double r3Sqr = rScaleSqr - ySpace * ySpace;
pt value;
value.p = fmodl((sc.p - (((axisTilt > 0.0L && -yC > r2ScAT) || (axisTilt < 0.0L && yC > r2ScAT)) ? -1.0L : 1.0L) * (r3Sqr > 0.0L ? sqrtl(r3Sqr) > abs(xC) ? acosl(-xC / sqrtl(r3Sqr)) : (PIHalf + copysignl(PIHalf, xC)) : PIHalf)) + PIDouble, PIDouble);
value.t = axisTilt;
return value;
}
else {
pt value;
value.p = fmodl(sc.p - (xC > 0 ? PI : 0.0L) + PIDouble, PIDouble);
value.t = 0.0L;
return value;
}
}
pt value;
value.p = 0.0L;
value.t = 2.0L;
return value;
}
pt getOffsetsFromWithRadius(int x, int y, pt sc, long double rScale) {
int xC = x - centerX;
int yC = y - centerY;
long double rScaleSqr = rScale * rScale;
long double r2Sqr = rScaleSqr - xC * xC;
if (yC * yC <= r2Sqr)
{
if (r2Sqr > 0.0L)
{
long double r2Sqrt = sqrtl(r2Sqr);
long double yC2 = yC / r2Sqrt;
long double sT = sinl(sc.t);
long double arg2Sqr = rScaleSqr * sT * sT / r2Sqr;
long double arg1Co = 1.0L - yC2 * yC2;
long double axisTilt = asinl(yC2 * sqrtl(1.0L - arg2Sqr) - copysignl(sqrtl(arg2Sqr * arg1Co), sc.t)); // == asinl(yC2) - asinl(rScale * sinl(sc.t) / r2Sqrt);
long double cAT = cosl(axisTilt);
long double r2ScAT = r2Sqrt * cAT;
long double ySpace = r2Sqrt * (yC2 * cAT - copysignl(sqrtl(arg1Co * (1.0L - cAT * cAT)), axisTilt));
long double r3Sqr = rScaleSqr - ySpace * ySpace;
pt value;
value.p = fmodl((sc.p - (((axisTilt > 0.0L && -yC > r2ScAT) || (axisTilt < 0.0L && yC > r2ScAT)) ? -1.0L : 1.0L) * (r3Sqr > 0.0L ? sqrtl(r3Sqr) > abs(xC) ? acosl(-xC / sqrtl(r3Sqr)) : (PIHalf + copysignl(PIHalf, xC)) : PIHalf)) + PIDouble, PIDouble);
value.t = axisTilt;
return value;
}
else {
pt value;
value.p = fmodl(sc.p - (xC > 0 ? PI : 0.0L) + PIDouble, PIDouble);
value.t = 0.0L;
return value;
}
}
pt value;
value.p = 0.0L;
value.t = 2.0L;
return value;
}
float zoomF;
int zoom;
long double stepSize;
void determineZoom() {
pt middleLeft = at(0, HEIGHT / 2);
float newZoom;
long double newStepSize;
if (middleLeft.t == 2.0L) {
newZoom = log2l(rScale / rasterTileSize); // == log2l(2 * rScale * 2 / rasterTileSize);
newZoom += 2.0F; // == above continued
newStepSize = PIDouble / 48.0L;
} else {
long double deltaP = at(WIDTH - 1, HEIGHT / 2).p - middleLeft.p;
deltaP += (deltaP <= 0.0L ? PIDouble : 0.0L);
newZoom = log2l((WIDTH / deltaP) * PIDouble / rasterTileSize);
newStepSize = deltaP / 16.0L;
}
if (newZoom >= 0.0F && newZoom <= 30.0F) {
zoomF = newZoom;
zoom = (int)ceilf(newZoom);
stepSize = newStepSize;
}
}
const double PID = 3.141592653589793238462643383279;
const double PIHalfD = 1.570796326794896619231321691639;
const double PIDoubleD = 6.28318530717958647692528676655;
/*
double sin(double t) {
double s = t < 0.0 ? -1.0 : 1.0;
t = fabs(t);
return s * (t < 0.4292 ?
t : (
t < (PID - 0.4292) ?
(1.0 - (PID / 4.74701335) * (PID / 4.74701335) * (t - PIHalfD) * (t - PIHalfD)) : (
t < (PID + 0.4292) ?
(PID - t) : (
t < (PIDoubleD - 0.4292) ?
-(1.0 - (PID / 4.74701335) * (PID / 4.74701335) * (t - (3.0 * PIHalfD)) * (t - (3.0 * PIHalfD))) :
(-PIDoubleD + t)
)
)
)
);
}
double cos(double t) {
t = fabs(t);
return t < (PIHalfD - 0.4292) ?
(1.0 - (PID / 4.74701335) * (PID / 4.74701335) * t * t) : (
t < (PIHalfD + 0.4292) ?
(PIHalfD - t) : (
t < (3.0 * PIHalfD - 0.4292) ?
-(1.0 - (PID / 4.74701335) * (PID / 4.74701335) * (t - PID) * (t - PID)) : (
t < (3.0 * PIHalfD + 0.4292) ?
(-3.0 * PIHalfD + t) : (1.0 - (PID / 4.74701335) * (PID / 4.74701335) * (t - PIDoubleD) * (t - PIDoubleD))
)
)
);
}
double asin(double s) {
return s < -0.4292 ? -PIHalfD + 1.511 * sqrt(1.0 + s) : (s < 0.4292 ? s : (PIHalfD - 1.511 * sqrt(1.0 - s)));
}
double acos(double s) {
return s < -0.4292 ? PID - 1.511 * sqrt(1.0 + s) : (s < 0.4292 ? PIHalfD - s : (1.511 * sqrt(1.0 - s)));
}
*/
double rScaleD;
double rScaleSqrD;
double phiLeftD = 0.0;
double axisTiltD = 0.0;
typedef struct PTD
{
double p;
double t;
} ptD;
ptD atD(int x, int y)
{
int xC = x - centerX;
int yC = y - centerY;
double r2Sqr = rScaleSqrD - xC * xC;
if (yC * yC <= r2Sqr)
{
if (r2Sqr > 0.0)
{
double r2Sqrt = sqrt(r2Sqr);
double yC2 = yC / r2Sqrt;
double cAT = cos(axisTiltD);
double ySpace = r2Sqrt * (yC2 * cAT - copysign(sqrt((1.0 - yC2 * yC2) * (1.0 - cAT * cAT)), axisTiltD)); // == r2Sqrt * sin(asin(yC / r2Sqrt) - axisTiltD);
double r2ScAT = r2Sqrt * cAT;
double r3Sqr = rScaleSqrD - ySpace * ySpace;
ptD value;
value.p = fmod(phiLeftD + (((axisTiltD > 0.0 && -yC > r2ScAT) || (axisTiltD < 0.0 && yC > r2ScAT)) ? -1.0 : 1.0) * (r3Sqr > 0.0 ? sqrt(r3Sqr) > abs(xC) ? acos(-xC / sqrt(r3Sqr)) : (PIHalfD + copysign(PIHalfD, xC)) : PIHalfD) + PIDoubleD, PIDoubleD);
value.t = asin(ySpace / rScaleD);
return value;
}
else
{
ptD value;
value.p = fmod(phiLeftD + (xC > 0 ? PID : 0.0) + PIDoubleD, PIDoubleD);
value.t = 0.0;
return value;
}
}
ptD value;
value.p = 0.0;
value.t = 2.0;
return value;
}
const float PIF = 3.141592653589793238462643383279F;
const float PIHalfF = 1.570796326794896619231321691639F;
const float PIDoubleF = 6.28318530717958647692528676655F;
/*
float sinf(float t) {
float s = t < 0.0F ? -1.0F : 1.0F;
t = fabsf(t);
return s * (t < 0.4292F ?
t : (
t < (PIF - 0.4292F) ?
(1.0F - (PIF / 4.74701335F) * (PIF / 4.74701335F) * (t - PIHalfF) * (t - PIHalfF)) : (
t < (PIF + 0.4292F) ?
(PIF - t) : (
t < (PIDoubleF - 0.4292F) ?
-(1.0F - (PIF / 4.74701335F) * (PIF / 4.74701335F) * (t - (3.0F * PIHalfF)) * (t - (3.0F * PIHalfF))) :
(-PIDoubleF + t)
)
)
)
);
}
float cosf(float t) {
t = fabsf(t);
return t < (PIHalfF - 0.4292F) ?
(1.0F - (PIF / 4.74701335F) * (PIF / 4.74701335F) * t * t) : (
t < (PIHalfF + 0.4292F) ?
(PIHalfF - t) : (
t < (3.0F * PIHalfF - 0.4292F) ?
-(1.0F - (PIF / 4.74701335F) * (PIF / 4.74701335F) * (t - PIF) * (t - PIF)) : (
t < (3.0F * PIHalfF + 0.4292F) ?
(-3.0F * PIHalfF + t) : (1.0F - (PIF / 4.74701335F) * (PIF / 4.74701335F) * (t - PIDoubleF) * (t - PIDoubleF))
)
)
);
}
float asinf(float s) {
return s < -0.4292F ? -PIHalfF + 1.511F * sqrtf(1.0F + s) : (s < 0.4292F ? s : (PIHalfF - 1.511F * sqrtf(1.0F - s)));
}
float acosf(float s) {
return s < -0.4292F ? PIF - 1.511F * sqrtf(1.0F + s) : (s < 0.4292F ? PIHalfF - s : (1.511F * sqrtf(1.0F - s)));
}
*/
float rScaleF;
float rScaleSqrF;
float phiLeftF = 0.0F;
float axisTiltF = 0.0F;
typedef struct PTF
{
float p;
float t;
} ptF;
ptF atF(int x, int y)
{
int xC = x - centerX;
int yC = y - centerY;
float r2Sqr = rScaleSqrF - xC * xC;
if (yC * yC <= r2Sqr)
{
if (r2Sqr > 0.0F)
{
float r2Sqrt = sqrtf(r2Sqr);
float yC2 = yC / r2Sqrt;
float cAT = cosf(axisTiltF);
float ySpace = r2Sqrt * (yC2 * cAT - copysignf(sqrtf((1.0F - yC2 * yC2) * (1.0F - cAT * cAT)), axisTiltF)); // == r2Sqrt * sinf(asinf(yC / r2Sqrt) - axisTiltF);
float r2ScAT = r2Sqrt * cAT;
float r3Sqr = rScaleSqrF - ySpace * ySpace;
ptF value;
value.p = fmodf(phiLeftF + (((axisTiltF > 0.0F && -yC > r2ScAT) || (axisTiltF < 0.0F && yC > r2ScAT)) ? -1.0F : 1.0F) * (r3Sqr > 0.0F ? sqrtf(r3Sqr) > abs(xC) ? acosf(-xC / sqrtf(r3Sqr)) : (PIHalfF + copysignf(PIHalfF, xC)) : PIHalfF) + PIDoubleF, PIDoubleF);
value.t = asinf(ySpace / rScaleF);
return value;
}
else
{
ptF value;
value.p = fmodf(phiLeftF + (xC > 0 ? PIF : 0.0F) + PIDoubleF, PIDoubleF);
value.t = 0.0F;
return value;
}
}
ptF value;
value.p = 0.0F;
value.t = 2.0F;
return value;
}
ptF atFWithoutOffsets(float x, float y)
{
float xC = x - centerX;
float yC = y - centerY;
float r2Sqr = rScaleSqrF - xC * xC;
float yC2 = yC * yC;
if (yC2 <= r2Sqr)
{
if (r2Sqr > 0.0F)
{
float r3Sqr = rScaleSqrF - yC2;
ptF value;
value.p = r3Sqr > 0.0F ? sqrtf(r3Sqr) > fabsf(xC) ? acosf(-xC / sqrtf(r3Sqr)) : (PIHalfF + copysignf(PIHalfF, xC)) : PIHalfF;
value.t = asinf(yC / rScaleF);
return value;
}
else
{
ptF value;
value.p = xC > 0.0F ? PIF : 0.0F;
value.t = 0.0F;
return value;
}
}
ptF value;
value.p = 0.0F;
value.t = 2.0F;
return value;
}
// apparently at zoomLevel around before 30, float cannot store the values involved correctly anymore
void determineZoomF() {
ptF middleLeft = atF(0, HEIGHT / 2);
float newZoom;
float newStepSize;
if (middleLeft.t == 2.0F) {
newZoom = log2f(rScaleF / rasterTileSize); // == log2f(2 * rScaleF * 2 / rasterTileSize);
newZoom += 2.0F; // == above continued
newStepSize = PIDoubleF / 48.0F;
}
else {
float deltaP = atF(WIDTH - 1, HEIGHT / 2).p - middleLeft.p;
deltaP += (deltaP <= 0.0F ? PIDoubleF : 0.0F);
newZoom = log2f((WIDTH / deltaP) * PIDoubleF / rasterTileSize);
newStepSize = deltaP / 16.0F;
}
if (newZoom >= 0.0F && newZoom <= 30.0F) {
zoomF = newZoom;
zoom = (int)ceilf(newZoom);
stepSize = newStepSize; // use non-float stepSize on purpose
}
}
typedef struct QueueFillLevel {
unsigned long long count;
} queueFillLevel;
void measurePresence(void* key, size_t ksize, uintptr_t value, void* usr) {
((queueFillLevel*)usr)->count += (unsigned long long)value;
}
_Atomic int allImagesRequestedPresent;
hashmap* imgPresent;
hashmap* imgRequested;
typedef struct AsyncId {
char* id;
int idLength;
HINTERNET hRequest, hConnect, hSession;
unsigned char* buffer;
int bytesRead;
} asyncId;
_Atomic int notquitrequested;
char* cachePath;
size_t cachePathLength;
void onImageLoading(HINTERNET hInternet, DWORD_PTR dwContext, DWORD dwInternetStatus, LPVOID lpvStatusInformation, DWORD dwStatusInformationLength) {
asyncId* aId = (asyncId*)dwContext;
if (notquitrequested) {
if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_READ_COMPLETE) {
if (dwStatusInformationLength > 0) {
aId->bytesRead += dwStatusInformationLength;
int numberBytesToRead = rasterTileSize * rasterTileSize * 3 - aId->bytesRead;
if (numberBytesToRead > 0) {
WinHttpReadData(aId->hRequest, aId->buffer + aId->bytesRead, numberBytesToRead, NULL);
return;
}
}
else {
tjhandle tjInstance = tj3Init(TJINIT_DECOMPRESS);
if (tjInstance != NULL) {
if (tj3DecompressHeader(tjInstance, aId->buffer, aId->bytesRead) == 0) {
unsigned char* pixels = malloc(TJSCALED(tj3Get(tjInstance, TJPARAM_JPEGWIDTH), TJUNSCALED) * TJSCALED(tj3Get(tjInstance, TJPARAM_JPEGHEIGHT), TJUNSCALED) * tjPixelSize[TJPF_RGB]); // malloced length expectation == rasterTileSize * rasterTileSize * 3
if (pixels != NULL) {
if (tj3Decompress8(tjInstance, aId->buffer, aId->bytesRead, pixels, 0, TJPF_RGB) == 0) {
hashmap_set(imgPresent, aId->id, aId->idLength, (uintptr_t)pixels);
}
else {
free(pixels);
}
}
}
tj3Destroy(tjInstance);
}
}
hashmap_set(imgRequested, (void*)(aId->id), aId->idLength, (uintptr_t)0);
queueFillLevel counts;
counts.count = 0;
hashmap_iterate(imgRequested, measurePresence, (void*)&counts);
if (counts.count == 0) {
allImagesRequestedPresent = 1;
}
char* cacheFilePath = malloc(cachePathLength + 24 + 1);
if (cacheFilePath != NULL) {
char* idStartInCachePath = cacheFilePath + cachePathLength;
memcpy(cacheFilePath, cachePath, cachePathLength);
int number = 0;
while (number < aId->idLength) {
char digit = aId->id[number];
if (digit == '/') {
digit = '-';
}
idStartInCachePath[number] = digit;
++number;
}
idStartInCachePath[number] = '\0';
FILE* cacheFile = fopen(cacheFilePath, "wb");
if (cacheFile != NULL) {
fwrite(aId->buffer, 1, aId->bytesRead, cacheFile);
fclose(cacheFile);
}
free(cacheFilePath);
}
goto CLOSE_OPEN;
}
else if (dwInternetStatus == WINHTTP_CALLBACK_FLAG_DATA_AVAILABLE || dwInternetStatus == WINHTTP_CALLBACK_STATUS_HEADERS_AVAILABLE) {
int numberBytesToRead = rasterTileSize * rasterTileSize * 3 - aId->bytesRead;
if (numberBytesToRead > 0) {
WinHttpReadData(aId->hRequest, aId->buffer + aId->bytesRead, numberBytesToRead, NULL);
}
else {
goto CLOSE_OPEN;
}
}
else if (dwInternetStatus == WINHTTP_CALLBACK_FLAG_SENDREQUEST_COMPLETE) {
aId->buffer = malloc(rasterTileSize * rasterTileSize * 3); // using size of uncompressed image hoping it is sufficient (checked above)
if (aId->buffer != NULL) {
WinHttpReceiveResponse(aId->hRequest, NULL);
}
else {
goto CLOSE_OPEN;
}
}
else if (dwInternetStatus == WINHTTP_CALLBACK_STATUS_REQUEST_ERROR) {
hashmap_set(imgRequested, (void*)(aId->id), aId->idLength, (uintptr_t)0);
queueFillLevel counts;
counts.count = 0;
hashmap_iterate(imgRequested, measurePresence, (void*)&counts);
if (counts.count == 0) {
allImagesRequestedPresent = 1;
}
goto CLOSE_OPEN;
}
}
else {
CLOSE_OPEN:
if (aId->buffer != NULL) {
free(aId->buffer);
}
WinHttpSetStatusCallback(aId->hSession,
NULL,
WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS,
(DWORD_PTR)NULL);
WinHttpCloseHandle(aId->hRequest);
WinHttpCloseHandle(aId->hConnect);
WinHttpCloseHandle(aId->hSession);
free(aId);
}
}
_Atomic int doCollecting;
_Atomic int collecting;
_Atomic int rastered;
_Atomic int notScheduled;
_Atomic int wantsCompletion;
_Atomic int checkingImageRequests;
_Atomic int dontWaitForCollector;
int maxThreads;
typedef struct IdData {
char id[25]; // max length of id is 24 + \0 (digits for zoom level 30, xy 2^30, 2 /)
int idLength;
struct IdData* next;
} idData;
typedef struct ThreadData {
int yStart;
int yEnd;
idData dId;
_Atomic int rastering;
_Atomic int imageRequestRequested;
hashmap* lastQueue;
HANDLE hThread;
HANDLE hComplete;
} threadData;
threadData* threadsData;
wchar_t* host;
wchar_t* pathFormat;
wchar_t* path;
char* cachePathCollector;
char* idStartInCachePath;
unsigned __stdcall collector(void* data) {
int processPossibleAdditions = 1;
do {
do {
collecting = 1;
for (int i = 0; i < maxThreads; ++i) {
if (threadsData[i].imageRequestRequested) {
threadsData[i].imageRequestRequested = 0;
idData* dId = &(threadsData[i].dId);
do {
int idLength = dId->idLength;
if (idLength > 0) {
char* id = dId->id;
uintptr_t result;
if (!hashmap_get(imgRequested, (void*)id, idLength, &result)) {
int number = 0;
while (number < idLength) {
char digit = id[number];
if (digit == '/') {
digit = '-';
}
idStartInCachePath[number] = digit;
++number;
}
idStartInCachePath[number] = '\0';
FILE* cacheFile = fopen(cachePathCollector, "rb");
if (cacheFile != NULL) {
unsigned char* cachedImage = malloc(rasterTileSize * rasterTileSize * 3); // using uncompressed size hoping it suffices, checked below
if (cachedImage != NULL) {
size_t sizeRead = fread(cachedImage, sizeof(unsigned char), rasterTileSize * rasterTileSize * 3, cacheFile);
if (sizeRead != 0 && (sizeRead == rasterTileSize * rasterTileSize * 3 || feof(cacheFile))) {
fclose(cacheFile);
tjhandle tjInstance = tj3Init(TJINIT_DECOMPRESS);
if (tjInstance != NULL) {
if (tj3DecompressHeader(tjInstance, cachedImage, sizeRead) == 0) {
unsigned char* pixels = malloc(TJSCALED(tj3Get(tjInstance, TJPARAM_JPEGWIDTH), TJUNSCALED) * TJSCALED(tj3Get(tjInstance, TJPARAM_JPEGHEIGHT), TJUNSCALED) * tjPixelSize[TJPF_RGB]); // malloced length expectation == rasterTileSize * rasterTileSize * 3
if (pixels != NULL) {
if (tj3Decompress8(tjInstance, cachedImage, sizeRead, pixels, 0, TJPF_RGB) == 0) {
free(cachedImage);
char* pId = malloc(idLength);
if (pId != NULL) {
memcpy(pId, id, idLength);
if (hashmap_sets_left_before_resize(imgPresent) <= 2) { // <= 1 should suffice but crash was observed in hashmap_get(imgPresent, ...)
dontWaitForCollector = 0;
int countRastering;
do {
if (!notquitrequested) {
goto LIKE_AIDNULL;
}
countRastering = 0;
for (int j = 0; j < maxThreads; ++j) {
countRastering += threadsData[j].rastering;
}
} while (countRastering || !notScheduled || wantsCompletion || !allImagesRequestedPresent);
hashmap_set(imgPresent, (void*)pId, idLength, (uintptr_t)pixels);
hashmap_set(imgRequested, (void*)pId, idLength, (uintptr_t)0);
dontWaitForCollector = 1;
goto AFTER_IMG_REQUEST;
}
else {
hashmap_set(imgPresent, (void*)pId, idLength, (uintptr_t)pixels);
hashmap_set(imgRequested, (void*)pId, idLength, (uintptr_t)0);
LOG(("from cache: %s\n", id));
goto AFTER_IMG_REQUEST;
}
}
}
free(pixels);
}
}
tj3Destroy(tjInstance);
}
}
else {
fclose(cacheFile);
}
free(cachedImage);
}
else {
fclose(cacheFile);
}
}
HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;
// Use WinHttpOpen to obtain a session handle.
hSession = WinHttpOpen(L"WinHTTP Globe/1.0",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS,
WINHTTP_FLAG_ASYNC);
// Specify an HTTP server.
if (hSession) {
if (WinHttpSetStatusCallback(hSession, (WINHTTP_STATUS_CALLBACK)onImageLoading, WINHTTP_CALLBACK_FLAG_SENDREQUEST_COMPLETE | WINHTTP_CALLBACK_STATUS_HEADERS_AVAILABLE | WINHTTP_CALLBACK_FLAG_DATA_AVAILABLE | WINHTTP_CALLBACK_STATUS_READ_COMPLETE | WINHTTP_CALLBACK_STATUS_REQUEST_ERROR, (DWORD_PTR)NULL) == NULL) {
hConnect = WinHttpConnect(hSession, host, INTERNET_DEFAULT_HTTPS_PORT, 0);
}
}
// Create an HTTP request handle.
if (hConnect) {
wchar_t wId[25];
mbstowcs(wId, id, 25);
_swprintf(path, pathFormat, wId);
hRequest = WinHttpOpenRequest(hConnect, L"GET", path,
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
WINHTTP_FLAG_SECURE);
}
else {
if (hSession) {
WinHttpSetStatusCallback(hSession,
NULL,
WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS,
(DWORD_PTR)NULL);
WinHttpCloseHandle(hSession);
}
}
// Send a request.
if (hRequest) {
asyncId* aId = malloc(sizeof(asyncId));
if (aId != NULL) {
aId->id = malloc(idLength);
if (aId->id != NULL) {
memcpy(aId->id, id, idLength);
aId->idLength = idLength;
aId->hRequest = hRequest;
aId->hConnect = hConnect;
aId->hSession = hSession;
aId->buffer = NULL;
aId->bytesRead = 0;
LOG(("%s\n", id));
if (hashmap_sets_left_before_resize(imgPresent) <= 2) { // <= 1 should suffice but crash was observed in hashmap_get(imgPresent, ...)
dontWaitForCollector = 0;
int countRastering;
do {
if (!notquitrequested) {
free(aId->id);
free(aId);
goto LIKE_AIDNULL;
}
countRastering = 0;
for (int j = 0; j < maxThreads; ++j) {
countRastering += threadsData[j].rastering;
}
} while (countRastering || !notScheduled || wantsCompletion || !allImagesRequestedPresent);
hashmap_set(imgRequested, (void*)(aId->id), aId->idLength, (uintptr_t)aId);
hashmap_set(imgPresent, (void*)(aId->id), aId->idLength, (uintptr_t)NULL);
dontWaitForCollector = 1;
}
else {
hashmap_set(imgRequested, (void*)(aId->id), aId->idLength, (uintptr_t)aId);
hashmap_set(imgPresent, (void*)(aId->id), aId->idLength, (uintptr_t)NULL); // preset memory for it be already present during async callbacks
}
allImagesRequestedPresent = 0;
if (!WinHttpSendRequest(hRequest,
WINHTTP_NO_ADDITIONAL_HEADERS, 0,
WINHTTP_NO_REQUEST_DATA, 0,
0, (DWORD_PTR)aId)) {
hashmap_set(imgRequested, (void*)(aId->id), aId->idLength, (uintptr_t)0);
queueFillLevel counts;
counts.count = 0;
hashmap_iterate(imgRequested, measurePresence, (void*)&counts);
if (counts.count == 0) {
allImagesRequestedPresent = 1;
}
free(aId);
goto LIKE_AIDNULL;
}
}
else {
free(aId);
goto LIKE_AIDNULL;
}
}
else {
LIKE_AIDNULL: ;
WinHttpSetStatusCallback(hSession,
NULL,
WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS,
(DWORD_PTR)NULL);
WinHttpCloseHandle(hRequest);
WinHttpCloseHandle(hConnect);
WinHttpCloseHandle(hSession);
if (!notquitrequested) {
return 0;
}
}
}
else {
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) {
WinHttpSetStatusCallback(hSession,
NULL,
WINHTTP_CALLBACK_FLAG_ALL_NOTIFICATIONS,
(DWORD_PTR)NULL);
WinHttpCloseHandle(hSession);
}
}
}
AFTER_IMG_REQUEST: ;
dId->idLength = 0;
}
dId = dId->next;
} while (dId != NULL);
}
}
collecting = 0;
if (doCollecting && (!rastered || !notScheduled)) {
processPossibleAdditions = 1;
}
else {
break;
}
} while (true);
} while (doCollecting && processPossibleAdditions--);
checkingImageRequests = 0;
return 0;
}
_Atomic int queued;
typedef enum MovementDirection {
ZIN, ZOUT, SIDE, INIT, REFRESH
} movementDirection;
movementDirection dir;
void* buffer;
void* region;
int pitch;
unsigned char* elevationData;
int elevationDataAvailable = 0;
typedef struct Pixel {
int sourceX, sourceY;
int targetX, targetY;
} pixel;
void pickPixel(pixel* p, unsigned char* pixels) {
memcpy((void*)(((unsigned char*)buffer) + (p->targetY * pitch + p->targetX * 3)), (void*)(pixels + (p->sourceY * rasterTileSize + p->sourceX) * 3), 3);
}
const double sx = 0.57735;
const double sy = 0.57735;
const double sz = -0.57735;
const unsigned char w = 255;
const unsigned int r = 0;
const unsigned int g = 1;
const unsigned int b = 2;
const float maxZoomLighting = 2.5F;
/// <summary>
/// lights a pixel from a predefined light ray
/// </summary>
/// <param name="x">x coordinate of the pixel in the window</param>
/// <param name="y">y coordinate of the pixel in the window</param>
/// <param name="rgb">array of 3 unsigned char containing the original color, gets overwritten to the lighted color</param>
void lightPixel(int x, int y, unsigned char* rgb) {
ptF angles = atFWithoutOffsets(x, y);
double ct = cos(-angles.t); // doubles to alleviate banding, does not avail
double nx = ct * cos(angles.p + PID);
double ny = ct * sin(angles.p + PID);
double nz = sin(-angles.t);
double sn = 2.0 * (sx * nx + sy * ny + sz * nz);
double rx = sx - sn * nx;
double ry = sy - sn * ny;
double rz = sz - sn * nz;
double a = -ry / sqrt(rx * rx + ry * ry + rz * rz);
a = a < 0.0 ? 0.0 : a;
double f;
unsigned char m = max(rgb[r], max(rgb[g], rgb[b]));
if (m == rgb[r])
f = 0.275;
else
if (m == rgb[g])
f = 0.35;
else
f = 0.5;
double t = f * a * a * (1.0F - zoomF / maxZoomLighting);
rgb[r] += (unsigned char)((w - rgb[r]) * t);
rgb[g] += (unsigned char)((w - rgb[g]) * t);
rgb[b] += (unsigned char)((w - rgb[b]) * t);
}
void pickPixelWithLighting(pixel* p, unsigned char* pixels) {
unsigned char rgb[3];
memcpy((void*)rgb, (void*)(pixels + (p->sourceY * rasterTileSize + p->sourceX) * 3), 3);
lightPixel(p->targetX, p->targetY, rgb);
memcpy((void*)(((unsigned char*)buffer) + (p->targetY * pitch + p->targetX * 3)), (void*)rgb, 3);
}
typedef struct Link {
pixel* p;
struct Link* l;
} link;
void pickPixels(void* key, size_t ksize, uintptr_t value, void* usr) {
unsigned char* pixels;
hashmap_get(imgPresent, key, ksize, (uintptr_t*)&pixels);
if (pixels != NULL) {
link* l = (link*)value;
do {
pickPixel(l->p, pixels);
free(l->p);
link* currentLink = l;
l = l->l;
free(currentLink);
} while (l != NULL);
}
else {
link* l = (link*)value;
do {
free(l->p);
link* currentLink = l;
l = l->l;
free(currentLink);
} while (l != NULL);
}
free((char*)key);
}
void pickPixelsWithLighting(void* key, size_t ksize, uintptr_t value, void* usr) {
unsigned char* pixels;
hashmap_get(imgPresent, key, ksize, (uintptr_t*)&pixels);
if (pixels != NULL) {
link* l = (link*)value;
do {
pickPixelWithLighting(l->p, pixels);
free(l->p);
link* currentLink = l;
l = l->l;
free(currentLink);
} while (l != NULL);
}
else {
link* l = (link*)value;
do {
free(l->p);
link* currentLink = l;
l = l->l;
free(currentLink);
} while (l != NULL);
}
free((char*)key);
}
void clearQueue(void* key, size_t ksize, uintptr_t value, void* usr) {
link* l = (link*)value;
do {
free(l->p);
link* currentLink = l;
l = l->l;
free(currentLink);
} while (l != NULL);
free((char*)key);
}
// t->t from [0, +/- pi/2] to [0, +/- pi/2] is stretched/mapped to t -> 1/2 * ln(tan(t/2 + pi/4)) from [0, +/- pi/2] to [0, +/- 1.75]