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Added demo UI app for windows #27

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13 changes: 13 additions & 0 deletions VisualC/demo/Demo.vcxproj.filters
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186 changes: 186 additions & 0 deletions VisualC/demo/demo.vcxproj
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190 changes: 190 additions & 0 deletions VisualC/demo/main.cpp
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#ifndef UNICODE
#define UNICODE
#endif

#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <schrift.h>

#include "util/arg.h"

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

static HWND sHwnd;
static COLORREF redColor = RGB(255, 0, 0);
static COLORREF blueColor = RGB(0, 0, 255);
static COLORREF greenColor = RGB(0, 255, 0);
SFT sft;

int width;
int height;

void SetWindowHandle(HWND hwnd)
{
sHwnd = hwnd;
}

void SetPixel(int x, int y, COLORREF& color)
{
if (sHwnd == NULL)
{
exit(0);
}

HDC hdc = GetDC(sHwnd);
SetPixel(hdc, x, y, color);
ReleaseDC(sHwnd, hdc);
return;
}

void RenderText()
{
unsigned long cp;
SFT_Glyph gid, prevGid = 0;
SFT_Image image;
SFT_GMetrics mtx;
SFT_Kerning kerning;

// Text start position in pixels
int xOffset = 10;
int yOffet = 100;

// TODO: use stored text to dispaly
for (cp = 32; cp < 127; ++cp)
{
if (sft_lookup(&sft, cp, &gid) < 0)
continue;
if (sft_gmetrics(&sft, gid, &mtx) < 0)
continue;

image.width = mtx.minWidth;
image.height = mtx.minHeight;
image.pixels = malloc((size_t)image.width * (size_t)image.height);

sft_render(&sft, gid, image);

sft_kerning(&sft, prevGid, gid, &kerning);

xOffset += (int)(mtx.leftSideBearing + kerning.xShift);

for (int h = 0; h < image.height; h++)
{
for (int w = 0; w < image.width; w++)
{
char pixelWeight = 255 - ((char*)image.pixels)[image.width * h + w];
COLORREF grayColor = RGB(pixelWeight, pixelWeight, pixelWeight);
SetPixel(xOffset + w, yOffet + (int)mtx.yOffset + h, grayColor);
}
}

xOffset += (int)mtx.advanceWidth;

free(image.pixels);

prevGid = gid;
}
}

static void Die(const char* msg)
{
fprintf(stderr, "%s\n", msg);
exit(1);
}

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE, PWSTR pCmdLine, int nCmdShow)
{
// Load and setup font
SFT_Font* font;
const char* filename;
double size;

filename = "../../resources/FiraGO-Regular.ttf";
size = 20.0;

if (!(font = sft_loadfile(filename)))
Die("Can't load font file.");

memset(&sft, 0, sizeof sft);
sft.font = font;
sft.xScale = size;
sft.yScale = size;
sft.flags = SFT_DOWNWARD_Y;

// Register the window class.
const wchar_t CLASS_NAME[] = L"Sample Window Class";

WNDCLASS wc = { };

wc.lpfnWndProc = WindowProc;
wc.lpszClassName = CLASS_NAME;
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

RegisterClass(&wc);

// Create the window.
HWND hwnd = CreateWindowEx(
0, // Optional window styles.
CLASS_NAME, // Window class
L"Font rendering program", // Window text
WS_OVERLAPPEDWINDOW & ~WS_MAXIMIZEBOX & ~WS_THICKFRAME, // Window style, To prevent maximing ~WS_MAXIMIZEBOX AND window resizing ~WS_THICKFRAME

// Size and position
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,

NULL, // Parent window
NULL, // Menu
hInstance, // Instance handle
NULL // Additional application data
);

if (hwnd == NULL)
{
return 0;
}

ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);

// TODO: use window size to render text inside window dimensions
RECT rect;
if (GetWindowRect(hwnd, &rect))
{
width = rect.right - rect.left;
height = rect.bottom - rect.top;
}

// Run the message loop.
MSG msg = { };
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}

sft_freefont(font);

return 0;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_DESTROY:
PostQuitMessage(0);
return 0;

case WM_PAINT:
SetWindowHandle(hwnd);
RenderText();

return 0;
}

return DefWindowProc(hwnd, uMsg, wParam, lParam);
}