Merge pull request #102 from mmozeiko/gdi

Demo with Win32 GDI rendering
This commit is contained in:
Micha Mettke 2016-04-23 03:43:13 -07:00
commit 87efb61a9f
5 changed files with 870 additions and 0 deletions

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.gitignore vendored Normal file
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demo/gdi/*.exe
demo/gdi/*.obj

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demo/gdi/build.bat Normal file
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@echo off
rem This will use VS2015 for compiler
call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86
cl /nologo /W3 /WX /O2 /fp:fast /Gm- /Fedemo.exe main.c user32.lib gdi32.lib /link /incremental:no

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demo/gdi/main.c Normal file
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/* nuklear - v1.00 - public domain */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#include <string.h>
#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 600
#define NK_INCLUDE_FIXED_TYPES
#define NK_INCLUDE_DEFAULT_ALLOCATOR
#include "nuklear_gdi.h"
#include "nuklear_gdi.c"
static LRESULT CALLBACK
WindowProc(HWND wnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
switch (msg)
{
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
if (nk_gdi_handle_event(wnd, msg, wparam, lparam))
return 0;
return DefWindowProcW(wnd, msg, wparam, lparam);
}
int main(void)
{
GdiFont* font;
struct nk_context *ctx;
WNDCLASSW wc;
ATOM atom;
RECT rect = { 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT };
DWORD style = WS_OVERLAPPEDWINDOW;
DWORD exstyle = WS_EX_APPWINDOW;
HWND wnd;
HDC dc;
int running = 1;
int needs_refresh = 1;
/* Win32 */
memset(&wc, 0, sizeof(wc));
wc.lpfnWndProc = WindowProc;
wc.hInstance = GetModuleHandleW(0);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.lpszClassName = L"NuklearWindowClass";
atom = RegisterClassW(&wc);
AdjustWindowRectEx(&rect, style, FALSE, exstyle);
wnd = CreateWindowExW(exstyle, wc.lpszClassName, L"Nuklear Demo",
style | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT,
rect.right - rect.left, rect.bottom - rect.top,
NULL, NULL, wc.hInstance, NULL);
dc = GetDC(wnd);
/* GUI */
font = nk_gdifont_create("Arial", 14);
ctx = nk_gdi_init(font, dc, WINDOW_WIDTH, WINDOW_HEIGHT);
while (running)
{
MSG msg;
/* Input */
nk_input_begin(ctx);
if (needs_refresh == 0)
{
if (GetMessageW(&msg, NULL, 0, 0) <= 0)
{
running = 0;
}
else
{
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
needs_refresh = 1;
}
else
{
needs_refresh = 0;
}
while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
running = 0;
TranslateMessage(&msg);
DispatchMessageW(&msg);
needs_refresh = 1;
}
nk_input_end(ctx);
/* GUI */
{struct nk_panel layout;
if (nk_begin(ctx, &layout, "Demo", nk_rect(50, 50, 200, 200),
NK_WINDOW_BORDER|NK_WINDOW_MOVABLE|NK_WINDOW_SCALABLE|
NK_WINDOW_CLOSABLE|NK_WINDOW_MINIMIZABLE|NK_WINDOW_TITLE))
{
enum {EASY, HARD};
static int op = EASY;
static int property = 20;
nk_layout_row_static(ctx, 30, 80, 1);
if (nk_button_label(ctx, "button", NK_BUTTON_DEFAULT))
fprintf(stdout, "button pressed\n");
nk_layout_row_dynamic(ctx, 30, 2);
if (nk_option_label(ctx, "easy", op == EASY)) op = EASY;
if (nk_option_label(ctx, "hard", op == HARD)) op = HARD;
nk_layout_row_dynamic(ctx, 22, 1);
nk_property_int(ctx, "Compression:", 0, &property, 100, 10, 1);
}
nk_end(ctx);}
if (nk_window_is_closed(ctx, "Demo")) break;
/* Draw */
nk_gdi_render(nk_rgb(30,30,30));
}
nk_gdifont_del(font);
ReleaseDC(wnd, dc);
UnregisterClassW(wc.lpszClassName, wc.hInstance);
return 0;
}

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demo/gdi/nuklear_gdi.c Normal file
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#include <stdlib.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <malloc.h>
#define NK_IMPLEMENTATION
#include "nuklear_gdi.h"
#include "../../nuklear.h"
struct GdiFont {
int height;
HFONT handle;
HDC dc;
};
static struct {
HBITMAP bitmap;
HDC window_dc;
HDC memory_dc;
unsigned int width;
unsigned int height;
struct nk_context ctx;
} gdi;
static COLORREF convert_color(struct nk_color c)
{
return c.r | (c.g << 8) | (c.b << 16);
}
static void
nk_gdi_scissor(HDC dc, float x, float y, float w, float h)
{
SelectClipRgn(dc, NULL);
IntersectClipRect(dc, (int)x, (int)y, (int)(x + w + 1), (int)(y + h + 1));
}
static void
nk_gdi_stroke_line(HDC dc, short x0, short y0, short x1,
short y1, unsigned int line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
MoveToEx(dc, x0, y0, NULL);
LineTo(dc, x1, y1);
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_stroke_rect(HDC dc, short x, short y, unsigned short w,
unsigned short h, unsigned short r, unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
SetDCBrushColor(dc, OPAQUE);
if (r == 0) {
Rectangle(dc, x, y, x + w, y + h);
} else {
RoundRect(dc, x, y, x + w, y + h, r, r);
}
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_fill_rect(HDC dc, short x, short y, unsigned short w,
unsigned short h, unsigned short r, struct nk_color col)
{
COLORREF color = convert_color(col);
if (r == 0) {
RECT rect = { x, y, x + w, y + h };
SetBkColor(dc, color);
ExtTextOutW(dc, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL);
} else {
SetDCPenColor(dc, color);
SetDCBrushColor(dc, color);
RoundRect(dc, x, y, x + w, y + h, r, r);
}
}
static void
nk_gdi_fill_triangle(HDC dc, short x0, short y0, short x1,
short y1, short x2, short y2, struct nk_color col)
{
COLORREF color = convert_color(col);
POINT points[] = {
{ x0, y0 },
{ x1, y1 },
{ x2, y2 },
};
SetDCPenColor(dc, color);
SetDCBrushColor(dc, color);
Polygon(dc, points, 3);
}
static void
nk_gdi_stroke_triangle(HDC dc, short x0, short y0, short x1,
short y1, short x2, short y2, unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
POINT points[] = {
{ x0, y0 },
{ x1, y1 },
{ x2, y2 },
{ x0, y0 },
};
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
Polyline(dc, points, 4);
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_fill_polygon(HDC dc, const struct nk_vec2i *pnts, int count, struct nk_color col)
{
int i = 0;
#define MAX_POINTS 64
POINT points[MAX_POINTS];
COLORREF color = convert_color(col);
SetDCBrushColor(dc, color);
SetDCPenColor(dc, color);
for (i = 0; i < count && i < MAX_POINTS; ++i) {
points[i].x = pnts[i].x;
points[i].y = pnts[i].y;
}
Polygon(dc, points, i);
#undef MAX_POINTS
}
static void
nk_gdi_stroke_polygon(HDC dc, const struct nk_vec2i *pnts, int count,
unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
if (count > 0) {
int i;
MoveToEx(dc, pnts[0].x, pnts[0].y, NULL);
for (i = 1; i < count; ++i)
LineTo(dc, pnts[i].x, pnts[i].y);
LineTo(dc, pnts[0].x, pnts[0].y);
}
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_stroke_polyline(HDC dc, const struct nk_vec2i *pnts,
int count, unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
if (count > 0) {
int i;
MoveToEx(dc, pnts[0].x, pnts[0].y, NULL);
for (i = 1; i < count; ++i)
LineTo(dc, pnts[i].x, pnts[i].y);
}
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_fill_circle(HDC dc, short x, short y, unsigned short w,
unsigned short h, struct nk_color col)
{
COLORREF color = convert_color(col);
SetDCBrushColor(dc, color);
SetDCPenColor(dc, color);
Ellipse(dc, x, y, x + w, y + h);
}
static void
nk_gdi_stroke_circle(HDC dc, short x, short y, unsigned short w,
unsigned short h, unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
} else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
SetDCBrushColor(dc, OPAQUE);
Ellipse(dc, x, y, x + w, y + h);
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_stroke_curve(HDC dc, struct nk_vec2i p1,
struct nk_vec2i p2, struct nk_vec2i p3, struct nk_vec2i p4,
unsigned short line_thickness, struct nk_color col)
{
COLORREF color = convert_color(col);
POINT p[] = {
{ p1.x, p1.y },
{ p2.x, p2.y },
{ p3.x, p3.y },
{ p4.x, p4.y },
};
HPEN pen = NULL;
if (line_thickness == 1) {
SetDCPenColor(dc, color);
}
else {
pen = CreatePen(PS_SOLID, line_thickness, color);
SelectObject(dc, pen);
}
SetDCBrushColor(dc, OPAQUE);
PolyBezier(dc, p, 4);
if (pen) {
SelectObject(dc, GetStockObject(DC_PEN));
DeleteObject(pen);
}
}
static void
nk_gdi_draw_text(HDC dc, short x, short y, unsigned short w, unsigned short h,
const char *text, int len, GdiFont *font, struct nk_color cbg, struct nk_color cfg)
{
int wsize;
WCHAR* wstr;
if(!text || !font || !len) return;
wsize = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
wstr = _alloca(wsize * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, text, len, wstr, wsize);
SetBkColor(dc, convert_color(cbg));
SetTextColor(dc, convert_color(cfg));
SelectObject(dc, font->handle);
ExtTextOutW(dc, x, y, ETO_OPAQUE, NULL, wstr, wsize, NULL);
}
static void
nk_gdi_clear(HDC dc, struct nk_color col)
{
COLORREF color = convert_color(col);
RECT rect = { 0, 0, gdi.width, gdi.height };
SetBkColor(dc, color);
ExtTextOutW(dc, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL);
}
static void
nk_gdi_blit(HDC dc)
{
BitBlt(dc, 0, 0, gdi.width, gdi.height, gdi.memory_dc, 0, 0, SRCCOPY);
}
GdiFont*
nk_gdifont_create(const char *name, int size)
{
TEXTMETRICW metric;
GdiFont *font = (GdiFont*)calloc(1, sizeof(GdiFont));
if (!font)
return NULL;
font->dc = CreateCompatibleDC(0);
font->handle = CreateFont(size, 0, 0, 0, FW_NORMAL, FALSE, FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, CLEARTYPE_QUALITY, DEFAULT_PITCH | FF_DONTCARE, name);
SelectObject(font->dc, font->handle);
GetTextMetricsW(font->dc, &metric);
font->height = metric.tmHeight;
return font;
}
static float
nk_gdifont_get_text_width(nk_handle handle, float height, const char *text, int len)
{
GdiFont *font = (GdiFont*)handle.ptr;
SIZE size;
int wsize;
WCHAR* wstr;
if (!font || !text)
return 0;
wsize = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
wstr = _alloca(wsize * sizeof(wchar_t));
MultiByteToWideChar(CP_UTF8, 0, text, len, wstr, wsize);
if (GetTextExtentPoint32W(font->dc, wstr, wsize, &size))
return (float)size.cx;
return -1.0f;
}
void
nk_gdifont_del(GdiFont *font)
{
if(!font) return;
DeleteObject(font->handle);
DeleteDC(font->dc);
free(font);
}
static void
nk_gdi_clipbard_paste(nk_handle usr, struct nk_text_edit *edit)
{
(void)usr;
if (IsClipboardFormatAvailable(CF_UNICODETEXT) && OpenClipboard(NULL))
{
HGLOBAL mem = GetClipboardData(CF_UNICODETEXT);
if (mem)
{
SIZE_T size = GlobalSize(mem) - 1;
if (size)
{
LPCWSTR wstr = (LPCWSTR)GlobalLock(mem);
if (wstr)
{
int utf8size = WideCharToMultiByte(CP_UTF8, 0, wstr, (int)(size / sizeof(wchar_t)), NULL, 0, NULL, NULL);
if (utf8size)
{
char* utf8 = malloc(utf8size);
if (utf8)
{
WideCharToMultiByte(CP_UTF8, 0, wstr, (int)(size / sizeof(wchar_t)), utf8, utf8size, NULL, NULL);
nk_textedit_paste(edit, utf8, utf8size);
free(utf8);
}
GlobalUnlock(mem);
}
}
}
}
CloseClipboard();
}
}
static void
nk_gdi_clipbard_copy(nk_handle usr, const char *text, int len)
{
if (OpenClipboard(NULL))
{
int wsize = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
if (wsize)
{
HGLOBAL mem = GlobalAlloc(GMEM_MOVEABLE, (wsize + 1) * sizeof(wchar_t));
if (mem)
{
wchar_t* wstr = GlobalLock(mem);
if (wstr)
{
MultiByteToWideChar(CP_UTF8, 0, text, len, wstr, wsize);
wstr[wsize] = 0;
GlobalUnlock(mem);
SetClipboardData(CF_UNICODETEXT, mem);
}
}
}
CloseClipboard();
}
}
NK_API struct nk_context*
nk_gdi_init(GdiFont *gdifont, HDC window_dc, unsigned int width, unsigned int height)
{
struct nk_user_font font;
font.userdata = nk_handle_ptr(gdifont);
font.height = (float)gdifont->height;
font.width = nk_gdifont_get_text_width;
gdi.bitmap = CreateCompatibleBitmap(window_dc, width, height);
gdi.window_dc = window_dc;
gdi.memory_dc = CreateCompatibleDC(window_dc);
gdi.width = width;
gdi.height = height;
SelectObject(gdi.memory_dc, gdi.bitmap);
nk_init_default(&gdi.ctx, &font);
gdi.ctx.clip.copy = nk_gdi_clipbard_copy;
gdi.ctx.clip.paste = nk_gdi_clipbard_paste;
return &gdi.ctx;
}
NK_API void
nk_gdi_set_font(GdiFont *gdifont)
{
struct nk_user_font font;
font.userdata = nk_handle_ptr(gdifont);
font.height = (float)gdifont->height;
font.width = nk_gdifont_get_text_width;
nk_style_set_font(&gdi.ctx, &font);
}
NK_API int
nk_gdi_handle_event(HWND wnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
switch (msg)
{
case WM_SIZE:
{
unsigned width = LOWORD(lparam);
unsigned height = LOWORD(lparam);
if (width != gdi.width || height != gdi.height)
{
DeleteObject(gdi.bitmap);
gdi.bitmap = CreateCompatibleBitmap(gdi.window_dc, width, height);
gdi.width = width;
gdi.height = height;
SelectObject(gdi.memory_dc, gdi.bitmap);
}
break;
}
case WM_PAINT:
{
PAINTSTRUCT paint;
HDC dc = BeginPaint(wnd, &paint);
nk_gdi_blit(dc);
EndPaint(wnd, &paint);
return 1;
}
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
{
int down = (lparam >> 31) & 1;
int ctrl = GetKeyState(VK_CONTROL) & (1 << 15);
switch (wparam)
{
case VK_SHIFT:
case VK_LSHIFT:
case VK_RSHIFT:
nk_input_key(&gdi.ctx, NK_KEY_SHIFT, down);
return 1;
case VK_DELETE:
nk_input_key(&gdi.ctx, NK_KEY_DEL, down);
return 1;
case VK_RETURN:
nk_input_key(&gdi.ctx, NK_KEY_ENTER, down);
return 1;
case VK_TAB:
nk_input_key(&gdi.ctx, NK_KEY_TAB, down);
return 1;
case VK_LEFT:
if (ctrl)
nk_input_key(&gdi.ctx, NK_KEY_TEXT_WORD_LEFT, down);
else
nk_input_key(&gdi.ctx, NK_KEY_LEFT, down);
return 1;
case VK_RIGHT:
if (ctrl)
nk_input_key(&gdi.ctx, NK_KEY_TEXT_WORD_RIGHT, down);
else
nk_input_key(&gdi.ctx, NK_KEY_RIGHT, down);
return 1;
case VK_BACK:
nk_input_key(&gdi.ctx, NK_KEY_BACKSPACE, down);
return 1;
case VK_HOME:
nk_input_key(&gdi.ctx, NK_KEY_TEXT_START, down);
return 1;
case VK_END:
nk_input_key(&gdi.ctx, NK_KEY_TEXT_END, down);
return 1;
case 'C':
if (ctrl) {
nk_input_key(&gdi.ctx, NK_KEY_COPY, down);
return 1;
}
break;
case 'V':
if (ctrl) {
nk_input_key(&gdi.ctx, NK_KEY_PASTE, down);
return 1;
}
break;
case 'X':
if (ctrl) {
nk_input_key(&gdi.ctx, NK_KEY_CUT, down);
return 1;
}
break;
case 'Z':
if (ctrl) {
nk_input_key(&gdi.ctx, NK_KEY_TEXT_UNDO, down);
return 1;
}
break;
case 'R':
if (ctrl) {
nk_input_key(&gdi.ctx, NK_KEY_TEXT_REDO, down);
return 1;
}
break;
}
return 0;
}
case WM_CHAR:
if (wparam >= 32)
{
nk_input_unicode(&gdi.ctx, (nk_rune)wparam);
return 1;
}
break;
case WM_LBUTTONDOWN:
nk_input_button(&gdi.ctx, NK_BUTTON_LEFT, (short)LOWORD(lparam), (short)HIWORD(lparam), 1);
SetCapture(wnd);
return 1;
case WM_LBUTTONUP:
nk_input_button(&gdi.ctx, NK_BUTTON_LEFT, (short)LOWORD(lparam), (short)HIWORD(lparam), 0);
ReleaseCapture();
return 1;
case WM_RBUTTONDOWN:
nk_input_button(&gdi.ctx, NK_BUTTON_RIGHT, (short)LOWORD(lparam), (short)HIWORD(lparam), 1);
SetCapture(wnd);
return 1;
case WM_RBUTTONUP:
nk_input_button(&gdi.ctx, NK_BUTTON_RIGHT, (short)LOWORD(lparam), (short)HIWORD(lparam), 0);
ReleaseCapture();
return 1;
case WM_MBUTTONDOWN:
nk_input_button(&gdi.ctx, NK_BUTTON_MIDDLE, (short)LOWORD(lparam), (short)HIWORD(lparam), 1);
SetCapture(wnd);
return 1;
case WM_MBUTTONUP:
nk_input_button(&gdi.ctx, NK_BUTTON_MIDDLE, (short)LOWORD(lparam), (short)HIWORD(lparam), 0);
ReleaseCapture();
return 1;
case WM_MOUSEWHEEL:
nk_input_scroll(&gdi.ctx, (float)(short)HIWORD(wparam) / WHEEL_DELTA);
return 1;
case WM_MOUSEMOVE:
nk_input_motion(&gdi.ctx, (short)LOWORD(lparam), (short)HIWORD(lparam));
return 1;
}
return 0;
}
NK_API void
nk_gdi_shutdown(void)
{
DeleteObject(gdi.memory_dc);
DeleteObject(gdi.bitmap);
nk_free(&gdi.ctx);
}
NK_API void
nk_gdi_render(struct nk_color clear)
{
const struct nk_command *cmd;
HDC memory_dc = gdi.memory_dc;
SelectObject(memory_dc, GetStockObject(DC_PEN));
SelectObject(memory_dc, GetStockObject(DC_BRUSH));
nk_gdi_clear(memory_dc, clear);
nk_foreach(cmd, &gdi.ctx)
{
switch (cmd->type) {
case NK_COMMAND_NOP: break;
case NK_COMMAND_SCISSOR: {
const struct nk_command_scissor *s =(const struct nk_command_scissor*)cmd;
nk_gdi_scissor(memory_dc, s->x, s->y, s->w, s->h);
} break;
case NK_COMMAND_LINE: {
const struct nk_command_line *l = (const struct nk_command_line *)cmd;
nk_gdi_stroke_line(memory_dc, l->begin.x, l->begin.y, l->end.x,
l->end.y, l->line_thickness, l->color);
} break;
case NK_COMMAND_RECT: {
const struct nk_command_rect *r = (const struct nk_command_rect *)cmd;
nk_gdi_stroke_rect(memory_dc, r->x, r->y, r->w, r->h,
(unsigned short)r->rounding, r->line_thickness, r->color);
} break;
case NK_COMMAND_RECT_FILLED: {
const struct nk_command_rect_filled *r = (const struct nk_command_rect_filled *)cmd;
nk_gdi_fill_rect(memory_dc, r->x, r->y, r->w, r->h,
(unsigned short)r->rounding, r->color);
} break;
case NK_COMMAND_CIRCLE: {
const struct nk_command_circle *c = (const struct nk_command_circle *)cmd;
nk_gdi_stroke_circle(memory_dc, c->x, c->y, c->w, c->h, c->line_thickness, c->color);
} break;
case NK_COMMAND_CIRCLE_FILLED: {
const struct nk_command_circle_filled *c = (const struct nk_command_circle_filled *)cmd;
nk_gdi_fill_circle(memory_dc, c->x, c->y, c->w, c->h, c->color);
} break;
case NK_COMMAND_TRIANGLE: {
const struct nk_command_triangle*t = (const struct nk_command_triangle*)cmd;
nk_gdi_stroke_triangle(memory_dc, t->a.x, t->a.y, t->b.x, t->b.y,
t->c.x, t->c.y, t->line_thickness, t->color);
} break;
case NK_COMMAND_TRIANGLE_FILLED: {
const struct nk_command_triangle_filled *t = (const struct nk_command_triangle_filled *)cmd;
nk_gdi_fill_triangle(memory_dc, t->a.x, t->a.y, t->b.x, t->b.y,
t->c.x, t->c.y, t->color);
} break;
case NK_COMMAND_POLYGON: {
const struct nk_command_polygon *p =(const struct nk_command_polygon*)cmd;
nk_gdi_stroke_polygon(memory_dc, p->points, p->point_count, p->line_thickness,p->color);
} break;
case NK_COMMAND_POLYGON_FILLED: {
const struct nk_command_polygon_filled *p = (const struct nk_command_polygon_filled *)cmd;
nk_gdi_fill_polygon(memory_dc, p->points, p->point_count, p->color);
} break;
case NK_COMMAND_POLYLINE: {
const struct nk_command_polyline *p = (const struct nk_command_polyline *)cmd;
nk_gdi_stroke_polyline(memory_dc, p->points, p->point_count, p->line_thickness, p->color);
} break;
case NK_COMMAND_TEXT: {
const struct nk_command_text *t = (const struct nk_command_text*)cmd;
nk_gdi_draw_text(memory_dc, t->x, t->y, t->w, t->h,
(const char*)t->string, t->length,
(GdiFont*)t->font->userdata.ptr,
t->background, t->foreground);
} break;
case NK_COMMAND_CURVE: {
const struct nk_command_curve *q = (const struct nk_command_curve *)cmd;
nk_gdi_stroke_curve(memory_dc, q->begin, q->ctrl[0], q->ctrl[1],
q->end, q->line_thickness, q->color);
} break;
case NK_COMMAND_RECT_MULTI_COLOR:
case NK_COMMAND_IMAGE:
case NK_COMMAND_ARC:
case NK_COMMAND_ARC_FILLED:
default: break;
}
}
nk_gdi_blit(gdi.window_dc);
nk_clear(&gdi.ctx);
}

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demo/gdi/nuklear_gdi.h Normal file
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#ifndef NK_GDI_H_
#define NK_GDI_H_
#include "../../nuklear.h"
typedef struct GdiFont GdiFont;
NK_API struct nk_context* nk_gdi_init(GdiFont *font, HDC window_dc, unsigned int width, unsigned int height);
NK_API void nk_gdi_set_font(GdiFont *font);
NK_API int nk_gdi_handle_event(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam);
NK_API void nk_gdi_render(struct nk_color clear);
NK_API void nk_gdi_shutdown(void);
/* font */
NK_API GdiFont* nk_gdifont_create(const char *name, int size);
NK_API void nk_gdifont_del(GdiFont *font);
#endif