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<{CODE_COLLAPSE_OFF}><{CODE_WRAP_OFF}>

; OpenGL programming example

format PE64 GUI 5.0

entry start

include 'win64a.inc'

include 'opengl.inc'

MOD_WIN = 0x0008

MOD_NOREPEAT = 0x4000

section '.text' code readable executable

start:

sub rsp,8 ; Make stack dqword aligned

invoke GetModuleHandle,0

mov [wc.hInstance],rax

invoke LoadIcon,0,IDI_APPLICATION

mov [wc.hIcon],rax

invoke LoadCursor,0,IDC_ARROW

mov [wc.hCursor],rax

invoke RegisterClass,wc

invoke CreateWindowEx,0,_class,_title,WS_VISIBLE+WS_OVERLAPPEDWINDOW+WS_CLIPCHILDREN+WS_CLIPSIBLINGS,16,16,432,432,NULL,NULL,[wc.hInstance],NULL

msg_loop:

invoke GetMessage,addr msg,NULL,0,0

cmp eax,1

jb end_loop

jne msg_loop

invoke TranslateMessage,addr msg

invoke DispatchMessage,addr msg

jmp msg_loop

end_loop:

invoke ExitProcess,[msg.wParam]

proc WindowProc uses rbx rsi rdi, hwnd,wmsg,wparam,lparam

mov [hwnd],rcx

frame

cmp edx,WM_SIZE

je .wmsize

cmp edx,WM_PAINT

je .wmpaint

cmp edx,WM_KEYDOWN

je .wmkeydown

cmp edx,WM_HOTKEY

jz .wmhotkey

cmp edx,WM_DESTROY

je .wmdestroy

cmp edx,WM_CREATE

je .wmcreate

.defwndproc:

invoke DefWindowProc,rcx,rdx,r8,r9

jmp .finish

.wmcreate:

invoke GlobalAddAtom, addr szHotKeyName

mov [wHotKeyId], ax

invoke RegisterHotKey, [hwnd], [wHotKeyId], MOD_WIN or MOD_NOREPEAT, 0x5A

invoke GetDC,rcx

mov [hdc],rax

lea rdi,[pfd]

mov rcx,sizeof.PIXELFORMATDESCRIPTOR shr 3

xor eax,eax

rep stosq

mov [pfd.nSize],sizeof.PIXELFORMATDESCRIPTOR

mov [pfd.nVersion],1

mov [pfd.dwFlags],PFD_SUPPORT_OPENGL+PFD_DOUBLEBUFFER+PFD_DRAW_TO_WINDOW

mov [pfd.iLayerType],PFD_MAIN_PLANE

mov [pfd.iPixelType],PFD_TYPE_RGBA

mov [pfd.cColorBits],16

mov [pfd.cDepthBits],16

mov [pfd.cAccumBits],0

mov [pfd.cStencilBits],0

invoke ChoosePixelFormat,[hdc],addr pfd

invoke SetPixelFormat,[hdc],eax,addr pfd

invoke wglCreateContext,[hdc]

mov [hrc],rax

invoke wglMakeCurrent,[hdc],[hrc]

invoke GetClientRect,[hwnd],addr rc

invoke glViewport,0,0,[rc.right],[rc.bottom]

invoke GetTickCount

mov [clock],eax

xor eax,eax

jmp .finish

.wmsize:

invoke GetClientRect,[hwnd],addr rc

invoke glViewport,0,0,[rc.right],[rc.bottom]

xor eax,eax

jmp .finish

.wmpaint:

invoke GetTickCount

sub eax,[clock]

cmp eax,10

jb .animation_ok

add [clock],eax

invoke glRotatef,float [theta],float dword 0.0,float dword 0.0,float dword 1.0

.animation_ok:

invoke glClear,GL_COLOR_BUFFER_BIT

invoke glBegin,GL_QUADS

invoke glColor3f,float dword 1.0,float dword 0.1,float dword 0.1

invoke glVertex3d,float -0.6,float -0.6,float 0.0

invoke glColor3f,float dword 0.1,float dword 0.1,float dword 0.1

invoke glVertex3d,float 0.6,float -0.6,float 0.0

invoke glColor3f,float dword 0.1,float dword 0.1,float dword 1.0

invoke glVertex3d,float 0.6,float 0.6,float 0.0

invoke glColor3f,float dword 1.0,float dword 0.1,float dword 1.0

invoke glVertex3d,float -0.6,float 0.6,float 0.0

invoke glEnd

invoke SwapBuffers,[hdc]

xor eax,eax

jmp .finish

.wmhotkey:

invoke MessageBox, HWND_DESKTOP, "Hello", addr _title, MB_OK

jmp .finish

.wmkeydown:

cmp r8d,VK_ESCAPE

jne .defwndproc

.wmdestroy:

invoke wglMakeCurrent,0,0

invoke wglDeleteContext,[hrc]

invoke ReleaseDC,[hwnd],[hdc]

invoke UnregisterHotKey, [hwnd], [wHotKeyId]

invoke PostQuitMessage,0

xor eax,eax

.finish:

endf

ret

endp

section '.data' data readable writeable

_title db 'OpenGL example',0

_class db 'FASMOPENGL32',0

szHotKeyName db 'Win+Z hot key', 0

theta GLfloat 0.6

wc WNDCLASS 0,WindowProc,0,0,NULL,NULL,NULL,NULL,NULL,_class

hdc dq ?

hrc dq ?

msg MSG

rc RECT

pfd PIXELFORMATDESCRIPTOR

clock dd ?

wHotKeyId dw ?

section '.idata' import data readable writeable

library kernel,'KERNEL32.DLL',\

user,'USER32.DLL',\

gdi,'GDI32.DLL',\

opengl,'OPENGL32.DLL'

import kernel,\

GetModuleHandle,'GetModuleHandleA',\

GetTickCount,'GetTickCount',\

GlobalAddAtom, 'GlobalAddAtomA',\

ExitProcess,'ExitProcess'

import user,\

MessageBox, 'MessageBoxA',\

RegisterHotKey, 'RegisterHotKey',\

UnregisterHotKey, 'UnregisterHotKey',\

RegisterClass,'RegisterClassA',\

CreateWindowEx,'CreateWindowExA',\

DefWindowProc,'DefWindowProcA',\

GetMessage,'GetMessageA',\

TranslateMessage,'TranslateMessage',\

DispatchMessage,'DispatchMessageA',\

LoadCursor,'LoadCursorA',\

LoadIcon,'LoadIconA',\

GetClientRect,'GetClientRect',\

GetDC,'GetDC',\

ReleaseDC,'ReleaseDC',\

PostQuitMessage,'PostQuitMessage'

import gdi,\

ChoosePixelFormat,'ChoosePixelFormat',\

SetPixelFormat,'SetPixelFormat',\

SwapBuffers,'SwapBuffers'

import opengl,\

wglCreateContext,'wglCreateContext',\

wglMakeCurrent,'wglMakeCurrent',\

wglDeleteContext,'wglDeleteContext',\

glClear,'glClear',\

glBegin,'glBegin',\

glViewport,'glViewport',\

glRotatef,'glRotatef',\

glColor3f,'glColor3f',\

glVertex3d,'glVertex3d',\

glEnd,'glEnd'