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Day 4 complete

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Going to have to fork win32 modular headers lib, they didn't do handle declares proper.

So far so good. Made a funny looking gradient
This commit is contained in:
Edward R. Gonzalez 2023-09-09 03:03:03 -04:00
parent 4c832f3353
commit 973936ac82
5 changed files with 181 additions and 55 deletions
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14
project/dependencies/windows/windows_base.h
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@ -214,6 +214,8 @@ typedef double LONGLONG;
typedef double ULONGLONG;
#endif
#define DECLARE_HANDLE(name) struct name##__{int unused;}; typedef struct name##__ *name
typedef void VOID;
typedef void * PVOID;
typedef void * LPVOID;
@ -225,17 +227,15 @@ typedef LONG * LPLONG;
typedef DWORD * PDWORD;
typedef LPVOID HANDLE;
typedef HANDLE HINSTANCE;
typedef HANDLE HWND;
DECLARE_HANDLE(HINSTANCE);
DECLARE_HANDLE(HWND);
typedef HINSTANCE HMODULE;
typedef HANDLE HDC;
typedef HANDLE HGLRC;
typedef HANDLE HMENU;
DECLARE_HANDLE(HDC);
DECLARE_HANDLE(HGLRC);
DECLARE_HANDLE(HMENU);
typedef HANDLE * PHANDLE;
typedef HANDLE * LPHANDLE;
#define DECLARE_HANDLE(name) struct name##__{int unused;}; typedef struct name##__ *name
typedef WCHAR * PWSTR;
typedef BYTE * LPBYTE;
typedef long * LPLONG;

175
project/handmade_win32.cpp
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@ -12,6 +12,8 @@
#include "macros.h"
#include "types.h"
#include <stdio.h>
#include "win32.h"
NS_WIN32_BEGIN
@ -20,8 +22,63 @@ global bool Running;
global BITMAPINFO ScreenBitmapInfo;
global void* ScreenBitmapMemory; // Lets use directly mess with the "pixel's memory buffer"
global HBITMAP ScreenBitmapHandle;
global HDC ScreenDeviceContext;
global u32 BitmapWidth;
global u32 BitmapHeight;
constexpr u32 BytesPerPixel = 4;
internal void
render_weird_graident( u32 x_offset, u32 y_offset )
{
struct Pixel {
u8 Blue;
u8 Green;
u8 Red;
u8 Alpha;
};
u32 pitch = BitmapWidth * BytesPerPixel;
u8* row = rcast( u8*, ScreenBitmapMemory);
local_persist float wildcard = 0;
for ( u32 y = 0; y < BitmapHeight; ++ y )
{
// u8* pixel = rcast(u8*, row);
// Pixel* pixel = rcast( Pixel*, row );
u32* pixel = rcast(u32*, row);
for ( u32 x = 0; x < BitmapWidth; ++ x )
{
/* Pixel in memory:
-----------------------------------------------
Pixel + 0 Pixel + 1 Pixel + 2 Pixel + 3
RR GG GG XX
-----------------------------------------------
x86-64 : Little Endian Arch
0x XX BB GG RR
*/
// pixel[0] = scast(u8, x + x_offset);
// pixel[1] = scast(u8, y + y_offset);
// pixel[2] = 0;
// pixel[3] = 0;
// pixel->Blue = scast(u8, x + x_offset * u8(wildcard) % 256);
// pixel->Green = scast(u8, y + y_offset - u8(wildcard) % 128);
// pixel->Red = scast(u8, wildcard) % 256 - x * 0.1f;
// pixel->Alpha = 0;
// ++pixel;
// pixel += BytesPerPixel;
u8 blue = scast(u8, x + x_offset * u8(wildcard) % 256);
u8 green = scast(u8, y + y_offset - u8(wildcard) % 128);
u8 red = scast(u8, wildcard) % 256 - x * 0.4f;
*pixel++ = (red << 16) | (green << 8) | blue;
}
// wildcard += 0.001f;
wildcard += .25f * 0.5;
row += pitch;
}
}
internal void
resize_dib_section( u32 width, u32 height )
@ -30,45 +87,71 @@ resize_dib_section( u32 width, u32 height )
// TODO(Ed) : Free DIB section
if ( ScreenBitmapHandle )
if ( ScreenBitmapMemory )
{
DeleteObject( ScreenBitmapHandle );
}
if ( ! ScreenDeviceContext )
{
ScreenDeviceContext = CreateCompatibleDC( 0 );
VirtualFree( ScreenBitmapMemory, 0, MEM_RELEASE );
}
constexpr BITMAPINFOHEADER& header = ScreenBitmapInfo.bmiHeader;
header.biSize = sizeof( header );
header.biWidth = width;
header.biHeight = height;
header.biPlanes = 1;
header.biBitCount = 32; // Need 24, but want 32 ( alignment )
header.biCompression = BI_RGB_Uncompressed;
header.biSizeImage = 0;
header.biXPelsPerMeter = 0;
header.biYPelsPerMeter = 0;
header.biClrUsed = 0;
header.biClrImportant = 0;
BitmapWidth = width;
BitmapHeight = height;
// Negative means top-down in the context of the biHeight
# define Top_Down -
constexpr BITMAPINFOHEADER&
header = ScreenBitmapInfo.bmiHeader;
ScreenBitmapInfo.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
ScreenBitmapInfo.bmiHeader.biWidth = BitmapWidth;
ScreenBitmapInfo.bmiHeader.biHeight = Top_Down BitmapHeight;
ScreenBitmapInfo.bmiHeader.biPlanes = 1;
ScreenBitmapInfo.bmiHeader.biBitCount = 32; // Need 24, but want 32 ( alignment )
ScreenBitmapInfo.bmiHeader.biCompression = BI_RGB_Uncompressed;
// ScreenBitmapInfo.bmiHeader.biSizeImage = 0;
// ScreenBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
// ScreenBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
// ScreenBitmapInfo.bmiHeader.biClrUsed = 0;
// ScreenBitmapInfo.bmiHeader.biClrImportant = 0;
# undef Top_Down
#if 0
ScreenBitmapHandle = CreateDIBSection( ScreenDeviceContext, & ScreenBitmapInfo
, DIB_ColorTable_RGB, & ScreenBitmapMemory
// Ignoring these last two
, 0, 0 );
#endif
// ReleaseContext( 0, ScreenDeviceContext );
// We want to "touch" a pixel on every 4-byte boundary
u32 BitmapMemorySize = (BitmapWidth * BitmapHeight) * BytesPerPixel;
ScreenBitmapMemory = VirtualAlloc( NULL, BitmapMemorySize, MEM_COMMIT, PAGE_READWRITE );
// TODO(Ed) : Clear to black
}
internal void
update_window( HDC device_context
update_window( HDC device_context, RECT* WindowRect
, u32 x, u32 y
, u32 width, u32 height )
{
#if 0
BitBlt( device_context
, x, y, width, height
, ScreenDeviceContext
, x, y, RO_Source_To_Dest
);
#else
u32 window_width = WindowRect->right - WindowRect->left;
u32 window_height = WindowRect->bottom - WindowRect->top;
StretchDIBits( device_context
#if 0
, x, y, width, height
, x, y, width, height
#endif
, 0, 0, BitmapWidth, BitmapHeight
, 0, 0, window_width, window_height
, ScreenBitmapMemory, & ScreenBitmapInfo
, DIB_ColorTable_RGB, RO_Source_To_Dest );
#endif
}
LRESULT CALLBACK
@ -107,17 +190,17 @@ main_window_callback(
{
PAINTSTRUCT info;
HDC device_context = BeginPaint( handle, & info );
u32 x = info.rcPaint.left;
u32 y = info.rcPaint.top;
u32 height = info.rcPaint.bottom - info.rcPaint.top;
u32 width = info.rcPaint.right - info.rcPaint.left;
u32 height = info.rcPaint.bottom - info.rcPaint.top;
update_window( handle
RECT client_rect;
GetClientRect( handle, & client_rect );
update_window( device_context, & client_rect
, x, y
, width, height );
EndPaint( handle, & info );
}
break;
@ -131,13 +214,11 @@ main_window_callback(
u32 height = client_rect.bottom - client_rect.top;
resize_dib_section( width, height );
OutputDebugStringA( "WM_SIZE\n" );
}
break;
default:
{
OutputDebugStringA( "default\n" );
result = DefWindowProc( handle, system_messages, w_param, l_param );
}
}
@ -155,7 +236,7 @@ WinMain(
)
{
using namespace win32;
MessageBox( 0, L"First message!", L"Handmade Hero", MB_Ok_Btn | MB_Icon_Information );
// MessageBox( 0, L"First message!", L"Handmade Hero", MB_Ok_Btn | MB_Icon_Information );
WNDCLASS window_class {};
window_class.style = CS_Own_Device_Context | CS_Horizontal_Redraw | CS_Vertical_Redraw;
@ -169,7 +250,7 @@ WinMain(
window_class.lpszMenuName = L"Handmade Hero!";
window_class.lpszClassName = L"HandmadeHeroWindowClass";
if ( RegisterClassW( &window_class ) )
if ( RegisterClassW( & window_class ) )
{
HWND window_handle = CreateWindowExW(
0,
@ -186,20 +267,36 @@ WinMain(
{
Running = true;
MSG message;
MSG msg_info;
u32 x_offset = 0;
u32 y_offset = 0;
while( Running )
{
BOOL msg_result = GetMessage( & message, 0, 0, 0 );
if ( msg_result > 0 )
if ( PeekMessageW( & msg_info, 0, 0, 0, PM_Remove_Messages_From_Queue ) )
{
TranslateMessage( & message );
DispatchMessage( & message );
}
else
if ( msg_info.message == WM_QUIT )
{
// TODO(Ed) : Logging
break;
OutputDebugStringA("WM_QUIT\n");
Running = false;
}
TranslateMessage( & msg_info );
DispatchMessage( & msg_info );
}
render_weird_graident( x_offset, y_offset );
RECT window_rect;
GetClientRect( window_handle, & window_rect );
HDC device_context = GetDC( window_handle );
u32 window_width = window_rect.right - window_rect.left;
u32 window_height = window_rect.bottom - window_rect.top;
update_window( device_context, & window_rect, 0, 0, window_width, window_height );
++ x_offset;
++ y_offset;
}
}
else

7
project/platform/macros.h
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@ -5,3 +5,10 @@
#define local_persist static // Local Persisting variables
#define api_c extern "C"
// Casting
#define ccast( Type, Value ) ( * const_cast< Type* >( & (Value) ) )
#define pcast( Type, Value ) ( * reinterpret_cast< Type* >( & ( Value ) ) )
#define rcast( Type, Value ) reinterpret_cast< Type >( Value )
#define scast( Type, Value ) static_cast< Type >( Value )

38
project/platform/win32.h
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@ -2,9 +2,13 @@
Alternative header for windows.h
*/
// #include <windows.h>
#include "windows/windows_base.h"
#include "windows/window.h"
#include "windows/file.h"
#include "windows/io.h"
// #ifdef Build_Debug
# include "windows/dbghelp.h"
// #endif
@ -127,8 +131,9 @@ PatBlt( HDC hdc
constexpr auto DispatchMessage = DispatchMessageA;
#endif // !UNICODE
#pragma region Message Function Templates
// From WinUser.h, modular headers lib doesn't have.
#pragma region WinUser
HDC WINAPI GetDC( HWND hWnd );
BOOL WINAPI
GetMessageA(
@ -159,7 +164,7 @@ GetMessageW(
#else
constexpr auto RegisterClass = RegisterClassA;
#endif // !UNICODE
#pragma endregion Message Function Templates
#pragma endregion WinUser
// Class Style Constants
// https://learn.microsoft.com/en-us/windows/win32/winmsg/about-window-classes
@ -192,12 +197,21 @@ enum MB : UINT
MB_Icon_Information = MB_ICONINFORMATION,
};
#define WM_ACTIVATEAPP 0x001C
enum WS : UINT
enum Mem : DWORD
{
WS_Overlapped_Window = WS_OVERLAPPEDWINDOW,
WS_Initially_Visible = WS_VISIBLE,
Mem_Commit_Zeroed = 0x00001000,
Mem_Reserve = 0x00002000,
Mem_Release = 0x00008000,
};
enum Page : DWORD
{
Page_Read_Write = 0x04,
};
enum PM : UINT
{
PM_Remove_Messages_From_Queue = PM_REMOVE,
};
enum RasterOps : DWORD
@ -207,6 +221,14 @@ enum RasterOps : DWORD
RO_Whiteness = (DWORD)0x00FF0062,
};
#define WM_ACTIVATEAPP 0x001C
enum WS : UINT
{
WS_Overlapped_Window = WS_OVERLAPPEDWINDOW,
WS_Initially_Visible = WS_VISIBLE,
};
WIN_LIBRARY_API_END
NS_WIN32_END

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scripts/handmade.rdbg Normal file
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