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https://github.com/Ed94/HandmadeHero.git
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Day 5 complete
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@ -6,9 +6,9 @@ Any code I do for this series will be here.
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## Scripts
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* `build.ps1` - Builds the project use `.\scripts\build msvc` or `.\scripts\build clang`, add `release` to build in release mode
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* `build.ps1` - Builds the project use `.\scripts\build msvc` or `.\scripts\build clang`. Add `release` to build in release mode
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* `clean.ps1` - Cleans the project
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* `update.ps1` - Updates the project dependencies to their latest from their respective repos. (Not done automatically on build)
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* `update_deps.ps1` - Updates the project dependencies to their latest from their respective repos. (Not done automatically on build)
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## Notes
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@ -16,6 +16,6 @@ Building requires msvc or llvm's clang + lld, and powershell 7
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The build is done in two stages:
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1. Build and run metaprogram to scan and generate dependent code.
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1. ~~Build and run metaprogram to scan and generate dependent code.~~ (Not needed yet)
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2. Build the handmade hero runtime.
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@ -20,16 +20,41 @@ NS_WIN32_BEGIN
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// TODO(Ed) : This is a global for now.
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global bool Running;
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global BITMAPINFO ScreenBitmapInfo;
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global void* ScreenBitmapMemory; // Lets use directly mess with the "pixel's memory buffer"
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global u32 BitmapWidth;
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global u32 BitmapHeight;
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constexpr u32 BytesPerPixel = 4;
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struct OffscreenBuffer
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{
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BITMAPINFO Info;
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void* Memory; // Lets use directly mess with the "pixel's memory buffer"
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u32 Width;
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u32 Height;
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u32 Pitch;
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u32 BytesPerPixel;
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};
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struct WinDimensions
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{
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u32 Width;
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u32 Height;
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};
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global OffscreenBuffer BackBuffer;
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global WinDimensions WindowDimensions;
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WinDimensions get_window_dimensions( HWND window_handle )
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{
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RECT client_rect;
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GetClientRect( window_handle, & client_rect );
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WinDimensions result;
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result.Width = client_rect.right - client_rect.left;
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result.Height = client_rect.bottom - client_rect.top;
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return result;
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}
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internal void
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render_weird_graident( u32 x_offset, u32 y_offset )
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render_weird_graident(OffscreenBuffer buffer, u32 x_offset, u32 y_offset )
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{
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// TODO(Ed): See if with optimizer if buffer should be passed by value.
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struct Pixel {
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u8 Blue;
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u8 Green;
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@ -37,15 +62,14 @@ render_weird_graident( u32 x_offset, u32 y_offset )
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u8 Alpha;
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};
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u32 pitch = BitmapWidth * BytesPerPixel;
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u8* row = rcast( u8*, ScreenBitmapMemory);
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u8* row = rcast( u8*, buffer.Memory);
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local_persist float wildcard = 0;
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for ( u32 y = 0; y < BitmapHeight; ++ y )
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for ( u32 y = 0; y < buffer.Height; ++ y )
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{
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// u8* pixel = rcast(u8*, row);
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// Pixel* pixel = rcast( Pixel*, row );
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u32* pixel = rcast(u32*, row);
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for ( u32 x = 0; x < BitmapWidth; ++ x )
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for ( u32 x = 0; x < buffer.Width; ++ x )
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{
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/* Pixel in memory:
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-----------------------------------------------
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@ -55,103 +79,76 @@ render_weird_graident( u32 x_offset, u32 y_offset )
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x86-64 : Little Endian Arch
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0x XX BB GG RR
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*/
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// pixel[0] = scast(u8, x + x_offset);
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// pixel[1] = scast(u8, y + y_offset);
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// pixel[2] = 0;
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// pixel[3] = 0;
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// pixel->Blue = scast(u8, x + x_offset * u8(wildcard) % 256);
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// pixel->Green = scast(u8, y + y_offset - u8(wildcard) % 128);
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// pixel->Red = scast(u8, wildcard) % 256 - x * 0.1f;
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// pixel->Alpha = 0;
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// ++pixel;
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// pixel += BytesPerPixel;
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#if 1
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u8 blue = scast(u8, x + x_offset * u8(wildcard) % 256);
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u8 green = scast(u8, y + y_offset - u8(wildcard) % 128);
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u8 red = scast(u8, wildcard) % 256 - x * 0.4f;
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#else
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u8 blue = scast(u8, x + x_offset);
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u8 green = scast(u8, y + y_offset);
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u8 red = 0;
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#endif
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*pixel++ = (red << 16) | (green << 8) | blue;
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}
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// wildcard += 0.001f;
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wildcard += .25f * 0.5;
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row += pitch;
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wildcard += 0.5375f;
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row += buffer.Pitch;
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}
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}
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internal void
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resize_dib_section( u32 width, u32 height )
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resize_dib_section( OffscreenBuffer* buffer, u32 width, u32 height )
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{
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// TODO(Ed) : Bulletproof memory handling here for the bitmap memory
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// TODO(Ed) : Free DIB section
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if ( ScreenBitmapMemory )
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if ( buffer->Memory )
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{
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VirtualFree( ScreenBitmapMemory, 0, MEM_RELEASE );
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VirtualFree( buffer->Memory, 0, MEM_RELEASE );
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}
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BitmapWidth = width;
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BitmapHeight = height;
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buffer->Width = width;
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buffer->Height = height;
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buffer->BytesPerPixel = 4;
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buffer->Pitch = buffer->Width * buffer->BytesPerPixel;
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// Negative means top-down in the context of the biHeight
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# define Top_Down -
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constexpr BITMAPINFOHEADER&
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header = ScreenBitmapInfo.bmiHeader;
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ScreenBitmapInfo.bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
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ScreenBitmapInfo.bmiHeader.biWidth = BitmapWidth;
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ScreenBitmapInfo.bmiHeader.biHeight = Top_Down BitmapHeight;
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ScreenBitmapInfo.bmiHeader.biPlanes = 1;
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ScreenBitmapInfo.bmiHeader.biBitCount = 32; // Need 24, but want 32 ( alignment )
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ScreenBitmapInfo.bmiHeader.biCompression = BI_RGB_Uncompressed;
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// ScreenBitmapInfo.bmiHeader.biSizeImage = 0;
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// ScreenBitmapInfo.bmiHeader.biXPelsPerMeter = 0;
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// ScreenBitmapInfo.bmiHeader.biYPelsPerMeter = 0;
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// ScreenBitmapInfo.bmiHeader.biClrUsed = 0;
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// ScreenBitmapInfo.bmiHeader.biClrImportant = 0;
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BITMAPINFOHEADER&
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header = buffer->Info.bmiHeader;
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header.biSize = sizeof( buffer->Info.bmiHeader );
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header.biWidth = buffer->Width;
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header.biHeight = Top_Down buffer->Height;
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header.biPlanes = 1;
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header.biBitCount = 32; // Need 24, but want 32 ( alignment )
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header.biCompression = BI_RGB_Uncompressed;
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// header.biSizeImage = 0;
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// header.biXPelsPerMeter = 0;
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// header.biYPelsPerMeter = 0;
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// header.biClrUsed = 0;
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// header.biClrImportant = 0;
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# undef Top_Down
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#if 0
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ScreenBitmapHandle = CreateDIBSection( ScreenDeviceContext, & ScreenBitmapInfo
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, DIB_ColorTable_RGB, & ScreenBitmapMemory
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// Ignoring these last two
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, 0, 0 );
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#endif
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// ReleaseContext( 0, ScreenDeviceContext );
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// We want to "touch" a pixel on every 4-byte boundary
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u32 BitmapMemorySize = (BitmapWidth * BitmapHeight) * BytesPerPixel;
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ScreenBitmapMemory = VirtualAlloc( NULL, BitmapMemorySize, MEM_COMMIT, PAGE_READWRITE );
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u32 BitmapMemorySize = (buffer->Width * buffer->Height) * buffer->BytesPerPixel;
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buffer->Memory = VirtualAlloc( NULL, BitmapMemorySize, MEM_Commit_Zeroed, Page_Read_Write );
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// TODO(Ed) : Clear to black
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}
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internal void
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update_window( HDC device_context, RECT* WindowRect
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display_buffer_in_window( HDC device_context, u32 window_width, u32 window_height, OffscreenBuffer buffer
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, u32 x, u32 y
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, u32 width, u32 height )
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{
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#if 0
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BitBlt( device_context
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, x, y, width, height
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, ScreenDeviceContext
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, x, y, RO_Source_To_Dest
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);
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#else
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u32 window_width = WindowRect->right - WindowRect->left;
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u32 window_height = WindowRect->bottom - WindowRect->top;
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// TODO(Ed) : Aspect ratio correction
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StretchDIBits( device_context
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#if 0
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, x, y, width, height
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, x, y, width, height
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#endif
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, 0, 0, BitmapWidth, BitmapHeight
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, 0, 0, window_width, window_height
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, ScreenBitmapMemory, & ScreenBitmapInfo
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, 0, 0, buffer.Width, buffer.Height
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, buffer.Memory, & buffer.Info
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, DIB_ColorTable_RGB, RO_Source_To_Dest );
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#endif
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}
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LRESULT CALLBACK
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@ -195,10 +192,9 @@ main_window_callback(
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u32 width = info.rcPaint.right - info.rcPaint.left;
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u32 height = info.rcPaint.bottom - info.rcPaint.top;
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RECT client_rect;
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GetClientRect( handle, & client_rect );
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WinDimensions dimensions = get_window_dimensions( handle );
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update_window( device_context, & client_rect
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display_buffer_in_window( device_context, dimensions.Width, dimensions.Height, BackBuffer
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, x, y
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, width, height );
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EndPaint( handle, & info );
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@ -207,13 +203,6 @@ main_window_callback(
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case WM_SIZE:
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{
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RECT client_rect;
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GetClientRect( handle, & client_rect );
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u32 width = client_rect.right - client_rect.left;
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u32 height = client_rect.bottom - client_rect.top;
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resize_dib_section( width, height );
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}
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break;
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@ -239,7 +228,7 @@ WinMain(
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// MessageBox( 0, L"First message!", L"Handmade Hero", MB_Ok_Btn | MB_Icon_Information );
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WNDCLASS window_class {};
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window_class.style = CS_Own_Device_Context | CS_Horizontal_Redraw | CS_Vertical_Redraw;
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window_class.style = CS_Horizontal_Redraw | CS_Vertical_Redraw;
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window_class.lpfnWndProc = main_window_callback;
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// window_class.cbClsExtra = ;
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// window_class.cbWndExtra = ;
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@ -267,6 +256,9 @@ WinMain(
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{
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Running = true;
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WinDimensions dimensions = get_window_dimensions( window_handle );
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resize_dib_section( &BackBuffer, 1280, 720 );
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MSG msg_info;
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u32 x_offset = 0;
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@ -286,14 +278,13 @@ WinMain(
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DispatchMessage( & msg_info );
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}
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render_weird_graident( x_offset, y_offset );
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render_weird_graident( BackBuffer, x_offset, y_offset );
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RECT window_rect;
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GetClientRect( window_handle, & window_rect );
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WinDimensions dimensions = get_window_dimensions( window_handle );
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HDC device_context = GetDC( window_handle );
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u32 window_width = window_rect.right - window_rect.left;
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u32 window_height = window_rect.bottom - window_rect.top;
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update_window( device_context, & window_rect, 0, 0, window_width, window_height );
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display_buffer_in_window( device_context, dimensions.Width, dimensions.Height, BackBuffer
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, 0, 0
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, dimensions.Width, dimensions.Height );
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++ x_offset;
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++ y_offset;
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@ -199,9 +199,9 @@ enum MB : UINT
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enum Mem : DWORD
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{
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Mem_Commit_Zeroed = 0x00001000,
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Mem_Reserve = 0x00002000,
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Mem_Release = 0x00008000,
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MEM_Commit_Zeroed = 0x00001000,
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MEM_Reserve = 0x00002000,
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MEM_Release = 0x00008000,
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};
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enum Page : DWORD
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@ -165,9 +165,7 @@ if ( $vendor -match "clang" )
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$flag_target_arch, $target_arch,
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$flag_wall,
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$flag_preprocess_non_intergrated,
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( $flag_define + 'GEN_TIME' ),
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( $flag_path_output + $object ),
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( $flag_include + $includes )
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( $flag_path_output + $object )
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)
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if ( $release -eq $false ) {
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$compiler_args += ( $flag_define + 'Build_Debug' )
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@ -178,8 +176,7 @@ if ( $vendor -match "clang" )
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$warning_ignores | ForEach-Object {
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$compiler_args += $flag_warning + $_
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}
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# $compiler_args += $flag_preprocess
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$compiler_args += $includes | ForEach-Object { $flag_include + $_ }
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$compiler_args += $flag_compile, $unit
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run-compiler $compiler $unit $compiler_args
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Binary file not shown.
@ -26,6 +26,7 @@ Move-Item -Path (Join-Path $path_temp "gen.hpp") -Destination $path_
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#endregion gencpp
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#region windows modular headers
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if ($false) {
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$repo = 'https://github.com/Leandros/WindowsHModular.git'
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Push-Location $path_temp
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@ -37,6 +38,7 @@ if ( -not(test-path $path_deps_windows)) {
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Copy-Item -Recurse .\WindowsHModular\include\win32\* $path_deps_windows
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Remove-Item (Get-ChildItem -Path $path_deps_windows -Exclude '*.h' -Recurse -Force)
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Pop-Location
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}
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#endregion windows modular headers
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Remove-Item $path_temp -Recurse -Force
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