Unit GraphicsConsole
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Contents
Description
Ultibo Graphics Console interface unit
The Graphics console unit provides access to the underlying framebuffer device as a pixel interface that allows putting blocks (or rectangles) of pixel data on to the screen or getting rectangles of pixel data from the screen. Functions are also included to copy a rectangle from one part of the screen to another and to put text (with a specified font) on to the screen.
Most image formats either consist of, or can be decoded to, a block of data that is a number of horizontal rows each with a number of pixels (columns) with each pixel containing color information in a certain bit size (8/16/24/32) and format (RGB/BGR/RGBA etc).
If the data exists in memory as a single contiguous block with each row following directly after the previous row then that can be passed directly to the functions in this unit (eg GraphicsWindowDrawImage) to be drawn on the screen.
Many graphics libraries do image manipulation, rendering and compositing to a memory buffer in a form that is compatible with the functions in this unit so a complex image can be constructed in memory and then transferred to the screen in a single operation. This is sometimes referred to as a bit block transfer or BitBlt and is a very standard technique for rendering both text and images to a framebuffer device.
This unit extends the console unit by creating a new type of console window (WINDOW_MODE_GRAPHICS) and therefore allows both text console windows and graphics console windows to co-exist on the screen at once.
The functions in this unit cannot be used to draw on a text console window (WINDOW_MODE_TEXT) and vice versa the functions in the console unit cannot be used to draw on a graphics console window.
Like the console unit, the graphics console supports setting a viewport for a specified window to allow masking the area to be written to. However the graphics console does not support a tracking a cursor X and Y position. Setting a window as the default is also not supported since that functionality is purely intended to support the RTL functions for text output.
Graphics windows can only be created on console devices which have a mode of CONSOLE_MODE_PIXEL.
Notes: Unlike the Console unit, Graphics console coordinates are always based on pixels not characters. Graphics console coordinates begin at 0,0 and extend to Width - 1, Height - 1. Graphics Window coordinates X,Y are always based on pixels, beginning at 0,0 and extending to Cols - 1, Rows - 1.
Constants
None defined
Type definitions
Graphics window enumeration callback
TGraphicsWindowEnumerate = TConsoleWindowEnumerate;
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Graphics window types
PGraphicsWindow = ^TGraphicsWindow;
TGraphicsWindow = TConsoleWindow;
Class definitions
Graphic image
TGraphicImage = class(TObject)
private
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protected
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public
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Public variables
None defined
Function declarations
Initialization functions
procedure GraphicsConsoleInit;
Description: To be documented
| Note | None documented |
|---|
Graphics console functions
function GraphicsWindowCreate(Console:PConsoleDevice; Position:LongWord):TWindowHandle;
Description: Create a new Graphics window
| Console | The console device to create the new window on |
|---|---|
| Position | The console position to create the new window at (eg CONSOLE_POSITION_FULL) |
| Return | Handle to new Graphics window or INVALID_HANDLE_VALUE if the window could not be created |
function GraphicsWindowCreateEx(Console:PConsoleDevice; Font:TFontHandle; Size,State,Mode,Position:LongWord):TWindowHandle;
Description: Create a new Graphics window
| Console | The console device to create the new window on |
|---|---|
| Font | The handle of the default font for the new console window |
| Size | The size in bytes to allocate for the new window entry (Defaults to SizeOf(TGraphicsWindow)) |
| State | The state of the new console window (WINDOW_STATE_VISIBLE or WINDOW_STATE_INVISIBLE) |
| Mode | The mode of the new console window (Normally WINDOW_MODE_GRAPHICS) |
| Position | The console position to create the new window at (eg CONSOLE_POSITION_FULL) |
| Return | Handle to new Graphics window or INVALID_HANDLE_VALUE if the window could not be created |
function GraphicsWindowDestroy(Handle:TWindowHandle):LongWord; inline;
Description: Close and Destroy an existing console window
| Handle | The handle of the window to destroy |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowShow(Handle:TWindowHandle):LongWord; inline;
Description: Make an existing console window visible and show it on screen
| Handle | The handle of the window to show |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowHide(Handle:TWindowHandle):LongWord; inline;
Description: Make an existing console window invisible and hide it on screen
| Handle | The handle of the window to hide |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowFind(Console:PConsoleDevice; Position:LongWord):TWindowHandle; inline;
Description: Find an existing console window in the position specified
| Console | The console device to find the window on |
|---|---|
| Position | The window position to find (eg CONSOLE_POSITION_FULL) |
| Return | The handle of the existing window or INVALID_HANDLE_VALUE if not found |
function GraphicsWindowEnumerate(Console:PConsoleDevice; Callback:TGraphicsWindowEnumerate; Data:Pointer):LongWord; inline;
Description: Enumerate existing console windows on the specified console device
| Console | The console device to enumerate windows for |
|---|---|
| Callback | The function to call for each window enumerated |
| Data | A pointer to private data to be passed to the callback (Optional |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowCheckFlag(Handle:TWindowHandle; Flag:LongWord):Boolean; inline;
Description: Check an existing console window to determine if a flag is set or not
| Handle | The handle of the window to check |
|---|---|
| Flag | The window flag to check for (eg WINDOW_FLAG_LINE_WRAP) |
| Return | True if the flag is set, False if not set |
function GraphicsWindowGetMode(Handle:TWindowHandle):LongWord; inline;
Description: Get the window mode of an existing console window
| Handle | The handle of the window to get the mode for |
|---|---|
| Return | The window mode (eg WINDOW_MODE_GRAPHICS) |
function GraphicsWindowGetState(Handle:TWindowHandle):LongWord; inline;
Description: Get the window state of an existing console window
| Handle | The handle of the window to get the state for |
|---|---|
| Return | The window state (eg WINDOW_STATE_INVISIBLE) |
function GraphicsWindowGetPosition(Handle:TWindowHandle):LongWord; inline;
Description: Get the position of an existing console window
| Handle | The handle of the window to get the position for |
|---|---|
| Return | The window position (eg CONSOLE_POSITION_FULL) |
function GraphicsWindowSetPosition(Handle:TWindowHandle; Position:LongWord):LongWord;
Description: Set the position of an existing console window
| Handle | The handle of the window to set the position for |
|---|---|
| Position | The new window position to set |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | The function will return ERROR_INVALID_PARAMETER if another window exists at the position |
function GraphicsWindowGetMinX(Handle:TWindowHandle):LongWord;
Description: Get the current minimum X of the window viewport for an existing console window
| Handle | The handle of the window to get MinX for |
|---|---|
| Return | The minimum X value for the current window viewport |
| Note | For Graphics Console functions, X is based on screen pixels not characters |
function GraphicsWindowGetMinY(Handle:TWindowHandle):LongWord;
Description: Get the current minimum Y of the window viewport for an existing console window
| Handle | The handle of the window to get MinY for |
|---|---|
| Return | The minimum Y value for the current window viewport |
| Note | For Graphics Console functions, Y is based on screen pixels not characters |
function GraphicsWindowGetMaxX(Handle:TWindowHandle):LongWord;
Description: Get the current maximum X of the window viewport for an existing console window
| Handle | The handle of the window to get MaxX for |
|---|---|
| Return | The maximum X value for the current window viewport |
| Note | For Graphics Console functions, X is based on screen pixels not characters |
function GraphicsWindowGetMaxY(Handle:TWindowHandle):LongWord;
Description: Get the current maximum Y of the window viewport for an existing console window
| Handle | The handle of the window to get MaxY for |
|---|---|
| Return | The maximum Y value for the current window viewport |
| Note | For Graphics Console functions, Y is based on screen pixels not characters |
function GraphicsWindowGetRect(Handle:TWindowHandle):TConsoleRect; inline;
Description: Get the rectangle X1,Y1,X2,Y2 of the window viewport for an existing console window
| Handle | The handle of the window to get the rectangle for |
|---|---|
| Return | The rectangle of the current window viewport |
| Note | For Graphics Console functions, Rect is based on screen pixels not characters |
function GraphicsWindowSetRect(Handle:TWindowHandle; const ARect:TConsoleRect):LongWord; inline;
Description: Set the rectangle X1,Y1,X2,Y2 of the window viewport for an existing console window
| Handle | The handle of the window to set the rectangle for |
|---|---|
| Rect | The rectangle to set for the window viewport |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Rect is based on screen pixels not characters |
function GraphicsWindowResetRect(Handle:TWindowHandle):LongWord; inline;
Description: Reset the window viewport for an existing console window to the maximum size
| Handle | The handle of the window to reset the viewport for |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowGetViewport(Handle:TWindowHandle; var X1,Y1,X2,Y2:LongWord):LongWord;
Description: Get the X1,Y1,X2,Y2 of the window viewport for an existing console window
| Handle | The handle of the window to get the viewport for |
|---|---|
| X1 | The left edge of the current viewport |
| Y1 | The top edge of the current viewport |
| X2 | The right edge of the current viewport |
| Y2 | The bottom edge of the current viewport |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowSetViewport(Handle:TWindowHandle; X1,Y1,X2,Y2:LongWord):LongWord;
Description: Set the X1,Y1,X2,Y2 of the window viewport for an existing console window
| Handle | The handle of the window to get the viewport for |
|---|---|
| X1 | The left edge of the window viewport |
| Y1 | The top edge of the window viewport |
| X2 | The right edge of the window viewport |
| Y2 | The bottom edge of the window viewport |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowResetViewport(Handle:TWindowHandle):LongWord;
Description: Reset the window viewport for an existing console window to the maximum size
| Handle | The handle of the window to reset the viewport for |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowResetRect(Handle:TWindowHandle):LongWord; inline;
Description: Reset the window viewport for an existing console window to the maximum size
| Handle | The handle of the window to reset the viewport for |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowGetCols(Handle:TWindowHandle):LongWord;
Description: Get the current columns of the window viewport for an existing console window
| Handle | The handle of the window to get columns for |
|---|---|
| Return | The columns value for the current window viewport |
| Note | For Graphics Console functions, Columns is based on screen pixels not characters |
function GraphicsWindowGetRows(Handle:TWindowHandle):LongWord;
Description: Get the current rows of the window viewport for an existing console window
| Handle | The handle of the window to get rows for |
|---|---|
| Return | The rows value for the current window viewport |
| Note | For Graphics Console functions, Rows is based on screen pixels not characters |
function GraphicsWindowGetWidth(Handle:TWindowHandle):LongWord;
Description: Get the absolute width of an existing console window
| Handle | The handle of the window to get the width for |
|---|---|
| Return | The absolute width of the window |
| Note | For Graphics Console functions, Width is based on screen pixels not characters |
function GraphicsWindowGetHeight(Handle:TWindowHandle):LongWord;
Description: Get the absolute height of an existing console window
| Handle | The handle of the window to get the height for |
|---|---|
| Return | The absolute height of the window |
| Note | For Graphics Console functions, Height is based on screen pixels not characters |
function GraphicsWindowGetFormat(Handle:TWindowHandle):LongWord;
Description: Get the color format of an existing console window
| Handle | The handle of the window to get the format for |
|---|---|
| Return | The color format of the window (eg COLOR_FORMAT_ARGB32) |
function GraphicsWindowGetForecolor(Handle:TWindowHandle):LongWord;
Description: Get the current foreground color of an existing console window
| Handle | The handle of the window to get the foreground color for |
|---|---|
| Return | The foreground color of the window (eg COLOR_WHITE) |
function GraphicsWindowSetForecolor(Handle:TWindowHandle; Color:LongWord):LongWord;
Description: Set the current foreground color of an existing console window
| Handle | The handle of the window to set the foreground color for |
|---|---|
| Color | The foreground color to set (eg COLOR_WHITE) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowGetBackcolor(Handle:TWindowHandle):LongWord;
Description: Get the current background color of an existing console window
| Handle | The handle of the window to get the background color for |
|---|---|
| Return | The background color of the window (eg COLOR_BLACK) |
function GraphicsWindowSetBackcolor(Handle:TWindowHandle; Color:LongWord):LongWord;
Description: Set the current background color of an existing console window
| Handle | The handle of the window to set the background color for |
|---|---|
| Color | The background color to set (eg COLOR_BLACK) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowGetFont(Handle:TWindowHandle):TFontHandle;
Description: Get the default font of an existing console window
| Handle | The handle of the window to get the default font for |
|---|---|
| Return | The font handle of the default font or INVALID_HANDLE_VALUE on error |
function GraphicsWindowSetFont(Handle:TWindowHandle; Font:TFontHandle):LongWord;
Description: Set the default font of an existing console window
| Handle | The handle of the window to set the default font for |
|---|---|
| Font | The font handle of the default font to set |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowClear(Handle:TWindowHandle):LongWord;
Description: Clear the current viewport of an existing console window
| Handle | The handle of the window to clear |
|---|---|
| Return | ERROR_SUCCESS if completed or another error code on failure |
function GraphicsWindowClearEx(Handle:TWindowHandle; X1,Y1,X2,Y2,Color:LongWord):LongWord;
Description: Clear part of the the current viewport of an existing console window
| Handle | The handle of the window to clear |
|---|---|
| X1 | The left edge of the area to clear (relative to current viewport) |
| Y1 | The top edge of the area to clear (relative to current viewport) |
| X2 | The right edge of the area to clear (relative to current viewport) |
| Y2 | The bottom edge of the area to clear (relative to current viewport) |
| Color | The fill color for the area to clear (eg COLOR_WHITE) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawBox(Handle:TWindowHandle; X1,Y1,X2,Y2,Color,Width:LongWord):LongWord;
Description: Draw a rectangular box outline on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| X1 | The left edge of the box (relative to current viewport) |
| Y1 | The top edge of the box (relative to current viewport) |
| X2 | The right edge of the box (relative to current viewport) |
| Y2 | The bottom edge of the box (relative to current viewport) |
| Color | The color to draw with (eg COLOR_WHITE) |
| Width | The width of the box outline |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawLine(Handle:TWindowHandle; X1,Y1,X2,Y2,Color,Width:LongWord):LongWord;
Description: Draw a line on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| X1 | The left starting point of the line (relative to current viewport) |
| Y1 | The top starting point of the box (relative to current viewport) |
| X2 | The right ending point of the box (relative to current viewport) |
| Y2 | The bottom ending point of the box (relative to current viewport) |
| Color | The color to draw with (eg COLOR_WHITE) |
| Width | The width of the line |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawBlock(Handle:TWindowHandle; X1,Y1,X2,Y2,Color:LongWord):LongWord;
Description: Draw a rectangular filled block on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| X1 | The left edge of the block (relative to current viewport) |
| Y1 | The top edge of the block (relative to current viewport) |
| X2 | The right edge of the block (relative to current viewport) |
| Y2 | The bottom edge of the block (relative to current viewport) |
| Color | The color to draw with (eg COLOR_WHITE) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawChar(Handle:TWindowHandle; Ch:Char; X,Y:LongWord):LongWord;
Description: Draw a character on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| Ch | The character to draw |
| X | The left starting point of the character (relative to current viewport) |
| Y | The top starting point of the character (relative to current viewport) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawCharEx(Handle:TWindowHandle; Font:TFontHandle; Ch:Char; X,Y,Forecolor,Backcolor:LongWord):LongWord;
Description: Draw a character on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| Font | The handle of the font to draw the character with |
| Ch | The character to draw |
| X | The left starting point of the character (relative to current viewport) |
| Y | The top starting point of the character (relative to current viewport) |
| Forecolor | The foreground color for the character (eg COLOR_WHITE) |
| Backcolor | The background color for the character (eg COLOR_BLACK) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawText(Handle:TWindowHandle; const Text:String; X,Y:LongWord):LongWord;
Description: Draw a text string on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| Text | The text to draw |
| X | The left starting point of the text (relative to current viewport) |
| Y | The top starting point of the text (relative to current viewport) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawTextEx(Handle:TWindowHandle; Font:TFontHandle; const Text:String; X,Y,Forecolor,Backcolor:LongWord):LongWord;
Description: Draw a text string on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| Font | The handle of the font to draw the text with |
| Text | The text to draw |
| X | The left starting point of the text (relative to current viewport) |
| Y | The top starting point of the text (relative to current viewport) |
| Forecolor | The foreground color for the text (eg COLOR_WHITE) |
| Backcolor | The background color for the text (eg COLOR_BLACK) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawPixel(Handle:TWindowHandle; X,Y,Color:LongWord):LongWord;
Description: Draw a single pixel on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| X | The column for the pixel (relative to current viewport) |
| Y | The row for the pixel (relative to current viewport) |
| Color | The color for the pixel (eg COLOR_WHITE) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowDrawImage(Handle:TWindowHandle; X,Y:LongWord; Image:Pointer; Width,Height,Format:LongWord):LongWord;
Description: Draw an image on an existing console window
| Handle | The handle of the window to draw on |
|---|---|
| X | The left starting point of the image (relative to current viewport) |
| Y | The top starting point of the image (relative to current viewport) |
| Image | Pointer to the image data in a contiguous block of pixel rows |
| Width | The width in pixels of a row in the image data |
| Height | The height in pixels of all rows in the image data |
| Format | The color format of the image data (eg COLOR_FORMAT_ARGB32) Pass COLOR_FORMAT_UNKNOWN to use the window format |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowGetPixel(Handle:TWindowHandle; X,Y:LongWord):LongWord;
Description: Get a single pixel from an existing console window
| Handle | The handle of the window to get from |
|---|---|
| X | The column of the pixel (relative to current viewport) |
| Y | The row of the pixel (relative to current viewport) |
| Return | The color of the pixel at X,Y (eg COLOR_WHITE) |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowGetImage(Handle:TWindowHandle; X,Y:LongWord; Image:Pointer; Width,Height,Format:LongWord):LongWord;
Description: Get an image from an existing console window
| Handle | The handle of the window to get from |
|---|---|
| X | The left starting point of the image (relative to current viewport) |
| Y | The top starting point of the image (relative to current viewport) |
| Image | Pointer to a block of memory large enough to hold the image in a contiguous block of pixel rows |
| Width | The width in pixels of a row of the image |
| Height | The height in pixels of all rows of the image |
| Format | The color format to store in the image data (eg COLOR_FORMAT_ARGB32) Pass COLOR_FORMAT_UNKNOWN to use the window format |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowCopyImage(Handle:TWindowHandle; const Source,Dest:TConsolePoint; Width,Height:LongWord):LongWord; inline;
Description: Copy an image from one place to another in a existing console window
| Handle | The handle of the window to copy from and to |
|---|---|
| Source | The starting point (X,Y) to copy the image from |
| Dest | The starting point (X,Y) to copy the image to |
| Width | The width in pixels of each row of the image |
| Height | The height in pixels of all rows of the image |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowMoveImage(Handle:TWindowHandle; const Source,Dest:TConsolePoint; Width,Height,Fillcolor:LongWord):LongWord;
Description: Move an image from one place to another in a existing console window
| Handle | The handle of the window to copy from and to |
|---|---|
| Source | The starting point (X,Y) to copy the image from |
| Dest | The starting point (X,Y) to copy the image to |
| Width | The width in pixels of each row of the image |
| Height | The height in pixels of all rows of the image |
| Fillcolor | The color to fill the area where the image was moved from (COLOR_NONE for no fill, same as copy) |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowImageSize(Handle:TWindowHandle; Width,Height,Format,Stride:LongWord):LongWord;
Description: Calculate the size in bytes of an image that is Width by Height in the color format specified
| Handle | The handle of the window for the image |
|---|---|
| Width | The width of the image in pixels |
| Height | The height of the image in pixels |
| Format | The color format to use for the calculation (eg COLOR_FORMAT_ARGB32) Pass COLOR_FORMAT_UNKNOWN to use the window format |
| Stride | The distance in bytes between each row of pixels (Optional) |
| Return | The size in bytes for an image of the specified size and format or 0 on error |
function GraphicsWindowImageFromStream(Handle:TWindowHandle; X,Y:LongWord; Stream:TStream; Width,Height,Format,Stride:LongWord; Invert:Boolean):LongWord;
Description: Draw an image to an existing console window from a supplied stream
| Handle | The handle of the window to draw on |
|---|---|
| X | The left starting point of the image (relative to current viewport) |
| Y | The top starting point of the image (relative to current viewport) |
| Stream | A stream containing the image data in a contiguous block of pixel rows |
| Width | The width in pixels of a row in the image data |
| Height | The height in pixels of all rows in the image data |
| Format | The color format of the image data (eg COLOR_FORMAT_ARGB32) Pass COLOR_FORMAT_UNKNOWN to use the window format |
| Stride | The distance in bytes between each row of pixels (Optional) |
| Invert | If True invert the image to the first row is the bottom and the last row is the top |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
function GraphicsWindowImageToStream(Handle:TWindowHandle; X,Y:LongWord; Stream:TStream; Width,Height,Format,Stride:LongWord; Invert:Boolean):LongWord;
Description: Get an image from an existing console window to a supplied stream
| Handle | The handle of the window to get from |
|---|---|
| X | The left starting point of the image (relative to current viewport) |
| Y | The top starting point of the image (relative to current viewport) |
| Stream | A stream large enough to hold the image in a contiguous block of pixel rows |
| Width | The width in pixels of a row of the image |
| Height | The height in pixels of all rows of the image |
| Format | The color format to store in the image data (eg COLOR_FORMAT_ARGB32) Pass COLOR_FORMAT_UNKNOWN to use the window format |
| Stride | The distance in bytes between each row of pixels (Optional) |
| Invert | If True invert the image to the first row is the bottom and the last row is the top |
| Return | ERROR_SUCCESS if completed or another error code on failure |
| Note | For Graphics Console functions, Viewport is based on screen pixels not characters |
Graphics console helper functions
function GraphicsWindowGetCount(Console:PConsoleDevice):LongWord; inline;
Description: Get the current console window count
| Console | The console device to get the window count for |
|---|---|
| Return | The current number of console windows on the specified console device |
function GraphicsWindowCheck(Console:PConsoleDevice; Window:PGraphicsWindow):PGraphicsWindow; inline;
Description: Check if a console window entry is valid
| Console | The console device to search for the window |
|---|---|
| Window | The window entry to check for validity |
| Return | The supplied window if successful or nil on failure |
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