Difference between revisions of "Unit uBitmap"

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----
 
----
  
−
'''Ultibo Bitmap utility unit'''
+
'''Ultibo Bitmap Utility unit'''
  
 
Functions to draw or save a standard bitmap image to or from an Ultibo graphics console window.  
 
Functions to draw or save a standard bitmap image to or from an Ultibo graphics console window.  
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These functions originally appeared in the Ultibo forum and examples of how to use them can be found there:
 
These functions originally appeared in the Ultibo forum and examples of how to use them can be found there:
 
   
 
   
−
DrawBitmap: https://ultibo.org/forum/viewtopic.php?f=13&t=312
+
* DrawBitmap - https://ultibo.org/forum/viewtopic.php?f=13&t=312
  
−
SaveBitmap: https://ultibo.org/forum/viewtopic.php?f=13&t=313
+
* SaveBitmap - https://ultibo.org/forum/viewtopic.php?f=13&t=313
  
 
=== Constants ===
 
=== Constants ===
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Handle'''
+
! Handle
 
| The handle of an existing graphics console window
 
| The handle of an existing graphics console window
 
|-
 
|-
−
! '''Filename'''
+
! Filename
 
| The name of the file to load the bitmap from
 
| The name of the file to load the bitmap from
 
|-
 
|-
−
! '''X'''
+
! X
 
| The column position for the left edge of the bitmap
 
| The column position for the left edge of the bitmap
 
|-
 
|-
−
! '''Y'''
+
! Y
 
| The row position for the top row of the bitmap
 
| The row position for the top row of the bitmap
 
|-
 
|-
−
! '''Return'''
+
! Return
−
| True if successful or False is an error occurred
+
| True if successful or False if an error occurred
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DrawBitmapFromStream(Handle:TWindowHandle; Stream:TStream; X,Y:LongWord):Boolean;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function for drawing a standard bitmap image onto an Ultibo graphics console window from a stream</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Handle
 +
| The handle of an existing graphics console window
 +
|-
 +
! Stream
 +
| A stream object containing the bitmap exactly as it would appear in a file (including the header etc)
 +
|-
 +
! X
 +
| The column position for the left edge of the bitmap
 +
|-
 +
! Y
 +
| The row position for the top row of the bitmap
 +
|-
 +
! Return
 +
| True if successful or False if an error occurred
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function DrawBitmapFromBuffer(Handle:TWindowHandle; const Buf; Len,X,Y:LongWord):Boolean;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function for drawing a standard bitmap image onto an Ultibo graphics console window from a memory buffer</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Handle
 +
| The handle of an existing graphics console window
 +
|-
 +
! Buf
 +
| A memory buffer containing the bitmap exactly as it would appear in a file (including the header etc)
 +
|-
 +
! X
 +
| The column position for the left edge of the bitmap
 +
|-
 +
! Y
 +
| The row position for the top row of the bitmap
 +
|-
 +
! Return
 +
| True if successful or False if an error occurred
 
|-
 
|-
 
|}
 
|}
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{| class="wikitable" style="font-size: 14px; background: white;"
 
{| class="wikitable" style="font-size: 14px; background: white;"
 
|-
 
|-
−
! '''Handle'''
+
! Handle
 
| The handle of an existing graphics console window
 
| The handle of an existing graphics console window
 
|-
 
|-
−
! '''Filename'''
+
! Filename
 
| The name of the file to save the bitmap to
 
| The name of the file to save the bitmap to
 
|-
 
|-
−
! '''X'''
+
! X
 
| The column position for the left edge of the bitmap
 
| The column position for the left edge of the bitmap
 
|-
 
|-
−
! '''Y'''
+
! Y
 
| The row position for the top row of the bitmap
 
| The row position for the top row of the bitmap
 
|-
 
|-
−
! '''Width'''
+
! Width
 
| The width (in pixels) of the bitmap
 
| The width (in pixels) of the bitmap
 
|-
 
|-
−
! '''Height'''
+
! Height
 
| The height (in pixels) of the bitmap
 
| The height (in pixels) of the bitmap
 
|-
 
|-
−
! '''BPP'''
+
! BPP
 
| The bits per pixel value for the bitmap (eg 16, 24 or 32)
 
| The bits per pixel value for the bitmap (eg 16, 24 or 32)
 
|-
 
|-
−
! '''Return'''
+
! Return
−
| True if successful or False is an error occurred
+
| True if successful or False if an error occurred
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function LoadBitmapToStream(const Filename:String; Stream:TStream; out Width,Height,Format:LongWord):Boolean;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function to extract a standard bitmap image into a stream object as a raw image and return the size and format</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Filename
 +
| The name of the file to load the bitmap from
 +
|-
 +
! Stream
 +
| A stream object to receive the extracted image
 +
|-
 +
! Width
 +
| The width in pixels of the extracted image
 +
|-
 +
! Height
 +
| The height in pixels of the extracted image
 +
|-
 +
! Format
 +
| The color format of the extracted image (eg COLOR_FORMAT_RGB24)
 +
|-
 +
! Return
 +
| True if successful or False if an error occurred
 +
|-
 +
|}
 +
</div></div>
 +
<br />
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
 +
<pre style="border: 0; padding-bottom:0px;">function LoadBitmapToBuffer(const Filename:String; var Buf; var Len:LongWord; out Width,Height,Format:LongWord):Boolean;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' A function to extract a standard bitmap image into a memory buffer as a raw image and return the size and format</div>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
! Filename
 +
| The name of the file to load the bitmap from
 +
|-
 +
! Buf
 +
| A memory buffer to receive the extracted image (Must be large enough to contain the extracted image)
 +
|-
 +
! Len
 +
| The size in bytes of the extracted image (Pass 0 to find how many bytes are required)
 +
|-
 +
! Width
 +
| The width in pixels of the extracted image
 +
|-
 +
! Height
 +
| The height in pixels of the extracted image
 +
|-
 +
! Format
 +
| The color format of the extracted image (eg COLOR_FORMAT_RGB24)
 +
|-
 +
! Return
 +
| True if successful or False if an error occurred
 
|-
 
|-
 
|}
 
|}

Latest revision as of 06:18, 31 August 2021

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Description

Ultibo Bitmap Utility unit

Functions to draw or save a standard bitmap image to or from an Ultibo graphics console window.

These functions originally appeared in the Ultibo forum and examples of how to use them can be found there:

Constants

None defined

Type definitions

None defined

Public variables

None defined

Function declarations


uBitmap functions 

function DrawBitmap(Handle:TWindowHandle; const Filename:String; X,Y:LongWord):Boolean;
Description: A function for drawing a standard bitmap image onto an Ultibo graphics console window
Handle The handle of an existing graphics console window
Filename The name of the file to load the bitmap from
X The column position for the left edge of the bitmap
Y The row position for the top row of the bitmap
Return True if successful or False if an error occurred 


function DrawBitmapFromStream(Handle:TWindowHandle; Stream:TStream; X,Y:LongWord):Boolean;
Description: A function for drawing a standard bitmap image onto an Ultibo graphics console window from a stream
Handle The handle of an existing graphics console window
Stream A stream object containing the bitmap exactly as it would appear in a file (including the header etc)
X The column position for the left edge of the bitmap
Y The row position for the top row of the bitmap
Return True if successful or False if an error occurred 


function DrawBitmapFromBuffer(Handle:TWindowHandle; const Buf; Len,X,Y:LongWord):Boolean;
Description: A function for drawing a standard bitmap image onto an Ultibo graphics console window from a memory buffer
Handle The handle of an existing graphics console window
Buf A memory buffer containing the bitmap exactly as it would appear in a file (including the header etc)
X The column position for the left edge of the bitmap
Y The row position for the top row of the bitmap
Return True if successful or False if an error occurred 


function SaveBitmap(Handle:TWindowHandle; const Filename:String; X,Y,Width,Height,BPP:LongWord):Boolean;
Description: A function for saving all or part of an Ultibo graphics console window to a standard bitmap file
Handle The handle of an existing graphics console window
Filename The name of the file to save the bitmap to
X The column position for the left edge of the bitmap
Y The row position for the top row of the bitmap
Width The width (in pixels) of the bitmap
Height The height (in pixels) of the bitmap
BPP The bits per pixel value for the bitmap (eg 16, 24 or 32)
Return True if successful or False if an error occurred 


function LoadBitmapToStream(const Filename:String; Stream:TStream; out Width,Height,Format:LongWord):Boolean;
Description: A function to extract a standard bitmap image into a stream object as a raw image and return the size and format
Filename The name of the file to load the bitmap from
Stream A stream object to receive the extracted image
Width The width in pixels of the extracted image
Height The height in pixels of the extracted image
Format The color format of the extracted image (eg COLOR_FORMAT_RGB24)
Return True if successful or False if an error occurred 


function LoadBitmapToBuffer(const Filename:String; var Buf; var Len:LongWord; out Width,Height,Format:LongWord):Boolean;
Description: A function to extract a standard bitmap image into a memory buffer as a raw image and return the size and format
Filename The name of the file to load the bitmap from
Buf A memory buffer to receive the extracted image (Must be large enough to contain the extracted image)
Len The size in bytes of the extracted image (Pass 0 to find how many bytes are required)
Width The width in pixels of the extracted image
Height The height in pixels of the extracted image
Format The color format of the extracted image (eg COLOR_FORMAT_RGB24)
Return True if successful or False if an error occurred


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