Hardware images: Difference between revisions

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Latest revision as of 13:16, 19 November 2024

Hardware Images (QB64 version 1.000 and up)

QB64 can create hardware images using _LOADIMAGE files or _COPYIMAGE with mode 33 as the second parameter.
Hardware images can be displayed using _PUTIMAGE or _MAPTRIANGLE with special texture properties.
_COPYIMAGE mode 33 can convert images created by _NEWIMAGE, _LOADIMAGE or _SCREENIMAGE to hardware images.

Demonstration of the Advantages of Using Hardware Images

The first example uses software images while using between 20 - 30% processor power:

SCREEN _NEWIMAGE(640, 480, 32)

'create some software screens
scr_bg = _NEWIMAGE(640, 480, 32)
scr_fg = _NEWIMAGE(50, 50, 32)

'draw to the background one, and make a nice pattern
_DEST scr_bg
FOR i = 1 TO 100
    LINE (RND * 640, RND * 480)-(RND * 640, RND * 480), _RGBA32(RND * 255, RND * 255, RND * 255, RND * 255), BF
NEXT i

'then do the same thing for the foreground
_DEST scr_fg
LINE (0, 0)-(50, 50), _RGBA32(255, 255, 255, 200), BF

'set image destination to main screen
_DEST 0
DO
    CLS
    _PUTIMAGE , scr_bg
    _PUTIMAGE (x, y), scr_fg
    k = _KEYHIT
    SELECT CASE k
        CASE ASC("w"): y = y - 1
        CASE ASC("a"): x = x - 1
        CASE ASC("s"): y = y + 1
        CASE ASC("d"): x = x + 1
    END SELECT
    _DISPLAY 'render image after changes
    _LIMIT 30 'we're doing all this at 30 cycles/second
LOOP

Example by Johny B.

The second example converts the foreground and background software screens to hardware using 6-7% processor power:

SCREEN _NEWIMAGE(640, 480, 32)

'create some software screens
scr_bg = _NEWIMAGE(640, 480, 32)
scr_fg = _NEWIMAGE(50, 50, 32)

'draw to the background one, and make a nice pattern
_DEST scr_bg
FOR i = 1 TO 100
    LINE (RND * 640, RND * 480)-(RND * 640, RND * 480), _RGBA32(RND * 255, RND * 255, RND * 255, RND * 255), BF
NEXT i
'create a hardware screen version of the background
scrh_bg = _COPYIMAGE(scr_bg, 33)
_FREEIMAGE scr_bg 'we no longer need the software version in memory

'then do the same thing for the foreground
_DEST scr_fg
LINE (0, 0)-(50, 50), _RGBA32(255, 255, 255, 200), BF
'copy to hardware screen
scrh_fg = _COPYIMAGE(scr_fg, 33)
_FREEIMAGE scr_fg 'and free software screen from memory

'set image destination to main screen
_DEST 0
_DISPLAYORDER _HARDWARE 'do not even render the software layer, just the hardware one.
DO 'main program loop
    '_putimage knows these are hardware screens, so destination of 0 is taken as hardware layer
    _PUTIMAGE , scrh_bg
    _PUTIMAGE (x, y), scrh_fg
    'just some input processing
    k = _KEYHIT
    SELECT CASE k
        CASE ASC("w"): y = y - 1
        CASE ASC("a"): x = x - 1
        CASE ASC("s"): y = y + 1
        CASE ASC("d"): x = x + 1
    END SELECT
    _DISPLAY 'render image after changes
    _LIMIT 30 'we're doing all this at 30 cycles/second
LOOP

Example by Johny B.

QB64 Programming References

Wiki Pages Main Page with Articles and Tutorials QB64 specific keywords (alphabetical) Original QBasic keywords (alphabetical) QB64 OpenGL keywords (alphabetical) Keywords by Usage Got a question about something? Frequently Asked Questions about QB64 QB64 Phoenix Edition Community Forum Links to other QBasic Sites: Pete's QBasic Forum Pete's QBasic Downloads

Retrieved from "https://qb64phoenix.com/qb64wiki/index.php?title=Hardware_images&oldid=9233"

@@ Line 7: / Line 7: @@
 <center>'''Demonstration of the Advantages of Using Hardware Images'''</center>
-{{small|Examples by Johny B.}}
 : The first example uses software images while using between 20 - 30% processor power:
-{{CodeStart}}{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}(640, 480, 32)
+{{CodeStart}}
+{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|480|#F580B1}}, {{Text|32|#F580B1}})
-'create some software screens
+{{Text|<nowiki>'create some software screens</nowiki>|#919191}}
-scr_bg = {{Cl|_NEWIMAGE}}(640, 480, 32)
+scr_bg = {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|480|#F580B1}}, {{Text|32|#F580B1}})
-scr_fg = {{Cl|_NEWIMAGE}}(50, 50, 32)
+scr_fg = {{Cl|_NEWIMAGE}}({{Text|50|#F580B1}}, {{Text|50|#F580B1}}, {{Text|32|#F580B1}})
-'draw to the background one, and make a nice pattern
+{{Text|<nowiki>'draw to the background one, and make a nice pattern</nowiki>|#919191}}
 {{Cl|_DEST}} scr_bg
-{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} 100
+{{Cl|FOR}} i = {{Text|1|#F580B1}} {{Cl|TO}} {{Text|100|#F580B1}}
-     {{Cl|LINE}} ({{Cl|RND}} * 640, {{Cl|RND}} * 480)-({{Cl|RND}} * 640, {{Cl|RND}} * 480), {{Cl|_RGBA32}}({{Cl|RND}} * 255, {{Cl|RND}} * 255, {{Cl|RND}} * 255, {{Cl|RND}} * 255), BF
+     {{Cl|LINE}} ({{Cl|RND}} * {{Text|640|#F580B1}}, {{Cl|RND}} * {{Text|480|#F580B1}})-({{Cl|RND}} * {{Text|640|#F580B1}}, {{Cl|RND}} * {{Text|480|#F580B1}}), {{Cl|_RGBA32}}({{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}), BF
 {{Cl|NEXT}} i
-'then do the same thing for the foreground
+{{Text|<nowiki>'then do the same thing for the foreground</nowiki>|#919191}}
 {{Cl|_DEST}} scr_fg
-{{Cl|LINE}} (0, 0)-(50, 50), {{Cl|_RGBA32}}(255, 255, 255, 200), BF
+{{Cl|LINE}} ({{Text|0|#F580B1}}, {{Text|0|#F580B1}})-({{Text|50|#F580B1}}, {{Text|50|#F580B1}}), {{Cl|_RGBA32}}({{Text|255|#F580B1}}, {{Text|255|#F580B1}}, {{Text|255|#F580B1}}, {{Text|200|#F580B1}}), BF
-'set image destination to main screen
+{{Text|<nowiki>'set image destination to main screen</nowiki>|#919191}}
-{{Cl|_DEST}} 0
+{{Cl|_DEST}} {{Text|0|#F580B1}}
-DO
+{{Cl|DO}}
      {{Cl|CLS}}
      {{Cl|_PUTIMAGE}} , scr_bg
@@ Line 35: / Line 35: @@
      k = {{Cl|_KEYHIT}}
      {{Cl|SELECT CASE}} k
-         {{Cl|CASE}} {{Cl|ASC}}("w"): y = y - 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"w"</nowiki>|#FFB100}}): y = y - {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("a"): x = x - 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"a"</nowiki>|#FFB100}}): x = x - {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("s"): y = y + 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"s"</nowiki>|#FFB100}}): y = y + {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("d"): x = x + 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"d"</nowiki>|#FFB100}}): x = x + {{Text|1|#F580B1}}
      {{Cl|END SELECT}}
-     {{Cl|_DISPLAY}} 'render image after changes
+     {{Cl|_DISPLAY}} {{Text|<nowiki>'render image after changes</nowiki>|#919191}}
-     {{Cl|_LIMIT}} 30 'we're doing all this at 30 cycles/second
+     {{Cl|_LIMIT}} {{Text|30|#F580B1}} {{Text|<nowiki>'we're doing all this at 30 cycles/second</nowiki>|#919191}}
-LOOP
+{{Cl|LOOP}}
 {{CodeEnd}}
+{{Small|Example by Johny B.}}
 : The second example converts the foreground and background software screens to hardware using 6-7% processor power:
-{{CodeStart}}{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}(640, 480, 32)
+{{CodeStart}}
+{{Cl|SCREEN}} {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|480|#F580B1}}, {{Text|32|#F580B1}})
-'create some software screens
+{{Text|<nowiki>'create some software screens</nowiki>|#919191}}
-scr_bg = {{Cl|_NEWIMAGE}}(640, 480, 32)
+scr_bg = {{Cl|_NEWIMAGE}}({{Text|640|#F580B1}}, {{Text|480|#F580B1}}, {{Text|32|#F580B1}})
-scr_fg = {{Cl|_NEWIMAGE}}(50, 50, 32)
+scr_fg = {{Cl|_NEWIMAGE}}({{Text|50|#F580B1}}, {{Text|50|#F580B1}}, {{Text|32|#F580B1}})
-'draw to the background one, and make a nice pattern
+{{Text|<nowiki>'draw to the background one, and make a nice pattern</nowiki>|#919191}}
 {{Cl|_DEST}} scr_bg
-{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} 100
+{{Cl|FOR}} i = {{Text|1|#F580B1}} {{Cl|TO}} {{Text|100|#F580B1}}
-     {{Cl|LINE}} ({{Cl|RND}} * 640, {{Cl|RND}} * 480)-({{Cl|RND}} * 640, {{Cl|RND}} * 480), {{Cl|_RGBA32}}({{Cl|RND}} * 255, {{Cl|RND}} * 255, {{Cl|RND}} * 255, {{Cl|RND}} * 255), BF
+     {{Cl|LINE}} ({{Cl|RND}} * {{Text|640|#F580B1}}, {{Cl|RND}} * {{Text|480|#F580B1}})-({{Cl|RND}} * {{Text|640|#F580B1}}, {{Cl|RND}} * {{Text|480|#F580B1}}), {{Cl|_RGBA32}}({{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}, {{Cl|RND}} * {{Text|255|#F580B1}}), BF
 {{Cl|NEXT}} i
-'create a hardware screen version of the background
+{{Text|<nowiki>'create a hardware screen version of the background</nowiki>|#919191}}
-scrh_bg = {{Cl|_COPYIMAGE}}(scr_bg, 33)
+scrh_bg = {{Cl|_COPYIMAGE}}(scr_bg, {{Text|33|#F580B1}})
-{{Cl|_FREEIMAGE}} scr_bg 'we no longer need the software version in memory
+{{Cl|_FREEIMAGE}} scr_bg {{Text|<nowiki>'we no longer need the software version in memory</nowiki>|#919191}}
-'then do the same thing for the foreground
+{{Text|<nowiki>'then do the same thing for the foreground</nowiki>|#919191}}
 {{Cl|_DEST}} scr_fg
-{{Cl|LINE}} (0, 0)-(50, 50), {{Cl|_RGBA32}}(255, 255, 255, 200), BF
+{{Cl|LINE}} ({{Text|0|#F580B1}}, {{Text|0|#F580B1}})-({{Text|50|#F580B1}}, {{Text|50|#F580B1}}), {{Cl|_RGBA32}}({{Text|255|#F580B1}}, {{Text|255|#F580B1}}, {{Text|255|#F580B1}}, {{Text|200|#F580B1}}), BF
-'copy to hardware screen
+{{Text|<nowiki>'copy to hardware screen</nowiki>|#919191}}
-scrh_fg = {{Cl|_COPYIMAGE}}(scr_fg, 33)
+scrh_fg = {{Cl|_COPYIMAGE}}(scr_fg, {{Text|33|#F580B1}})
-{{Cl|_FREEIMAGE}} scr_fg 'and free software screen from memory
+{{Cl|_FREEIMAGE}} scr_fg {{Text|<nowiki>'and free software screen from memory</nowiki>|#919191}}
-'set image destination to main screen
+{{Text|<nowiki>'set image destination to main screen</nowiki>|#919191}}
-{{Cl|_DEST}} 0
+{{Cl|_DEST}} {{Text|0|#F580B1}}
-{{Cl|_DISPLAYORDER}} _HARDWARE 'do not even render the software layer, just the hardware one.
+{{Cl|_DISPLAYORDER}} {{Cl|_HARDWARE}} {{Text|<nowiki>'do not even render the software layer, just the hardware one.</nowiki>|#919191}}
-{{Cl|DO...LOOP|DO}} 'main program loop
+{{Cl|DO}} {{Text|<nowiki>'main program loop</nowiki>|#919191}}
-     '_putimage knows these are hardware screens, so destination of 0 is taken as hardware layer
+     {{Text|<nowiki>'_putimage knows these are hardware screens, so destination of 0 is taken as hardware layer</nowiki>|#919191}}
      {{Cl|_PUTIMAGE}} , scrh_bg
      {{Cl|_PUTIMAGE}} (x, y), scrh_fg
-     'just some input processing
+     {{Text|<nowiki>'just some input processing</nowiki>|#919191}}
      k = {{Cl|_KEYHIT}}
      {{Cl|SELECT CASE}} k
-         {{Cl|CASE}} {{Cl|ASC}}("w"): y = y - 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"w"</nowiki>|#FFB100}}): y = y - {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("a"): x = x - 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"a"</nowiki>|#FFB100}}): x = x - {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("s"): y = y + 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"s"</nowiki>|#FFB100}}): y = y + {{Text|1|#F580B1}}
-         {{Cl|CASE}} {{Cl|ASC}}("d"): x = x + 1
+         {{Cl|CASE}} {{Cl|ASC (function)|ASC}}({{Text|<nowiki>"d"</nowiki>|#FFB100}}): x = x + {{Text|1|#F580B1}}
      {{Cl|END SELECT}}
-     {{Cl|_DISPLAY}} 'render image after changes
+     {{Cl|_DISPLAY}} {{Text|<nowiki>'render image after changes</nowiki>|#919191}}
-     {{Cl|_LIMIT}} 30 'we're doing all this at 30 cycles/second
+     {{Cl|_LIMIT}} {{Text|30|#F580B1}} {{Text|<nowiki>'we're doing all this at 30 cycles/second</nowiki>|#919191}}
-LOOP
+{{Cl|LOOP}}
 {{CodeEnd}}
+{{Small|Example by Johny B.}}
-''See also:''
+{{PageSeeAlso}}
-* [[_LOADIMAGE]], [[_COPYIMAGE]]
+* [[_LOADIMAGE]], [[_COPYIMAGE]], [[_SAVEIMAGE]]
 * [[_PUTIMAGE]], [[_MAPTRIANGLE]]
 * [[_DISPLAYORDER]]
 * [[_FREEIMAGE]]
-{{PageNavigation}}
+{{PageReferences}}

Hardware images: Difference between revisions

Latest revision as of 13:16, 19 November 2024

See also

QB64 Programming References

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