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code_glitch

Some graphic benchmarking

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So I was thinking, after going to all this trouble of making OpenGl work with Sdl in an easy interface - how much slower would it be than plain old sdl?

So I came up with two small little programs to test this out. Prometheus_Vid would go up against sdl_image and sdl. The challenge was simple: how many pixels of a png can each contestant blit in 1 second. The destination would be a 640x480 windows in 32 bit colour mode. No flags for sdl, no special performance modes for Prometheus. Simple. Because the results were outstanding to say the least, I will start with them:

Code:
426440000 prometheus pixels
023960000 sdl pixels
881200000 prometheus pixels
023960000 sdl pixels
475200000 prometheus pixels
023720000 sdl pixels

prometheus average 
= 594280000 pixels

sdl average
= 023880000 pixels
So there you have it - the results. I did not flip the end result to save 1 line of code (its sunday - be lazy, but I think Prometheus would still be on top somewhow . My first impression after running each one once was one very surprised look - I mean 20x faster than SDL whhaaaat? so I ran it twice more: consistent results for sdl, for prometheus, it sort of depended on how much I moved the mouse (not sure why but there).

Also, I will thus supply the code for the benchmark programs:

Sdl Benchmark:
Code:
program SdlBenchmark;

uses
    sdl,
    sdl_image,
    png;

var
    Data: pSdl_Surface;
    StartTime: Int64;
    Draws: Int64;
    Screen: pSdl_Surface;

begin
    Sdl_Init(Sdl_Init_Everything);
    
    Screen := sdl_SetVideoMode(640, 480, 32, 0);
    
    Data := Img_Load('Img.png');
    
    StartTime := sdl_GetTicks;
    
    Draws := 0;
    
    repeat
        sdl_blitsurface(Data, nil, Screen, nil);
        Draws := Draws + 1;
        until (sdl_GetTicks - StartTime) > 1000;
    writeln('DREW [',DRAWS,'] X [',Data^.w,'X',Data^.h,'] = [',Data^.w * Data^.h,']');
    writeln('TOTAL [',Data^.w * Data^.h * Draws,'] PX');
end.
prometheus benchmark program:
Code:
program PrometheusBenchmark;

uses
    Prometheus_Vid,
    sdl;

var
    Data: Image;
    StartTime: Int64;
    Draws: Int64;

begin
    PrometheusVid_Start();
    CreateWindow(640, 480, 32);
    
    Data.Load('Img.png');
    
    StartTime := sdl_GetTicks;
    
    Draws := 0;
    
    repeat
        Data.Draw(0,0);
        Draws := Draws + 1;
        until (sdl_GetTicks - StartTime) > 1000;
    writeln('DREW [',DRAWS,'] X [',Data.GlWidth,'X',Data.GlHeight,'] = [',Data.GlWidth * Data.GlHeight,']');
    writeln('TOTAL [',Data.GlWidth * Data.GlHeight * Draws,'] PX');
end.
Conclusion: THIS IS SPARTAAAAA
for record, the prometheus version used is r27/28 (cannot be sure since kdesvn says its out of date why, I don't know but there. I expect both would perform the same since the drawing code is equal )

code_glitch
over and out in a blit

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Updated 16-01-2011 at 04:37 PM by code_glitch

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