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If you want a speed increase, use 16 bit mode as your graphics mode. You have to convert all surfaces to 16 bit mode as well to realize a speed beneift. Also, when converting you need to make sure you convert the surfaces to Software surfaces. By default it will convert them to HARDWARE surafces (at...

1) Ridiculous to charge for Homebrew, I have said this all along. 2) I'm sure they referenced this site for info, as most serious devs have. I don't think they are using the name to try and increase sales, but rather to make it seem like the money "donated" to this project goes to develope...

I don't take credit for this, and I forgot the name of the guy who wrote it. If you do a search, you will find the origional post containing this code. This bad boy works like a charm, and has helped me out something fierce. Garak float GetFreeRam() { float ram = 0; int i = 0; int ramAdd[320]; for(i...

Hello,

I believe sceGuCopyImage() can only be used to copy the RGB data of an image to VRAM. It will not allow you to use any type of alpha blending or transperancy features.

Garak

Hi, What do you mean by "the surfaces were created in the constructor"? I am just curious, as I thought TTF_Reneder was the only wat to create TTF SDL_Surfaces. Go to the SDL docs and look at the def for SDL_ConvertSurface. that is the function one uses to convert from 32 to 16 bit surface...

I'm a little confused on the TTF problems you were having with SDL... In SDL, you use ttf_render to create your text string and it returns an SDL surface to you. Once you have that surrface, you can reuse it as many times as you want. There is no need to re-create that surface again and again each t...

Thanks, Would this need to be done each time the image is drawn, or just once after copying the image? I am not drawing the images to the screen, SDL is doing that. I imagine SDL is using memcpy to move the data from the SDL Image to the screen buffer. Would you really need to call sceKernelDcacheWr...

Greetings, I am using SDL to make a game. I have implemented some code to allow me to load an image into VRAM. When I place the image in VRAM, it comes well after my screen buffers. I noticed that for some reason, one of my images does not seem to copy in the last row of pixels when being transfered...

Results such as those described in your post often occur when you flip your buffers without waiting for the vblank to occur.

If you are not allready, try calling sceDisplayWaitVblankStart() before doing a buffer swap.

Garak

If you want a world of speed increase in SDL, make sure to convert your screen mode from 32 to 16 bit. It will be the difference between night and day.

Garak

srand(time(NULL)),

Yea that's hot... that's hot. I'll be sure to update my code and use it. Thanks.

Garak

Hi, There is probably a better solution than this, but alas this is the solution I used and it did/does work. I created the following function: void InitRandomNumberGen() { int x; struct timeval cTime; gettimeofday(&cTime, 0); int seed = cTime.tv_sec % 256; for (x=0; x < seed; x++) rand(); } Cal...

I just like how this guy claims he managed to get code to run on a 2.0 PSP using this number. It's one thing to be confused and not know what your're talking about, but to claim you actually used this number to sign code? I mean what was that all about?

Garak

That function to convert a string to an integer is not correct. It should be as follows: // implementation: int parseInt(const char *str, bool *success) { const char *s = str; int r = 0; while (*s) { char c = *s; if ((c < '0') || (c > '9')) { *success = false; return 0; } r = r * 10 + (c - '0'); s++...

Hello, Actually, Your second approach should work just fine. unsigned char *loadPNGfromfile(const char *filename, int &widp, int &heip, int swizzleit) {widp = 10;heip=10;} /*called like:*/ charstr = loadPNGfromfile("dir",width, height, 0); // added 0 as last param You are just pass...

As said above, the malloc ideo should work, but it won't be the prettiest. If your malloc fails, it will return 0, then you know you are out of memory. But... beware. I am wondering if it would be a problem if you allocated a chunk of memory that was too big (like a 10 meg chunk). Maybe the system s...

What you have looks good to me... If you use a hardware surface, and its is a very small surface (less thena 64x64 or so pixels), then this problem may occur. I am not sure if this has been repaired in the latest SDL release or not. To temporarily fix the problem, I converted all of my surfaces to s...

Hello, In C, when you rem out sections of code, the compiler will often organize variables in memory a little differently. Most likely, your bug is somehwre else in your code. As you sated, a pointer is probably pointing to something it ought not be, or maybe a thread you have created has overrun it...

Hello, I recently tried to use SDL mixer in my SDL app, and I am getting an error. I installed the latest version from the SVN, built and installed it. I am using cygwin and the bash shell to install. When installing, I received the following error: checking for C compiler default output file name.....

Hello again, Now that there is an official topic for it, I don't feel so bad asking for help. I have been working on a 2D side-scroller for several months now. The game is for the PSP and it is written in C using SDL. The 2D engine works great, and the game is currently playable. It has (in my opini...

Greetings, Small images do not seem to load correctly in SDL. When I load an image with a width of less then 35 pixels or so, the image gets drawn to the screen incorrectly, almost like the pixel data is off by a little bit. From what I an tell, the width and height both need to be a minimum of some...

Perhaps you could just change 15 bit graphics mode to be 4444 mode. It could be our little secret =). But seriously, I think it's crucial that SDL support hardware accelerated alpha blits. The psp port is already doing really well as far as speed is concerned, and this would push it over the top in ...

I decided to look into the SDL source before trying Tony’s suggestion. It appears that SDL only stores 16 bit image data in 5551 or 5650 pixels formats. The 4444 format does not seem to be a format that your native pixel data can exist in. As such, I don’t think it would do me any good to convert th...

Greetings, I have been attempting to use 32 bit PNG files with an alpha channel. I load the images via SDL_Image. I have my display setup in 16 bit mode. When I call SDL_DisplayFormatAlpha() on my image, my image becomes fully transparent. I.E. I can see right through it and it is as if it was never...

Thanks to rinco, all of the issues I mentiond have been resolved. I downloaded the latest SDL, and everything worked great. Very nice job on the speed increase when drawing graphics. Keep up the good work.

Garak

Greetings, I noticed a new SDL was added to the SVN, and I updated. I just installed the new SDL over my old copy. It appears that images draw to the screen MUCH faster, nice job. But there are several unfortunate side effects that I am noticing. 1. When my images are drawn to the screen, some image...

How would sceGuCopyImage allow hardware acceleration? Would it only allow accelerated blits for images that do not use alpha blending or a transparency color? I thought to utilize eaither of those features, you had to use the GU, or a port of openGL and the likes. Also, is there a hardware accelerat...

I have run into a wall using SDL for graphics development. Currently, I setup my video mode to use 16 bits per pixel, and double buffering. I convert all of my input images to the display format to speed things up. Using Hardware or software memory for my video mode does not seem to make a differenc...

I have been using double buffering. I have used double buffering with my buffer in VRAM and in system memory. In both cases, I have converted the background image to the screen's format (I am using 16 bit mode). Neither scenerio has worked. For that matter I have tried using single buffers, located ...