-Eye Candy +Providing direct memory access to SDL_Surface's pixels
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-clang
-With each imperfect hit
-a legendary blade forms
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-In prep for the TPM meeting we have been working hard to release a new version of SDL Perl and Alien::SDL. After a lot of feed back from testers (Mike Stok, Stuart Watt, and Chas Owens), we where able to get a working version on 64bit and Mac. The releases will be out tomorrow but here
-is some eye candy to tide you guys over.
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-This is shooter.pl finally working in MacOSX and 64 bit.
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-k23z_ mentioned I should get some more SDL_perl videos out to attract some devs. So here goes.
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-Walking Guy from SDLPerl on Vimeo.
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-clang
-With each imperfect hit
-a legendary blade forms
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In an attempt to make pixel access easier on SDL_Surface pixels. I have started work on SDLx::Surface. So far I have only start on the 32 bpp surfaces.
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The general idea is to make Pointer Values (PV) of each pixel in the surface and place them into a 2D matrix. First I make pointer values like this:
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SV * get_pixel32 (SDL_Surface *surface, int x, int y) +{ + //Convert the pixels to 32 bit + Uint32 *pixels = (Uint32 *)surface->pixels; + + //Get the requested pixel + Uint32* u_ptr = pixels + ( y * surface->w ) + x ; + + SV* sv = newSVpv("a",1); //Make a temp SV* value on the go + SvCUR_set(sv, sizeof(Uint32)); //Specify the new CUR length + SvLEN_set(sv, sizeof(Uint32)); //Specify the LEN length + SvPV_set(sv,(char*)u_ptr); // set the actual pixel's pointer as the memory space to use + + return sv; //make a modifiable reference using u_ptr's place as the memory :) + +} +
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Next I loop through all the pixels and put them in a 2D array format, shown below:
AV * construct_p_matrix ( SDL_Surface *surface ) +{ + AV * matrix = newAV(); + int i, j; + for( i =0 ; i < surface->w; i++) + { + AV * matrix_row = newAV(); + for( j =0 ; j < surface->h; j++) + { + av_push(matrix_row, get_pixel32(surface, i,j) ); + } + av_push(matrix, newRV_noinc((SV*) matrix_row) ); + } + + return matrix; +} +
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You can see the complete here.
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In Perl I can do a get access on this pixel using:
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-In prep for the TPM meeting we have been working hard to release a new version of SDL Perl and Alien::SDL. After a lot of feed back from testers (Mike Stok, Stuart Watt, and Chas Owens), we where able to get a working version on 64bit and Mac. The releases will be out tomorrow but here
-is some eye candy to tide you guys over.
-
-
-This is shooter.pl finally working in MacOSX and 64 bit.
-
-
-
-k23z_ mentioned I should get some more SDL_perl videos out to attract some devs. So here goes.
-
-Walking Guy from SDLPerl on Vimeo.
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