Cairo, SDL compilation and running on iOS platform

I wrote blobsalad code from the Internet (click to open the link), which is interesting. I want to transplant it to the iOS platform.

The program requires Cairo and SDL. First, compile their iOS platform library.

SDL 1.3 supports IOS compilation.

Compile Cairo:

Cairo depends on libpng and pixman again to download the source code of these two libraries.

Simulator compilation and installation libpng pixman

. /Configure cc = "/developer/platforms/iphonesimulator. platform/developer/usr/bin/GCC-STD = c99-arch i386-isysroot/developer/platforms/iphonesimulator. platform/developer/sdks/iphonesimulator5.0.sdk/"Ar ="/developer/platforms/iphonesimulator. platform/developer/usr/bin/AR"

Everything went well, but it was not suitable for Cairo compilation. So, after trying again and turning off n multiple features, the compilation was successful:

. /Configure cc = "/developer/platforms/iphonesimulator. platform/developer/usr/bin/GCC-STD = gnu99-arch i386-isysroot/developer/platforms/iphonesimulator. platform/developer/sdks/iphonesimulator5.0.sdk/-miphoneos-version-min = 5.0 "Ar ="/developer/platforms/iphonesimulator. platform/developer/usr/bin/AR"
-- Enable-xlib = No -- enable-xlib-xrender = No -- enable-FT = No -- enable-script = No -- enable-PS = No -- enable-PDF = No -- enable -SVG = No -- enable-trace = No -- enable-interpreter = No -- enable-PNG = No

Real machine Compilation:

Armv6:

. /Configure -- Host = arm-apple-darwin10 cc = "/developer/platforms/iphoneos. platform/developer/usr/bin/GCC-STD = gnu99-arch armv6-isysroot/developer/platforms/iphoneos. platform/developer/sdks/iphoneos4.2.sdk"

. /Configure -- Host = arm-apple-darwin10 cc = "/developer/platforms/iphoneos. platform/developer/usr/bin/GCC-STD = gnu99-arch armv6-isysroot/developer/platforms/iphoneos. platform/developer/sdks/iphoneos4.2.sdk/"-- enable-xlib = No -- enable-xlib-xrender = No
-- Enable-FT = No -- enable-script = No -- enable-PS = No -- enable-PDF = No -- enable-SVG = No -- enable-trace = No -- enable-Interpreter = No -- enable-PNG = No

Armv7:

. /Configure -- Host = arm-apple-darwin10 cc = "/developer/platforms/iphoneos. platform/developer/usr/bin/GCC-STD = gnu99-arch armv7-isysroot/developer/platforms/iphoneos. platform/developer/sdks/iphoneos4.2.sdk"

. /Configure -- Host = arm-apple-darwin10 cc = "/developer/platforms/iphoneos. platform/developer/usr/bin/GCC-STD = gnu99-arch armv7-isysroot/developer/platforms/iphoneos. platform/developer/sdks/iphoneos4.2.sdk/"-- enable-xlib = No -- enable-xlib-xrender = No
-- Enable-FT = No -- enable-script = No -- enable-PS = No -- enable-PDF = No -- enable-SVG = No -- enable-trace = No -- enable-Interpreter = No -- enable-PNG = No

Create an iOS project.

Drag the compiled Cairo. A, SDL. A, and pixman. A to the project.

Add several frameworks: audiotoolbox, audiocore, quartzcore, and opengles.

An error occurred while compiling the code for the first time.

The reason is that SDL 1.2 is used for blob, and some APIs are modified on 1.3.

I have learned how to use it. I have made some changes based on the API name and can run it. However, the method may not be standard. please correct me.

1.3 does not support direct surface painting, but uses Windows and render control.

No direct connection was found between surface and render, so texture was used.

1. In bs_cairo.c, create a screen and modify it:

    SDL_Window *window = SDL_CreateWindow(NULL, 0, 0, width, height,                     SDL_WINDOW_SHOWN);        pCairoSdl->pRender = SDL_CreateRenderer(window, -1, 0);        if (pCairoSdl->pRender == NULL) {        fprintf(stderr, "SDL_CreateSoftwareRenderer failed: %s\n", SDL_GetError());         exit(1);     }        pCairoSdl->pScreen = SDL_CreateRGBSurface (SDL_SWSURFACE,  width,  height, 32, 0,0,0,0);      if(pCairoSdl->pScreen == NULL)  {    fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());     exit(1);   }        pCairoSdl->pTexture = SDL_CreateTextureFromSurface(pCairoSdl->pRender, pCairoSdl->pScreen);    if(pCairoSdl->pTexture == NULL)    {        fprintf(stderr, "SDL_CreateTextureFromSurface failed: %s\n", SDL_GetError());         exit(1);     }

2. bs_main:

    SDL_DestroyTexture(pMainData->pCairoSdl->pTexture);    pMainData->pCairoSdl->pTexture = SDL_CreateTextureFromSurface( pMainData->pCairoSdl->pRender, pMainData->pCairoSdl->pScreen);        SDL_RenderCopy(pMainData->pCairoSdl->pRender, pMainData->pCairoSdl->pTexture, &srcRect, &dstRect);            SDL_RenderPresent(pMainData->pCairoSdl->pRender);

Success: