Fix compilation errors with old SDL versions

SDL_PixelFormatEnum has been introduced in SDL 2.0.10:
<cc6a8ac87e>

SDL_PIXELFORMAT_BGR444 has been introduced in SDL 2.0.12:
<a1c11854f2>

Fixes #2777 <https://github.com/Genymobile/scrcpy/issues/2777>

BUILD.md

@@ -270,10 +270,10 @@ install` must be run as root)._
 
 #### Option 2: Use prebuilt server
 
- - [`scrcpy-server-v1.19`][direct-scrcpy-server]  
-   _(SHA-256: 876f9322182e6aac6a58db1334f4225855ef3a17eaebc80aab6601d9d1ecb867)_
+ - [`scrcpy-server-v1.20`][direct-scrcpy-server]  
+   _(SHA-256: b20aee4951f99b060c4a44000ba94de973f9604758ef62beb253b371aad3df34)_
 
-[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.19/scrcpy-server-v1.19
+[direct-scrcpy-server]: https://github.com/Genymobile/scrcpy/releases/download/v1.20/scrcpy-server-v1.20
 
 Download the prebuilt server somewhere, and specify its path during the Meson
 configuration:

README.md

@@ -1,4 +1,4 @@
-# scrcpy (v1.19)
+# scrcpy (v1.20)
 
 <img src="data/icon.svg" width="128" height="128" alt="scrcpy" align="right" />
 
@@ -101,10 +101,10 @@ process][BUILD_simple]).
 For Windows, for simplicity, a prebuilt archive with all the dependencies
 (including `adb`) is available:
 
- - [`scrcpy-win64-v1.19.zip`][direct-win64]  
-   _(SHA-256: 383d6483f25ac0092d4bb9fef6c967351ecd50fc248e0c82932db97d6d32f11b)_
+ - [`scrcpy-win64-v1.20.zip`][direct-win64]  
+   _(SHA-256: 548532b616288bcaeceff6881ad5e6f0928e5ae2b48c380385f03627401cfdba)_
 
-[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.19/scrcpy-win64-v1.19.zip
+[direct-win64]: https://github.com/Genymobile/scrcpy/releases/download/v1.20/scrcpy-win64-v1.20.zip
 
 It is also available in [Chocolatey]:
 

app/src/icon.c

@@ -158,6 +158,12 @@ free_ctx:
     return result;
 }
 
+#if !SDL_VERSION_ATLEAST(2, 0, 10)
+// SDL_PixelFormatEnum has been introduced in SDL 2.0.10. Use int for older SDL
+// versions.
+typedef int SDL_PixelFormatEnum;
+#endif
+
 static SDL_PixelFormatEnum
 to_sdl_pixel_format(enum AVPixelFormat fmt) {
     switch (fmt) {
@@ -172,7 +178,9 @@ to_sdl_pixel_format(enum AVPixelFormat fmt) {
         case AV_PIX_FMT_BGR565BE: return SDL_PIXELFORMAT_BGR565;
         case AV_PIX_FMT_BGR555BE: return SDL_PIXELFORMAT_BGR555;
         case AV_PIX_FMT_RGB444BE: return SDL_PIXELFORMAT_RGB444;
+#if SDL_VERSION_ATLEAST(2, 0, 12)
         case AV_PIX_FMT_BGR444BE: return SDL_PIXELFORMAT_BGR444;
+#endif
         case AV_PIX_FMT_PAL8: return SDL_PIXELFORMAT_INDEX8;
         default: return SDL_PIXELFORMAT_UNKNOWN;
     }

install_release.sh

@@ -2,8 +2,8 @@
 set -e
 
 BUILDDIR=build-auto
-PREBUILT_SERVER_URL=https://github.com/Genymobile/scrcpy/releases/download/v1.19/scrcpy-server-v1.19
-PREBUILT_SERVER_SHA256=876f9322182e6aac6a58db1334f4225855ef3a17eaebc80aab6601d9d1ecb867
+PREBUILT_SERVER_URL=https://github.com/Genymobile/scrcpy/releases/download/v1.20/scrcpy-server-v1.20
+PREBUILT_SERVER_SHA256=b20aee4951f99b060c4a44000ba94de973f9604758ef62beb253b371aad3df34
 
 echo "[scrcpy] Downloading prebuilt server..."
 wget "$PREBUILT_SERVER_URL" -O scrcpy-server