Detect Android driver to disable x11 direcft_copy of buffers (for #504)

Author: ptitSeb

src/glx/glx.c

@@ -2822,13 +2822,17 @@ void BlitEmulatedPixmap(int win) {
     }
     static int direct_copy = 1;
     if(direct_copy) {
-        LOAD_EGL(eglCopyBuffers);
-        if(!egl_eglCopyBuffers(eglDisplay, buff->Surface, (EGLNativePixmapType)frame)) {
-            LOGE("Cannot use eglCopyBuffers, disabling it's use: ");
-            CheckEGLErrors();
+        if(hardext.android)
             direct_copy = 0;
-        } else
-            return;
+        else {
+            LOAD_EGL(eglCopyBuffers);
+            if(!egl_eglCopyBuffers(eglDisplay, buff->Surface, (EGLNativePixmapType)frame)) {
+                LOGE("Cannot use eglCopyBuffers, disabling it's use: ");
+                CheckEGLErrors();
+                direct_copy = 0;
+            } else
+                return;
+        }
     }
     uintptr_t pix=(uintptr_t)frame->data;
 

src/glx/hardext.c

@@ -213,13 +213,18 @@ void GetHardwareExtensions(int notest)
     }
 
     egl_eglChooseConfig(eglDisplay, configAttribs, pbufConfigs, 1, &configsFound);
+    const char* eglExts = egl_eglQueryString(eglDisplay, EGL_EXTENSIONS);
 #ifndef NO_GBM
-    const char* eglExts = egl_eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
     if(eglExts && strstr(eglExts, "EGL_KHR_platform_gbm ")) {
         SHUT_LOGD("GBM Surfaces supported%s\n", globals4es.usegbm?" and used":"");
         hardext.gbm = 1;
     }
 #endif
+    //SHUT_LOGD("EGL extension: %s\n", eglExts);
+    if(eglExts && strstr(eglExts, "EGL_ANDROID_image_native_buffer ")) {
+        hardext.android = 1;
+        SHUT_LOGD("Android driver detected, disabling X11 direct_copy for PBuffer\n");
+    }
 #ifndef PANDORA
     if(!configsFound) {
         // try without alpha channel

src/glx/hardext.h

@@ -47,6 +47,7 @@ typedef struct _hardext {
     int srgb;           // EGL_KHR_gl_colorspace
     int mapbuffer;      // GL_OES_mapbuffer
     int drawbuffers;    // GL_EXT_draw_buffers
+    int android;        // Android driver detected (so X11 CopyBuffer cannot be used)
     // es2 stuffs
     int esversion;      // 1 is ES1.1 backend, 2 is ES2
     int maxvattrib;     // GL_MAX_VERTEX_ATTRIBS (or 0 if not using es2)