fixes for light2d in androids that do not support

read depth

drivers/gles2/rasterizer_gles2.cpp

@@ -9129,6 +9129,7 @@ void RasterizerGLES2::canvas_render_items(CanvasItem *p_item_list,int p_z,const
 	canvas_shader.set_conditional(CanvasShaderGLES2::USE_MODULATE,canvas_use_modulate);
 	canvas_shader.set_conditional(CanvasShaderGLES2::USE_DISTANCE_FIELD,false);
 
+
 	bool reset_modulate=false;
 	bool prev_distance_field=false;
 
@@ -10578,6 +10579,7 @@ void RasterizerGLES2::init() {
 	shadow_mat_ptr = material_owner.get(shadow_material);
 	overdraw_material = create_overdraw_debug_material();
 	copy_shader.set_conditional(CopyShaderGLES2::USE_8BIT_HDR,!use_fp16_fb);
+	canvas_shader.set_conditional(CanvasShaderGLES2::USE_DEPTH_SHADOWS,read_depth_supported);
 
 	canvas_shader.set_conditional(CanvasShaderGLES2::USE_PIXEL_SNAP,GLOBAL_DEF("rasterizer/use_pixel_snap",false));
 

drivers/gles2/shaders/canvas.glsl

@@ -299,32 +299,45 @@ LIGHT_SHADER_CODE
 
 		highp float shadow_attenuation;
 
+#ifdef USE_DEPTH_SHADOWS
+
+#define SHADOW_DEPTH(m_tex,m_uv) (texture2D((m_tex),(m_uv)).z)
+
+#else
+
+//#define SHADOW_DEPTH(m_tex,m_uv) dot(texture2D((m_tex),(m_uv)),highp vec4(1.0 / (256.0 * 256.0 * 256.0),1.0 / (256.0 * 256.0),1.0 / 256.0,1)  )
+#define SHADOW_DEPTH(m_tex,m_uv) dot(texture2D((m_tex),(m_uv)),vec4(1.0 / (256.0 * 256.0 * 256.0),1.0 / (256.0 * 256.0),1.0 / 256.0,1)  )
+
+#endif
+
+
+
 #ifdef SHADOW_PCF5
 
 		shadow_attenuation=0.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*2.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*2.0,sh)).z<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*2.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*2.0,sh))<sz?0.0:1.0;
 		shadow_attenuation/=5.0;
 
 #endif
 
 #ifdef SHADOW_PCF13
 
-		shadow_attenuation += texture2D(shadow_texture,vec2(su,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*2.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*3.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*4.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*5.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su+shadowpixel_size*6.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*2.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*3.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*4.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*5.0,sh)).z<sz?0.0:1.0;
-		shadow_attenuation += texture2D(shadow_texture,vec2(su-shadowpixel_size*6.0,sh)).z<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*2.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*3.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*4.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*5.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size*6.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*2.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*3.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*4.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*5.0,sh))<sz?0.0:1.0;
+		shadow_attenuation += SHADOW_DEPTH(shadow_texture,vec2(su-shadowpixel_size*6.0,sh))<sz?0.0:1.0;
 		shadow_attenuation/=13.0;
 
 #endif
@@ -336,8 +349,8 @@ LIGHT_SHADER_CODE
 			float unnormalized = su/shadowpixel_size;
 			float fractional = fract(unnormalized);
 			unnormalized = floor(unnormalized);
-			float zc = texture2D(shadow_texture,vec2((unnormalized-0.5)*shadowpixel_size,sh)).z;
-			float zn = texture2D(shadow_texture,vec2((unnormalized+0.5)*shadowpixel_size,sh)).z;
+			float zc = SHADOW_DEPTH(shadow_texture,vec2((unnormalized-0.5)*shadowpixel_size,sh));
+			float zn = SHADOW_DEPTH(shadow_texture,vec2((unnormalized+0.5)*shadowpixel_size,sh));
 			float z = mix(zc,zn,fractional);
 			shadow_attenuation=clamp(exp(shadow_esm_multiplier* ( z - sz )),0.0,1.0);
 	}
@@ -346,7 +359,7 @@ LIGHT_SHADER_CODE
 
 #if !defined(SHADOW_PCF5) && !defined(SHADOW_PCF13) && !defined(SHADOW_ESM)
 
-		shadow_attenuation = texture2D(shadow_texture,vec2(su+shadowpixel_size,sh)).z<sz?0.0:1.0;
+		shadow_attenuation = SHADOW_DEPTH(shadow_texture,vec2(su+shadowpixel_size,sh))<sz?0.0:1.0;
 
 #endif
 

platform/android/detect.py

@@ -24,7 +24,7 @@ def get_opts():
              ('NDK_TOOLCHAIN', 'toolchain to use for the NDK',"arm-eabi-4.4.0"), 	                      
              #android 2.3       
 		 ('ndk_platform', 'compile for platform: (2.2,2.3)',"2.2"),
-		 ('NDK_TARGET', 'toolchain to use for the NDK',"arm-linux-androideabi-4.8"),
+		 ('NDK_TARGET', 'toolchain to use for the NDK',"arm-linux-androideabi-4.9"),
 		('android_stl','enable STL support in android port (for modules)','no'),
 		('armv6','compile for older phones running arm v6 (instead of v7+neon+smp)','no'),
 		 ('x86','Xompile for Android-x86','no')
@@ -91,7 +91,7 @@ def configure(env):
 		gcc_path=gcc_path+"/darwin-x86_64/bin" #this may be wrong
 		env['SHLINKFLAGS'][1] = '-shared'
 	elif (os.name=="nt"):
-		gcc_path=gcc_path+"/windows/bin" #this may be wrong
+		gcc_path=gcc_path+"/windows-x86_64/bin" #this may be wrong