Cleanup old references to GLES2 renderer

There are still some left in the Android Java code, even stuff to swap between
GLES1 and GLES2 support from early Godot days... would be good to see some cleanup
there too one day.

The "graphics/api" option for Android exports is removed, as only GLES 3.0 is supported.
It can be readded when GLES 2.0 support comes back. Fixes #13004.

3 files changed, 2 insertions, 64 deletions

diff --git a/drivers/gl_context/context_gl.cpp b/drivers/gl_context/context_gl.cpp
index a453eef227..1581512369 100644
--- a/drivers/gl_context/context_gl.cpp
+++ b/drivers/gl_context/context_gl.cpp
@@ -29,7 +29,7 @@
 /*************************************************************************/
 #include "context_gl.h"
 
-#if defined(OPENGL_ENABLED) || defined(GLES2_ENABLED)
+#if defined(OPENGL_ENABLED) || defined(GLES_ENABLED)
 
 ContextGL *ContextGL::singleton = NULL;
 
diff --git a/drivers/gl_context/context_gl.h b/drivers/gl_context/context_gl.h
index 399657eb52..3496f2948c 100644
--- a/drivers/gl_context/context_gl.h
+++ b/drivers/gl_context/context_gl.h
@@ -30,7 +30,7 @@
 #ifndef CONTEXT_GL_H
 #define CONTEXT_GL_H
 
-#if defined(OPENGL_ENABLED) || defined(GLES2_ENABLED)
+#if defined(OPENGL_ENABLED) || defined(GLES_ENABLED)
 
 #include "typedefs.h"
 
diff --git a/drivers/gles3/rasterizer_canvas_gles3.cpp b/drivers/gles3/rasterizer_canvas_gles3.cpp
index 42a253bc2d..308a18aa9d 100644
--- a/drivers/gles3/rasterizer_canvas_gles3.cpp
+++ b/drivers/gles3/rasterizer_canvas_gles3.cpp
@@ -149,13 +149,6 @@ void RasterizerCanvasGLES3::canvas_begin() {
 		storage->frame.clear_request = false;
 	}
 
-	/*canvas_shader.unbind();
-	canvas_shader.set_custom_shader(0);
-	canvas_shader.set_conditional(CanvasShaderGLES2::USE_MODULATE,false);
-	canvas_shader.bind();
-	canvas_shader.set_uniform(CanvasShaderGLES2::TEXTURE, 0);
-	canvas_use_modulate=false;*/
-
 	reset_canvas();
 
 	state.canvas_shader.set_conditional(CanvasShaderGLES3::USE_TEXTURE_RECT, true);
@@ -911,61 +904,6 @@ void RasterizerCanvasGLES3::_canvas_item_render_commands(Item *p_item, Item *cur
 	}
 }
 
-#if 0
-void RasterizerGLES2::_canvas_item_setup_shader_params(ShaderMaterial *material,Shader* shader) {
-
-	if (canvas_shader.bind())
-		rebind_texpixel_size=true;
-
-	if (material->shader_version!=shader->version) {
-		//todo optimize uniforms
-		material->shader_version=shader->version;
-	}
-
-	if (shader->has_texscreen && framebuffer.active) {
-
-		int x = viewport.x;
-		int y = window_size.height-(viewport.height+viewport.y);
-
-		canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_SCREEN_MULT,Vector2(float(viewport.width)/framebuffer.width,float(viewport.height)/framebuffer.height));
-		canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_SCREEN_CLAMP,Color(float(x)/framebuffer.width,float(y)/framebuffer.height,float(x+viewport.width)/framebuffer.width,float(y+viewport.height)/framebuffer.height));
-		canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_TEX,max_texture_units-1);
-		glActiveTexture(GL_TEXTURE0+max_texture_units-1);
-		glBindTexture(GL_TEXTURE_2D,framebuffer.sample_color);
-		if (framebuffer.scale==1 && !canvas_texscreen_used) {
-#ifdef GLEW_ENABLED
-			if (current_rt) {
-				glReadBuffer(GL_COLOR_ATTACHMENT0);
-			} else {
-				glReadBuffer(GL_BACK);
-			}
-#endif
-			if (current_rt) {
-				glCopyTexSubImage2D(GL_TEXTURE_2D,0,viewport.x,viewport.y,viewport.x,viewport.y,viewport.width,viewport.height);
-				canvas_shader.set_uniform(CanvasShaderGLES2::TEXSCREEN_SCREEN_CLAMP,Color(float(x)/framebuffer.width,float(viewport.y)/framebuffer.height,float(x+viewport.width)/framebuffer.width,float(y+viewport.height)/framebuffer.height));
-				//window_size.height-(viewport.height+viewport.y)
-			} else {
-				glCopyTexSubImage2D(GL_TEXTURE_2D,0,x,y,x,y,viewport.width,viewport.height);
-			}
-
-			canvas_texscreen_used=true;
-		}
-
-		glActiveTexture(GL_TEXTURE0);
-
-	}
-
-	if (shader->has_screen_uv) {
-		canvas_shader.set_uniform(CanvasShaderGLES2::SCREEN_UV_MULT,Vector2(1.0/viewport.width,1.0/viewport.height));
-	}
-
-
-	uses_texpixel_size=shader->uses_texpixel_size;
-
-}
-
-#endif
-
 void RasterizerCanvasGLES3::_copy_texscreen(const Rect2 &p_rect) {
 
 	glDisable(GL_BLEND);