Expose VIEWPORT_SIZE in shader language.

Fixes #11710.

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -1132,9 +1132,9 @@ bool RasterizerSceneGLES3::_setup_material(RasterizerStorageGLES3::Material *p_m
 		state.current_depth_draw = p_material->shader->spatial.depth_draw_mode;
 	}
 
-//glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
+	//glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
 
-/*
+	/*
 	if (p_material->flags[VS::MATERIAL_FLAG_WIREFRAME])
 		glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
 	else
@@ -4011,6 +4011,8 @@ void RasterizerSceneGLES3::render_scene(const Transform &p_cam_transform, const
 	state.ubo_data.shadow_dual_paraboloid_render_side = 0;
 	state.ubo_data.shadow_dual_paraboloid_render_zfar = 0;
 
+	p_cam_projection.get_viewport_size(state.ubo_data.viewport_size[0], state.ubo_data.viewport_size[1]);
+
 	if (storage->frame.current_rt) {
 		state.ubo_data.screen_pixel_size[0] = 1.0 / storage->frame.current_rt->width;
 		state.ubo_data.screen_pixel_size[1] = 1.0 / storage->frame.current_rt->height;

drivers/gles3/rasterizer_scene_gles3.h

@@ -124,6 +124,7 @@ public:
 			float z_slope_scale;
 			float shadow_dual_paraboloid_render_zfar;
 			float shadow_dual_paraboloid_render_side;
+			float viewport_size[2];
 			float screen_pixel_size[2];
 			float shadow_atlas_pixel_size[2];
 			float shadow_directional_pixel_size[2];
@@ -143,7 +144,7 @@ public:
 			float fog_height_min;
 			float fog_height_max;
 			float fog_height_curve;
-			uint8_t padding[8];
+			// make sure this struct is padded to be a multiple of 16 bytes for webgl
 
 		} ubo_data;
 

drivers/gles3/shader_compiler_gles3.cpp

@@ -766,7 +766,7 @@ ShaderCompilerGLES3::ShaderCompilerGLES3() {
 	//builtins
 
 	actions[VS::SHADER_SPATIAL].renames["TIME"] = "time";
-	//actions[VS::SHADER_SPATIAL].renames["VIEWPORT_SIZE"]=ShaderLanguage::TYPE_VEC2;
+	actions[VS::SHADER_SPATIAL].renames["VIEWPORT_SIZE"] = "viewport_size";
 
 	actions[VS::SHADER_SPATIAL].renames["FRAGCOORD"] = "gl_FragCoord";
 	actions[VS::SHADER_SPATIAL].renames["FRONT_FACING"] = "gl_FrotFacing";

drivers/gles3/shaders/scene.glsl

@@ -80,6 +80,7 @@ layout(std140) uniform SceneData { //ubo:0
 	highp float shadow_dual_paraboloid_render_zfar;
 	highp float shadow_dual_paraboloid_render_side;
 
+	highp vec2 viewport_size;
 	highp vec2 screen_pixel_size;
 	highp vec2 shadow_atlas_pixel_size;
 	highp vec2 directional_shadow_pixel_size;
@@ -566,6 +567,7 @@ in vec3 normal_interp;
 uniform bool no_ambient_light;
 
 
+
 #ifdef USE_RADIANCE_MAP