[Impeller] opt all vertex shader position/uvs into highp

impeller/entity/shaders/blending/advanced_blend.vert

@@ -12,12 +12,12 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 vertices;
-in vec2 dst_texture_coords;
-in vec2 src_texture_coords;
+in highp vec2 vertices;
+in highp vec2 dst_texture_coords;
+in highp vec2 src_texture_coords;
 
-out vec2 v_dst_texture_coords;
-out vec2 v_src_texture_coords;
+out highp vec2 v_dst_texture_coords;
+out highp vec2 v_src_texture_coords;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(vertices, 0.0, 1.0);

impeller/entity/shaders/blending/blend.vert

@@ -11,10 +11,10 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 vertices;
-in vec2 texture_coords;
+in highp vec2 vertices;
+in highp vec2 texture_coords;
 
-out vec2 v_texture_coords;
+out highp vec2 v_texture_coords;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(vertices, 0.0, 1.0);

impeller/entity/shaders/border_mask_blur.vert

@@ -11,7 +11,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 in highp vec2 texture_coords;
 
 out highp vec2 v_texture_coords;

impeller/entity/shaders/color_matrix_color_filter.vert

@@ -11,7 +11,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
 out highp vec2 v_texture_coords;
 

impeller/entity/shaders/gaussian_blur/gaussian_blur.vert

@@ -12,12 +12,12 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 vertices;
-in vec2 texture_coords;
-in vec2 src_texture_coords;
+in highp vec2 vertices;
+in highp vec2 texture_coords;
+in highp vec2 src_texture_coords;
 
-out vec2 v_texture_coords;
-out vec2 v_src_texture_coords;
+out highp vec2 v_texture_coords;
+out highp vec2 v_src_texture_coords;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(vertices, 0.0, 1.0);

impeller/entity/shaders/glyph_atlas.vert

@@ -20,9 +20,9 @@ in vec4 atlas_glyph_bounds;
 in vec4 glyph_bounds;
 
 in vec2 unit_position;
-in vec2 glyph_position;
+in highp vec2 glyph_position;
 
-out vec2 v_uv;
+out highp vec2 v_uv;
 
 mat4 basis(mat4 m) {
   return mat4(m[0][0], m[0][1], m[0][2], 0.0,  //

impeller/entity/shaders/gradient_fill.vert

@@ -11,9 +11,9 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
-out vec2 v_position;
+out highp vec2 v_position;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(position, 0.0, 1.0);

impeller/entity/shaders/linear_to_srgb_filter.vert

@@ -11,7 +11,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
 out highp vec2 v_texture_coords;
 

impeller/entity/shaders/position_color.vert

@@ -10,7 +10,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 in vec4 color;
 
 out vec4 v_color;

impeller/entity/shaders/rrect_blur.vert

@@ -9,9 +9,9 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
-out vec2 v_position;
+out highp vec2 v_position;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(position, 0.0, 1.0);

impeller/entity/shaders/solid_fill.vert

@@ -9,7 +9,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
 void main() {
   gl_Position = frame_info.mvp * vec4(position, 0.0, 1.0);

impeller/entity/shaders/srgb_to_linear_filter.vert

@@ -11,7 +11,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
 out highp vec2 v_texture_coords;
 

impeller/entity/shaders/yuv_to_rgb_filter.vert

@@ -11,7 +11,7 @@ uniform FrameInfo {
 }
 frame_info;
 
-in vec2 position;
+in highp vec2 position;
 
 out highp vec2 v_texture_coords;