From b83b14feb0b99d669fb84a52ab356051368de637 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Wed, 8 Mar 2017 08:55:55 -0800
Subject: [core] De-duplicate shader prelude source

---
 src/mbgl/shaders/fill.cpp | 71 -----------------------------------------------
 1 file changed, 71 deletions(-)

(limited to 'src/mbgl/shaders/fill.cpp')

diff --git a/src/mbgl/shaders/fill.cpp b/src/mbgl/shaders/fill.cpp
index 066adee447..d0fc3a7033 100644
--- a/src/mbgl/shaders/fill.cpp
+++ b/src/mbgl/shaders/fill.cpp
@@ -7,60 +7,6 @@ namespace shaders {
 
 const char* fill::name = "fill";
 const char* fill::vertexSource = R"MBGL_SHADER(
-#ifdef GL_ES
-precision highp float;
-#else
-
-#if !defined(lowp)
-#define lowp
-#endif
-
-#if !defined(mediump)
-#define mediump
-#endif
-
-#if !defined(highp)
-#define highp
-#endif
-
-#endif
-
-float evaluate_zoom_function_1(const vec4 values, const float t) {
-    if (t < 1.0) {
-        return mix(values[0], values[1], t);
-    } else if (t < 2.0) {
-        return mix(values[1], values[2], t - 1.0);
-    } else {
-        return mix(values[2], values[3], t - 2.0);
-    }
-}
-vec4 evaluate_zoom_function_4(const vec4 value0, const vec4 value1, const vec4 value2, const vec4 value3, const float t) {
-    if (t < 1.0) {
-        return mix(value0, value1, t);
-    } else if (t < 2.0) {
-        return mix(value1, value2, t - 1.0);
-    } else {
-        return mix(value2, value3, t - 2.0);
-    }
-}
-
-// The offset depends on how many pixels are between the world origin and the edge of the tile:
-// vec2 offset = mod(pixel_coord, size)
-//
-// At high zoom levels there are a ton of pixels between the world origin and the edge of the tile.
-// The glsl spec only guarantees 16 bits of precision for highp floats. We need more than that.
-//
-// The pixel_coord is passed in as two 16 bit values:
-// pixel_coord_upper = floor(pixel_coord / 2^16)
-// pixel_coord_lower = mod(pixel_coord, 2^16)
-//
-// The offset is calculated in a series of steps that should preserve this precision:
-vec2 get_pattern_pos(const vec2 pixel_coord_upper, const vec2 pixel_coord_lower,
-    const vec2 pattern_size, const float tile_units_to_pixels, const vec2 pos) {
-
-    vec2 offset = mod(mod(mod(pixel_coord_upper, pattern_size) * 256.0, pattern_size) * 256.0 + pixel_coord_lower, pattern_size);
-    return (tile_units_to_pixels * pos + offset) / pattern_size;
-}
 attribute vec2 a_pos;
 
 uniform mat4 u_matrix;
@@ -83,23 +29,6 @@ void main() {
 
 )MBGL_SHADER";
 const char* fill::fragmentSource = R"MBGL_SHADER(
-#ifdef GL_ES
-precision mediump float;
-#else
-
-#if !defined(lowp)
-#define lowp
-#endif
-
-#if !defined(mediump)
-#define mediump
-#endif
-
-#if !defined(highp)
-#define highp
-#endif
-
-#endif
 varying lowp vec4 color;
 varying lowp float opacity;
 
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