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Diffstat (limited to 'src/mbgl/shaders/fill_pattern.hpp')
-rw-r--r-- | src/mbgl/shaders/fill_pattern.hpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/mbgl/shaders/fill_pattern.hpp b/src/mbgl/shaders/fill_pattern.hpp new file mode 100644 index 0000000000..eeb0a80936 --- /dev/null +++ b/src/mbgl/shaders/fill_pattern.hpp @@ -0,0 +1,148 @@ +#pragma once + +// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED. + +#include <mbgl/gl/gl.hpp> + +namespace mbgl { +namespace shaders { + +class fill_pattern { +public: + static constexpr const char* name = "fill_pattern"; + static constexpr const char* 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; +} +uniform mat4 u_matrix; +uniform vec2 u_pattern_size_a; +uniform vec2 u_pattern_size_b; +uniform vec2 u_pixel_coord_upper; +uniform vec2 u_pixel_coord_lower; +uniform float u_scale_a; +uniform float u_scale_b; +uniform float u_tile_units_to_pixels; + +attribute vec2 a_pos; + +varying vec2 v_pos_a; +varying vec2 v_pos_b; + +uniform lowp float a_opacity_t; +attribute lowp float a_opacity_min; +attribute lowp float a_opacity_max; +varying lowp float opacity; + +void main() { + opacity = mix(a_opacity_min, a_opacity_max, a_opacity_t); + + gl_Position = u_matrix * vec4(a_pos, 0, 1); + + v_pos_a = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, u_scale_a * u_pattern_size_a, u_tile_units_to_pixels, a_pos); + v_pos_b = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, u_scale_b * u_pattern_size_b, u_tile_units_to_pixels, a_pos); +} +)MBGL_SHADER"; + static constexpr const char* 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 +uniform vec2 u_pattern_tl_a; +uniform vec2 u_pattern_br_a; +uniform vec2 u_pattern_tl_b; +uniform vec2 u_pattern_br_b; +uniform float u_mix; + +uniform sampler2D u_image; + +varying vec2 v_pos_a; +varying vec2 v_pos_b; + +varying lowp float opacity; + +void main() { + + + vec2 imagecoord = mod(v_pos_a, 1.0); + vec2 pos = mix(u_pattern_tl_a, u_pattern_br_a, imagecoord); + vec4 color1 = texture2D(u_image, pos); + + vec2 imagecoord_b = mod(v_pos_b, 1.0); + vec2 pos2 = mix(u_pattern_tl_b, u_pattern_br_b, imagecoord_b); + vec4 color2 = texture2D(u_image, pos2); + + gl_FragColor = mix(color1, color2, u_mix) * opacity; + +#ifdef OVERDRAW_INSPECTOR + gl_FragColor = vec4(1.0); +#endif +} +)MBGL_SHADER"; +}; + +} // namespace shaders +} // namespace mbgl |