diff options
Diffstat (limited to 'src/mbgl/programs/gl/line_pattern.cpp')
| -rw-r--r-- | src/mbgl/programs/gl/line_pattern.cpp | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/src/mbgl/programs/gl/line_pattern.cpp b/src/mbgl/programs/gl/line_pattern.cpp new file mode 100644 index 0000000000..2e9ebaf5ea --- /dev/null +++ b/src/mbgl/programs/gl/line_pattern.cpp @@ -0,0 +1,322 @@ +// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED. + +#include <mbgl/programs/line_pattern_program.hpp> +#include <mbgl/programs/gl/shader_source.hpp> +#include <mbgl/gl/program.hpp> + +namespace mbgl { +namespace gfx { + +template <> +std::unique_ptr<Program<LinePatternProgram>> +Context::createProgram<gl::Context>(const ProgramParameters& programParameters) { + return gl::Program<LinePatternProgram>::createProgram( + reinterpret_cast<gl::Context&>(*this), programParameters, "line_pattern", + programs::gl::shaderSource() + 37841, programs::gl::shaderSource() + 41162); +} + +} // namespace gfx +} // namespace mbgl + +// Uncompressed source of line_pattern.vertex.glsl: +/* +// floor(127 / 2) == 63.0 +// the maximum allowed miter limit is 2.0 at the moment. the extrude normal is +// stored in a byte (-128..127). we scale regular normals up to length 63, but +// there are also "special" normals that have a bigger length (of up to 126 in +// this case). +// #define scale 63.0 +#define scale 0.015873016 + +// We scale the distance before adding it to the buffers so that we can store +// long distances for long segments. Use this value to unscale the distance. +#define LINE_DISTANCE_SCALE 2.0 + +// the distance over which the line edge fades out. +// Retina devices need a smaller distance to avoid aliasing. +#define ANTIALIASING 1.0 / DEVICE_PIXEL_RATIO / 2.0 + +attribute vec4 a_pos_normal; +attribute vec4 a_data; + +uniform mat4 u_matrix; +uniform vec2 u_gl_units_to_pixels; +uniform mediump float u_ratio; + +varying vec2 v_normal; +varying vec2 v_width2; +varying float v_linesofar; +varying float v_gamma_scale; + + +#ifndef HAS_UNIFORM_u_blur +uniform lowp float a_blur_t; +attribute lowp vec2 a_blur; +varying lowp float blur; +#else +uniform lowp float u_blur; +#endif + + +#ifndef HAS_UNIFORM_u_opacity +uniform lowp float a_opacity_t; +attribute lowp vec2 a_opacity; +varying lowp float opacity; +#else +uniform lowp float u_opacity; +#endif + + +#ifndef HAS_UNIFORM_u_offset +uniform lowp float a_offset_t; +attribute lowp vec2 a_offset; +#else +uniform lowp float u_offset; +#endif + + +#ifndef HAS_UNIFORM_u_gapwidth +uniform lowp float a_gapwidth_t; +attribute mediump vec2 a_gapwidth; +#else +uniform mediump float u_gapwidth; +#endif + + +#ifndef HAS_UNIFORM_u_width +uniform lowp float a_width_t; +attribute mediump vec2 a_width; +#else +uniform mediump float u_width; +#endif + + +#ifndef HAS_UNIFORM_u_pattern_from +uniform lowp float a_pattern_from_t; +attribute lowp vec4 a_pattern_from; +varying lowp vec4 pattern_from; +#else +uniform lowp vec4 u_pattern_from; +#endif + + +#ifndef HAS_UNIFORM_u_pattern_to +uniform lowp float a_pattern_to_t; +attribute lowp vec4 a_pattern_to; +varying lowp vec4 pattern_to; +#else +uniform lowp vec4 u_pattern_to; +#endif + + +void main() { + +#ifndef HAS_UNIFORM_u_blur + blur = unpack_mix_vec2(a_blur, a_blur_t); +#else + lowp float blur = u_blur; +#endif + + +#ifndef HAS_UNIFORM_u_opacity + opacity = unpack_mix_vec2(a_opacity, a_opacity_t); +#else + lowp float opacity = u_opacity; +#endif + + +#ifndef HAS_UNIFORM_u_offset + lowp float offset = unpack_mix_vec2(a_offset, a_offset_t); +#else + lowp float offset = u_offset; +#endif + + +#ifndef HAS_UNIFORM_u_gapwidth + mediump float gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t); +#else + mediump float gapwidth = u_gapwidth; +#endif + + +#ifndef HAS_UNIFORM_u_width + mediump float width = unpack_mix_vec2(a_width, a_width_t); +#else + mediump float width = u_width; +#endif + + +#ifndef HAS_UNIFORM_u_pattern_from + pattern_from = a_pattern_from; +#else + mediump vec4 pattern_from = u_pattern_from; +#endif + + +#ifndef HAS_UNIFORM_u_pattern_to + pattern_to = a_pattern_to; +#else + mediump vec4 pattern_to = u_pattern_to; +#endif + + + vec2 a_extrude = a_data.xy - 128.0; + float a_direction = mod(a_data.z, 4.0) - 1.0; + float a_linesofar = (floor(a_data.z / 4.0) + a_data.w * 64.0) * LINE_DISTANCE_SCALE; + // float tileRatio = u_scale.y; + vec2 pos = a_pos_normal.xy; + + // x is 1 if it's a round cap, 0 otherwise + // y is 1 if the normal points up, and -1 if it points down + mediump vec2 normal = a_pos_normal.zw; + v_normal = normal; + + // these transformations used to be applied in the JS and native code bases. + // moved them into the shader for clarity and simplicity. + gapwidth = gapwidth / 2.0; + float halfwidth = width / 2.0; + offset = -1.0 * offset; + + float inset = gapwidth + (gapwidth > 0.0 ? ANTIALIASING : 0.0); + float outset = gapwidth + halfwidth * (gapwidth > 0.0 ? 2.0 : 1.0) + (halfwidth == 0.0 ? 0.0 : ANTIALIASING); + + // Scale the extrusion vector down to a normal and then up by the line width + // of this vertex. + mediump vec2 dist = outset * a_extrude * scale; + + // Calculate the offset when drawing a line that is to the side of the actual line. + // We do this by creating a vector that points towards the extrude, but rotate + // it when we're drawing round end points (a_direction = -1 or 1) since their + // extrude vector points in another direction. + mediump float u = 0.5 * a_direction; + mediump float t = 1.0 - abs(u); + mediump vec2 offset2 = offset * a_extrude * scale * normal.y * mat2(t, -u, u, t); + + vec4 projected_extrude = u_matrix * vec4(dist / u_ratio, 0.0, 0.0); + gl_Position = u_matrix * vec4(pos + offset2 / u_ratio, 0.0, 1.0) + projected_extrude; + + // calculate how much the perspective view squishes or stretches the extrude + float extrude_length_without_perspective = length(dist); + float extrude_length_with_perspective = length(projected_extrude.xy / gl_Position.w * u_gl_units_to_pixels); + v_gamma_scale = extrude_length_without_perspective / extrude_length_with_perspective; + + v_linesofar = a_linesofar; + v_width2 = vec2(outset, inset); +} + +*/ + +// Uncompressed source of line_pattern.fragment.glsl: +/* +uniform vec2 u_texsize; +uniform float u_fade; +uniform mediump vec4 u_scale; + +uniform sampler2D u_image; + +varying vec2 v_normal; +varying vec2 v_width2; +varying float v_linesofar; +varying float v_gamma_scale; + + +#ifndef HAS_UNIFORM_u_pattern_from +varying lowp vec4 pattern_from; +#else +uniform lowp vec4 u_pattern_from; +#endif + + +#ifndef HAS_UNIFORM_u_pattern_to +varying lowp vec4 pattern_to; +#else +uniform lowp vec4 u_pattern_to; +#endif + + +#ifndef HAS_UNIFORM_u_blur +varying lowp float blur; +#else +uniform lowp float u_blur; +#endif + + +#ifndef HAS_UNIFORM_u_opacity +varying lowp float opacity; +#else +uniform lowp float u_opacity; +#endif + + +void main() { + +#ifdef HAS_UNIFORM_u_pattern_from + mediump vec4 pattern_from = u_pattern_from; +#endif + + +#ifdef HAS_UNIFORM_u_pattern_to + mediump vec4 pattern_to = u_pattern_to; +#endif + + + +#ifdef HAS_UNIFORM_u_blur + lowp float blur = u_blur; +#endif + + +#ifdef HAS_UNIFORM_u_opacity + lowp float opacity = u_opacity; +#endif + + + vec2 pattern_tl_a = pattern_from.xy; + vec2 pattern_br_a = pattern_from.zw; + vec2 pattern_tl_b = pattern_to.xy; + vec2 pattern_br_b = pattern_to.zw; + + float pixelRatio = u_scale.x; + float tileZoomRatio = u_scale.y; + float fromScale = u_scale.z; + float toScale = u_scale.w; + + vec2 display_size_a = vec2((pattern_br_a.x - pattern_tl_a.x) / pixelRatio, (pattern_br_a.y - pattern_tl_a.y) / pixelRatio); + vec2 display_size_b = vec2((pattern_br_b.x - pattern_tl_b.x) / pixelRatio, (pattern_br_b.y - pattern_tl_b.y) / pixelRatio); + + vec2 pattern_size_a = vec2(display_size_a.x * fromScale / tileZoomRatio, display_size_a.y); + vec2 pattern_size_b = vec2(display_size_b.x * toScale / tileZoomRatio, display_size_b.y); + + // Calculate the distance of the pixel from the line in pixels. + float dist = length(v_normal) * v_width2.s; + + // Calculate the antialiasing fade factor. This is either when fading in + // the line in case of an offset line (v_width2.t) or when fading out + // (v_width2.s) + float blur2 = (blur + 1.0 / DEVICE_PIXEL_RATIO) * v_gamma_scale; + float alpha = clamp(min(dist - (v_width2.t - blur2), v_width2.s - dist) / blur2, 0.0, 1.0); + + float x_a = mod(v_linesofar / pattern_size_a.x, 1.0); + float x_b = mod(v_linesofar / pattern_size_b.x, 1.0); + + // v_normal.y is 0 at the midpoint of the line, -1 at the lower edge, 1 at the upper edge + // we clamp the line width outset to be between 0 and half the pattern height plus padding (2.0) + // to ensure we don't sample outside the designated symbol on the sprite sheet. + // 0.5 is added to shift the component to be bounded between 0 and 1 for interpolation of + // the texture coordinate + float y_a = 0.5 + (v_normal.y * clamp(v_width2.s, 0.0, (pattern_size_a.y + 2.0) / 2.0) / pattern_size_a.y); + float y_b = 0.5 + (v_normal.y * clamp(v_width2.s, 0.0, (pattern_size_b.y + 2.0) / 2.0) / pattern_size_b.y); + vec2 pos_a = mix(pattern_tl_a / u_texsize, pattern_br_a / u_texsize, vec2(x_a, y_a)); + vec2 pos_b = mix(pattern_tl_b / u_texsize, pattern_br_b / u_texsize, vec2(x_b, y_b)); + + vec4 color = mix(texture2D(u_image, pos_a), texture2D(u_image, pos_b), u_fade); + + gl_FragColor = color * alpha * opacity; + +#ifdef OVERDRAW_INSPECTOR + gl_FragColor = vec4(1.0); +#endif +} + +*/ + |