diff options
Diffstat (limited to 'src/mbgl/shaders/symbol_sdf.cpp')
| -rw-r--r-- | src/mbgl/shaders/symbol_sdf.cpp | 102 |
1 files changed, 14 insertions, 88 deletions
diff --git a/src/mbgl/shaders/symbol_sdf.cpp b/src/mbgl/shaders/symbol_sdf.cpp index e087242bf8..76399dbb55 100644 --- a/src/mbgl/shaders/symbol_sdf.cpp +++ b/src/mbgl/shaders/symbol_sdf.cpp @@ -7,86 +7,26 @@ namespace shaders { const char* symbol_sdf::name = "symbol_sdf"; const char* symbol_sdf::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; -} const float PI = 3.141592653589793; -attribute vec2 a_pos; -attribute vec2 a_offset; +attribute vec4 a_pos_offset; attribute vec2 a_texture_pos; attribute vec4 a_data; uniform lowp float a_fill_color_t; -attribute lowp vec4 a_fill_color_min; -attribute lowp vec4 a_fill_color_max; +attribute lowp vec4 a_fill_color; varying lowp vec4 fill_color; uniform lowp float a_halo_color_t; -attribute lowp vec4 a_halo_color_min; -attribute lowp vec4 a_halo_color_max; +attribute lowp vec4 a_halo_color; varying lowp vec4 halo_color; uniform lowp float a_opacity_t; -attribute lowp float a_opacity_min; -attribute lowp float a_opacity_max; +attribute lowp vec2 a_opacity; varying lowp float opacity; uniform lowp float a_halo_width_t; -attribute lowp float a_halo_width_min; -attribute lowp float a_halo_width_max; +attribute lowp vec2 a_halo_width; varying lowp float halo_width; uniform lowp float a_halo_blur_t; -attribute lowp float a_halo_blur_min; -attribute lowp float a_halo_blur_max; +attribute lowp vec2 a_halo_blur; varying lowp float halo_blur; // matrix is for the vertex position. @@ -107,11 +47,14 @@ varying vec2 v_fade_tex; varying float v_gamma_scale; void main() { - fill_color = mix(a_fill_color_min, a_fill_color_max, a_fill_color_t); - halo_color = mix(a_halo_color_min, a_halo_color_max, a_halo_color_t); - opacity = mix(a_opacity_min, a_opacity_max, a_opacity_t); - halo_width = mix(a_halo_width_min, a_halo_width_max, a_halo_width_t); - halo_blur = mix(a_halo_blur_min, a_halo_blur_max, a_halo_blur_t); + fill_color = unpack_mix_vec4(a_fill_color, a_fill_color_t); + halo_color = unpack_mix_vec4(a_halo_color, a_halo_color_t); + opacity = unpack_mix_vec2(a_opacity, a_opacity_t); + halo_width = unpack_mix_vec2(a_halo_width, a_halo_width_t); + halo_blur = unpack_mix_vec2(a_halo_blur, a_halo_blur_t); + + vec2 a_pos = a_pos_offset.xy; + vec2 a_offset = a_pos_offset.zw; vec2 a_tex = a_texture_pos.xy; mediump float a_labelminzoom = a_data[0]; @@ -172,23 +115,6 @@ void main() { )MBGL_SHADER"; const char* symbol_sdf::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 #define SDF_PX 8.0 #define EDGE_GAMMA 0.105/DEVICE_PIXEL_RATIO |