diff options
Diffstat (limited to 'src/mbgl/shaders/raster.cpp')
-rw-r--r-- | src/mbgl/shaders/raster.cpp | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/mbgl/shaders/raster.cpp b/src/mbgl/shaders/raster.cpp index b17d013546..67d7542516 100644 --- a/src/mbgl/shaders/raster.cpp +++ b/src/mbgl/shaders/raster.cpp @@ -10,5 +10,88 @@ const char* raster::name = "raster"; const char* raster::vertexSource = source() + 68497; const char* raster::fragmentSource = source() + 69310; +// Uncompressed source of raster.vertex.glsl: +/* +uniform mat4 u_matrix; +uniform vec2 u_tl_parent; +uniform float u_scale_parent; +uniform float u_buffer_scale; + +attribute vec2 a_pos; +attribute vec2 a_texture_pos; + +varying vec2 v_pos0; +varying vec2 v_pos1; + +void main() { + gl_Position = u_matrix * vec4(a_pos, 0, 1); + // We are using Int16 for texture position coordinates to give us enough precision for + // fractional coordinates. We use 8192 to scale the texture coordinates in the buffer + // as an arbitrarily high number to preserve adequate precision when rendering. + // This is also the same value as the EXTENT we are using for our tile buffer pos coordinates, + // so math for modifying either is consistent. + v_pos0 = (((a_texture_pos / 8192.0) - 0.5) / u_buffer_scale ) + 0.5; + v_pos1 = (v_pos0 * u_scale_parent) + u_tl_parent; +} + +*/ + +// Uncompressed source of raster.fragment.glsl: +/* +uniform float u_fade_t; +uniform float u_opacity; +uniform sampler2D u_image0; +uniform sampler2D u_image1; +varying vec2 v_pos0; +varying vec2 v_pos1; + +uniform float u_brightness_low; +uniform float u_brightness_high; + +uniform float u_saturation_factor; +uniform float u_contrast_factor; +uniform vec3 u_spin_weights; + +void main() { + + // read and cross-fade colors from the main and parent tiles + vec4 color0 = texture2D(u_image0, v_pos0); + vec4 color1 = texture2D(u_image1, v_pos1); + if (color0.a > 0.0) { + color0.rgb = color0.rgb / color0.a; + } + if (color1.a > 0.0) { + color1.rgb = color1.rgb / color1.a; + } + vec4 color = mix(color0, color1, u_fade_t); + color.a *= u_opacity; + vec3 rgb = color.rgb; + + // spin + rgb = vec3( + dot(rgb, u_spin_weights.xyz), + dot(rgb, u_spin_weights.zxy), + dot(rgb, u_spin_weights.yzx)); + + // saturation + float average = (color.r + color.g + color.b) / 3.0; + rgb += (average - rgb) * u_saturation_factor; + + // contrast + rgb = (rgb - 0.5) * u_contrast_factor + 0.5; + + // brightness + vec3 u_high_vec = vec3(u_brightness_low, u_brightness_low, u_brightness_low); + vec3 u_low_vec = vec3(u_brightness_high, u_brightness_high, u_brightness_high); + + gl_FragColor = vec4(mix(u_high_vec, u_low_vec, rgb) * color.a, color.a); + +#ifdef OVERDRAW_INSPECTOR + gl_FragColor = vec4(1.0); +#endif +} + +*/ + } // namespace shaders } // namespace mbgl |