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authorJohn Firebaugh <john.firebaugh@gmail.com>2017-06-12 16:39:59 -0700
committerJohn Firebaugh <john.firebaugh@gmail.com>2017-06-13 08:41:39 -0700
commit31bf6719fc845cd83de82b8968b9cd4407f663b7 (patch)
treeaade44100ca17a5901fd68fb5599ec0da9569c2e /src/mbgl/shaders
parent5a2dd1b5df6d2f1f37e940b43cc727b95ae08e8a (diff)
downloadqtlocation-mapboxgl-31bf6719fc845cd83de82b8968b9cd4407f663b7.tar.gz
[core] Reduce number of varyings to 8 or less
For #pragmas, don't generate varyings for attributes that aren't used by the fragment shader. Pack other varyings more tightly.
Diffstat (limited to 'src/mbgl/shaders')
-rw-r--r--src/mbgl/shaders/circle.cpp24
-rw-r--r--src/mbgl/shaders/line.cpp6
-rw-r--r--src/mbgl/shaders/line_pattern.cpp6
-rw-r--r--src/mbgl/shaders/line_sdf.cpp6
-rw-r--r--src/mbgl/shaders/symbol_sdf.cpp49
5 files changed, 46 insertions, 45 deletions
diff --git a/src/mbgl/shaders/circle.cpp b/src/mbgl/shaders/circle.cpp
index 1c977d2bce..2ecceeca70 100644
--- a/src/mbgl/shaders/circle.cpp
+++ b/src/mbgl/shaders/circle.cpp
@@ -35,8 +35,7 @@ uniform lowp float a_stroke_opacity_t;
attribute lowp vec2 a_stroke_opacity;
varying lowp float stroke_opacity;
-varying vec2 v_extrude;
-varying lowp float v_antialiasblur;
+varying vec3 v_data;
void main(void) {
color = unpack_mix_vec4(a_color, a_color_t);
@@ -48,23 +47,24 @@ void main(void) {
stroke_opacity = unpack_mix_vec2(a_stroke_opacity, a_stroke_opacity_t);
// unencode the extrusion vector that we snuck into the a_pos vector
- v_extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
+ vec2 extrude = vec2(mod(a_pos, 2.0) * 2.0 - 1.0);
- vec2 extrude = v_extrude * (radius + stroke_width) * u_extrude_scale;
// multiply a_pos by 0.5, since we had it * 2 in order to sneak
// in extrusion data
gl_Position = u_matrix * vec4(floor(a_pos * 0.5), 0, 1);
if (u_scale_with_map) {
- gl_Position.xy += extrude;
+ gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale;
} else {
- gl_Position.xy += extrude * gl_Position.w;
+ gl_Position.xy += extrude * (radius + stroke_width) * u_extrude_scale * gl_Position.w;
}
// This is a minimum blur distance that serves as a faux-antialiasing for
// the circle. since blur is a ratio of the circle's size and the intent is
// to keep the blur at roughly 1px, the two are inversely related.
- v_antialiasblur = 1.0 / DEVICE_PIXEL_RATIO / (radius + stroke_width);
+ lowp float antialiasblur = 1.0 / DEVICE_PIXEL_RATIO / (radius + stroke_width);
+
+ v_data = vec3(extrude.x, extrude.y, antialiasblur);
}
)MBGL_SHADER";
@@ -77,8 +77,7 @@ varying highp vec4 stroke_color;
varying mediump float stroke_width;
varying lowp float stroke_opacity;
-varying vec2 v_extrude;
-varying lowp float v_antialiasblur;
+varying vec3 v_data;
void main() {
@@ -89,8 +88,11 @@ void main() {
- float extrude_length = length(v_extrude);
- float antialiased_blur = -max(blur, v_antialiasblur);
+ vec2 extrude = v_data.xy;
+ float extrude_length = length(extrude);
+
+ lowp float antialiasblur = v_data.z;
+ float antialiased_blur = -max(blur, antialiasblur);
float opacity_t = smoothstep(0.0, antialiased_blur, extrude_length - 1.0);
diff --git a/src/mbgl/shaders/line.cpp b/src/mbgl/shaders/line.cpp
index 4392bd051f..e101cf6ee1 100644
--- a/src/mbgl/shaders/line.cpp
+++ b/src/mbgl/shaders/line.cpp
@@ -44,17 +44,15 @@ attribute lowp vec2 a_opacity;
varying lowp float opacity;
uniform lowp float a_gapwidth_t;
attribute mediump vec2 a_gapwidth;
-varying mediump float gapwidth;
uniform lowp float a_offset_t;
attribute lowp vec2 a_offset;
-varying lowp float offset;
void main() {
color = unpack_mix_vec4(a_color, a_color_t);
blur = unpack_mix_vec2(a_blur, a_blur_t);
opacity = unpack_mix_vec2(a_opacity, a_opacity_t);
- gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
- offset = unpack_mix_vec2(a_offset, a_offset_t);
+ mediump float gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
+ lowp float offset = unpack_mix_vec2(a_offset, a_offset_t);
vec2 a_extrude = a_data.xy - 128.0;
float a_direction = mod(a_data.z, 4.0) - 1.0;
diff --git a/src/mbgl/shaders/line_pattern.cpp b/src/mbgl/shaders/line_pattern.cpp
index 6eb9d67700..a413d98e9f 100644
--- a/src/mbgl/shaders/line_pattern.cpp
+++ b/src/mbgl/shaders/line_pattern.cpp
@@ -44,16 +44,14 @@ attribute lowp vec2 a_opacity;
varying lowp float opacity;
uniform lowp float a_offset_t;
attribute lowp vec2 a_offset;
-varying lowp float offset;
uniform lowp float a_gapwidth_t;
attribute mediump vec2 a_gapwidth;
-varying mediump float gapwidth;
void main() {
blur = unpack_mix_vec2(a_blur, a_blur_t);
opacity = unpack_mix_vec2(a_opacity, a_opacity_t);
- offset = unpack_mix_vec2(a_offset, a_offset_t);
- gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
+ lowp float offset = unpack_mix_vec2(a_offset, a_offset_t);
+ mediump float gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
vec2 a_extrude = a_data.xy - 128.0;
float a_direction = mod(a_data.z, 4.0) - 1.0;
diff --git a/src/mbgl/shaders/line_sdf.cpp b/src/mbgl/shaders/line_sdf.cpp
index 17a6a19739..4f6cf814f9 100644
--- a/src/mbgl/shaders/line_sdf.cpp
+++ b/src/mbgl/shaders/line_sdf.cpp
@@ -52,17 +52,15 @@ attribute lowp vec2 a_opacity;
varying lowp float opacity;
uniform lowp float a_gapwidth_t;
attribute mediump vec2 a_gapwidth;
-varying mediump float gapwidth;
uniform lowp float a_offset_t;
attribute lowp vec2 a_offset;
-varying lowp float offset;
void main() {
color = unpack_mix_vec4(a_color, a_color_t);
blur = unpack_mix_vec2(a_blur, a_blur_t);
opacity = unpack_mix_vec2(a_opacity, a_opacity_t);
- gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
- offset = unpack_mix_vec2(a_offset, a_offset_t);
+ mediump float gapwidth = unpack_mix_vec2(a_gapwidth, a_gapwidth_t);
+ lowp float offset = unpack_mix_vec2(a_offset, a_offset_t);
vec2 a_extrude = a_data.xy - 128.0;
float a_direction = mod(a_data.z, 4.0) - 1.0;
diff --git a/src/mbgl/shaders/symbol_sdf.cpp b/src/mbgl/shaders/symbol_sdf.cpp
index 194e624036..0c39c5f4ac 100644
--- a/src/mbgl/shaders/symbol_sdf.cpp
+++ b/src/mbgl/shaders/symbol_sdf.cpp
@@ -57,10 +57,8 @@ uniform vec2 u_extrude_scale;
uniform vec2 u_texsize;
-varying vec2 v_tex;
-varying vec2 v_fade_tex;
-varying float v_gamma_scale;
-varying float v_size;
+varying vec4 v_data0;
+varying vec2 v_data1;
void main() {
fill_color = unpack_mix_vec4(a_fill_color, a_fill_color_t);
@@ -81,6 +79,7 @@ void main() {
mediump vec2 a_zoom = unpack_float(a_data[3]);
mediump float a_minzoom = a_zoom[0];
mediump float a_maxzoom = a_zoom[1];
+ float size;
// In order to accommodate placing labels around corners in
// symbol-placement: line, each glyph in a label could have multiple
@@ -92,22 +91,22 @@ void main() {
// based on the scale of rendered text size relative to layout text size.
mediump float layoutSize;
if (!u_is_size_zoom_constant && !u_is_size_feature_constant) {
- v_size = mix(a_size[0], a_size[1], u_size_t) / 10.0;
+ size = mix(a_size[0], a_size[1], u_size_t) / 10.0;
layoutSize = a_size[2] / 10.0;
} else if (u_is_size_zoom_constant && !u_is_size_feature_constant) {
- v_size = a_size[0] / 10.0;
- layoutSize = v_size;
+ size = a_size[0] / 10.0;
+ layoutSize = size;
} else if (!u_is_size_zoom_constant && u_is_size_feature_constant) {
- v_size = u_size;
+ size = u_size;
layoutSize = u_layout_size;
} else {
- v_size = u_size;
+ size = u_size;
layoutSize = u_size;
}
- float fontScale = u_is_text ? v_size / 24.0 : v_size;
+ float fontScale = u_is_text ? size / 24.0 : size;
- mediump float zoomAdjust = log2(v_size / layoutSize);
+ mediump float zoomAdjust = log2(size / layoutSize);
mediump float adjustedZoom = (u_zoom - zoomAdjust) * 10.0;
// result: z = 0 if a_minzoom <= adjustedZoom < a_maxzoom, and 1 otherwise
// Used below to move the vertex out of the clip space for when the current
@@ -156,10 +155,13 @@ void main() {
gl_Position = u_matrix * vec4(a_pos, 0, 1) + vec4(extrude, 0, 0);
}
- v_gamma_scale = gl_Position.w;
+ float gamma_scale = gl_Position.w;
- v_tex = a_tex / u_texsize;
- v_fade_tex = vec2(a_labelminzoom / 255.0, 0.0);
+ vec2 tex = a_tex / u_texsize;
+ vec2 fade_tex = vec2(a_labelminzoom / 255.0, 0.0);
+
+ v_data0 = vec4(tex.x, tex.y, fade_tex.x, fade_tex.y);
+ v_data1 = vec2(gamma_scale, size);
}
)MBGL_SHADER";
@@ -179,10 +181,8 @@ uniform sampler2D u_fadetexture;
uniform highp float u_gamma_scale;
uniform bool u_is_text;
-varying vec2 v_tex;
-varying vec2 v_fade_tex;
-varying float v_gamma_scale;
-varying float v_size;
+varying vec4 v_data0;
+varying vec2 v_data1;
void main() {
@@ -191,7 +191,12 @@ void main() {
- float fontScale = u_is_text ? v_size / 24.0 : v_size;
+ vec2 tex = v_data0.xy;
+ vec2 fade_tex = v_data0.zw;
+ float gamma_scale = v_data1.x;
+ float size = v_data1.y;
+
+ float fontScale = u_is_text ? size / 24.0 : size;
lowp vec4 color = fill_color;
highp float gamma = EDGE_GAMMA / (fontScale * u_gamma_scale);
@@ -202,9 +207,9 @@ void main() {
buff = (6.0 - halo_width / fontScale) / SDF_PX;
}
- lowp float dist = texture2D(u_texture, v_tex).a;
- lowp float fade_alpha = texture2D(u_fadetexture, v_fade_tex).a;
- highp float gamma_scaled = gamma * v_gamma_scale;
+ lowp float dist = texture2D(u_texture, tex).a;
+ lowp float fade_alpha = texture2D(u_fadetexture, fade_tex).a;
+ highp float gamma_scaled = gamma * gamma_scale;
highp float alpha = smoothstep(buff - gamma_scaled, buff + gamma_scaled, dist) * fade_alpha;
gl_FragColor = color * (alpha * opacity);