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do premultiplication of alpha in blend function

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This commit is contained in:
Hannes Janetzek
2012-06-21 14:18:16 +02:00
parent b4f5d9fb19
commit 8b630eebc9
4 changed files with 88 additions and 50 deletions
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6
src/org/mapsforge/android/glrenderer/LineLayer.java
View File

@@ -43,9 +43,9 @@ class LineLayer extends Layer {
float a = (color >> 24 & 0xff) / 255.0f;
colors[0] = (color >> 16 & 0xff) / 255.0f * a;
colors[1] = (color >> 8 & 0xff) / 255.0f * a;
colors[2] = (color >> 0 & 0xff) / 255.0f * a;
colors[0] = (color >> 16 & 0xff) / 255.0f;
colors[1] = (color >> 8 & 0xff) / 255.0f;
colors[2] = (color >> 0 & 0xff) / 255.0f;
colors[3] = a;
}

18
src/org/mapsforge/android/glrenderer/MapRenderer.java
View File

@@ -463,9 +463,9 @@ public class MapRenderer implements org.mapsforge.android.MapRenderer {
}
GLES20.glUniform4f(gPolygonColorHandle,
(color >> 16 & 0xff) / 255f * alpha,
(color >> 8 & 0xff) / 255f * alpha,
(color & 0xff) / 255f * alpha, alpha);
(color >> 16 & 0xff) / 255f,
(color >> 8 & 0xff) / 255f,
(color & 0xff) / 255f, alpha);
// set stencil buffer mask used to draw this layer
GLES20.glStencilFunc(GLES20.GL_EQUAL, 0xff, 1 << c);
@@ -540,11 +540,11 @@ public class MapRenderer implements org.mapsforge.android.MapRenderer {
else {
// clear stencilbuffer
GLES20.glStencilMask(0xFF);
GLES20.glClear(GLES20.GL_STENCIL_BUFFER_BIT);
// GLES20.glClear(GLES20.GL_STENCIL_BUFFER_BIT);
// clear stencilbuffer (tile region)
// GLES20.glStencilOp(GLES20.GL_ZERO, GLES20.GL_ZERO, GLES20.GL_ZERO);
// GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLES20.glStencilOp(GLES20.GL_ZERO, GLES20.GL_ZERO, GLES20.GL_ZERO);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
}
// stencil op for stencil method polygon drawing
@@ -562,7 +562,7 @@ public class MapRenderer implements org.mapsforge.android.MapRenderer {
continue;
// modify alpha channel
float s = ((mDrawScale / z) < 1.3f ? 1.3f : (mDrawScale / z));
float s = (mDrawScale > 1.3f ? mDrawScale : 1.3f);
colors[cnt] = (colors[cnt] & 0xffffff)
| (byte) ((s - 1) * 0xff) << 24;
}
@@ -1094,10 +1094,10 @@ public class MapRenderer implements org.mapsforge.android.MapRenderer {
GLES20.glEnableVertexAttribArray(gLineVertexPositionHandle);
GLES20.glEnableVertexAttribArray(gLineTexturePositionHandle);
GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
GLES20.glDisable(GLES20.GL_DEPTH_TEST);
GLES20.glDisable(GLES20.GL_DITHER);
GLES20.glClearColor(0.96f, 0.96f, 0.95f, 1.0f);
GLES20.glClearColor(0.98f, 0.98f, 0.975f, 1.0f);
GLES20.glClearStencil(0);
}

70
src/org/mapsforge/android/glrenderer/Shaders.java
View File

@@ -19,7 +19,6 @@ class Shaders {
final static String gLineVertexShader = ""
+ "precision mediump float; \n"
+ "uniform mat4 u_center;"
// + "uniform float u_width;"
+ "attribute vec4 a_position;"
+ "attribute vec2 a_st;"
+ "varying vec2 v_st;"
@@ -30,31 +29,65 @@ class Shaders {
final static String gLineFragmentShader = ""
+ "#extension GL_OES_standard_derivatives : enable\n"
+ "#pragma profilepragma blendoperation(gl_FragColor, GL_FUNC_ADD, GL_ONE, GL_ONE_MINUS_SRC_ALPHA)\n"
+ "precision mediump float;"
+ "uniform vec2 u_mode;"
+ "uniform vec4 u_color;"
+ "const float zero = 0.0;"
+ "const vec4 blank = vec4(0.0,0.0,0.0,0.0);"
+ "const float fuzzf = 1.5;"
// + "const vec4 blank = vec4(0.0,0.0,0.0,0.0);"
+ "varying vec2 v_st;"
+ "void main() {"
+ "float width = u_mode[1];"
+ " if (v_st.t == zero){ "
+ " float fuzz = fwidth(v_st.s) * 1.5;"
+ " float min_fuzz = -fuzz * u_mode[0];"
+ " float len = width - abs(v_st.s);"
// + " if (len > fuzz)"
// + " gl_FragColor = u_color;"
// + " else if (len < min_fuzz)"
// + " gl_FragColor = blank;"
// + " else"
+ " gl_FragColor = u_color * smoothstep(min_fuzz, fuzz, len);"
+ " } else {"
+ " float fuzz = max(fwidth(v_st.s), fwidth(v_st.t)) * 1.5;"
+ " gl_FragColor = u_color * smoothstep(-fuzz * u_mode[0], fuzz, width - length(v_st));"
+ " } "
+ " lowp vec4 color = u_color;"
+ " lowp float len;"
+ " lowp float fuzz;"
+ " lowp float width = u_mode[1];"
+ " if (v_st.t == zero){ "
+ " fuzz = fwidth(v_st.s) * fuzzf;"
+ " len = width - abs(v_st.s);"
+ " } else {"
+ " fuzz = max(fwidth(v_st.s), fwidth(v_st.t)) * fuzzf;"
+ " len = width - length(v_st);"
+ " } "
+ " lowp float min_fuzz = -fuzz * u_mode[0];"
+ " if (len < min_fuzz)"
+ " discard;"
// + " color = blank;"
+ " else {"
+ " if (len < fuzz)"
+ " color.a *= smoothstep(min_fuzz, fuzz, len);"
+ " gl_FragColor = color;"
+ " }"
+ "}";
// final static String gLineFragmentShader = ""
// + "#extension GL_OES_standard_derivatives : enable\n"
// + "#pragma profilepragma blendoperation(gl_FragColor, GL_FUNC_ADD, GL_ONE, GL_ONE_MINUS_SRC_ALPHA)\n"
// + "precision mediump float;"
// + "uniform vec2 u_mode;"
// + "uniform vec4 u_color;"
// + "const float zero = 0.0;"
// + "const vec4 blank = vec4(0.0,0.0,0.0,0.0);"
// + "varying vec2 v_st;"
// + "void main() {"
// + "lowp color = u_color;"
// + "lowp alpha = 1.0;"
// + "float width = u_mode[1];"
// + " if (v_st.t == zero){ "
// + " float fuzz = fwidth(v_st.s) * 1.5;"
// + " float min_fuzz = -fuzz * u_mode[0];"
// + " float len = width - abs(v_st.s);"
// // + " if (len > fuzz)"
// // + " gl_FragColor = u_color;"
// // + " else if (len < min_fuzz)"
// // + " gl_FragColor = blank;"
// // + " else"
// + " gl_FragColor = u_color * smoothstep(min_fuzz, fuzz, len);"
// + " } else {"
// + " float fuzz = max(fwidth(v_st.s), fwidth(v_st.t)) * 1.5;"
// + " gl_FragColor = u_color * smoothstep(-fuzz * u_mode[0], fuzz, width - length(v_st));"
// + " } "
// + "glFragColor = color"
// + "}";
// final static String gLineFragmentShader = ""
// + "#extension GL_OES_standard_derivatives : enable\n"
// + "precision mediump float;"
@@ -135,7 +168,6 @@ class Shaders {
+ "}";
final static String gPolygonFragmentShader = ""
+ "#pragma profilepragma blendoperation(gl_FragColor, GL_FUNC_ADD, GL_ONE, GL_ONE_MINUS_SRC_ALPHA)\n"
+ "precision mediump float;"
+ "uniform vec4 u_color;"
+ "void main() {"

44
src/org/mapsforge/android/rendertheme/osmarender/osmarender.xml
View File

@@ -56,12 +56,12 @@
stroke-linecap="butt" />
</rule>
<rule e="way" k="*"
v="pedestrian|unclassified|residential|living_street|byway">
v="pedestrian|unclassified|residential|living_street|byway|tertiary">
<line stroke="#ffffff" stroke-width="1.3" outline="0"
stroke-linecap="butt" />
</rule>
<rule e="way" k="*"
v="tertiary|secondary_link|primary_link|trunk_link|motorway_link|secondary|primary">
v="secondary_link|primary_link|trunk_link|motorway_link|secondary|primary">
<line stroke="#bbffff9a" stroke-width="1.5" outline="0"
stroke-linecap="butt" />
</rule>
@@ -106,16 +106,22 @@
<rule e="way" k="*" v="farmland|farm">
<area fill="#fff8bf" fade="12" />
</rule>
<rule e="way" k="*" v="allotments|village_green|recreation_ground">
<area fill="#c9d8a2" fade="12" />
</rule>
<!-- <rule e="way" k="*" v="village_green|recreation_ground">
<area fill="#daebaf" fade="12" />
</rule> -->
<!-- <rule e="way" k="*" v="allotments|village_green|recreation_ground">
<area fill="#e7f7c1" fade="12" />
</rule> -->
<rule e="way" k="*" v="reservoir|basin">
<area fill="#b4cbdc" />
</rule>
</rule>
<rule e="way" k="leisure|landuse" v="allotments|village_green|recreation_ground|garden|golf_course|dog_park" zoom-min="12">
<area fill="#e7f7c1" fade="12" />
</rule>
<rule e="way" k="leisure" v="*" zoom-min="12">
<rule e="way" k="*" v="park|common|green">
@@ -160,7 +166,7 @@
<area fill="#f8f8f8" />
</rule>
<rule e="way" k="*" v="beach">
<area fill="#eecc55" />
<area fill="#fcfeab" />
</rule>
<!-- Heideland -->
<rule e="way" k="*" v="heath">
@@ -173,23 +179,23 @@
<!-- leisure -->
<rule e="way" k="leisure" v="*" zoom-min="12">
<rule e="way" k="leisure" v="*" zoom-min="13">
<rule e="way" k="*" v="garden|golf_course">
<area fill="#d7e6b0" fade="12" />
<!-- playground| -->
<!-- sollte unter playing field sein -->
<rule e="way" k="*" zoom_min="14" v="sports_centre|water_park">
<area fill="#daefdb" fade="12" />
</rule>
<rule e="way" k="*" v="*" zoom-min="15">
<rule e="way" k="*" v="playground|playing_fields|pitch|dog_park">
<area fill="#d7e6b0" stroke="#b7c690" stroke-width="0.2" />
<rule e="way" k="*" v="playing_fields|pitch">
<area fill="#f4f4de" />
<line stroke="#dbdbc8" stroke-width="0.6" fixed="true"
stroke-linecap="butt" />
</rule>
</rule>
<rule e="way" k="*" v="sports_centre|water_park">
<area fill="#c9d8a2" fade="12" />
</rule>
<!-- <rule e="way" k="*" v="track"> <rule e="way" k="area" v="yes|true">
<area fill="#c9d8a2" stroke="#b7c690" stroke-width="0.025" /> </rule> <rule
e="way" k="area" v="~|no|false"> <line stroke="#b7c690" stroke-width="0.75"
@@ -332,7 +338,7 @@
<rule e="way" k="outline" v="*">
<rule e="way" k="*" v="1">
<outline stroke="#bb909090" />
<outline stroke="#909090" />
</rule>
<rule e="way" k="*" v="2">
<outline stroke="#c0c0c0" />