mth/ebiten
1
0
Fork 0
mirror of https://github.com/hajimehoshi/ebiten.git synced 2024-12-25 19:28:57 +01:00
Code Issues Packages Projects Releases Wiki Activity

examples/shader: Always use 1 for an alpha

Browse Source 
This is necessary to keep the color pre-multiplied
This commit is contained in:
Hajime Hoshi 2020-08-16 02:34:18 +09:00
parent 06ed4f5444
commit 05a1c2faa1
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
examples/shader/water.go
View File

@ -32,11 +32,11 @@ func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
xoffset := (4 / srcsize.x) * cos(Time*3+texCoord.y*200)
yoffset := (20 / srcsize.y) * (1.0 + cos(Time*3+texCoord.y*50))
bordertex := border / srcsize.y
clr := vec4(image2TextureBoundsAt(vec2(
clr := image2TextureBoundsAt(vec2(
texCoord.x+xoffset,
-(texCoord.y+yoffset-rorigin.y)+bordertex*2+rorigin.y,
)))
)).rgb
overlay := vec4(0.5, 1, 1, 1)
return mix(clr, overlay, 0.25)
overlay := vec3(0.5, 1, 1)
return vec4(mix(clr, overlay, 0.25), 1)
}

2
examples/shader/water_go.go
View File

@ -2,4 +2,4 @@
package main
var water_go = []byte("// Copyright 2020 The Ebiten Authors\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// +build ignore\n\npackage main\n\nvar Time float\nvar Cursor vec2\nvar ScreenSize vec2\n\nfunc Fragment(position vec4, texCoord vec2, color vec4) vec4 {\n\tborder := ScreenSize.y*0.6 + 4*cos(Time*3+texCoord.y*200)\n\tif position.y < border {\n\t\treturn image2TextureAt(texCoord)\n\t}\n\n\tsrcsize := imageSrcTextureSize()\n\trorigin, rsize := imageSrcTextureSourceRegion()\n\n\txoffset := (4 / srcsize.x) * cos(Time*3+texCoord.y*200)\n\tyoffset := (20 / srcsize.y) * (1.0 + cos(Time*3+texCoord.y*50))\n\tbordertex := border / srcsize.y\n\tclr := vec4(image2TextureBoundsAt(vec2(\n\t\ttexCoord.x+xoffset,\n\t\t-(texCoord.y+yoffset-rorigin.y)+bordertex*2+rorigin.y,\n\t)))\n\n\toverlay := vec4(0.5, 1, 1, 1)\n\treturn mix(clr, overlay, 0.25)\n}\n")
var water_go = []byte("// Copyright 2020 The Ebiten Authors\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// +build ignore\n\npackage main\n\nvar Time float\nvar Cursor vec2\nvar ScreenSize vec2\n\nfunc Fragment(position vec4, texCoord vec2, color vec4) vec4 {\n\tborder := ScreenSize.y*0.6 + 4*cos(Time*3+texCoord.y*200)\n\tif position.y < border {\n\t\treturn image2TextureAt(texCoord)\n\t}\n\n\tsrcsize := imageSrcTextureSize()\n\trorigin, rsize := imageSrcTextureSourceRegion()\n\n\txoffset := (4 / srcsize.x) * cos(Time*3+texCoord.y*200)\n\tyoffset := (20 / srcsize.y) * (1.0 + cos(Time*3+texCoord.y*50))\n\tbordertex := border / srcsize.y\n\tclr := image2TextureBoundsAt(vec2(\n\t\ttexCoord.x+xoffset,\n\t\t-(texCoord.y+yoffset-rorigin.y)+bordertex*2+rorigin.y,\n\t)).rgb\n\n\toverlay := vec3(0.5, 1, 1)\n\treturn vec4(mix(clr, overlay, 0.25), 1)\n}\n")