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new blending function for SpriteGlow, which now uses no alpha channel; reduced the number of framebuffer used to draw a world from 2 to 1.

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Former-commit-id: 823182690f0c0dfc73a46474e194cbf6470fe5ad
Former-commit-id: 9c4e041ef2799841d905c2b6dc32d578d9c082a3
This commit is contained in:
Song Minjae
2016-12-25 16:33:56 +09:00
parent a9a2b93341
commit ae45cf32a7
6 changed files with 42 additions and 29 deletions
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21
src/net/torvald/terrarum/Terrarum.kt
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@@ -432,9 +432,12 @@ fun main(args: Array<String>) {
Terrarum.main(args)
}
// I must say: What the fuck is wrong with you, Slick2D?!
///////////////////////////////////
// customised blending functions //
///////////////////////////////////
fun blendMul() {
// I must say: What the fuck is wrong with you, Slick2D? Your built-it blending is just fucking wrong.
GL11.glEnable(GL11.GL_BLEND)
GL11.glColorMask(true, true, true, true)
GL11.glBlendFunc(GL11.GL_DST_COLOR, GL11.GL_ONE_MINUS_SRC_ALPHA)
@@ -445,13 +448,27 @@ fun blendNormal() {
GL11.glColorMask(true, true, true, true)
//GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA)
// TODO seems working as intended (no more whitened-out semitransparent colour), but needs further investigation
// semitransparent textures working as intended with this,
// but needs further investigation in the case of:
// TODO blend semitransparent over semitransparent
GL14.glBlendFuncSeparate(
GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA, // blend func for RGB channels
GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA // blend func for alpha channels
)
}
fun blendLightenOnly() {
GL11.glEnable(GL11.GL_BLEND)
GL14.glBlendFuncSeparate(
GL11.GL_ONE, GL11.GL_ONE, // blend func for RGB channels
GL11.GL_ONE, GL11.GL_ONE_MINUS_SRC_ALPHA // blend func for alpha channels
)
GL20.glBlendEquationSeparate(
GL14.GL_MAX,
GL14.GL_FUNC_ADD
)
}
fun blendAlphaMap() {
GL11.glDisable(GL11.GL_BLEND)
GL11.glColorMask(false, false, false, true)