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Add love.graphics.setBlendState, which sets the lower level blend operation and factor values which higher level blend modes are based on.

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--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2019-12-27 09:57:42 -05:00
parent efa2bd7837
commit b41f1316fa
7 changed files with 226 additions and 86 deletions
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src/modules/graphics/Graphics.cpp
+22 -5
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@@ -376,7 +376,7 @@ void Graphics::restoreState(const DisplayState &s)
setColor(s.color);
setBackgroundColor(s.backgroundColor);
setBlendMode(s.blendMode, s.blendAlphaMode);
setBlendState(s.blend);
setLineWidth(s.lineWidth);
setLineStyle(s.lineStyle);
@@ -415,8 +415,8 @@ void Graphics::restoreStateChecked(const DisplayState &s)
setBackgroundColor(s.backgroundColor);
if (s.blendMode != cur.blendMode || s.blendAlphaMode != cur.blendAlphaMode)
setBlendMode(s.blendMode, s.blendAlphaMode);
if (!(s.blend == cur.blend))
setBlendState(s.blend);
// These are just simple assignments.
setLineWidth(s.lineWidth);
@@ -901,10 +901,26 @@ ColorChannelMask Graphics::getColorMask() const
return states.back().colorMask;
}
void Graphics::setBlendMode(BlendMode mode, BlendAlpha alphamode)
{
if (alphamode == BLENDALPHA_MULTIPLY && !isAlphaMultiplyBlendSupported(mode))
{
const char *modestr = "unknown";
love::graphics::getConstant(mode, modestr);
throw love::Exception("The '%s' blend mode must be used with premultiplied alpha.", modestr);
}
setBlendState(computeBlendState(mode, alphamode));
}
BlendMode Graphics::getBlendMode(BlendAlpha &alphamode) const
{
alphamode = states.back().blendAlphaMode;
return states.back().blendMode;
return computeBlendMode(states.back().blend, alphamode);
}
const BlendState &Graphics::getBlendState() const
{
return states.back().blend;
}
void Graphics::setDefaultFilter(const Texture::Filter &f)
@@ -1881,6 +1897,7 @@ StringMap<Graphics::Feature, Graphics::FEATURE_MAX_ENUM>::Entry Graphics::featur
{
{ "multicanvasformats", FEATURE_MULTI_CANVAS_FORMATS },
{ "clampzero", FEATURE_CLAMP_ZERO },
{ "blendminmax", FEATURE_BLENDMINMAX },
{ "lighten", FEATURE_LIGHTEN },
{ "fullnpot", FEATURE_FULL_NPOT },
{ "pixelshaderhighp", FEATURE_PIXEL_SHADER_HIGHP },