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Consolidate some internal graphics state definitions into a new renderstate file.

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--HG--
branch : minor
This commit is contained in:
Alex Szpakowski
2019-12-26 23:07:51 -05:00
parent f3b52f66fe
commit efa2bd7837
16 changed files with 577 additions and 385 deletions
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src/modules/graphics/opengl/Graphics.cpp
+44 -47
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@@ -54,6 +54,40 @@ namespace graphics
namespace opengl
{
static GLenum getGLBlendOperation(BlendOperation op)
{
switch (op)
{
case BLENDOP_ADD: return GL_FUNC_ADD;
case BLENDOP_SUBTRACT: return GL_FUNC_SUBTRACT;
case BLENDOP_REVERSE_SUBTRACT: return GL_FUNC_REVERSE_SUBTRACT;
case BLENDOP_MIN: return GL_MIN;
case BLENDOP_MAX: return GL_MAX;
case BLENDOP_MAX_ENUM: return 0;
}
return 0;
}
static GLenum getGLBlendFactor(BlendFactor factor)
{
switch (factor)
{
case BLENDFACTOR_ZERO: return GL_ZERO;
case BLENDFACTOR_ONE: return GL_ONE;
case BLENDFACTOR_SRC_COLOR: return GL_SRC_COLOR;
case BLENDFACTOR_ONE_MINUS_SRC_COLOR: return GL_ONE_MINUS_SRC_COLOR;
case BLENDFACTOR_SRC_ALPHA: return GL_SRC_ALPHA;
case BLENDFACTOR_ONE_MINUS_SRC_ALPHA: return GL_ONE_MINUS_SRC_ALPHA;
case BLENDFACTOR_DST_COLOR: return GL_DST_COLOR;
case BLENDFACTOR_ONE_MINUS_DST_COLOR: return GL_ONE_MINUS_DST_COLOR;
case BLENDFACTOR_DST_ALPHA: return GL_DST_ALPHA;
case BLENDFACTOR_ONE_MINUS_DST_ALPHA: return GL_ONE_MINUS_DST_ALPHA;
case BLENDFACTOR_SRC_ALPHA_SATURATED: return GL_SRC_ALPHA_SATURATE;
case BLENDFACTOR_MAX_ENUM: return 0;
}
return 0;
}
Graphics::Graphics()
: windowHasStencil(false)
, mainVAO(0)
@@ -1226,7 +1260,7 @@ void Graphics::setColor(Colorf c)
states.back().color = c;
}
void Graphics::setColorMask(ColorMask mask)
void Graphics::setColorMask(ColorChannelMask mask)
{
flushStreamDraws();
@@ -1253,7 +1287,7 @@ void Graphics::setBlendMode(BlendMode mode, BlendAlpha alphamode)
case BLEND_LIGHTEN:
case BLEND_DARKEN:
case BLEND_MULTIPLY:
getConstant(mode, modestr);
love::graphics::getConstant(mode, modestr);
throw love::Exception("The '%s' blend mode must be used with premultiplied alpha.", modestr);
break;
default:
@@ -1261,52 +1295,15 @@ void Graphics::setBlendMode(BlendMode mode, BlendAlpha alphamode)
}
}
GLenum func = GL_FUNC_ADD;
GLenum srcRGB = GL_ONE;
GLenum srcA = GL_ONE;
GLenum dstRGB = GL_ZERO;
GLenum dstA = GL_ZERO;
BlendState state = getBlendState(mode, alphamode);
GLenum opRGB = getGLBlendOperation(state.operationRGB);
GLenum opA = getGLBlendOperation(state.operationA);
GLenum srcRGB = getGLBlendFactor(state.srcFactorRGB);
GLenum srcA = getGLBlendFactor(state.srcFactorA);
GLenum dstRGB = getGLBlendFactor(state.dstFactorRGB);
GLenum dstA = getGLBlendFactor(state.dstFactorA);
switch (mode)
{
case BLEND_ALPHA:
srcRGB = srcA = GL_ONE;
dstRGB = dstA = GL_ONE_MINUS_SRC_ALPHA;
break;
case BLEND_MULTIPLY:
srcRGB = srcA = GL_DST_COLOR;
dstRGB = dstA = GL_ZERO;
break;
case BLEND_SUBTRACT:
func = GL_FUNC_REVERSE_SUBTRACT;
case BLEND_ADD:
srcRGB = GL_ONE;
srcA = GL_ZERO;
dstRGB = dstA = GL_ONE;
break;
case BLEND_LIGHTEN:
func = GL_MAX;
break;
case BLEND_DARKEN:
func = GL_MIN;
break;
case BLEND_SCREEN:
srcRGB = srcA = GL_ONE;
dstRGB = dstA = GL_ONE_MINUS_SRC_COLOR;
break;
case BLEND_REPLACE:
case BLEND_NONE:
default:
srcRGB = srcA = GL_ONE;
dstRGB = dstA = GL_ZERO;
break;
}
// We can only do alpha-multiplication when srcRGB would have been unmodified.
if (srcRGB == GL_ONE && alphamode == BLENDALPHA_MULTIPLY && mode != BLEND_NONE)
srcRGB = GL_SRC_ALPHA;
glBlendEquation(func);
glBlendEquationSeparate(opRGB, opA);
glBlendFuncSeparate(srcRGB, dstRGB, srcA, dstA);
states.back().blendMode = mode;