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Multiple blendmodes (#1324)

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Co-authored-by: max <max.cedercreutz@cetopo.com>
This commit is contained in:
cedemax
2020-09-01 21:33:49 +03:00
committed by GitHub
parent dcbe481a28
commit bfafb80cde
2 changed files with 31 additions and 13 deletions
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39
src/rlgl.h
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@@ -589,6 +589,7 @@ RLAPI Texture2D GenTextureBRDF(Shader shader, int size); // Gen
RLAPI void BeginShaderMode(Shader shader); // Begin custom shader drawing
RLAPI void EndShaderMode(void); // End custom shader drawing (use default shader)
RLAPI void BeginBlendMode(int mode); // Begin blending mode (alpha, additive, multiplied)
RLAPI void BeginBlendModeEx(int sFactor, int dFactor, int equation); // Begin blending mode (full options)
RLAPI void EndBlendMode(void); // End blending mode (reset to default: alpha blending)
// VR control functions
@@ -3608,26 +3609,40 @@ Texture2D GenTextureBRDF(Shader shader, int size)
return brdf;
}
void BeginBlendModeEx(int sFactor, int dFactor, int equation)
{
static int glSFactor = 0; // Track current blending mode
static int glDFactor = 0; // Track current blending mode
static int glEquation = 0; // Track current blending mode
if (glSFactor != sFactor || glDFactor != dFactor || glEquation != equation) {
rlglDraw();
glBlendFunc(sFactor, dFactor);
glBlendEquation(equation);
glSFactor = sFactor;
glDFactor = dFactor;
glEquation = equation;
}
}
// Begin blending mode (alpha, additive, multiplied)
// NOTE: Only 3 blending modes supported, default blend mode is alpha
void BeginBlendMode(int mode)
{
static int blendMode = 0; // Track current blending mode
if ((blendMode != mode) && (mode < 4))
if (mode < 5)
{
rlglDraw();
switch (mode)
{
case BLEND_ALPHA: glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); break;
case BLEND_ADDITIVE: glBlendFunc(GL_SRC_ALPHA, GL_ONE); break;
case BLEND_MULTIPLIED: glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA); break;
case BLEND_ADD_COLORS: glBlendFunc(GL_ONE, GL_ONE); break;
default: break;
case BLEND_ALPHA: BeginBlendModeEx(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_FUNC_ADD); break;
case BLEND_ADDITIVE: BeginBlendModeEx(GL_SRC_ALPHA, GL_ONE, GL_FUNC_ADD); break;
case BLEND_MULTIPLIED: BeginBlendModeEx(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA, GL_FUNC_ADD); break;
case BLEND_ADD_COLORS: BeginBlendModeEx(GL_ONE, GL_ONE, GL_FUNC_ADD); break;
case BLEND_SUBTRACT_COLORS: BeginBlendModeEx(GL_ONE, GL_ONE, GL_FUNC_SUBTRACT); break;
default: break;
}
blendMode = mode;
}
}