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| author | Simon Robertshaw <simon@hardwired.org.uk> | 2011-10-29 12:46:14 (GMT) |
|---|---|---|
| committer | Simon Robertshaw <simon@hardwired.org.uk> | 2011-10-29 12:46:14 (GMT) |
| commit | 52fd083db4c3e3b7ef7e657f4fc4d8dd87c6c421 (patch) | |
| tree | 953314a645bee55fe244788472868d4b8e312f11 /src | |
| parent | a2d1ed0bac93c91dc044d4b55bcaa96dbf121e69 (diff) | |
| download | powder-52fd083db4c3e3b7ef7e657f4fc4d8dd87c6c421.zip powder-52fd083db4c3e3b7ef7e657f4fc4d8dd87c6c421.tar.gz | |
Persistent display for OpenGL
Diffstat (limited to 'src')
| -rw-r--r-- | src/graphics.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/graphics.c b/src/graphics.c index 1a741cf..4637eaa 100644 --- a/src/graphics.c +++ b/src/graphics.c @@ -358,7 +358,8 @@ void clearScreen(float alpha) } else { - glColor4f(0.0f, 0.0f, 0.0f, alpha); + glBlendEquation(GL_FUNC_REVERSE_SUBTRACT); + glColor4f(1.0f, 1.0f, 1.0f, alpha); glBindFramebuffer(GL_DRAW_FRAMEBUFFER, partsFbo); glBegin(GL_QUADS); glVertex2f(0, 0); @@ -367,6 +368,7 @@ void clearScreen(float alpha) glVertex2f(0, YRES); glEnd(); glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); + glBlendEquation(GL_FUNC_ADD); } glClearColor(0.0f, 0.0f, 0.0f, 1.0f); glClear(GL_COLOR_BUFFER_BIT); |