diff options
| -rw-r--r-- | src/mesa/drivers/x11/xm_api.c | 12 | ||||
| -rw-r--r-- | src/mesa/drivers/x11/xmesaP.h | 1 | ||||
| -rw-r--r-- | src/mesa/main/renderbuffer.c | 32 | ||||
| -rw-r--r-- | src/mesa/main/renderbuffer.h | 3 |
4 files changed, 43 insertions, 5 deletions
diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c index b513dc8d40..24b19d8eb5 100644 --- a/src/mesa/drivers/x11/xm_api.c +++ b/src/mesa/drivers/x11/xm_api.c @@ -363,7 +363,6 @@ static XMesaBuffer create_xmesa_buffer(XMesaDrawable d, BufferType type, XMesaVisual vis, XMesaColormap cmap) { - GLboolean swAlpha; XMesaBuffer b; ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER); @@ -421,10 +420,10 @@ create_xmesa_buffer(XMesaDrawable d, BufferType type, /* Visual has alpha, but pixel format doesn't support it. * We'll use an alpha renderbuffer wrapper. */ - swAlpha = GL_TRUE; + b->swAlpha = GL_TRUE; } else { - swAlpha = GL_FALSE; + b->swAlpha = GL_FALSE; } /* @@ -435,9 +434,9 @@ create_xmesa_buffer(XMesaDrawable d, BufferType type, vis->mesa_visual.haveDepthBuffer, vis->mesa_visual.haveStencilBuffer, vis->mesa_visual.haveAccumBuffer, - swAlpha, + b->swAlpha, vis->mesa_visual.numAuxBuffers > 0 ); - + /* insert buffer into linked list */ b->Next = XMesaBufferList; XMesaBufferList = b; @@ -2211,6 +2210,9 @@ void XMesaSwapBuffers( XMesaBuffer b ) ); /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/ } + + if (b->swAlpha) + _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer); } #if !defined(XFree86Server) XSync( b->xm_visual->display, False ); diff --git a/src/mesa/drivers/x11/xmesaP.h b/src/mesa/drivers/x11/xmesaP.h index 5516031ffe..85cb6b6636 100644 --- a/src/mesa/drivers/x11/xmesaP.h +++ b/src/mesa/drivers/x11/xmesaP.h @@ -224,6 +224,7 @@ struct xmesa_buffer { GLint db_mode; /* 0 = single buffered */ /* BACK_PIXMAP = use Pixmap for back buffer */ /* BACK_XIMAGE = use XImage for back buffer */ + GLboolean swAlpha; GLuint shm; /* X Shared Memory extension status: */ /* 0 = not available */ diff --git a/src/mesa/main/renderbuffer.c b/src/mesa/main/renderbuffer.c index e387c42c34..ded0063c73 100644 --- a/src/mesa/main/renderbuffer.c +++ b/src/mesa/main/renderbuffer.c @@ -1435,6 +1435,17 @@ put_mono_values_alpha8(GLcontext *ctx, struct gl_renderbuffer *arb, } +static void +copy_buffer_alpha8(struct gl_renderbuffer* dst, struct gl_renderbuffer* src) +{ + ASSERT(dst->_ActualFormat == GL_ALPHA8); + ASSERT(src->_ActualFormat == GL_ALPHA8); + ASSERT(dst->Width == src->Width); + ASSERT(dst->Height == src->Height); + + _mesa_memcpy(dst->Data, src->Data, dst->Width * dst->Height * sizeof(GLubyte)); +} + /**********************************************************************/ /**********************************************************************/ @@ -1766,6 +1777,27 @@ _mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, /** + * For framebuffers that use a software alpha channel wrapper + * created by _mesa_add_alpha_renderbuffer or _mesa_add_soft_renderbuffers, + * copy the back buffer alpha channel into the front buffer alpha channel. + */ +void +_mesa_copy_soft_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb) +{ + if (fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer && + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer) + copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer, + fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer); + + + if (fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer && + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer) + copy_buffer_alpha8(fb->Attachment[BUFFER_FRONT_RIGHT].Renderbuffer, + fb->Attachment[BUFFER_BACK_RIGHT].Renderbuffer); +} + + +/** * Add a software-based depth renderbuffer to the given framebuffer. * This is a helper routine for device drivers when creating a * window system framebuffer (not a user-created render/framebuffer). diff --git a/src/mesa/main/renderbuffer.h b/src/mesa/main/renderbuffer.h index e1a0a55979..e5f1147b4a 100644 --- a/src/mesa/main/renderbuffer.h +++ b/src/mesa/main/renderbuffer.h @@ -64,6 +64,9 @@ _mesa_add_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb, GLboolean frontLeft, GLboolean backLeft, GLboolean frontRight, GLboolean backRight); +extern void +_mesa_copy_soft_alpha_renderbuffers(GLcontext *ctx, struct gl_framebuffer *fb); + extern GLboolean _mesa_add_depth_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, GLuint depthBits); |