diff options
Diffstat (limited to 'src/mesa/main/renderbuffer.c')
| -rw-r--r-- | src/mesa/main/renderbuffer.c | 32 |
1 files changed, 32 insertions, 0 deletions
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). |