diff options
Diffstat (limited to 'src/mesa/state_tracker/st_cb_viewport.c')
-rw-r--r-- | src/mesa/state_tracker/st_cb_viewport.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_viewport.c b/src/mesa/state_tracker/st_cb_viewport.c new file mode 100644 index 0000000000..d10b0b2531 --- /dev/null +++ b/src/mesa/state_tracker/st_cb_viewport.c @@ -0,0 +1,73 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + +#include "main/glheader.h" +#include "st_context.h" +#include "st_cb_viewport.h" + +#include "pipe/p_context.h" +#include "pipe/p_state.h" +#include "pipe/p_defines.h" +#include "util/u_atomic.h" +#include "util/u_debug.h" + +/** + * Cast wrapper to convert a GLframebuffer to an st_framebuffer. + * Return NULL if the GLframebuffer is a user-created framebuffer. + * We'll only return non-null for window system framebuffers. + * Note that this function may fail. + */ +static INLINE struct st_framebuffer * +st_ws_framebuffer(GLframebuffer *fb) +{ + /* FBO cannot be casted. See st_new_framebuffer */ + return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL); +} + +static void st_viewport(GLcontext * ctx, GLint x, GLint y, + GLsizei width, GLsizei height) +{ + struct st_context *st = ctx->st; + struct st_framebuffer *stdraw; + struct st_framebuffer *stread; + + if (!st->invalidate_on_gl_viewport) + return; + + stdraw = st_ws_framebuffer(st->ctx->DrawBuffer); + stread = st_ws_framebuffer(st->ctx->ReadBuffer); + + if (stdraw) + p_atomic_set(&stdraw->revalidate, TRUE); + if (stread && stread != stdraw) + p_atomic_set(&stread->revalidate, TRUE); +} + +void st_init_viewport_functions(struct dd_function_table *functions) +{ + functions->Viewport = st_viewport; +} |