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/************************************************************************** |
* |
* Copyright 2009-2010 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 VMWARE 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. |
* |
**************************************************************************/ |
|
/** |
* @file |
* Framebuffer utility functions. |
* |
* @author Brian Paul |
*/ |
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|
#include "pipe/p_screen.h" |
#include "pipe/p_state.h" |
#include "pipe/p_defines.h" |
#include "util/u_inlines.h" |
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#include "util/u_memory.h" |
#include "util/u_framebuffer.h" |
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/** |
* Compare pipe_framebuffer_state objects. |
* \return TRUE if same, FALSE if different |
*/ |
boolean |
util_framebuffer_state_equal(const struct pipe_framebuffer_state *dst, |
const struct pipe_framebuffer_state *src) |
{ |
unsigned i; |
|
if (dst->width != src->width || |
dst->height != src->height) |
return FALSE; |
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for (i = 0; i < Elements(src->cbufs); i++) { |
if (dst->cbufs[i] != src->cbufs[i]) { |
return FALSE; |
} |
} |
|
if (dst->nr_cbufs != src->nr_cbufs) { |
return FALSE; |
} |
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if (dst->zsbuf != src->zsbuf) { |
return FALSE; |
} |
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return TRUE; |
} |
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/** |
* Copy framebuffer state from src to dst, updating refcounts. |
*/ |
void |
util_copy_framebuffer_state(struct pipe_framebuffer_state *dst, |
const struct pipe_framebuffer_state *src) |
{ |
unsigned i; |
|
dst->width = src->width; |
dst->height = src->height; |
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for (i = 0; i < src->nr_cbufs; i++) |
pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]); |
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for (i = src->nr_cbufs; i < dst->nr_cbufs; i++) |
pipe_surface_reference(&dst->cbufs[i], NULL); |
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dst->nr_cbufs = src->nr_cbufs; |
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pipe_surface_reference(&dst->zsbuf, src->zsbuf); |
} |
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void |
util_unreference_framebuffer_state(struct pipe_framebuffer_state *fb) |
{ |
unsigned i; |
|
for (i = 0; i < fb->nr_cbufs; i++) { |
pipe_surface_reference(&fb->cbufs[i], NULL); |
} |
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pipe_surface_reference(&fb->zsbuf, NULL); |
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fb->width = fb->height = 0; |
fb->nr_cbufs = 0; |
} |
|
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/* Where multiple sizes are allowed for framebuffer surfaces, find the |
* minimum width and height of all bound surfaces. |
*/ |
boolean |
util_framebuffer_min_size(const struct pipe_framebuffer_state *fb, |
unsigned *width, |
unsigned *height) |
{ |
unsigned w = ~0; |
unsigned h = ~0; |
unsigned i; |
|
for (i = 0; i < fb->nr_cbufs; i++) { |
w = MIN2(w, fb->cbufs[i]->width); |
h = MIN2(h, fb->cbufs[i]->height); |
} |
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if (fb->zsbuf) { |
w = MIN2(w, fb->zsbuf->width); |
h = MIN2(h, fb->zsbuf->height); |
} |
|
if (w == ~0) { |
*width = 0; |
*height = 0; |
return FALSE; |
} |
else { |
*width = w; |
*height = h; |
return TRUE; |
} |
} |