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| 4358 | Serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2009-2010 VMware, Inc. All Rights Reserved. |
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| 4 | * |
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| 5 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 6 | * copy of this software and associated documentation files (the |
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| 7 | * "Software"), to deal in the Software without restriction, including |
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| 8 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 9 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 10 | * permit persons to whom the Software is furnished to do so, subject to |
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| 11 | * the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice (including the |
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| 14 | * next paragraph) shall be included in all copies or substantial portions |
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| 15 | * of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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| 20 | * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
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| 21 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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| 22 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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| 23 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 24 | * |
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| 25 | **************************************************************************/ |
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| 26 | |||
| 27 | /** |
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| 28 | * @file |
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| 29 | * Framebuffer utility functions. |
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| 30 | * |
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| 31 | * @author Brian Paul |
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| 32 | */ |
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| 33 | |||
| 34 | |||
| 35 | #include "pipe/p_screen.h" |
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| 36 | #include "pipe/p_state.h" |
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| 37 | #include "pipe/p_defines.h" |
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| 38 | #include "util/u_inlines.h" |
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| 39 | |||
| 40 | #include "util/u_memory.h" |
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| 41 | #include "util/u_framebuffer.h" |
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| 42 | |||
| 43 | |||
| 44 | /** |
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| 45 | * Compare pipe_framebuffer_state objects. |
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| 46 | * \return TRUE if same, FALSE if different |
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| 47 | */ |
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| 48 | boolean |
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| 49 | util_framebuffer_state_equal(const struct pipe_framebuffer_state *dst, |
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| 50 | const struct pipe_framebuffer_state *src) |
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| 51 | { |
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| 52 | unsigned i; |
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| 53 | |||
| 54 | if (dst->width != src->width || |
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| 55 | dst->height != src->height) |
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| 56 | return FALSE; |
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| 57 | |||
| 58 | for (i = 0; i < Elements(src->cbufs); i++) { |
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| 59 | if (dst->cbufs[i] != src->cbufs[i]) { |
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| 60 | return FALSE; |
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| 61 | } |
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| 62 | } |
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| 63 | |||
| 64 | if (dst->nr_cbufs != src->nr_cbufs) { |
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| 65 | return FALSE; |
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| 66 | } |
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| 67 | |||
| 68 | if (dst->zsbuf != src->zsbuf) { |
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| 69 | return FALSE; |
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| 70 | } |
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| 71 | |||
| 72 | return TRUE; |
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| 73 | } |
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| 74 | |||
| 75 | |||
| 76 | /** |
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| 77 | * Copy framebuffer state from src to dst, updating refcounts. |
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| 78 | */ |
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| 79 | void |
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| 80 | util_copy_framebuffer_state(struct pipe_framebuffer_state *dst, |
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| 81 | const struct pipe_framebuffer_state *src) |
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| 82 | { |
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| 83 | unsigned i; |
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| 84 | |||
| 85 | dst->width = src->width; |
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| 86 | dst->height = src->height; |
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| 87 | |||
| 88 | for (i = 0; i < src->nr_cbufs; i++) |
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| 89 | pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]); |
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| 90 | |||
| 91 | for (i = src->nr_cbufs; i < dst->nr_cbufs; i++) |
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| 92 | pipe_surface_reference(&dst->cbufs[i], NULL); |
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| 93 | |||
| 94 | dst->nr_cbufs = src->nr_cbufs; |
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| 95 | |||
| 96 | pipe_surface_reference(&dst->zsbuf, src->zsbuf); |
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| 97 | } |
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| 98 | |||
| 99 | |||
| 100 | void |
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| 101 | util_unreference_framebuffer_state(struct pipe_framebuffer_state *fb) |
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| 102 | { |
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| 103 | unsigned i; |
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| 104 | |||
| 105 | for (i = 0; i < fb->nr_cbufs; i++) { |
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| 106 | pipe_surface_reference(&fb->cbufs[i], NULL); |
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| 107 | } |
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| 108 | |||
| 109 | pipe_surface_reference(&fb->zsbuf, NULL); |
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| 110 | |||
| 111 | fb->width = fb->height = 0; |
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| 112 | fb->nr_cbufs = 0; |
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| 113 | } |
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| 114 | |||
| 115 | |||
| 116 | /* Where multiple sizes are allowed for framebuffer surfaces, find the |
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| 117 | * minimum width and height of all bound surfaces. |
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| 118 | */ |
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| 119 | boolean |
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| 120 | util_framebuffer_min_size(const struct pipe_framebuffer_state *fb, |
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| 121 | unsigned *width, |
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| 122 | unsigned *height) |
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| 123 | { |
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| 124 | unsigned w = ~0; |
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| 125 | unsigned h = ~0; |
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| 126 | unsigned i; |
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| 127 | |||
| 128 | for (i = 0; i < fb->nr_cbufs; i++) { |
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| 129 | w = MIN2(w, fb->cbufs[i]->width); |
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| 130 | h = MIN2(h, fb->cbufs[i]->height); |
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| 131 | } |
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| 132 | |||
| 133 | if (fb->zsbuf) { |
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| 134 | w = MIN2(w, fb->zsbuf->width); |
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| 135 | h = MIN2(h, fb->zsbuf->height); |
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| 136 | } |
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| 137 | |||
| 138 | if (w == ~0) { |
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| 139 | *width = 0; |
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| 140 | *height = 0; |
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| 141 | return FALSE; |
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| 142 | } |
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| 143 | else { |
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| 144 | *width = w; |
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| 145 | *height = h; |
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| 146 | return TRUE; |
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| 147 | } |
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| 148 | } |