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1901 | serge | 1 | /************************************************************************** |
2 | * |
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3 | * Copyright 2009 VMware, Inc. |
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4 | * All Rights Reserved. |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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7 | * copy of this software and associated documentation files (the |
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8 | * "Software"), to deal in the Software without restriction, including |
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9 | * without limitation the rights to use, copy, modify, merge, publish, |
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10 | * distribute, sub license, and/or sell copies of the Software, and to |
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11 | * permit persons to whom the Software is furnished to do so, subject to |
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12 | * the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice (including the |
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15 | * next paragraph) shall be included in all copies or substantial portions |
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16 | * of the Software. |
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17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
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21 | * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
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22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
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23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
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24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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25 | * |
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26 | **************************************************************************/ |
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27 | |||
28 | #include "main/glheader.h" |
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29 | #include "st_context.h" |
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30 | #include "st_cb_viewport.h" |
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31 | |||
32 | #include "pipe/p_state.h" |
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33 | #include "pipe/p_defines.h" |
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34 | #include "util/u_atomic.h" |
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35 | |||
36 | /** |
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37 | * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer. |
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38 | * Return NULL if the struct gl_framebuffer is a user-created framebuffer. |
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39 | * We'll only return non-null for window system framebuffers. |
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40 | * Note that this function may fail. |
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41 | */ |
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42 | static INLINE struct st_framebuffer * |
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43 | st_ws_framebuffer(struct gl_framebuffer *fb) |
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44 | { |
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45 | /* FBO cannot be casted. See st_new_framebuffer */ |
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46 | return (struct st_framebuffer *) ((fb && !fb->Name) ? fb : NULL); |
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47 | } |
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48 | |||
49 | static void st_viewport(struct gl_context * ctx, GLint x, GLint y, |
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50 | GLsizei width, GLsizei height) |
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51 | { |
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52 | struct st_context *st = ctx->st; |
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53 | struct st_framebuffer *stdraw; |
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54 | struct st_framebuffer *stread; |
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55 | |||
56 | if (!st->invalidate_on_gl_viewport) |
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57 | return; |
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58 | |||
59 | stdraw = st_ws_framebuffer(st->ctx->DrawBuffer); |
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60 | stread = st_ws_framebuffer(st->ctx->ReadBuffer); |
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61 | |||
62 | if (stdraw) |
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63 | p_atomic_set(&stdraw->revalidate, TRUE); |
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64 | if (stread && stread != stdraw) |
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65 | p_atomic_set(&stread->revalidate, TRUE); |
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66 | } |
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67 | |||
68 | void st_init_viewport_functions(struct dd_function_table *functions) |
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69 | { |
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70 | functions->Viewport = st_viewport; |
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71 | } |