src/gallium/state_trackers/dri/common/dri1_helper.c

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   3  * Copyright 2009, VMware, Inc.
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  27 /*
  28  * Management of pipe objects (surface / pipe / fences) used by DRI1 and DRISW.
  29  *
  30  * Author: Keith Whitwell <keithw@vmware.com>
  31  * Author: Jakob Bornecrantz <wallbraker@gmail.com>
  32  */
  33
  34 #include "util/u_inlines.h"
  35 #include "pipe/p_context.h"
  36
  37 #include "dri_screen.h"
  38 #include "dri_context.h"
  39 #include "dri_drawable.h"
  40 #include "dri1_helper.h"
  41
  42 struct pipe_fence_handle *
  43 dri1_swap_fences_pop_front(struct dri_drawable *draw)
  44 {
  45    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
  46    struct pipe_fence_handle *fence = NULL;
  47
  48    if (draw->cur_fences >= draw->desired_fences) {
  49       screen->fence_reference(screen, &fence, draw->swap_fences[draw->tail]);
  50       screen->fence_reference(screen, &draw->swap_fences[draw->tail++], NULL);
  51       --draw->cur_fences;
  52       draw->tail &= DRI_SWAP_FENCES_MASK;
  53    }
  54    return fence;
  55 }
  56
  57 void
  58 dri1_swap_fences_push_back(struct dri_drawable *draw,
  59                            struct pipe_fence_handle *fence)
  60 {
  61    struct pipe_screen *screen = dri_screen(draw->sPriv)->pipe_screen;
  62
  63    if (!fence)
  64       return;
  65
  66    if (draw->cur_fences < DRI_SWAP_FENCES_MAX) {
  67       draw->cur_fences++;
  68       screen->fence_reference(screen, &draw->swap_fences[draw->head++],
  69                               fence);
  70       draw->head &= DRI_SWAP_FENCES_MASK;
  71    }
  72 }
  73
  74 void
  75 dri1_swap_fences_clear(struct dri_drawable *drawable)
  76 {
  77    struct pipe_screen *screen = dri_screen(drawable->sPriv)->pipe_screen;
  78    struct pipe_fence_handle *fence;
  79
  80    while (drawable->cur_fences) {
  81       fence = dri1_swap_fences_pop_front(drawable);
  82       screen->fence_reference(screen, &fence, NULL);
  83    }
  84 }
  85
  86 struct pipe_surface *
  87 dri1_get_pipe_surface(struct dri_drawable *drawable, struct pipe_resource *ptex)
  88 {
  89    struct pipe_screen *pipe_screen = dri_screen(drawable->sPriv)->pipe_screen;
  90    struct pipe_surface *psurf = drawable->dri1_surface;
  91
  92    if (!psurf || psurf->texture != ptex) {
  93       pipe_surface_reference(&drawable->dri1_surface, NULL);
  94
  95       drawable->dri1_surface = pipe_screen->get_tex_surface(pipe_screen,
  96             ptex, 0, 0, 0, PIPE_BIND_BLIT_SOURCE);
  97
  98       psurf = drawable->dri1_surface;
  99    }
 100
 101    return psurf;
 102 }
 103
 104 void
 105 dri1_destroy_pipe_surface(struct dri_drawable *drawable)
 106 {
 107    pipe_surface_reference(&drawable->dri1_surface, NULL);
 108 }
 109
 110 struct pipe_context *
 111 dri1_get_pipe_context(struct dri_screen *screen)
 112 {
 113    struct pipe_context *pipe = screen->dri1_pipe;
 114
 115    if (!pipe) {
 116       screen->dri1_pipe =
 117          screen->pipe_screen->context_create(screen->pipe_screen, NULL);
 118       pipe = screen->dri1_pipe;
 119    }
 120
 121    return pipe;
 122 }
 123
 124 void
 125 dri1_destroy_pipe_context(struct dri_screen *screen)
 126 {
 127    if (screen->dri1_pipe)
 128       screen->dri1_pipe->destroy(screen->dri1_pipe);
 129 }