src/gallium/drivers/swr/swr_clear.cpp

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   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
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  22  ***************************************************************************/
  23
  24 #include "swr_context.h"
  25 #include "swr_query.h"
  26
  27 static void
  28 swr_clear(struct pipe_context *pipe,
  29           unsigned buffers,
  30           const union pipe_color_union *color,
  31           double depth,
  32           unsigned stencil)
  33 {
  34    struct swr_context *ctx = swr_context(pipe);
  35    struct pipe_framebuffer_state *fb = &ctx->framebuffer;
  36
  37    UINT clearMask = 0;
  38    unsigned layers = 0;
  39
  40    if (!swr_check_render_cond(pipe))
  41       return;
  42
  43    swr_update_derived(pipe);
  44
  45    if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
  46       for (unsigned i = 0; i < fb->nr_cbufs; ++i)
  47          if (fb->cbufs[i] && (buffers & (PIPE_CLEAR_COLOR0 << i))) {
  48             clearMask |= (SWR_ATTACHMENT_COLOR0_BIT << i);
  49             layers = std::max(layers, fb->cbufs[i]->u.tex.last_layer -
  50                                       fb->cbufs[i]->u.tex.first_layer + 1u);
  51          }
  52    }
  53
  54    if (buffers & PIPE_CLEAR_DEPTH && fb->zsbuf) {
  55       clearMask |= SWR_ATTACHMENT_DEPTH_BIT;
  56       layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
  57                                 fb->zsbuf->u.tex.first_layer + 1u);
  58    }
  59
  60    if (buffers & PIPE_CLEAR_STENCIL && fb->zsbuf) {
  61       clearMask |= SWR_ATTACHMENT_STENCIL_BIT;
  62       layers = std::max(layers, fb->zsbuf->u.tex.last_layer -
  63                                 fb->zsbuf->u.tex.first_layer + 1u);
  64    }
  65
  66 #if 0 // XXX HACK, override clear color alpha. On ubuntu, clears are
  67       // transparent.
  68    ((union pipe_color_union *)color)->f[3] = 1.0; /* cast off your const'd-ness */
  69 #endif
  70
  71    for (unsigned i = 0; i < layers; ++i) {
  72       swr_update_draw_context(ctx);
  73       SwrClearRenderTarget(ctx->swrContext, clearMask, i,
  74                            color->f, depth, stencil,
  75                            ctx->swr_scissor);
  76
  77       // Mask out the attachments that are out of layers.
  78       if (fb->zsbuf &&
  79           (fb->zsbuf->u.tex.last_layer <= fb->zsbuf->u.tex.first_layer + i))
  80          clearMask &= ~(SWR_ATTACHMENT_DEPTH_BIT | SWR_ATTACHMENT_STENCIL_BIT);
  81       for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
  82          const struct pipe_surface *sf = fb->cbufs[c];
  83          if (sf && (sf->u.tex.last_layer <= sf->u.tex.first_layer + i))
  84             clearMask &= ~(SWR_ATTACHMENT_COLOR0_BIT << c);
  85       }
  86    }
  87 }
  88
  89
  90 #if 0 // XXX, these don't get called. how to get these called?  Do we need
  91       // them?  Docs?
  92 static void
  93 swr_clear_render_target(struct pipe_context *pipe, struct pipe_surface *ps,
  94                         const union pipe_color_union *color,
  95                         unsigned x, unsigned y, unsigned w, unsigned h,
  96                         bool render_condition_enabled)
  97 {
  98    struct swr_context *ctx = swr_context(pipe);
  99    fprintf(stderr, "SWR swr_clear_render_target!\n");
 100
 101    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 102 }
 103
 104 static void
 105 swr_clear_depth_stencil(struct pipe_context *pipe, struct pipe_surface *ps,
 106                         unsigned buffers, double depth, unsigned stencil,
 107                         unsigned x, unsigned y, unsigned w, unsigned h,
 108                         bool render_condition_enabled)
 109 {
 110    struct swr_context *ctx = swr_context(pipe);
 111    fprintf(stderr, "SWR swr_clear_depth_stencil!\n");
 112
 113    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 114 }
 115
 116 static void
 117 swr_clear_buffer(struct pipe_context *pipe,
 118                  struct pipe_resource *res,
 119                  unsigned offset, unsigned size,
 120                  const void *data, int data_size)
 121 {
 122    fprintf(stderr, "SWR swr_clear_buffer!\n");
 123    struct swr_context *ctx = swr_context(pipe);
 124    struct swr_resource *buf = swr_resource(res);
 125    union pipe_color_union color;
 126    enum pipe_format dst_fmt;
 127    unsigned width, height, elements;
 128
 129    assert(res->target == PIPE_BUFFER);
 130    assert(buf);
 131    assert(size % data_size == 0);
 132
 133    SWR_SURFACE_STATE &swr_buffer = buf->swr;
 134
 135    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 136 }
 137 #endif
 138
 139
 140 void
 141 swr_clear_init(struct pipe_context *pipe)
 142 {
 143    pipe->clear = swr_clear;
 144 #if 0 // XXX, these don't get called. how to get these called?  Do we need
 145       // them?  Docs?
 146    pipe->clear_render_target = swr_clear_render_target;
 147    pipe->clear_depth_stencil = swr_clear_depth_stencil;
 148    pipe->clear_buffer = swr_clear_buffer;
 149 #endif
 150 }