src/gallium/drivers/swr/swr_clear.cpp

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   2  * Copyright (C) 2015 Intel Corporation.   All Rights Reserved.
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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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  13  * Software.
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  21  * IN THE SOFTWARE.
  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    SWR_RECT clear_rect;
  72    /* If enabled, clear to scissor; otherwise clear full surface */
  73    if (ctx->rasterizer && ctx->rasterizer->scissor) {
  74       clear_rect = ctx->swr_scissors[0];
  75    } else {
  76       clear_rect = {0, 0, (int32_t)fb->width, (int32_t)fb->height};
  77    }
  78
  79    for (unsigned i = 0; i < layers; ++i) {
  80       swr_update_draw_context(ctx);
  81       ctx->api.pfnSwrClearRenderTarget(ctx->swrContext, clearMask, i,
  82                                        color->f, depth, stencil,
  83                                        clear_rect);
  84
  85       // Mask out the attachments that are out of layers.
  86       if (fb->zsbuf &&
  87           (fb->zsbuf->u.tex.last_layer <= fb->zsbuf->u.tex.first_layer + i))
  88          clearMask &= ~(SWR_ATTACHMENT_DEPTH_BIT | SWR_ATTACHMENT_STENCIL_BIT);
  89       for (unsigned c = 0; c < fb->nr_cbufs; ++c) {
  90          const struct pipe_surface *sf = fb->cbufs[c];
  91          if (sf && (sf->u.tex.last_layer <= sf->u.tex.first_layer + i))
  92             clearMask &= ~(SWR_ATTACHMENT_COLOR0_BIT << c);
  93       }
  94    }
  95 }
  96
  97
  98 #if 0 // XXX, these don't get called. how to get these called?  Do we need
  99       // them?  Docs?
 100 static void
 101 swr_clear_render_target(struct pipe_context *pipe, struct pipe_surface *ps,
 102                         const union pipe_color_union *color,
 103                         unsigned x, unsigned y, unsigned w, unsigned h,
 104                         bool render_condition_enabled)
 105 {
 106    struct swr_context *ctx = swr_context(pipe);
 107    fprintf(stderr, "SWR swr_clear_render_target!\n");
 108
 109    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 110 }
 111
 112 static void
 113 swr_clear_depth_stencil(struct pipe_context *pipe, struct pipe_surface *ps,
 114                         unsigned buffers, double depth, unsigned stencil,
 115                         unsigned x, unsigned y, unsigned w, unsigned h,
 116                         bool render_condition_enabled)
 117 {
 118    struct swr_context *ctx = swr_context(pipe);
 119    fprintf(stderr, "SWR swr_clear_depth_stencil!\n");
 120
 121    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 122 }
 123
 124 static void
 125 swr_clear_buffer(struct pipe_context *pipe,
 126                  struct pipe_resource *res,
 127                  unsigned offset, unsigned size,
 128                  const void *data, int data_size)
 129 {
 130    fprintf(stderr, "SWR swr_clear_buffer!\n");
 131    struct swr_context *ctx = swr_context(pipe);
 132    struct swr_resource *buf = swr_resource(res);
 133    union pipe_color_union color;
 134    enum pipe_format dst_fmt;
 135    unsigned width, height, elements;
 136
 137    assert(res->target == PIPE_BUFFER);
 138    assert(buf);
 139    assert(size % data_size == 0);
 140
 141    SWR_SURFACE_STATE &swr_buffer = buf->swr;
 142
 143    ctx->dirty |= SWR_NEW_FRAMEBUFFER | SWR_NEW_SCISSOR;
 144 }
 145 #endif
 146
 147
 148 void
 149 swr_clear_init(struct pipe_context *pipe)
 150 {
 151    pipe->clear = swr_clear;
 152 #if 0 // XXX, these don't get called. how to get these called?  Do we need
 153       // them?  Docs?
 154    pipe->clear_render_target = swr_clear_render_target;
 155    pipe->clear_depth_stencil = swr_clear_depth_stencil;
 156    pipe->clear_buffer = swr_clear_buffer;
 157 #endif
 158 }