src/gallium/drivers/i915/i915_state_static.c

   1 /**************************************************************************
   2  *
   3  * Copyright © 2010 Jakob Bornecrantz
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22  * DEALINGS IN THE SOFTWARE.
  23  *
  24  **************************************************************************/
  25
  26
  27 #include "i915_reg.h"
  28 #include "i915_context.h"
  29 #include "i915_state.h"
  30 #include "i915_resource.h"
  31 #include "i915_screen.h"
  32
  33
  34
  35 /***********************************************************************
  36  * Update framebuffer state
  37  */
  38 static unsigned translate_format(enum pipe_format format)
  39 {
  40    switch (format) {
  41    case PIPE_FORMAT_B8G8R8A8_UNORM:
  42       return COLOR_BUF_ARGB8888;
  43    case PIPE_FORMAT_B5G6R5_UNORM:
  44       return COLOR_BUF_RGB565;
  45    case PIPE_FORMAT_R8G8B8A8_UNORM:
  46       return COLOR_BUF_ARGB8888;
  47    case PIPE_FORMAT_L8_UNORM:
  48    case PIPE_FORMAT_A8_UNORM:
  49    case PIPE_FORMAT_I8_UNORM:
  50       return COLOR_BUF_8BIT;
  51    default:
  52       assert(0);
  53       return 0;
  54    }
  55 }
  56
  57 static unsigned translate_depth_format(enum pipe_format zformat)
  58 {
  59    switch (zformat) {
  60    case PIPE_FORMAT_Z24X8_UNORM:
  61    case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
  62       return DEPTH_FRMT_24_FIXED_8_OTHER;
  63    case PIPE_FORMAT_Z16_UNORM:
  64       return DEPTH_FRMT_16_FIXED;
  65    default:
  66       assert(0);
  67       return 0;
  68    }
  69 }
  70
  71 static inline uint32_t
  72 buf_3d_tiling_bits(enum i915_winsys_buffer_tile tiling)
  73 {
  74    uint32_t tiling_bits = 0;
  75
  76    switch (tiling) {
  77    case I915_TILE_Y:
  78       tiling_bits |= BUF_3D_TILE_WALK_Y;
  79    case I915_TILE_X:
  80       tiling_bits |= BUF_3D_TILED_SURFACE;
  81    case I915_TILE_NONE:
  82       break;
  83    }
  84
  85    return tiling_bits;
  86 }
  87
  88 static void update_framebuffer(struct i915_context *i915)
  89 {
  90    struct pipe_surface *cbuf_surface = i915->framebuffer.cbufs[0];
  91    struct pipe_surface *depth_surface = i915->framebuffer.zsbuf;
  92    unsigned x, y;
  93    int layer;
  94    uint32_t draw_offset, draw_size;
  95
  96    if (cbuf_surface) {
  97       struct i915_texture *tex = i915_texture(cbuf_surface->texture);
  98       assert(tex);
  99
 100       i915->current.cbuf_bo = tex->buffer;
 101       i915->current.cbuf_flags = BUF_3D_ID_COLOR_BACK |
 102                                  BUF_3D_PITCH(tex->stride) |  /* pitch in bytes */
 103                                  buf_3d_tiling_bits(tex->tiling);
 104
 105       layer = cbuf_surface->u.tex.first_layer;
 106
 107       x = tex->image_offset[cbuf_surface->u.tex.level][layer].nblocksx;
 108       y = tex->image_offset[cbuf_surface->u.tex.level][layer].nblocksy;
 109    } else {
 110       i915->current.cbuf_bo = NULL;
 111       x = y = 0;
 112    }
 113    i915->static_dirty |= I915_DST_BUF_COLOR;
 114
 115    /* What happens if no zbuf??
 116     */
 117    if (depth_surface) {
 118       struct i915_texture *tex = i915_texture(depth_surface->texture);
 119       unsigned offset = i915_texture_offset(tex, depth_surface->u.tex.level,
 120                                             depth_surface->u.tex.first_layer);
 121       assert(tex);
 122       assert(offset == 0);
 123
 124       i915->current.depth_bo = tex->buffer;
 125       i915->current.depth_flags = BUF_3D_ID_DEPTH |
 126                                   BUF_3D_PITCH(tex->stride) |  /* pitch in bytes */
 127                                   buf_3d_tiling_bits(tex->tiling);
 128    } else
 129       i915->current.depth_bo = NULL;
 130    i915->static_dirty |= I915_DST_BUF_DEPTH;
 131
 132    /* drawing rect calculations */
 133    draw_offset = x | (y << 16);
 134    draw_size = (i915->framebuffer.width - 1 + x) |
 135                ((i915->framebuffer.height - 1 + y) << 16);
 136    if (i915->current.draw_offset != draw_offset) {
 137       i915->current.draw_offset = draw_offset;
 138       i915_set_flush_dirty(i915, I915_PIPELINE_FLUSH);
 139       i915->static_dirty |= I915_DST_RECT;
 140    }
 141    if (i915->current.draw_size != draw_size) {
 142       i915->current.draw_size = draw_size;
 143       i915->static_dirty |= I915_DST_RECT;
 144    }
 145
 146    /* we also send a new program to make sure the fixup for RGBA surfaces happens */
 147    i915->hardware_dirty |= I915_HW_STATIC | I915_HW_PROGRAM;
 148
 149    /* flush the cache in case we sample from the old renderbuffers */
 150    i915_set_flush_dirty(i915, I915_FLUSH_CACHE);
 151 }
 152
 153 struct i915_tracked_state i915_hw_framebuffer = {
 154    "framebuffer",
 155    update_framebuffer,
 156    I915_NEW_FRAMEBUFFER
 157 };
 158
 159 static void update_dst_buf_vars(struct i915_context *i915)
 160 {
 161    struct pipe_surface *cbuf_surface = i915->framebuffer.cbufs[0];
 162    struct pipe_surface *depth_surface = i915->framebuffer.zsbuf;
 163    uint32_t dst_buf_vars, cformat, zformat;
 164    uint32_t early_z = 0;
 165
 166    if (cbuf_surface)
 167       cformat = cbuf_surface->format;
 168    else
 169       cformat = PIPE_FORMAT_B8G8R8A8_UNORM; /* arbitrary */
 170    cformat = translate_format(cformat);
 171
 172    if (depth_surface) {
 173       struct i915_texture *tex = i915_texture(depth_surface->texture);
 174       struct i915_screen *is = i915_screen(i915->base.screen);
 175
 176       zformat = translate_depth_format(depth_surface->format);
 177
 178       if (is->is_i945 && tex->tiling != I915_TILE_NONE
 179             && !i915->fs->info.writes_z)
 180          early_z = CLASSIC_EARLY_DEPTH;
 181    } else
 182       zformat = 0;
 183
 184    dst_buf_vars = DSTORG_HORT_BIAS(0x8) | /* .5 */
 185                   DSTORG_VERT_BIAS(0x8) | /* .5 */
 186                   LOD_PRECLAMP_OGL |
 187                   TEX_DEFAULT_COLOR_OGL |
 188                   cformat |
 189                   zformat |
 190                   early_z;
 191
 192    if (i915->current.dst_buf_vars != dst_buf_vars) {
 193       if (early_z != (i915->current.dst_buf_vars & CLASSIC_EARLY_DEPTH))
 194          i915_set_flush_dirty(i915, I915_PIPELINE_FLUSH);
 195
 196       i915->current.dst_buf_vars = dst_buf_vars;
 197       i915->static_dirty |= I915_DST_VARS;
 198       i915->hardware_dirty |= I915_HW_STATIC;
 199    }
 200 }
 201
 202 struct i915_tracked_state i915_hw_dst_buf_vars = {
 203    "dst buf vars",
 204    update_dst_buf_vars,
 205    I915_NEW_FRAMEBUFFER | I915_NEW_FS
 206 };