src/gallium/drivers/r300/r300_blit.c

   1 /*
   2  * Copyright 2009 Marek Olšák <maraeo@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "r300_context.h"
  24 #include "r300_texture.h"
  25
  26 #include "util/u_format.h"
  27
  28 enum r300_blitter_op /* bitmask */
  29 {
  30     R300_CLEAR         = 1,
  31     R300_CLEAR_SURFACE = 2,
  32     R300_COPY          = 4
  33 };
  34
  35 static void r300_blitter_begin(struct r300_context* r300, enum r300_blitter_op op)
  36 {
  37     if (r300->query_current) {
  38         r300->blitter_saved_query = r300->query_current;
  39         r300_stop_query(r300);
  40     }
  41
  42     /* Yeah we have to save all those states to ensure the blitter operation
  43      * is really transparent. The states will be restored by the blitter once
  44      * copying is done. */
  45     util_blitter_save_blend(r300->blitter, r300->blend_state.state);
  46     util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
  47     util_blitter_save_stencil_ref(r300->blitter, &(r300->stencil_ref));
  48     util_blitter_save_rasterizer(r300->blitter, r300->rs_state.state);
  49     util_blitter_save_fragment_shader(r300->blitter, r300->fs.state);
  50     util_blitter_save_vertex_shader(r300->blitter, r300->vs_state.state);
  51     util_blitter_save_viewport(r300->blitter, &r300->viewport);
  52     util_blitter_save_clip(r300->blitter, (struct pipe_clip_state*)r300->clip_state.state);
  53     util_blitter_save_vertex_elements(r300->blitter, r300->velems);
  54     util_blitter_save_vertex_buffers(r300->blitter, r300->vertex_buffer_count,
  55                                      r300->vertex_buffer);
  56
  57     if (op & (R300_CLEAR_SURFACE | R300_COPY))
  58         util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
  59
  60     if (op & R300_COPY) {
  61         struct r300_textures_state* state =
  62             (struct r300_textures_state*)r300->textures_state.state;
  63
  64         util_blitter_save_fragment_sampler_states(
  65             r300->blitter, state->sampler_state_count,
  66             (void**)state->sampler_states);
  67
  68         util_blitter_save_fragment_sampler_views(
  69             r300->blitter, state->sampler_view_count,
  70             (struct pipe_sampler_view**)state->sampler_views);
  71     }
  72 }
  73
  74 static void r300_blitter_end(struct r300_context *r300)
  75 {
  76     if (r300->blitter_saved_query) {
  77         r300_resume_query(r300, r300->blitter_saved_query);
  78         r300->blitter_saved_query = NULL;
  79     }
  80 }
  81
  82 /* Clear currently bound buffers. */
  83 static void r300_clear(struct pipe_context* pipe,
  84                        unsigned buffers,
  85                        const float* rgba,
  86                        double depth,
  87                        unsigned stencil)
  88 {
  89     /* My notes about fastfill:
  90      *
  91      * 1) Only the zbuffer is cleared.
  92      *
  93      * 2) The zbuffer must be micro-tiled and whole microtiles must be
  94      *    written. If microtiling is disabled, it locks up.
  95      *
  96      * 3) There is Z Mask RAM which contains a compressed zbuffer and
  97      *    it interacts with fastfill. We should figure out how to use it
  98      *    to get more performance.
  99      *    This is what we know about the Z Mask:
 100      *
 101      *       Each dword of the Z Mask contains compression information
 102      *       for 16 4x4 pixel blocks, that is 2 bits for each block.
 103      *       On chips with 2 Z pipes, every other dword maps to a different
 104      *       pipe.
 105      *
 106      * 4) ZB_DEPTHCLEARVALUE is used to clear the zbuffer and the Z Mask must
 107      *    be equal to 0. (clear the Z Mask RAM with zeros)
 108      *
 109      * 5) For 16-bit zbuffer, compression causes a hung with one or
 110      *    two samples and should not be used.
 111      *
 112      * 6) FORCE_COMPRESSED_STENCIL_VALUE should be enabled for stencil clears
 113      *    to avoid needless decompression.
 114      *
 115      * 7) Fastfill must not be used if reading of compressed Z data is disabled
 116      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
 117      *    i.e. it cannot be used to compress the zbuffer.
 118      *
 119      * 8) ZB_CB_CLEAR does not interact with fastfill in any way.
 120      *
 121      * - Marek
 122      */
 123
 124     struct r300_context* r300 = r300_context(pipe);
 125     struct pipe_framebuffer_state *fb =
 126         (struct pipe_framebuffer_state*)r300->fb_state.state;
 127
 128     /* Clear. */
 129     r300_blitter_begin(r300, R300_CLEAR);
 130     util_blitter_clear(r300->blitter,
 131                        fb->width,
 132                        fb->height,
 133                        fb->nr_cbufs,
 134                        buffers, rgba, depth, stencil);
 135     r300_blitter_end(r300);
 136
 137     /* XXX this flush "fixes" a hardlock in the cubestorm xscreensaver */
 138     if (r300->flush_counter == 0)
 139         pipe->flush(pipe, 0, NULL);
 140 }
 141
 142 /* Clear a region of a color surface to a constant value. */
 143 static void r300_clear_render_target(struct pipe_context *pipe,
 144                                      struct pipe_surface *dst,
 145                                      const float *rgba,
 146                                      unsigned dstx, unsigned dsty,
 147                                      unsigned width, unsigned height)
 148 {
 149     struct r300_context *r300 = r300_context(pipe);
 150
 151     r300_blitter_begin(r300, R300_CLEAR_SURFACE);
 152     util_blitter_clear_render_target(r300->blitter, dst, rgba,
 153                                      dstx, dsty, width, height);
 154     r300_blitter_end(r300);
 155 }
 156
 157 /* Clear a region of a depth stencil surface. */
 158 static void r300_clear_depth_stencil(struct pipe_context *pipe,
 159                                      struct pipe_surface *dst,
 160                                      unsigned clear_flags,
 161                                      double depth,
 162                                      unsigned stencil,
 163                                      unsigned dstx, unsigned dsty,
 164                                      unsigned width, unsigned height)
 165 {
 166     struct r300_context *r300 = r300_context(pipe);
 167
 168     r300_blitter_begin(r300, R300_CLEAR_SURFACE);
 169     util_blitter_clear_depth_stencil(r300->blitter, dst, clear_flags, depth, stencil,
 170                                      dstx, dsty, width, height);
 171     r300_blitter_end(r300);
 172 }
 173
 174 /* Copy a block of pixels from one surface to another using HW. */
 175 static void r300_hw_copy_region(struct pipe_context* pipe,
 176                                 struct pipe_resource *dst,
 177                                 struct pipe_subresource subdst,
 178                                 unsigned dstx, unsigned dsty, unsigned dstz,
 179                                 struct pipe_resource *src,
 180                                 struct pipe_subresource subsrc,
 181                                 unsigned srcx, unsigned srcy, unsigned srcz,
 182                                 unsigned width, unsigned height)
 183 {
 184     struct r300_context* r300 = r300_context(pipe);
 185
 186     r300_blitter_begin(r300, R300_COPY);
 187     util_blitter_copy_region(r300->blitter, dst, subdst, dstx, dsty, dstz,
 188                              src, subsrc, srcx, srcy, srcz, width, height,
 189                              TRUE);
 190     r300_blitter_end(r300);
 191 }
 192
 193 /* Copy a block of pixels from one surface to another. */
 194 static void r300_resource_copy_region(struct pipe_context *pipe,
 195                                       struct pipe_resource *dst,
 196                                       struct pipe_subresource subdst,
 197                                       unsigned dstx, unsigned dsty, unsigned dstz,
 198                                       struct pipe_resource *src,
 199                                       struct pipe_subresource subsrc,
 200                                       unsigned srcx, unsigned srcy, unsigned srcz,
 201                                       unsigned width, unsigned height)
 202 {
 203     enum pipe_format old_format = dst->format;
 204     enum pipe_format new_format = old_format;
 205
 206     if (!pipe->screen->is_format_supported(pipe->screen,
 207                                            old_format, src->target,
 208                                            src->nr_samples,
 209                                            PIPE_BIND_RENDER_TARGET |
 210                                            PIPE_BIND_SAMPLER_VIEW, 0) &&
 211         util_format_is_plain(old_format)) {
 212         switch (util_format_get_blocksize(old_format)) {
 213             case 1:
 214                 new_format = PIPE_FORMAT_I8_UNORM;
 215                 break;
 216             case 2:
 217                 new_format = PIPE_FORMAT_B4G4R4A4_UNORM;
 218                 break;
 219             case 4:
 220                 new_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 221                 break;
 222             case 8:
 223                 new_format = PIPE_FORMAT_R16G16B16A16_UNORM;
 224                 break;
 225             default:
 226                 debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
 227                              "r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
 228                              util_format_short_name(old_format));
 229         }
 230     }
 231
 232     if (old_format != new_format) {
 233         dst->format = new_format;
 234         src->format = new_format;
 235
 236         r300_texture_reinterpret_format(pipe->screen,
 237                                         dst, new_format);
 238         r300_texture_reinterpret_format(pipe->screen,
 239                                         src, new_format);
 240     }
 241
 242     r300_hw_copy_region(pipe, dst, subdst, dstx, dsty, dstz,
 243                         src, subsrc, srcx, srcy, srcz, width, height);
 244
 245     if (old_format != new_format) {
 246         dst->format = old_format;
 247         src->format = old_format;
 248
 249         r300_texture_reinterpret_format(pipe->screen,
 250                                         dst, old_format);
 251         r300_texture_reinterpret_format(pipe->screen,
 252                                         src, old_format);
 253     }
 254 }
 255
 256 void r300_init_blit_functions(struct r300_context *r300)
 257 {
 258     r300->context.clear = r300_clear;
 259     r300->context.clear_render_target = r300_clear_render_target;
 260     r300->context.clear_depth_stencil = r300_clear_depth_stencil;
 261     r300->context.resource_copy_region = r300_resource_copy_region;
 262 }