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_blit.h"
  24 #include "r300_context.h"
  25 #include "r300_texture.h"
  26
  27 #include "util/u_format.h"
  28
  29 static void r300_blitter_save_states(struct r300_context* r300)
  30 {
  31     util_blitter_save_blend(r300->blitter, r300->blend_state.state);
  32     util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
  33     util_blitter_save_stencil_ref(r300->blitter, &(r300->stencil_ref));
  34     util_blitter_save_rasterizer(r300->blitter, r300->rs_state.state);
  35     util_blitter_save_fragment_shader(r300->blitter, r300->fs);
  36     util_blitter_save_vertex_shader(r300->blitter, r300->vs_state.state);
  37     util_blitter_save_viewport(r300->blitter, &r300->viewport);
  38     util_blitter_save_clip(r300->blitter, &r300->clip);
  39 }
  40
  41 /* Clear currently bound buffers. */
  42 void r300_clear(struct pipe_context* pipe,
  43                 unsigned buffers,
  44                 const float* rgba,
  45                 double depth,
  46                 unsigned stencil)
  47 {
  48     /* XXX Implement fastfill.
  49      *
  50      * If fastfill is enabled, a few facts should be considered:
  51      *
  52      * 1) Zbuffer must be micro-tiled and whole microtiles must be
  53      *    written.
  54      *
  55      * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
  56      *    equal to 0.
  57      *
  58      * 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
  59      *    RB3D_COLOR_CHANNEL_MASK must be equal to 0.
  60      *
  61      * 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
  62      *    the colorbuffer. The color clear value is supplied through both
  63      *    RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
  64      *    must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
  65      *    RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
  66      *    will not be cleared and multiple render targets cannot be cleared
  67      *    this way either.
  68      *
  69      * 5) For 16-bit integer buffering, compression causes a hung with one or
  70      *    two samples and should not be used.
  71      *
  72      * 6) Fastfill must not be used if reading of compressed Z data is disabled
  73      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
  74      *    i.e. it cannot be used to compress the zbuffer.
  75      *    (what the hell does that mean and how does it fit in clearing
  76      *    the buffers?)
  77      *
  78      * - Marek
  79      */
  80
  81     struct r300_context* r300 = r300_context(pipe);
  82     struct pipe_framebuffer_state* fb =
  83         (struct pipe_framebuffer_state*)r300->fb_state.state;
  84
  85     r300_blitter_save_states(r300);
  86
  87     util_blitter_clear(r300->blitter,
  88                        fb->width,
  89                        fb->height,
  90                        fb->nr_cbufs,
  91                        buffers, rgba, depth, stencil);
  92 }
  93
  94 /* Copy a block of pixels from one surface to another using HW. */
  95 static void r300_hw_copy(struct pipe_context* pipe,
  96                          struct pipe_surface* dst,
  97                          unsigned dstx, unsigned dsty,
  98                          struct pipe_surface* src,
  99                          unsigned srcx, unsigned srcy,
 100                          unsigned width, unsigned height)
 101 {
 102     struct r300_context* r300 = r300_context(pipe);
 103     struct r300_textures_state* state =
 104         (struct r300_textures_state*)r300->textures_state.state;
 105
 106     /* Yeah we have to save all those states to ensure this blitter operation
 107      * is really transparent. The states will be restored by the blitter once
 108      * copying is done. */
 109     r300_blitter_save_states(r300);
 110     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 111
 112     util_blitter_save_fragment_sampler_states(
 113         r300->blitter, state->sampler_count, (void**)state->sampler_states);
 114
 115     util_blitter_save_fragment_sampler_textures(
 116         r300->blitter, state->texture_count,
 117         (struct pipe_texture**)state->textures);
 118
 119     /* Do a copy */
 120     util_blitter_copy(r300->blitter,
 121                       dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
 122 }
 123
 124 /* Copy a block of pixels from one surface to another. */
 125 void r300_surface_copy(struct pipe_context* pipe,
 126                        struct pipe_surface* dst,
 127                        unsigned dstx, unsigned dsty,
 128                        struct pipe_surface* src,
 129                        unsigned srcx, unsigned srcy,
 130                        unsigned width, unsigned height)
 131 {
 132     enum pipe_format old_format = dst->texture->format;
 133     enum pipe_format new_format = old_format;
 134
 135     assert(dst->texture->format == src->texture->format);
 136
 137     if (!pipe->screen->is_format_supported(pipe->screen,
 138                                            old_format, src->texture->target,
 139                                            PIPE_TEXTURE_USAGE_RENDER_TARGET |
 140                                            PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 141         switch (util_format_get_blocksize(old_format)) {
 142             case 1:
 143                 new_format = PIPE_FORMAT_I8_UNORM;
 144                 break;
 145             case 2:
 146                 new_format = PIPE_FORMAT_B4G4R4A4_UNORM;
 147                 break;
 148             case 4:
 149                 new_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 150                 break;
 151             default:
 152                 debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
 153                              "r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
 154                              util_format_name(old_format));
 155         }
 156     }
 157
 158     if (old_format != new_format) {
 159         dst->format = new_format;
 160         src->format = new_format;
 161
 162         r300_texture_reinterpret_format(pipe->screen,
 163                                         dst->texture, new_format);
 164         r300_texture_reinterpret_format(pipe->screen,
 165                                         src->texture, new_format);
 166     }
 167
 168     r300_hw_copy(pipe, dst, dstx, dsty, src, srcx, srcy, width, height);
 169
 170     if (old_format != new_format) {
 171         dst->format = old_format;
 172         src->format = old_format;
 173
 174         r300_texture_reinterpret_format(pipe->screen,
 175                                         dst->texture, old_format);
 176         r300_texture_reinterpret_format(pipe->screen,
 177                                         src->texture, old_format);
 178     }
 179 }
 180
 181 /* Fill a region of a surface with a constant value. */
 182 void r300_surface_fill(struct pipe_context* pipe,
 183                        struct pipe_surface* dst,
 184                        unsigned dstx, unsigned dsty,
 185                        unsigned width, unsigned height,
 186                        unsigned value)
 187 {
 188     struct r300_context* r300 = r300_context(pipe);
 189
 190     r300_blitter_save_states(r300);
 191     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 192
 193     util_blitter_fill(r300->blitter,
 194                       dst, dstx, dsty, width, height, value);
 195 }