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);
  37 }
  38
  39 /* Clear currently bound buffers. */
  40 void r300_clear(struct pipe_context* pipe,
  41                 unsigned buffers,
  42                 const float* rgba,
  43                 double depth,
  44                 unsigned stencil)
  45 {
  46     /* XXX Implement fastfill.
  47      *
  48      * If fastfill is enabled, a few facts should be considered:
  49      *
  50      * 1) Zbuffer must be micro-tiled and whole microtiles must be
  51      *    written.
  52      *
  53      * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
  54      *    equal to 0.
  55      *
  56      * 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
  57      *    RB3D_COLOR_CHANNEL_MASK must be equal to 0.
  58      *
  59      * 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
  60      *    the colorbuffer. The color clear value is supplied through both
  61      *    RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
  62      *    must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
  63      *    RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
  64      *    will not be cleared and multiple render targets cannot be cleared
  65      *    this way either.
  66      *
  67      * 5) For 16-bit integer buffering, compression causes a hung with one or
  68      *    two samples and should not be used.
  69      *
  70      * 6) Fastfill must not be used if reading of compressed Z data is disabled
  71      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
  72      *    i.e. it cannot be used to compress the zbuffer.
  73      *    (what the hell does that mean and how does it fit in clearing
  74      *    the buffers?)
  75      *
  76      * - Marek
  77      */
  78
  79     struct r300_context* r300 = r300_context(pipe);
  80     struct pipe_framebuffer_state* fb =
  81         (struct pipe_framebuffer_state*)r300->fb_state.state;
  82
  83     r300_blitter_save_states(r300);
  84
  85     util_blitter_clear(r300->blitter,
  86                        fb->width,
  87                        fb->height,
  88                        fb->nr_cbufs,
  89                        buffers, rgba, depth, stencil);
  90 }
  91
  92 /* Copy a block of pixels from one surface to another using HW. */
  93 static void r300_hw_copy(struct pipe_context* pipe,
  94                          struct pipe_surface* dst,
  95                          unsigned dstx, unsigned dsty,
  96                          struct pipe_surface* src,
  97                          unsigned srcx, unsigned srcy,
  98                          unsigned width, unsigned height)
  99 {
 100     struct r300_context* r300 = r300_context(pipe);
 101
 102     /* Yeah we have to save all those states to ensure this blitter operation
 103      * is really transparent. The states will be restored by the blitter once
 104      * copying is done. */
 105     r300_blitter_save_states(r300);
 106     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 107
 108     util_blitter_save_fragment_sampler_states(
 109         r300->blitter, r300->sampler_count, (void**)r300->sampler_states);
 110
 111     util_blitter_save_fragment_sampler_textures(
 112         r300->blitter, r300->texture_count,
 113         (struct pipe_texture**)r300->textures);
 114
 115     /* Do a copy */
 116     util_blitter_copy(r300->blitter,
 117                       dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
 118 }
 119
 120 /* Copy a block of pixels from one surface to another. */
 121 void r300_surface_copy(struct pipe_context* pipe,
 122                        struct pipe_surface* dst,
 123                        unsigned dstx, unsigned dsty,
 124                        struct pipe_surface* src,
 125                        unsigned srcx, unsigned srcy,
 126                        unsigned width, unsigned height)
 127 {
 128     enum pipe_format old_format = dst->texture->format;
 129     enum pipe_format new_format = old_format;
 130
 131     assert(dst->texture->format == src->texture->format);
 132
 133     if (!pipe->screen->is_format_supported(pipe->screen,
 134                                            old_format, src->texture->target,
 135                                            PIPE_TEXTURE_USAGE_RENDER_TARGET |
 136                                            PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 137         switch (util_format_get_blocksize(old_format)) {
 138             case 1:
 139                 new_format = PIPE_FORMAT_I8_UNORM;
 140                 break;
 141             case 2:
 142                 new_format = PIPE_FORMAT_A4R4G4B4_UNORM;
 143                 break;
 144             case 4:
 145                 new_format = PIPE_FORMAT_A8R8G8B8_UNORM;
 146                 break;
 147             default:
 148                 debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
 149                              "r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
 150                              util_format_name(old_format));
 151         }
 152     }
 153
 154     if (old_format != new_format) {
 155         dst->format = new_format;
 156         src->format = new_format;
 157
 158         r300_texture_reinterpret_format(pipe->screen,
 159                                         dst->texture, new_format);
 160         r300_texture_reinterpret_format(pipe->screen,
 161                                         src->texture, new_format);
 162     }
 163
 164     r300_hw_copy(pipe, dst, dstx, dsty, src, srcx, srcy, width, height);
 165
 166     if (old_format != new_format) {
 167         dst->format = old_format;
 168         src->format = old_format;
 169
 170         r300_texture_reinterpret_format(pipe->screen,
 171                                         dst->texture, old_format);
 172         r300_texture_reinterpret_format(pipe->screen,
 173                                         src->texture, old_format);
 174     }
 175 }
 176
 177 /* Fill a region of a surface with a constant value. */
 178 void r300_surface_fill(struct pipe_context* pipe,
 179                        struct pipe_surface* dst,
 180                        unsigned dstx, unsigned dsty,
 181                        unsigned width, unsigned height,
 182                        unsigned value)
 183 {
 184     struct r300_context* r300 = r300_context(pipe);
 185
 186     r300_blitter_save_states(r300);
 187     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 188
 189     util_blitter_fill(r300->blitter,
 190                       dst, dstx, dsty, width, height, value);
 191 }