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     util_blitter_save_vertex_elements(r300->blitter, r300->velems);
  40 }
  41
  42 /* Clear currently bound buffers. */
  43 void r300_clear(struct pipe_context* pipe,
  44                 unsigned buffers,
  45                 const float* rgba,
  46                 double depth,
  47                 unsigned stencil)
  48 {
  49     /* XXX Implement fastfill.
  50      *
  51      * If fastfill is enabled, a few facts should be considered:
  52      *
  53      * 1) Zbuffer must be micro-tiled and whole microtiles must be
  54      *    written.
  55      *
  56      * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
  57      *    equal to 0.
  58      *
  59      * 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
  60      *    RB3D_COLOR_CHANNEL_MASK must be equal to 0.
  61      *
  62      * 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
  63      *    the colorbuffer. The color clear value is supplied through both
  64      *    RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
  65      *    must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
  66      *    RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
  67      *    will not be cleared and multiple render targets cannot be cleared
  68      *    this way either.
  69      *
  70      * 5) For 16-bit integer buffering, compression causes a hung with one or
  71      *    two samples and should not be used.
  72      *
  73      * 6) Fastfill must not be used if reading of compressed Z data is disabled
  74      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
  75      *    i.e. it cannot be used to compress the zbuffer.
  76      *    (what the hell does that mean and how does it fit in clearing
  77      *    the buffers?)
  78      *
  79      * - Marek
  80      */
  81
  82     struct r300_context* r300 = r300_context(pipe);
  83     struct pipe_framebuffer_state* fb =
  84         (struct pipe_framebuffer_state*)r300->fb_state.state;
  85
  86     r300_blitter_save_states(r300);
  87
  88     util_blitter_clear(r300->blitter,
  89                        fb->width,
  90                        fb->height,
  91                        fb->nr_cbufs,
  92                        buffers, rgba, depth, stencil);
  93 }
  94
  95 /* Copy a block of pixels from one surface to another using HW. */
  96 static void r300_hw_copy(struct pipe_context* pipe,
  97                          struct pipe_surface* dst,
  98                          unsigned dstx, unsigned dsty,
  99                          struct pipe_surface* src,
 100                          unsigned srcx, unsigned srcy,
 101                          unsigned width, unsigned height)
 102 {
 103     struct r300_context* r300 = r300_context(pipe);
 104     struct r300_textures_state* state =
 105         (struct r300_textures_state*)r300->textures_state.state;
 106
 107     /* Yeah we have to save all those states to ensure this blitter operation
 108      * is really transparent. The states will be restored by the blitter once
 109      * copying is done. */
 110     r300_blitter_save_states(r300);
 111     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 112
 113     util_blitter_save_fragment_sampler_states(
 114         r300->blitter, state->sampler_count, (void**)state->sampler_states);
 115
 116     util_blitter_save_fragment_sampler_textures(
 117         r300->blitter, state->texture_count,
 118         (struct pipe_texture**)state->textures);
 119
 120     /* Do a copy */
 121     util_blitter_copy(r300->blitter,
 122                       dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
 123 }
 124
 125 /* Copy a block of pixels from one surface to another. */
 126 void r300_surface_copy(struct pipe_context* pipe,
 127                        struct pipe_surface* dst,
 128                        unsigned dstx, unsigned dsty,
 129                        struct pipe_surface* src,
 130                        unsigned srcx, unsigned srcy,
 131                        unsigned width, unsigned height)
 132 {
 133     enum pipe_format old_format = dst->texture->format;
 134     enum pipe_format new_format = old_format;
 135
 136     assert(dst->texture->format == src->texture->format);
 137
 138     if (!pipe->screen->is_format_supported(pipe->screen,
 139                                            old_format, src->texture->target,
 140                                            PIPE_TEXTURE_USAGE_RENDER_TARGET |
 141                                            PIPE_TEXTURE_USAGE_SAMPLER, 0)) {
 142         switch (util_format_get_blocksize(old_format)) {
 143             case 1:
 144                 new_format = PIPE_FORMAT_I8_UNORM;
 145                 break;
 146             case 2:
 147                 new_format = PIPE_FORMAT_B4G4R4A4_UNORM;
 148                 break;
 149             case 4:
 150                 new_format = PIPE_FORMAT_B8G8R8A8_UNORM;
 151                 break;
 152             default:
 153                 debug_printf("r300: surface_copy: Unhandled format: %s. Falling back to software.\n"
 154                              "r300: surface_copy: Software fallback doesn't work for tiled textures.\n",
 155                              util_format_name(old_format));
 156         }
 157     }
 158
 159     if (old_format != new_format) {
 160         dst->format = new_format;
 161         src->format = new_format;
 162
 163         r300_texture_reinterpret_format(pipe->screen,
 164                                         dst->texture, new_format);
 165         r300_texture_reinterpret_format(pipe->screen,
 166                                         src->texture, new_format);
 167     }
 168
 169     r300_hw_copy(pipe, dst, dstx, dsty, src, srcx, srcy, width, height);
 170
 171     if (old_format != new_format) {
 172         dst->format = old_format;
 173         src->format = old_format;
 174
 175         r300_texture_reinterpret_format(pipe->screen,
 176                                         dst->texture, old_format);
 177         r300_texture_reinterpret_format(pipe->screen,
 178                                         src->texture, old_format);
 179     }
 180 }
 181
 182 /* Fill a region of a surface with a constant value. */
 183 void r300_surface_fill(struct pipe_context* pipe,
 184                        struct pipe_surface* dst,
 185                        unsigned dstx, unsigned dsty,
 186                        unsigned width, unsigned height,
 187                        unsigned value)
 188 {
 189     struct r300_context* r300 = r300_context(pipe);
 190
 191     r300_blitter_save_states(r300);
 192     util_blitter_save_framebuffer(r300->blitter, r300->fb_state.state);
 193
 194     util_blitter_fill(r300->blitter,
 195                       dst, dstx, dsty, width, height, value);
 196 }