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
  26 #include "util/u_rect.h"
  27
  28 static void r300_blitter_save_states(struct r300_context* r300)
  29 {
  30     util_blitter_save_blend(r300->blitter, r300->blend_state.state);
  31     util_blitter_save_depth_stencil_alpha(r300->blitter, r300->dsa_state.state);
  32     util_blitter_save_rasterizer(r300->blitter, r300->rs_state.state);
  33     util_blitter_save_fragment_shader(r300->blitter, r300->fs);
  34     util_blitter_save_vertex_shader(r300->blitter, r300->vs);
  35 }
  36
  37 /* Clear currently bound buffers. */
  38 void r300_clear(struct pipe_context* pipe,
  39                 unsigned buffers,
  40                 const float* rgba,
  41                 double depth,
  42                 unsigned stencil)
  43 {
  44     /* XXX Implement fastfill.
  45      *
  46      * If fastfill is enabled, a few facts should be considered:
  47      *
  48      * 1) Zbuffer must be micro-tiled and whole microtiles must be
  49      *    written.
  50      *
  51      * 2) ZB_DEPTHCLEARVALUE is used to clear a zbuffer and Z Mask must be
  52      *    equal to 0.
  53      *
  54      * 3) RB3D_COLOR_CLEAR_VALUE is used to clear a colorbuffer and
  55      *    RB3D_COLOR_CHANNEL_MASK must be equal to 0.
  56      *
  57      * 4) ZB_CB_CLEAR can be used to make the ZB units help in clearing
  58      *    the colorbuffer. The color clear value is supplied through both
  59      *    RB3D_COLOR_CLEAR_VALUE and ZB_DEPTHCLEARVALUE, and the colorbuffer
  60      *    must be set in ZB_DEPTHOFFSET and ZB_DEPTHPITCH in addition to
  61      *    RB3D_COLOROFFSET and RB3D_COLORPITCH. It's obvious that the zbuffer
  62      *    will not be cleared and multiple render targets cannot be cleared
  63      *    this way either.
  64      *
  65      * 5) For 16-bit integer buffering, compression causes a hung with one or
  66      *    two samples and should not be used.
  67      *
  68      * 6) Fastfill must not be used if reading of compressed Z data is disabled
  69      *    and writing of compressed Z data is enabled (RD/WR_COMP_ENABLE),
  70      *    i.e. it cannot be used to compress the zbuffer.
  71      *    (what the hell does that mean and how does it fit in clearing
  72      *    the buffers?)
  73      *
  74      * - Marek
  75      */
  76
  77     struct r300_context* r300 = r300_context(pipe);
  78
  79     r300_blitter_save_states(r300);
  80
  81     util_blitter_clear(r300->blitter,
  82                        r300->framebuffer_state.width,
  83                        r300->framebuffer_state.height,
  84                        r300->framebuffer_state.nr_cbufs,
  85                        buffers, rgba, depth, stencil);
  86 }
  87
  88 /* Copy a block of pixels from one surface to another. */
  89 void r300_surface_copy(struct pipe_context* pipe,
  90                        struct pipe_surface* dst,
  91                        unsigned dstx, unsigned dsty,
  92                        struct pipe_surface* src,
  93                        unsigned srcx, unsigned srcy,
  94                        unsigned width, unsigned height)
  95 {
  96     struct r300_context* r300 = r300_context(pipe);
  97
  98     /* Yeah we have to save all those states to ensure this blitter operation
  99      * is really transparent. The states will be restored by the blitter once
 100      * copying is done. */
 101     r300_blitter_save_states(r300);
 102     util_blitter_save_framebuffer(r300->blitter, &r300->framebuffer_state);
 103
 104     util_blitter_save_fragment_sampler_states(
 105         r300->blitter, r300->sampler_count, (void**)r300->sampler_states);
 106
 107     util_blitter_save_fragment_sampler_textures(
 108         r300->blitter, r300->texture_count,
 109         (struct pipe_texture**)r300->textures);
 110
 111     /* Do a copy */
 112     util_blitter_copy(r300->blitter,
 113                       dst, dstx, dsty, src, srcx, srcy, width, height, TRUE);
 114 }
 115
 116 /* Fill a region of a surface with a constant value. */
 117 void r300_surface_fill(struct pipe_context* pipe,
 118                        struct pipe_surface* dst,
 119                        unsigned dstx, unsigned dsty,
 120                        unsigned width, unsigned height,
 121                        unsigned value)
 122 {
 123     struct r300_context* r300 = r300_context(pipe);
 124
 125     r300_blitter_save_states(r300);
 126     util_blitter_save_framebuffer(r300->blitter, &r300->framebuffer_state);
 127
 128     util_blitter_fill(r300->blitter,
 129                       dst, dstx, dsty, width, height, value);
 130 }