src/gallium/drivers/i915/i915_surface.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "i915_surface.h"
  29 #include "i915_resource.h"
  30 #include "i915_blit.h"
  31 #include "i915_reg.h"
  32 #include "i915_screen.h"
  33 #include "pipe/p_defines.h"
  34 #include "util/u_inlines.h"
  35 #include "util/u_math.h"
  36 #include "util/u_format.h"
  37 #include "util/u_memory.h"
  38 #include "util/u_pack_color.h"
  39
  40
  41 /* Assumes all values are within bounds -- no checking at this level -
  42  * do it higher up if required.
  43  */
  44 static void
  45 i915_surface_copy(struct pipe_context *pipe,
  46                   struct pipe_resource *dst, unsigned dst_level,
  47                   unsigned dstx, unsigned dsty, unsigned dstz,
  48                   struct pipe_resource *src, unsigned src_level,
  49                   const struct pipe_box *src_box)
  50 {
  51    struct i915_texture *dst_tex = i915_texture(dst);
  52    struct i915_texture *src_tex = i915_texture(src);
  53    struct pipe_resource *dpt = &dst_tex->b.b;
  54    struct pipe_resource *spt = &src_tex->b.b;
  55    unsigned dst_offset, src_offset;  /* in bytes */
  56
  57    /* XXX cannot copy 3d regions at this time */
  58    assert(src_box->depth == 1);
  59    if (dst->target != PIPE_TEXTURE_CUBE &&
  60        dst->target != PIPE_TEXTURE_3D)
  61       assert(dstz == 0);
  62    dst_offset = i915_texture_offset(dst_tex, dst_level, dstz);
  63
  64    if (src->target != PIPE_TEXTURE_CUBE &&
  65        src->target != PIPE_TEXTURE_3D)
  66       assert(src_box->z == 0);
  67    src_offset = i915_texture_offset(src_tex, src_level, src_box->z);
  68
  69    assert( dst != src );
  70    assert( util_format_get_blocksize(dpt->format) == util_format_get_blocksize(spt->format) );
  71    assert( util_format_get_blockwidth(dpt->format) == util_format_get_blockwidth(spt->format) );
  72    assert( util_format_get_blockheight(dpt->format) == util_format_get_blockheight(spt->format) );
  73    assert( util_format_get_blockwidth(dpt->format) == 1 );
  74    assert( util_format_get_blockheight(dpt->format) == 1 );
  75
  76    i915_copy_blit( i915_context(pipe),
  77                    util_format_get_blocksize(dpt->format),
  78                    (unsigned short) src_tex->stride, src_tex->buffer, src_offset,
  79                    (unsigned short) dst_tex->stride, dst_tex->buffer, dst_offset,
  80                    (short) src_box->x, (short) src_box->y, (short) dstx, (short) dsty,
  81                    (short) src_box->width, (short) src_box->height );
  82 }
  83
  84
  85 static void
  86 i915_clear_render_target(struct pipe_context *pipe,
  87                          struct pipe_surface *dst,
  88                          const float *rgba,
  89                          unsigned dstx, unsigned dsty,
  90                          unsigned width, unsigned height)
  91 {
  92    struct i915_texture *tex = i915_texture(dst->texture);
  93    struct pipe_resource *pt = &tex->b.b;
  94    union util_color uc;
  95    unsigned offset = i915_texture_offset(tex, dst->u.tex.level, dst->u.tex.first_layer);
  96
  97    assert(util_format_get_blockwidth(pt->format) == 1);
  98    assert(util_format_get_blockheight(pt->format) == 1);
  99
 100    util_pack_color(rgba, dst->format, &uc);
 101    i915_fill_blit( i915_context(pipe),
 102                    util_format_get_blocksize(pt->format),
 103                    XY_COLOR_BLT_WRITE_ALPHA | XY_COLOR_BLT_WRITE_RGB,
 104                    (unsigned short) tex->stride,
 105                    tex->buffer, offset,
 106                    (short) dstx, (short) dsty,
 107                    (short) width, (short) height,
 108                    uc.ui );
 109 }
 110
 111 static void
 112 i915_clear_depth_stencil(struct pipe_context *pipe,
 113                          struct pipe_surface *dst,
 114                          unsigned clear_flags,
 115                          double depth,
 116                          unsigned stencil,
 117                          unsigned dstx, unsigned dsty,
 118                          unsigned width, unsigned height)
 119 {
 120    struct i915_texture *tex = i915_texture(dst->texture);
 121    struct pipe_resource *pt = &tex->b.b;
 122    unsigned packedds;
 123    unsigned mask = 0;
 124    unsigned offset = i915_texture_offset(tex, dst->u.tex.level, dst->u.tex.first_layer);
 125
 126    assert(util_format_get_blockwidth(pt->format) == 1);
 127    assert(util_format_get_blockheight(pt->format) == 1);
 128
 129    packedds = util_pack_z_stencil(dst->format, depth, stencil);
 130
 131    if (clear_flags & PIPE_CLEAR_DEPTH)
 132       mask |= XY_COLOR_BLT_WRITE_RGB;
 133    /* XXX presumably this does read-modify-write
 134       (otherwise this won't work anyway). Hence will only want to
 135       do it if really have stencil and it isn't cleared */
 136    if ((clear_flags & PIPE_CLEAR_STENCIL) ||
 137        (dst->format != PIPE_FORMAT_Z24_UNORM_S8_USCALED))
 138       mask |= XY_COLOR_BLT_WRITE_ALPHA;
 139
 140    i915_fill_blit( i915_context(pipe),
 141                    util_format_get_blocksize(pt->format),
 142                    mask,
 143                    (unsigned short) tex->stride,
 144                    tex->buffer, offset,
 145                    (short) dstx, (short) dsty,
 146                    (short) width, (short) height,
 147                    packedds );
 148 }
 149
 150 /*
 151  * Screen surface functions
 152  */
 153
 154
 155 static struct pipe_surface *
 156 i915_create_surface(struct pipe_context *ctx,
 157                     struct pipe_resource *pt,
 158                     const struct pipe_surface *surf_tmpl)
 159 {
 160    struct pipe_surface *ps;
 161
 162    assert(surf_tmpl->u.tex.first_layer == surf_tmpl->u.tex.last_layer);
 163    if (pt->target != PIPE_TEXTURE_CUBE &&
 164        pt->target != PIPE_TEXTURE_3D)
 165       assert(surf_tmpl->u.tex.first_layer == 0);
 166
 167    ps = CALLOC_STRUCT(pipe_surface);
 168    if (ps) {
 169       /* could subclass pipe_surface and store offset as it used to do */
 170       pipe_reference_init(&ps->reference, 1);
 171       pipe_resource_reference(&ps->texture, pt);
 172       ps->format = surf_tmpl->format;
 173       ps->width = u_minify(pt->width0, surf_tmpl->u.tex.level);
 174       ps->height = u_minify(pt->height0, surf_tmpl->u.tex.level);
 175       ps->u.tex.level = surf_tmpl->u.tex.level;
 176       ps->u.tex.first_layer = surf_tmpl->u.tex.first_layer;
 177       ps->u.tex.last_layer = surf_tmpl->u.tex.last_layer;
 178       ps->usage = surf_tmpl->usage;
 179       ps->context = ctx;
 180    }
 181    return ps;
 182 }
 183
 184 static void
 185 i915_surface_destroy(struct pipe_context *ctx,
 186                      struct pipe_surface *surf)
 187 {
 188    pipe_resource_reference(&surf->texture, NULL);
 189    FREE(surf);
 190 }
 191
 192
 193 void
 194 i915_init_surface_functions(struct i915_context *i915)
 195 {
 196    i915->base.resource_copy_region = i915_surface_copy;
 197    i915->base.clear_render_target = i915_clear_render_target;
 198    i915->base.clear_depth_stencil = i915_clear_depth_stencil;
 199    i915->base.create_surface = i915_create_surface;
 200    i915->base.surface_destroy = i915_surface_destroy;
 201 }