diff options
Diffstat (limited to 'src/gallium/drivers/i965simple/brw_tex_layout.c')
| -rw-r--r-- | src/gallium/drivers/i965simple/brw_tex_layout.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965simple/brw_tex_layout.c b/src/gallium/drivers/i965simple/brw_tex_layout.c new file mode 100644 index 00000000000..05eda9d1f26 --- /dev/null +++ b/src/gallium/drivers/i965simple/brw_tex_layout.c @@ -0,0 +1,400 @@ +/* + Copyright (C) Intel Corp. 2006. All Rights Reserved. + Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to + develop this 3D driver. + + Permission is hereby granted, free of charge, to any person obtaining + a copy of this software and associated documentation files (the + "Software"), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice (including the + next paragraph) shall be included in all copies or substantial + portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE + LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + **********************************************************************/ + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + + +/* Code to layout images in a mipmap tree for i965. + */ + +#include "pipe/p_state.h" +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "pipe/p_inlines.h" +#include "pipe/p_winsys.h" +#include "util/u_math.h" +#include "util/u_memory.h" +#include "brw_context.h" +#include "brw_tex_layout.h" + + +#define FILE_DEBUG_FLAG DEBUG_TEXTURE + +#if 0 +unsigned intel_compressed_alignment(unsigned internalFormat) +{ + unsigned alignment = 4; + + switch (internalFormat) { + case GL_COMPRESSED_RGB_FXT1_3DFX: + case GL_COMPRESSED_RGBA_FXT1_3DFX: + alignment = 8; + break; + + default: + break; + } + + return alignment; +} +#endif + +static unsigned minify( unsigned d ) +{ + return MAX2(1, d>>1); +} + + +static void intel_miptree_set_image_offset(struct brw_texture *tex, + unsigned level, + unsigned img, + unsigned x, unsigned y) +{ + struct pipe_texture *pt = &tex->base; + if (img == 0 && level == 0) + assert(x == 0 && y == 0); + assert(img < tex->nr_images[level]); + + tex->image_offset[level][img] = y * tex->stride + x * pt->block.size; +} + +static void intel_miptree_set_level_info(struct brw_texture *tex, + unsigned level, + unsigned nr_images, + unsigned x, unsigned y, + unsigned w, unsigned h, unsigned d) +{ + struct pipe_texture *pt = &tex->base; + + assert(level < PIPE_MAX_TEXTURE_LEVELS); + + pt->width[level] = w; + pt->height[level] = h; + pt->depth[level] = d; + + pt->nblocksx[level] = pf_get_nblocksx(&pt->block, w); + pt->nblocksy[level] = pf_get_nblocksy(&pt->block, h); + + tex->level_offset[level] = y * tex->stride + x * tex->base.block.size; + tex->nr_images[level] = nr_images; + + /* + DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__, + level, w, h, d, x, y, tex->level_offset[level]); + */ + + /* Not sure when this would happen, but anyway: + */ + if (tex->image_offset[level]) { + FREE(tex->image_offset[level]); + tex->image_offset[level] = NULL; + } + + assert(nr_images); + assert(!tex->image_offset[level]); + + tex->image_offset[level] = (unsigned *) MALLOC(nr_images * sizeof(unsigned)); + tex->image_offset[level][0] = 0; +} + +static void i945_miptree_layout_2d(struct brw_texture *tex) +{ + struct pipe_texture *pt = &tex->base; + const int align_x = 2, align_y = 4; + unsigned level; + unsigned x = 0; + unsigned y = 0; + unsigned width = pt->width[0]; + unsigned height = pt->height[0]; + unsigned nblocksx = pt->nblocksx[0]; + unsigned nblocksy = pt->nblocksy[0]; + + tex->stride = align(pt->nblocksx[0] * pt->block.size, 4); + + /* May need to adjust pitch to accomodate the placement of + * the 2nd mipmap level. This occurs when the alignment + * constraints of mipmap placement push the right edge of the + * 2nd mipmap level out past the width of its parent. + */ + if (pt->last_level > 0) { + unsigned mip1_nblocksx + = align(pf_get_nblocksx(&pt->block, minify(width)), align_x) + + pf_get_nblocksx(&pt->block, minify(minify(width))); + + if (mip1_nblocksx > nblocksx) + tex->stride = mip1_nblocksx * pt->block.size; + } + + /* Pitch must be a whole number of dwords + */ + tex->stride = align(tex->stride, 64); + tex->total_nblocksy = 0; + + for (level = 0; level <= pt->last_level; level++) { + intel_miptree_set_level_info(tex, level, 1, x, y, width, + height, 1); + + nblocksy = align(nblocksy, align_y); + + /* Because the images are packed better, the final offset + * might not be the maximal one: + */ + tex->total_nblocksy = MAX2(tex->total_nblocksy, y + nblocksy); + + /* Layout_below: step right after second mipmap level. + */ + if (level == 1) { + x += align(nblocksx, align_x); + } + else { + y += nblocksy; + } + + width = minify(width); + height = minify(height); + nblocksx = pf_get_nblocksx(&pt->block, width); + nblocksy = pf_get_nblocksy(&pt->block, height); + } +} + +static boolean brw_miptree_layout(struct brw_texture *tex) +{ + struct pipe_texture *pt = &tex->base; + /* XXX: these vary depending on image format: + */ +/* int align_w = 4; */ + + switch (pt->target) { + case PIPE_TEXTURE_CUBE: + case PIPE_TEXTURE_3D: { + unsigned width = pt->width[0]; + unsigned height = pt->height[0]; + unsigned depth = pt->depth[0]; + unsigned nblocksx = pt->nblocksx[0]; + unsigned nblocksy = pt->nblocksy[0]; + unsigned pack_x_pitch, pack_x_nr; + unsigned pack_y_pitch; + unsigned level; + unsigned align_h = 2; + unsigned align_w = 4; + + tex->total_nblocksy = 0; + + tex->stride = align(pt->nblocksx[0], 4); + pack_y_pitch = align(pt->nblocksy[0], align_h); + + pack_x_pitch = tex->stride / pt->block.size; + pack_x_nr = 1; + + for (level = 0; level <= pt->last_level; level++) { + unsigned nr_images = pt->target == PIPE_TEXTURE_3D ? depth : 6; + int x = 0; + int y = 0; + uint q, j; + + intel_miptree_set_level_info(tex, level, nr_images, + 0, tex->total_nblocksy, + width, height, depth); + + for (q = 0; q < nr_images;) { + for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) { + intel_miptree_set_image_offset(tex, level, q, x, y); + x += pack_x_pitch; + } + + x = 0; + y += pack_y_pitch; + } + + + tex->total_nblocksy += y; + width = minify(width); + height = minify(height); + depth = minify(depth); + nblocksx = pf_get_nblocksx(&pt->block, width); + nblocksy = pf_get_nblocksy(&pt->block, height); + + if (pt->compressed) { + pack_y_pitch = (height + 3) / 4; + + if (pack_x_pitch > align(width, align_w)) { + pack_x_pitch = align(width, align_w); + pack_x_nr <<= 1; + } + } else { + if (pack_x_pitch > 4) { + pack_x_pitch >>= 1; + pack_x_nr <<= 1; + assert(pack_x_pitch * pack_x_nr * pt->block.size <= tex->stride); + } + + if (pack_y_pitch > 2) { + pack_y_pitch >>= 1; + pack_y_pitch = align(pack_y_pitch, align_h); + } + } + + } + break; + } + + default: + i945_miptree_layout_2d(tex); + break; + } +#if 0 + PRINT("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__, + pt->pitch, + pt->total_nblocksy, + pt->block.size, + pt->stride * pt->total_nblocksy ); +#endif + + return TRUE; +} + + +static struct pipe_texture * +brw_texture_create_screen(struct pipe_screen *screen, + const struct pipe_texture *templat) +{ + struct pipe_winsys *ws = screen->winsys; + struct brw_texture *tex = CALLOC_STRUCT(brw_texture); + + if (tex) { + tex->base = *templat; + tex->base.refcount = 1; + + tex->base.nblocksx[0] = pf_get_nblocksx(&tex->base.block, tex->base.width[0]); + tex->base.nblocksy[0] = pf_get_nblocksy(&tex->base.block, tex->base.height[0]); + + if (brw_miptree_layout(tex)) + tex->buffer = ws->buffer_create(ws, 64, + PIPE_BUFFER_USAGE_PIXEL, + tex->stride * + tex->total_nblocksy); + + if (!tex->buffer) { + FREE(tex); + return NULL; + } + } + + return &tex->base; +} + + +static void +brw_texture_release_screen(struct pipe_screen *screen, + struct pipe_texture **pt) +{ + if (!*pt) + return; + + /* + DBG("%s %p refcount will be %d\n", + __FUNCTION__, (void *) *pt, (*pt)->refcount - 1); + */ + if (--(*pt)->refcount <= 0) { + struct pipe_winsys *ws = screen->winsys; + struct brw_texture *tex = (struct brw_texture *)*pt; + uint i; + + /* + DBG("%s deleting %p\n", __FUNCTION__, (void *) tex); + */ + + pipe_buffer_reference(ws, &tex->buffer, NULL); + + for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++) + if (tex->image_offset[i]) + free(tex->image_offset[i]); + + free(tex); + } + *pt = NULL; +} + + +static struct pipe_surface * +brw_get_tex_surface_screen(struct pipe_screen *screen, + struct pipe_texture *pt, + unsigned face, unsigned level, unsigned zslice) +{ + struct pipe_winsys *ws = screen->winsys; + struct brw_texture *tex = (struct brw_texture *)pt; + struct pipe_surface *ps; + unsigned offset; /* in bytes */ + + offset = tex->level_offset[level]; + + if (pt->target == PIPE_TEXTURE_CUBE) { + offset += tex->image_offset[level][face]; + } + else if (pt->target == PIPE_TEXTURE_3D) { + offset += tex->image_offset[level][zslice]; + } + else { + assert(face == 0); + assert(zslice == 0); + } + + ps = ws->surface_alloc(ws); + if (ps) { + assert(ps->format); + assert(ps->refcount); + pipe_buffer_reference(ws, &ps->buffer, tex->buffer); + ps->format = pt->format; + ps->width = pt->width[level]; + ps->height = pt->height[level]; + ps->block = pt->block; + ps->nblocksx = pt->nblocksx[level]; + ps->nblocksy = pt->nblocksy[level]; + ps->stride = tex->stride; + ps->offset = offset; + } + return ps; +} + + +void +brw_init_texture_functions(struct brw_context *brw) +{ +// brw->pipe.texture_update = brw_texture_update; +} + + +void +brw_init_screen_texture_funcs(struct pipe_screen *screen) +{ + screen->texture_create = brw_texture_create_screen; + screen->texture_release = brw_texture_release_screen; + screen->get_tex_surface = brw_get_tex_surface_screen; +} + |