/********************************************************** * Copyright 2008-2009 VMware, Inc. All rights reserved. * * 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 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 AUTHORS OR COPYRIGHT HOLDERS * 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. * **********************************************************/ #include "svga_cmd.h" #include "pipe/p_state.h" #include "pipe/p_defines.h" #include "util/u_inlines.h" #include "os/os_thread.h" #include "util/u_bitmask.h" #include "util/u_format.h" #include "util/u_math.h" #include "util/u_memory.h" #include "svga_format.h" #include "svga_screen.h" #include "svga_context.h" #include "svga_sampler_view.h" #include "svga_resource_texture.h" #include "svga_surface.h" #include "svga_debug.h" static void svga_mark_surface_dirty(struct pipe_surface *surf); void svga_texture_copy_handle(struct svga_context *svga, struct svga_winsys_surface *src_handle, unsigned src_x, unsigned src_y, unsigned src_z, unsigned src_level, unsigned src_layer, struct svga_winsys_surface *dst_handle, unsigned dst_x, unsigned dst_y, unsigned dst_z, unsigned dst_level, unsigned dst_layer, unsigned width, unsigned height, unsigned depth) { struct svga_surface dst, src; enum pipe_error ret; SVGA3dCopyBox box, *boxes; assert(svga); src.handle = src_handle; src.real_level = src_level; src.real_layer = src_layer; src.real_zslice = 0; dst.handle = dst_handle; dst.real_level = dst_level; dst.real_layer = dst_layer; dst.real_zslice = 0; box.x = dst_x; box.y = dst_y; box.z = dst_z; box.w = width; box.h = height; box.d = depth; box.srcx = src_x; box.srcy = src_y; box.srcz = src_z; /* SVGA_DBG(DEBUG_VIEWS, "mipcopy src: %p %u (%ux%ux%u), dst: %p %u (%ux%ux%u)\n", src_handle, src_level, src_x, src_y, src_z, dst_handle, dst_level, dst_x, dst_y, dst_z); */ ret = SVGA3D_BeginSurfaceCopy(svga->swc, &src.base, &dst.base, &boxes, 1); if (ret != PIPE_OK) { svga_context_flush(svga, NULL); ret = SVGA3D_BeginSurfaceCopy(svga->swc, &src.base, &dst.base, &boxes, 1); assert(ret == PIPE_OK); } *boxes = box; SVGA_FIFOCommitAll(svga->swc); } /* A helper function to sync up the two surface handles. */ static void svga_texture_copy_handle_resource(struct svga_context *svga, struct svga_texture *src_tex, struct svga_winsys_surface *dst, unsigned int numMipLevels, unsigned int numLayers, int zslice_pick, unsigned int mipoffset, unsigned int layeroffset) { unsigned int i, j; unsigned int zoffset = 0; /* A negative zslice_pick implies zoffset at 0, and depth to copy is * from the depth of the texture at the particular mipmap level. */ if (zslice_pick >= 0) zoffset = zslice_pick; for (i = 0; i < numMipLevels; i++) { unsigned int miplevel = i + mipoffset; for (j = 0; j < numLayers; j++) { if (svga_is_texture_level_defined(src_tex, j+layeroffset, miplevel)) { unsigned depth = (zslice_pick < 0 ? u_minify(src_tex->b.b.depth0, miplevel) : 1); svga_texture_copy_handle(svga, src_tex->handle, 0, 0, zoffset, miplevel, j + layeroffset, dst, 0, 0, 0, i, j, u_minify(src_tex->b.b.width0, miplevel), u_minify(src_tex->b.b.height0, miplevel), depth); } } } } struct svga_winsys_surface * svga_texture_view_surface(struct svga_context *svga, struct svga_texture *tex, unsigned bind_flags, SVGA3dSurfaceFlags flags, SVGA3dSurfaceFormat format, unsigned start_mip, unsigned num_mip, int layer_pick, unsigned num_layers, int zslice_pick, boolean cacheable, struct svga_host_surface_cache_key *key) /* OUT */ { struct svga_screen *ss = svga_screen(svga->pipe.screen); struct svga_winsys_surface *handle = NULL; boolean validated; boolean needCopyResource; SVGA_DBG(DEBUG_PERF, "svga: Create surface view: layer %d zslice %d mips %d..%d\n", layer_pick, zslice_pick, start_mip, start_mip+num_mip-1); SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_EMULATESURFACEVIEW); key->flags = flags; key->format = format; key->numMipLevels = num_mip; key->size.width = u_minify(tex->b.b.width0, start_mip); key->size.height = u_minify(tex->b.b.height0, start_mip); key->size.depth = zslice_pick < 0 ? u_minify(tex->b.b.depth0, start_mip) : 1; key->cachable = 1; key->arraySize = 1; key->numFaces = 1; /* single sample surface can be treated as non-multisamples surface */ key->sampleCount = tex->b.b.nr_samples > 1 ? tex->b.b.nr_samples : 0; if (key->sampleCount > 1) { key->flags |= SVGA3D_SURFACE_MASKABLE_ANTIALIAS; } if (tex->b.b.target == PIPE_TEXTURE_CUBE && layer_pick < 0) { key->flags |= SVGA3D_SURFACE_CUBEMAP; key->numFaces = 6; } else if (tex->b.b.target == PIPE_TEXTURE_1D_ARRAY || tex->b.b.target == PIPE_TEXTURE_2D_ARRAY) { key->arraySize = num_layers; } if (key->format == SVGA3D_FORMAT_INVALID) { key->cachable = 0; goto done; } if (cacheable && tex->backed_handle && memcmp(key, &tex->backed_key, sizeof *key) == 0) { handle = tex->backed_handle; needCopyResource = tex->backed_age < tex->age; } else { SVGA_DBG(DEBUG_DMA, "surface_create for texture view\n"); handle = svga_screen_surface_create(ss, bind_flags, PIPE_USAGE_DEFAULT, &validated, key); needCopyResource = TRUE; if (cacheable && !tex->backed_handle) { tex->backed_handle = handle; memcpy(&tex->backed_key, key, sizeof *key); } } if (!handle) { key->cachable = 0; goto done; } SVGA_DBG(DEBUG_DMA, " --> got sid %p (texture view)\n", handle); if (layer_pick < 0) layer_pick = 0; if (needCopyResource) { svga_texture_copy_handle_resource(svga, tex, handle, key->numMipLevels, key->numFaces * key->arraySize, zslice_pick, start_mip, layer_pick); tex->backed_age = tex->age; } done: SVGA_STATS_TIME_POP(ss->sws); return handle; } /** * A helper function to create a surface view. * The view boolean flag specifies whether svga_texture_view_surface() * will be called to create a cloned surface and resource for the view. */ static struct pipe_surface * svga_create_surface_view(struct pipe_context *pipe, struct pipe_resource *pt, const struct pipe_surface *surf_tmpl, boolean view) { struct svga_context *svga = svga_context(pipe); struct svga_texture *tex = svga_texture(pt); struct pipe_screen *screen = pipe->screen; struct svga_screen *ss = svga_screen(screen); struct svga_surface *s; unsigned layer, zslice, bind; unsigned nlayers = 1; SVGA3dSurfaceFlags flags = 0; SVGA3dSurfaceFormat format; struct pipe_surface *retVal = NULL; s = CALLOC_STRUCT(svga_surface); if (!s) return NULL; SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_CREATESURFACEVIEW); if (pt->target == PIPE_TEXTURE_CUBE) { layer = surf_tmpl->u.tex.first_layer; zslice = 0; } else if (pt->target == PIPE_TEXTURE_1D_ARRAY || pt->target == PIPE_TEXTURE_2D_ARRAY) { layer = surf_tmpl->u.tex.first_layer; zslice = 0; nlayers = surf_tmpl->u.tex.last_layer - surf_tmpl->u.tex.first_layer + 1; } else { layer = 0; zslice = surf_tmpl->u.tex.first_layer; } pipe_reference_init(&s->base.reference, 1); pipe_resource_reference(&s->base.texture, pt); s->base.context = pipe; s->base.format = surf_tmpl->format; s->base.width = u_minify(pt->width0, surf_tmpl->u.tex.level); s->base.height = u_minify(pt->height0, surf_tmpl->u.tex.level); s->base.u.tex.level = surf_tmpl->u.tex.level; s->base.u.tex.first_layer = surf_tmpl->u.tex.first_layer; s->base.u.tex.last_layer = surf_tmpl->u.tex.last_layer; s->view_id = SVGA3D_INVALID_ID; s->backed = NULL; if (util_format_is_depth_or_stencil(surf_tmpl->format)) { flags = SVGA3D_SURFACE_HINT_DEPTHSTENCIL | SVGA3D_SURFACE_BIND_DEPTH_STENCIL; bind = PIPE_BIND_DEPTH_STENCIL; } else { flags = SVGA3D_SURFACE_HINT_RENDERTARGET | SVGA3D_SURFACE_BIND_RENDER_TARGET; bind = PIPE_BIND_RENDER_TARGET; } if (tex->imported) { /* imported resource (a window) */ format = tex->key.format; if (util_format_is_srgb(surf_tmpl->format)) { /* sRGB rendering to window */ format = svga_linear_to_srgb(format); } } else { format = svga_translate_format(ss, surf_tmpl->format, bind); } assert(format != SVGA3D_FORMAT_INVALID); if (view) { SVGA_DBG(DEBUG_VIEWS, "New backed surface view: resource %p, level %u layer %u z %u, %p\n", pt, surf_tmpl->u.tex.level, layer, zslice, s); if (svga_have_vgpu10(svga)) { switch (pt->target) { case PIPE_TEXTURE_1D: flags |= SVGA3D_SURFACE_1D; break; case PIPE_TEXTURE_1D_ARRAY: flags |= SVGA3D_SURFACE_1D | SVGA3D_SURFACE_ARRAY; break; case PIPE_TEXTURE_2D_ARRAY: flags |= SVGA3D_SURFACE_ARRAY; break; case PIPE_TEXTURE_3D: flags |= SVGA3D_SURFACE_VOLUME; break; case PIPE_TEXTURE_CUBE: if (nlayers == 6) flags |= SVGA3D_SURFACE_CUBEMAP; break; default: break; } } /* When we clone the surface view resource, use the format used in * the creation of the original resource. */ s->handle = svga_texture_view_surface(svga, tex, bind, flags, tex->key.format, surf_tmpl->u.tex.level, 1, layer, nlayers, zslice, TRUE, &s->key); if (!s->handle) { FREE(s); goto done; } s->key.format = format; s->real_layer = 0; s->real_level = 0; s->real_zslice = 0; } else { SVGA_DBG(DEBUG_VIEWS, "New surface view: resource %p, level %u, layer %u, z %u, %p\n", pt, surf_tmpl->u.tex.level, layer, zslice, s); memset(&s->key, 0, sizeof s->key); s->key.format = format; s->handle = tex->handle; s->real_layer = layer; s->real_zslice = zslice; s->real_level = surf_tmpl->u.tex.level; } svga->hud.num_surface_views++; retVal = &s->base; done: SVGA_STATS_TIME_POP(ss->sws); return retVal; } static struct pipe_surface * svga_create_surface(struct pipe_context *pipe, struct pipe_resource *pt, const struct pipe_surface *surf_tmpl) { struct svga_context *svga = svga_context(pipe); struct pipe_screen *screen = pipe->screen; struct pipe_surface *surf = NULL; boolean view = FALSE; SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_CREATESURFACE); if (svga_screen(screen)->debug.force_surface_view) view = TRUE; if (surf_tmpl->u.tex.level != 0 && svga_screen(screen)->debug.force_level_surface_view) view = TRUE; if (pt->target == PIPE_TEXTURE_3D) view = TRUE; if (svga_have_vgpu10(svga) || svga_screen(screen)->debug.no_surface_view) view = FALSE; surf = svga_create_surface_view(pipe, pt, surf_tmpl, view); SVGA_STATS_TIME_POP(svga_sws(svga)); return surf; } /** * Clone the surface view and its associated resource. */ static struct svga_surface * create_backed_surface_view(struct svga_context *svga, struct svga_surface *s) { struct svga_texture *tex = svga_texture(s->base.texture); if (!s->backed) { struct pipe_surface *backed_view; SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_CREATEBACKEDSURFACEVIEW); backed_view = svga_create_surface_view(&svga->pipe, &tex->b.b, &s->base, TRUE); if (!backed_view) goto done; s->backed = svga_surface(backed_view); } else if (s->backed->age < tex->age) { /* * There is already an existing backing surface, but we still need to * sync the backing resource if the original resource has been modified * since the last copy. */ struct svga_surface *bs = s->backed; unsigned int layer, zslice; assert(bs->handle); switch (tex->b.b.target) { case PIPE_TEXTURE_CUBE: case PIPE_TEXTURE_1D_ARRAY: case PIPE_TEXTURE_2D_ARRAY: layer = s->base.u.tex.first_layer; zslice = 0; break; default: layer = 0; zslice = s->base.u.tex.first_layer; } svga_texture_copy_handle_resource(svga, tex, bs->handle, bs->key.numMipLevels, bs->key.numFaces * bs->key.arraySize, zslice, s->base.u.tex.level, layer); svga_mark_surface_dirty(&s->backed->base); SVGA_STATS_TIME_POP(svga_sws(svga)); } s->backed->age = tex->age; done: return s->backed; } /** * Create a DX RenderTarget/DepthStencil View for the given surface, * if needed. */ struct pipe_surface * svga_validate_surface_view(struct svga_context *svga, struct svga_surface *s) { enum pipe_error ret = PIPE_OK; enum pipe_shader_type shader; assert(svga_have_vgpu10(svga)); assert(s); SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VALIDATESURFACEVIEW); /** * DX spec explicitly specifies that no resource can be bound to a render * target view and a shader resource view simultanously. * So first check if the resource bound to this surface view collides with * a sampler view. If so, then we will clone this surface view and its * associated resource. We will then use the cloned surface view for * render target. */ for (shader = PIPE_SHADER_VERTEX; shader <= PIPE_SHADER_GEOMETRY; shader++) { if (svga_check_sampler_view_resource_collision(svga, s->handle, shader)) { SVGA_DBG(DEBUG_VIEWS, "same resource used in shaderResource and renderTarget 0x%x\n", s->handle); s = create_backed_surface_view(svga, s); if (s) svga->state.hw_draw.has_backed_views = TRUE; /* s may be null here if the function failed */ break; } } if (s && s->view_id == SVGA3D_INVALID_ID) { SVGA3dResourceType resType; SVGA3dRenderTargetViewDesc desc; struct svga_texture *stex = svga_texture(s->base.texture); if (stex->validated == FALSE) { assert(stex->handle); /* We are about to render into a surface that has not been validated. * First invalidate the surface so that the device does not * need to update the host-side copy with the invalid * content when the associated mob is first bound to the surface. */ if (svga->swc->surface_invalidate(svga->swc, stex->handle) != PIPE_OK) { svga_context_flush(svga, NULL); ret = svga->swc->surface_invalidate(svga->swc, stex->handle); assert(ret == PIPE_OK); } stex->validated = TRUE; } desc.tex.mipSlice = s->real_level; desc.tex.firstArraySlice = s->real_layer + s->real_zslice; desc.tex.arraySize = s->base.u.tex.last_layer - s->base.u.tex.first_layer + 1; s->view_id = util_bitmask_add(svga->surface_view_id_bm); resType = svga_resource_type(s->base.texture->target); if (util_format_is_depth_or_stencil(s->base.format)) { ret = SVGA3D_vgpu10_DefineDepthStencilView(svga->swc, s->view_id, s->handle, s->key.format, resType, &desc); } else { SVGA3dSurfaceFormat view_format = s->key.format; const struct svga_texture *stex = svga_texture(s->base.texture); /* Can't create RGBA render target view of a RGBX surface so adjust * the view format. We do something similar for texture samplers in * svga_validate_pipe_sampler_view(). */ if (view_format == SVGA3D_B8G8R8A8_UNORM && (stex->key.format == SVGA3D_B8G8R8X8_UNORM || stex->key.format == SVGA3D_B8G8R8X8_TYPELESS)) { view_format = SVGA3D_B8G8R8X8_UNORM; } ret = SVGA3D_vgpu10_DefineRenderTargetView(svga->swc, s->view_id, s->handle, view_format, resType, &desc); } if (ret != PIPE_OK) { util_bitmask_clear(svga->surface_view_id_bm, s->view_id); s->view_id = SVGA3D_INVALID_ID; s = NULL; } } SVGA_STATS_TIME_POP(svga_sws(svga)); return s ? &s->base : NULL; } static void svga_surface_destroy(struct pipe_context *pipe, struct pipe_surface *surf) { struct svga_context *svga = svga_context(pipe); struct svga_surface *s = svga_surface(surf); struct svga_texture *t = svga_texture(surf->texture); struct svga_screen *ss = svga_screen(surf->texture->screen); enum pipe_error ret = PIPE_OK; SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_DESTROYSURFACE); /* Destroy the backed view surface if it exists */ if (s->backed) { svga_surface_destroy(pipe, &s->backed->base); s->backed = NULL; } /* Destroy the surface handle if this is a backed handle and * it is not being cached in the texture. */ if (s->handle != t->handle && s->handle != t->backed_handle) { SVGA_DBG(DEBUG_DMA, "unref sid %p (tex surface)\n", s->handle); svga_screen_surface_destroy(ss, &s->key, &s->handle); } if (s->view_id != SVGA3D_INVALID_ID) { unsigned try; /* The SVGA3D device will generate a device error if the * render target view or depth stencil view is destroyed from * a context other than the one it was created with. * Similar to shader resource view, in this case, we will skip * the destroy for now. */ if (surf->context != pipe) { _debug_printf("context mismatch in %s\n", __func__); } else { assert(svga_have_vgpu10(svga)); for (try = 0; try < 2; try++) { if (util_format_is_depth_or_stencil(s->base.format)) { ret = SVGA3D_vgpu10_DestroyDepthStencilView(svga->swc, s->view_id); } else { ret = SVGA3D_vgpu10_DestroyRenderTargetView(svga->swc, s->view_id); } if (ret == PIPE_OK) break; svga_context_flush(svga, NULL); } assert(ret == PIPE_OK); util_bitmask_clear(svga->surface_view_id_bm, s->view_id); } } pipe_resource_reference(&surf->texture, NULL); FREE(surf); svga->hud.num_surface_views--; SVGA_STATS_TIME_POP(ss->sws); } static void svga_mark_surface_dirty(struct pipe_surface *surf) { struct svga_surface *s = svga_surface(surf); struct svga_texture *tex = svga_texture(surf->texture); if (!s->dirty) { s->dirty = TRUE; if (s->handle == tex->handle) { /* hmm so 3d textures always have all their slices marked ? */ svga_define_texture_level(tex, surf->u.tex.first_layer, surf->u.tex.level); } else { /* this will happen later in svga_propagate_surface */ } } /* Increment the view_age and texture age for this surface's mipmap * level so that any sampler views into the texture are re-validated too. * Note: we age the texture for backed surface view only when the * backed surface is propagated to the original surface. */ if (s->handle == tex->handle) svga_age_texture_view(tex, surf->u.tex.level); } void svga_mark_surfaces_dirty(struct svga_context *svga) { unsigned i; struct svga_hw_clear_state *hw = &svga->state.hw_clear; if (svga_have_vgpu10(svga)) { /* For VGPU10, mark the dirty bit in the rendertarget/depth stencil view surface. * This surface can be the backed surface. */ for (i = 0; i < hw->num_rendertargets; i++) { if (hw->rtv[i]) svga_mark_surface_dirty(hw->rtv[i]); } if (hw->dsv) svga_mark_surface_dirty(hw->dsv); } else { for (i = 0; i < svga->curr.framebuffer.nr_cbufs; i++) { if (svga->curr.framebuffer.cbufs[i]) svga_mark_surface_dirty(svga->curr.framebuffer.cbufs[i]); } if (svga->curr.framebuffer.zsbuf) svga_mark_surface_dirty(svga->curr.framebuffer.zsbuf); } } /** * Progagate any changes from surfaces to texture. * pipe is optional context to inline the blit command in. */ void svga_propagate_surface(struct svga_context *svga, struct pipe_surface *surf, boolean reset) { struct svga_surface *s = svga_surface(surf); struct svga_texture *tex = svga_texture(surf->texture); struct svga_screen *ss = svga_screen(surf->texture->screen); if (!s->dirty) return; SVGA_STATS_TIME_PUSH(ss->sws, SVGA_STATS_TIME_PROPAGATESURFACE); /* Reset the dirty flag if specified. This is to ensure that * the dirty flag will not be reset and stay unset when the backing * surface is still being bound and rendered to. * The reset flag will be set to TRUE when the surface is propagated * and will be unbound. */ s->dirty = !reset; ss->texture_timestamp++; svga_age_texture_view(tex, surf->u.tex.level); if (s->handle != tex->handle) { unsigned zslice, layer; unsigned nlayers = 1; unsigned i; if (surf->texture->target == PIPE_TEXTURE_CUBE) { zslice = 0; layer = surf->u.tex.first_layer; } else if (surf->texture->target == PIPE_TEXTURE_1D_ARRAY || surf->texture->target == PIPE_TEXTURE_2D_ARRAY) { zslice = 0; layer = surf->u.tex.first_layer; nlayers = surf->u.tex.last_layer - surf->u.tex.first_layer + 1; } else { zslice = surf->u.tex.first_layer; layer = 0; } SVGA_DBG(DEBUG_VIEWS, "Propagate surface %p to resource %p, level %u\n", surf, tex, surf->u.tex.level); for (i = 0; i < nlayers; i++) { svga_texture_copy_handle(svga, s->handle, 0, 0, 0, s->real_level, s->real_layer + i, tex->handle, 0, 0, zslice, surf->u.tex.level, layer + i, u_minify(tex->b.b.width0, surf->u.tex.level), u_minify(tex->b.b.height0, surf->u.tex.level), 1); svga_define_texture_level(tex, layer + i, surf->u.tex.level); } /* Sync the surface view age with the texture age */ s->age = tex->age; /* If this backed surface is cached in the texture, * update the backed age as well. */ if (tex->backed_handle == s->handle) { tex->backed_age = tex->age; } } SVGA_STATS_TIME_POP(ss->sws); } /** * If any of the render targets are in backing texture views, propagate any * changes to them back to the original texture. */ void svga_propagate_rendertargets(struct svga_context *svga) { unsigned i; /* Early exit if there is no backing texture views in use */ if (!svga->state.hw_draw.has_backed_views) return; /* Note that we examine the svga->state.hw_draw.framebuffer surfaces, * not the svga->curr.framebuffer surfaces, because it's the former * surfaces which may be backing surface views (the actual render targets). */ for (i = 0; i < svga->state.hw_clear.num_rendertargets; i++) { struct pipe_surface *s = svga->state.hw_clear.rtv[i]; if (s) { svga_propagate_surface(svga, s, FALSE); } } if (svga->state.hw_clear.dsv) { svga_propagate_surface(svga, svga->state.hw_clear.dsv, FALSE); } } /** * Check if we should call svga_propagate_surface on the surface. */ boolean svga_surface_needs_propagation(const struct pipe_surface *surf) { const struct svga_surface *s = svga_surface_const(surf); struct svga_texture *tex = svga_texture(surf->texture); return s->dirty && s->handle != tex->handle; } static void svga_get_sample_position(struct pipe_context *context, unsigned sample_count, unsigned sample_index, float *pos_out) { /* We can't actually query the device to learn the sample positions. * These were grabbed from nvidia's driver. */ static const float pos1[1][2] = { { 0.5, 0.5 } }; static const float pos4[4][2] = { { 0.375000, 0.125000 }, { 0.875000, 0.375000 }, { 0.125000, 0.625000 }, { 0.625000, 0.875000 } }; static const float pos8[8][2] = { { 0.562500, 0.312500 }, { 0.437500, 0.687500 }, { 0.812500, 0.562500 }, { 0.312500, 0.187500 }, { 0.187500, 0.812500 }, { 0.062500, 0.437500 }, { 0.687500, 0.937500 }, { 0.937500, 0.062500 } }; static const float pos16[16][2] = { { 0.187500, 0.062500 }, { 0.437500, 0.187500 }, { 0.062500, 0.312500 }, { 0.312500, 0.437500 }, { 0.687500, 0.062500 }, { 0.937500, 0.187500 }, { 0.562500, 0.312500 }, { 0.812500, 0.437500 }, { 0.187500, 0.562500 }, { 0.437500, 0.687500 }, { 0.062500, 0.812500 }, { 0.312500, 0.937500 }, { 0.687500, 0.562500 }, { 0.937500, 0.687500 }, { 0.562500, 0.812500 }, { 0.812500, 0.937500 } }; const float (*positions)[2]; switch (sample_count) { case 4: positions = pos4; break; case 8: positions = pos8; break; case 16: positions = pos16; break; default: positions = pos1; } pos_out[0] = positions[sample_index][0]; pos_out[1] = positions[sample_index][1]; } void svga_init_surface_functions(struct svga_context *svga) { svga->pipe.create_surface = svga_create_surface; svga->pipe.surface_destroy = svga_surface_destroy; svga->pipe.get_sample_position = svga_get_sample_position; }