diff options
Diffstat (limited to 'src/gallium/state_trackers/dri/sw/drisw.c')
| -rw-r--r-- | src/gallium/state_trackers/dri/sw/drisw.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/src/gallium/state_trackers/dri/sw/drisw.c b/src/gallium/state_trackers/dri/sw/drisw.c new file mode 100644 index 00000000000..73bc45d9060 --- /dev/null +++ b/src/gallium/state_trackers/dri/sw/drisw.c @@ -0,0 +1,318 @@ +/************************************************************************** + * + * Copyright 2009, VMware, Inc. + * All Rights Reserved. + * Copyright 2010 George Sapountzis <[email protected]> + * + * 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, sub license, 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE 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. + * + **************************************************************************/ + +/* TODO: + * + * stride: + * + * The driver and the loaders (libGL, xserver/glx) compute the stride from the + * width independently. winsys has a workaround that works for softpipe but may + * explode for other drivers or platforms, rendering- or performance-wise. + * Solving this issue properly requires extending the DRISW loader extension, + * in order to make the stride available to the putImage callback. + * + * drisw_api: + * + * Define drisw_api similarly to dri_api and use it to call the loader. This is + * predicated on support for calling the loader from the winsys, which has to + * grow for DRI2 as well. + * + * xshm: + * + * Allow the loaders to use the XSHM extension. It probably requires callbacks + * for createImage/destroyImage similar to DRI2 getBuffers. Probably not worth + * it, given the scope of DRISW, unless it falls naturally from properly + * solving the above two issues. + * + * swrast_create_screen: + * + * Allow for any software renderer to be used. Factor out the code from + * targets/libgl-xlib/xlib.c, put it in targets/common or winsys/sw/common and + * use it in all software targets. + */ + +#include "util/u_memory.h" +#include "util/u_inlines.h" +#include "pipe/p_context.h" +#include "state_tracker/drm_api.h" + +#include "dri_screen.h" +#include "dri_context.h" +#include "dri_drawable.h" +#include "dri_st_api.h" +#include "dri1_helper.h" +#include "drisw.h" + + +static INLINE void +get_drawable_info(__DRIdrawable *dPriv, int *w, int *h) +{ + __DRIscreen *sPriv = dPriv->driScreenPriv; + const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader; + int x, y; + + loader->getDrawableInfo(dPriv, + &x, &y, w, h, + dPriv->loaderPrivate); +} + +static INLINE void +put_image(__DRIdrawable *dPriv, void *data) +{ + __DRIscreen *sPriv = dPriv->driScreenPriv; + const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader; + + loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP, + 0, 0, dPriv->w, dPriv->h, + data, dPriv->loaderPrivate); +} + +void +drisw_update_drawable_info(__DRIdrawable *dPriv) +{ + get_drawable_info(dPriv, &dPriv->w, &dPriv->h); +} + +static INLINE void +drisw_present_texture(__DRIdrawable *dPriv, + struct pipe_texture *ptex) +{ + struct dri_drawable *drawable = dri_drawable(dPriv); + struct dri_screen *screen = dri_screen(drawable->sPriv); + struct pipe_context *pipe; + struct pipe_surface *psurf; + struct pipe_transfer *ptrans; + void *pmap; + + pipe = dri1_get_pipe_context(screen); + psurf = dri1_get_pipe_surface(drawable, ptex); + if (!pipe || !psurf) + return; + + ptrans = pipe->get_tex_transfer(pipe, ptex, 0, 0, 0, + PIPE_TRANSFER_READ, + 0, 0, dPriv->w, dPriv->h); + + pmap = pipe->transfer_map(pipe, ptrans); + + assert(pmap); + + put_image(dPriv, pmap); + + pipe->transfer_unmap(pipe, ptrans); + + pipe->tex_transfer_destroy(pipe, ptrans); +} + +static INLINE void +drisw_invalidate_drawable(__DRIdrawable *dPriv) +{ + struct dri_context *ctx = dri_get_current(); + struct dri_drawable *drawable = dri_drawable(dPriv); + + drawable->texture_stamp = dPriv->lastStamp - 1; + + /* check if swapping currently bound buffer */ + if (ctx && ctx->dPriv == dPriv) + ctx->st->notify_invalid_framebuffer(ctx->st, drawable->stfb); +} + +static INLINE void +drisw_copy_to_front(__DRIdrawable * dPriv, + struct pipe_texture *ptex) +{ + drisw_present_texture(dPriv, ptex); + + drisw_invalidate_drawable(dPriv); +} + +/* + * Backend functions for st_framebuffer interface and swap_buffers. + */ + +void +drisw_flush_frontbuffer(struct dri_drawable *drawable, + enum st_attachment_type statt) +{ + struct dri_context *ctx = dri_get_current(); + struct pipe_texture *ptex; + + if (!ctx) + return; + + ptex = drawable->textures[statt]; + + if (ptex) { + drisw_copy_to_front(ctx->dPriv, ptex); + } +} + +void +drisw_swap_buffers(__DRIdrawable *dPriv) +{ + struct dri_context *ctx = dri_get_current(); + struct dri_drawable *drawable = dri_drawable(dPriv); + struct pipe_texture *ptex; + + if (!ctx) + return; + + ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT]; + + if (ptex) { + ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL); + + drisw_copy_to_front(dPriv, ptex); + } +} + +/** + * Allocate framebuffer attachments. + * + * During fixed-size operation, the function keeps allocating new attachments + * as they are requested. Unused attachments are not removed, not until the + * framebuffer is resized or destroyed. + * + * It should be possible for DRI1 and DRISW to share this function, but it + * seems a better seperation and safer for each DRI version to provide its own + * function. + */ +void +drisw_allocate_textures(struct dri_drawable *drawable, + unsigned mask) +{ + struct dri_screen *screen = dri_screen(drawable->sPriv); + struct pipe_texture templ; + unsigned width, height; + boolean resized; + int i; + + width = drawable->dPriv->w; + height = drawable->dPriv->h; + + resized = (drawable->old_w != width || + drawable->old_h != height); + + /* remove outdated textures */ + if (resized) { + for (i = 0; i < ST_ATTACHMENT_COUNT; i++) + pipe_texture_reference(&drawable->textures[i], NULL); + } + + memset(&templ, 0, sizeof(templ)); + templ.target = PIPE_TEXTURE_2D; + templ.width0 = width; + templ.height0 = height; + templ.depth0 = 1; + templ.last_level = 0; + + for (i = 0; i < ST_ATTACHMENT_COUNT; i++) { + enum pipe_format format; + unsigned tex_usage; + + /* the texture already exists or not requested */ + if (drawable->textures[i] || !(mask & (1 << i))) { + continue; + } + + switch (i) { + case ST_ATTACHMENT_FRONT_LEFT: + case ST_ATTACHMENT_BACK_LEFT: + case ST_ATTACHMENT_FRONT_RIGHT: + case ST_ATTACHMENT_BACK_RIGHT: + format = drawable->stvis.color_format; + tex_usage = PIPE_TEXTURE_USAGE_DISPLAY_TARGET | + PIPE_TEXTURE_USAGE_RENDER_TARGET; + break; + case ST_ATTACHMENT_DEPTH_STENCIL: + format = drawable->stvis.depth_stencil_format; + tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL; + break; + default: + format = PIPE_FORMAT_NONE; + break; + } + + if (format != PIPE_FORMAT_NONE) { + templ.format = format; + templ.tex_usage = tex_usage; + + drawable->textures[i] = + screen->pipe_screen->texture_create(screen->pipe_screen, &templ); + } + } + + drawable->old_w = width; + drawable->old_h = height; +} + +/* + * Backend function for init_screen. + */ + +static const __DRIextension *drisw_screen_extensions[] = { + NULL +}; + +const __DRIconfig ** +drisw_init_screen(__DRIscreen * sPriv) +{ + struct dri_screen *screen; + struct drm_create_screen_arg arg; + + screen = CALLOC_STRUCT(dri_screen); + if (!screen) + return NULL; + + screen->api = drm_api_create(); + screen->sPriv = sPriv; + screen->fd = -1; + sPriv->private = (void *)screen; + sPriv->extensions = drisw_screen_extensions; + arg.mode = DRM_CREATE_DRISW; + + screen->pipe_screen = screen->api->create_screen(screen->api, -1, &arg); + if (!screen->pipe_screen) { + debug_printf("%s: failed to create pipe_screen\n", __FUNCTION__); + goto fail; + } + + screen->smapi = dri_create_st_manager(screen); + if (!screen->smapi) + goto fail; + + driParseOptionInfo(&screen->optionCache, + __driConfigOptions, __driNConfigOptions); + + return dri_fill_in_modes(screen, 32); +fail: + dri_destroy_screen(sPriv); + return NULL; +} + +/* vim: set sw=3 ts=8 sts=3 expandtab: */ |