/* * Mesa 3-D graphics library * Version: 7.1 * * Copyright (C) 1999-2007 Brian Paul 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 * BRIAN PAUL 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. */ /** * \file xm_surface.c * Code to allow the softpipe code to write to X windows/buffers. * This is a bit of a hack for now. We've basically got two different * abstractions for color buffers: gl_renderbuffer and softpipe_surface. * They'll need to get merged someday... * For now, they're separate things that point to each other. */ #include "glxheader.h" #include "GL/xmesa.h" #include "xmesaP.h" #include "context.h" #include "imports.h" #include "macros.h" #include "framebuffer.h" #include "renderbuffer.h" #include "pipe/p_context.h" #include "pipe/p_defines.h" #include "pipe/softpipe/sp_context.h" #include "pipe/softpipe/sp_clear.h" #include "pipe/softpipe/sp_tile_cache.h" #include "state_tracker/st_context.h" #define CLIP_TILE \ do { \ if (x + w > ps->width) \ w = ps->width - x; \ if (y + h > ps->height) \ h = ps->height -y; \ } while(0) static INLINE struct xmesa_surface * xmesa_surf(struct softpipe_surface *sps) { return (struct xmesa_surface *) sps; } static INLINE struct xmesa_renderbuffer * xmesa_rb(struct softpipe_surface *sps) { struct xmesa_surface *xms = xmesa_surf(sps); return xms->xrb; } #define FLIP(Y) Y = xrb->St.Base.Height - (Y) - 1; static void get_tile(struct pipe_surface *ps, uint x, uint y, uint w, uint h, float *p) { struct xmesa_renderbuffer *xrb = xmesa_rb((struct softpipe_surface *) ps); GLubyte tmp[MAX_WIDTH * 4]; GLuint i, j; uint w0 = w; GET_CURRENT_CONTEXT(ctx); CLIP_TILE; FLIP(y); for (i = 0; i < h; i++) { xrb->St.Base.GetRow(ctx, &xrb->St.Base, w, x, y - i, tmp); for (j = 0; j < w * 4; j++) { p[j] = UBYTE_TO_FLOAT(tmp[j]); } p += w0 * 4; } } static void put_tile(struct pipe_surface *ps, uint x, uint y, uint w, uint h, const float *p) { struct xmesa_renderbuffer *xrb = xmesa_rb((struct softpipe_surface *) ps); GLubyte tmp[MAX_WIDTH * 4]; GLuint i, j; uint w0 = w; GET_CURRENT_CONTEXT(ctx); CLIP_TILE; FLIP(y); for (i = 0; i < h; i++) { for (j = 0; j < w * 4; j++) { UNCLAMPED_FLOAT_TO_UBYTE(tmp[j], p[j]); } xrb->St.Base.PutRow(ctx, &xrb->St.Base, w, x, y - i, tmp, NULL); p += w0 * 4; } #if 0 /* debug: flush */ { XMesaContext xm = XMESA_CONTEXT(ctx); XSync(xm->display, 0); } #endif } /** * Called to create a pipe_surface for each X renderbuffer. * Note: this is being used instead of pipe->surface_alloc() since we * have special/unique quad read/write functions for X. */ struct pipe_surface * xmesa_new_color_surface(struct pipe_context *pipe, GLuint pipeFormat) { struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface); assert(pipeFormat); xms->surface.surface.format = pipeFormat; xms->surface.surface.refcount = 1; /* some of the functions plugged in by this call will get overridden */ softpipe_init_surface_funcs(&xms->surface); switch (pipeFormat) { case PIPE_FORMAT_U_A8_R8_G8_B8: xms->surface.surface.get_tile = get_tile; xms->surface.surface.put_tile = put_tile; break; case PIPE_FORMAT_S8_Z24: break; default: abort(); } /* Note, the region we allocate doesn't actually have any storage * since we're drawing into an XImage or Pixmap. * The region's size will get set in the xmesa_alloc_front/back_storage() * functions. */ if (pipe) xms->surface.surface.region = pipe->region_alloc(pipe, 1, 0, 0, 0x0); return &xms->surface.surface; } /** * Called via pipe->surface_alloc() to create new surfaces (textures, * renderbuffers, etc. */ struct pipe_surface * xmesa_surface_alloc(struct pipe_context *pipe, GLuint pipeFormat) { struct xmesa_surface *xms = CALLOC_STRUCT(xmesa_surface); assert(pipe); assert(pipeFormat); xms->surface.surface.format = pipeFormat; xms->surface.surface.refcount = 1; /* * This is really just a softpipe surface, not an XImage/Pixmap surface. */ softpipe_init_surface_funcs(&xms->surface); return &xms->surface.surface; } const GLuint * xmesa_supported_formats(struct pipe_context *pipe, GLuint *numFormats) { static const GLuint formats[] = { PIPE_FORMAT_U_A8_R8_G8_B8, PIPE_FORMAT_S_R16_G16_B16_A16, PIPE_FORMAT_S8_Z24 }; *numFormats = sizeof(formats) / sizeof(formats[0]); return formats; } /** * Called via pipe->clear() */ void xmesa_clear(struct pipe_context *pipe, struct pipe_surface *ps, GLuint value) { struct xmesa_renderbuffer *xrb = xmesa_rb((struct softpipe_surface *) ps); /* XXX actually, we should just discard any cached tiles from this * surface since we don't want to accidentally re-use them after clearing. */ pipe->flush(pipe, 0); { struct softpipe_context *sp = softpipe_context(pipe); struct softpipe_surface *sps = softpipe_surface(ps); if (sps == sp_tile_cache_get_surface(sp->cbuf_cache[0])) { float clear[4]; clear[0] = 0.2; /* XXX hack */ clear[1] = 0.2; clear[2] = 0.2; clear[3] = 0.2; sp_tile_cache_clear(sp->cbuf_cache[0], clear); } } if (xrb && xrb->ximage) { /* clearing back color buffer */ GET_CURRENT_CONTEXT(ctx); xmesa_clear_buffers(ctx, BUFFER_BIT_BACK_LEFT); } else if (xrb && xrb->pixmap) { /* clearing front color buffer */ GET_CURRENT_CONTEXT(ctx); xmesa_clear_buffers(ctx, BUFFER_BIT_FRONT_LEFT); } else { /* clearing other buffer */ softpipe_clear(pipe, ps, value); } }