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/*
* 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 "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);
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);
}
}
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