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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_surface.h"
#include "state_tracker/st_context.h"
static INLINE struct xmesa_renderbuffer *
xmesa_rb(struct softpipe_surface *sps)
{
return (struct xmesa_renderbuffer *) sps->surface.rb;
}
/**
* quad reading/writing
* These functions are just wrappers around the existing renderbuffer
* functions.
*/
static void
read_quad_f(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rgba)[NUM_CHANNELS])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GLubyte temp[16];
GLfloat *dst = (GLfloat *) rgba;
GLuint i;
GET_CURRENT_CONTEXT(ctx);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y, temp);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y + 1, temp + 8);
for (i = 0; i < 16; i++) {
dst[i] = UBYTE_TO_FLOAT(temp[i]);
}
}
static void
read_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GLubyte temp[16];
GLfloat *dst = (GLfloat *) rrrr;
GLuint i, j;
GET_CURRENT_CONTEXT(ctx);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y, temp);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y + 1, temp + 8);
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
dst[j * 4 + i] = UBYTE_TO_FLOAT(temp[i * 4 + j]);
}
}
}
static void
write_quad_f(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rgba)[NUM_CHANNELS])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GLubyte temp[16];
const GLfloat *src = (const GLfloat *) rgba;
GLuint i;
GET_CURRENT_CONTEXT(ctx);
for (i = 0; i < 16; i++) {
UNCLAMPED_FLOAT_TO_UBYTE(temp[i], src[i]);
}
xrb->Base.PutRow(ctx, &xrb->Base, 2, x, y, temp, NULL);
xrb->Base.PutRow(ctx, &xrb->Base, 2, x, y + 1, temp + 8, NULL);
}
static void
write_quad_f_swz(struct softpipe_surface *sps, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GLubyte temp[16];
const GLfloat *src = (const GLfloat *) rrrr;
GLuint i, j;
GET_CURRENT_CONTEXT(ctx);
for (i = 0; i < 4; i++) {
for (j = 0; j < 4; j++) {
UNCLAMPED_FLOAT_TO_UBYTE(temp[j * 4 + i], src[i * 4 + j]);
}
}
xrb->Base.PutRow(ctx, &xrb->Base, 2, x, y, temp, NULL);
xrb->Base.PutRow(ctx, &xrb->Base, 2, x, y + 1, temp + 8, NULL);
}
static void
read_quad_ub(struct softpipe_surface *sps, GLint x, GLint y,
GLubyte (*rgba)[NUM_CHANNELS])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GET_CURRENT_CONTEXT(ctx);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y, rgba);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y + 1, rgba + 2);
}
static void
write_quad_ub(struct softpipe_surface *sps, GLint x, GLint y,
GLubyte (*rgba)[NUM_CHANNELS])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GET_CURRENT_CONTEXT(ctx);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y, rgba);
xrb->Base.GetRow(ctx, &xrb->Base, 2, x, y + 1, rgba + 2);
}
static void
write_mono_row_ub(struct softpipe_surface *sps, GLuint count, GLint x, GLint y,
GLubyte rgba[NUM_CHANNELS])
{
struct xmesa_renderbuffer *xrb = xmesa_rb(sps);
GET_CURRENT_CONTEXT(ctx);
xrb->Base.PutMonoRow(ctx, &xrb->Base, count, x, y, rgba, NULL);
}
/**
* 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_surface(GLcontext *ctx, struct xmesa_renderbuffer *xrb)
{
struct pipe_context *pipe = ctx->st->pipe;
struct softpipe_surface *sps;
sps = CALLOC_STRUCT(softpipe_surface);
if (!sps)
return NULL;
sps->surface.rb = xrb; /* XXX only needed for quad funcs above */
sps->surface.width = xrb->Base.Width;
sps->surface.height = xrb->Base.Height;
sps->read_quad_f = read_quad_f;
sps->read_quad_f_swz = read_quad_f_swz;
sps->read_quad_ub = read_quad_ub;
sps->write_quad_f = write_quad_f;
sps->write_quad_f_swz = write_quad_f_swz;
sps->write_quad_ub = write_quad_ub;
sps->write_mono_row_ub = write_mono_row_ub;
/* 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.
*/
sps->surface.region = pipe->region_alloc(pipe, 0, 0, 0);
return &sps->surface;
}
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