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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.h
* 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_state.h"
#include "pipe/softpipe/sp_context.h"
#include "pipe/softpipe/sp_surface.h"
/**
* An xm_surface is derived from a softpipe_surface
*/
struct xmesa_surface
{
struct softpipe_surface sps;
struct xmesa_renderbuffer *xrb; /** ptr back to matching xmesa_renderbuffer */
};
/**
* Cast wrapper
*/
static INLINE struct xmesa_surface *
xmesa_surface(struct softpipe_surface *sps)
{
return (struct xmesa_surface *) sps;
}
/**
* quad reading/writing
* These functions are just wrappers around the existing renderbuffer
* functions.
*/
static void
read_quad_f(struct softpipe_surface *gs, GLint x, GLint y,
GLfloat (*rgba)[NUM_CHANNELS])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
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 *gs, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
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 *gs, GLint x, GLint y,
GLfloat (*rgba)[NUM_CHANNELS])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
GLubyte temp[16];
const GLfloat *src = (const GLfloat *) rgba;
GLuint i;
GET_CURRENT_CONTEXT(ctx);
for (i = 0; i < 16; i++) {
temp[i] = FLOAT_TO_UBYTE(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 *gs, GLint x, GLint y,
GLfloat (*rrrr)[QUAD_SIZE])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
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++) {
temp[j * 4 + i] = FLOAT_TO_UBYTE(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 *gs, GLint x, GLint y,
GLubyte (*rgba)[NUM_CHANNELS])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
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 *gs, GLint x, GLint y,
GLubyte (*rgba)[NUM_CHANNELS])
{
struct xmesa_surface *xmsurf = xmesa_surface(gs);
struct xmesa_renderbuffer *xrb = xmsurf->xrb;
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 struct xmesa_surface *
create_surface(XMesaContext xmctx, struct xmesa_renderbuffer *xrb)
{
struct xmesa_surface *xmsurf;
xmsurf = CALLOC_STRUCT(xmesa_surface);
if (xmsurf) {
xmsurf->xrb = xrb;
xmsurf->sps.surface.width = xrb->Base.Width;
xmsurf->sps.surface.height = xrb->Base.Height;
xmsurf->sps.read_quad_f = read_quad_f;
xmsurf->sps.read_quad_f_swz = read_quad_f_swz;
xmsurf->sps.read_quad_ub = read_quad_ub;
xmsurf->sps.write_quad_f = write_quad_f;
xmsurf->sps.write_quad_f_swz = write_quad_f_swz;
xmsurf->sps.write_quad_ub = write_quad_ub;
#if 0
if (xrb->ximage) {
xmsurf->sps.surface.ptr = (GLubyte *) xrb->ximage->data;
xmsurf->sps.surface.stride = xrb->ximage->bytes_per_line;
xmsurf->sps.surface.cpp = xrb->ximage->depth;
}
#endif
}
return xmsurf;
}
static void
free_surface(struct softpipe_surface *sps)
{
/* XXX may need to do more in the future */
free(sps);
}
/**
* Return generic surface pointer corresponding to the current color buffer.
*/
struct pipe_surface *
xmesa_get_color_surface(GLcontext *ctx, GLuint buf)
{
XMesaContext xmctx = XMESA_CONTEXT(ctx);
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][buf];
struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
struct softpipe_surface *sps = (struct softpipe_surface *) xrb->pSurface;
if (!sps) {
xrb->pSurface = create_surface(xmctx, xrb);
}
else if (sps->surface.width != rb->Width ||
sps->surface.height != rb->Height) {
free_surface(sps);
xrb->pSurface = create_surface(xmctx, xrb);
}
return (struct pipe_surface *) xrb->pSurface;
}
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