/*
* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2010 George Sapountzis <gsapountzis@gmail.com>
*
* 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 drisw_util.c
*
* DRISW utility functions, i.e. dri_util.c stripped from drm-specific bits.
*/
#include "dri_util.h"
#include "utils.h"
/**
* Screen functions
*/
static void
setupLoaderExtensions(__DRIscreen *psp,
const __DRIextension **extensions)
{
int i;
for (i = 0; extensions[i]; i++) {
if (strcmp(extensions[i]->name, __DRI_SWRAST_LOADER) == 0)
psp->swrast_loader = (__DRIswrastLoaderExtension *) extensions[i];
}
}
static __DRIscreen *
driCreateNewScreen(int scrn, const __DRIextension **extensions,
const __DRIconfig ***driver_configs, void *data)
{
static const __DRIextension *emptyExtensionList[] = { NULL };
__DRIscreen *psp;
psp = CALLOC_STRUCT(__DRIscreenRec);
if (!psp)
return NULL;
setupLoaderExtensions(psp, extensions);
psp->loaderPrivate = data;
psp->extensions = emptyExtensionList;
psp->fd = -1;
psp->myNum = scrn;
*driver_configs = driDriverAPI.InitScreen(psp);
if (*driver_configs == NULL) {
FREE(psp);
return NULL;
}
return psp;
}
static void driDestroyScreen(__DRIscreen *psp)
{
if (psp) {
driDriverAPI.DestroyScreen(psp);
FREE(psp);
}
}
static const __DRIextension **driGetExtensions(__DRIscreen *psp)
{
return psp->extensions;
}
/**
* Context functions
*/
static __DRIcontext *
driCreateContextAttribs(__DRIscreen *screen, int api,
const __DRIconfig *config,
__DRIcontext *shared,
unsigned num_attribs,
const uint32_t *attribs,
unsigned *error,
void *data)
{
__DRIcontext *pcp;
const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
void * const shareCtx = (shared != NULL) ? shared->driverPrivate : NULL;
gl_api mesa_api;
unsigned major_version = 1;
unsigned minor_version = 0;
uint32_t flags = 0;
/* Either num_attribs is zero and attribs is NULL, or num_attribs is not
* zero and attribs is not NULL.
*/
assert((num_attribs == 0) == (attribs == NULL));
switch (api) {
case __DRI_API_OPENGL:
mesa_api = API_OPENGL;
break;
case __DRI_API_GLES:
mesa_api = API_OPENGLES;
break;
case __DRI_API_GLES2:
mesa_api = API_OPENGLES2;
break;
case __DRI_API_OPENGL_CORE:
default:
return NULL;
}
for (unsigned i = 0; i < num_attribs; i++) {
switch (attribs[i * 2]) {
case __DRI_CTX_ATTRIB_MAJOR_VERSION:
major_version = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_MINOR_VERSION:
minor_version = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_FLAGS:
flags = attribs[i * 2 + 1];
break;
default:
/* We can't create a context that satisfies the requirements of an
* attribute that we don't understand. Return failure.
*/
return NULL;
}
}
/* There are no forward-compatible contexts before OpenGL 3.0. The
* GLX_ARB_create_context spec says:
*
* "Forward-compatible contexts are defined only for OpenGL versions
* 3.0 and later."
*
* Moreover, Mesa can't fulfill the requirements of a forward-looking
* context. Return failure if a forward-looking context is requested.
*
* In Mesa, a debug context is the same as a regular context.
*/
if (major_version >= 3) {
if ((flags & ~__DRI_CTX_FLAG_DEBUG) != 0)
return NULL;
}
pcp = CALLOC_STRUCT(__DRIcontextRec);
if (!pcp)
return NULL;
pcp->loaderPrivate = data;
pcp->driScreenPriv = screen;
pcp->driDrawablePriv = NULL;
pcp->driReadablePriv = NULL;
if (!driDriverAPI.CreateContext(mesa_api, modes, pcp,
major_version, minor_version,
flags, error, shareCtx)) {
FREE(pcp);
return NULL;
}
return pcp;
}
static __DRIcontext *
driCreateNewContextForAPI(__DRIscreen *psp, int api,
const __DRIconfig *config,
__DRIcontext *shared, void *data)
{
unsigned error;
return driCreateContextAttribs(psp, api, config, shared, 0, NULL,
&error, data);
}
static __DRIcontext *
driCreateNewContext(__DRIscreen *psp, const __DRIconfig *config,
__DRIcontext *shared, void *data)
{
return driCreateNewContextForAPI(psp, __DRI_API_OPENGL,
config, shared, data);
}
static void
driDestroyContext(__DRIcontext *pcp)
{
if (pcp) {
driDriverAPI.DestroyContext(pcp);
FREE(pcp);
}
}
static int
driCopyContext(__DRIcontext *dst, __DRIcontext *src, unsigned long mask)
{
return GL_FALSE;
}
static void dri_get_drawable(__DRIdrawable *pdp);
static void dri_put_drawable(__DRIdrawable *pdp);
static int driBindContext(__DRIcontext *pcp,
__DRIdrawable *pdp,
__DRIdrawable *prp)
{
/* Bind the drawable to the context */
if (pcp) {
pcp->driDrawablePriv = pdp;
pcp->driReadablePriv = prp;
if (pdp) {
pdp->driContextPriv = pcp;
dri_get_drawable(pdp);
}
if (prp && pdp != prp) {
dri_get_drawable(prp);
}
}
return driDriverAPI.MakeCurrent(pcp, pdp, prp);
}
static int driUnbindContext(__DRIcontext *pcp)
{
__DRIdrawable *pdp;
__DRIdrawable *prp;
if (pcp == NULL)
return GL_FALSE;
pdp = pcp->driDrawablePriv;
prp = pcp->driReadablePriv;
/* already unbound */
if (!pdp && !prp)
return GL_TRUE;
driDriverAPI.UnbindContext(pcp);
dri_put_drawable(pdp);
if (prp != pdp) {
dri_put_drawable(prp);
}
pcp->driDrawablePriv = NULL;
pcp->driReadablePriv = NULL;
return GL_TRUE;
}
/**
* Drawable functions
*/
static void dri_get_drawable(__DRIdrawable *pdp)
{
pdp->refcount++;
}
static void dri_put_drawable(__DRIdrawable *pdp)
{
if (pdp) {
pdp->refcount--;
if (pdp->refcount)
return;
driDriverAPI.DestroyBuffer(pdp);
FREE(pdp);
}
}
static __DRIdrawable *
driCreateNewDrawable(__DRIscreen *psp,
const __DRIconfig *config, void *data)
{
__DRIdrawable *pdp;
pdp = CALLOC_STRUCT(__DRIdrawableRec);
if (!pdp)
return NULL;
pdp->loaderPrivate = data;
pdp->driScreenPriv = psp;
pdp->driContextPriv = NULL;
dri_get_drawable(pdp);
if (!driDriverAPI.CreateBuffer(psp, pdp, &config->modes, GL_FALSE)) {
FREE(pdp);
return NULL;
}
pdp->lastStamp = 1; /* const */
return pdp;
}
static void
driDestroyDrawable(__DRIdrawable *pdp)
{
dri_put_drawable(pdp);
}
static void driSwapBuffers(__DRIdrawable *pdp)
{
driDriverAPI.SwapBuffers(pdp);
}
const __DRIcoreExtension driCoreExtension = {
{ __DRI_CORE, __DRI_CORE_VERSION },
NULL, /* driCreateNewScreen */
driDestroyScreen,
driGetExtensions,
driGetConfigAttrib,
driIndexConfigAttrib,
NULL, /* driCreateNewDrawable */
driDestroyDrawable,
driSwapBuffers,
driCreateNewContext,
driCopyContext,
driDestroyContext,
driBindContext,
driUnbindContext
};
const __DRIswrastExtension driSWRastExtension = {
{ __DRI_SWRAST, __DRI_SWRAST_VERSION },
driCreateNewScreen,
driCreateNewDrawable,
driCreateNewContextForAPI,
driCreateContextAttribs
};