/*
* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright © 2008 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Soft-
* ware"), to deal in the Software without restriction, including without
* limitation the rights to use, copy, modify, merge, publish, distribute,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, provided that the above copyright
* notice(s) and this permission notice appear in all copies of the Soft-
* ware and that both the above copyright notice(s) and this permission
* notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
* ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
* RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
* THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
* QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
* MANCE OF THIS SOFTWARE.
*
* Except as contained in this notice, the name of a copyright holder shall
* not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization of
* the copyright holder.
*
* Authors:
* Kevin E. Martin <kevin@precisioninsight.com>
* Brian Paul <brian@precisioninsight.com>
* Kristian Høgsberg (krh@redhat.com)
*/
#if defined(GLX_DIRECT_RENDERING) && !defined(GLX_USE_APPLEGL)
#include <unistd.h>
#include <dlfcn.h>
#include <stdarg.h>
#include "glxclient.h"
#include "dri_common.h"
#include "loader.h"
#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
_X_HIDDEN void
dri_message(int level, const char *f, ...)
{
va_list args;
int threshold = _LOADER_WARNING;
const char *libgl_debug;
libgl_debug
= getenv("LIBGL_DEBUG"); if (libgl_debug) {
if (strstr(libgl_debug
, "quiet")) threshold = _LOADER_FATAL;
else if (strstr(libgl_debug
, "verbose")) threshold = _LOADER_DEBUG;
}
/* Note that the _LOADER_* levels are lower numbers for more severe. */
if (level <= threshold) {
fprintf(stderr
, "libGL%s: ", level
<= _LOADER_WARNING
? " error" : ""); }
}
#ifndef DEFAULT_DRIVER_DIR
/* this is normally defined in Mesa/configs/default with DRI_DRIVER_SEARCH_PATH */
#define DEFAULT_DRIVER_DIR "/usr/local/lib/dri"
#endif
/**
* Try to \c dlopen the named driver.
*
* This function adds the "_dri.so" suffix to the driver name and searches the
* directories specified by the \c LIBGL_DRIVERS_PATH environment variable in
* order to find the driver.
*
* \param driverName - a name like "i965", "radeon", "nouveau", etc.
*
* \returns
* A handle from \c dlopen, or \c NULL if driver file not found.
*/
_X_HIDDEN void *
driOpenDriver(const char *driverName)
{
void *glhandle, *handle;
const char *libPaths, *p, *next;
char realDriverName[200];
int len;
/* Attempt to make sure libGL symbols will be visible to the driver */
glhandle = dlopen("libGL.so.1", RTLD_NOW | RTLD_GLOBAL);
libPaths = NULL;
if (geteuid() == getuid()) {
/* don't allow setuid apps to use LIBGL_DRIVERS_PATH */
libPaths
= getenv("LIBGL_DRIVERS_PATH"); if (!libPaths)
libPaths
= getenv("LIBGL_DRIVERS_DIR"); /* deprecated */ }
if (libPaths == NULL)
libPaths = DEFAULT_DRIVER_DIR;
handle = NULL;
for (p = libPaths; *p; p = next) {
if (next == NULL) {
next = p + len;
}
else {
len = next - p;
next++;
}
#ifdef GLX_USE_TLS
snprintf(realDriverName
, sizeof realDriverName
, "%.*s/tls/%s_dri.so", len, p, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
#endif
if (handle == NULL) {
snprintf(realDriverName
, sizeof realDriverName
, "%.*s/%s_dri.so", len, p, driverName);
InfoMessageF("OpenDriver: trying %s\n", realDriverName);
handle = dlopen(realDriverName, RTLD_NOW | RTLD_GLOBAL);
}
if (handle != NULL)
break;
else
InfoMessageF("dlopen %s failed (%s)\n", realDriverName, dlerror());
}
if (!handle)
ErrorMessageF("unable to load driver: %s_dri.so\n", driverName);
if (glhandle)
dlclose(glhandle);
return handle;
}
_X_HIDDEN const __DRIextension **
driGetDriverExtensions(void *handle, const char *driver_name)
{
const __DRIextension **extensions = NULL;
const __DRIextension **(*get_extensions)(void);
char *get_extensions_name;
if (asprintf(&get_extensions_name, "%s_%s",
__DRI_DRIVER_GET_EXTENSIONS, driver_name) != -1) {
get_extensions = dlsym(handle, get_extensions_name);
if (get_extensions) {
free(get_extensions_name
); return get_extensions();
} else {
InfoMessageF("driver does not expose %s(): %s\n",
get_extensions_name, dlerror());
free(get_extensions_name
); }
}
extensions = dlsym(handle, __DRI_DRIVER_EXTENSIONS);
if (extensions == NULL) {
ErrorMessageF("driver exports no extensions (%s)\n", dlerror());
return NULL;
}
return extensions;
}
static GLboolean
__driGetMSCRate(__DRIdrawable *draw,
int32_t * numerator, int32_t * denominator,
void *loaderPrivate)
{
__GLXDRIdrawable *glxDraw = loaderPrivate;
return __glxGetMscRate(glxDraw->psc, numerator, denominator);
}
_X_HIDDEN const __DRIsystemTimeExtension systemTimeExtension = {
.base = {__DRI_SYSTEM_TIME, 1 },
.getUST = __glXGetUST,
.getMSCRate = __driGetMSCRate
};
#define __ATTRIB(attrib, field) \
{ attrib, offsetof(struct glx_config, field) }
static const struct
{
unsigned int attrib, offset;
} attribMap[] = {
__ATTRIB(__DRI_ATTRIB_BUFFER_SIZE, rgbBits),
__ATTRIB(__DRI_ATTRIB_LEVEL, level),
__ATTRIB(__DRI_ATTRIB_RED_SIZE, redBits),
__ATTRIB(__DRI_ATTRIB_GREEN_SIZE, greenBits),
__ATTRIB(__DRI_ATTRIB_BLUE_SIZE, blueBits),
__ATTRIB(__DRI_ATTRIB_ALPHA_SIZE, alphaBits),
__ATTRIB(__DRI_ATTRIB_DEPTH_SIZE, depthBits),
__ATTRIB(__DRI_ATTRIB_STENCIL_SIZE, stencilBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits),
__ATTRIB(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits),
__ATTRIB(__DRI_ATTRIB_SAMPLE_BUFFERS, sampleBuffers),
__ATTRIB(__DRI_ATTRIB_SAMPLES, samples),
__ATTRIB(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode),
__ATTRIB(__DRI_ATTRIB_STEREO, stereoMode),
__ATTRIB(__DRI_ATTRIB_AUX_BUFFERS, numAuxBuffers),
#if 0
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_TYPE, transparentPixel),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_INDEX_VALUE, transparentIndex),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_RED_VALUE, transparentRed),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_GREEN_VALUE, transparentGreen),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_BLUE_VALUE, transparentBlue),
__ATTRIB(__DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE, transparentAlpha),
__ATTRIB(__DRI_ATTRIB_RED_MASK, redMask),
__ATTRIB(__DRI_ATTRIB_GREEN_MASK, greenMask),
__ATTRIB(__DRI_ATTRIB_BLUE_MASK, blueMask),
__ATTRIB(__DRI_ATTRIB_ALPHA_MASK, alphaMask),
#endif
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_WIDTH, maxPbufferWidth),
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_HEIGHT, maxPbufferHeight),
__ATTRIB(__DRI_ATTRIB_MAX_PBUFFER_PIXELS, maxPbufferPixels),
__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH, optimalPbufferWidth),
__ATTRIB(__DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT, optimalPbufferHeight),
#if 0
__ATTRIB(__DRI_ATTRIB_SWAP_METHOD, swapMethod),
#endif
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGB, bindToTextureRgb),
__ATTRIB(__DRI_ATTRIB_BIND_TO_TEXTURE_RGBA, bindToTextureRgba),
__ATTRIB(__DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE,
bindToMipmapTexture),
__ATTRIB(__DRI_ATTRIB_YINVERTED, yInverted),
__ATTRIB(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable)
};
static int
scalarEqual(struct glx_config *mode, unsigned int attrib, unsigned int value)
{
unsigned int glxValue;
int i;
for (i = 0; i < ARRAY_SIZE(attribMap); i++)
if (attribMap[i].attrib == attrib) {
glxValue = *(unsigned int *) ((char *) mode + attribMap[i].offset);
return glxValue == GLX_DONT_CARE || glxValue == value;
}
return GL_TRUE; /* Is a non-existing attribute equal to value? */
}
static int
driConfigEqual(const __DRIcoreExtension *core,
struct glx_config *config, const __DRIconfig *driConfig)
{
unsigned int attrib, value, glxValue;
int i;
i = 0;
while (core->indexConfigAttrib(driConfig, i++, &attrib, &value)) {
switch (attrib) {
case __DRI_ATTRIB_RENDER_TYPE:
glxValue = 0;
if (value & __DRI_ATTRIB_RGBA_BIT) {
glxValue |= GLX_RGBA_BIT;
}
if (value & __DRI_ATTRIB_COLOR_INDEX_BIT) {
glxValue |= GLX_COLOR_INDEX_BIT;
}
if (value & __DRI_ATTRIB_FLOAT_BIT) {
glxValue |= GLX_RGBA_FLOAT_BIT_ARB;
}
if (value & __DRI_ATTRIB_UNSIGNED_FLOAT_BIT) {
glxValue |= GLX_RGBA_UNSIGNED_FLOAT_BIT_EXT;
}
if (glxValue != config->renderType)
return GL_FALSE;
break;
case __DRI_ATTRIB_CONFIG_CAVEAT:
if (value & __DRI_ATTRIB_NON_CONFORMANT_CONFIG)
glxValue = GLX_NON_CONFORMANT_CONFIG;
else if (value & __DRI_ATTRIB_SLOW_BIT)
glxValue = GLX_SLOW_CONFIG;
else
glxValue = GLX_NONE;
if (glxValue != config->visualRating)
return GL_FALSE;
break;
case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
glxValue = 0;
if (value & __DRI_ATTRIB_TEXTURE_1D_BIT)
glxValue |= GLX_TEXTURE_1D_BIT_EXT;
if (value & __DRI_ATTRIB_TEXTURE_2D_BIT)
glxValue |= GLX_TEXTURE_2D_BIT_EXT;
if (value & __DRI_ATTRIB_TEXTURE_RECTANGLE_BIT)
glxValue |= GLX_TEXTURE_RECTANGLE_BIT_EXT;
if (config->bindToTextureTargets != GLX_DONT_CARE &&
glxValue != config->bindToTextureTargets)
return GL_FALSE;
break;
default:
if (!scalarEqual(config, attrib, value))
return GL_FALSE;
}
}
return GL_TRUE;
}
static struct glx_config *
createDriMode(const __DRIcoreExtension * core,
struct glx_config *config, const __DRIconfig **driConfigs)
{
__GLXDRIconfigPrivate *driConfig;
int i;
for (i = 0; driConfigs[i]; i++) {
if (driConfigEqual(core, config, driConfigs[i]))
break;
}
if (driConfigs[i] == NULL)
return NULL;
driConfig
= malloc(sizeof *driConfig
); if (driConfig == NULL)
return NULL;
driConfig->base = *config;
driConfig->driConfig = driConfigs[i];
return &driConfig->base;
}
_X_HIDDEN struct glx_config *
driConvertConfigs(const __DRIcoreExtension * core,
struct glx_config *configs, const __DRIconfig **driConfigs)
{
struct glx_config head, *tail, *m;
tail = &head;
head.next = NULL;
for (m = configs; m; m = m->next) {
tail->next = createDriMode(core, m, driConfigs);
if (tail->next == NULL) {
/* no matching dri config for m */
continue;
}
tail = tail->next;
}
return head.next;
}
_X_HIDDEN void
driDestroyConfigs(const __DRIconfig **configs)
{
int i;
for (i = 0; configs[i]; i++)
free((__DRIconfig
*) configs
[i
]); }
_X_HIDDEN __GLXDRIdrawable *
driFetchDrawable(struct glx_context *gc, GLXDrawable glxDrawable)
{
struct glx_display *const priv = __glXInitialize(gc->psc->dpy);
__GLXDRIdrawable *pdraw;
struct glx_screen *psc;
if (priv == NULL)
return NULL;
if (glxDrawable == None)
return NULL;
psc = priv->screens[gc->screen];
if (priv->drawHash == NULL)
return NULL;
if (__glxHashLookup(priv->drawHash, glxDrawable, (void *) &pdraw) == 0) {
pdraw->refcount ++;
return pdraw;
}
pdraw = psc->driScreen->createDrawable(psc, glxDrawable,
glxDrawable, gc->config);
if (pdraw == NULL) {
ErrorMessageF("failed to create drawable\n");
return NULL;
}
if (__glxHashInsert(priv->drawHash, glxDrawable, pdraw)) {
(*pdraw->destroyDrawable) (pdraw);
return NULL;
}
pdraw->refcount = 1;
return pdraw;
}
_X_HIDDEN void
driReleaseDrawables(struct glx_context *gc)
{
const struct glx_display *priv = gc->psc->display;
__GLXDRIdrawable *pdraw;
if (priv == NULL)
return;
if (__glxHashLookup(priv->drawHash,
gc->currentDrawable, (void *) &pdraw) == 0) {
if (pdraw->drawable == pdraw->xDrawable) {
pdraw->refcount --;
if (pdraw->refcount == 0) {
(*pdraw->destroyDrawable)(pdraw);
__glxHashDelete(priv->drawHash, gc->currentDrawable);
}
}
}
if (__glxHashLookup(priv->drawHash,
gc->currentReadable, (void *) &pdraw) == 0) {
if (pdraw->drawable == pdraw->xDrawable) {
pdraw->refcount --;
if (pdraw->refcount == 0) {
(*pdraw->destroyDrawable)(pdraw);
__glxHashDelete(priv->drawHash, gc->currentReadable);
}
}
}
gc->currentDrawable = None;
gc->currentReadable = None;
}
_X_HIDDEN bool
dri2_convert_glx_attribs(unsigned num_attribs, const uint32_t *attribs,
unsigned *major_ver, unsigned *minor_ver,
uint32_t *render_type, uint32_t *flags, unsigned *api,
int *reset, unsigned *error)
{
unsigned i;
bool got_profile = false;
uint32_t profile;
*major_ver = 1;
*minor_ver = 0;
*render_type = GLX_RGBA_TYPE;
*reset = __DRI_CTX_RESET_NO_NOTIFICATION;
*flags = 0;
*api = __DRI_API_OPENGL;
if (num_attribs == 0) {
return true;
}
/* This is actually an internal error, but what the heck.
*/
if (attribs == NULL) {
*error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
return false;
}
for (i = 0; i < num_attribs; i++) {
switch (attribs[i * 2]) {
case GLX_CONTEXT_MAJOR_VERSION_ARB:
*major_ver = attribs[i * 2 + 1];
break;
case GLX_CONTEXT_MINOR_VERSION_ARB:
*minor_ver = attribs[i * 2 + 1];
break;
case GLX_CONTEXT_FLAGS_ARB:
*flags = attribs[i * 2 + 1];
break;
case GLX_CONTEXT_PROFILE_MASK_ARB:
profile = attribs[i * 2 + 1];
got_profile = true;
break;
case GLX_RENDER_TYPE:
*render_type = attribs[i * 2 + 1];
break;
case GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB:
switch (attribs[i * 2 + 1]) {
case GLX_NO_RESET_NOTIFICATION_ARB:
*reset = __DRI_CTX_RESET_NO_NOTIFICATION;
break;
case GLX_LOSE_CONTEXT_ON_RESET_ARB:
*reset = __DRI_CTX_RESET_LOSE_CONTEXT;
break;
default:
*error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
return false;
}
break;
default:
/* If an unknown attribute is received, fail.
*/
*error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
return false;
}
}
if (!got_profile) {
if (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
*api = __DRI_API_OPENGL_CORE;
} else {
switch (profile) {
case GLX_CONTEXT_CORE_PROFILE_BIT_ARB:
/* There are no profiles before OpenGL 3.2. The
* GLX_ARB_create_context_profile spec says:
*
* "If the requested OpenGL version is less than 3.2,
* GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality
* of the context is determined solely by the requested version."
*/
*api = (*major_ver > 3 || (*major_ver == 3 && *minor_ver >= 2))
? __DRI_API_OPENGL_CORE : __DRI_API_OPENGL;
break;
case GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB:
*api = __DRI_API_OPENGL;
break;
case GLX_CONTEXT_ES2_PROFILE_BIT_EXT:
*api = __DRI_API_GLES2;
break;
default:
*error = __DRI_CTX_ERROR_BAD_API;
return false;
}
}
/* Unknown flag value.
*/
if (*flags & ~(__DRI_CTX_FLAG_DEBUG | __DRI_CTX_FLAG_FORWARD_COMPATIBLE
| __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS)) {
*error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
return false;
}
/* 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."
*/
if (*major_ver < 3 && (*flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
*error = __DRI_CTX_ERROR_BAD_FLAG;
return false;
}
if (*major_ver >= 3 && *render_type == GLX_COLOR_INDEX_TYPE) {
*error = __DRI_CTX_ERROR_BAD_FLAG;
return false;
}
/* The GLX_EXT_create_context_es2_profile spec says:
*
* "... If the version requested is 2.0, and the
* GLX_CONTEXT_ES2_PROFILE_BIT_EXT bit is set in the
* GLX_CONTEXT_PROFILE_MASK_ARB attribute (see below), then the context
* returned will implement OpenGL ES 2.0. This is the only way in which
* an implementation may request an OpenGL ES 2.0 context."
*/
if (*api == __DRI_API_GLES2 && (*major_ver != 2 || *minor_ver != 0)) {
*error = __DRI_CTX_ERROR_BAD_API;
return false;
}
*error = __DRI_CTX_ERROR_SUCCESS;
return true;
}
#endif /* GLX_DIRECT_RENDERING */