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mesa/src/gallium/frontends/dri/dri_util.c

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/*
* (C) Copyright IBM Corporation 2002, 2004
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS AND/OR THEIR SUPPLIERS 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 dri_util.c
* DRI utility functions.
*
* This module acts as glue between GLX and the actual hardware driver. A DRI
* driver doesn't really \e have to use any of this - it's optional. But, some
* useful stuff is done here that otherwise would have to be duplicated in most
* drivers.
*
* Basically, these utility functions take care of some of the dirty details of
* screen initialization, context creation, context binding, DRM setup, etc.
*
* These functions are compiled into each DRI driver so libGL.so knows nothing
* about them.
*/
#include <stdbool.h>
#include "dri_util.h"
#include "dri_context.h"
#include "dri_screen.h"
#include "dri_drawable.h"
#include "util/u_endian.h"
#include "util/u_memory.h"
#include "util/driconf.h"
#include "main/framebuffer.h"
#include "main/version.h"
#include "main/debug_output.h"
#include "main/errors.h"
#include "loader/loader.h"
#include "GL/internal/mesa_interface.h"
#include "loader_dri_helper.h"
driOptionDescription __dri2ConfigOptions[] = {
DRI_CONF_SECTION_DEBUG
DRI_CONF_GLX_EXTENSION_OVERRIDE()
DRI_CONF_INDIRECT_GL_EXTENSION_OVERRIDE()
DRI_CONF_SECTION_END
DRI_CONF_SECTION_PERFORMANCE
DRI_CONF_VBLANK_MODE(DRI_CONF_VBLANK_DEF_INTERVAL_1)
DRI_CONF_BLOCK_ON_DEPLETED_BUFFERS(false)
DRI_CONF_SECTION_END
};
/*****************************************************************/
/** \name Screen handling functions */
/*****************************************************************/
/*@{*/
static void
setupLoaderExtensions(struct dri_screen *screen,
const __DRIextension **extensions)
{
static const struct dri_extension_match matches[] = {
{__DRI_DRI2_LOADER, 1, offsetof(struct dri_screen, dri2.loader), true},
{__DRI_IMAGE_LOOKUP, 1, offsetof(struct dri_screen, dri2.image), true},
{__DRI_USE_INVALIDATE, 1, offsetof(struct dri_screen, dri2.useInvalidate), true},
{__DRI_BACKGROUND_CALLABLE, 1, offsetof(struct dri_screen, dri2.backgroundCallable), true},
{__DRI_SWRAST_LOADER, 1, offsetof(struct dri_screen, swrast_loader), true},
{__DRI_IMAGE_LOADER, 1, offsetof(struct dri_screen, image.loader), true},
{__DRI_MUTABLE_RENDER_BUFFER_LOADER, 1, offsetof(struct dri_screen, mutableRenderBuffer.loader), true},
{__DRI_KOPPER_LOADER, 1, offsetof(struct dri_screen, kopper_loader), true},
};
loader_bind_extensions(screen, matches, ARRAY_SIZE(matches), extensions);
}
/**
* This is the first entrypoint in the driver called by the DRI driver loader
* after dlopen()ing it.
*
* It's used to create global state for the driver across contexts on the same
* Display.
*/
__DRIscreen *
driCreateNewScreen3(int scrn, int fd,
const __DRIextension **loader_extensions,
const __DRIextension **driver_extensions,
const __DRIconfig ***driver_configs, bool implicit, void *data)
{
static const __DRIextension *emptyExtensionList[] = { NULL };
struct dri_screen *screen;
const __DRImesaCoreExtension *mesa = NULL;
screen = CALLOC_STRUCT(dri_screen);
if (!screen)
return NULL;
assert(driver_extensions);
for (int i = 0; driver_extensions[i]; i++) {
if (strcmp(driver_extensions[i]->name, __DRI_MESA) == 0) {
mesa = (__DRImesaCoreExtension *)driver_extensions[i];
}
}
setupLoaderExtensions(screen, loader_extensions);
// dri2 drivers require working invalidate
if (fd != -1 && !screen->dri2.useInvalidate) {
free(screen);
return NULL;
}
screen->loaderPrivate = data;
/* This will be filled in by mesa->initScreen(). */
screen->extensions = emptyExtensionList;
screen->fd = fd;
screen->myNum = scrn;
/* Option parsing before ->InitScreen(), as some options apply there. */
driParseOptionInfo(&screen->optionInfo,
__dri2ConfigOptions, ARRAY_SIZE(__dri2ConfigOptions));
driParseConfigFiles(&screen->optionCache, &screen->optionInfo, screen->myNum,
"dri2", NULL, NULL, NULL, 0, NULL, 0);
*driver_configs = mesa->initScreen(screen, implicit);
if (*driver_configs == NULL) {
dri_destroy_screen(screen);
return NULL;
}
struct gl_constants consts = { 0 };
gl_api api;
unsigned version;
api = API_OPENGLES2;
if (_mesa_override_gl_version_contextless(&consts, &api, &version))
screen->max_gl_es2_version = version;
api = API_OPENGL_COMPAT;
if (_mesa_override_gl_version_contextless(&consts, &api, &version)) {
screen->max_gl_core_version = version;
if (api == API_OPENGL_COMPAT)
screen->max_gl_compat_version = version;
}
screen->api_mask = 0;
if (screen->max_gl_compat_version > 0)
screen->api_mask |= (1 << __DRI_API_OPENGL);
if (screen->max_gl_core_version > 0)
screen->api_mask |= (1 << __DRI_API_OPENGL_CORE);
if (screen->max_gl_es1_version > 0)
screen->api_mask |= (1 << __DRI_API_GLES);
if (screen->max_gl_es2_version > 0)
screen->api_mask |= (1 << __DRI_API_GLES2);
if (screen->max_gl_es2_version >= 30)
screen->api_mask |= (1 << __DRI_API_GLES3);
return opaque_dri_screen(screen);
}
__DRIscreen *
driCreateNewScreen2(int scrn, int fd,
const __DRIextension **loader_extensions,
const __DRIextension **driver_extensions,
const __DRIconfig ***driver_configs, void *data)
{
return driCreateNewScreen3(scrn, fd, loader_extensions,
driver_extensions,
driver_configs, false, data);
}
static __DRIscreen *
dri2CreateNewScreen(int scrn, int fd,
const __DRIextension **extensions,
const __DRIconfig ***driver_configs, void *data)
{
return driCreateNewScreen3(scrn, fd, extensions,
galliumdrm_driver_extensions,
driver_configs, false, data);
}
static __DRIscreen *
swkmsCreateNewScreen(int scrn, int fd,
const __DRIextension **extensions,
const __DRIconfig ***driver_configs, void *data)
{
return driCreateNewScreen3(scrn, fd, extensions,
dri_swrast_kms_driver_extensions,
driver_configs, false, data);
}
/** swrast driver createNewScreen entrypoint. */
static __DRIscreen *
driSWRastCreateNewScreen(int scrn, const __DRIextension **extensions,
const __DRIconfig ***driver_configs, void *data)
{
return driCreateNewScreen3(scrn, -1, extensions,
galliumsw_driver_extensions,
driver_configs, false, data);
}
static __DRIscreen *
driSWRastCreateNewScreen2(int scrn, const __DRIextension **extensions,
const __DRIextension **driver_extensions,
const __DRIconfig ***driver_configs, void *data)
{
return driCreateNewScreen3(scrn, -1, extensions, driver_extensions,
driver_configs, false, data);
}
static __DRIscreen *
driSWRastCreateNewScreen3(int scrn, const __DRIextension **extensions,
const __DRIextension **driver_extensions,
const __DRIconfig ***driver_configs, bool implicit, void *data)
{
return driCreateNewScreen3(scrn, -1, extensions, driver_extensions,
driver_configs, implicit, data);
}
/**
* Destroy the per-screen private information.
*
* \internal
* This function calls __DriverAPIRec::DestroyScreen on \p screenPrivate, calls
* drmClose(), and finally frees \p screenPrivate.
*/
static void driDestroyScreen(__DRIscreen *psp)
{
if (psp) {
/* No interaction with the X-server is possible at this point. This
* routine is called after XCloseDisplay, so there is no protocol
* stream open to the X-server anymore.
*/
dri_destroy_screen(dri_screen(psp));
}
}
static const __DRIextension **driGetExtensions(__DRIscreen *psp)
{
return dri_screen(psp)->extensions;
}
/*@}*/
/* WARNING: HACK: Local defines to avoid pulling glx.h.
*/
#define GLX_NONE 0x8000
#define GLX_DONT_CARE 0xFFFFFFFF
#define SIMPLE_CASE(attrib, field) case attrib: *value = config->modes.field; break
/**
* Return the value of a configuration attribute. The attribute is
* indicated by the index.
*/
static int
driGetConfigAttribIndex(const __DRIconfig *config,
unsigned int index, unsigned int *value)
{
switch (index + 1) {
SIMPLE_CASE(__DRI_ATTRIB_BUFFER_SIZE, rgbBits);
SIMPLE_CASE(__DRI_ATTRIB_RED_SIZE, redBits);
SIMPLE_CASE(__DRI_ATTRIB_GREEN_SIZE, greenBits);
SIMPLE_CASE(__DRI_ATTRIB_BLUE_SIZE, blueBits);
case __DRI_ATTRIB_LEVEL:
case __DRI_ATTRIB_LUMINANCE_SIZE:
case __DRI_ATTRIB_AUX_BUFFERS:
*value = 0;
break;
SIMPLE_CASE(__DRI_ATTRIB_ALPHA_SIZE, alphaBits);
case __DRI_ATTRIB_ALPHA_MASK_SIZE:
/* I have no idea what this value was ever meant to mean, it's
* never been set to anything, just say 0.
*/
*value = 0;
break;
SIMPLE_CASE(__DRI_ATTRIB_DEPTH_SIZE, depthBits);
SIMPLE_CASE(__DRI_ATTRIB_STENCIL_SIZE, stencilBits);
SIMPLE_CASE(__DRI_ATTRIB_ACCUM_RED_SIZE, accumRedBits);
SIMPLE_CASE(__DRI_ATTRIB_ACCUM_GREEN_SIZE, accumGreenBits);
SIMPLE_CASE(__DRI_ATTRIB_ACCUM_BLUE_SIZE, accumBlueBits);
SIMPLE_CASE(__DRI_ATTRIB_ACCUM_ALPHA_SIZE, accumAlphaBits);
case __DRI_ATTRIB_SAMPLE_BUFFERS:
*value = !!config->modes.samples;
break;
SIMPLE_CASE(__DRI_ATTRIB_SAMPLES, samples);
case __DRI_ATTRIB_RENDER_TYPE:
/* no support for color index mode */
*value = __DRI_ATTRIB_RGBA_BIT;
if (config->modes.floatMode)
*value |= __DRI_ATTRIB_FLOAT_BIT;
break;
case __DRI_ATTRIB_CONFIG_CAVEAT:
if (config->modes.accumRedBits != 0)
*value = __DRI_ATTRIB_SLOW_BIT;
else
*value = 0;
break;
case __DRI_ATTRIB_CONFORMANT:
*value = GL_TRUE;
break;
SIMPLE_CASE(__DRI_ATTRIB_DOUBLE_BUFFER, doubleBufferMode);
SIMPLE_CASE(__DRI_ATTRIB_STEREO, stereoMode);
case __DRI_ATTRIB_TRANSPARENT_TYPE:
case __DRI_ATTRIB_TRANSPARENT_INDEX_VALUE: /* horrible bc hack */
*value = GLX_NONE;
break;
case __DRI_ATTRIB_TRANSPARENT_RED_VALUE:
case __DRI_ATTRIB_TRANSPARENT_GREEN_VALUE:
case __DRI_ATTRIB_TRANSPARENT_BLUE_VALUE:
case __DRI_ATTRIB_TRANSPARENT_ALPHA_VALUE:
*value = GLX_DONT_CARE;
break;
case __DRI_ATTRIB_FLOAT_MODE:
*value = config->modes.floatMode;
break;
SIMPLE_CASE(__DRI_ATTRIB_RED_MASK, redMask);
SIMPLE_CASE(__DRI_ATTRIB_GREEN_MASK, greenMask);
SIMPLE_CASE(__DRI_ATTRIB_BLUE_MASK, blueMask);
SIMPLE_CASE(__DRI_ATTRIB_ALPHA_MASK, alphaMask);
case __DRI_ATTRIB_MAX_PBUFFER_WIDTH:
case __DRI_ATTRIB_MAX_PBUFFER_HEIGHT:
case __DRI_ATTRIB_MAX_PBUFFER_PIXELS:
case __DRI_ATTRIB_OPTIMAL_PBUFFER_WIDTH:
case __DRI_ATTRIB_OPTIMAL_PBUFFER_HEIGHT:
case __DRI_ATTRIB_VISUAL_SELECT_GROUP:
*value = 0;
break;
case __DRI_ATTRIB_SWAP_METHOD:
/* Not supported any more, but we have the __DRI_ATTRIB still defined
* for the X server's sake, and EGL will expect us to handle it because
* it iterates all __DRI_ATTRIBs.
*/
*value = __DRI_ATTRIB_SWAP_UNDEFINED;
break;
case __DRI_ATTRIB_MAX_SWAP_INTERVAL:
*value = INT_MAX;
break;
case __DRI_ATTRIB_MIN_SWAP_INTERVAL:
*value = 0;
break;
case __DRI_ATTRIB_BIND_TO_TEXTURE_RGB:
case __DRI_ATTRIB_BIND_TO_TEXTURE_RGBA:
case __DRI_ATTRIB_YINVERTED:
*value = GL_TRUE;
break;
case __DRI_ATTRIB_BIND_TO_MIPMAP_TEXTURE:
*value = GL_FALSE;
break;
case __DRI_ATTRIB_BIND_TO_TEXTURE_TARGETS:
*value = __DRI_ATTRIB_TEXTURE_1D_BIT |
__DRI_ATTRIB_TEXTURE_2D_BIT |
__DRI_ATTRIB_TEXTURE_RECTANGLE_BIT;
break;
SIMPLE_CASE(__DRI_ATTRIB_FRAMEBUFFER_SRGB_CAPABLE, sRGBCapable);
case __DRI_ATTRIB_MUTABLE_RENDER_BUFFER:
*value = GL_FALSE;
break;
SIMPLE_CASE(__DRI_ATTRIB_RED_SHIFT, redShift);
SIMPLE_CASE(__DRI_ATTRIB_GREEN_SHIFT, greenShift);
SIMPLE_CASE(__DRI_ATTRIB_BLUE_SHIFT, blueShift);
SIMPLE_CASE(__DRI_ATTRIB_ALPHA_SHIFT, alphaShift);
default:
/* XXX log an error or smth */
return GL_FALSE;
}
return GL_TRUE;
}
/**
* Get the value of a configuration attribute.
* \param attrib the attribute (one of the _DRI_ATTRIB_x tokens)
* \param value returns the attribute's value
* \return 1 for success, 0 for failure
*/
static int
driGetConfigAttrib(const __DRIconfig *config,
unsigned int attrib, unsigned int *value)
{
return driGetConfigAttribIndex(config, attrib - 1, value);
}
/**
* Get a configuration attribute name and value, given an index.
* \param index which field of the __DRIconfig to query
* \param attrib returns the attribute name (one of the _DRI_ATTRIB_x tokens)
* \param value returns the attribute's value
* \return 1 for success, 0 for failure
*/
static int
driIndexConfigAttrib(const __DRIconfig *config, int index,
unsigned int *attrib, unsigned int *value)
{
if (driGetConfigAttribIndex(config, index, value)) {
*attrib = index + 1;
return GL_TRUE;
}
return GL_FALSE;
}
static int
validate_context_version(struct dri_screen *screen,
int mesa_api,
unsigned major_version,
unsigned minor_version)
{
unsigned req_version = 10 * major_version + minor_version;
unsigned max_version = 0;
if (major_version == 0 || major_version > 4)
return __DRI_CTX_ERROR_BAD_API;
if (mesa_api == API_OPENGL_COMPAT) {
if ((major_version == 4 && minor_version > 6) ||
(major_version == 3 && minor_version > 3) ||
(major_version == 2 && minor_version > 1) ||
(major_version == 1 && minor_version > 5))
return __DRI_CTX_ERROR_BAD_API;
max_version = screen->max_gl_compat_version;
} else if (mesa_api == API_OPENGLES) {
if (major_version > 1 || minor_version > 1)
return __DRI_CTX_ERROR_BAD_API;
max_version = screen->max_gl_es1_version;
} else if (mesa_api == API_OPENGLES2) {
if ((major_version > 3) ||
(major_version == 3 && minor_version > 2) ||
(major_version == 2 && minor_version > 0) ||
(major_version < 2))
return __DRI_CTX_ERROR_BAD_API;
max_version = screen->max_gl_es2_version;
} else if (mesa_api == API_OPENGL_CORE) {
if ((major_version == 4 && minor_version > 6) ||
(major_version == 3 && minor_version > 3) ||
(major_version < 3))
return __DRI_CTX_ERROR_BAD_API;
max_version = screen->max_gl_core_version;
} else {
return __DRI_CTX_ERROR_BAD_API;
}
if (max_version == 0)
return __DRI_CTX_ERROR_BAD_VERSION;
if (req_version > max_version)
return __DRI_CTX_ERROR_BAD_VERSION;
return __DRI_CTX_ERROR_SUCCESS;
}
/*****************************************************************/
/** \name Context handling functions */
/*****************************************************************/
/*@{*/
__DRIcontext *
driCreateContextAttribs(__DRIscreen *psp, int api,
const __DRIconfig *config,
__DRIcontext *shared,
unsigned num_attribs,
const uint32_t *attribs,
unsigned *error,
void *data)
{
struct dri_screen *screen = dri_screen(psp);
const struct gl_config *modes = (config != NULL) ? &config->modes : NULL;
gl_api mesa_api;
struct __DriverContextConfig ctx_config;
ctx_config.major_version = 1;
ctx_config.minor_version = 0;
ctx_config.flags = 0;
ctx_config.attribute_mask = 0;
ctx_config.priority = __DRI_CTX_PRIORITY_MEDIUM;
assert((num_attribs == 0) || (attribs != NULL));
switch (api) {
case __DRI_API_OPENGL:
mesa_api = API_OPENGL_COMPAT;
break;
case __DRI_API_GLES:
mesa_api = API_OPENGLES;
break;
case __DRI_API_GLES2:
case __DRI_API_GLES3:
mesa_api = API_OPENGLES2;
break;
case __DRI_API_OPENGL_CORE:
mesa_api = API_OPENGL_CORE;
break;
default:
*error = __DRI_CTX_ERROR_BAD_API;
return NULL;
}
for (unsigned i = 0; i < num_attribs; i++) {
switch (attribs[i * 2]) {
case __DRI_CTX_ATTRIB_MAJOR_VERSION:
ctx_config.major_version = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_MINOR_VERSION:
ctx_config.minor_version = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_FLAGS:
ctx_config.flags = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_RESET_STRATEGY:
if (attribs[i * 2 + 1] != __DRI_CTX_RESET_NO_NOTIFICATION) {
ctx_config.attribute_mask |=
__DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
ctx_config.reset_strategy = attribs[i * 2 + 1];
} else {
ctx_config.attribute_mask &=
~__DRIVER_CONTEXT_ATTRIB_RESET_STRATEGY;
}
break;
case __DRI_CTX_ATTRIB_PRIORITY:
ctx_config.attribute_mask |= __DRIVER_CONTEXT_ATTRIB_PRIORITY;
ctx_config.priority = attribs[i * 2 + 1];
break;
case __DRI_CTX_ATTRIB_RELEASE_BEHAVIOR:
if (attribs[i * 2 + 1] != __DRI_CTX_RELEASE_BEHAVIOR_FLUSH) {
ctx_config.attribute_mask |=
__DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
ctx_config.release_behavior = attribs[i * 2 + 1];
} else {
ctx_config.attribute_mask &=
~__DRIVER_CONTEXT_ATTRIB_RELEASE_BEHAVIOR;
}
break;
case __DRI_CTX_ATTRIB_NO_ERROR:
if (attribs[i * 2 + 1] != 0) {
ctx_config.attribute_mask |=
__DRIVER_CONTEXT_ATTRIB_NO_ERROR;
ctx_config.no_error = attribs[i * 2 + 1];
} else {
ctx_config.attribute_mask &=
~__DRIVER_CONTEXT_ATTRIB_NO_ERROR;
}
break;
case __DRI_CTX_ATTRIB_PROTECTED:
if (attribs[i * 2 + 1]) {
ctx_config.attribute_mask |= __DRIVER_CONTEXT_ATTRIB_PROTECTED;
} else {
ctx_config.attribute_mask &= ~__DRIVER_CONTEXT_ATTRIB_PROTECTED;
}
break;
default:
/* We can't create a context that satisfies the requirements of an
* attribute that we don't understand. Return failure.
*/
assert(!"Should not get here.");
*error = __DRI_CTX_ERROR_UNKNOWN_ATTRIBUTE;
return NULL;
}
}
/* The specific Mesa driver may not support the GL_ARB_compatibilty
* extension or the compatibility profile. In that case, we treat an
* API_OPENGL_COMPAT 3.1 as API_OPENGL_CORE. We reject API_OPENGL_COMPAT
* 3.2+ in any case.
*/
if (mesa_api == API_OPENGL_COMPAT &&
ctx_config.major_version == 3 && ctx_config.minor_version == 1 &&
screen->max_gl_compat_version < 31)
mesa_api = API_OPENGL_CORE;
/* The latest version of EGL_KHR_create_context spec says:
*
* "If the EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR flag bit is set in
* EGL_CONTEXT_FLAGS_KHR, then a <debug context> will be created.
* [...] This bit is supported for OpenGL and OpenGL ES contexts.
*
* No other EGL_CONTEXT_OPENGL_*_BIT is legal for an ES context.
*
* However, Mesa's EGL layer translates the context attribute
* EGL_CONTEXT_OPENGL_ROBUST_ACCESS into the context flag
* __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS. That attribute is legal for ES
* (with EGL 1.5 or EGL_EXT_create_context_robustness) and GL (only with
* EGL 1.5).
*
* From the EGL_EXT_create_context_robustness spec:
*
* This extension is written against the OpenGL ES 2.0 Specification
* but can apply to OpenGL ES 1.1 and up.
*
* From the EGL 1.5 (2014.08.27) spec, p55:
*
* If the EGL_CONTEXT_OPENGL_ROBUST_ACCESS attribute is set to
* EGL_TRUE, a context supporting robust buffer access will be created.
* OpenGL contexts must support the GL_ARB_robustness extension, or
* equivalent core API functional- ity. OpenGL ES contexts must support
* the GL_EXT_robustness extension, or equivalent core API
* functionality.
*/
if (mesa_api != API_OPENGL_COMPAT
&& mesa_api != API_OPENGL_CORE
&& (ctx_config.flags & ~(__DRI_CTX_FLAG_DEBUG |
__DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS))) {
*error = __DRI_CTX_ERROR_BAD_FLAG;
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."
*
* Forward-looking contexts are supported by silently converting the
* requested API to API_OPENGL_CORE.
*
* In Mesa, a debug context is the same as a regular context.
*/
if ((ctx_config.flags & __DRI_CTX_FLAG_FORWARD_COMPATIBLE) != 0) {
mesa_api = API_OPENGL_CORE;
}
const uint32_t allowed_flags = (__DRI_CTX_FLAG_DEBUG
| __DRI_CTX_FLAG_FORWARD_COMPATIBLE
| __DRI_CTX_FLAG_ROBUST_BUFFER_ACCESS
| __DRI_CTX_FLAG_RESET_ISOLATION);
if (ctx_config.flags & ~allowed_flags) {
*error = __DRI_CTX_ERROR_UNKNOWN_FLAG;
return NULL;
}
*error = validate_context_version(screen, mesa_api,
ctx_config.major_version,
ctx_config.minor_version);
if (*error != __DRI_CTX_ERROR_SUCCESS)
return NULL;
struct dri_context *ctx = dri_create_context(screen, mesa_api,
modes, &ctx_config, error,
dri_context(shared),
data);
return opaque_dri_context(ctx);
}
static __DRIcontext *
driCreateNewContextForAPI(__DRIscreen *screen, int api,
const __DRIconfig *config,
__DRIcontext *shared, void *data)
{
unsigned error;
return driCreateContextAttribs(screen, api, config, shared, 0, NULL,
&error, data);
}
static __DRIcontext *
driCreateNewContext(__DRIscreen *screen, const __DRIconfig *config,
__DRIcontext *shared, void *data)
{
return driCreateNewContextForAPI(screen, __DRI_API_OPENGL,
config, shared, data);
}
/**
* Destroy the per-context private information.
*
* \internal
* This function calls __DriverAPIRec::DestroyContext on \p contextPrivate, calls
* drmDestroyContext(), and finally frees \p contextPrivate.
*/
static void
driDestroyContext(__DRIcontext *pcp)
{
if (pcp)
dri_destroy_context(dri_context(pcp));
}
static int
driCopyContext(__DRIcontext *dest, __DRIcontext *src, unsigned long mask)
{
(void) dest;
(void) src;
(void) mask;
return GL_FALSE;
}
/*@}*/
/*****************************************************************/
/** \name Context (un)binding functions */
/*****************************************************************/
/*@{*/
/**
* This function takes both a read buffer and a draw buffer. This is needed
* for \c glXMakeCurrentReadSGI or GLX 1.3's \c glXMakeContextCurrent
* function.
*/
static int driBindContext(__DRIcontext *pcp,
__DRIdrawable *pdp,
__DRIdrawable *prp)
{
/*
** Assume error checking is done properly in glXMakeCurrent before
** calling driBindContext.
*/
if (!pcp)
return GL_FALSE;
return dri_make_current(dri_context(pcp), dri_drawable(pdp),
dri_drawable(prp));
}
/**
* Unbind context.
*
* \param scrn the screen.
* \param gc context.
*
* \return \c GL_TRUE on success, or \c GL_FALSE on failure.
*
* \internal
* This function calls __DriverAPIRec::UnbindContext, and then decrements
* dri_drawable::refcount which must be non-zero for a successful
* return.
*
* While casting the opaque private pointers associated with the parameters
* into their respective real types it also assures they are not \c NULL.
*/
static int driUnbindContext(__DRIcontext *pcp)
{
/*
** Assume error checking is done properly in glXMakeCurrent before
** calling driUnbindContext.
*/
if (pcp == NULL)
return GL_FALSE;
/*
** Call dri_unbind_context before checking for valid drawables
** to handle surfaceless contexts properly.
*/
return dri_unbind_context(dri_context(pcp));
}
/*@}*/
static __DRIdrawable *
driCreateNewDrawable(__DRIscreen *psp,
const __DRIconfig *config,
void *data)
{
assert(data != NULL);
struct dri_screen *screen = dri_screen(psp);
struct dri_drawable *drawable =
screen->create_drawable(screen, &config->modes, GL_FALSE, data);
drawable->buffer_age = 0;
return opaque_dri_drawable(drawable);
}
static void
driDestroyDrawable(__DRIdrawable *pdp)
{
dri_put_drawable(dri_drawable(pdp));
}
static __DRIbuffer *
dri2AllocateBuffer(__DRIscreen *psp,
unsigned int attachment, unsigned int format,
int width, int height)
{
struct dri_screen *screen = dri_screen(psp);
return screen->allocate_buffer(screen, attachment, format, width, height);
}
static void
dri2ReleaseBuffer(__DRIscreen *psp, __DRIbuffer *buffer)
{
struct dri_screen *screen = dri_screen(psp);
screen->release_buffer(buffer);
}
static int
dri2ConfigQueryb(__DRIscreen *psp, const char *var, unsigned char *val)
{
struct dri_screen *screen = dri_screen(psp);
if (!driCheckOption(&screen->optionCache, var, DRI_BOOL))
return -1;
*val = driQueryOptionb(&screen->optionCache, var);
return 0;
}
static int
dri2ConfigQueryi(__DRIscreen *psp, const char *var, int *val)
{
struct dri_screen *screen = dri_screen(psp);
if (!driCheckOption(&screen->optionCache, var, DRI_INT) &&
!driCheckOption(&screen->optionCache, var, DRI_ENUM))
return -1;
*val = driQueryOptioni(&screen->optionCache, var);
return 0;
}
static int
dri2ConfigQueryf(__DRIscreen *psp, const char *var, float *val)
{
struct dri_screen *screen = dri_screen(psp);
if (!driCheckOption(&screen->optionCache, var, DRI_FLOAT))
return -1;
*val = driQueryOptionf(&screen->optionCache, var);
return 0;
}
static int
dri2ConfigQuerys(__DRIscreen *psp, const char *var, char **val)
{
struct dri_screen *screen = dri_screen(psp);
if (!driCheckOption(&screen->optionCache, var, DRI_STRING))
return -1;
*val = driQueryOptionstr(&screen->optionCache, var);
return 0;
}
static unsigned int
driGetAPIMask(__DRIscreen *screen)
{
return dri_screen(screen)->api_mask;
}
/**
* swrast swapbuffers entrypoint.
*
* DRI2 implements this inside the loader with only flushes handled by the
* driver.
*/
static void
driSwapBuffersWithDamage(__DRIdrawable *pdp, int nrects, const int *rects)
{
struct dri_drawable *drawable = dri_drawable(pdp);
assert(drawable->screen->swrast_loader);
drawable->swap_buffers_with_damage(drawable, nrects, rects);
}
static void
driSwapBuffers(__DRIdrawable *pdp)
{
struct dri_drawable *drawable = dri_drawable(pdp);
assert(drawable->screen->swrast_loader);
drawable->swap_buffers(drawable);
}
static int
driSWRastQueryBufferAge(__DRIdrawable *pdp)
{
struct dri_drawable *drawable = dri_drawable(pdp);
return drawable->buffer_age;
}
/** Core interface */
const __DRIcoreExtension driCoreExtension = {
.base = { __DRI_CORE, 2 },
.createNewScreen = NULL,
.destroyScreen = driDestroyScreen,
.getExtensions = driGetExtensions,
.getConfigAttrib = driGetConfigAttrib,
.indexConfigAttrib = driIndexConfigAttrib,
.createNewDrawable = NULL,
.destroyDrawable = driDestroyDrawable,
.swapBuffers = driSwapBuffers, /* swrast */
.swapBuffersWithDamage = driSwapBuffersWithDamage, /* swrast */
.createNewContext = driCreateNewContext, /* swrast */
.copyContext = driCopyContext,
.destroyContext = driDestroyContext,
.bindContext = driBindContext,
.unbindContext = driUnbindContext
};
#if HAVE_DRI2
/** DRI2 interface */
const __DRIdri2Extension driDRI2Extension = {
.base = { __DRI_DRI2, 5 },
.createNewScreen = dri2CreateNewScreen,
.createNewDrawable = driCreateNewDrawable,
.createNewContext = driCreateNewContext,
.getAPIMask = driGetAPIMask,
.createNewContextForAPI = driCreateNewContextForAPI,
.allocateBuffer = dri2AllocateBuffer,
.releaseBuffer = dri2ReleaseBuffer,
.createContextAttribs = driCreateContextAttribs,
.createNewScreen2 = driCreateNewScreen2,
.createNewScreen3 = driCreateNewScreen3,
};
const __DRIdri2Extension swkmsDRI2Extension = {
.base = { __DRI_DRI2, 5 },
.createNewScreen = swkmsCreateNewScreen,
.createNewDrawable = driCreateNewDrawable,
.createNewContext = driCreateNewContext,
.getAPIMask = driGetAPIMask,
.createNewContextForAPI = driCreateNewContextForAPI,
.allocateBuffer = dri2AllocateBuffer,
.releaseBuffer = dri2ReleaseBuffer,
.createContextAttribs = driCreateContextAttribs,
.createNewScreen2 = driCreateNewScreen2,
.createNewScreen3 = driCreateNewScreen3,
};
#endif
const __DRIswrastExtension driSWRastExtension = {
.base = { __DRI_SWRAST, 5 },
.createNewScreen = driSWRastCreateNewScreen,
.createNewDrawable = driCreateNewDrawable,
.createNewContextForAPI = driCreateNewContextForAPI,
.createContextAttribs = driCreateContextAttribs,
.createNewScreen2 = driSWRastCreateNewScreen2,
.queryBufferAge = driSWRastQueryBufferAge,
.createNewScreen3 = driSWRastCreateNewScreen3,
};
const __DRI2configQueryExtension dri2ConfigQueryExtension = {
.base = { __DRI2_CONFIG_QUERY, 2 },
.configQueryb = dri2ConfigQueryb,
.configQueryi = dri2ConfigQueryi,
.configQueryf = dri2ConfigQueryf,
.configQuerys = dri2ConfigQuerys,
};
const __DRI2flushControlExtension dri2FlushControlExtension = {
.base = { __DRI2_FLUSH_CONTROL, 1 }
};
/*
* Note: the first match is returned, which is important for formats like
* __DRI_IMAGE_FORMAT_R8 which maps to both MESA_FORMAT_{R,L}_UNORM8
*/
static const struct {
uint32_t image_format;
mesa_format mesa_format;
GLenum internal_format;
} format_mapping[] = {
{
.image_format = __DRI_IMAGE_FORMAT_RGB565,
.mesa_format = MESA_FORMAT_B5G6R5_UNORM,
.internal_format = GL_RGB565,
},
{
.image_format = __DRI_IMAGE_FORMAT_ARGB1555,
.mesa_format = MESA_FORMAT_B5G5R5A1_UNORM,
.internal_format = GL_RGB5_A1,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR1555,
.mesa_format = MESA_FORMAT_R5G5B5A1_UNORM,
.internal_format = GL_RGB5_A1,
},
{
.image_format = __DRI_IMAGE_FORMAT_XRGB8888,
.mesa_format = MESA_FORMAT_B8G8R8X8_UNORM,
.internal_format = GL_RGB8,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR16161616F,
.mesa_format = MESA_FORMAT_RGBA_FLOAT16,
.internal_format = GL_RGBA16F,
},
{
.image_format = __DRI_IMAGE_FORMAT_XBGR16161616F,
.mesa_format = MESA_FORMAT_RGBX_FLOAT16,
.internal_format = GL_RGB16F,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR16161616,
.mesa_format = MESA_FORMAT_RGBA_UNORM16,
.internal_format = GL_RGBA16,
},
{
.image_format = __DRI_IMAGE_FORMAT_XBGR16161616,
.mesa_format = MESA_FORMAT_RGBX_UNORM16,
.internal_format = GL_RGB16,
},
{
.image_format = __DRI_IMAGE_FORMAT_ARGB2101010,
.mesa_format = MESA_FORMAT_B10G10R10A2_UNORM,
.internal_format = GL_RGB10_A2,
},
{
.image_format = __DRI_IMAGE_FORMAT_XRGB2101010,
.mesa_format = MESA_FORMAT_B10G10R10X2_UNORM,
.internal_format = GL_RGB10,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR2101010,
.mesa_format = MESA_FORMAT_R10G10B10A2_UNORM,
.internal_format = GL_RGB10_A2,
},
{
.image_format = __DRI_IMAGE_FORMAT_XBGR2101010,
.mesa_format = MESA_FORMAT_R10G10B10X2_UNORM,
.internal_format = GL_RGB10,
},
{
.image_format = __DRI_IMAGE_FORMAT_ARGB8888,
.mesa_format = MESA_FORMAT_B8G8R8A8_UNORM,
.internal_format = GL_RGBA8,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR8888,
.mesa_format = MESA_FORMAT_R8G8B8A8_UNORM,
.internal_format = GL_RGBA8,
},
{
.image_format = __DRI_IMAGE_FORMAT_XBGR8888,
.mesa_format = MESA_FORMAT_R8G8B8X8_UNORM,
.internal_format = GL_RGB8,
},
{
.image_format = __DRI_IMAGE_FORMAT_R8,
.mesa_format = MESA_FORMAT_R_UNORM8,
.internal_format = GL_R8,
},
{
.image_format = __DRI_IMAGE_FORMAT_R8,
.mesa_format = MESA_FORMAT_L_UNORM8,
.internal_format = GL_R8,
},
#if UTIL_ARCH_LITTLE_ENDIAN
{
.image_format = __DRI_IMAGE_FORMAT_GR88,
.mesa_format = MESA_FORMAT_RG_UNORM8,
.internal_format = GL_RG8,
},
{
.image_format = __DRI_IMAGE_FORMAT_GR88,
.mesa_format = MESA_FORMAT_LA_UNORM8,
.internal_format = GL_RG8,
},
#endif
{
.image_format = __DRI_IMAGE_FORMAT_SABGR8,
.mesa_format = MESA_FORMAT_R8G8B8A8_SRGB,
.internal_format = GL_SRGB8_ALPHA8,
},
{
.image_format = __DRI_IMAGE_FORMAT_SARGB8,
.mesa_format = MESA_FORMAT_B8G8R8A8_SRGB,
.internal_format = GL_SRGB8_ALPHA8,
},
{
.image_format = __DRI_IMAGE_FORMAT_SXRGB8,
.mesa_format = MESA_FORMAT_B8G8R8X8_SRGB,
.internal_format = GL_SRGB8,
},
{
.image_format = __DRI_IMAGE_FORMAT_R16,
.mesa_format = MESA_FORMAT_R_UNORM16,
.internal_format = GL_R16,
},
{
.image_format = __DRI_IMAGE_FORMAT_R16,
.mesa_format = MESA_FORMAT_L_UNORM16,
.internal_format = GL_R16,
},
#if UTIL_ARCH_LITTLE_ENDIAN
{
.image_format = __DRI_IMAGE_FORMAT_GR1616,
.mesa_format = MESA_FORMAT_RG_UNORM16,
.internal_format = GL_RG16,
},
{
.image_format = __DRI_IMAGE_FORMAT_GR1616,
.mesa_format = MESA_FORMAT_LA_UNORM16,
.internal_format = GL_RG16,
},
#endif
{
.image_format = __DRI_IMAGE_FORMAT_ARGB4444,
.mesa_format = MESA_FORMAT_B4G4R4A4_UNORM,
.internal_format = GL_RGBA4,
},
{
.image_format = __DRI_IMAGE_FORMAT_ABGR4444,
.mesa_format = MESA_FORMAT_R4G4B4A4_UNORM,
.internal_format = GL_RGBA4,
},
};
uint32_t
driGLFormatToImageFormat(mesa_format format)
{
for (size_t i = 0; i < ARRAY_SIZE(format_mapping); i++)
if (format_mapping[i].mesa_format == format)
return format_mapping[i].image_format;
return __DRI_IMAGE_FORMAT_NONE;
}
uint32_t
driGLFormatToSizedInternalGLFormat(mesa_format format)
{
for (size_t i = 0; i < ARRAY_SIZE(format_mapping); i++)
if (format_mapping[i].mesa_format == format)
return format_mapping[i].internal_format;
return GL_NONE;
}
mesa_format
driImageFormatToGLFormat(uint32_t image_format)
{
for (size_t i = 0; i < ARRAY_SIZE(format_mapping); i++)
if (format_mapping[i].image_format == image_format)
return format_mapping[i].mesa_format;
return MESA_FORMAT_NONE;
}
/** Image driver interface */
const __DRIimageDriverExtension driImageDriverExtension = {
.base = { __DRI_IMAGE_DRIVER, 2 },
.createNewScreen2 = driCreateNewScreen2,
.createNewDrawable = driCreateNewDrawable,
.getAPIMask = driGetAPIMask,
.createContextAttribs = driCreateContextAttribs,
.createNewScreen3 = driCreateNewScreen3,
};
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