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Diffstat (limited to 'src/gallium/frontends/dri/dri_util.c')
| -rw-r--r-- | src/gallium/frontends/dri/dri_util.c | 1171 |
1 files changed, 1171 insertions, 0 deletions
diff --git a/src/gallium/frontends/dri/dri_util.c b/src/gallium/frontends/dri/dri_util.c new file mode 100644 index 00000000000..4c93d2e4194 --- /dev/null +++ b/src/gallium/frontends/dri/dri_util.c @@ -0,0 +1,1171 @@ +/* + * (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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