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xserver/glamor/glamor_glx_provider.c

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/*
* Copyright © 2019 Red Hat, Inc.
*
* 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 (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Adam Jackson <ajax@redhat.com>
*/
/*
* Sets up GLX capabilities based on the EGL capabilities of the glamor
* renderer for the screen. Without this you will get whatever swrast
* can do, which often does not include things like multisample visuals.
*/
#include <dix-config.h>
#define MESA_EGL_NO_X11_HEADERS
#define EGL_NO_X11
#include <epoxy/egl.h>
#include "glxserver.h"
#include "glxutil.h"
#include "compint.h"
#include <X11/extensions/composite.h>
#include "glamor_priv.h"
#include "glamor.h"
/* Can't get these from <GL/glx.h> since it pulls in client headers */
#define GLX_RGBA_BIT 0x00000001
#define GLX_WINDOW_BIT 0x00000001
#define GLX_PIXMAP_BIT 0x00000002
#define GLX_PBUFFER_BIT 0x00000004
#define GLX_NONE 0x8000
#define GLX_SLOW_CONFIG 0x8001
#define GLX_TRUE_COLOR 0x8002
#define GLX_DIRECT_COLOR 0x8003
#define GLX_NON_CONFORMANT_CONFIG 0x800D
#define GLX_DONT_CARE 0xFFFFFFFF
#define GLX_RGBA_FLOAT_BIT_ARB 0x00000004
#define GLX_SWAP_UNDEFINED_OML 0x8063
struct egl_config {
__GLXconfig base;
EGLConfig config;
};
struct egl_screen {
__GLXscreen base;
EGLDisplay display;
EGLConfig *configs;
};
static void
egl_screen_destroy(__GLXscreen *_screen)
{
struct egl_screen *screen = (struct egl_screen *)_screen;
/* XXX do we leak the fbconfig list? */
free(screen->configs);
__glXScreenDestroy(_screen);
free(_screen);
}
static void
egl_drawable_destroy(__GLXdrawable *draw)
{
free(draw);
}
static GLboolean
egl_drawable_swap_buffers(ClientPtr client, __GLXdrawable *draw)
{
return GL_FALSE;
}
static void
egl_drawable_copy_sub_buffer(__GLXdrawable *draw, int x, int y, int w, int h)
{
}
static void
egl_drawable_wait_x(__GLXdrawable *draw)
{
glamor_block_handler(draw->pDraw->pScreen);
}
static void
egl_drawable_wait_gl(__GLXdrawable *draw)
{
}
static __GLXdrawable *
egl_create_glx_drawable(ClientPtr client, __GLXscreen *screen,
DrawablePtr draw, XID drawid, int type,
XID glxdrawid, __GLXconfig *modes)
{
__GLXdrawable *ret;
ret = calloc(1, sizeof *ret);
if (!ret)
return NULL;
if (!__glXDrawableInit(ret, screen, draw, type, glxdrawid, modes)) {
free(ret);
return NULL;
}
ret->destroy = egl_drawable_destroy;
ret->swapBuffers = egl_drawable_swap_buffers;
ret->copySubBuffer = egl_drawable_copy_sub_buffer;
ret->waitX = egl_drawable_wait_x;
ret->waitGL = egl_drawable_wait_gl;
return ret;
}
/*
* TODO:
*
* - bindToTextureTargets is suspicious
* - better channel mask setup
* - drawable type masks is suspicious
*/
static struct egl_config *
translate_eglconfig(ScreenPtr pScreen, struct egl_screen *screen, EGLConfig hc,
struct egl_config *chain, Bool direct_color,
Bool double_buffer, Bool duplicate_for_composite,
Bool srgb_only)
{
EGLint value;
bool valid_depth;
int i;
struct egl_config *c = calloc(1, sizeof *c);
if (!c)
return chain;
/* constants. changing these requires (at least) new EGL extensions */
c->base.stereoMode = GL_FALSE;
c->base.numAuxBuffers = 0;
c->base.level = 0;
c->base.transparentAlpha = 0;
c->base.transparentIndex = 0;
c->base.transparentPixel = GLX_NONE;
c->base.visualSelectGroup = 0;
c->base.indexBits = 0;
c->base.optimalPbufferWidth = 0;
c->base.optimalPbufferHeight = 0;
c->base.bindToMipmapTexture = 0;
c->base.bindToTextureTargets = GLX_DONT_CARE;
c->base.swapMethod = GLX_SWAP_UNDEFINED_OML;
/* this is... suspect */
c->base.drawableType = GLX_WINDOW_BIT | GLX_PIXMAP_BIT | GLX_PBUFFER_BIT;
/* hmm */
c->base.bindToTextureRgb = GL_TRUE;
c->base.bindToTextureRgba = GL_TRUE;
/*
* glx conformance failure: there's no such thing as accumulation
* buffers in EGL. they should be emulable with shaders and fbos,
* but i'm pretty sure nobody's using this feature since it's
* entirely software. note that glx conformance merely requires
* that an accum buffer _exist_, not a minimum bitness.
*/
c->base.accumRedBits = 0;
c->base.accumGreenBits = 0;
c->base.accumBlueBits = 0;
c->base.accumAlphaBits = 0;
/* parametric state */
if (direct_color)
c->base.visualType = GLX_DIRECT_COLOR;
else
c->base.visualType = GLX_TRUE_COLOR;
if (double_buffer)
c->base.doubleBufferMode = GL_TRUE;
else
c->base.doubleBufferMode = GL_FALSE;
/* direct-mapped state */
#define GET(attr, slot) \
eglGetConfigAttrib(screen->display, hc, attr, &c->base.slot)
GET(EGL_RED_SIZE, redBits);
GET(EGL_GREEN_SIZE, greenBits);
GET(EGL_BLUE_SIZE, blueBits);
GET(EGL_ALPHA_SIZE, alphaBits);
GET(EGL_BUFFER_SIZE, rgbBits);
GET(EGL_DEPTH_SIZE, depthBits);
GET(EGL_STENCIL_SIZE, stencilBits);
GET(EGL_TRANSPARENT_RED_VALUE, transparentRed);
GET(EGL_TRANSPARENT_GREEN_VALUE, transparentGreen);
GET(EGL_TRANSPARENT_BLUE_VALUE, transparentBlue);
GET(EGL_SAMPLE_BUFFERS, sampleBuffers);
GET(EGL_SAMPLES, samples);
if (c->base.renderType & GLX_PBUFFER_BIT) {
GET(EGL_MAX_PBUFFER_WIDTH, maxPbufferWidth);
GET(EGL_MAX_PBUFFER_HEIGHT, maxPbufferHeight);
GET(EGL_MAX_PBUFFER_PIXELS, maxPbufferPixels);
}
#undef GET
/* Only expose this config if rgbBits matches a supported
* depth value.
*/
valid_depth = false;
for (i = 0; i < pScreen->numDepths && !valid_depth; i++) {
if (pScreen->allowedDepths[i].depth == c->base.rgbBits)
valid_depth = true;
}
if (!valid_depth) {
free(c);
return chain;
}
/* derived state: config caveats */
eglGetConfigAttrib(screen->display, hc, EGL_CONFIG_CAVEAT, &value);
if (value == EGL_NONE)
c->base.visualRating = GLX_NONE;
else if (value == EGL_SLOW_CONFIG)
c->base.visualRating = GLX_SLOW_CONFIG;
else if (value == EGL_NON_CONFORMANT_CONFIG)
c->base.visualRating = GLX_NON_CONFORMANT_CONFIG;
/* else panic */
/* derived state: float configs */
c->base.renderType = GLX_RGBA_BIT;
if (eglGetConfigAttrib(screen->display, hc, EGL_COLOR_COMPONENT_TYPE_EXT,
&value) == EGL_TRUE) {
if (value == EGL_COLOR_COMPONENT_TYPE_FLOAT_EXT) {
c->base.renderType = GLX_RGBA_FLOAT_BIT_ARB;
}
/* else panic */
}
/* derived state: sRGB. EGL doesn't put this in the fbconfig at all,
* it's a property of the surface specified at creation time, so we have
* to infer it from the GL's extensions. only makes sense at 8bpc though.
*/
if (srgb_only) {
if (c->base.redBits == 8) {
c->base.sRGBCapable = GL_TRUE;
} else {
free(c);
return chain;
}
}
/* map to the backend's config */
c->config = hc;
/*
* XXX do something less ugly
*/
if (c->base.renderType == GLX_RGBA_BIT) {
if (c->base.redBits == 5 &&
(c->base.rgbBits == 15 || c->base.rgbBits == 16)) {
c->base.blueMask = 0x0000001f;
if (c->base.alphaBits) {
c->base.greenMask = 0x000003e0;
c->base.redMask = 0x00007c00;
c->base.alphaMask = 0x00008000;
} else {
c->base.greenMask = 0x000007e0;
c->base.redMask = 0x0000f800;
c->base.alphaMask = 0x00000000;
}
}
else if (c->base.redBits == 8 &&
(c->base.rgbBits == 24 || c->base.rgbBits == 32)) {
c->base.blueMask = 0x000000ff;
c->base.greenMask = 0x0000ff00;
c->base.redMask = 0x00ff0000;
if (c->base.alphaBits)
/* assume all remaining bits are alpha */
c->base.alphaMask = 0xff000000;
}
else if (c->base.redBits == 10 &&
(c->base.rgbBits == 30 || c->base.rgbBits == 32)) {
c->base.blueMask = 0x000003ff;
c->base.greenMask = 0x000ffc00;
c->base.redMask = 0x3ff00000;
if (c->base.alphaBits)
/* assume all remaining bits are alpha */
c->base.alphaMask = 0xc000000;
}
}
/*
* Here we decide which fbconfigs will be duplicated for compositing.
* fgbconfigs marked with duplicatedForComp will be reserved for
* compositing visuals.
* It might look strange to do this decision this late when translation
* from an EGLConfig is already done, but using the EGLConfig
* accessor functions becomes worse both with respect to code complexity
* and CPU usage.
*/
if (duplicate_for_composite &&
(c->base.renderType == GLX_RGBA_FLOAT_BIT_ARB ||
c->base.rgbBits != 32 ||
c->base.redBits != 8 ||
c->base.greenBits != 8 ||
c->base.blueBits != 8 ||
c->base.visualRating != GLX_NONE ||
c->base.sampleBuffers != 0)) {
free(c);
return chain;
}
c->base.duplicatedForComp = duplicate_for_composite;
c->base.next = chain ? &chain->base : NULL;
return c;
}
static __GLXconfig *
egl_mirror_configs(ScreenPtr pScreen, struct egl_screen *screen)
{
int i, j, k, nconfigs;
struct egl_config *c = NULL;
EGLConfig *host_configs = NULL;
bool can_srgb = epoxy_has_gl_extension("GL_ARB_framebuffer_sRGB") ||
epoxy_has_gl_extension("GL_EXT_framebuffer_sRGB") ||
epoxy_has_gl_extension("GL_EXT_sRGB_write_control");
eglGetConfigs(screen->display, NULL, 0, &nconfigs);
if (!(host_configs = calloc(nconfigs, sizeof *host_configs)))
return NULL;
eglGetConfigs(screen->display, host_configs, nconfigs, &nconfigs);
/* We walk the EGL configs backwards to make building the
* ->next chain easier.
*/
for (i = nconfigs - 1; i >= 0; i--)
for (j = 0; j < 3; j++) /* direct_color */
for (k = 0; k < 2; k++) /* double_buffer */ {
if (can_srgb)
c = translate_eglconfig(pScreen, screen, host_configs[i], c,
/* direct_color */ j == 1,
/* double_buffer */ k > 0,
/* duplicate_for_composite */ j == 0,
/* srgb_only */ true);
c = translate_eglconfig(pScreen, screen, host_configs[i], c,
/* direct_color */ j == 1,
/* double_buffer */ k > 0,
/* duplicate_for_composite */ j == 0,
/* srgb_only */ false);
}
screen->configs = host_configs;
return c ? &c->base : NULL;
}
static __GLXscreen *
egl_screen_probe(ScreenPtr pScreen)
{
struct egl_screen *screen;
glamor_screen_private *glamor_screen;
__GLXscreen *base;
if (enableIndirectGLX)
return NULL; /* not implemented */
glamor_screen = glamor_get_screen_private(pScreen);
if (!glamor_screen)
return NULL;
if (!(screen = calloc(1, sizeof *screen)))
return NULL;
base = &screen->base;
base->destroy = egl_screen_destroy;
base->createDrawable = egl_create_glx_drawable;
/* base.swapInterval = NULL; */
screen->display = glamor_screen->ctx.display;
__glXInitExtensionEnableBits(screen->base.glx_enable_bits);
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_context_flush_control");
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_create_context");
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_create_context_no_error");
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_create_context_profile");
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_create_context_robustness");
__glXEnableExtension(base->glx_enable_bits, "GLX_ARB_fbconfig_float");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_create_context_es2_profile");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_create_context_es_profile");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_fbconfig_packed_float");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_framebuffer_sRGB");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_no_config_context");
__glXEnableExtension(base->glx_enable_bits, "GLX_EXT_texture_from_pixmap");
__glXEnableExtension(base->glx_enable_bits, "GLX_MESA_copy_sub_buffer");
// __glXEnableExtension(base->glx_enable_bits, "GLX_SGI_swap_control");
base->fbconfigs = egl_mirror_configs(pScreen, screen);
if (!base->fbconfigs) {
free(screen);
return NULL;
}
if (!screen->base.glvnd && glamor_screen->glvnd_vendor)
screen->base.glvnd = strdup(glamor_screen->glvnd_vendor);
if (!screen->base.glvnd)
screen->base.glvnd = strdup("mesa");
__glXScreenInit(base, pScreen);
__glXsetGetProcAddress(eglGetProcAddress);
return base;
}
__GLXprovider glamor_provider = {
egl_screen_probe,
"glamor",
NULL
};
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