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-rw-r--r--src/library_egl.js131
1 files changed, 102 insertions, 29 deletions
diff --git a/src/library_egl.js b/src/library_egl.js
index 0ccb13e6..69dd266d 100644
--- a/src/library_egl.js
+++ b/src/library_egl.js
@@ -9,10 +9,16 @@
var LibraryEGL = {
$EGL: {
// This variable tracks the success status of the most recently invoked EGL function call.
- eglErrorCode: 0x3000 /* EGL_SUCCESS */,
+ errorCode: 0x3000 /* EGL_SUCCESS */,
+ defaultDisplayInitialized: false,
+ currentContext: 0 /* EGL_NO_CONTEXT */,
+ currentReadSurface: 0 /* EGL_NO_SURFACE */,
+ currentDrawSurface: 0 /* EGL_NO_SURFACE */,
+
+ stringCache: {},
setErrorCode: function(code) {
- EGL.eglErrorCode = code;
+ EGL.errorCode = code;
},
chooseConfig: function(display, attribList, config, config_size, numConfigs) {
@@ -63,6 +69,7 @@ var LibraryEGL = {
if (minorVersion) {
{{{ makeSetValue('minorVersion', '0', '4', 'i32') }}}; // Advertise EGL Minor version: '4'
}
+ EGL.defaultDisplayInitialized = true;
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
return 1;
}
@@ -78,18 +85,10 @@ var LibraryEGL = {
EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
return 0;
}
- // TODO: Tear down EGL here. Currently a no-op since we don't need to actually do anything here for the browser.
- EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
- return 1;
- },
-
-// EGLAPI EGLBoolean EGLAPIENTRY eglTerminate(EGLDisplay dpy);
- eglTerminate: function(display) {
- if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
- EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
- return 0;
- }
- // TODO: Tear down EGL here. Currently a no-op since we don't need to actually do anything here for the browser.
+ EGL.currentContext = 0;
+ EGL.currentReadSurface = 0;
+ EGL.currentDrawSurface = 0;
+ EGL.defaultDisplayInitialized = false;
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
return 1;
},
@@ -170,10 +169,10 @@ var LibraryEGL = {
{{{ makeSetValue('value', '0', '0x3038' /* EGL_NONE */, 'i32') }}};
return 1;
case 0x3031: // EGL_SAMPLES
- {{{ makeSetValue('value', '0', '0' /* No multisampling. */, 'i32') }}};
+ {{{ makeSetValue('value', '0', '4' /* 2x2 Multisampling */, 'i32') }}};
return 1;
case 0x3032: // EGL_SAMPLE_BUFFERS
- {{{ makeSetValue('value', '0', '0' /* No multisampling. */, 'i32') }}};
+ {{{ makeSetValue('value', '0', '1' /* Multisampling enabled */, 'i32') }}};
return 1;
case 0x3033: // EGL_SURFACE_TYPE
{{{ makeSetValue('value', '0', '0x0004' /* EGL_WINDOW_BIT */, 'i32') }}};
@@ -246,11 +245,17 @@ var LibraryEGL = {
EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
return 1;
}
+ if (EGL.currentReadSurface == surface) {
+ EGL.currentReadSurface = 0;
+ }
+ if (EGL.currentDrawSurface == surface) {
+ EGL.currentDrawSurface = 0;
+ }
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
return 1; /* Magic ID for Emscripten 'default surface' */
},
- eglCreateContext__deps: ['glutCreateWindow', '$GL'],
+ eglCreateContext__deps: ['glutInitDisplayMode', 'glutCreateWindow', '$GL'],
// EGLAPI EGLContext EGLAPIENTRY eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list);
eglCreateContext: function(display, config, hmm, contextAttribs) {
@@ -259,9 +264,36 @@ var LibraryEGL = {
return 0;
}
+ // EGL 1.4 spec says default EGL_CONTEXT_CLIENT_VERSION is GLES1, but this is not supported by Emscripten.
+ // So user must pass EGL_CONTEXT_CLIENT_VERSION == 2 to initialize EGL.
+ var glesContextVersion = 1;
+ for(;;) {
+ var param = {{{ makeGetValue('contextAttribs', '0', 'i32') }}};
+ if (!param) break;
+ var value = {{{ makeGetValue('contextAttribs', '4', 'i32') }}};
+ if (param == 0x3098 /*EGL_CONTEXT_CLIENT_VERSION*/) {
+ glesContextVersion = value;
+ }
+ contextAttribs += 8;
+ }
+ if (glesContextVersion != 2) {
+#if GL_ASSERTIONS
+ Module.printErr('When initializing GLES2/WebGL1 via EGL, one must pass EGL_CONTEXT_CLIENT_VERSION = 2 to GL context attributes! GLES version ' + glesContextVersion + ' is not supported!');
+#endif
+ EGL.setErrorCode(0x3005 /* EGL_BAD_CONFIG */);
+ return 0; /* EGL_NO_CONTEXT */
+ }
+
+ _glutInitDisplayMode(0x92 /* GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE */);
EGL.windowID = _glutCreateWindow();
- EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
- return 62004; // Magic ID for Emscripten EGLContext
+ if (EGL.windowID != 0) {
+ EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
+ // Note: This function only creates a context, but it shall not make it active.
+ return 62004; // Magic ID for Emscripten EGLContext
+ } else {
+ EGL.setErrorCode(0x3009 /* EGL_BAD_MATCH */); // By the EGL 1.4 spec, an implementation that does not support GLES2 (WebGL in this case), this error code is set.
+ return 0; /* EGL_NO_CONTEXT */
+ }
},
eglDestroyContext__deps: ['glutDestroyWindow', '$GL'],
@@ -272,10 +304,17 @@ var LibraryEGL = {
EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
return 0;
}
+ if (context != 62004 /* Magic ID for Emscripten EGLContext */) {
+ EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
+ return 0;
+ }
_glutDestroyWindow(EGL.windowID);
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
- return 62004; // Magic ID for Emscripten EGLContext
+ if (EGL.currentContext == context) {
+ EGL.currentContext = 0;
+ }
+ return 1 /* EGL_TRUE */;
},
// EGLAPI EGLBoolean EGLAPIENTRY eglDestroyContext(EGLDisplay dpy, EGLContext ctx);
@@ -399,7 +438,7 @@ var LibraryEGL = {
// EGLAPI EGLint EGLAPIENTRY eglGetError(void);
eglGetError: function() {
- return EGL.eglErrorCode;
+ return EGL.errorCode;
},
// EGLAPI const char * EGLAPIENTRY eglQueryString(EGLDisplay dpy, EGLint name);
@@ -410,15 +449,19 @@ var LibraryEGL = {
}
//\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
+ if (EGL.stringCache[name]) return EGL.stringCache[name];
+ var ret;
switch(name) {
- case 0x3053 /* EGL_VENDOR */: return allocate(intArrayFromString("Emscripten"), 'i8', ALLOC_NORMAL);
- case 0x3054 /* EGL_VERSION */: return allocate(intArrayFromString("1.4 Emscripten EGL"), 'i8', ALLOC_NORMAL);
- case 0x3055 /* EGL_EXTENSIONS */: return allocate(intArrayFromString(""), 'i8', ALLOC_NORMAL); // Currently not supporting any EGL extensions.
- case 0x308D /* EGL_CLIENT_APIS */: return allocate(intArrayFromString("OpenGL_ES"), 'i8', ALLOC_NORMAL);
+ case 0x3053 /* EGL_VENDOR */: ret = allocate(intArrayFromString("Emscripten"), 'i8', ALLOC_NORMAL); break;
+ case 0x3054 /* EGL_VERSION */: ret = allocate(intArrayFromString("1.4 Emscripten EGL"), 'i8', ALLOC_NORMAL); break;
+ case 0x3055 /* EGL_EXTENSIONS */: ret = allocate(intArrayFromString(""), 'i8', ALLOC_NORMAL); break; // Currently not supporting any EGL extensions.
+ case 0x308D /* EGL_CLIENT_APIS */: ret = allocate(intArrayFromString("OpenGL_ES"), 'i8', ALLOC_NORMAL); break;
default:
EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
return 0;
}
+ EGL.stringCache[name] = ret;
+ return ret;
},
// EGLAPI EGLBoolean EGLAPIENTRY eglBindAPI(EGLenum api);
@@ -465,25 +508,55 @@ var LibraryEGL = {
eglMakeCurrent: function(display, draw, read, context) {
if (display != 62000 /* Magic ID for Emscripten 'default display' */) {
EGL.setErrorCode(0x3008 /* EGL_BAD_DISPLAY */);
- return 0;
+ return 0 /* EGL_FALSE */;
}
//\todo An EGL_NOT_INITIALIZED error is generated if EGL is not initialized for dpy.
- if (context != 62004 /* Magic ID for Emscripten EGLContext */) {
+ if (context != 0 && context != 62004 /* Magic ID for Emscripten EGLContext */) {
EGL.setErrorCode(0x3006 /* EGL_BAD_CONTEXT */);
return 0;
}
- if (read != 62006 || draw != 62006 /* Magic ID for Emscripten 'default surface' */) {
+ if ((read != 0 && read != 62006) || (draw != 0 && draw != 62006 /* Magic ID for Emscripten 'default surface' */)) {
EGL.setErrorCode(0x300D /* EGL_BAD_SURFACE */);
return 0;
}
+ EGL.currentContext = context;
+ EGL.currentDrawSurface = draw;
+ EGL.currentReadSurface = read;
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
- return 1;
+ return 1 /* EGL_TRUE */;
+ },
+
+ // EGLAPI EGLContext EGLAPIENTRY eglGetCurrentContext(void);
+ eglGetCurrentContext: function() {
+ return EGL.currentContext;
+ },
+
+ // EGLAPI EGLSurface EGLAPIENTRY eglGetCurrentSurface(EGLint readdraw);
+ eglGetCurrentSurface: function(readdraw) {
+ if (readdraw == 0x305A /* EGL_READ */) {
+ return EGL.currentReadSurface;
+ } else if (readdraw == 0x3059 /* EGL_DRAW */) {
+ return EGL.currentDrawSurface;
+ } else {
+ EGL.setErrorCode(0x300C /* EGL_BAD_PARAMETER */);
+ return 0 /* EGL_NO_SURFACE */;
+ }
},
+ // EGLAPI EGLDisplay EGLAPIENTRY eglGetCurrentDisplay(void);
+ eglGetCurrentDisplay: function() {
+ return EGL.currentContext ? 62000 /* Magic ID for Emscripten 'default display' */ : 0;
+ },
+
// EGLAPI EGLBoolean EGLAPIENTRY eglSwapBuffers(EGLDisplay dpy, EGLSurface surface);
eglSwapBuffers: function() {
EGL.setErrorCode(0x3000 /* EGL_SUCCESS */);
},
+
+ eglGetProcAddress__deps: ['emscripten_GetProcAddress'],
+ eglGetProcAddress: function(name_) {
+ return _emscripten_GetProcAddress(name_);
+ },
};
autoAddDeps(LibraryEGL, '$EGL');
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-07-24 11:10:18 +0000