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gfx/skia/trunk/src/gpu/gl/android/SkNativeGLContext_android.cpp@b8a032363ba2 (annotated)

gfx/skia/trunk/src/gpu/gl/android/SkNativeGLContext_android.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1
michael@0	2	/*
michael@0	3	* Copyright 2011 Google Inc.
michael@0	4	*
michael@0	5	* Use of this source code is governed by a BSD-style license that can be
michael@0	6	* found in the LICENSE file.
michael@0	7	*/
michael@0	8	#include "gl/SkNativeGLContext.h"
michael@0	9
michael@0	10	SkNativeGLContext::AutoContextRestore::AutoContextRestore() {
michael@0	11	fOldEGLContext = eglGetCurrentContext();
michael@0	12	fOldDisplay = eglGetCurrentDisplay();
michael@0	13	fOldSurface = eglGetCurrentSurface(EGL_DRAW);
michael@0	14
michael@0	15	}
michael@0	16
michael@0	17	SkNativeGLContext::AutoContextRestore::~AutoContextRestore() {
michael@0	18	if (NULL != fOldDisplay) {
michael@0	19	eglMakeCurrent(fOldDisplay, fOldSurface, fOldSurface, fOldEGLContext);
michael@0	20	}
michael@0	21	}
michael@0	22
michael@0	23	///////////////////////////////////////////////////////////////////////////////
michael@0	24
michael@0	25	SkNativeGLContext::SkNativeGLContext()
michael@0	26	: fContext(EGL_NO_CONTEXT)
michael@0	27	, fDisplay(EGL_NO_DISPLAY)
michael@0	28	, fSurface(EGL_NO_SURFACE) {
michael@0	29	}
michael@0	30
michael@0	31	SkNativeGLContext::~SkNativeGLContext() {
michael@0	32	this->destroyGLContext();
michael@0	33	}
michael@0	34
michael@0	35	void SkNativeGLContext::destroyGLContext() {
michael@0	36	if (fDisplay) {
michael@0	37	eglMakeCurrent(fDisplay, 0, 0, 0);
michael@0	38
michael@0	39	if (fContext) {
michael@0	40	eglDestroyContext(fDisplay, fContext);
michael@0	41	fContext = EGL_NO_CONTEXT;
michael@0	42	}
michael@0	43
michael@0	44	if (fSurface) {
michael@0	45	eglDestroySurface(fDisplay, fSurface);
michael@0	46	fSurface = EGL_NO_SURFACE;
michael@0	47	}
michael@0	48
michael@0	49	//TODO should we close the display?
michael@0	50	fDisplay = EGL_NO_DISPLAY;
michael@0	51	}
michael@0	52	}
michael@0	53
michael@0	54	const GrGLInterface* SkNativeGLContext::createGLContext() {
michael@0	55	static const EGLint kEGLContextAttribsForOpenGL[] = {
michael@0	56	EGL_NONE
michael@0	57	};
michael@0	58
michael@0	59	static const EGLint kEGLContextAttribsForOpenGLES[] = {
michael@0	60	EGL_CONTEXT_CLIENT_VERSION, 2,
michael@0	61	EGL_NONE
michael@0	62	};
michael@0	63
michael@0	64	static const struct {
michael@0	65	const EGLint* fContextAttribs;
michael@0	66	EGLenum fAPI;
michael@0	67	EGLint fRenderableTypeBit;
michael@0	68	GrGLStandard fStandard;
michael@0	69	} kAPIs[] = {
michael@0	70	{ // OpenGL
michael@0	71	kEGLContextAttribsForOpenGL,
michael@0	72	EGL_OPENGL_API,
michael@0	73	EGL_OPENGL_BIT,
michael@0	74	kGL_GrGLStandard
michael@0	75	},
michael@0	76	{ // OpenGL ES. This seems to work for both ES2 and 3 (when available).
michael@0	77	kEGLContextAttribsForOpenGLES,
michael@0	78	EGL_OPENGL_ES_API,
michael@0	79	EGL_OPENGL_ES2_BIT,
michael@0	80	kGLES_GrGLStandard
michael@0	81	},
michael@0	82	};
michael@0	83
michael@0	84	const GrGLInterface* interface = NULL;
michael@0	85
michael@0	86	for (size_t api = 0; NULL == interface && api < SK_ARRAY_COUNT(kAPIs); ++api) {
michael@0	87	fDisplay = eglGetDisplay(EGL_DEFAULT_DISPLAY);
michael@0	88
michael@0	89	EGLint majorVersion;
michael@0	90	EGLint minorVersion;
michael@0	91	eglInitialize(fDisplay, &majorVersion, &minorVersion);
michael@0	92
michael@0	93	#if 0
michael@0	94	SkDebugf("VENDOR: %s\n", eglQueryString(fDisplay, EGL_VENDOR));
michael@0	95	SkDebugf("APIS: %s\n", eglQueryString(fDisplay, EGL_CLIENT_APIS));
michael@0	96	SkDebugf("VERSION: %s\n", eglQueryString(fDisplay, EGL_VERSION));
michael@0	97	SkDebugf("EXTENSIONS %s\n", eglQueryString(fDisplay, EGL_EXTENSIONS));
michael@0	98	#endif
michael@0	99
michael@0	100	if (!eglBindAPI(kAPIs[api].fAPI)) {
michael@0	101	continue;
michael@0	102	}
michael@0	103
michael@0	104	EGLint numConfigs;
michael@0	105	const EGLint configAttribs[] = {
michael@0	106	EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
michael@0	107	EGL_RENDERABLE_TYPE, kAPIs[api].fRenderableTypeBit,
michael@0	108	EGL_RED_SIZE, 8,
michael@0	109	EGL_GREEN_SIZE, 8,
michael@0	110	EGL_BLUE_SIZE, 8,
michael@0	111	EGL_ALPHA_SIZE, 8,
michael@0	112	EGL_NONE
michael@0	113	};
michael@0	114
michael@0	115	EGLConfig surfaceConfig;
michael@0	116	if (!eglChooseConfig(fDisplay, configAttribs, &surfaceConfig, 1, &numConfigs)) {
michael@0	117	SkDebugf("eglChooseConfig failed. EGL Error: 0x%08x\n", eglGetError());
michael@0	118	continue;
michael@0	119	}
michael@0	120
michael@0	121	fContext = eglCreateContext(fDisplay, surfaceConfig, NULL, kAPIs[api].fContextAttribs);
michael@0	122	if (EGL_NO_CONTEXT == fContext) {
michael@0	123	SkDebugf("eglCreateContext failed. EGL Error: 0x%08x\n", eglGetError());
michael@0	124	continue;
michael@0	125	}
michael@0	126
michael@0	127	static const EGLint kSurfaceAttribs[] = {
michael@0	128	EGL_WIDTH, 1,
michael@0	129	EGL_HEIGHT, 1,
michael@0	130	EGL_NONE
michael@0	131	};
michael@0	132
michael@0	133	fSurface = eglCreatePbufferSurface(fDisplay, surfaceConfig, kSurfaceAttribs);
michael@0	134	if (EGL_NO_SURFACE == fSurface) {
michael@0	135	SkDebugf("eglCreatePbufferSurface failed. EGL Error: 0x%08x\n", eglGetError());
michael@0	136	this->destroyGLContext();
michael@0	137	continue;
michael@0	138	}
michael@0	139
michael@0	140	if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
michael@0	141	SkDebugf("eglMakeCurrent failed. EGL Error: 0x%08x\n", eglGetError());
michael@0	142	this->destroyGLContext();
michael@0	143	continue;
michael@0	144	}
michael@0	145
michael@0	146	interface = GrGLCreateNativeInterface();
michael@0	147	if (NULL == interface) {
michael@0	148	SkDebugf("Failed to create gl interface.\n");
michael@0	149	this->destroyGLContext();
michael@0	150	continue;
michael@0	151	}
michael@0	152
michael@0	153	if (!interface->validate()) {
michael@0	154	interface->unref();
michael@0	155	interface = NULL;
michael@0	156	this->destroyGLContext();
michael@0	157	}
michael@0	158	}
michael@0	159
michael@0	160	return interface;
michael@0	161	}
michael@0	162
michael@0	163	void SkNativeGLContext::makeCurrent() const {
michael@0	164	if (!eglMakeCurrent(fDisplay, fSurface, fSurface, fContext)) {
michael@0	165	SkDebugf("Could not set the context.\n");
michael@0	166	}
michael@0	167	}
michael@0	168
michael@0	169	void SkNativeGLContext::swapBuffers() const {
michael@0	170	if (!eglSwapBuffers(fDisplay, fSurface)) {
michael@0	171	SkDebugf("Could not complete eglSwapBuffers.\n");
michael@0	172	}
michael@0	173	}