Remove points from fixed function.

Add basic GL performance test.

Change-Id: I421a41b6683b2c5f70045cdd0f610a6939105fee

3 files changed, 644 insertions, 0 deletions

diff --git a/opengl/tests/gl_perf/Android.mk b/opengl/tests/gl_perf/Android.mk
new file mode 100644
index 0000000..37647ca
--- /dev/null
+++ b/opengl/tests/gl_perf/Android.mk
@@ -0,0 +1,20 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+	gl2_perf.cpp \
+	filltest.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+	libcutils \
+    libEGL \
+    libGLESv2 \
+    libui
+
+LOCAL_MODULE:= test-opengl-gl2_perf
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_CFLAGS := -DGL_GLEXT_PROTOTYPES
+
+include $(BUILD_EXECUTABLE)
diff --git a/opengl/tests/gl_perf/filltest.cpp b/opengl/tests/gl_perf/filltest.cpp
new file mode 100644
index 0000000..ef85807
--- /dev/null
+++ b/opengl/tests/gl_perf/filltest.cpp
@@ -0,0 +1,382 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <sched.h>
+#include <sys/resource.h>
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <utils/Timers.h>
+#include <EGL/egl.h>
+
+
+using namespace android;
+
+static void checkGlError(const char* op) {
+    for (GLint error = glGetError(); error; error
+            = glGetError()) {
+        fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
+    }
+}
+
+GLuint loadShader(GLenum shaderType, const char* pSource) {
+    GLuint shader = glCreateShader(shaderType);
+    if (shader) {
+        glShaderSource(shader, 1, &pSource, NULL);
+        glCompileShader(shader);
+        GLint compiled = 0;
+        glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
+        if (!compiled) {
+            GLint infoLen = 0;
+            glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
+            if (infoLen) {
+                char* buf = (char*) malloc(infoLen);
+                if (buf) {
+                    glGetShaderInfoLog(shader, infoLen, NULL, buf);
+                    fprintf(stderr, "Could not compile shader %d:\n%s\n",
+                            shaderType, buf);
+                    free(buf);
+                }
+                glDeleteShader(shader);
+                shader = 0;
+            }
+        }
+    }
+    return shader;
+}
+
+enum {
+    A_POS,
+    A_COLOR,
+    A_TEX0,
+    A_TEX1
+};
+
+GLuint createProgram(const char* pVertexSource, const char* pFragmentSource) {
+    GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
+    if (!vertexShader) {
+        return 0;
+    }
+
+    GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
+    if (!pixelShader) {
+        return 0;
+    }
+
+    GLuint program = glCreateProgram();
+    if (program) {
+        glAttachShader(program, vertexShader);
+        checkGlError("glAttachShader v");
+        glAttachShader(program, pixelShader);
+        checkGlError("glAttachShader p");
+
+        glBindAttribLocation(program, A_POS, "a_pos");
+        glBindAttribLocation(program, A_COLOR, "a_color");
+        glBindAttribLocation(program, A_TEX0, "a_tex0");
+        glBindAttribLocation(program, A_TEX1, "a_tex1");
+        glLinkProgram(program);
+        GLint linkStatus = GL_FALSE;
+        glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
+        if (linkStatus != GL_TRUE) {
+            GLint bufLength = 0;
+            glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
+            if (bufLength) {
+                char* buf = (char*) malloc(bufLength);
+                if (buf) {
+                    glGetProgramInfoLog(program, bufLength, NULL, buf);
+                    printf("Could not link program:\n%s\n", buf);
+                    free(buf);
+                }
+            }
+            glDeleteProgram(program);
+            program = 0;
+        }
+    }
+    checkGlError("createProgram");
+    glUseProgram(program);
+    return program;
+}
+
+uint64_t getTime() {
+    struct timespec t;
+    clock_gettime(CLOCK_MONOTONIC, &t);
+    return t.tv_nsec + ((uint64_t)t.tv_sec * 1000 * 1000 * 1000);
+}
+
+uint64_t gTime;
+void startTimer() {
+    gTime = getTime();
+}
+
+void endTimer(const char *str, int w, int h, double dc, int count) {
+    uint64_t t2 = getTime();
+    double delta = ((double)(t2 - gTime)) / 1000000000;
+    double pixels = dc * (w * h) * count;
+    double mpps = pixels / delta / 1000000;
+    double dc60 = pixels / delta / (w * h) / 60;
+
+    printf("test %s, Mpps %f, dc = %f\n", str, mpps, dc60);
+}
+
+static const char gVertexShader[] =
+    "attribute vec4 a_pos;\n"
+    "attribute vec4 a_color;\n"
+    "attribute vec2 a_tex0;\n"
+    "attribute vec2 a_tex1;\n"
+    "varying vec4 v_color;\n"
+    "varying vec2 v_tex0;\n"
+    "varying vec2 v_tex1;\n"
+
+    "void main() {\n"
+    "    v_color = a_color;\n"
+    "    v_tex0 = a_tex0;\n"
+    "    v_tex1 = a_tex1;\n"
+    "    gl_Position = a_pos;\n"
+    "}\n";
+
+static const char gShaderPrefix[] =
+    "precision mediump float;\n"
+    "uniform vec4 u_color;\n"
+    "uniform vec4 u_0;\n"
+    "uniform vec4 u_1;\n"
+    "uniform vec4 u_2;\n"
+    "uniform vec4 u_3;\n"
+    "varying vec4 v_color;\n"
+    "varying vec2 v_tex0;\n"
+    "varying vec2 v_tex1;\n"
+    "uniform sampler2D u_tex0;\n"
+    "uniform sampler2D u_tex1;\n"
+    "void main() {\n";
+
+static const char gShaderPostfix[] =
+    "  gl_FragColor = c;\n"
+    "}\n";
+
+
+static char * append(char *d, const char *s) {
+    size_t len = strlen(s);
+    memcpy(d, s, len);
+    return d + len;
+}
+
+static char * genShader(
+    bool useVarColor,
+    int texCount,
+    bool modulateFirstTex,
+    int extraMath)
+{
+    char *str = (char *)calloc(16 * 1024, 1);
+    char *tmp = append(str, gShaderPrefix);
+
+    if (modulateFirstTex || !texCount) {
+        if (useVarColor) {
+            tmp = append(tmp, "  vec4 c = v_color;\n");
+        } else {
+            tmp = append(tmp, "  vec4 c = u_color;\n");
+        }
+    } else {
+        tmp = append(tmp, "  vec4 c = texture2D(u_tex0, v_tex0);\n");
+    }
+
+    if (modulateFirstTex && texCount) {
+        tmp = append(tmp, "  c *= texture2D(u_tex0, v_tex0);\n");
+    }
+    if (texCount > 1) {
+        tmp = append(tmp, "  c *= texture2D(u_tex1, v_tex1);\n");
+    }
+
+    if (extraMath > 0) {
+        tmp = append(tmp, "  c *= u_0;\n");
+    }
+    if (extraMath > 1) {
+        tmp = append(tmp, "  c *= u_1;\n");
+    }
+    if (extraMath > 2) {
+        tmp = append(tmp, "  c *= u_2;\n");
+    }
+    if (extraMath > 3) {
+        tmp = append(tmp, "  c *= u_3;\n");
+    }
+
+
+    tmp = append(tmp, gShaderPostfix);
+    tmp[0] = 0;
+
+    //printf("%s", str);
+    return str;
+}
+
+static void setupVA() {
+    static const float vtx[] = {
+        -2.0f,-1.0f,
+         1.0f,-1.0f,
+        -2.0f, 1.0f,
+         1.0f, 1.0f };
+    static const float color[] = {
+        1.0f,0.0f,1.0f,1.0f,
+        0.0f,0.0f,1.0f,1.0f,
+        1.0f,1.0f,0.0f,1.0f,
+        1.0f,1.0f,1.0f,1.0f };
+    static const float tex0[] = {
+        0.0f,0.0f,
+        1.0f,0.0f,
+        1.0f,1.0f,
+        0.0f,1.0f };
+    static const float tex1[] = {
+        1.0f,0.0f,
+        1.0f,1.0f,
+        0.0f,1.0f,
+        0.0f,0.0f };
+
+    glEnableVertexAttribArray(A_POS);
+    glEnableVertexAttribArray(A_COLOR);
+    glEnableVertexAttribArray(A_TEX0);
+    glEnableVertexAttribArray(A_TEX1);
+
+    glVertexAttribPointer(A_POS, 2, GL_FLOAT, false, 8, vtx);
+    glVertexAttribPointer(A_COLOR, 4, GL_FLOAT, false, 16, color);
+    glVertexAttribPointer(A_TEX0, 2, GL_FLOAT, false, 8, tex0);
+    glVertexAttribPointer(A_TEX1, 2, GL_FLOAT, false, 8, tex1);
+}
+
+//////////////////////////
+
+void ptSwap();
+
+static void doLoop(uint32_t w, uint32_t h, const char *str) {
+    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    ptSwap();
+    glFinish();
+
+    startTimer();
+    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
+    for (int ct=0; ct < 100; ct++) {
+        glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+    }
+    ptSwap();
+    glFinish();
+    endTimer(str, w, h, 1, 100);
+}
+
+static void doSingleTest(uint32_t w, uint32_t h,
+                         bool useVarColor,
+                         int texCount,
+                         bool modulateFirstTex,
+                         int extraMath,
+                         int tex0, int tex1) {
+    char *pgmTxt = genShader(useVarColor, texCount, modulateFirstTex, extraMath);
+    int pgm = createProgram(gVertexShader, pgmTxt);
+    if (!pgm) {
+        printf("error running test\n");
+        return;
+    }
+    int loc = glGetUniformLocation(pgm, "u_tex0");
+    //printf("loc = %i \n", loc);
+    if (loc >= 0) glUniform1i(loc, 0);
+    loc = glGetUniformLocation(pgm, "u_tex1");
+    if (loc >= 0) glUniform1i(loc, 1);
+
+    loc = glGetUniformLocation(pgm, "u_color");
+    if (loc >= 0) glUniform4f(loc, 1.f, 0.4f, 0.6f, 0.8f);
+
+    loc = glGetUniformLocation(pgm, "u_0");
+    if (loc >= 0) glUniform4f(loc, 1.f, 0.4f, 0.6f, 0.8f);
+
+    loc = glGetUniformLocation(pgm, "u_1");
+    if (loc >= 0) glUniform4f(loc, 0.7f, 0.8f, 0.6f, 0.8f);
+
+    loc = glGetUniformLocation(pgm, "u_2");
+    if (loc >= 0) glUniform4f(loc, 0.9f, 0.6f, 0.7f, 1.0f);
+
+    loc = glGetUniformLocation(pgm, "u_3");
+    if (loc >= 0) glUniform4f(loc, 0.88f, 0.2f, 0.4f, 0.2f);
+
+    glActiveTexture(GL_TEXTURE0);
+    glBindTexture(GL_TEXTURE_2D, tex0);
+    glActiveTexture(GL_TEXTURE1);
+    glBindTexture(GL_TEXTURE_2D, tex1);
+    glActiveTexture(GL_TEXTURE0);
+
+    char str2[1024];
+
+    glBlendFunc(GL_ONE, GL_ONE);
+    glDisable(GL_BLEND);
+    sprintf(str2, "Test varColor=%i, texCount=%i, modulate=%i, extraMath=%i, texSize=%i, blend=0",
+            useVarColor, texCount, modulateFirstTex, extraMath, tex0);
+    doLoop(w, h, str2);
+
+    glEnable(GL_BLEND);
+    sprintf(str2, "Test varColor=%i, texCount=%i, modulate=%i, extraMath=%i, texSize=%i, blend=1",
+            useVarColor, texCount, modulateFirstTex, extraMath, tex0);
+    doLoop(w, h, str2);
+}
+
+void genTextures() {
+    uint32_t *m = (uint32_t *)malloc(1024*1024*4);
+    for (int y=0; y < 1024; y++){
+        for (int x=0; x < 1024; x++){
+            m[y*1024 + x] = 0xff0000ff | ((x & 0xff) << 8) | (y << 16);
+        }
+    }
+    glBindTexture(GL_TEXTURE_2D, 1);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1024, 1024, 0, GL_RGBA, GL_UNSIGNED_BYTE, m);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+    for (int y=0; y < 16; y++){
+        for (int x=0; x < 16; x++){
+            m[y*16 + x] = 0xff0000ff | (x<<12) | (y<<20);
+        }
+    }
+    glBindTexture(GL_TEXTURE_2D, 2);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0, GL_RGBA, GL_UNSIGNED_BYTE, m);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+}
+
+bool doTest(uint32_t w, uint32_t h) {
+    setupVA();
+    genTextures();
+
+    for (int texCount = 0; texCount < 3; texCount++) {
+        for (int extraMath = 0; extraMath < 5; extraMath++) {
+
+            doSingleTest(w, h, false, texCount, false, extraMath, 1, 1);
+            doSingleTest(w, h, true, texCount, false, extraMath, 1, 1);
+            if (texCount) {
+                doSingleTest(w, h, false, texCount, true, extraMath, 1, 1);
+                doSingleTest(w, h, true, texCount, true, extraMath, 1, 1);
+
+                doSingleTest(w, h, false, texCount, false, extraMath, 2, 2);
+                doSingleTest(w, h, true, texCount, false, extraMath, 2, 2);
+                doSingleTest(w, h, false, texCount, true, extraMath, 2, 2);
+                doSingleTest(w, h, true, texCount, true, extraMath, 2, 2);
+            }
+        }
+    }
+
+    exit(0);
+    return true;
+}
diff --git a/opengl/tests/gl_perf/gl2_perf.cpp b/opengl/tests/gl_perf/gl2_perf.cpp
new file mode 100644
index 0000000..ef30289
--- /dev/null
+++ b/opengl/tests/gl_perf/gl2_perf.cpp
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <sched.h>
+#include <sys/resource.h>
+
+#include <EGL/egl.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <utils/Timers.h>
+
+#include <ui/FramebufferNativeWindow.h>
+#include <ui/EGLUtils.h>
+
+using namespace android;
+
+static void printGLString(const char *name, GLenum s) {
+    // fprintf(stderr, "printGLString %s, %d\n", name, s);
+    const char *v = (const char *) glGetString(s);
+    // int error = glGetError();
+    // fprintf(stderr, "glGetError() = %d, result of glGetString = %x\n", error,
+    //        (unsigned int) v);
+    // if ((v < (const char*) 0) || (v > (const char*) 0x10000))
+    //    fprintf(stderr, "GL %s = %s\n", name, v);
+    // else
+    //    fprintf(stderr, "GL %s = (null) 0x%08x\n", name, (unsigned int) v);
+    fprintf(stderr, "GL %s = %s\n", name, v);
+}
+
+static void checkEglError(const char* op, EGLBoolean returnVal = EGL_TRUE) {
+    if (returnVal != EGL_TRUE) {
+        fprintf(stderr, "%s() returned %d\n", op, returnVal);
+    }
+
+    for (EGLint error = eglGetError(); error != EGL_SUCCESS; error
+            = eglGetError()) {
+        fprintf(stderr, "after %s() eglError %s (0x%x)\n", op, EGLUtils::strerror(error),
+                error);
+    }
+}
+
+static void checkGlError(const char* op) {
+    for (GLint error = glGetError(); error; error
+            = glGetError()) {
+        fprintf(stderr, "after %s() glError (0x%x)\n", op, error);
+    }
+}
+
+void printEGLConfiguration(EGLDisplay dpy, EGLConfig config) {
+
+#define X(VAL) {VAL, #VAL}
+    struct {EGLint attribute; const char* name;} names[] = {
+    X(EGL_BUFFER_SIZE),
+    X(EGL_ALPHA_SIZE),
+    X(EGL_BLUE_SIZE),
+    X(EGL_GREEN_SIZE),
+    X(EGL_RED_SIZE),
+    X(EGL_DEPTH_SIZE),
+    X(EGL_STENCIL_SIZE),
+    X(EGL_CONFIG_CAVEAT),
+    X(EGL_CONFIG_ID),
+    X(EGL_LEVEL),
+    X(EGL_MAX_PBUFFER_HEIGHT),
+    X(EGL_MAX_PBUFFER_PIXELS),
+    X(EGL_MAX_PBUFFER_WIDTH),
+    X(EGL_NATIVE_RENDERABLE),
+    X(EGL_NATIVE_VISUAL_ID),
+    X(EGL_NATIVE_VISUAL_TYPE),
+    X(EGL_SAMPLES),
+    X(EGL_SAMPLE_BUFFERS),
+    X(EGL_SURFACE_TYPE),
+    X(EGL_TRANSPARENT_TYPE),
+    X(EGL_TRANSPARENT_RED_VALUE),
+    X(EGL_TRANSPARENT_GREEN_VALUE),
+    X(EGL_TRANSPARENT_BLUE_VALUE),
+    X(EGL_BIND_TO_TEXTURE_RGB),
+    X(EGL_BIND_TO_TEXTURE_RGBA),
+    X(EGL_MIN_SWAP_INTERVAL),
+    X(EGL_MAX_SWAP_INTERVAL),
+    X(EGL_LUMINANCE_SIZE),
+    X(EGL_ALPHA_MASK_SIZE),
+    X(EGL_COLOR_BUFFER_TYPE),
+    X(EGL_RENDERABLE_TYPE),
+    X(EGL_CONFORMANT),
+   };
+#undef X
+
+    for (size_t j = 0; j < sizeof(names) / sizeof(names[0]); j++) {
+        EGLint value = -1;
+        EGLint returnVal = eglGetConfigAttrib(dpy, config, names[j].attribute, &value);
+        EGLint error = eglGetError();
+        if (returnVal && error == EGL_SUCCESS) {
+            printf(" %s: ", names[j].name);
+            printf("%d (0x%x)", value, value);
+        }
+    }
+    printf("\n");
+}
+
+int printEGLConfigurations(EGLDisplay dpy) {
+    EGLint numConfig = 0;
+    EGLint returnVal = eglGetConfigs(dpy, NULL, 0, &numConfig);
+    checkEglError("eglGetConfigs", returnVal);
+    if (!returnVal) {
+        return false;
+    }
+
+    printf("Number of EGL configuration: %d\n", numConfig);
+
+    EGLConfig* configs = (EGLConfig*) malloc(sizeof(EGLConfig) * numConfig);
+    if (! configs) {
+        printf("Could not allocate configs.\n");
+        return false;
+    }
+
+    returnVal = eglGetConfigs(dpy, configs, numConfig, &numConfig);
+    checkEglError("eglGetConfigs", returnVal);
+    if (!returnVal) {
+        free(configs);
+        return false;
+    }
+
+    for(int i = 0; i < numConfig; i++) {
+        printf("Configuration %d\n", i);
+        printEGLConfiguration(dpy, configs[i]);
+    }
+
+    free(configs);
+    return true;
+}
+
+bool doTest(uint32_t w, uint32_t h);
+
+static EGLDisplay dpy;
+static EGLSurface surface;
+
+int main(int argc, char** argv) {
+    EGLBoolean returnValue;
+    EGLConfig myConfig = {0};
+
+    EGLint context_attribs[] = { EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE };
+    EGLint s_configAttribs[] = {
+            EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+            EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+            EGL_NONE };
+    EGLint majorVersion;
+    EGLint minorVersion;
+    EGLContext context;
+    EGLint w, h;
+
+
+    checkEglError("<init>");
+    dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    checkEglError("eglGetDisplay");
+    if (dpy == EGL_NO_DISPLAY) {
+        printf("eglGetDisplay returned EGL_NO_DISPLAY.\n");
+        return 0;
+    }
+
+    returnValue = eglInitialize(dpy, &majorVersion, &minorVersion);
+    checkEglError("eglInitialize", returnValue);
+    fprintf(stderr, "EGL version %d.%d\n", majorVersion, minorVersion);
+    if (returnValue != EGL_TRUE) {
+        printf("eglInitialize failed\n");
+        return 0;
+    }
+
+    EGLNativeWindowType window = android_createDisplaySurface();

+    returnValue = EGLUtils::selectConfigForNativeWindow(dpy, s_configAttribs, window, &myConfig);
+    if (returnValue) {
+        printf("EGLUtils::selectConfigForNativeWindow() returned %d", returnValue);
+        return 0;
+    }
+
+    checkEglError("EGLUtils::selectConfigForNativeWindow");
+
+    printf("Chose this configuration:\n");
+    printEGLConfiguration(dpy, myConfig);
+
+    surface = eglCreateWindowSurface(dpy, myConfig, window, NULL);
+    checkEglError("eglCreateWindowSurface");
+    if (surface == EGL_NO_SURFACE) {
+        printf("gelCreateWindowSurface failed.\n");
+        return 0;
+    }
+
+    context = eglCreateContext(dpy, myConfig, EGL_NO_CONTEXT, context_attribs);
+    checkEglError("eglCreateContext");
+    if (context == EGL_NO_CONTEXT) {
+        printf("eglCreateContext failed\n");
+        return 0;
+    }
+    returnValue = eglMakeCurrent(dpy, surface, surface, context);
+    checkEglError("eglMakeCurrent", returnValue);
+    if (returnValue != EGL_TRUE) {
+        return 0;
+    }
+    eglQuerySurface(dpy, surface, EGL_WIDTH, &w);
+    checkEglError("eglQuerySurface");
+    eglQuerySurface(dpy, surface, EGL_HEIGHT, &h);
+    checkEglError("eglQuerySurface");
+    GLint dim = w < h ? w : h;
+
+    fprintf(stderr, "Window dimensions: %d x %d\n", w, h);
+
+    printGLString("Version", GL_VERSION);
+    printGLString("Vendor", GL_VENDOR);
+    printGLString("Renderer", GL_RENDERER);
+    printGLString("Extensions", GL_EXTENSIONS);
+
+    glViewport(0, 0, w, h);
+
+    for (;;) {
+        doTest(w, h);
+        eglSwapBuffers(dpy, surface);
+        checkEglError("eglSwapBuffers");
+    }
+
+    return 0;
+}
+
+void ptSwap() {
+    eglSwapBuffers(dpy, surface);
+}
+