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/*
* Copyright (C) 2009 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.
*/
#define LOG_TAG "EGLUtils"
#include <cutils/log.h>
#include <utils/Errors.h>
#include <ui/EGLUtils.h>
#include <EGL/egl.h>
#include <system/graphics.h>
#include <private/ui/android_natives_priv.h>
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
const char *EGLUtils::strerror(EGLint err)
{
switch (err){
case EGL_SUCCESS: return "EGL_SUCCESS";
case EGL_NOT_INITIALIZED: return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS: return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC: return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE: return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONFIG: return "EGL_BAD_CONFIG";
case EGL_BAD_CONTEXT: return "EGL_BAD_CONTEXT";
case EGL_BAD_CURRENT_SURFACE: return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_DISPLAY: return "EGL_BAD_DISPLAY";
case EGL_BAD_MATCH: return "EGL_BAD_MATCH";
case EGL_BAD_NATIVE_PIXMAP: return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW: return "EGL_BAD_NATIVE_WINDOW";
case EGL_BAD_PARAMETER: return "EGL_BAD_PARAMETER";
case EGL_BAD_SURFACE: return "EGL_BAD_SURFACE";
case EGL_CONTEXT_LOST: return "EGL_CONTEXT_LOST";
default: return "UNKNOWN";
}
}
status_t EGLUtils::selectConfigForPixelFormat(
EGLDisplay dpy,
EGLint const* attrs,
PixelFormat format,
EGLConfig* outConfig)
{
EGLint numConfigs = -1, n=0;
if (!attrs)
return BAD_VALUE;
if (outConfig == NULL)
return BAD_VALUE;
// Get all the "potential match" configs...
if (eglChooseConfig(dpy, attrs, 0, 0, &numConfigs) == EGL_FALSE)
return BAD_VALUE;
if (numConfigs) {
EGLConfig* const configs = new EGLConfig[numConfigs];
if (eglChooseConfig(dpy, attrs, configs, numConfigs, &n) == EGL_FALSE) {
delete [] configs;
return BAD_VALUE;
}
bool hasAlpha = false;
switch (format) {
case HAL_PIXEL_FORMAT_RGBA_8888:
case HAL_PIXEL_FORMAT_BGRA_8888:
case HAL_PIXEL_FORMAT_RGBA_5551:
case HAL_PIXEL_FORMAT_RGBA_4444:
hasAlpha = true;
break;
}
// The first config is guaranteed to over-satisfy the constraints
EGLConfig config = configs[0];
// go through the list and skip configs that over-satisfy our needs
int i;
for (i=0 ; i<n ; i++) {
if (!hasAlpha) {
EGLint alphaSize;
eglGetConfigAttrib(dpy, configs[i], EGL_ALPHA_SIZE, &alphaSize);
if (alphaSize > 0) {
continue;
}
}
config = configs[i];
break;
}
delete [] configs;
if (i<n) {
*outConfig = config;
return NO_ERROR;
}
}
return NAME_NOT_FOUND;
}
status_t EGLUtils::selectConfigForNativeWindow(
EGLDisplay dpy,
EGLint const* attrs,
EGLNativeWindowType window,
EGLConfig* outConfig)
{
int err;
int format;
if (!window)
return BAD_VALUE;
if ((err = window->query(window, NATIVE_WINDOW_FORMAT, &format)) < 0) {
return err;
}
return selectConfigForPixelFormat(dpy, attrs, format, outConfig);
}
// ----------------------------------------------------------------------------
}; // namespace android
// ----------------------------------------------------------------------------
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