275 lines
9.1 KiB
C++
275 lines
9.1 KiB
C++
// Copyright (C) 2015 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "FbConfig.h"
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#include "OpenGLESDispatch/EGLDispatch.h"
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#include <stdio.h>
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#include <string.h>
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namespace {
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#define E(...) fprintf(stderr, __VA_ARGS__)
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const GLuint kConfigAttributes[] = {
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EGL_DEPTH_SIZE, // must be first - see getDepthSize()
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EGL_STENCIL_SIZE, // must be second - see getStencilSize()
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EGL_RENDERABLE_TYPE,// must be third - see getRenderableType()
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EGL_SURFACE_TYPE, // must be fourth - see getSurfaceType()
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EGL_CONFIG_ID, // must be fifth - see chooseConfig()
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EGL_BUFFER_SIZE,
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EGL_ALPHA_SIZE,
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EGL_BLUE_SIZE,
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EGL_GREEN_SIZE,
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EGL_RED_SIZE,
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EGL_CONFIG_CAVEAT,
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EGL_LEVEL,
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EGL_MAX_PBUFFER_HEIGHT,
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EGL_MAX_PBUFFER_PIXELS,
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EGL_MAX_PBUFFER_WIDTH,
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EGL_NATIVE_RENDERABLE,
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EGL_NATIVE_VISUAL_ID,
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EGL_NATIVE_VISUAL_TYPE,
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EGL_SAMPLES,
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EGL_SAMPLE_BUFFERS,
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EGL_TRANSPARENT_TYPE,
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EGL_TRANSPARENT_BLUE_VALUE,
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EGL_TRANSPARENT_GREEN_VALUE,
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EGL_TRANSPARENT_RED_VALUE,
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EGL_BIND_TO_TEXTURE_RGB,
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EGL_BIND_TO_TEXTURE_RGBA,
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EGL_MIN_SWAP_INTERVAL,
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EGL_MAX_SWAP_INTERVAL,
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EGL_LUMINANCE_SIZE,
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EGL_ALPHA_MASK_SIZE,
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EGL_COLOR_BUFFER_TYPE,
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//EGL_MATCH_NATIVE_PIXMAP,
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EGL_CONFORMANT
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};
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const size_t kConfigAttributesLen =
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sizeof(kConfigAttributes) / sizeof(kConfigAttributes[0]);
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bool isCompatibleHostConfig(EGLConfig config, EGLDisplay display) {
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// Filter out configs which do not support pbuffers, since they
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// are used to implement window surfaces.
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EGLint surfaceType;
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s_egl.eglGetConfigAttrib(
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display, config, EGL_SURFACE_TYPE, &surfaceType);
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if (!(surfaceType & EGL_PBUFFER_BIT)) {
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return false;
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}
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// Filter out configs that do not support RGB pixel values.
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EGLint redSize = 0, greenSize = 0, blueSize = 0, alphaSize = 0;
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s_egl.eglGetConfigAttrib(
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display, config,EGL_RED_SIZE, &redSize);
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s_egl.eglGetConfigAttrib(
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display, config, EGL_GREEN_SIZE, &greenSize);
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s_egl.eglGetConfigAttrib(
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display, config, EGL_BLUE_SIZE, &blueSize);
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s_egl.eglGetConfigAttrib(
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display, config, EGL_ALPHA_SIZE, &alphaSize);
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if (!redSize || !greenSize || !blueSize || !alphaSize) {
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return false;
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}
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return true;
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}
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} // namespace
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FbConfig::~FbConfig() {
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delete [] mAttribValues;
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}
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FbConfig::FbConfig(EGLConfig hostConfig, EGLDisplay hostDisplay) :
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mEglConfig(hostConfig), mAttribValues(NULL) {
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mAttribValues = new GLint[kConfigAttributesLen];
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for (size_t i = 0; i < kConfigAttributesLen; ++i) {
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mAttribValues[i] = 0;
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s_egl.eglGetConfigAttrib(hostDisplay,
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hostConfig,
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kConfigAttributes[i],
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&mAttribValues[i]);
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// This implementation supports guest window surfaces by wrapping
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// them around host Pbuffers, so always report it to the guest.
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if (kConfigAttributes[i] == EGL_SURFACE_TYPE) {
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mAttribValues[i] |= EGL_WINDOW_BIT;
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}
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}
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}
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FbConfigList::FbConfigList(EGLDisplay display) :
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mCount(0), mConfigs(NULL), mDisplay(display) {
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if (display == EGL_NO_DISPLAY) {
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E("%s: Invalid display value %p (EGL_NO_DISPLAY)\n",
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__FUNCTION__, (void*)display);
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return;
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}
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EGLint numHostConfigs = 0;
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if (!s_egl.eglGetConfigs(display, NULL, 0, &numHostConfigs)) {
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E("%s: Could not get number of host EGL configs\n", __FUNCTION__);
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return;
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}
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EGLConfig* hostConfigs = new EGLConfig[numHostConfigs];
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s_egl.eglGetConfigs(display, hostConfigs, numHostConfigs, &numHostConfigs);
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mConfigs = new FbConfig*[numHostConfigs];
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for (EGLint i = 0; i < numHostConfigs; ++i) {
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// Filter out configs that are not compatible with our implementation.
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if (!isCompatibleHostConfig(hostConfigs[i], display)) {
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continue;
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}
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mConfigs[mCount] = new FbConfig(hostConfigs[i], display);
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mCount++;
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}
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delete [] hostConfigs;
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}
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FbConfigList::~FbConfigList() {
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for (int n = 0; n < mCount; ++n) {
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delete mConfigs[n];
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}
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delete [] mConfigs;
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}
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int FbConfigList::chooseConfig(const EGLint* attribs,
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EGLint* configs,
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EGLint configsSize) const {
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EGLint numHostConfigs = 0;
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if (!s_egl.eglGetConfigs(mDisplay, NULL, 0, &numHostConfigs)) {
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E("%s: Could not get number of host EGL configs\n", __FUNCTION__);
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return 0;
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}
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EGLConfig* matchedConfigs = new EGLConfig[numHostConfigs];
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// If EGL_SURFACE_TYPE appears in |attribs|, the value passed to
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// eglChooseConfig should be forced to EGL_PBUFFER_BIT because that's
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// what it used by the current implementation, exclusively. This forces
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// the rewrite of |attribs| into a new array.
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bool hasSurfaceType = false;
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bool mustReplaceSurfaceType = false;
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int numAttribs = 0;
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while (attribs[numAttribs] != EGL_NONE) {
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if (attribs[numAttribs] == EGL_SURFACE_TYPE) {
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hasSurfaceType = true;
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if (attribs[numAttribs + 1] != EGL_PBUFFER_BIT) {
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mustReplaceSurfaceType = true;
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}
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}
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numAttribs += 2;
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}
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EGLint* newAttribs = NULL;
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if (mustReplaceSurfaceType) {
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// There is at least on EGL_SURFACE_TYPE in |attribs|. Copy the
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// array and replace all values with EGL_PBUFFER_BIT
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newAttribs = new GLint[numAttribs + 1];
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memcpy(newAttribs, attribs, numAttribs * sizeof(GLint));
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newAttribs[numAttribs] = EGL_NONE;
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for (int n = 0; n < numAttribs; n += 2) {
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if (newAttribs[n] == EGL_SURFACE_TYPE) {
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newAttribs[n + 1] = EGL_PBUFFER_BIT;
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}
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}
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} else if (!hasSurfaceType) {
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// There is no EGL_SURFACE_TYPE in |attribs|, then add one entry
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// with the value EGL_PBUFFER_BIT.
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newAttribs = new GLint[numAttribs + 3];
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memcpy(newAttribs, attribs, numAttribs * sizeof(GLint));
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newAttribs[numAttribs] = EGL_SURFACE_TYPE;
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newAttribs[numAttribs + 1] = EGL_PBUFFER_BIT;
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newAttribs[numAttribs + 2] = EGL_NONE;
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}
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if (!s_egl.eglChooseConfig(mDisplay,
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newAttribs ? newAttribs : attribs,
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matchedConfigs,
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numHostConfigs,
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&numHostConfigs)) {
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numHostConfigs = 0;
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}
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delete [] newAttribs;
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int result = 0;
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for (int n = 0; n < numHostConfigs; ++n) {
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// Don't count or write more than |configsSize| items if |configs|
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// is not NULL.
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if (configs && configsSize > 0 && result >= configsSize) {
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break;
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}
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// Skip incompatible host configs.
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if (!isCompatibleHostConfig(matchedConfigs[n], mDisplay)) {
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continue;
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}
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// Find the FbConfig with the same EGL_CONFIG_ID
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EGLint hostConfigId;
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s_egl.eglGetConfigAttrib(
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mDisplay, matchedConfigs[n], EGL_CONFIG_ID, &hostConfigId);
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for (int k = 0; k < mCount; ++k) {
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int guestConfigId = mConfigs[k]->getConfigId();
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if (guestConfigId == hostConfigId) {
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// There is a match. Write it to |configs| if it is not NULL.
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if (configs && result < configsSize) {
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configs[result] = (uint32_t)k;
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}
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result ++;
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break;
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}
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}
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}
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delete [] matchedConfigs;
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return result;
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}
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void FbConfigList::getPackInfo(EGLint* numConfigs,
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EGLint* numAttributes) const {
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if (numConfigs) {
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*numConfigs = mCount;
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}
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if (numAttributes) {
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*numAttributes = static_cast<EGLint>(kConfigAttributesLen);
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}
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}
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EGLint FbConfigList::packConfigs(GLuint bufferByteSize, GLuint* buffer) const {
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GLuint numAttribs = static_cast<GLuint>(kConfigAttributesLen);
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GLuint kGLuintSize = static_cast<GLuint>(sizeof(GLuint));
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GLuint neededByteSize = (mCount + 1) * numAttribs * kGLuintSize;
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if (!buffer || bufferByteSize < neededByteSize) {
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return -neededByteSize;
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}
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// Write to the buffer the config attribute ids, followed for each one
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// of the configs, their values.
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memcpy(buffer, kConfigAttributes, kConfigAttributesLen * kGLuintSize);
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for (int i = 0; i < mCount; ++i) {
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memcpy(buffer + (i + 1) * kConfigAttributesLen,
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mConfigs[i]->mAttribValues,
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kConfigAttributesLen * kGLuintSize);
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}
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return mCount;
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}
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