347 lines
11 KiB
C++
347 lines
11 KiB
C++
/*
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**
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** Copyright 2008 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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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <GLES/egl.h>
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#include "egl_surface.h"
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#define LOGI(x...) do { printf("INFO: " x); } while (0)
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#define LOGW(x...) do { printf("WARN: " x); } while (0)
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#define LOGE(x...) do { printf("ERR: " x); } while (0)
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// ----------------------------------------------------------------------------
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egl_native_window_t* android_createDisplaySurface()
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{
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egl_native_window_t* s = new android::EGLDisplaySurface();
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s->memory_type = NATIVE_MEMORY_TYPE_GPU;
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return s;
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}
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#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
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#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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EGLDisplaySurface::EGLDisplaySurface()
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: EGLNativeSurface<EGLDisplaySurface>()
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{
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egl_native_window_t::version = sizeof(egl_native_window_t);
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egl_native_window_t::ident = 0;
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egl_native_window_t::incRef = &EGLDisplaySurface::hook_incRef;
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egl_native_window_t::decRef = &EGLDisplaySurface::hook_decRef;
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egl_native_window_t::swapBuffers = &EGLDisplaySurface::hook_swapBuffers;
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egl_native_window_t::setSwapRectangle = &EGLDisplaySurface::hook_setSwapRectangle;
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egl_native_window_t::nextBuffer = &EGLDisplaySurface::hook_nextBuffer;
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egl_native_window_t::connect = 0;
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egl_native_window_t::disconnect = 0;
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mFb[0].data = 0;
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mFb[1].data = 0;
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egl_native_window_t::fd = mapFrameBuffer();
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if (egl_native_window_t::fd >= 0) {
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const float in2mm = 25.4f;
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float refreshRate = 1000000000000000LLU / (
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float( mInfo.upper_margin + mInfo.lower_margin + mInfo.yres )
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* ( mInfo.left_margin + mInfo.right_margin + mInfo.xres )
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* mInfo.pixclock);
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const GGLSurface& buffer = mFb[1 - mIndex];
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egl_native_window_t::width = buffer.width;
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egl_native_window_t::height = buffer.height;
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egl_native_window_t::stride = buffer.stride;
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egl_native_window_t::format = buffer.format;
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egl_native_window_t::base = intptr_t(mFb[0].data);
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egl_native_window_t::offset =
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intptr_t(buffer.data) - egl_native_window_t::base;
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egl_native_window_t::flags = 0;
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egl_native_window_t::xdpi = (mInfo.xres * in2mm) / mInfo.width;
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egl_native_window_t::ydpi = (mInfo.yres * in2mm) / mInfo.height;
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egl_native_window_t::fps = refreshRate;
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egl_native_window_t::memory_type = NATIVE_MEMORY_TYPE_FB;
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// no error, set the magic word
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egl_native_window_t::magic = 0x600913;
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}
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mSwapCount = -1;
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mPageFlipCount = 0;
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}
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EGLDisplaySurface::~EGLDisplaySurface()
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{
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magic = 0;
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close(egl_native_window_t::fd);
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munmap(mFb[0].data, mSize);
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if (!(mFlags & PAGE_FLIP))
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free((void*)mFb[1].data);
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}
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void EGLDisplaySurface::hook_incRef(NativeWindowType window) {
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EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
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that->incStrong(that);
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}
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void EGLDisplaySurface::hook_decRef(NativeWindowType window) {
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EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
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that->decStrong(that);
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}
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uint32_t EGLDisplaySurface::hook_swapBuffers(NativeWindowType window) {
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EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
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return that->swapBuffers();
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}
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uint32_t EGLDisplaySurface::hook_nextBuffer(NativeWindowType window) {
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EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
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return that->nextBuffer();
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}
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void EGLDisplaySurface::hook_setSwapRectangle(NativeWindowType window,
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int l, int t, int w, int h) {
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EGLDisplaySurface* that = static_cast<EGLDisplaySurface*>(window);
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that->setSwapRectangle(l, t, w, h);
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}
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void EGLDisplaySurface::setSwapRectangle(int l, int t, int w, int h)
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{
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mInfo.reserved[0] = 0x54445055; // "UPDT";
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mInfo.reserved[1] = (uint16_t)l | ((uint32_t)t << 16);
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mInfo.reserved[2] = (uint16_t)(l+w) | ((uint32_t)(t+h) << 16);
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}
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uint32_t EGLDisplaySurface::swapBuffers()
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{
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if (!(mFlags & PAGE_FLIP))
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return 0;
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// do the actual flip
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mIndex = 1 - mIndex;
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mInfo.activate = FB_ACTIVATE_VBL;
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mInfo.yoffset = mIndex ? mInfo.yres : 0;
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if (ioctl(egl_native_window_t::fd, FBIOPUT_VSCREENINFO, &mInfo) == -1) {
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LOGE("FBIOPUT_VSCREENINFO failed");
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return 0;
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}
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/*
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* this is a monstruous hack: Because the h/w accelerator is not able
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* to render directly into the framebuffer, we need to copy its
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* internal framebuffer out to the fb. the base address of the internal fb
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* is given in oem[0].
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* All this is needed only in standalone mode, in SurfaceFlinger mode
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* we control where the GPU renders.
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*/
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if (egl_native_window_t::memory_type == NATIVE_MEMORY_TYPE_GPU && oem[0]) {
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// could use MDP here, but that's tricky because we need
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// /dev/pmem_gpu* filedescriptor
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const GGLSurface& buffer = mFb[mIndex];
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memcpy( buffer.data,
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(void*)(oem[0] + egl_native_window_t::offset),
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buffer.stride*buffer.height*2);
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}
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// update the address of the buffer to draw to next
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const GGLSurface& buffer = mFb[1 - mIndex];
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egl_native_window_t::offset =
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intptr_t(buffer.data) - egl_native_window_t::base;
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mPageFlipCount++;
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// We don't support screen-size changes for now
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return 0;
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}
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int32_t EGLDisplaySurface::getPageFlipCount() const
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{
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return mPageFlipCount;
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}
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uint32_t EGLDisplaySurface::nextBuffer()
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{
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// update the address of the buffer to draw to next
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const GGLSurface& buffer = mFb[mIndex];
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egl_native_window_t::offset =
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intptr_t(buffer.data) - egl_native_window_t::base;
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return 0;
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}
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int EGLDisplaySurface::mapFrameBuffer()
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{
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char const * const device_template[] = {
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"/dev/graphics/fb%u",
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"/dev/fb%u",
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0 };
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int fd = -1;
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int i=0;
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char name[64];
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while ((fd==-1) && device_template[i]) {
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snprintf(name, 64, device_template[i], 0);
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fd = open(name, O_RDWR, 0);
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i++;
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}
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if (fd < 0)
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return -errno;
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struct fb_fix_screeninfo finfo;
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
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return -errno;
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struct fb_var_screeninfo info;
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if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
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return -errno;
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info.reserved[0] = 0;
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info.reserved[1] = 0;
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info.reserved[2] = 0;
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info.xoffset = 0;
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info.yoffset = 0;
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info.yres_virtual = info.yres * 2;
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info.bits_per_pixel = 16;
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info.activate = FB_ACTIVATE_NOW;
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uint32_t flags = PAGE_FLIP;
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if (ioctl(fd, FBIOPUT_VSCREENINFO, &info) == -1) {
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info.yres_virtual = info.yres;
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flags &= ~PAGE_FLIP;
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LOGW("FBIOPUT_VSCREENINFO failed, page flipping not supported");
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}
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if (info.yres_virtual < info.yres * 2) {
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info.yres_virtual = info.yres;
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flags &= ~PAGE_FLIP;
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LOGW("page flipping not supported (yres_virtual=%d, requested=%d)",
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info.yres_virtual, info.yres*2);
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}
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if (ioctl(fd, FBIOGET_VSCREENINFO, &info) == -1)
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return -errno;
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int refreshRate = 1000000000000000LLU /
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(
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uint64_t( info.upper_margin + info.lower_margin + info.yres )
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* ( info.left_margin + info.right_margin + info.xres )
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* info.pixclock
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);
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if (refreshRate == 0) {
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// bleagh, bad info from the driver
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refreshRate = 60*1000; // 60 Hz
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}
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if (int(info.width) <= 0 || int(info.height) <= 0) {
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// stupid driver, doesn't return that information
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// default to Sooner's screen size (160 dpi)
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info.width = 51;
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info.height = 38;
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}
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float xdpi = (info.xres * 25.4f) / info.width;
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float ydpi = (info.yres * 25.4f) / info.height;
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float fps = refreshRate / 1000.0f;
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LOGI( "using (fd=%d)\n"
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"id = %s\n"
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"xres = %d px\n"
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"yres = %d px\n"
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"xres_virtual = %d px\n"
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"yres_virtual = %d px\n"
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"bpp = %d\n"
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"r = %2u:%u\n"
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"g = %2u:%u\n"
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"b = %2u:%u\n",
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fd,
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finfo.id,
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info.xres,
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info.yres,
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info.xres_virtual,
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info.yres_virtual,
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info.bits_per_pixel,
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info.red.offset, info.red.length,
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info.green.offset, info.green.length,
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info.blue.offset, info.blue.length
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);
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LOGI( "width = %d mm (%f dpi)\n"
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"height = %d mm (%f dpi)\n"
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"refresh rate = %.2f Hz\n",
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info.width, xdpi,
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info.height, ydpi,
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fps
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);
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if (ioctl(fd, FBIOGET_FSCREENINFO, &finfo) == -1)
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return -errno;
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if (finfo.smem_len <= 0)
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return -errno;
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/*
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* Open and map the display.
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*/
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void* buffer = (uint16_t*) mmap(
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0, finfo.smem_len,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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fd, 0);
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if (buffer == MAP_FAILED)
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return -errno;
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// at least for now, always clear the fb
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memset(buffer, 0, finfo.smem_len);
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uint8_t* offscreen[2];
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offscreen[0] = (uint8_t*)buffer;
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if (flags & PAGE_FLIP) {
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offscreen[1] = (uint8_t*)buffer + finfo.line_length*info.yres;
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} else {
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offscreen[1] = (uint8_t*)malloc(finfo.smem_len);
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if (offscreen[1] == 0) {
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munmap(buffer, finfo.smem_len);
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return -ENOMEM;
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}
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}
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mFlags = flags;
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mInfo = info;
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mFinfo = finfo;
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mSize = finfo.smem_len;
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mIndex = 0;
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for (int i=0 ; i<2 ; i++) {
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mFb[i].version = sizeof(GGLSurface);
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mFb[i].width = info.xres;
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mFb[i].height = info.yres;
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mFb[i].stride = finfo.line_length / (info.bits_per_pixel >> 3);
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mFb[i].data = (uint8_t*)(offscreen[i]);
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mFb[i].format = NATIVE_PIXEL_FORMAT_RGB_565;
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}
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return fd;
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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// ----------------------------------------------------------------------------
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