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