From 07cfb8fe799901948afd6af05ef4674173713bcb Mon Sep 17 00:00:00 2001 From: Elliott Hughes Date: Fri, 10 Apr 2015 13:12:05 -0700 Subject: Switch minui over to C++. Change-Id: I59e08a304ae514a3fdb6fab58721f11670bc1b01 --- minui/graphics_fbdev.c | 217 ------------------------------------------------- 1 file changed, 217 deletions(-) delete mode 100644 minui/graphics_fbdev.c (limited to 'minui/graphics_fbdev.c') diff --git a/minui/graphics_fbdev.c b/minui/graphics_fbdev.c deleted file mode 100644 index 4a5b5b513..000000000 --- a/minui/graphics_fbdev.c +++ /dev/null @@ -1,217 +0,0 @@ -/* - * Copyright (C) 2014 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 -#include - -#include "minui.h" -#include "graphics.h" - -static gr_surface fbdev_init(minui_backend*); -static gr_surface fbdev_flip(minui_backend*); -static void fbdev_blank(minui_backend*, bool); -static void fbdev_exit(minui_backend*); - -static GRSurface gr_framebuffer[2]; -static bool double_buffered; -static GRSurface* gr_draw = NULL; -static int displayed_buffer; - -static struct fb_var_screeninfo vi; -static int fb_fd = -1; - -static minui_backend my_backend = { - .init = fbdev_init, - .flip = fbdev_flip, - .blank = fbdev_blank, - .exit = fbdev_exit, -}; - -minui_backend* open_fbdev() { - return &my_backend; -} - -static void fbdev_blank(minui_backend* backend __unused, bool blank) -{ - int ret; - - ret = ioctl(fb_fd, FBIOBLANK, blank ? FB_BLANK_POWERDOWN : FB_BLANK_UNBLANK); - if (ret < 0) - perror("ioctl(): blank"); -} - -static void set_displayed_framebuffer(unsigned n) -{ - if (n > 1 || !double_buffered) return; - - vi.yres_virtual = gr_framebuffer[0].height * 2; - vi.yoffset = n * gr_framebuffer[0].height; - vi.bits_per_pixel = gr_framebuffer[0].pixel_bytes * 8; - if (ioctl(fb_fd, FBIOPUT_VSCREENINFO, &vi) < 0) { - perror("active fb swap failed"); - } - displayed_buffer = n; -} - -static gr_surface fbdev_init(minui_backend* backend) { - int fd; - void *bits; - - struct fb_fix_screeninfo fi; - - fd = open("/dev/graphics/fb0", O_RDWR); - if (fd < 0) { - perror("cannot open fb0"); - return NULL; - } - - if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) { - perror("failed to get fb0 info"); - close(fd); - return NULL; - } - - if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) { - perror("failed to get fb0 info"); - close(fd); - return NULL; - } - - // We print this out for informational purposes only, but - // throughout we assume that the framebuffer device uses an RGBX - // pixel format. This is the case for every development device I - // have access to. For some of those devices (eg, hammerhead aka - // Nexus 5), FBIOGET_VSCREENINFO *reports* that it wants a - // different format (XBGR) but actually produces the correct - // results on the display when you write RGBX. - // - // If you have a device that actually *needs* another pixel format - // (ie, BGRX, or 565), patches welcome... - - printf("fb0 reports (possibly inaccurate):\n" - " vi.bits_per_pixel = %d\n" - " vi.red.offset = %3d .length = %3d\n" - " vi.green.offset = %3d .length = %3d\n" - " vi.blue.offset = %3d .length = %3d\n", - vi.bits_per_pixel, - vi.red.offset, vi.red.length, - vi.green.offset, vi.green.length, - vi.blue.offset, vi.blue.length); - - bits = mmap(0, fi.smem_len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if (bits == MAP_FAILED) { - perror("failed to mmap framebuffer"); - close(fd); - return NULL; - } - - memset(bits, 0, fi.smem_len); - - gr_framebuffer[0].width = vi.xres; - gr_framebuffer[0].height = vi.yres; - gr_framebuffer[0].row_bytes = fi.line_length; - gr_framebuffer[0].pixel_bytes = vi.bits_per_pixel / 8; - gr_framebuffer[0].data = bits; - memset(gr_framebuffer[0].data, 0, gr_framebuffer[0].height * gr_framebuffer[0].row_bytes); - - /* check if we can use double buffering */ - if (vi.yres * fi.line_length * 2 <= fi.smem_len) { - double_buffered = true; - - memcpy(gr_framebuffer+1, gr_framebuffer, sizeof(GRSurface)); - gr_framebuffer[1].data = gr_framebuffer[0].data + - gr_framebuffer[0].height * gr_framebuffer[0].row_bytes; - - gr_draw = gr_framebuffer+1; - - } else { - double_buffered = false; - - // Without double-buffering, we allocate RAM for a buffer to - // draw in, and then "flipping" the buffer consists of a - // memcpy from the buffer we allocated to the framebuffer. - - gr_draw = (GRSurface*) malloc(sizeof(GRSurface)); - memcpy(gr_draw, gr_framebuffer, sizeof(GRSurface)); - gr_draw->data = (unsigned char*) malloc(gr_draw->height * gr_draw->row_bytes); - if (!gr_draw->data) { - perror("failed to allocate in-memory surface"); - return NULL; - } - } - - memset(gr_draw->data, 0, gr_draw->height * gr_draw->row_bytes); - fb_fd = fd; - set_displayed_framebuffer(0); - - printf("framebuffer: %d (%d x %d)\n", fb_fd, gr_draw->width, gr_draw->height); - - fbdev_blank(backend, true); - fbdev_blank(backend, false); - - return gr_draw; -} - -static gr_surface fbdev_flip(minui_backend* backend __unused) { - if (double_buffered) { -#if defined(RECOVERY_BGRA) - // In case of BGRA, do some byte swapping - unsigned int idx; - unsigned char tmp; - unsigned char* ucfb_vaddr = (unsigned char*)gr_draw->data; - for (idx = 0 ; idx < (gr_draw->height * gr_draw->row_bytes); - idx += 4) { - tmp = ucfb_vaddr[idx]; - ucfb_vaddr[idx ] = ucfb_vaddr[idx + 2]; - ucfb_vaddr[idx + 2] = tmp; - } -#endif - // Change gr_draw to point to the buffer currently displayed, - // then flip the driver so we're displaying the other buffer - // instead. - gr_draw = gr_framebuffer + displayed_buffer; - set_displayed_framebuffer(1-displayed_buffer); - } else { - // Copy from the in-memory surface to the framebuffer. - memcpy(gr_framebuffer[0].data, gr_draw->data, - gr_draw->height * gr_draw->row_bytes); - } - return gr_draw; -} - -static void fbdev_exit(minui_backend* backend __unused) { - close(fb_fd); - fb_fd = -1; - - if (!double_buffered && gr_draw) { - free(gr_draw->data); - free(gr_draw); - } - gr_draw = NULL; -} -- cgit v1.2.3