Merge "minui: Clean up graphics_fbdev.cpp." (51219614) · Commits · e / tools / etwrp

minui/graphics_fbdev.cpp

+129 −139

Original line number	Diff line number	Diff line
		@@ -14,20 +14,15 @@
		* limitations under the License.
		*/

		#include <stdlib.h>
		#include <string.h>
		#include <unistd.h>

		#include <fcntl.h>
		#include <linux/fb.h>
		#include <stdio.h>

		#include <sys/cdefs.h>
		#include <stdlib.h>
		#include <string.h>
		#include <sys/ioctl.h>
		#include <sys/mman.h>
		#include <sys/types.h>

		#include <linux/fb.h>
		#include <linux/kd.h>
		#include <unistd.h>

		#include "minui/minui.h"
		#include "graphics.h"
		@@ -39,7 +34,7 @@ static void fbdev_exit(minui_backend*);

		static GRSurface gr_framebuffer[2];
		static bool double_buffered;
		static GRSurface* gr_draw = NULL;
		static GRSurface* gr_draw = nullptr;
		static int displayed_buffer;

		static fb_var_screeninfo vi;
		@@ -56,17 +51,14 @@ 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)
		static void fbdev_blank(minui_backend* backend __unused, bool blank) {
		int 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)
		{
		static void set_displayed_framebuffer(unsigned n) {
		if (n > 1 \|\| !double_buffered) return;

		vi.yres_virtual = gr_framebuffer[0].height * 2;
		@@ -82,20 +74,20 @@ static GRSurface* fbdev_init(minui_backend* backend) {
		int fd = open("/dev/graphics/fb0", O_RDWR);
		if (fd == -1) {
		perror("cannot open fb0");
		return NULL;
		return nullptr;
		}

		fb_fix_screeninfo fi;
		if (ioctl(fd, FBIOGET_FSCREENINFO, &fi) < 0) {
		perror("failed to get fb0 info");
		close(fd);
		return NULL;
		return nullptr;
		}

		if (ioctl(fd, FBIOGET_VSCREENINFO, &vi) < 0) {
		perror("failed to get fb0 info");
		close(fd);
		return NULL;
		return nullptr;
		}

		// We print this out for informational purposes only, but
		@@ -109,21 +101,20 @@ static GRSurface* fbdev_init(minui_backend* backend) {
		// If you have a device that actually needs another pixel format
		// (ie, BGRX, or 565), patches welcome...

		printf("fb0 reports (possibly inaccurate):\n"
		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.bits_per_pixel, vi.red.offset, vi.red.length, vi.green.offset, vi.green.length,
		vi.blue.offset, vi.blue.length);

		void* 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;
		return nullptr;
		}

		memset(bits, 0, fi.smem_len);
		@@ -140,8 +131,8 @@ static GRSurface* fbdev_init(minui_backend* backend) {
		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_framebuffer[1].data =
		gr_framebuffer[0].data + gr_framebuffer[0].height * gr_framebuffer[0].row_bytes;

		gr_draw = gr_framebuffer + 1;

		@@ -152,12 +143,12 @@ static GRSurface* fbdev_init(minui_backend* backend) {
		// 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));
		gr_draw = static_cast<GRSurface*>(malloc(sizeof(GRSurface)));
		memcpy(gr_draw, gr_framebuffer, sizeof(GRSurface));
		gr_draw->data = (unsigned char) malloc(gr_draw->height gr_draw->row_bytes);
		gr_draw->data = static_cast<unsigned char>(malloc(gr_draw->height gr_draw->row_bytes));
		if (!gr_draw->data) {
		perror("failed to allocate in-memory surface");
		return NULL;
		return nullptr;
		}
		}

		@@ -182,8 +173,7 @@ static GRSurface* fbdev_flip(minui_backend* backend __unused) {
		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);
		memcpy(gr_framebuffer[0].data, gr_draw->data, gr_draw->height * gr_draw->row_bytes);
		}
		return gr_draw;
		}
		@@ -196,5 +186,5 @@ static void fbdev_exit(minui_backend* backend __unused) {
		free(gr_draw->data);
		free(gr_draw);
		}
		gr_draw = NULL;
		gr_draw = nullptr;
		}