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/*
* Copyright (C) Texas Instruments - http://www.ti.com/
*
* 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 <errno.h>
#include <stdint.h>
#include <stdbool.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <cutils/log.h>
#include <cutils/properties.h>
#include <png.h>
#include <linux/fb.h>
#include "hwc_dev.h"
#include "dock_image.h"
static struct dock_image_state {
void *buffer; /* start of fb for hdmi */
uint32_t buffer_size; /* size of fb for hdmi */
uint32_t max_width;
uint32_t max_height;
image_info_t image;
} dock_image;
static void free_png_image(image_info_t *img)
{
memset(img, 0, sizeof(*img));
}
static int load_png_image(char *path, image_info_t *img)
{
void *ptr = NULL;
png_bytepp row_pointers = NULL;
FILE *fd = fopen(path, "rb");
if (!fd) {
ALOGE("failed to open PNG file %s: (%d)", path, errno);
return -EINVAL;
}
const int SIZE_PNG_HEADER = 8;
uint8_t header[SIZE_PNG_HEADER];
fread(header, 1, SIZE_PNG_HEADER, fd);
if (png_sig_cmp(header, 0, SIZE_PNG_HEADER)) {
ALOGE("%s is not a PNG file", path);
goto fail;
}
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr)
goto fail_alloc;
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
goto fail_alloc;
if (setjmp(png_jmpbuf(png_ptr)))
goto fail_alloc;
png_init_io(png_ptr, fd);
png_set_sig_bytes(png_ptr, SIZE_PNG_HEADER);
png_set_user_limits(png_ptr, dock_image.max_width, dock_image.max_height);
png_read_info(png_ptr, info_ptr);
uint8_t bit_depth = png_get_bit_depth(png_ptr, info_ptr);
uint32_t width = png_get_image_width(png_ptr, info_ptr);
uint32_t height = png_get_image_height(png_ptr, info_ptr);
uint8_t color_type = png_get_color_type(png_ptr, info_ptr);
switch (color_type) {
case PNG_COLOR_TYPE_PALETTE:
png_set_palette_to_rgb(png_ptr);
png_set_filler(png_ptr, 128, PNG_FILLER_AFTER);
break;
case PNG_COLOR_TYPE_GRAY:
if (bit_depth < 8) {
png_set_expand_gray_1_2_4_to_8(png_ptr);
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png_ptr);
} else {
png_set_filler(png_ptr, 128, PNG_FILLER_AFTER);
}
/* fall through */
case PNG_COLOR_TYPE_GRAY_ALPHA:
png_set_gray_to_rgb(png_ptr);
break;
case PNG_COLOR_TYPE_RGB:
png_set_filler(png_ptr, 128, PNG_FILLER_AFTER);
/* fall through */
case PNG_COLOR_TYPE_RGB_ALPHA:
png_set_bgr(png_ptr);
break;
default:
ALOGE("unsupported PNG color: %x", color_type);
goto fail_alloc;
}
if (bit_depth == 16)
png_set_strip_16(png_ptr);
const uint32_t bpp = 4;
img->size = ALIGN(width * height * bpp, 4096);
if ((uint32_t)img->size > dock_image.buffer_size) {
ALOGE("image does not fit into framebuffer area (%d > %d)", img->size, dock_image.buffer_size);
goto fail_alloc;
}
img->ptr = dock_image.buffer;
row_pointers = calloc(height, sizeof(*row_pointers));
if (!row_pointers) {
ALOGE("failed to allocate row pointers");
goto fail_alloc;
}
uint32_t i;
for (i = 0; i < height; i++)
row_pointers[i] = img->ptr + i * width * bpp;
png_set_rows(png_ptr, info_ptr, row_pointers);
png_read_update_info(png_ptr, info_ptr);
img->rowbytes = png_get_rowbytes(png_ptr, info_ptr);
png_read_image(png_ptr, row_pointers);
png_read_end(png_ptr, NULL);
free(row_pointers);
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fclose(fd);
img->width = width;
img->height = height;
return 0;
fail_alloc:
free_png_image(img);
free(row_pointers);
if (!png_ptr || !info_ptr)
ALOGE("failed to allocate PNG structures");
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
fail:
fclose(fd);
return -EINVAL;
}
int init_dock_image(omap_hwc_device_t *hwc_dev, uint32_t max_width, uint32_t max_height)
{
int err = 0;
struct fb_fix_screeninfo fix;
if (ioctl(hwc_dev->fb_fd, FBIOGET_FSCREENINFO, &fix)) {
ALOGE("failed to get fb info (%d)", errno);
err = -errno;
goto done;
}
dock_image.buffer_size = fix.smem_len;
dock_image.buffer = mmap(NULL, fix.smem_len, PROT_WRITE, MAP_SHARED, hwc_dev->fb_fd, 0);
if (dock_image.buffer == MAP_FAILED) {
ALOGE("failed to map fb memory");
err = -errno;
goto done;
}
dock_image.max_width = max_width;
dock_image.max_height = max_height;
done:
return err;
}
void load_dock_image()
{
if (!dock_image.image.rowbytes) {
char value[PROPERTY_VALUE_MAX];
property_get("persist.hwc.dock_image", value, "/vendor/res/images/dock/dock.png");
load_png_image(value, &dock_image.image);
}
}
image_info_t *get_dock_image()
{
return &dock_image.image;
}
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