/*
|
* Copyright (C) 2007 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 <stdlib.h>
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
#include <stdio.h>
|
|
#include <sys/ioctl.h>
|
#include <sys/mman.h>
|
#include <sys/types.h>
|
#include <string.h>
|
|
#include <linux/fb.h>
|
#include <linux/kd.h>
|
|
#include <png.h>
|
|
#include "minui.h"
|
|
extern char* locale;
|
|
#define SURFACE_DATA_ALIGNMENT 8
|
|
static gr_surface malloc_surface(size_t data_size) {
|
unsigned char* temp = malloc(sizeof(GRSurface) + data_size + SURFACE_DATA_ALIGNMENT);
|
if (temp == NULL) return NULL;
|
gr_surface surface = (gr_surface) temp;
|
surface->data = temp + sizeof(GRSurface) +
|
(SURFACE_DATA_ALIGNMENT - (sizeof(GRSurface) % SURFACE_DATA_ALIGNMENT));
|
return surface;
|
}
|
|
static int open_png(const char* name, png_structp* png_ptr, png_infop* info_ptr,
|
png_uint_32* width, png_uint_32* height, png_byte* channels) {
|
char resPath[256];
|
unsigned char header[8];
|
int result = 0;
|
|
snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name);
|
resPath[sizeof(resPath)-1] = '\0';
|
FILE* fp = fopen(resPath, "rb");
|
if (fp == NULL) {
|
result = -1;
|
goto exit;
|
}
|
|
size_t bytesRead = fread(header, 1, sizeof(header), fp);
|
if (bytesRead != sizeof(header)) {
|
result = -2;
|
goto exit;
|
}
|
|
if (png_sig_cmp(header, 0, sizeof(header))) {
|
result = -3;
|
goto exit;
|
}
|
|
*png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
|
if (!*png_ptr) {
|
result = -4;
|
goto exit;
|
}
|
|
*info_ptr = png_create_info_struct(*png_ptr);
|
if (!*info_ptr) {
|
result = -5;
|
goto exit;
|
}
|
|
if (setjmp(png_jmpbuf(*png_ptr))) {
|
result = -6;
|
goto exit;
|
}
|
|
png_init_io(*png_ptr, fp);
|
png_set_sig_bytes(*png_ptr, sizeof(header));
|
png_read_info(*png_ptr, *info_ptr);
|
|
int color_type, bit_depth;
|
png_get_IHDR(*png_ptr, *info_ptr, width, height, &bit_depth,
|
&color_type, NULL, NULL, NULL);
|
|
*channels = png_get_channels(*png_ptr, *info_ptr);
|
|
if (bit_depth == 8 && *channels == 3 && color_type == PNG_COLOR_TYPE_RGB) {
|
// 8-bit RGB images: great, nothing to do.
|
} else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_GRAY) {
|
// 1-, 2-, 4-, or 8-bit gray images: expand to 8-bit gray.
|
png_set_expand_gray_1_2_4_to_8(*png_ptr);
|
} else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_PALETTE) {
|
// paletted images: expand to 8-bit RGB. Note that we DON'T
|
// currently expand the tRNS chunk (if any) to an alpha
|
// channel, because minui doesn't support alpha channels in
|
// general.
|
png_set_palette_to_rgb(*png_ptr);
|
*channels = 3;
|
} else {
|
fprintf(stderr, "minui doesn't support PNG depth %d channels %d color_type %d\n",
|
bit_depth, *channels, color_type);
|
result = -7;
|
goto exit;
|
}
|
|
return result;
|
|
exit:
|
if (result < 0) {
|
png_destroy_read_struct(png_ptr, info_ptr, NULL);
|
}
|
if (fp != NULL) {
|
fclose(fp);
|
}
|
|
return result;
|
}
|
|
// "display" surfaces are transformed into the framebuffer's required
|
// pixel format (currently only RGBX is supported) at load time, so
|
// gr_blit() can be nothing more than a memcpy() for each row. The
|
// next two functions are the only ones that know anything about the
|
// framebuffer pixel format; they need to be modified if the
|
// framebuffer format changes (but nothing else should).
|
|
// Allocate and return a gr_surface sufficient for storing an image of
|
// the indicated size in the framebuffer pixel format.
|
static gr_surface init_display_surface(png_uint_32 width, png_uint_32 height) {
|
gr_surface surface;
|
|
surface = malloc_surface(width * height * 4);
|
if (surface == NULL) return NULL;
|
|
surface->width = width;
|
surface->height = height;
|
surface->row_bytes = width * 4;
|
surface->pixel_bytes = 4;
|
|
return surface;
|
}
|
|
// Copy 'input_row' to 'output_row', transforming it to the
|
// framebuffer pixel format. The input format depends on the value of
|
// 'channels':
|
//
|
// 1 - input is 8-bit grayscale
|
// 3 - input is 24-bit RGB
|
// 4 - input is 32-bit RGBA/RGBX
|
//
|
// 'width' is the number of pixels in the row.
|
static void transform_rgb_to_draw(unsigned char* input_row,
|
unsigned char* output_row,
|
int channels, int width) {
|
int x;
|
unsigned char* ip = input_row;
|
unsigned char* op = output_row;
|
|
switch (channels) {
|
case 1:
|
// expand gray level to RGBX
|
for (x = 0; x < width; ++x) {
|
*op++ = *ip;
|
*op++ = *ip;
|
*op++ = *ip;
|
*op++ = 0xff;
|
ip++;
|
}
|
break;
|
|
case 3:
|
// expand RGBA to RGBX
|
for (x = 0; x < width; ++x) {
|
*op++ = *ip++;
|
*op++ = *ip++;
|
*op++ = *ip++;
|
*op++ = 0xff;
|
}
|
break;
|
|
case 4:
|
// copy RGBA to RGBX
|
memcpy(output_row, input_row, width*4);
|
break;
|
}
|
}
|
|
int res_create_display_surface(const char* name, gr_surface* pSurface) {
|
gr_surface surface = NULL;
|
int result = 0;
|
png_structp png_ptr = NULL;
|
png_infop info_ptr = NULL;
|
png_uint_32 width, height;
|
png_byte channels;
|
|
*pSurface = NULL;
|
|
result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
|
if (result < 0) return result;
|
|
surface = init_display_surface(width, height);
|
if (surface == NULL) {
|
result = -8;
|
goto exit;
|
}
|
|
unsigned char* p_row = malloc(width * 4);
|
unsigned int y;
|
for (y = 0; y < height; ++y) {
|
png_read_row(png_ptr, p_row, NULL);
|
transform_rgb_to_draw(p_row, surface->data + y * surface->row_bytes, channels, width);
|
}
|
free(p_row);
|
|
*pSurface = surface;
|
|
exit:
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
if (result < 0 && surface != NULL) free(surface);
|
return result;
|
}
|
|
int res_create_multi_display_surface(const char* name, int* frames, gr_surface** pSurface) {
|
gr_surface* surface = NULL;
|
int result = 0;
|
png_structp png_ptr = NULL;
|
png_infop info_ptr = NULL;
|
png_uint_32 width, height;
|
png_byte channels;
|
int i;
|
|
*pSurface = NULL;
|
*frames = -1;
|
|
result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
|
if (result < 0) return result;
|
|
*frames = 1;
|
png_textp text;
|
int num_text;
|
if (png_get_text(png_ptr, info_ptr, &text, &num_text)) {
|
for (i = 0; i < num_text; ++i) {
|
if (text[i].key && strcmp(text[i].key, "Frames") == 0 && text[i].text) {
|
*frames = atoi(text[i].text);
|
break;
|
}
|
}
|
printf(" found frames = %d\n", *frames);
|
}
|
|
if (height % *frames != 0) {
|
printf("bad height (%d) for frame count (%d)\n", height, *frames);
|
result = -9;
|
goto exit;
|
}
|
|
surface = malloc(*frames * sizeof(gr_surface));
|
if (surface == NULL) {
|
result = -8;
|
goto exit;
|
}
|
for (i = 0; i < *frames; ++i) {
|
surface[i] = init_display_surface(width, height / *frames);
|
if (surface[i] == NULL) {
|
result = -8;
|
goto exit;
|
}
|
}
|
|
unsigned char* p_row = malloc(width * 4);
|
unsigned int y;
|
for (y = 0; y < height; ++y) {
|
png_read_row(png_ptr, p_row, NULL);
|
int frame = y % *frames;
|
unsigned char* out_row = surface[frame]->data +
|
(y / *frames) * surface[frame]->row_bytes;
|
transform_rgb_to_draw(p_row, out_row, channels, width);
|
}
|
free(p_row);
|
|
*pSurface = (gr_surface*) surface;
|
|
exit:
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
|
if (result < 0) {
|
if (surface) {
|
for (i = 0; i < *frames; ++i) {
|
if (surface[i]) free(surface[i]);
|
}
|
free(surface);
|
}
|
}
|
return result;
|
}
|
|
int res_create_alpha_surface(const char* name, gr_surface* pSurface) {
|
gr_surface surface = NULL;
|
int result = 0;
|
png_structp png_ptr = NULL;
|
png_infop info_ptr = NULL;
|
png_uint_32 width, height;
|
png_byte channels;
|
|
*pSurface = NULL;
|
|
result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
|
if (result < 0) return result;
|
|
if (channels != 1) {
|
result = -7;
|
goto exit;
|
}
|
|
surface = malloc_surface(width * height);
|
if (surface == NULL) {
|
result = -8;
|
goto exit;
|
}
|
surface->width = width;
|
surface->height = height;
|
surface->row_bytes = width;
|
surface->pixel_bytes = 1;
|
|
unsigned char* p_row;
|
unsigned int y;
|
for (y = 0; y < height; ++y) {
|
p_row = surface->data + y * surface->row_bytes;
|
png_read_row(png_ptr, p_row, NULL);
|
}
|
|
*pSurface = surface;
|
|
exit:
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
if (result < 0 && surface != NULL) free(surface);
|
return result;
|
}
|
|
static int matches_locale(const char* loc, const char* locale) {
|
if (locale == NULL) return 0;
|
|
if (strcmp(loc, locale) == 0) return 1;
|
|
// if loc does *not* have an underscore, and it matches the start
|
// of locale, and the next character in locale *is* an underscore,
|
// that's a match. For instance, loc == "en" matches locale ==
|
// "en_US".
|
|
int i;
|
for (i = 0; loc[i] != 0 && loc[i] != '_'; ++i);
|
if (loc[i] == '_') return 0;
|
|
return (strncmp(locale, loc, i) == 0 && locale[i] == '_');
|
}
|
|
int res_create_localized_alpha_surface(const char* name,
|
const char* locale,
|
gr_surface* pSurface) {
|
gr_surface surface = NULL;
|
int result = 0;
|
png_structp png_ptr = NULL;
|
png_infop info_ptr = NULL;
|
png_uint_32 width, height;
|
png_byte channels;
|
|
*pSurface = NULL;
|
|
if (locale == NULL) {
|
surface = malloc_surface(0);
|
surface->width = 0;
|
surface->height = 0;
|
surface->row_bytes = 0;
|
surface->pixel_bytes = 1;
|
goto exit;
|
}
|
|
result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
|
if (result < 0) return result;
|
|
if (channels != 1) {
|
result = -7;
|
goto exit;
|
}
|
|
unsigned char* row = malloc(width);
|
png_uint_32 y;
|
for (y = 0; y < height; ++y) {
|
png_read_row(png_ptr, row, NULL);
|
int w = (row[1] << 8) | row[0];
|
int h = (row[3] << 8) | row[2];
|
int len = row[4];
|
char* loc = (char*)row+5;
|
|
if (y+1+h >= height || matches_locale(loc, locale)) {
|
printf(" %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y);
|
|
surface = malloc_surface(w*h);
|
if (surface == NULL) {
|
result = -8;
|
goto exit;
|
}
|
surface->width = w;
|
surface->height = h;
|
surface->row_bytes = w;
|
surface->pixel_bytes = 1;
|
|
int i;
|
for (i = 0; i < h; ++i, ++y) {
|
png_read_row(png_ptr, row, NULL);
|
memcpy(surface->data + i*w, row, w);
|
}
|
|
*pSurface = (gr_surface) surface;
|
break;
|
} else {
|
int i;
|
for (i = 0; i < h; ++i, ++y) {
|
png_read_row(png_ptr, row, NULL);
|
}
|
}
|
}
|
|
exit:
|
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
|
if (result < 0 && surface != NULL) free(surface);
|
return result;
|
}
|
|
void res_free_surface(gr_surface surface) {
|
free(surface);
|
}
|
