minui/resources.c - platform/bootable/recovery - Git at Google

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

 #include <pixelflinger/pixelflinger.h>

 #include <png.h>

 #include "minui.h"

 extern char* locale;

 // libpng gives "undefined reference to 'pow'" errors, and I have no
 // idea how to convince the build system to link with -lm.  We don't
 // need this functionality (it's used for gamma adjustment) so provide
 // a dummy implementation to satisfy the linker.
 double pow(double x, double y) {
     return x * y;
 }

 int res_create_surface(const char* name, gr_surface* pSurface) {
     char resPath[256];
     GGLSurface* surface = NULL;
     int result = 0;
     unsigned char header[8];
     png_structp png_ptr = NULL;
     png_infop info_ptr = NULL;

     *pSurface = NULL;

     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 = info_ptr->color_type;
     int bit_depth = info_ptr->bit_depth;
     int channels = info_ptr->channels;
     if (!(bit_depth == 8 &&
           ((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) ||
            (channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) ||
            (channels == 1 && (color_type == PNG_COLOR_TYPE_PALETTE ||
                               color_type == PNG_COLOR_TYPE_GRAY))))) {
         return -7;
         goto exit;
     }

     size_t width = info_ptr->width;
     size_t height = info_ptr->height;
     size_t stride = (color_type == PNG_COLOR_TYPE_GRAY ? 1 : 4) * width;
     size_t pixelSize = stride * height;

     surface = malloc(sizeof(GGLSurface) + pixelSize);
     if (surface == NULL) {
         result = -8;
         goto exit;
     }
     unsigned char* pData = (unsigned char*) (surface + 1);
     surface->version = sizeof(GGLSurface);
     surface->width = width;
     surface->height = height;
     surface->stride = width; /* Yes, pixels, not bytes */
     surface->data = pData;
     surface->format = (channels == 3) ? GGL_PIXEL_FORMAT_RGBX_8888 :
         ((color_type == PNG_COLOR_TYPE_PALETTE ? GGL_PIXEL_FORMAT_RGBA_8888 : GGL_PIXEL_FORMAT_L_8));

     int alpha = 0;
     if (color_type == PNG_COLOR_TYPE_PALETTE) {
         png_set_palette_to_rgb(png_ptr);
     }
     if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
         png_set_tRNS_to_alpha(png_ptr);
         alpha = 1;
     }
     if (color_type == PNG_COLOR_TYPE_GRAY) {
         alpha = 1;
     }

     unsigned int y;
     if (channels == 3 || (channels == 1 && !alpha)) {
         for (y = 0; y < height; ++y) {
             unsigned char* pRow = pData + y * stride;
             png_read_row(png_ptr, pRow, NULL);

             int x;
             for(x = width - 1; x >= 0; x--) {
                 int sx = x * 3;
                 int dx = x * 4;
                 unsigned char r = pRow[sx];
                 unsigned char g = pRow[sx + 1];
                 unsigned char b = pRow[sx + 2];
                 unsigned char a = 0xff;
                 pRow[dx    ] = r; // r
                 pRow[dx + 1] = g; // g
                 pRow[dx + 2] = b; // b
                 pRow[dx + 3] = a;
             }
         }
     } else {
         for (y = 0; y < height; ++y) {
             unsigned char* pRow = pData + y * stride;
             png_read_row(png_ptr, pRow, NULL);
         }
     }

     *pSurface = (gr_surface) surface;

 exit:
     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);

     if (fp != NULL) {
         fclose(fp);
     }
     if (result < 0) {
         if (surface) {
             free(surface);
         }
     }
     return result;
 }

 static int matches_locale(const char* loc) {
     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_surface(const char* name, gr_surface* pSurface) {
     char resPath[256];
     GGLSurface* surface = NULL;
     int result = 0;
     unsigned char header[8];
     png_structp png_ptr = NULL;
     png_infop info_ptr = NULL;

     *pSurface = NULL;

     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);

     size_t width = info_ptr->width;
     size_t height = info_ptr->height;
     size_t stride = 4 * width;

     int color_type = info_ptr->color_type;
     int bit_depth = info_ptr->bit_depth;
     int channels = info_ptr->channels;

     if (!(bit_depth == 8 &&
           (channels == 1 && color_type == PNG_COLOR_TYPE_GRAY))) {
         return -7;
         goto exit;
     }

     unsigned char* row = malloc(width);
     int 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 = row+5;

         if (y+1+h >= height || matches_locale(loc)) {
             printf("  %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y);

             surface = malloc(sizeof(GGLSurface));
             if (surface == NULL) {
                 result = -8;
                 goto exit;
             }
             unsigned char* pData = malloc(w*h);

             surface->version = sizeof(GGLSurface);
             surface->width = w;
             surface->height = h;
             surface->stride = w; /* Yes, pixels, not bytes */
             surface->data = pData;
             surface->format = GGL_PIXEL_FORMAT_A_8;

             int i;
             for (i = 0; i < h; ++i, ++y) {
                 png_read_row(png_ptr, row, NULL);
                 memcpy(pData + 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 (fp != NULL) {
         fclose(fp);
     }
     if (result < 0) {
         if (surface) {
             free(surface);
         }
     }
     return result;
 }

 void res_free_surface(gr_surface surface) {
     GGLSurface* pSurface = (GGLSurface*) surface;
     if (pSurface) {
         free(pSurface);
     }
 }
	/*
	* 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 <linux/fb.h>
	#include <linux/kd.h>

	#include <pixelflinger/pixelflinger.h>

	#include <png.h>

	#include "minui.h"

	extern char* locale;

	// libpng gives "undefined reference to 'pow'" errors, and I have no
	// idea how to convince the build system to link with -lm. We don't
	// need this functionality (it's used for gamma adjustment) so provide
	// a dummy implementation to satisfy the linker.
	double pow(double x, double y) {
	return x * y;
	}

	int res_create_surface(const char* name, gr_surface* pSurface) {
	char resPath[256];
	GGLSurface* surface = NULL;
	int result = 0;
	unsigned char header[8];
	png_structp png_ptr = NULL;
	png_infop info_ptr = NULL;

	*pSurface = NULL;

	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 = info_ptr->color_type;
	int bit_depth = info_ptr->bit_depth;
	int channels = info_ptr->channels;
	if (!(bit_depth == 8 &&
	((channels == 3 && color_type == PNG_COLOR_TYPE_RGB) \|\|
	(channels == 4 && color_type == PNG_COLOR_TYPE_RGBA) \|\|
	(channels == 1 && (color_type == PNG_COLOR_TYPE_PALETTE \|\|
	color_type == PNG_COLOR_TYPE_GRAY))))) {
	return -7;
	goto exit;
	}

	size_t width = info_ptr->width;
	size_t height = info_ptr->height;
	size_t stride = (color_type == PNG_COLOR_TYPE_GRAY ? 1 : 4) * width;
	size_t pixelSize = stride * height;

	surface = malloc(sizeof(GGLSurface) + pixelSize);
	if (surface == NULL) {
	result = -8;
	goto exit;
	}
	unsigned char* pData = (unsigned char*) (surface + 1);
	surface->version = sizeof(GGLSurface);
	surface->width = width;
	surface->height = height;
	surface->stride = width; /* Yes, pixels, not bytes */
	surface->data = pData;
	surface->format = (channels == 3) ? GGL_PIXEL_FORMAT_RGBX_8888 :
	((color_type == PNG_COLOR_TYPE_PALETTE ? GGL_PIXEL_FORMAT_RGBA_8888 : GGL_PIXEL_FORMAT_L_8));

	int alpha = 0;
	if (color_type == PNG_COLOR_TYPE_PALETTE) {
	png_set_palette_to_rgb(png_ptr);
	}
	if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
	png_set_tRNS_to_alpha(png_ptr);
	alpha = 1;
	}
	if (color_type == PNG_COLOR_TYPE_GRAY) {
	alpha = 1;
	}

	unsigned int y;
	if (channels == 3 \|\| (channels == 1 && !alpha)) {
	for (y = 0; y < height; ++y) {
	unsigned char* pRow = pData + y * stride;
	png_read_row(png_ptr, pRow, NULL);

	int x;
	for(x = width - 1; x >= 0; x--) {
	int sx = x * 3;
	int dx = x * 4;
	unsigned char r = pRow[sx];
	unsigned char g = pRow[sx + 1];
	unsigned char b = pRow[sx + 2];
	unsigned char a = 0xff;
	pRow[dx ] = r; // r
	pRow[dx + 1] = g; // g
	pRow[dx + 2] = b; // b
	pRow[dx + 3] = a;
	}
	}
	} else {
	for (y = 0; y < height; ++y) {
	unsigned char* pRow = pData + y * stride;
	png_read_row(png_ptr, pRow, NULL);
	}
	}

	*pSurface = (gr_surface) surface;

	exit:
	png_destroy_read_struct(&png_ptr, &info_ptr, NULL);

	if (fp != NULL) {
	fclose(fp);
	}
	if (result < 0) {
	if (surface) {
	free(surface);
	}
	}
	return result;
	}

	static int matches_locale(const char* loc) {
	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_surface(const char* name, gr_surface* pSurface) {
	char resPath[256];
	GGLSurface* surface = NULL;
	int result = 0;
	unsigned char header[8];
	png_structp png_ptr = NULL;
	png_infop info_ptr = NULL;

	*pSurface = NULL;

	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);

	size_t width = info_ptr->width;
	size_t height = info_ptr->height;
	size_t stride = 4 * width;

	int color_type = info_ptr->color_type;
	int bit_depth = info_ptr->bit_depth;
	int channels = info_ptr->channels;

	if (!(bit_depth == 8 &&
	(channels == 1 && color_type == PNG_COLOR_TYPE_GRAY))) {
	return -7;
	goto exit;
	}

	unsigned char* row = malloc(width);
	int 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 = row+5;

	if (y+1+h >= height \|\| matches_locale(loc)) {
	printf(" %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y);

	surface = malloc(sizeof(GGLSurface));
	if (surface == NULL) {
	result = -8;
	goto exit;
	}
	unsigned char* pData = malloc(w*h);

	surface->version = sizeof(GGLSurface);
	surface->width = w;
	surface->height = h;
	surface->stride = w; /* Yes, pixels, not bytes */
	surface->data = pData;
	surface->format = GGL_PIXEL_FORMAT_A_8;

	int i;
	for (i = 0; i < h; ++i, ++y) {
	png_read_row(png_ptr, row, NULL);
	memcpy(pData + 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 (fp != NULL) {
	fclose(fp);
	}
	if (result < 0) {
	if (surface) {
	free(surface);
	}
	}
	return result;
	}

	void res_free_surface(gr_surface surface) {
	GGLSurface* pSurface = (GGLSurface*) surface;
	if (pSurface) {
	free(pSurface);
	}
	}