Switch minui over to C++.
Change-Id: I59e08a304ae514a3fdb6fab58721f11670bc1b01
diff --git a/minui/resources.cpp b/minui/resources.cpp
new file mode 100644
index 0000000..fa413b6
--- /dev/null
+++ b/minui/resources.cpp
@@ -0,0 +1,461 @@
+/*
+ * 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 <string.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 <png.h>
+
+#include "minui.h"
+
+extern char* locale;
+
+#define SURFACE_DATA_ALIGNMENT 8
+
+static gr_surface malloc_surface(size_t data_size) {
+ size_t size = sizeof(GRSurface) + data_size + SURFACE_DATA_ALIGNMENT;
+ unsigned char* temp = reinterpret_cast<unsigned char*>(malloc(size));
+ 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;
+ int color_type, bit_depth;
+ size_t bytesRead;
+
+ 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;
+ }
+
+ 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);
+
+ 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;
+ unsigned char* p_row;
+ unsigned int y;
+
+ *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;
+ }
+
+#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
+ png_set_bgr(png_ptr);
+#endif
+
+ p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
+ 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;
+ png_textp text;
+ int num_text;
+ unsigned char* p_row;
+ unsigned int y;
+
+ *pSurface = NULL;
+ *frames = -1;
+
+ result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
+ if (result < 0) return result;
+
+ *frames = 1;
+ 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 = reinterpret_cast<gr_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;
+ }
+ }
+
+#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
+ png_set_bgr(png_ptr);
+#endif
+
+ p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
+ 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;
+
+#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
+ png_set_bgr(png_ptr);
+#endif
+
+ 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;
+ unsigned char* row;
+ png_uint_32 y;
+
+ *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;
+ }
+
+ row = reinterpret_cast<unsigned char*>(malloc(width));
+ 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);
+}