diff options
Diffstat (limited to 'minui21/resources.c')
| -rw-r--r-- | minui21/resources.c | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/minui21/resources.c b/minui21/resources.c new file mode 100644 index 000000000..ed25e45a2 --- /dev/null +++ b/minui21/resources.c @@ -0,0 +1,479 @@ +/* + * 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" + +#ifdef FASTMMI_FEATURE +char *locale = NULL; +#else +extern char* locale; +#endif + +// 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; +} + +#define SURFACE_DATA_ALIGNMENT 8 + +static GGLSurface* malloc_surface(size_t data_size) { + unsigned char* temp = malloc(sizeof(GGLSurface) + data_size + SURFACE_DATA_ALIGNMENT); + if (temp == NULL) return NULL; + GGLSurface* surface = (GGLSurface*) temp; + surface->data = temp + sizeof(GGLSurface) + + (SURFACE_DATA_ALIGNMENT - (sizeof(GGLSurface) % 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 GGLSurface* init_display_surface(png_uint_32 width, png_uint_32 height) { + GGLSurface* surface; + + surface = (GGLSurface*) malloc_surface(width * height * 4); + if (surface == NULL) return NULL; + + surface->version = sizeof(GGLSurface); + surface->width = width; + surface->height = height; + surface->stride = width; + + 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_surface(const char* name, gr_surface* pSurface) { + GGLSurface* 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 * width * 4, channels, width); + } + free(p_row); + + if (channels == 3) + surface->format = GGL_PIXEL_FORMAT_RGBX_8888; + else + surface->format = GGL_PIXEL_FORMAT_RGBA_8888; + + *pSurface = (gr_surface) 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(GGLSurface)); + 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; + GGLSurface* p = (GGLSurface*) surface[frame]; + unsigned char* out_row = p->data + + (y / *frames) * width * 4; + transform_rgb_to_draw(p_row, out_row, channels, width); + } + free(p_row); + + for (i = 0; i < *frames; ++i) { + GGLSurface* p = (GGLSurface*) surface[i]; + if (channels == 3) + p->format = GGL_PIXEL_FORMAT_RGBX_8888; + else + p->format = GGL_PIXEL_FORMAT_RGBA_8888; + } + + *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; +} + +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); + + int color_type, bit_depth; + size_t width, height; + + png_get_IHDR(png_ptr, info_ptr, width, height, &bit_depth, + &color_type, NULL, NULL, NULL); + + png_byte* channels = png_get_channels(png_ptr, info_ptr); + size_t stride = 4 * width; + + 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); + } +} |