diff options
Diffstat (limited to 'shared')
| -rw-r--r-- | shared/Makefile.am | 4 | ||||
| -rw-r--r-- | shared/config-parser.h | 5 | ||||
| -rw-r--r-- | shared/image-loader.c | 379 |
3 files changed, 388 insertions, 0 deletions
diff --git a/shared/Makefile.am b/shared/Makefile.am index 0b8ec1b..d77060c 100644 --- a/shared/Makefile.am +++ b/shared/Makefile.am @@ -1,5 +1,9 @@ +libconfig_parser_la_LIBADD = $(IMAGE_LIBS) +AM_CPPFLAGS = $(IMAGE_CFLAGS) + noinst_LTLIBRARIES = libconfig-parser.la libconfig_parser_la_SOURCES = \ config-parser.c \ option-parser.c \ + image-loader.c \ config-parser.h diff --git a/shared/config-parser.h b/shared/config-parser.h index 0619bb4..6403947 100644 --- a/shared/config-parser.h +++ b/shared/config-parser.h @@ -23,6 +23,8 @@ #ifndef CONFIGPARSER_H #define CONFIGPARSER_H +#include <pixman.h> + enum config_key_type { CONFIG_KEY_INTEGER, /* typeof data = int */ CONFIG_KEY_UNSIGNED_INTEGER, /* typeof data = unsigned int */ @@ -69,5 +71,8 @@ int parse_options(const struct weston_option *options, int count, int argc, char *argv[]); +pixman_image_t * +load_image(const char *filename); + #endif /* CONFIGPARSER_H */ diff --git a/shared/image-loader.c b/shared/image-loader.c new file mode 100644 index 0000000..98cc431 --- /dev/null +++ b/shared/image-loader.c @@ -0,0 +1,379 @@ +/* + * Copyright © 2008-2012 Kristian Høgsberg + * Copyright © 2012 Intel Corporation + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include "../config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <jpeglib.h> +#include <png.h> +#include <pixman.h> + +#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0]) + +#ifdef HAVE_WEBP +#include <webp/decode.h> +#endif + +static int +stride_for_width(int width) +{ + return width * 4; +} + +static void +swizzle_row(JSAMPLE *row, JDIMENSION width) +{ + JSAMPLE *s; + uint32_t *d; + + s = row + (width - 1) * 3; + d = (uint32_t *) (row + (width - 1) * 4); + while (s >= row) { + *d = 0xff000000 | (s[0] << 16) | (s[1] << 8) | (s[2] << 0); + s -= 3; + d--; + } +} + +static void +error_exit(j_common_ptr cinfo) +{ + longjmp(cinfo->client_data, 1); +} + +static pixman_image_t * +load_jpeg(FILE *fp) +{ + struct jpeg_decompress_struct cinfo; + struct jpeg_error_mgr jerr; + int stride, i, first; + JSAMPLE *data, *rows[4]; + jmp_buf env; + + cinfo.err = jpeg_std_error(&jerr); + jerr.error_exit = error_exit; + cinfo.client_data = env; + if (setjmp(env)) + return NULL; + + jpeg_create_decompress(&cinfo); + + jpeg_stdio_src(&cinfo, fp); + + jpeg_read_header(&cinfo, TRUE); + + cinfo.out_color_space = JCS_RGB; + jpeg_start_decompress(&cinfo); + + stride = cinfo.output_width * 4; + data = malloc(stride * cinfo.output_height); + if (data == NULL) { + fprintf(stderr, "couldn't allocate image data\n"); + return NULL; + } + + while (cinfo.output_scanline < cinfo.output_height) { + first = cinfo.output_scanline; + for (i = 0; i < ARRAY_LENGTH(rows); i++) + rows[i] = data + (first + i) * stride; + + jpeg_read_scanlines(&cinfo, rows, ARRAY_LENGTH(rows)); + for (i = 0; first + i < cinfo.output_scanline; i++) + swizzle_row(rows[i], cinfo.output_width); + } + + jpeg_finish_decompress(&cinfo); + + jpeg_destroy_decompress(&cinfo); + + return pixman_image_create_bits(PIXMAN_a8r8g8b8, + cinfo.output_width, + cinfo.output_height, + (uint32_t *) data, stride); +} + +static inline int +multiply_alpha(int alpha, int color) +{ + int temp = (alpha * color) + 0x80; + + return ((temp + (temp >> 8)) >> 8); +} + +static void +premultiply_data(png_structp png, + png_row_infop row_info, + png_bytep data) +{ + unsigned int i; + png_bytep p; + + for (i = 0, p = data; i < row_info->rowbytes; i += 4, p += 4) { + png_byte alpha = p[3]; + uint32_t w; + + if (alpha == 0) { + w = 0; + } else { + png_byte red = p[0]; + png_byte green = p[1]; + png_byte blue = p[2]; + + if (alpha != 0xff) { + red = multiply_alpha(alpha, red); + green = multiply_alpha(alpha, green); + blue = multiply_alpha(alpha, blue); + } + w = (alpha << 24) | (red << 16) | (green << 8) | (blue << 0); + } + + * (uint32_t *) p = w; + } +} + +static void +read_func(png_structp png, png_bytep data, png_size_t size) +{ + FILE *fp = png_get_io_ptr(png); + + if (fread(data, 1, size, fp) < 0) + png_error(png, NULL); +} + +static void +png_error_callback(png_structp png, png_const_charp error_msg) +{ + longjmp (png_jmpbuf (png), 1); +} + +static pixman_image_t * +load_png(FILE *fp) +{ + png_struct *png; + png_info *info; + png_byte *data = NULL; + png_byte **row_pointers = NULL; + png_uint_32 width, height; + int depth, color_type, interlace, stride; + unsigned int i; + + png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, + png_error_callback, NULL); + if (!png) + return NULL; + + info = png_create_info_struct(png); + if (!info) { + png_destroy_read_struct(&png, &info, NULL); + return NULL; + } + + if (setjmp(png_jmpbuf(png))) { + if (data) + free(data); + if (row_pointers) + free(row_pointers); + png_destroy_read_struct(&png, &info, NULL); + return NULL; + } + + png_set_read_fn(png, fp, read_func); + png_read_info(png, info); + png_get_IHDR(png, info, + &width, &height, &depth, + &color_type, &interlace, NULL, NULL); + + if (color_type == PNG_COLOR_TYPE_PALETTE) + png_set_palette_to_rgb(png); + + if (color_type == PNG_COLOR_TYPE_GRAY) + png_set_expand_gray_1_2_4_to_8(png); + + if (png_get_valid(png, info, PNG_INFO_tRNS)) + png_set_tRNS_to_alpha(png); + + if (depth == 16) + png_set_strip_16(png); + + if (depth < 8) + png_set_packing(png); + + if (color_type == PNG_COLOR_TYPE_GRAY || + color_type == PNG_COLOR_TYPE_GRAY_ALPHA) + png_set_gray_to_rgb(png); + + if (interlace != PNG_INTERLACE_NONE) + png_set_interlace_handling(png); + + png_set_filler(png, 0xff, PNG_FILLER_AFTER); + png_set_read_user_transform_fn(png, premultiply_data); + png_read_update_info(png, info); + png_get_IHDR(png, info, + &width, &height, &depth, + &color_type, &interlace, NULL, NULL); + + + stride = stride_for_width(width); + data = malloc(stride * height); + if (!data) { + png_destroy_read_struct(&png, &info, NULL); + return NULL; + } + + row_pointers = malloc(height * sizeof row_pointers[0]); + if (row_pointers == NULL) { + free(data); + png_destroy_read_struct(&png, &info, NULL); + return NULL; + } + + for (i = 0; i < height; i++) + row_pointers[i] = &data[i * stride]; + + png_read_image(png, row_pointers); + png_read_end(png, info); + + free(row_pointers); + png_destroy_read_struct(&png, &info, NULL); + + return pixman_image_create_bits(PIXMAN_a8r8g8b8, width, height, + (uint32_t *) data, stride); +} + +#ifdef HAVE_WEBP + +static pixman_image_t * +load_webp(FILE *fp) +{ + WebPDecoderConfig config; + uint8_t buffer[16 * 1024]; + int len; + VP8StatusCode status; + WebPIDecoder *idec; + + if (!WebPInitDecoderConfig(&config)) { + fprintf(stderr, "Library version mismatch!\n"); + return NULL; + } + + /* webp decoding api doesn't seem to specify a min size that's + usable for GetFeatures, but 256 works... */ + len = fread(buffer, 1, 256, fp); + status = WebPGetFeatures(buffer, len, &config.input); + if (status != VP8_STATUS_OK) { + fprintf(stderr, "failed to parse webp header\n"); + WebPFreeDecBuffer(&config.output); + return NULL; + } + + config.output.colorspace = MODE_BGRA; + config.output.u.RGBA.stride = stride_for_width(config.input.width); + config.output.u.RGBA.size = + config.output.u.RGBA.stride * config.input.height; + config.output.u.RGBA.rgba = + malloc(config.output.u.RGBA.stride * config.input.height); + config.output.is_external_memory = 1; + if (!config.output.u.RGBA.rgba) { + WebPFreeDecBuffer(&config.output); + return NULL; + } + + rewind(fp); + idec = WebPINewDecoder(&config.output); + if (!idec) { + WebPFreeDecBuffer(&config.output); + return NULL; + } + + while (!feof(fp)) { + len = fread(buffer, 1, sizeof buffer, fp); + status = WebPIAppend(idec, buffer, len); + if (status != VP8_STATUS_OK) { + fprintf(stderr, "webp decode status %d\n", status); + WebPIDelete(idec); + WebPFreeDecBuffer(&config.output); + return NULL; + } + } + + WebPIDelete(idec); + WebPFreeDecBuffer(&config.output); + + return pixman_image_create_bits(PIXMAN_a8r8g8b8, + config.input.width, + config.input.height, + (uint32_t *) config.output.u.RGBA.rgba, + config.output.u.RGBA.stride); +} + +#endif + + +struct image_loader { + char header[4]; + int header_size; + pixman_image_t *(*load)(FILE *fp); +}; + +static const struct image_loader loaders[] = { + { { 0x89, 'P', 'N', 'G' }, 4, load_png }, + { { 0xff, 0xd8 }, 2, load_jpeg }, +#ifdef HAVE_WEBP + { { 'R', 'I', 'F', 'F' }, 4, load_webp } +#endif +}; + +pixman_image_t * +load_image(const char *filename) +{ + pixman_image_t *image; + unsigned char header[4]; + FILE *fp; + int i; + + fp = fopen(filename, "rb"); + if (fp == NULL) + return NULL; + + fread(header, sizeof header, 1, fp); + rewind(fp); + for (i = 0; i < ARRAY_LENGTH(loaders); i++) { + if (memcmp(header, loaders[i].header, + loaders[i].header_size) == 0) { + image = loaders[i].load(fp); + break; + } + } + + fclose(fp); + + if (i == ARRAY_LENGTH(loaders)) { + fprintf(stderr, "unrecognized file header for %s: " + "0x%02x 0x%02x 0x%02x 0x%02x\n", + filename, header[0], header[1], header[2], header[3]); + image = NULL; + } + + return image; +} |