C++ (Cpp) rwpng_write_endの例

コード例 #1

ファイル: rwpng.c プロジェクト: Troland/improved-pngquant

pngquant_error rwpng_write_image8(FILE *outfile, png8_image *mainprog_ptr)
{
    png_structp png_ptr;
    png_infop info_ptr;

    pngquant_error retval = rwpng_write_image_init((png_image*)mainprog_ptr, &png_ptr, &info_ptr, outfile);
    if (retval) return retval;

    /* set the image parameters appropriately */
    int sample_depth;
    if (mainprog_ptr->num_palette <= 2)
        sample_depth = 1;
    else if (mainprog_ptr->num_palette <= 4)
        sample_depth = 2;
    else if (mainprog_ptr->num_palette <= 16)
        sample_depth = 4;
    else
        sample_depth = 8;

    png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height,
      sample_depth, PNG_COLOR_TYPE_PALETTE,
      0, PNG_COMPRESSION_TYPE_DEFAULT,
      PNG_FILTER_TYPE_BASE);

    png_set_PLTE(png_ptr, info_ptr, &mainprog_ptr->palette[0], mainprog_ptr->num_palette);

    if (mainprog_ptr->num_trans > 0)
        png_set_tRNS(png_ptr, info_ptr, mainprog_ptr->trans, mainprog_ptr->num_trans, NULL);

    rwpng_write_end(&info_ptr, &png_ptr, (png_image*)mainprog_ptr);

    return SUCCESS;
}

コード例 #2

ファイル: rwpng.c プロジェクト: Troland/improved-pngquant

pngquant_error rwpng_write_image24(FILE *outfile, png24_image *mainprog_ptr)
{
    png_structp png_ptr;
    png_infop info_ptr;

    pngquant_error retval = rwpng_write_image_init((png_image*)mainprog_ptr, &png_ptr, &info_ptr, outfile);
    if (retval) return retval;

    png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height,
                 8, PNG_COLOR_TYPE_RGB_ALPHA,
                 0, PNG_COMPRESSION_TYPE_DEFAULT,
                 PNG_FILTER_TYPE_BASE);


    rwpng_write_end(&info_ptr, &png_ptr, (png_image*)mainprog_ptr);

    return SUCCESS;
}

コード例 #3

ファイル: rwpng.c プロジェクト: andreydobrikov/improved-pngquant

pngquant_error rwpng_write_image8(FILE *outfile, png8_image *mainprog_ptr)
{
    png_structp png_ptr;
    png_infop info_ptr;

    pngquant_error retval = rwpng_write_image_init((png_image*)mainprog_ptr, &png_ptr, &info_ptr, outfile);
    if (retval) return retval;

    // Palette images generally don't gain anything from filtering
    png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, PNG_FILTER_VALUE_NONE);

    rwpng_set_gamma(info_ptr, png_ptr, mainprog_ptr->gamma);

    /* set the image parameters appropriately */
    int sample_depth;
    if (mainprog_ptr->num_palette <= 2)
        sample_depth = 1;
    else if (mainprog_ptr->num_palette <= 4)
        sample_depth = 2;
    else if (mainprog_ptr->num_palette <= 16)
        sample_depth = 4;
    else
        sample_depth = 8;

    png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height,
      sample_depth, PNG_COLOR_TYPE_PALETTE,
      0, PNG_COMPRESSION_TYPE_DEFAULT,
      PNG_FILTER_TYPE_BASE);

    png_set_PLTE(png_ptr, info_ptr, &mainprog_ptr->palette[0], mainprog_ptr->num_palette);

    if (mainprog_ptr->num_trans > 0)
        png_set_tRNS(png_ptr, info_ptr, mainprog_ptr->trans, mainprog_ptr->num_trans, NULL);


    png_bytepp row_pointers = rwpng_create_row_pointers(info_ptr, png_ptr, mainprog_ptr->indexed_data, mainprog_ptr->height, mainprog_ptr->width);

    rwpng_write_end(&info_ptr, &png_ptr, row_pointers);

    free(row_pointers);

    return SUCCESS;
}

コード例 #4

ファイル: rwpng.c プロジェクト: andreydobrikov/improved-pngquant

pngquant_error rwpng_write_image24(FILE *outfile, png24_image *mainprog_ptr)
{
    png_structp png_ptr;
    png_infop info_ptr;

    pngquant_error retval = rwpng_write_image_init((png_image*)mainprog_ptr, &png_ptr, &info_ptr, outfile);
    if (retval) return retval;

    rwpng_set_gamma(info_ptr, png_ptr, mainprog_ptr->gamma);

    png_set_IHDR(png_ptr, info_ptr, mainprog_ptr->width, mainprog_ptr->height,
                 8, PNG_COLOR_TYPE_RGB_ALPHA,
                 0, PNG_COMPRESSION_TYPE_DEFAULT,
                 PNG_FILTER_TYPE_BASE);


    png_bytepp row_pointers = rwpng_create_row_pointers(info_ptr, png_ptr, mainprog_ptr->rgba_data, mainprog_ptr->height, 0);

    rwpng_write_end(&info_ptr, &png_ptr, row_pointers);

    free(row_pointers);

    return SUCCESS;
}