lib/readers/image.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <memory.h>
   4 #include "../gfxdevice.h"
   5 #include "../gfxsource.h"
   6 #include "../gfxtools.h"
   7 #include "../log.h"
   8 #include "../mem.h"
   9 #include "../jpeg.h"
  10 #include "../png.h"
  11 #include "image.h"
  12
  13 typedef struct _image_page_internal
  14 {
  15 } image_page_internal_t;
  16
  17 typedef struct _image_doc_internal
  18 {
  19     gfximage_t img;
  20 } image_doc_internal_t;
  21
  22 void imagepage_destroy(gfxpage_t*image_page)
  23 {
  24     image_page_internal_t*i= (image_page_internal_t*)image_page->internal;
  25     free(image_page->internal);image_page->internal = 0;
  26     free(image_page);image_page=0;
  27 }
  28
  29 void imagepage_render(gfxpage_t*page, gfxdevice_t*output)
  30 {
  31     image_page_internal_t*i = (image_page_internal_t*)page->internal;
  32     image_doc_internal_t*pi = (image_doc_internal_t*)page->parent->internal;
  33
  34     gfxcxform_t cxform;
  35     memset(&cxform, 0, sizeof(cxform));
  36     cxform.rr = 1;
  37     cxform.gg = 1;
  38     cxform.bb = 1;
  39     cxform.aa = 1;
  40
  41     gfxmatrix_t m;
  42     memset(&m, 0, sizeof(m));
  43     m.m00 = 1;
  44     m.m11 = 1;
  45
  46     gfxline_t* rect = gfxline_makerectangle(0, 0, pi->img.width, pi->img.height);
  47     output->fillbitmap(output, rect, &pi->img, &m, &cxform);
  48     gfxline_free(rect);
  49 }
  50
  51 void imagepage_rendersection(gfxpage_t*page, gfxdevice_t*output, gfxcoord_t x, gfxcoord_t y, gfxcoord_t _x1, gfxcoord_t _y1, gfxcoord_t _x2, gfxcoord_t _y2)
  52 {
  53     image_page_internal_t*i = (image_page_internal_t*)page->internal;
  54     image_doc_internal_t*pi = (image_doc_internal_t*)page->parent->internal;
  55
  56     gfxcxform_t cxform;
  57     memset(&cxform, 0, sizeof(cxform));
  58     cxform.rr = 1;
  59     cxform.gg = 1;
  60     cxform.bb = 1;
  61     cxform.aa = 1;
  62
  63     gfxmatrix_t m;
  64     memset(&m, 0, sizeof(m));
  65     m.m00 = 1;
  66     m.m11 = 1;
  67     m.tx = x;
  68     m.ty = y;
  69
  70     gfxline_t* rect = gfxline_makerectangle(0, 0, pi->img.width, pi->img.height);
  71     gfxline_t* rect2 = gfxline_makerectangle(_x1, _y1, _x2, _y2);
  72
  73     output->startclip(output, rect2);
  74     output->fillbitmap(output, rect, &pi->img, &m, &cxform);
  75     output->endclip(output);
  76     gfxline_free(rect);
  77     gfxline_free(rect2);
  78 }
  79
  80 void image_doc_destroy(gfxdocument_t*gfx)
  81 {
  82     image_doc_internal_t*i= (image_doc_internal_t*)gfx->internal;
  83     // ...
  84     free(gfx->internal);gfx->internal=0;
  85     free(gfx);gfx=0;
  86 }
  87
  88 void image_doc_set_parameter(gfxdocument_t*gfx, const char*name, const char*value)
  89 {
  90     image_doc_internal_t*i= (image_doc_internal_t*)gfx->internal;
  91 }
  92
  93 gfxpage_t* image_doc_getpage(gfxdocument_t*doc, int page)
  94 {
  95     image_doc_internal_t*di= (image_doc_internal_t*)doc->internal;
  96     if(page != 1)
  97         return 0;
  98
  99     gfxpage_t* image_page = (gfxpage_t*)malloc(sizeof(gfxpage_t));
 100     image_page_internal_t*pi= (image_page_internal_t*)malloc(sizeof(image_page_internal_t));
 101     memset(pi, 0, sizeof(image_page_internal_t));
 102
 103     image_page->internal = pi;
 104     image_page->destroy = imagepage_destroy;
 105     image_page->render = imagepage_render;
 106     image_page->rendersection = imagepage_rendersection;
 107     image_page->width = di->img.width;
 108     image_page->height = di->img.height;
 109     image_page->parent = doc;
 110     image_page->nr = page;
 111     return image_page;
 112 }
 113
 114 static void image_set_parameter(gfxsource_t*src, const char*name, const char*value)
 115 {
 116     msg("<verbose> (gfxsource_image) setting parameter %s to \"%s\"", name, value);
 117 }
 118
 119 static gfxdocument_t*image_open(gfxsource_t*src, const char*filename)
 120 {
 121     gfxdocument_t*image_doc = (gfxdocument_t*)malloc(sizeof(gfxdocument_t));
 122     memset(image_doc, 0, sizeof(gfxdocument_t));
 123     image_doc_internal_t*i= (image_doc_internal_t*)malloc(sizeof(image_doc_internal_t));
 124     memset(i, 0, sizeof(image_doc_internal_t));
 125
 126     gfxcolor_t*data = 0;
 127     int width = 0;
 128     int height = 0;
 129
 130     if(!getPNG(filename, &width, &height, (unsigned char**)&data)) {
 131         if(!jpeg_load(filename, (unsigned char**)&data, &width, &height)) {
 132             msg("<error> Couldn't load image %s", filename);
 133             return 0;
 134         }
 135     }
 136     i->img.data = data;
 137     i->img.width = width;
 138     i->img.height = height;
 139
 140     image_doc->num_pages = 1;
 141     image_doc->internal = i;
 142     image_doc->get = 0;
 143     image_doc->destroy = image_doc_destroy;
 144     image_doc->set_parameter = image_doc_set_parameter;
 145     image_doc->getpage = image_doc_getpage;
 146
 147     return image_doc;
 148 }
 149
 150 gfxsource_t*gfxsource_image_create()
 151 {
 152     gfxsource_t*src = (gfxsource_t*)malloc(sizeof(gfxsource_t));
 153     memset(src, 0, sizeof(gfxsource_t));
 154     src->set_parameter = image_set_parameter;
 155     src->open = image_open;
 156     return src;
 157 }