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first demo on emu mode :-)

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This commit is contained in:
Qingping Hou
2012-03-03 13:26:12 +08:00
parent c4d0cd26ae
commit 581684d3bd
2 changed files with 21 additions and 20 deletions
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39
djvu.c
View File

@@ -28,7 +28,7 @@ typedef struct DjvuDocument {
typedef struct DjvuPage {
int num;
ddjvu_page_t *page;
ddjvu_page_t *page_ref;
ddjvu_pageinfo_t info;
DjvuDocument *doc;
} DjvuPage;
@@ -119,7 +119,6 @@ static int newDrawContext(lua_State *L) {
int offset_x = luaL_optint(L, 3, 0);
int offset_y = luaL_optint(L, 4, 0);
double gamma = luaL_optnumber(L, 5, (double) -1.0);
unsigned int format_mask[4];
DrawContext *dc = (DrawContext*) lua_newuserdata(L, sizeof(DrawContext));
dc->rotate = rotate;
@@ -128,11 +127,8 @@ static int newDrawContext(lua_State *L) {
/*dc->offset_y = offset_y;*/
dc->gamma = gamma;
format_mask[0] = 0x00ff0000;
format_mask[1] = 0x0000ff00;
format_mask[2] = 0x000000ff;
format_mask[3] = 0xff000000;
dc->pixelformat = ddjvu_format_create(DDJVU_FORMAT_RGBMASK32, 4, format_mask);
/*dc->pixelformat = ddjvu_format_create(DDJVU_FORMAT_RGBMASK32, 4, format_mask);*/
dc->pixelformat = ddjvu_format_create(DDJVU_FORMAT_GREY8, 0, NULL);
ddjvu_format_set_row_order(dc->pixelformat, 1);
ddjvu_format_set_y_direction(dc->pixelformat, 1);
/*ddjvu_format_set_ditherbits(dc->pixelformat, 2);*/
@@ -205,14 +201,15 @@ static int openPage(lua_State *L) {
luaL_getmetatable(L, "djvupage");
lua_setmetatable(L, -2);
page->page = ddjvu_page_create_by_pageno(doc->doc_ref, pageno - 1);
while (! ddjvu_page_decoding_done(page->page))
page->page_ref = ddjvu_page_create_by_pageno(doc->doc_ref, pageno - 1);
while (! ddjvu_page_decoding_done(page->page_ref))
handle(L, doc->context, TRUE);
if(! page->page) {
if(! page->page_ref) {
return luaL_error(L, "cannot open page #%d", pageno);
}
page->doc = doc;
page->num = pageno;
/* @TODO:handle failure here */
ddjvu_document_get_pageinfo(doc->doc_ref, pageno, &(page->info));
@@ -238,8 +235,8 @@ static int getPageSize(lua_State *L) {
/*lua_pushnumber(L, page->info.width);*/
/*lua_pushnumber(L, page->info.height);*/
lua_pushnumber(L, ddjvu_page_get_width(page));
lua_pushnumber(L, ddjvu_page_get_height(page));
lua_pushnumber(L, ddjvu_page_get_width(page->page_ref) * dc->zoom);
lua_pushnumber(L, ddjvu_page_get_height(page->page_ref) * dc->zoom);
return 2;
}
@@ -288,8 +285,8 @@ static int drawPage(lua_State *L) {
/*fz_matrix ctm;*/
/*fz_bbox bbox;*/
ddjvu_rect_t pagerect, renderrect;
char imagebuffer[600*800*4+1];
memset(imagebuffer, 0, 600*800*4+1);
char imagebuffer[600*800+1];
memset(imagebuffer, 0, 600*800+1);
DjvuPage *page = (DjvuPage*) luaL_checkudata(L, 1, "djvupage");
@@ -321,12 +318,12 @@ static int drawPage(lua_State *L) {
/*dev = fz_new_draw_device(page->doc->context, pix);*/
printf("%d, %d\n", bb->w, bb->h);
ddjvu_page_render(page->page,
DDJVU_FORMAT_RGBMASK32,
ddjvu_page_render(page->page_ref,
DDJVU_RENDER_COLOR,
&pagerect,
&renderrect,
dc->pixelformat,
(bb->w)*4,
bb->w,
imagebuffer);
/*if(dc->gamma >= 0.0) {*/
@@ -334,16 +331,18 @@ static int drawPage(lua_State *L) {
/*}*/
uint8_t *bbptr = (uint8_t*)bb->data;
uint16_t *pmptr = (uint16_t*)imagebuffer;
uint8_t *pmptr = (uint8_t*)imagebuffer;
int x, y;
for(y = 0; y < bb->h; y++) {
/* render every line */
for(x = 0; x < (bb->w / 2); x++) {
bbptr[x] = (((pmptr[x*2 + 1] & 0xF0) >> 4) | (pmptr[x*2] & 0xF0)) ^ 0xFF;
bbptr[x] = 255 - (((pmptr[x*2 + 1] & 0xF0) >> 4) | (pmptr[x*2] & 0xF0));
}
if(bb->w & 1) {
bbptr[x] = pmptr[x*2] & 0xF0;
bbptr[x] = 255 - (pmptr[x*2] & 0xF0);
}
/* go to next line */
bbptr += bb->pitch;
pmptr += bb->w;
}

2
djvureader.lua
View File

@@ -100,7 +100,9 @@ function DJVUReader:draworcache(no, zoom, offset_x, offset_y, width, height, gam
-- and draw the page
local page = self.doc:openPage(no)
local dc = self:setzoom(page, hash)
--print("--drawing page : "..no)
page:draw(dc, self.cache[hash].bb, 0, 0)
--print("--page draught: "..no)
page:close()
else
-- we have the page in our cache,