QImage Model::DjVuPage::render(qreal horizontalResolution, qreal verticalResolution, Rotation rotation, const QRect& boundingRect) const { QMutexLocker mutexLocker(&m_parent->m_mutex); ddjvu_status_t status; ddjvu_page_t* page = ddjvu_page_create_by_pageno(m_parent->m_document, m_index); if(page == 0) { return QImage(); } while(true) { status = ddjvu_page_decoding_status(page); if(status < DDJVU_JOB_OK) { clearMessageQueue(m_parent->m_context, true); } else { break; } } if(status >= DDJVU_JOB_FAILED) { ddjvu_page_release(page); return QImage(); } switch(rotation) { default: case RotateBy0: ddjvu_page_set_rotation(page, DDJVU_ROTATE_0); break; case RotateBy90: ddjvu_page_set_rotation(page, DDJVU_ROTATE_270); break; case RotateBy180: ddjvu_page_set_rotation(page, DDJVU_ROTATE_180); break; case RotateBy270: ddjvu_page_set_rotation(page, DDJVU_ROTATE_90); break; } ddjvu_rect_t pagerect; pagerect.x = 0; pagerect.y = 0; switch(rotation) { default: case RotateBy0: case RotateBy180: pagerect.w = qRound(horizontalResolution / m_resolution * m_size.width()); pagerect.h = qRound(verticalResolution / m_resolution * m_size.height()); break; case RotateBy90: case RotateBy270: pagerect.w = qRound(horizontalResolution / m_resolution * m_size.height()); pagerect.h = qRound(verticalResolution / m_resolution * m_size.width()); break; } ddjvu_rect_t renderrect; if(boundingRect.isNull()) { renderrect.x = pagerect.x; renderrect.y = pagerect.y; renderrect.w = pagerect.w; renderrect.h = pagerect.h; } else { renderrect.x = boundingRect.x(); renderrect.y = boundingRect.y(); renderrect.w = boundingRect.width(); renderrect.h = boundingRect.height(); } QImage image(renderrect.w, renderrect.h, QImage::Format_RGB32); if(!ddjvu_page_render(page, DDJVU_RENDER_COLOR, &pagerect, &renderrect, m_parent->m_format, image.bytesPerLine(), reinterpret_cast< char* >(image.bits()))) { image = QImage(); } clearMessageQueue(m_parent->m_context, false); ddjvu_page_release(page); return image; }
zathura_image_buffer_t* djvu_page_render(zathura_page_t* page, void* UNUSED(data), zathura_error_t* error) { if (page == NULL) { if (error != NULL) { *error = ZATHURA_ERROR_INVALID_ARGUMENTS; } return NULL; } zathura_document_t* document = zathura_page_get_document(page); if (document == NULL) { return NULL; } /* calculate sizes */ unsigned int page_width = zathura_document_get_scale(document) * zathura_page_get_width(page); unsigned int page_height = zathura_document_get_scale(document) * zathura_page_get_height(page); if (page_width == 0 || page_height == 0) { if (error != NULL) { *error = ZATHURA_ERROR_UNKNOWN; } goto error_out; } /* init ddjvu render data */ djvu_document_t* djvu_document = zathura_document_get_data(document); ddjvu_page_t* djvu_page = ddjvu_page_create_by_pageno( djvu_document->document, zathura_page_get_index(page)); if (djvu_page == NULL) { if (error != NULL) { *error = ZATHURA_ERROR_UNKNOWN; } goto error_out; } while (!ddjvu_page_decoding_done(djvu_page)) { handle_messages(djvu_document, true); } ddjvu_rect_t rrect = { 0, 0, page_width, page_height }; ddjvu_rect_t prect = { 0, 0, page_width, page_height }; zathura_image_buffer_t* image_buffer = zathura_image_buffer_create(page_width, page_height); if (image_buffer == NULL) { if (error != NULL) { *error = ZATHURA_ERROR_OUT_OF_MEMORY; } goto error_free; } /* set rotation */ ddjvu_page_set_rotation(djvu_page, DDJVU_ROTATE_0); /* render page */ ddjvu_page_render(djvu_page, DDJVU_RENDER_COLOR, &prect, &rrect, djvu_document->format, 3 * page_width, (char*) image_buffer->data); return image_buffer; error_free: ddjvu_page_release(djvu_page); zathura_image_buffer_free(image_buffer); error_out: return NULL; }