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/* See LICENSE file for license and copyright information */
#include <math.h>
#include <girara/datastructures.h>
#include <girara/utils.h>
#include <girara/session.h>
#include <girara/settings.h>
#include "render.h"
#include "zathura.h"
#include "document.h"
#include "page-widget.h"
#include "utils.h"
static void render_job(void* data, void* user_data);
static bool render(zathura_t* zathura, zathura_page_t* page);
struct render_thread_s
{
GThreadPool* pool; /**< Pool of threads */
GStaticMutex mutex; /**< Render lock */
};
static void
render_job(void* data, void* user_data)
{
zathura_page_t* page = data;
zathura_t* zathura = user_data;
if (page == NULL || zathura == NULL) {
return;
}
if (render(zathura, page) != true) {
girara_error("Rendering failed (page %d)\n", page->number);
}
}
render_thread_t*
render_init(zathura_t* zathura)
{
render_thread_t* render_thread = g_malloc0(sizeof(render_thread_t));
/* setup */
render_thread->pool = g_thread_pool_new(render_job, zathura, 1, TRUE, NULL);
if (render_thread->pool == NULL) {
goto error_free;
}
g_static_mutex_init(&render_thread->mutex);
return render_thread;
error_free:
render_free(render_thread);
return NULL;
}
void
render_free(render_thread_t* render_thread)
{
if (render_thread == NULL) {
return;
}
if (render_thread->pool) {
g_thread_pool_free(render_thread->pool, TRUE, TRUE);
}
g_static_mutex_free(&render_thread->mutex);
g_free(render_thread);
}
bool
render_page(render_thread_t* render_thread, zathura_page_t* page)
{
if (render_thread == NULL || page == NULL || render_thread->pool == NULL) {
return false;
}
g_thread_pool_push(render_thread->pool, page, NULL);
return true;
}
static bool
render(zathura_t* zathura, zathura_page_t* page)
{
if (zathura == NULL || page == NULL) {
return false;
}
/* create cairo surface */
unsigned int page_width = 0;
unsigned int page_height = 0;
page_calc_height_width(page, &page_height, &page_width, false);
cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, page_width, page_height);
if (surface == NULL) {
return false;
}
cairo_t* cairo = cairo_create(surface);
if (cairo == NULL) {
cairo_surface_destroy(surface);
return false;
}
cairo_save(cairo);
cairo_set_source_rgb(cairo, 1, 1, 1);
cairo_rectangle(cairo, 0, 0, page_width, page_height);
cairo_fill(cairo);
cairo_restore(cairo);
cairo_save(cairo);
if (fabs(zathura->document->scale - 1.0f) > FLT_EPSILON) {
cairo_scale(cairo, zathura->document->scale, zathura->document->scale);
}
render_lock(zathura->sync.render_thread);
if (zathura_page_render(page, cairo, false) != ZATHURA_PLUGIN_ERROR_OK) {
render_unlock(zathura->sync.render_thread);
cairo_destroy(cairo);
cairo_surface_destroy(surface);
return false;
}
render_unlock(zathura->sync.render_thread);
cairo_restore(cairo);
cairo_destroy(cairo);
const int rowstride = cairo_image_surface_get_stride(surface);
unsigned char* image = cairo_image_surface_get_data(surface);
/* recolor */
if (zathura->global.recolor == true) {
/* recolor code based on qimageblitz library flatten() function
(http://sourceforge.net/projects/qimageblitz/) */
int r1 = zathura->ui.colors.recolor_dark_color.red / 257;
int g1 = zathura->ui.colors.recolor_dark_color.green / 257;
int b1 = zathura->ui.colors.recolor_dark_color.blue / 257;
int r2 = zathura->ui.colors.recolor_light_color.red / 257;
int g2 = zathura->ui.colors.recolor_light_color.green / 257;
int b2 = zathura->ui.colors.recolor_light_color.blue / 257;
int min = 0x00;
int max = 0xFF;
int mean = 0x00;
float sr = ((float) r2 - r1) / (max - min);
float sg = ((float) g2 - g1) / (max - min);
float sb = ((float) b2 - b1) / (max - min);
for (unsigned int y = 0; y < page_height; y++) {
unsigned char* data = image + y * rowstride;
for (unsigned int x = 0; x < page_width; x++) {
mean = (data[0] + data[1] + data[2]) / 3;
data[2] = sr * (mean - min) + r1 + 0.5;
data[1] = sg * (mean - min) + g1 + 0.5;
data[0] = sb * (mean - min) + b1 + 0.5;
data += 4;
}
}
}
/* update the widget */
gdk_threads_enter();
zathura_page_widget_update_surface(ZATHURA_PAGE(page->drawing_area), surface);
gdk_threads_leave();
return true;
}
void
render_all(zathura_t* zathura)
{
if (zathura->document == NULL) {
return;
}
/* unmark all pages */
for (unsigned int page_id = 0; page_id < zathura->document->number_of_pages; page_id++) {
zathura_page_t* page = zathura->document->pages[page_id];
unsigned int page_height = 0, page_width = 0;
page_calc_height_width(page, &page_height, &page_width, true);
gtk_widget_set_size_request(page->drawing_area, page_width, page_height);
gtk_widget_queue_resize(page->drawing_area);
}
}
void
render_lock(render_thread_t* render_thread)
{
if (render_thread == NULL) {
return;
}
g_static_mutex_lock(&render_thread->mutex);
}
void
render_unlock(render_thread_t* render_thread)
{
if (render_thread == NULL) {
return;
}
g_static_mutex_unlock(&render_thread->mutex);
}
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