static void Repaint(struct PepperState *mystate) {
struct PP_Point topleft = PP_MakePoint(0, 0);
struct PP_Rect rect = PP_MakeRectFromXYWH(0, 0,
mystate->position.size.width,
mystate->position.size.height);
int show, render;
/* Wait for previous rendering (if applicable) to finish */
Earth_Sync();
/* Double buffer - show previously rendered image. */
show = mystate->which_image;
mystate->graphics_2d_interface->PaintImageData(mystate->device_context,
mystate->image[show],
&topleft, &rect);
int32_t ret;
ret = mystate->graphics_2d_interface->Flush(mystate->device_context,
PP_MakeCompletionCallback(&FlushCompletionCallback, mystate));
/* Start Rendering into the other image while presenting. */
render = (mystate->which_image + 1) % NUMBER_OF_IMAGES;
Earth_Draw(mystate->image_data[render],
mystate->position.size.width,
mystate->position.size.height);
/* In next callback, show what was rendered. */
mystate->which_image = render;
}
static mrb_value
scroll(mrb_state *mrb, mrb_value self)
{
mrb_value clip, amount;
struct PP_Rect pp_rect;
struct PP_Point pp_point;
mrb_get_args(mrb, "oo", &clip, &amount);
if (mrb_obj_is_instance_of(mrb, clip, mrb_pp_rect_class)) {
int32_t x = mrb_fixnum(mrb_funcall(mrb, clip, "x", 0));
int32_t y = mrb_fixnum(mrb_funcall(mrb, clip, "y", 0));
int32_t w = mrb_fixnum(mrb_funcall(mrb, clip, "width", 0));
int32_t h = mrb_fixnum(mrb_funcall(mrb, clip, "height", 0));
pp_rect = PP_MakeRectFromXYWH(x, y, w, h);
}
else {
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a PP::Rect object", clip);
}
if (mrb_obj_is_instance_of(mrb, amount, mrb_pp_point_class)) {
int32_t x = mrb_fixnum(mrb_funcall(mrb, amount, "x", 0));
int32_t y = mrb_fixnum(mrb_funcall(mrb, amount, "y", 0));
pp_point = PP_MakePoint(x, y);
}
else {
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a PP::Point object", amount);
}
PPB(Graphics2D)->Scroll(MRB_PP_RESOURCE(self), &pp_rect, &pp_point);
return mrb_nil_value();
}
static mrb_value
paint_image_data(mrb_state *mrb, mrb_value self)
{
mrb_value image, top_left, src_rect = mrb_nil_value();
PP_Resource image_data = 0;
struct PP_Point pp_point;
struct PP_Rect pp_rect;
mrb_get_args(mrb, "oo|o", &image, &top_left, &src_rect);
if (mrb_obj_is_instance_of(mrb, image, mrb_pp_image_data_class)) {
image_data = MRB_PP_RESOURCE(image);
}
else {
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a PP::Image object", image);
}
if (mrb_obj_is_instance_of(mrb, top_left, mrb_pp_point_class)) {
int32_t x = mrb_fixnum(mrb_funcall(mrb, top_left, "x", 0));
int32_t y = mrb_fixnum(mrb_funcall(mrb, top_left, "y", 0));
pp_point = PP_MakePoint(x, y);
}
else {
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a PP::Point object", top_left);
}
if (!mrb_nil_p(src_rect)) {
if (mrb_obj_is_instance_of(mrb, src_rect, mrb_pp_rect_class)) {
int32_t x = mrb_fixnum(mrb_funcall(mrb, src_rect, "x", 0));
int32_t y = mrb_fixnum(mrb_funcall(mrb, src_rect, "y", 0));
int32_t w = mrb_fixnum(mrb_funcall(mrb, src_rect, "width", 0));
int32_t h = mrb_fixnum(mrb_funcall(mrb, src_rect, "height", 0));
pp_rect = PP_MakeRectFromXYWH(x, y, w, h);
}
else {
mrb_raisef(mrb, E_TYPE_ERROR, "%S is not a PP::Rect object", src_rect);
}
}
if (mrb_nil_p(src_rect)) {
PPB(Graphics2D)->
PaintImageData(MRB_PP_RESOURCE(self), image_data, &pp_point, NULL);
}
else {
PPB(Graphics2D)->
PaintImageData(MRB_PP_RESOURCE(self), image_data, &pp_point, &pp_rect);
}
return mrb_nil_value();
}