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/* $Id$ */
/** @file texteff.cpp Handling of text effects. */
#include "stdafx.h"
#include "openttd.h"
#include "strings_type.h"
#include "texteff.hpp"
#include "core/bitmath_func.hpp"
#include "transparency.h"
#include "strings_func.h"
#include "core/alloc_func.hpp"
#include "functions.h"
#include "viewport_func.h"
#include "settings_type.h"
enum {
INIT_NUM_TEXT_EFFECTS = 20,
};
struct TextEffect {
StringID string_id;
int32 x;
int32 y;
int32 right;
int32 bottom;
uint16 duration;
uint64 params_1;
uint64 params_2;
TextEffectMode mode;
};
/* used for text effects */
static TextEffect *_text_effect_list = NULL;
static uint16 _num_text_effects = INIT_NUM_TEXT_EFFECTS;
/* Text Effects */
/**
* Mark the area of the text effect as dirty.
*
* This function marks the area of a text effect as dirty for repaint.
*
* @param te The TextEffect to mark the area dirty
* @ingroup dirty
*/
static void MarkTextEffectAreaDirty(TextEffect *te)
{
/* Width and height of the text effect are doubled, so they are correct in both zoom out levels 1x and 2x. */
MarkAllViewportsDirty(
te->x,
te->y - 1,
(te->right - te->x)*2 + te->x + 1,
(te->bottom - (te->y - 1)) * 2 + (te->y - 1) + 1
);
}
TextEffectID AddTextEffect(StringID msg, int x, int y, uint16 duration, TextEffectMode mode)
{
TextEffect *te;
int w;
char buffer[100];
TextEffectID i;
if (_game_mode == GM_MENU) return INVALID_TE_ID;
/* Look for a free spot in the text effect array */
for (i = 0; i < _num_text_effects; i++) {
if (_text_effect_list[i].string_id == INVALID_STRING_ID) break;
}
/* If there is none found, we grow the array */
if (i == _num_text_effects) {
_num_text_effects += 25;
_text_effect_list = ReallocT<TextEffect>(_text_effect_list, _num_text_effects);
for (; i < _num_text_effects; i++) _text_effect_list[i].string_id = INVALID_STRING_ID;
i = _num_text_effects - 1;
}
te = &_text_effect_list[i];
/* Start defining this object */
te->string_id = msg;
te->duration = duration;
te->y = y - 5;
te->bottom = y + 5;
te->params_1 = GetDParam(0);
te->params_2 = GetDParam(4);
te->mode = mode;
GetString(buffer, msg, lastof(buffer));
w = GetStringBoundingBox(buffer).width;
te->x = x - (w >> 1);
te->right = x + (w >> 1) - 1;
MarkTextEffectAreaDirty(te);
return i;
}
void UpdateTextEffect(TextEffectID te_id, StringID msg)
{
assert(te_id < _num_text_effects);
TextEffect *te;
/* Update details */
te = &_text_effect_list[te_id];
te->string_id = msg;
te->params_1 = GetDParam(0);
te->params_2 = GetDParam(4);
/* Update width of text effect */
char buffer[100];
GetString(buffer, msg, lastof(buffer));
int w = GetStringBoundingBox(buffer).width;
/* Only allow to make it broader, so it completely covers the old text. That avoids remnants of the old text. */
int right_new = te->x + w;
if (te->right < right_new) te->right = right_new;
MarkTextEffectAreaDirty(te);
}
void RemoveTextEffect(TextEffectID te_id)
{
assert(te_id < _num_text_effects);
TextEffect *te;
te = &_text_effect_list[te_id];
MarkTextEffectAreaDirty(te);
te->string_id = INVALID_STRING_ID;
}
static void MoveTextEffect(TextEffect *te)
{
/* Never expire for duration of 0xFFFF */
if (te->duration == 0xFFFF) return;
if (te->duration < 8) {
te->string_id = INVALID_STRING_ID;
} else {
te->duration -= 8;
te->y--;
te->bottom--;
}
MarkTextEffectAreaDirty(te);
}
void MoveAllTextEffects()
{
for (TextEffectID i = 0; i < _num_text_effects; i++) {
TextEffect *te = &_text_effect_list[i];
if (te->string_id != INVALID_STRING_ID && te->mode == TE_RISING) MoveTextEffect(te);
}
}
void InitTextEffects()
{
if (_text_effect_list == NULL) _text_effect_list = MallocT<TextEffect>(_num_text_effects);
for (TextEffectID i = 0; i < _num_text_effects; i++) _text_effect_list[i].string_id = INVALID_STRING_ID;
}
void DrawTextEffects(DrawPixelInfo *dpi)
{
switch (dpi->zoom) {
case ZOOM_LVL_NORMAL:
for (TextEffectID i = 0; i < _num_text_effects; i++) {
TextEffect *te = &_text_effect_list[i];
if (te->string_id != INVALID_STRING_ID &&
dpi->left <= te->right &&
dpi->top <= te->bottom &&
dpi->left + dpi->width > te->x &&
dpi->top + dpi->height > te->y) {
if (te->mode == TE_RISING || (_settings_client.gui.loading_indicators && !IsTransparencySet(TO_LOADING))) {
AddStringToDraw(te->x, te->y, te->string_id, te->params_1, te->params_2);
}
}
}
break;
case ZOOM_LVL_OUT_2X:
for (TextEffectID i = 0; i < _num_text_effects; i++) {
TextEffect *te = &_text_effect_list[i];
if (te->string_id != INVALID_STRING_ID &&
dpi->left <= te->right * 2 - te->x &&
dpi->top <= te->bottom * 2 - te->y &&
dpi->left + dpi->width > te->x &&
dpi->top + dpi->height > te->y) {
if (te->mode == TE_RISING || (_settings_client.gui.loading_indicators && !IsTransparencySet(TO_LOADING))) {
AddStringToDraw(te->x, te->y, (StringID)(te->string_id - 1), te->params_1, te->params_2);
}
}
}
break;
case ZOOM_LVL_OUT_4X:
case ZOOM_LVL_OUT_8X:
break;
default: NOT_REACHED();
}
}
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