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libgui/source/gui/GuiText.cpp
Thomas Rohloff fea73ae1d3 Introduce Supersampling Anti-Aliasing 
This changes GuiText::internatRenderingScale to int32_t as it doesn't make much sense to have floating point SSAA values. Also you might want to check if the entered value is valid instead of lazy setting it

Signed-off-by: Thomas Rohloff <v10lator@myway.de>
2020-05-15 11:34:02 +02:00

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/****************************************************************************
* Copyright (C) 2015 Dimok
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
****************************************************************************/
#include <gui/GuiText.h>
#include <gui/FreeTypeGX.h>
#include <gui/video/CVideo.h>
FreeTypeGX * GuiText::presentFont = NULL;
int32_t GuiText::presetSize = 28;
int32_t GuiText::presetInternalRenderingScale = 1;
int32_t GuiText::presetMaxWidth = 0xFFFF;
int32_t GuiText::presetAlignment = ALIGN_CENTER | ALIGN_MIDDLE;
GX2ColorF32 GuiText::presetColor = (GX2ColorF32) {
1.0f, 1.0f, 1.0f, 1.0f
};
#define TEXT_SCROLL_DELAY 6
#define TEXT_SCROLL_INITIAL_DELAY 10
#define MAX_LINES_TO_DRAW 10
/**
* Constructor for the GuiText class.
*/
GuiText::GuiText() {
text = NULL;
size = presetSize;
currentSize = size;
color = glm::vec4(presetColor.r, presetColor.g, presetColor.b, presetColor.a);
alpha = presetColor.a;
alignment = presetAlignment;
maxWidth = presetMaxWidth;
wrapMode = 0;
textWidth = 0;
font = presentFont;
linestodraw = MAX_LINES_TO_DRAW;
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
textScrollDelay = TEXT_SCROLL_DELAY;
defaultBlur = 4.0f;
blurGlowIntensity = 0.0f;
blurAlpha = 0.0f;
blurGlowColor = glm::vec4(0.0f);
internalRenderingScale = presetInternalRenderingScale;
}
GuiText::GuiText(const char * t, int32_t s, const glm::vec4 & c, int32_t SSAA) {
text = NULL;
size = s;
currentSize = size;
color = c;
alpha = c[3];
alignment = ALIGN_CENTER | ALIGN_MIDDLE;
maxWidth = presetMaxWidth;
wrapMode = 0;
textWidth = 0;
font = presentFont;
linestodraw = MAX_LINES_TO_DRAW;
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
textScrollDelay = TEXT_SCROLL_DELAY;
defaultBlur = 4.0f;
blurGlowIntensity = 0.0f;
blurAlpha = 0.0f;
blurGlowColor = glm::vec4(0.0f);
internalRenderingScale = SSAA;
if(t) {
text = FreeTypeGX::charToWideChar(t);
if(!text)
return;
textWidth = font->getWidth(text, currentSize);
}
}
GuiText::GuiText(const wchar_t * t, int32_t s, const glm::vec4 & c, int32_t SSAA) {
text = NULL;
size = s;
currentSize = size;
color = c;
alpha = c[3];
alignment = ALIGN_CENTER | ALIGN_MIDDLE;
maxWidth = presetMaxWidth;
wrapMode = 0;
textWidth = 0;
font = presentFont;
linestodraw = MAX_LINES_TO_DRAW;
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
textScrollDelay = TEXT_SCROLL_DELAY;
defaultBlur = 4.0f;
blurGlowIntensity = 0.0f;
blurAlpha = 0.0f;
blurGlowColor = glm::vec4(0.0f);
internalRenderingScale = SSAA;
if(t) {
text = new (std::nothrow) wchar_t[wcslen(t)+1];
if(!text)
return;
wcscpy(text, t);
textWidth = font->getWidth(text, currentSize);
}
}
/**
* Constructor for the GuiText class, uses presets
*/
GuiText::GuiText(const char * t) {
text = NULL;
size = presetSize;
currentSize = size;
color = glm::vec4(presetColor.r, presetColor.g, presetColor.b, presetColor.a);
alpha = presetColor.a;
alignment = presetAlignment;
maxWidth = presetMaxWidth;
wrapMode = 0;
textWidth = 0;
font = presentFont;
linestodraw = MAX_LINES_TO_DRAW;
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
textScrollDelay = TEXT_SCROLL_DELAY;
defaultBlur = 4.0f;
blurGlowIntensity = 0.0f;
blurAlpha = 0.0f;
blurGlowColor = glm::vec4(0.0f);
internalRenderingScale = presetInternalRenderingScale;
if(t) {
text = FreeTypeGX::charToWideChar(t);
if(!text)
return;
textWidth = font->getWidth(text, currentSize);
}
}
/**
* Destructor for the GuiText class.
*/
GuiText::~GuiText() {
if(text)
delete [] text;
text = NULL;
clearDynamicText();
}
void GuiText::setText(const char * t) {
if(text)
delete [] text;
text = NULL;
clearDynamicText();
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
if(t) {
text = FreeTypeGX::charToWideChar(t);
if(!text)
return;
textWidth = font->getWidth(text, currentSize);
}
}
void GuiText::setTextf(const char *format, ...) {
if(!format) {
setText((char *) NULL);
return;
}
int32_t max_len = strlen(format) + 8192;
char *tmp = new char[max_len];
va_list va;
va_start(va, format);
if((vsnprintf(tmp, max_len, format, va) >= 0) && tmp) {
setText(tmp);
}
va_end(va);
if(tmp)
delete [] tmp;
}
void GuiText::setText(const wchar_t * t) {
if(text)
delete [] text;
text = NULL;
clearDynamicText();
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
if(t) {
text = new (std::nothrow) wchar_t[wcslen(t)+1];
if(!text)
return;
wcscpy(text, t);
textWidth = font->getWidth(text, currentSize);
}
}
void GuiText::clearDynamicText() {
for(uint32_t i = 0; i < textDyn.size(); i++) {
if(textDyn[i])
delete [] textDyn[i];
}
textDyn.clear();
textDynWidth.clear();
}
void GuiText::setPresets(int32_t sz, const glm::vec4 & c, int32_t w, int32_t a, int32_t SSAA) {
presetSize = sz;
presetColor = (GX2ColorF32) {
(float)c.r / 255.0f, (float)c.g / 255.0f, (float)c.b / 255.0f, (float)c.a / 255.0f
};
presetMaxWidth = w;
presetAlignment = a;
presetInternalRenderingScale = SSAA;
}
void GuiText::setPresetFont(FreeTypeGX *f) {
presentFont = f;
}
void GuiText::setSSAA(int32_t SSAA) {
internalRenderingScale = SSAA;
}
void GuiText::setFontSize(int32_t s) {
size = s;
}
void GuiText::setMaxWidth(int32_t width, int32_t w) {
maxWidth = width;
wrapMode = w;
if(w == SCROLL_HORIZONTAL) {
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
textScrollDelay = TEXT_SCROLL_DELAY;
}
clearDynamicText();
}
void GuiText::setColor(const glm::vec4 & c) {
color = c;
alpha = c[3];
}
void GuiText::setBlurGlowColor(float blur, const glm::vec4 & c) {
blurGlowColor = c;
blurGlowIntensity = blur;
blurAlpha = c[3];
}
int32_t GuiText::getTextWidth(int32_t ind) {
if(ind < 0 || ind >= (int32_t) textDyn.size())
return this->getTextWidth();
return font->getWidth(textDyn[ind], currentSize);
}
const wchar_t * GuiText::getDynText(int32_t ind) {
if(ind < 0 || ind >= (int32_t) textDyn.size())
return text;
return textDyn[ind];
}
/**
* Change font
*/
bool GuiText::setFont(FreeTypeGX *f) {
if(!f)
return false;
font = f;
textWidth = font->getWidth(text, currentSize);
return true;
}
std::string GuiText::toUTF8(void) const {
if(!text)
return std::string();
char *pUtf8 = FreeTypeGX::wideCharToUTF8(text);
if(!pUtf8)
return std::string();
std::string strOutput(pUtf8);
delete [] pUtf8;
return strOutput;
}
void GuiText::makeDottedText() {
int32_t pos = textDyn.size();
textDyn.resize(pos + 1);
int32_t i = 0, currentWidth = 0;
textDyn[pos] = new (std::nothrow) wchar_t[maxWidth];
if(!textDyn[pos]) {
textDyn.resize(pos);
return;
}
while (text[i]) {
currentWidth += font->getCharWidth(text[i], currentSize, i > 0 ? text[i - 1] : 0);
if (currentWidth >= maxWidth && i > 2) {
textDyn[pos][i - 2] = '.';
textDyn[pos][i - 1] = '.';
textDyn[pos][i] = '.';
i++;
break;
}
textDyn[pos][i] = text[i];
i++;
}
textDyn[pos][i] = 0;
}
void GuiText::scrollText(uint32_t frameCount) {
if (textDyn.size() == 0) {
int32_t pos = textDyn.size();
int32_t i = 0, currentWidth = 0;
textDyn.resize(pos + 1);
textDyn[pos] = new (std::nothrow) wchar_t[maxWidth];
if(!textDyn[pos]) {
textDyn.resize(pos);
return;
}
while (text[i] && currentWidth < maxWidth) {
textDyn[pos][i] = text[i];
currentWidth += font->getCharWidth(text[i], currentSize, i > 0 ? text[i - 1] : 0);
++i;
}
textDyn[pos][i] = 0;
return;
}
if (frameCount % textScrollDelay != 0) {
return;
}
if (textScrollInitialDelay) {
--textScrollInitialDelay;
return;
}
int32_t stringlen = wcslen(text);
++textScrollPos;
if (textScrollPos > stringlen) {
textScrollPos = 0;
textScrollInitialDelay = TEXT_SCROLL_INITIAL_DELAY;
}
int32_t ch = textScrollPos;
int32_t pos = textDyn.size() - 1;
if (!textDyn[pos])
textDyn[pos] = new (std::nothrow) wchar_t[maxWidth];
if(!textDyn[pos]) {
textDyn.resize(pos);
return;
}
int32_t i = 0, currentWidth = 0;
while (currentWidth < maxWidth) {
if (ch > stringlen - 1) {
textDyn[pos][i++] = ' ';
currentWidth += font->getCharWidth(L' ', currentSize, ch > 0 ? text[ch - 1] : 0);
textDyn[pos][i++] = ' ';
currentWidth += font->getCharWidth(L' ', currentSize, L' ');
textDyn[pos][i++] = ' ';
currentWidth += font->getCharWidth(L' ', currentSize, L' ');
ch = 0;
if(currentWidth >= maxWidth)
break;
}
textDyn[pos][i] = text[ch];
currentWidth += font->getCharWidth(text[ch], currentSize, ch > 0 ? text[ch - 1] : 0);
++ch;
++i;
}
textDyn[pos][i] = 0;
}
void GuiText::wrapText() {
if (textDyn.size() > 0) return;
int32_t i = 0;
int32_t ch = 0;
int32_t linenum = 0;
int32_t lastSpace = -1;
int32_t lastSpaceIndex = -1;
int32_t currentWidth = 0;
while (text[ch] && linenum < linestodraw) {
if (linenum >= (int32_t) textDyn.size()) {
textDyn.resize(linenum + 1);
textDyn[linenum] = new (std::nothrow) wchar_t[maxWidth];
if(!textDyn[linenum]) {
textDyn.resize(linenum);
break;
}
}
textDyn[linenum][i] = text[ch];
textDyn[linenum][i + 1] = 0;
currentWidth += font->getCharWidth(text[ch], currentSize, ch > 0 ? text[ch - 1] : 0x0000);
if (currentWidth >= maxWidth || (text[ch] == '\n')) {
if(text[ch] == '\n') {
lastSpace = -1;
lastSpaceIndex = -1;
} else if (lastSpace >= 0) {
textDyn[linenum][lastSpaceIndex] = 0; // discard space, and everything after
ch = lastSpace; // go backwards to the last space
lastSpace = -1; // we have used this space
lastSpaceIndex = -1;
}
if (linenum + 1 == linestodraw && text[ch + 1] != 0x0000) {
if(i < 2)
i = 2;
textDyn[linenum][i - 2] = '.';
textDyn[linenum][i - 1] = '.';
textDyn[linenum][i] = '.';
textDyn[linenum][i + 1] = 0;
}
currentWidth = 0;
++linenum;
i = -1;
}
if (text[ch] == ' ' && i >= 0) {
lastSpace = ch;
lastSpaceIndex = i;
}
++ch;
++i;
}
}
/**
* Draw the text on screen
*/
void GuiText::draw(CVideo *pVideo) {
if(!text)
return;
if(!isVisible())
return;
color[3] = getAlpha();
blurGlowColor[3] = blurAlpha * getAlpha();
float finalRenderingScale = internalRenderingScale << 1;
int32_t newSize = size * getScale() * finalRenderingScale;
int32_t normal_size = size * getScale();
if(newSize != currentSize) {
currentSize = normal_size;
if(text)
textWidth = font->getWidth(text, normal_size);
}
float x_pos = getCenterX() * finalRenderingScale;
float y_pos = getCenterY() * finalRenderingScale;
if(maxWidth > 0 && maxWidth <= textWidth) {
if(wrapMode == DOTTED) { // text dotted
if(textDyn.size() == 0)
makeDottedText();
if(textDynWidth.size() != textDyn.size()) {
textDynWidth.resize(textDyn.size());
for(uint32_t i = 0; i < textDynWidth.size(); i++)
textDynWidth[i] = font->getWidth(textDyn[i], newSize);
}
if(textDyn.size() > 0)
font->drawText(pVideo, x_pos, y_pos, getDepth(), textDyn[textDyn.size()-1], newSize, color, alignment, textDynWidth[textDyn.size()-1], defaultBlur, blurGlowIntensity, blurGlowColor,finalRenderingScale);
}
else if(wrapMode == SCROLL_HORIZONTAL) {
scrollText(pVideo->getFrameCount());
if(textDyn.size() > 0)
font->drawText(pVideo, x_pos, y_pos, getDepth(), textDyn[textDyn.size()-1], newSize, color, alignment, maxWidth*finalRenderingScale, defaultBlur, blurGlowIntensity, blurGlowColor,finalRenderingScale);
} else if(wrapMode == WRAP) {
int32_t lineheight = newSize + 6;
int32_t yoffset = 0;
int32_t voffset = 0;
if(textDyn.size() == 0)
wrapText();
if(textDynWidth.size() != textDyn.size()) {
textDynWidth.resize(textDyn.size());
for(uint32_t i = 0; i < textDynWidth.size(); i++)
textDynWidth[i] = font->getWidth(textDyn[i], newSize);
}
if(alignment & ALIGN_MIDDLE)
voffset = (lineheight * (textDyn.size()-1)) >> 1;
for(uint32_t i = 0; i < textDyn.size(); i++) {
font->drawText(pVideo, x_pos, y_pos + voffset + yoffset, getDepth(), textDyn[i], newSize, color, alignment, textDynWidth[i], defaultBlur, blurGlowIntensity, blurGlowColor,finalRenderingScale);
yoffset -= lineheight;
}
}
} else {
uint16_t newtextWidth = font->getWidth(text, newSize);
font->drawText(pVideo, x_pos, y_pos, getDepth(), text, newSize, color, alignment, newtextWidth, defaultBlur, blurGlowIntensity, blurGlowColor,finalRenderingScale);
}
}
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