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libgui/source/gui/FreeTypeGX.cpp

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/*
* FreeTypeGX is a wrapper class for libFreeType which renders a compiled
* FreeType parsable font so a GX texture for Wii homebrew development.
* Copyright (C) 2008 Armin Tamzarian
* Modified by Dimok, 2015 for WiiU GX2
*
* This file is part of FreeTypeGX.
*
* FreeTypeGX is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FreeTypeGX 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FreeTypeGX. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gui/FreeTypeGX.h>
#include <gui/video/CVideo.h>
#include <gui/video/shaders/Texture2DShader.h>
using namespace std;
#define ALIGN4(x) (((x) + 3) & ~3)
/**
* Default constructor for the FreeTypeGX class.
*/
FreeTypeGX::FreeTypeGX(const uint8_t *fontBuffer, FT_Long bufferSize, bool lastFace) {
int32_t faceIndex = 0;
GX2InitSampler(&ftSampler, GX2_TEX_CLAMP_MODE_CLAMP_BORDER, GX2_TEX_XY_FILTER_MODE_LINEAR);
FT_Init_FreeType(&ftLibrary);
faceMutex.lock();
if (lastFace) {
FT_New_Memory_Face(ftLibrary, (FT_Byte *) fontBuffer, bufferSize, -1, &ftFace);
faceIndex = ftFace->num_faces - 1; // Use the last face
FT_Done_Face(ftFace);
ftFace = NULL;
}
FT_New_Memory_Face(ftLibrary, (FT_Byte *) fontBuffer, bufferSize, faceIndex, &ftFace);
ftKerningEnabled = FT_HAS_KERNING(ftFace);
faceMutex.unlock();
}
/**
* Default destructor for the FreeTypeGX class.
*/
FreeTypeGX::~FreeTypeGX() {
unloadFont();
faceMutex.lock();
FT_Done_Face(ftFace);
faceMutex.unlock();
FT_Done_FreeType(ftLibrary);
}
/**
* Convert a short char string to a wide char string.
*
* This routine converts a supplied short character string into a wide character string.
* Note that it is the user's responsibility to clear the returned buffer once it is no longer needed.
*
* @param strChar Character string to be converted.
* @return Wide character representation of supplied character string.
*/
wchar_t *FreeTypeGX::charToWideChar(const char *strChar) {
if (!strChar) { return NULL; }
size_t len = strlen(strChar) + 1;
wchar_t *strWChar = new (std::nothrow) wchar_t[len];
if (!strWChar) { return NULL; }
size_t bt = mbstowcs(strWChar, strChar, len);
if (bt == (size_t) -1) {
return NULL;
}
if (bt < --len) {
strWChar[bt] = 0;
}
return strWChar;
}
char *FreeTypeGX::wideCharToUTF8(const wchar_t *strChar) {
if (!strChar) {
return NULL;
}
size_t len = 0;
wchar_t wc;
for (size_t i = 0; strChar[i]; ++i) {
wc = strChar[i];
if (wc < 0x80) {
++len;
} else if (wc < 0x800) {
len += 2;
} else if (wc < 0x10000) {
len += 3;
} else {
len += 4;
}
}
char *pOut = new (std::nothrow) char[len];
if (!pOut) {
return NULL;
}
size_t n = 0;
for (size_t i = 0; strChar[i]; ++i) {
wc = strChar[i];
if (wc < 0x80) {
pOut[n++] = (char) wc;
} else if (wc < 0x800) {
pOut[n++] = (char) ((wc >> 6) | 0xC0);
pOut[n++] = (char) ((wc & 0x3F) | 0x80);
} else if (wc < 0x10000) {
pOut[n++] = (char) ((wc >> 12) | 0xE0);
pOut[n++] = (char) (((wc >> 6) & 0x3F) | 0x80);
pOut[n++] = (char) ((wc & 0x3F) | 0x80);
} else {
pOut[n++] = (char) (((wc >> 18) & 0x07) | 0xF0);
pOut[n++] = (char) (((wc >> 12) & 0x3F) | 0x80);
pOut[n++] = (char) (((wc >> 6) & 0x3F) | 0x80);
pOut[n++] = (char) ((wc & 0x3F) | 0x80);
}
}
pOut[n] = '\0';
return pOut;
}
/**
* Clears all loaded font glyph data.
*
* This routine clears all members of the font map structure and frees all allocated memory back to the system.
*/
void FreeTypeGX::unloadFont() {
map<int16_t, ftGX2Data>::iterator itr;
map<wchar_t, ftgxCharData>::iterator itr2;
fontDataMutex.lock();
for (itr = fontData.begin(); itr != fontData.end(); itr++) {
for (itr2 = itr->second.ftgxCharMap.begin(); itr2 != itr->second.ftgxCharMap.end(); itr2++) {
if (itr2->second.texture) {
if (itr2->second.texture->surface.image) {
free(itr2->second.texture->surface.image);
}
delete itr2->second.texture;
itr2->second.texture = NULL;
}
}
}
fontData.clear();
fontDataMutex.unlock();
}
/**
* Caches the given font glyph in the instance font texture buffer.
*
* This routine renders and stores the requested glyph's bitmap and relevant information into its own quickly addressible
* structure within an instance-specific map.
*
* @param charCode The requested glyph's character code.
* @return A pointer to the allocated font structure.
*/
ftgxCharData *FreeTypeGX::cacheGlyphData(wchar_t charCode, int16_t pixelSize) {
fontDataMutex.lock();
auto itr = fontData.find(pixelSize);
if (itr != fontData.end()) {
auto itr2 = itr->second.ftgxCharMap.find(charCode);
if (itr2 != itr->second.ftgxCharMap.end()) {
// Used cached value;
fontDataMutex.unlock();
return &itr2->second;
}
}
ftGX2Data *ftData = &fontData[pixelSize];
faceMutex.lock();
FT_Set_Pixel_Sizes(ftFace, 0, pixelSize);
ftData->ftgxAlign.ascender = (int16_t) ftFace->size->metrics.ascender >> 6;
ftData->ftgxAlign.descender = (int16_t) ftFace->size->metrics.descender >> 6;
FT_UInt gIndex;
uint16_t textureWidth = 0, textureHeight = 0;
gIndex = FT_Get_Char_Index(ftFace, (FT_ULong) charCode);
if (gIndex != 0 && FT_Load_Glyph(ftFace, gIndex, FT_LOAD_DEFAULT | FT_LOAD_RENDER) == 0) {
if (ftFace->glyph->format == FT_GLYPH_FORMAT_BITMAP) {
FT_Bitmap *glyphBitmap = &ftFace->glyph->bitmap;
textureWidth = ALIGN4(glyphBitmap->width);
textureHeight = ALIGN4(glyphBitmap->rows);
if (textureWidth == 0) {
textureWidth = 4;
}
if (textureHeight == 0) {
textureHeight = 4;
}
ftgxCharData *charData = &ftData->ftgxCharMap[charCode];
charData->renderOffsetX = (int16_t) ftFace->glyph->bitmap_left;
charData->glyphAdvanceX = (uint16_t) (ftFace->glyph->advance.x >> 6);
charData->glyphAdvanceY = (uint16_t) (ftFace->glyph->advance.y >> 6);
charData->glyphIndex = (uint32_t) gIndex;
charData->renderOffsetY = (int16_t) ftFace->glyph->bitmap_top;
charData->renderOffsetMax = (int16_t) ftFace->glyph->bitmap_top;
charData->renderOffsetMin = (int16_t) glyphBitmap->rows - ftFace->glyph->bitmap_top;
int16_t oldMax = ftData->ftgxAlign.max;
ftData->ftgxAlign.max = charData->renderOffsetMax > oldMax ? charData->renderOffsetMax : oldMax;
int16_t oldMin = ftData->ftgxAlign.min;
ftData->ftgxAlign.min = charData->renderOffsetMin > oldMin ? charData->renderOffsetMin : oldMin;
//! Initialize texture
charData->texture = new GX2Texture;
if (charData->texture) {
GX2InitTexture(charData->texture, textureWidth, textureHeight, 1, 0, GX2_SURFACE_FORMAT_UNORM_R5_G5_B5_A1, GX2_SURFACE_DIM_TEXTURE_2D, GX2_TILE_MODE_LINEAR_ALIGNED);
if (!loadGlyphData(glyphBitmap, charData)) {
delete charData->texture;
ftData->ftgxCharMap.erase(charCode);
charData = NULL;
}
} else {
charData = NULL;
}
faceMutex.unlock();
fontDataMutex.unlock();
return charData;
}
}
faceMutex.unlock();
fontDataMutex.unlock();
return NULL;
}
/**
* Locates each character in this wrapper's configured font face and proccess them.
*
* This routine locates each character in the configured font face and renders the glyph's bitmap.
* Each bitmap and relevant information is loaded into its own quickly addressible structure within an instance-specific map.
*/
uint16_t FreeTypeGX::cacheGlyphDataComplete(int16_t pixelSize) {
uint32_t i = 0;
FT_UInt gIndex;
faceMutex.lock();
FT_ULong charCode = FT_Get_First_Char(ftFace, &gIndex);
while (gIndex != 0) {
if (cacheGlyphData(charCode, pixelSize) != NULL) { ++i; }
charCode = FT_Get_Next_Char(ftFace, charCode, &gIndex);
}
faceMutex.unlock();
return (uint16_t) (i);
}
/**
* Loads the rendered bitmap into the relevant structure's data buffer.
*
* This routine does a simple byte-wise copy of the glyph's rendered 8-bit grayscale bitmap into the structure's buffer.
* Each byte is converted from the bitmap's intensity value into the a uint32_t RGBA value.
*
* @param bmp A pointer to the most recently rendered glyph's bitmap.
* @param charData A pointer to an allocated ftgxCharData structure whose data represent that of the last rendered glyph.
*/
bool FreeTypeGX::loadGlyphData(FT_Bitmap *bmp, ftgxCharData *charData) {
charData->texture->surface.image = (uint8_t *) memalign(charData->texture->surface.alignment, charData->texture->surface.imageSize);
if (!charData->texture->surface.image) {
return false;
}
memset(charData->texture->surface.image, 0x00, charData->texture->surface.imageSize);
uint8_t *src = (uint8_t *) bmp->buffer;
uint16_t *dst = (uint16_t *) charData->texture->surface.image;
uint32_t x, y;
for (y = 0; y < bmp->rows; y++) {
for (x = 0; x < bmp->width; x++) {
uint8_t intensity = src[y * bmp->width + x] >> 3;
dst[y * charData->texture->surface.pitch + x] = intensity ? ((intensity << 11) | (intensity << 6) | (intensity << 1) | 1) : 0;
}
}
GX2Invalidate(GX2_INVALIDATE_MODE_CPU_TEXTURE, charData->texture->surface.image, charData->texture->surface.imageSize);
return true;
}
/**
* Determines the x offset of the rendered string.
*
* This routine calculates the x offset of the rendered string based off of a supplied positional format parameter.
*
* @param width Current pixel width of the string.
* @param format Positional format of the string.
*/
int16_t FreeTypeGX::getStyleOffsetWidth(uint16_t width, uint16_t format) {
if (format & FTGX_JUSTIFY_LEFT) {
return 0;
} else if (format & FTGX_JUSTIFY_CENTER) {
return -(width >> 1);
} else if (format & FTGX_JUSTIFY_RIGHT) {
return -width;
}
return 0;
}
/**
* Determines the y offset of the rendered string.
*
* This routine calculates the y offset of the rendered string based off of a supplied positional format parameter.
*
* @param offset Current pixel offset data of the string.
* @param format Positional format of the string.
*/
int16_t FreeTypeGX::getStyleOffsetHeight(int16_t format, uint16_t pixelSize) {
fontDataMutex.lock();
auto itr = fontData.find(pixelSize);
if (itr == fontData.end()) {
fontDataMutex.unlock();
return 0;
}
int16_t res = 0;
switch (format & FTGX_ALIGN_MASK) {
case FTGX_ALIGN_TOP:
res = itr->second.ftgxAlign.descender;
break;
case FTGX_ALIGN_MIDDLE:
default:
res = (itr->second.ftgxAlign.ascender + itr->second.ftgxAlign.descender + 1) >> 1;
break;
case FTGX_ALIGN_BOTTOM:
res = itr->second.ftgxAlign.ascender;
break;
case FTGX_ALIGN_BASELINE:
res = 0;
break;
case FTGX_ALIGN_GLYPH_TOP:
res = itr->second.ftgxAlign.max;
break;
case FTGX_ALIGN_GLYPH_MIDDLE:
res = (itr->second.ftgxAlign.max + itr->second.ftgxAlign.min + 1) >> 1;
break;
case FTGX_ALIGN_GLYPH_BOTTOM:
res = itr->second.ftgxAlign.min;
break;
}
fontDataMutex.unlock();
return res;
}
/**
* Processes the supplied text string and prints the results at the specified coordinates.
*
* This routine processes each character of the supplied text string, loads the relevant preprocessed bitmap buffer,
* a texture from said buffer, and loads the resultant texture into the EFB.
*
* @param x Screen X coordinate at which to output the text.
* @param y Screen Y coordinate at which to output the text. Note that this value corresponds to the text string origin and not the top or bottom of the glyphs.
* @param text NULL terminated string to output.
* @param color Optional color to apply to the text characters. If not specified default value is ftgxWhite: (GXColor){0xff, 0xff, 0xff, 0xff}
* @param textStyle Flags which specify any styling which should be applied to the rendered string.
* @return The number of characters printed.
*/
uint16_t FreeTypeGX::drawText(CVideo *video, int16_t x, int16_t y, int16_t z, const wchar_t *text, int16_t pixelSize, const glm::vec4 &color, uint16_t textStyle, uint16_t textWidth, const float &textBlur, const float &colorBlurIntensity,
const glm::vec4 &blurColor, const float &superSamplingScale) {
if (!text) { return 0; }
uint16_t fullTextWidth = (textWidth > 0) ? textWidth : getWidth(text, pixelSize);
uint16_t x_pos = x, printed = 0;
uint16_t x_offset = 0, y_offset = 0;
FT_Vector pairDelta;
if (textStyle & FTGX_JUSTIFY_MASK) {
x_offset = getStyleOffsetWidth(fullTextWidth, textStyle);
}
if (textStyle & FTGX_ALIGN_MASK) {
y_offset = getStyleOffsetHeight(textStyle, pixelSize);
}
int32_t i = 0;
while (text[i]) {
ftgxCharData *glyphData = cacheGlyphData(text[i], pixelSize);
if (glyphData != NULL) {
if (ftKerningEnabled && i > 0) {
fontDataMutex.lock();
faceMutex.lock();
FT_Get_Kerning(ftFace, fontData[pixelSize].ftgxCharMap[text[i - 1]].glyphIndex, glyphData->glyphIndex, FT_KERNING_DEFAULT, &pairDelta);
faceMutex.unlock();
fontDataMutex.unlock();
x_pos += (pairDelta.x >> 6);
}
copyTextureToFramebuffer(video, glyphData->texture, x_pos + glyphData->renderOffsetX + x_offset, y + glyphData->renderOffsetY - y_offset, z, color, textBlur, colorBlurIntensity, blurColor, superSamplingScale);
x_pos += glyphData->glyphAdvanceX;
++printed;
}
++i;
}
return printed;
}
/**
* Processes the supplied string and return the width of the string in pixels.
*
* This routine processes each character of the supplied text string and calculates the width of the entire string.
* Note that if precaching of the entire font set is not enabled any uncached glyph will be cached after the call to this function.
*
* @param text NULL terminated string to calculate.
* @return The width of the text string in pixels.
*/
uint16_t FreeTypeGX::getWidth(const wchar_t *text, int16_t pixelSize) {
if (!text) { return 0; }
uint16_t strWidth = 0;
int32_t i = 0;
while (text[i]) {
strWidth += getCharWidth(text[i], pixelSize, i > 0 ? text[i - 1] : 0);
++i;
}
return strWidth;
}
/**
* Single char width
*/
uint16_t FreeTypeGX::getCharWidth(const wchar_t wChar, int16_t pixelSize, const wchar_t prevChar) {
uint16_t strWidth = 0;
ftgxCharData *glyphData = cacheGlyphData(wChar, pixelSize);
if (glyphData != NULL) {
if (ftKerningEnabled && prevChar != 0x0000) {
FT_Vector pairDelta;
faceMutex.lock();
fontDataMutex.lock();
FT_Get_Kerning(ftFace, fontData[pixelSize].ftgxCharMap[prevChar].glyphIndex, glyphData->glyphIndex, FT_KERNING_DEFAULT, &pairDelta);
fontDataMutex.unlock();
faceMutex.unlock();
strWidth += pairDelta.x >> 6;
}
strWidth += glyphData->glyphAdvanceX;
}
return strWidth;
}
/**
* Processes the supplied string and return the height of the string in pixels.
*
* This routine processes each character of the supplied text string and calculates the height of the entire string.
* Note that if precaching of the entire font set is not enabled any uncached glyph will be cached after the call to this function.
*
* @param text NULL terminated string to calculate.
* @return The height of the text string in pixels.
*/
uint16_t FreeTypeGX::getHeight(const wchar_t *text, int16_t pixelSize) {
if (text == NULL) {
return 0;
}
int16_t strMax = 0, strMin = 0;
int32_t i = 0;
while (text[i]) {
ftgxCharData *glyphData = cacheGlyphData(text[i], pixelSize);
if (glyphData != NULL) {
strMax = glyphData->renderOffsetMax > strMax ? glyphData->renderOffsetMax : strMax;
strMin = glyphData->renderOffsetMin > strMin ? glyphData->renderOffsetMin : strMin;
}
++i;
}
return strMax + strMin;
}
/**
* Copies the supplied texture quad to the EFB.
*
* This routine uses the in-built GX quad builder functions to define the texture bounds and location on the EFB target.
*
* @param texObj A pointer to the glyph's initialized texture object.
* @param texWidth The pixel width of the texture object.
* @param texHeight The pixel height of the texture object.
* @param screenX The screen X coordinate at which to output the rendered texture.
* @param screenY The screen Y coordinate at which to output the rendered texture.
* @param color Color to apply to the texture.
*/
void FreeTypeGX::copyTextureToFramebuffer(CVideo *pVideo, GX2Texture *texture, int16_t x, int16_t y, int16_t z, const glm::vec4 &color, const float &defaultBlur, const float &blurIntensity, const glm::vec4 &blurColor,
const float &superSamplingScale) {
static const float imageAngle = 0.0f;
static const float blurScale = (2.0f);
float offsetLeft = blurScale * (1.0f / superSamplingScale) * ((float) x + 0.5f * (float) texture->surface.width) * (float) pVideo->getWidthScaleFactor();
float offsetTop = blurScale * (1.0f / superSamplingScale) * ((float) y - 0.5f * (float) texture->surface.height) * (float) pVideo->getHeightScaleFactor();
float widthScale = blurScale * (1.0f / superSamplingScale) * (float) texture->surface.width * pVideo->getWidthScaleFactor();
float heightScale = blurScale * (1.0f / superSamplingScale) * (float) texture->surface.height * pVideo->getHeightScaleFactor();
glm::vec3 positionOffsets(offsetLeft, offsetTop, (float) z);
//! blur doubles due to blur we have to scale the texture
glm::vec3 scaleFactor(widthScale, heightScale, 1.0f);
glm::vec3 blurDirection;
blurDirection[2] = 1.0f;
Texture2DShader::instance()->setShaders();
Texture2DShader::instance()->setAttributeBuffer();
Texture2DShader::instance()->setAngle(imageAngle);
Texture2DShader::instance()->setOffset(positionOffsets);
Texture2DShader::instance()->setScale(scaleFactor);
Texture2DShader::instance()->setTextureAndSampler(texture, &ftSampler);
if (blurIntensity > 0.0f) {
//! glow blur color
Texture2DShader::instance()->setColorIntensity(blurColor);
//! glow blur horizontal
blurDirection[0] = blurIntensity;
blurDirection[1] = 0.0f;
Texture2DShader::instance()->setBlurring(blurDirection);
Texture2DShader::instance()->draw();
//! glow blur vertical
blurDirection[0] = 0.0f;
blurDirection[1] = blurIntensity;
Texture2DShader::instance()->setBlurring(blurDirection);
Texture2DShader::instance()->draw();
}
//! set text color
Texture2DShader::instance()->setColorIntensity(color);
//! blur horizontal
blurDirection[0] = defaultBlur;
blurDirection[1] = 0.0f;
Texture2DShader::instance()->setBlurring(blurDirection);
Texture2DShader::instance()->draw();
//! blur vertical
blurDirection[0] = 0.0f;
blurDirection[1] = defaultBlur;
Texture2DShader::instance()->setBlurring(blurDirection);
Texture2DShader::instance()->draw();
}
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