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openglosd.cpp
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openglosd.cpp
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#define __STL_CONFIG_H
#include <algorithm>
#include "openglosd.h"
#include <inttypes.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef GRIDPOINTS
#include <string>
#endif
#include <sys/ioctl.h>
#include "misc.h"
#ifdef WRITE_PNG
#include <png.h>
extern int ConfigWritePngs;
#endif
/* This is needed for the GLES2 GL_CLAMP_TO_BORDER workaround */
#define BORDERCOLOR 0x00000000
/* This maybe useful for skin developing */
#ifdef GRIDPOINTS
#define GRIDPOINTSTEXT 1
#define GRIDRECT 1
#define GRIDTEXT 0
#define GRIDPOINTSIZE 3
#define GRIDPOINTOFFSET 4
#define GRIDPOINTSTXTSIZE 14
#define GRIDPOINTBG clrTransparent
#define GRIDPOINTCLR 0xFFFF0000
#endif
/****************************************************************************************
* Helpers
****************************************************************************************/
#ifdef WRITE_PNG
int writeImage(char* filename, int width, int height, void *buffer, char* title)
{
int code;
FILE *fp;
png_structp png_ptr;
png_infop info_ptr;
// Open file for writing (binary mode)
fp = fopen(filename, "wb");
if (fp == NULL) {
Error("WritePng: Could not open file %s for writing", filename);
code = 1;
goto finalise;
}
// Initialize write structure
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (png_ptr == NULL) {
Error("WritePng: Could not allocate write struct");
code = 1;
goto finalise;
}
// Initialize info structure
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL) {
Error("WritePng: Could not allocate info struct");
code = 1;
goto finalise;
}
// Setup Exception handling
if (setjmp(png_jmpbuf(png_ptr))) {
Error("WritePng: Error during png creation");
code = 1;
goto finalise;
}
png_init_io(png_ptr, fp);
// Write header (8 bit colour depth)
png_set_IHDR(png_ptr, info_ptr, width, height,
8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
// Set title
if (title != NULL) {
png_text title_text;
title_text.compression = PNG_TEXT_COMPRESSION_NONE;
title_text.key = strdup("Title");
title_text.text = title;
png_set_text(png_ptr, info_ptr, &title_text, 1);
}
png_write_info(png_ptr, info_ptr);
// Write image data
int i;
for (i = height - 1; i >= 0; i--) {
png_write_row(png_ptr, (png_bytep)buffer + i * width * 4);
}
// End write
png_write_end(png_ptr, NULL);
code = 0;
finalise:
if (fp != NULL) fclose(fp);
if (info_ptr != NULL) png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1);
if (png_ptr != NULL) png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
return code;
}
#endif
#ifdef WRITE_PNG
void writePng(int x, int y, int w, int h, bool oFb) {
GL_CHECK(glFinish());
GLubyte result[w * h * 4];
static int scr_nr = 0;
char filename[40];
GLenum fbstatus;
GL_CHECK(fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
if(fbstatus != GL_FRAMEBUFFER_COMPLETE)
Error("Framebuffer is not complete! %d", fbstatus);
GL_CHECK(glReadPixels(x, y, w, h, GL_RGBA, GL_UNSIGNED_BYTE, &result));
if (oFb) {
snprintf(filename, sizeof(filename), "/tmp/%03doFb.png", scr_nr++);
} else {
snprintf(filename, sizeof(filename), "/tmp/%03dbFb.png", scr_nr++);
}
writeImage(filename, w, h, &result, strdup("osd"));
}
#endif
void ConvertColor(const GLint &colARGB, glm::vec4 &col) {
col.a = ((colARGB & 0xFF000000) >> 24) / 255.0;
col.r = ((colARGB & 0x00FF0000) >> 16) / 255.0;
col.g = ((colARGB & 0x0000FF00) >> 8 ) / 255.0;
col.b = ((colARGB & 0x000000FF) ) / 255.0;
}
void glCheckError(const char *stmt, const char *fname, int line) {
GLint err = glGetError();
if (err != GL_NO_ERROR)
Error("GL Error (0x%08x): %s failed at %s:%i", err, stmt, fname, line);
}
void eglCheckError(const char *stmt, const char *fname, int line) {
EGLint err = eglGetError();
if (err != EGL_SUCCESS)
Error("EGL ERROR (0x%08x): %s failed at %s:%i", err, stmt, fname, line);
}
void eglAcquireContext()
{
VideoRender *render = (VideoRender *)GetVideoRender();
if (!render) {
Fatal("failed to get VideoRender");
}
EGL_CHECK(eglMakeCurrent(render->eglDisplay, render->eglSurface, render->eglSurface, render->eglContext));
}
void eglReleaseContext()
{
VideoRender *render = (VideoRender *)GetVideoRender();
if (!render) {
Fatal("failed to get VideoRender");
}
EGL_CHECK(eglMakeCurrent(render->eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT));
}
/****************************************************************************************
* cShader
****************************************************************************************/
const char *rectVertexShader =
"#version 100 \n\
\
attribute vec2 position; \
varying vec4 rectCol; \
uniform vec4 inColor; \
uniform mat4 projection; \
\
void main() \
{ \
gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
rectCol = inColor; \
} \
";
const char *rectFragmentShader =
"#version 100 \n\
precision mediump float; \
varying vec4 rectCol; \
\
void main() \
{ \
gl_FragColor = rectCol; \
} \
";
const char *textureVertexShader =
"#version 100 \n\
\
attribute vec2 position; \
attribute vec2 texCoords; \
\
varying vec2 TexCoords; \
varying vec4 alphaValue;\
varying vec4 bColorValue;\
\
uniform vec4 bColor; \
uniform mat4 projection; \
uniform vec4 alpha; \
\
void main() \
{ \
gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
TexCoords = texCoords; \
alphaValue = alpha; \
bColorValue = bColor; \
} \
";
const char *textureFragmentShader =
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 alphaValue; \
varying vec4 bColorValue; \
\
uniform sampler2D screenTexture; \
\
float clamp_to_border_factor (vec2 coords) \
{ \
bvec2 out1 = greaterThan (coords, vec2 (1,1)); \
bvec2 out2 = lessThan (coords, vec2 (0,0)); \
bool do_clamp = (any (out1) || any (out2)); \
return float (!do_clamp); \
} \
\
void main() \
{ \
vec4 color = texture2D(screenTexture, TexCoords) * alphaValue; \
float f = clamp_to_border_factor (TexCoords); \
gl_FragColor = mix (bColorValue, color, f); \
} \
";
const char *textureFragmentShaderSwapBR =
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 alphaValue; \
varying vec4 bColorValue; \
\
uniform sampler2D screenTexture; \
\
float clamp_to_border_factor (vec2 coords) \
{ \
bvec2 out1 = greaterThan (coords, vec2 (1,1)); \
bvec2 out2 = lessThan (coords, vec2 (0,0)); \
bool do_clamp = (any (out1) || any (out2)); \
return float (!do_clamp); \
} \
\
void main() \
{ \
vec4 color = texture2D(screenTexture, TexCoords) * alphaValue; \
vec4 color_swapped = vec4(color.b, color.g, color.r, color.a); \
float f = clamp_to_border_factor (TexCoords); \
gl_FragColor = mix (bColorValue, color_swapped, f); \
} \
";
const char *textVertexShader =
"#version 100 \n\
\
attribute vec2 position; \
attribute vec2 texCoords; \
\
varying vec2 TexCoords; \
varying vec4 textColor; \
\
uniform mat4 projection; \
uniform vec4 inColor; \
\
void main() \
{ \
gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
TexCoords = texCoords; \
textColor = inColor; \
} \
";
const char *textFragmentShader =
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 textColor; \
\
uniform sampler2D glyphTexture; \
\
void main() \
{ \
vec4 sampled = vec4(1.0, 1.0, 1.0, texture2D(glyphTexture, TexCoords).r); \
gl_FragColor = textColor * sampled; \
} \
";
static cShader *Shaders[stCount];
void cShader::Use(void) {
GL_CHECK(glUseProgram(id));
}
bool cShader::Load(eShaderType type) {
this->type = type;
const char *vertexCode = NULL;
const char *fragmentCode = NULL;
switch (type) {
case stRect:
vertexCode = rectVertexShader;
fragmentCode = rectFragmentShader;
break;
case stTexture:
vertexCode = textureVertexShader;
fragmentCode = textureFragmentShader;
break;
case stTextureSwapBR:
vertexCode = textureVertexShader;
fragmentCode = textureFragmentShaderSwapBR;
break;
case stText:
vertexCode = textVertexShader;
fragmentCode = textFragmentShader;
break;
default:
Error("Shader: unknown shader type");
break;
}
if (vertexCode == NULL || fragmentCode == NULL) {
Error("Shader: error reading shader");
return false;
}
if (!Compile(vertexCode, fragmentCode)) {
Error("Shader: error compiling shader");
return false;
}
return true;
}
void cShader::SetFloat(const GLchar *name, GLfloat value) {
GL_CHECK(glUniform1f(glGetUniformLocation(id, name), value));
}
void cShader::SetInteger(const GLchar *name, GLint value) {
GL_CHECK(glUniform1i(glGetUniformLocation(id, name), value));
}
void cShader::SetVector2f(const GLchar *name, GLfloat x, GLfloat y) {
GL_CHECK(glUniform2f(glGetUniformLocation(id, name), x, y));
}
void cShader::SetVector3f(const GLchar *name, GLfloat x, GLfloat y, GLfloat z) {
GL_CHECK(glUniform3f(glGetUniformLocation(id, name), x, y, z));
}
void cShader::SetVector4f(const GLchar *name, GLfloat x, GLfloat y, GLfloat z, GLfloat w) {
GL_CHECK(glUniform4f(glGetUniformLocation(id, name), x, y, z, w));
}
void cShader::SetMatrix4(const GLchar *name, const glm::mat4 &matrix) {
GL_CHECK(glUniformMatrix4fv(glGetUniformLocation(id, name), 1, GL_FALSE, glm::value_ptr(matrix)));
}
bool cShader::Compile(const char *vertexCode, const char *fragmentCode) {
GLuint sVertex, sFragment;
// Vertex Shader
GL_CHECK(sVertex = glCreateShader(GL_VERTEX_SHADER));
GL_CHECK(glShaderSource(sVertex, 1, &vertexCode, NULL));
GL_CHECK(glCompileShader(sVertex));
if (!CheckCompileErrors(sVertex))
return false;
// Fragment Shader
GL_CHECK(sFragment = glCreateShader(GL_FRAGMENT_SHADER));
GL_CHECK(glShaderSource(sFragment, 1, &fragmentCode, NULL));
GL_CHECK(glCompileShader(sFragment));
if (!CheckCompileErrors(sFragment))
return false;
// link Program
GL_CHECK(id = glCreateProgram());
GL_CHECK(glAttachShader(id, sVertex));
GL_CHECK(glAttachShader(id, sFragment));
GL_CHECK(glBindAttribLocation(id, 0, "position"));
GL_CHECK(glBindAttribLocation(id, 1, "texCoords"));
GL_CHECK(glLinkProgram(id));
if (!CheckCompileErrors(id, true))
return false;
// Delete the shaders as they're linked into our program now and no longer necessery
GL_CHECK(glDeleteShader(sVertex));
GL_CHECK(glDeleteShader(sFragment));
return true;
}
bool cShader::CheckCompileErrors(GLuint object, bool program) {
GLint success;
GLchar infoLog[1024];
if (!program) {
GL_CHECK(glGetShaderiv(object, GL_COMPILE_STATUS, &success));
if (!success) {
GL_CHECK(glGetShaderInfoLog(object, 1024, NULL, infoLog));
Error("Shader: Compile-time error: Type: %d - %s", type, infoLog);
return false;
}
} else {
GL_CHECK(glGetProgramiv(object, GL_LINK_STATUS, &success));
if (!success) {
GL_CHECK(glGetProgramInfoLog(object, 1024, NULL, infoLog));
Error("Shader: Link-time error: Type: %d - %s", type, infoLog);
return false;
}
}
return true;
}
#define KERNING_UNKNOWN (-10000)
/****************************************************************************************
* cOglGlyph
****************************************************************************************/
cOglGlyph::cOglGlyph(FT_ULong charCode, FT_BitmapGlyph ftGlyph) {
this->charCode = charCode;
bearingLeft = ftGlyph->left;
bearingTop = ftGlyph->top;
width = ftGlyph->bitmap.width;
height = ftGlyph->bitmap.rows;
advanceX = ftGlyph->root.advance.x >> 16; //value in 1/2^16 pixel
LoadTexture(ftGlyph);
}
cOglGlyph::~cOglGlyph(void) {
if (texture)
GL_CHECK(glDeleteTextures(1, &texture));
}
int cOglGlyph::GetKerningCache(FT_ULong prevSym) {
for (int i = kerningCache.Size(); --i > 0; ) {
if (kerningCache[i].prevSym == prevSym)
return kerningCache[i].kerning;
}
return KERNING_UNKNOWN;
}
void cOglGlyph::SetKerningCache(FT_ULong prevSym, int kerning) {
kerningCache.Append(tKerning(prevSym, kerning));
}
void cOglGlyph::BindTexture(void) {
GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
}
void cOglGlyph::LoadTexture(FT_BitmapGlyph ftGlyph) {
// Disable byte-alignment restriction
GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
GL_CHECK(glGenTextures(1, &texture));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
GL_CHECK(glTexImage2D(
GL_TEXTURE_2D,
0,
GL_LUMINANCE,
ftGlyph->bitmap.width,
ftGlyph->bitmap.rows,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
ftGlyph->bitmap.buffer
));
// Set texture options
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 4));
}
/****************************************************************************************
* cOglAtlasGlyph
****************************************************************************************/
cOglAtlasGlyph::cOglAtlasGlyph(FT_ULong charCode, float advanceX, float advanceY,
float width, float height,
float bearingLeft, float bearingTop,
float xoffset, float yoffset) {
this->charCode = charCode;
this->bearingLeft = bearingLeft;
this->bearingTop = bearingTop;
this->width = width;
this->height = height;
this->advanceX = advanceX; //value in 1/2^16 pixel
this->advanceY = advanceY; //value in 1/2^16 pixel
this->xoffset = xoffset;
this->yoffset = yoffset;
}
cOglAtlasGlyph::~cOglAtlasGlyph(void) {
}
int cOglAtlasGlyph::GetKerningCache(FT_ULong prevSym) {
for (int i = kerningCache.Size(); --i > 0; ) {
if (kerningCache[i].prevSym == prevSym)
return kerningCache[i].kerning;
}
return KERNING_UNKNOWN;
}
void cOglAtlasGlyph::SetKerningCache(FT_ULong prevSym, int kerning) {
kerningCache.Append(tKerning(prevSym, kerning));
}
/****************************************************************************************
* cOglFontAtlas
****************************************************************************************/
cOglFontAtlas::cOglFontAtlas(FT_Face face, int height) {
this->fontheight = height;
FT_Set_Pixel_Sizes(face, 0, height);
FT_GlyphSlot g = face->glyph;
int roww = 0;
int rowh = 0;
w = 0;
h = 0;
/* Find the minimum size for the texture holding all visible ASCII characters */
for (int i = MIN_CHARCODE; i <= MAX_CHARCODE; i++) {
if (FT_Load_Char(face, i, FT_LOAD_NO_BITMAP)) {
Debug2(L_OPENGL, "Loading char %d failed!", i);
continue;
}
// do some glyph manipulation
FT_Glyph ftGlyph;
FT_Stroker stroker;
if (FT_Stroker_New(g->library, &stroker)) {
Error("FT_Stroker_New error!");
return;
}
float outlineWidth = 0.25f;
FT_Stroker_Set(stroker, (int)(outlineWidth * 64),
FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
if (FT_Get_Glyph(g, &ftGlyph)) {
Error("FT_Get_Glyph error!");
return;
}
if (FT_Glyph_StrokeBorder(&ftGlyph, stroker, 0, 1)) {
Error("FT_Glyph_StrokeBoder error!");
return;
}
FT_Stroker_Done(stroker);
if (FT_Glyph_To_Bitmap(&ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
Error("FT_Glyph_To_Bitmap error!");
return;
}
FT_BitmapGlyph bGlyph = (FT_BitmapGlyph)ftGlyph;
if (roww + bGlyph->bitmap.width + 1 >= MAX_ATLAS_WIDTH) {
w = std::max(w, roww);
h += rowh;
roww = 0;
rowh = 0;
}
roww += bGlyph->bitmap.width + 1;
rowh = std::max(rowh, (int)bGlyph->bitmap.rows);
FT_Done_Glyph(ftGlyph);
}
w = std::max(w, roww);
h += rowh;
/* Create a texture that will be used to hold all ASCII glyphs */
GL_CHECK(glGenTextures(1, &tex));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, tex));
GL_CHECK(glTexImage2D(
GL_TEXTURE_2D,
0,
GL_LUMINANCE,
w,
h,
0,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
0
));
GL_CHECK(glPixelStorei(GL_UNPACK_ALIGNMENT, 1));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
int ox = 0;
int oy = 0;
rowh = 0;
// Now do the real upload
for (int i = MIN_CHARCODE; i <= MAX_CHARCODE; i++) {
if (FT_Load_Char(face, i, FT_LOAD_NO_BITMAP)) {
Warning("Loading char %c failed!", i);
continue;
}
// do some glyph manipulation
FT_Glyph ftGlyph;
FT_Stroker stroker;
if (FT_Stroker_New(g->library, &stroker)) {
Error("FT_Stroker_New error!");
return;
}
float outlineWidth = 0.25f;
FT_Stroker_Set(stroker, (int)(outlineWidth * 64),
FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
if (FT_Get_Glyph(g, &ftGlyph)) {
Error("FT_Get_Glyph error!");
return;
}
if (FT_Glyph_StrokeBorder(&ftGlyph, stroker, 0, 1)) {
Error("FT_Glyph_StrokeBoder error!");
return;
}
FT_Stroker_Done(stroker);
if (FT_Glyph_To_Bitmap(&ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
Error("FT_Glyph_To_Bitmap error!");
return;
}
FT_BitmapGlyph bGlyph = (FT_BitmapGlyph)ftGlyph;
// pushing the glyphs to the texture
if (ox + bGlyph->bitmap.width + 1 >= MAX_ATLAS_WIDTH) {
oy += rowh;
rowh = 0;
ox = 0;
}
GL_CHECK(glTexSubImage2D(
GL_TEXTURE_2D,
0,
ox,
oy,
bGlyph->bitmap.width,
bGlyph->bitmap.rows,
GL_LUMINANCE,
GL_UNSIGNED_BYTE,
bGlyph->bitmap.buffer
));
float ax = bGlyph->root.advance.x >> 16; // AdvanceX
float ay = bGlyph->root.advance.y >> 16; // AdvanceX
float bw = bGlyph->bitmap.width; // Width
float bh = bGlyph->bitmap.rows; // Height
float bl = bGlyph->left; // BearingLeft
float bt = bGlyph->top; // BearingTop
float tx = ox / (float)w;
float ty = oy / (float)h;
Glyph[i] = new cOglAtlasGlyph(i, ax, ay, bw, bh, bl, bt, tx, ty);
rowh = std::max(rowh, (int)bGlyph->bitmap.rows);
ox += bGlyph->bitmap.width + 1;
FT_Done_Glyph(ftGlyph);
}
GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
Debug2(L_OPENGL, "Created a %d x %d (%d kB) FontAtlas for fontsize %d, rowh %d, roww %d", w, h, w * h / 1024, height, rowh, roww);
}
cOglFontAtlas::~cOglFontAtlas(void) {
if (tex)
GL_CHECK(glDeleteTextures(1, &tex));
}
cOglAtlasGlyph* cOglFontAtlas::GetGlyph(int sym) const {
return Glyph[sym];
}
void cOglFontAtlas::BindTexture(void) {
GL_CHECK(glBindTexture(GL_TEXTURE_2D, tex));
}
/****************************************************************************************
* cOglFont
****************************************************************************************/
FT_Library cOglFont::ftLib = 0;
cList<cOglFont> *cOglFont::fonts = 0;
bool cOglFont::initiated = false;
cOglFont::cOglFont(const char *fontName, int charHeight) : name(fontName) {
size = charHeight;
height = 0;
bottom = 0;
int error = FT_New_Face(ftLib, fontName, 0, &face);
if (error)
Error("failed to open %s!", *name);
FT_ULong charcode;
FT_UInt gindex;
int count = 0;
int min_index = 0;
int max_index = 0;
charcode = FT_Get_First_Char(face, &gindex);
min_index = gindex;
max_index = gindex;
while (gindex != 0) {
count++;
charcode = FT_Get_Next_Char(face, charcode, &gindex);
min_index = std::min(min_index, (int)gindex);
max_index = std::max(max_index, (int)gindex);
}
FT_Set_Char_Size(face, 0, charHeight * 64, 0, 0);
height = (face->size->metrics.ascender - face->size->metrics.descender + 63) / 64;
bottom = abs((face->size->metrics.descender - 63) / 64);
this->atlas = new cOglFontAtlas(face, charHeight);
Debug2(L_OPENGL, "Created new font: %s (%d) height: %d, bottom: %d - %d chars (%d - %d)", fontName, charHeight, height, bottom, count, min_index, max_index);
}
cOglFont::~cOglFont(void) {
FT_Done_Face(face);
}
cOglFont *cOglFont::Get(const char *name, int charHeight) {
if (!fonts)
Init();
cOglFont *font;
for (font = fonts->First(); font; font = fonts->Next(font))
if (!strcmp(font->Name(), name) && charHeight == font->Size()) {
return font;
}
font = new cOglFont(name, charHeight);
fonts->Add(font);
return font;
}
void cOglFont::Init(void) {
if (FT_Init_FreeType(&ftLib)) {
Error("failed to initialize FreeType library!");
return;
}
fonts = new cList<cOglFont>;
initiated = true;
}
void cOglFont::Cleanup(void) {
if (!initiated)
return;
delete fonts;
fonts = 0;
if (ftLib && FT_Done_FreeType(ftLib))
Error("failed to deinitialize FreeType library!");
ftLib = 0;
}
cOglGlyph* cOglFont::Glyph(FT_ULong charCode) const {
// Non-breaking space:
if (charCode == 0xA0)
charCode = 0x20;
// Lookup in cache:
for (cOglGlyph *g = glyphCache.First(); g; g = glyphCache.Next(g)) {
if (g->CharCode() == charCode) {
return g;
}
}
FT_UInt glyph_index = FT_Get_Char_Index(face, charCode);
FT_Int32 loadFlags = FT_LOAD_NO_BITMAP;
// Load glyph image into the slot (erase previous one):
int error = FT_Load_Glyph(face, glyph_index, loadFlags);
if (error) {
Error("FT_Error (0x%02x) : %s", FT_Errors[error].code, FT_Errors[error].message);
return NULL;
}
FT_Glyph ftGlyph;
FT_Stroker stroker;
error = FT_Stroker_New( ftLib, &stroker );
if (error) {
Error("FT_Stroker_New FT_Error (0x%02x) : %s", FT_Errors[error].code, FT_Errors[error].message);
return NULL;
}
float outlineWidth = 0.25f;
FT_Stroker_Set(stroker,
(int)(outlineWidth * 64),
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
error = FT_Get_Glyph(face->glyph, &ftGlyph);
if (error) {
Error("FT_Get_Glyph FT_Error (0x%02x) : %s", FT_Errors[error].code, FT_Errors[error].message);
return NULL;
}
error = FT_Glyph_StrokeBorder( &ftGlyph, stroker, 0, 1 );
if ( error ) {
Error("FT_Glyph_StrokeBorder FT_Error (0x%02x) : %s", FT_Errors[error].code, FT_Errors[error].message);
return NULL;
}
FT_Stroker_Done(stroker);
error = FT_Glyph_To_Bitmap( &ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1);
if (error) {
Error("FT_Glyph_To_Bitmap FT_Error (0x%02x) : %s", FT_Errors[error].code, FT_Errors[error].message);
return NULL;
}
cOglGlyph *Glyph = new cOglGlyph(charCode, (FT_BitmapGlyph)ftGlyph);
glyphCache.Add(Glyph);
FT_Done_Glyph(ftGlyph);
return Glyph;
}
int cOglFont::Kerning(cOglGlyph *glyph, FT_ULong prevSym) const {
int kerning = 0;
if (glyph && prevSym) {
kerning = glyph->GetKerningCache(prevSym);
if (kerning == KERNING_UNKNOWN) {
FT_Vector delta;
FT_UInt glyph_index = FT_Get_Char_Index(face, glyph->CharCode());
FT_UInt glyph_index_prev = FT_Get_Char_Index(face, prevSym);
FT_Get_Kerning(face, glyph_index_prev, glyph_index, FT_KERNING_DEFAULT, &delta);
kerning = delta.x / 64;
glyph->SetKerningCache(prevSym, kerning);
}
}
return kerning;
}
int cOglFont::AtlasKerning(cOglAtlasGlyph *glyph, FT_ULong prevSym) const {
int kerning = 0;
if (glyph && prevSym) {
kerning = glyph->GetKerningCache(prevSym);
if (kerning == KERNING_UNKNOWN) {
FT_Vector delta;
FT_UInt glyph_index = FT_Get_Char_Index(face, glyph->CharCode());
FT_UInt glyph_index_prev = FT_Get_Char_Index(face, prevSym);
FT_Get_Kerning(face, glyph_index_prev, glyph_index, FT_KERNING_DEFAULT, &delta);
kerning = delta.x / 64;
glyph->SetKerningCache(prevSym, kerning);
}
}
return kerning;
}
/****************************************************************************************
* cOglFb
****************************************************************************************/
cOglFb::cOglFb(GLint width, GLint height, GLint viewPortWidth, GLint viewPortHeight) {
initiated = false;
fb = 0;
texture = 0;
this->width = width;
this->height = height;
this->viewPortWidth = viewPortWidth;
this->viewPortHeight = viewPortHeight;
if (width != viewPortWidth || height != viewPortHeight)
scrollable = true;
else
scrollable = false;
}
cOglFb::~cOglFb(void) {
if (texture)
GL_CHECK(glDeleteTextures(1, &texture));
if (fb)
GL_CHECK(glDeleteFramebuffers(1, &fb));
}
bool cOglFb::Init(void) {
initiated = true;
GL_CHECK(glGenTextures(1, &texture));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
GL_CHECK(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
GL_CHECK(glGenFramebuffers(1, &fb));
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fb));
GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0));
GLenum fbstatus;
GL_CHECK(fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
if(fbstatus != GL_FRAMEBUFFER_COMPLETE) {
Error("Framebuffer is not complete!");
return false;
}
return true;
}
void cOglFb::Bind(void) {
if (!initiated)
Init();
GL_CHECK(glViewport(0, 0, width, height));
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fb));
}
void cOglFb::BindRead(void) {
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fb));
}
void cOglFb::BindWrite(void) {
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fb));
}
void cOglFb::Unbind(void) {
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, 0));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, 0));
}
bool cOglFb::BindTexture(void) {
if (!initiated)
return false;
GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
return true;
}
/****************************************************************************************
* cOglOutputFb
****************************************************************************************/
cOglOutputFb::cOglOutputFb(GLint width, GLint height) : cOglFb(width, height, width, height) {
initiated = false;
this->width = width;
this->height = height;
fb = 0;
texture = 0;
}
cOglOutputFb::~cOglOutputFb(void) {
if (texture)
GL_CHECK(glDeleteTextures(1, &texture));
if (fb)
GL_CHECK(glDeleteFramebuffers(1, &fb));
}
bool cOglOutputFb::Init(void) {
initiated = true;
GL_CHECK(glGenTextures(1, &texture));
GL_CHECK(glBindTexture(GL_TEXTURE_2D, texture));
GL_CHECK(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
GL_CHECK(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
GL_CHECK(glGenFramebuffers(1, &fb));
GL_CHECK(glBindFramebuffer(GL_FRAMEBUFFER, fb));
GL_CHECK(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0));
GLenum fbstatus;
GL_CHECK(fbstatus = glCheckFramebufferStatus(GL_FRAMEBUFFER));
if(fbstatus != GL_FRAMEBUFFER_COMPLETE) {
Error("cOglOutputFb: Framebuffer is not complete (%d)!", fbstatus);
return false;
}
return true;
}