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/*
* Copyright (C) 2005-2008 Team XBMC
* http://www.xbmc.org
*
* 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 2, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "system.h"
#include "GUIFont.h"
#include "GUIFontTTFGL.h"
#include "GUIFontManager.h"
#include "Texture.h"
#include "GraphicContext.h"
#include "gui3d.h"
#include "utils/log.h"
#if HAS_GLES == 2
#include "WindowingFactory.h"
#endif
// stuff for freetype
#ifndef _LINUX
#include "ft2build.h"
#else
#include <ft2build.h>
#endif
#include FT_FREETYPE_H
#include FT_GLYPH_H
#include FT_OUTLINE_H
using namespace std;
#if defined(HAS_GL) || defined(HAS_GLES)
CGUIFontTTFGL::CGUIFontTTFGL(const CStdString& strFileName)
: CGUIFontTTFBase(strFileName)
{
}
CGUIFontTTFGL::~CGUIFontTTFGL(void)
{
}
void CGUIFontTTFGL::Begin()
{
if (m_nestedBeginCount == 0)
{
if (!m_bTextureLoaded)
{
// Have OpenGL generate a texture object handle for us
glGenTextures(1, (GLuint*) &m_nTexture);
// Bind the texture object
glBindTexture(GL_TEXTURE_2D, m_nTexture);
glEnable(GL_TEXTURE_2D);
// Set the texture's stretching properties
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
// Set the texture image -- THIS WORKS, so the pixels must be wrong.
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, m_texture->GetWidth(), m_texture->GetHeight(), 0,
GL_ALPHA, GL_UNSIGNED_BYTE, m_texture->GetPixels());
VerifyGLState();
m_bTextureLoaded = true;
}
// Turn Blending On
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, m_nTexture);
#ifdef HAS_GL
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_COMBINE);
glTexEnvi(GL_TEXTURE_ENV,GL_COMBINE_RGB,GL_REPLACE);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_PRIMARY_COLOR);
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR);
glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE0);
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA);
glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_PRIMARY_COLOR);
glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
VerifyGLState();
#else
g_Windowing.EnableGUIShader(SM_FONTS);
#endif
m_vertex_count = 0;
}
// Keep track of the nested begin/end calls.
m_nestedBeginCount++;
}
void CGUIFontTTFGL::End()
{
if (m_nestedBeginCount == 0)
return;
if (--m_nestedBeginCount > 0)
return;
#ifdef HAS_GL
glPushClientAttrib(GL_CLIENT_VERTEX_ARRAY_BIT);
glColorPointer (4, GL_UNSIGNED_BYTE, sizeof(SVertex), (char*)m_vertex + offsetof(SVertex, r));
glVertexPointer (3, GL_FLOAT , sizeof(SVertex), (char*)m_vertex + offsetof(SVertex, x));
glTexCoordPointer(2, GL_FLOAT , sizeof(SVertex), (char*)m_vertex + offsetof(SVertex, u));
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDrawArrays(GL_QUADS, 0, m_vertex_count);
glPopClientAttrib();
#else
// GLES 2.0 version. Cannot draw quads. Convert to triangles.
GLint posLoc = g_Windowing.GUIShaderGetPos();
GLint colLoc = g_Windowing.GUIShaderGetCol();
GLint tex0Loc = g_Windowing.GUIShaderGetCoord0();
// stack object until VBOs will be used
std::vector<SVertex> vecVertices( 6 * (m_vertex_count / 4) );
SVertex *vertices = &vecVertices[0];
for (int i=0; i<m_vertex_count; i+=4)
{
*vertices++ = m_vertex[i];
*vertices++ = m_vertex[i+1];
*vertices++ = m_vertex[i+2];
*vertices++ = m_vertex[i+1];
*vertices++ = m_vertex[i+3];
*vertices++ = m_vertex[i+2];
}
vertices = &vecVertices[0];
glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, sizeof(SVertex), (char*)vertices + offsetof(SVertex, x));
// Normalize color values. Does not affect Performance at all.
glVertexAttribPointer(colLoc, 4, GL_UNSIGNED_BYTE, GL_TRUE, sizeof(SVertex), (char*)vertices + offsetof(SVertex, r));
glVertexAttribPointer(tex0Loc, 2, GL_FLOAT, GL_FALSE, sizeof(SVertex), (char*)vertices + offsetof(SVertex, u));
glEnableVertexAttribArray(posLoc);
glEnableVertexAttribArray(colLoc);
glEnableVertexAttribArray(tex0Loc);
glDrawArrays(GL_TRIANGLES, 0, vecVertices.size());
glDisableVertexAttribArray(posLoc);
glDisableVertexAttribArray(colLoc);
glDisableVertexAttribArray(tex0Loc);
g_Windowing.DisableGUIShader();
#endif
}
CBaseTexture* CGUIFontTTFGL::ReallocTexture(unsigned int& newHeight)
{
newHeight = CBaseTexture::PadPow2(newHeight);
CBaseTexture* newTexture = new CTexture(m_textureWidth, newHeight, XB_FMT_A8);
if (!newTexture || newTexture->GetPixels() == NULL)
{
CLog::Log(LOGERROR, "GUIFontTTFGL::CacheCharacter: Error creating new cache texture for size %f", m_height);
return NULL;
}
m_textureHeight = newTexture->GetHeight();
m_textureWidth = newTexture->GetWidth();
memset(newTexture->GetPixels(), 0, m_textureHeight * newTexture->GetPitch());
if (m_texture)
{
unsigned char* src = (unsigned char*) m_texture->GetPixels();
unsigned char* dst = (unsigned char*) newTexture->GetPixels();
for (unsigned int y = 0; y < m_texture->GetHeight(); y++)
{
memcpy(dst, src, m_texture->GetPitch());
src += m_texture->GetPitch();
dst += newTexture->GetPitch();
}
delete m_texture;
}
return newTexture;
}
bool CGUIFontTTFGL::CopyCharToTexture(FT_BitmapGlyph bitGlyph, Character* ch)
{
FT_Bitmap bitmap = bitGlyph->bitmap;
unsigned char* source = (unsigned char*) bitmap.buffer;
unsigned char* target = (unsigned char*) m_texture->GetPixels() + (m_posY + ch->offsetY) * m_texture->GetPitch() + m_posX + bitGlyph->left;
for (int y = 0; y < bitmap.rows; y++)
{
memcpy(target, source, bitmap.width);
source += bitmap.width;
target += m_texture->GetPitch();
}
// THE SOURCE VALUES ARE THE SAME IN BOTH SITUATIONS.
// Since we have a new texture, we need to delete the old one
// the Begin(); End(); stuff is handled by whoever called us
if (m_bTextureLoaded)
{
g_graphicsContext.BeginPaint(); //FIXME
DeleteHardwareTexture();
g_graphicsContext.EndPaint();
m_bTextureLoaded = false;
}
return TRUE;
}
void CGUIFontTTFGL::DeleteHardwareTexture()
{
if (m_bTextureLoaded)
{
if (glIsTexture(m_nTexture))
glDeleteTextures(1, (GLuint*) &m_nTexture);
m_bTextureLoaded = false;
}
}
#endif
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