Xash3D FWGS engine.
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/*
vgui_surf.cpp - main vgui layer
Copyright (C) 2011 Uncle Mike
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.
*/
#include "common.h"
#include "client.h"
#include "vgui_draw.h"
#include "vgui_main.h"
#define MAXVERTEXBUFFERS 1024
#define MAX_PAINT_STACK 8
#define FONT_SIZE 512
#define FONT_PAGES 8
static char staticRGBA[FONT_SIZE * FONT_SIZE * 4];
static vpoint_t g_VertexBuffer[MAXVERTEXBUFFERS];
static int g_iVertexBufferEntriesUsed = 0;
static int staticContextCount = 0;
struct FontInfo
{
int id;
int pageCount;
int pageForChar[256];
int bindIndex[FONT_PAGES];
float texCoord[256][FONT_PAGES];
int contextCount;
};
static Font* staticFont = NULL;
static FontInfo* staticFontInfo;
static Dar<FontInfo*> staticFontInfoDar;
static PaintStack paintStack[MAX_PAINT_STACK];
static int staticPaintStackPos = 0;
CEngineSurface :: CEngineSurface( Panel *embeddedPanel ):SurfaceBase( embeddedPanel )
{
_drawTextColor[0] = _drawTextColor[1] = _drawTextColor[2] = _drawTextColor[3] = 255;
_drawColor[0] = _drawColor[1] = _drawColor[2] = _drawColor[3] = 255;
_drawTextPos[0] = _drawTextPos[1] = _currentTexture = 0;
staticFont = NULL;
staticFontInfo = NULL;
staticFontInfoDar.setCount( 0 );
staticPaintStackPos = 0;
staticContextCount++;
VGUI_InitCursors ();
}
CEngineSurface :: ~CEngineSurface( void )
{
VGUI_DrawShutdown ();
}
void CEngineSurface :: setCursor( Cursor *cursor )
{
_currentCursor = cursor;
VGUI_CursorSelect( cursor );
}
void CEngineSurface :: SetupPaintState( const PaintStack *paintState )
{
_translateX = paintState->iTranslateX;
_translateY = paintState->iTranslateY;
SetScissorRect( paintState->iScissorLeft, paintState->iScissorTop, paintState->iScissorRight, paintState->iScissorBottom );
}
void CEngineSurface :: InitVertex( vpoint_t &vertex, int x, int y, float u, float v )
{
vertex.point[0] = x + _translateX;
vertex.point[1] = y + _translateY;
vertex.coord[0] = u;
vertex.coord[1] = v;
}
int CEngineSurface :: createNewTextureID( void )
{
return VGUI_GenerateTexture();
}
void CEngineSurface :: drawSetColor( int r, int g, int b, int a )
{
_drawColor[0] = r;
_drawColor[1] = g;
_drawColor[2] = b;
_drawColor[3] = a;
}
void CEngineSurface :: drawSetTextColor( int r, int g, int b, int a )
{
_drawTextColor[0] = r;
_drawTextColor[1] = g;
_drawTextColor[2] = b;
_drawTextColor[3] = a;
}
void CEngineSurface :: drawFilledRect( int x0, int y0, int x1, int y1 )
{
vpoint_t rect[2];
vpoint_t clippedRect[2];
if( _drawColor[3] >= 255 ) return;
InitVertex( rect[0], x0, y0, 0, 0 );
InitVertex( rect[1], x1, y1, 0, 0 );
// fully clipped?
if( !ClipRect( rect[0], rect[1], &clippedRect[0], &clippedRect[1] ))
return;
VGUI_SetupDrawingRect( _drawColor );
VGUI_EnableTexture( false );
VGUI_DrawQuad( &clippedRect[0], &clippedRect[1] );
VGUI_EnableTexture( true );
}
void CEngineSurface :: drawOutlinedRect( int x0, int y0, int x1, int y1 )
{
if( _drawColor[3] >= 255 ) return;
drawFilledRect( x0, y0, x1, y0 + 1 ); // top
drawFilledRect( x0, y1 - 1, x1, y1 ); // bottom
drawFilledRect( x0, y0 + 1, x0 + 1, y1 - 1 ); // left
drawFilledRect( x1 - 1, y0 + 1, x1, y1 - 1 ); // right
}
void CEngineSurface :: drawSetTextFont( Font *font )
{
staticFont = font;
if( font )
{
bool buildFont = false;
staticFontInfo = NULL;
for( int i = 0; i < staticFontInfoDar.getCount(); i++ )
{
if( staticFontInfoDar[i]->id == font->getId( ))
{
staticFontInfo = staticFontInfoDar[i];
if( staticFontInfo->contextCount != staticContextCount )
buildFont = true;
}
}
if( !staticFontInfo || buildFont )
{
staticFontInfo = new FontInfo;
staticFontInfo->id = 0;
staticFontInfo->pageCount = 0;
staticFontInfo->bindIndex[0] = 0;
staticFontInfo->bindIndex[1] = 0;
staticFontInfo->bindIndex[2] = 0;
staticFontInfo->bindIndex[3] = 0;
memset( staticFontInfo->pageForChar, 0, sizeof( staticFontInfo->pageForChar ));
staticFontInfo->contextCount = -1;
staticFontInfo->id = staticFont->getId();
staticFontInfoDar.putElement( staticFontInfo );
staticFontInfo->contextCount = staticContextCount;
int currentPage = 0;
int x = 0, y = 0;
memset( staticRGBA, 0, sizeof( staticRGBA ));
for( int i = 0; i < 256; i++ )
{
int abcA, abcB, abcC;
staticFont->getCharABCwide( i, abcA, abcB, abcC );
int wide = abcB;
if( isspace( i )) continue;
int tall = staticFont->getTall();
if( x + wide + 1 > FONT_SIZE )
{
x = 0;
y += tall + 1;
}
if( y + tall + 1 > FONT_SIZE )
{
if( !staticFontInfo->bindIndex[currentPage] )
{
int bindIndex = createNewTextureID();
staticFontInfo->bindIndex[currentPage] = bindIndex;
}
drawSetTextureRGBA( staticFontInfo->bindIndex[currentPage], staticRGBA, FONT_SIZE, FONT_SIZE );
currentPage++;
if( currentPage == FONT_PAGES )
break;
memset( staticRGBA, 0, sizeof( staticRGBA ));
x = y = 0;
}
staticFont->getCharRGBA( i, x, y, FONT_SIZE, FONT_SIZE, (byte *)staticRGBA );
staticFontInfo->pageForChar[i] = currentPage;
staticFontInfo->texCoord[i][0] = (float)((double)x / (double)FONT_SIZE );
staticFontInfo->texCoord[i][1] = (float)((double)y / (double)FONT_SIZE );
staticFontInfo->texCoord[i][2] = (float)((double)(x + wide)/(double)FONT_SIZE );
staticFontInfo->texCoord[i][3] = (float)((double)(y + tall)/(double)FONT_SIZE );
x += wide + 1;
}
if( currentPage != FONT_PAGES )
{
if( !staticFontInfo->bindIndex[currentPage] )
{
int bindIndex = createNewTextureID();
staticFontInfo->bindIndex[currentPage] = bindIndex;
}
drawSetTextureRGBA( staticFontInfo->bindIndex[currentPage], staticRGBA, FONT_SIZE, FONT_SIZE );
}
staticFontInfo->pageCount = currentPage + 1;
}
}
}
void CEngineSurface :: drawSetTextPos( int x, int y )
{
_drawTextPos[0] = x;
_drawTextPos[1] = y;
}
void CEngineSurface :: addCharToBuffer( const vpoint_t *ul, const vpoint_t *lr, int color[4] )
{
if( g_iVertexBufferEntriesUsed >= MAXVERTEXBUFFERS )
flushBuffer();
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].coord[0] = ul->coord[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].coord[1] = ul->coord[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].point[0] = ul->point[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].point[1] = ul->point[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].color[0] = color[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].color[1] = color[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].color[2] = color[2];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 0].color[3] = 255 - color[3];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].coord[0] = lr->coord[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].coord[1] = ul->coord[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].point[0] = lr->point[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].point[1] = ul->point[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].color[0] = color[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].color[1] = color[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].color[2] = color[2];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 1].color[3] = 255 - color[3];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].coord[0] = lr->coord[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].coord[1] = lr->coord[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].point[0] = lr->point[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].point[1] = lr->point[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].color[0] = color[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].color[1] = color[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].color[2] = color[2];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 2].color[3] = 255 - color[3];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].coord[0] = ul->coord[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].coord[1] = lr->coord[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].point[0] = ul->point[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].point[1] = lr->point[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].color[0] = color[0];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].color[1] = color[1];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].color[2] = color[2];
g_VertexBuffer[g_iVertexBufferEntriesUsed + 3].color[3] = 255 - color[3];
g_iVertexBufferEntriesUsed += 4;
}
void CEngineSurface :: flushBuffer( void )
{
if( g_iVertexBufferEntriesUsed <= 0 )
return;
VGUI_DrawBuffer( g_VertexBuffer, g_iVertexBufferEntriesUsed );
g_iVertexBufferEntriesUsed = 0;
}
void CEngineSurface :: drawPrintChar( int x, int y, int wide, int tall, float s0, float t0, float s1, float t1, int color[4] )
{
vpoint_t ul, lr;
ul.point[0] = x;
ul.point[1] = y;
lr.point[0] = x + wide;
lr.point[1] = y + tall;
// gets at the texture coords for this character in its texture page
ul.coord[0] = s0;
ul.coord[1] = t0;
lr.coord[0] = s1;
lr.coord[1] = t1;
vpoint_t clippedRect[2];
if( !ClipRect( ul, lr, &clippedRect[0], &clippedRect[1] ))
return;
#if 1
// TESTTEST: needs to be more tested
addCharToBuffer( &clippedRect[0], &clippedRect[1], color );
#else
VGUI_SetupDrawingImage( color );
VGUI_DrawQuad( &clippedRect[0], &clippedRect[1] ); // draw the letter
#endif
}
void CEngineSurface :: drawPrintText( const char *text, int textLen )
{
static bool hasColor = 0;
static int numColor = 7;
if( !text || !staticFont || !staticFontInfo )
return;
int x = _drawTextPos[0] + _translateX;
int y = _drawTextPos[1] + _translateY;
int tall = staticFont->getTall();
int curTextColor[4];
// HACKHACK: allow color strings in VGUI
if( numColor != 7 && vgui_colorstrings->value )
{
for( int j = 0; j < 3; j++ ) // grab predefined color
curTextColor[j] = g_color_table[numColor][j];
}
else
{
for( int j = 0; j < 3; j++ ) // revert default color
curTextColor[j] = _drawTextColor[j];
}
curTextColor[3] = _drawTextColor[3]; // copy alpha
if( textLen == 1 && vgui_colorstrings->value )
{
if( *text == '^' )
{
hasColor = true;
return; // skip '^'
}
else if( hasColor && isdigit( *text ))
{
numColor = ColorIndex( *text );
hasColor = false; // handled
return; // skip colornum
}
else hasColor = false;
}
for( int i = 0; i < textLen; i++ )
{
int abcA, abcB, abcC;
int curCh = (byte)text[i];
staticFont->getCharABCwide( curCh, abcA, abcB, abcC );
float s0 = staticFontInfo->texCoord[curCh][0];
float t0 = staticFontInfo->texCoord[curCh][1];
float s1 = staticFontInfo->texCoord[curCh][2];
float t1 = staticFontInfo->texCoord[curCh][3];
int wide = abcB;
drawSetTexture( staticFontInfo->bindIndex[staticFontInfo->pageForChar[curCh]] );
drawPrintChar( x, y, wide, tall, s0, t0, s1, t1, curTextColor );
x += abcA + abcB + abcC;
}
_drawTextPos[0] += x;
}
void CEngineSurface :: drawSetTextureRGBA( int id, const char* rgba, int wide, int tall )
{
VGUI_UploadTexture( id, rgba, wide, tall );
_currentTexture = id;
}
void CEngineSurface :: drawSetTexture( int id )
{
if( _currentTexture != id )
{
_currentTexture = id;
flushBuffer();
}
VGUI_BindTexture( id );
}
void CEngineSurface :: drawTexturedRect( int x0, int y0, int x1, int y1 )
{
vpoint_t rect[2];
vpoint_t clippedRect[2];
InitVertex( rect[0], x0, y0, 0, 0 );
InitVertex( rect[1], x1, y1, 1, 1 );
// fully clipped?
if( !ClipRect( rect[0], rect[1], &clippedRect[0], &clippedRect[1] ))
return;
VGUI_SetupDrawingImage( _drawColor );
VGUI_DrawQuad( &clippedRect[0], &clippedRect[1] );
}
void CEngineSurface :: pushMakeCurrent( Panel* panel, bool useInsets )
{
int insets[4] = { 0, 0, 0, 0 };
int absExtents[4];
int clipRect[4];
if( useInsets )
panel->getInset( insets[0], insets[1], insets[2], insets[3] );
panel->getAbsExtents( absExtents[0], absExtents[1], absExtents[2], absExtents[3] );
panel->getClipRect( clipRect[0], clipRect[1], clipRect[2], clipRect[3] );
PaintStack *paintState = &paintStack[staticPaintStackPos];
ASSERT( staticPaintStackPos < MAX_PAINT_STACK );
paintState->m_pPanel = panel;
// determine corrected top left origin
paintState->iTranslateX = insets[0] + absExtents[0];
paintState->iTranslateY = insets[1] + absExtents[1];
// setup clipping rectangle for scissoring
paintState->iScissorLeft = clipRect[0];
paintState->iScissorTop = clipRect[1];
paintState->iScissorRight = clipRect[2];
paintState->iScissorBottom = clipRect[3];
SetupPaintState( paintState );
staticPaintStackPos++;
}
void CEngineSurface :: popMakeCurrent( Panel *panel )
{
flushBuffer();
int top = staticPaintStackPos - 1;
// more pops that pushes?
Assert( top >= 0 );
// didn't pop in reverse order of push?
Assert( paintStack[top].m_pPanel == panel );
staticPaintStackPos--;
if( top > 0 ) SetupPaintState( &paintStack[top-1] );
}