/*******************************************************************************
* Function Name : RenderScene
* Returns : true if no error occured
* Description : Main rendering loop function of the program. The shell will
* call this function every frame.
*******************************************************************************/
bool CStrokeStyles::RenderScene()
{
/*
If the left or right arrow keys are pressed then change the
CapStyle or JoinStyle or DashStyle depending on which one is
selected.
*/
if(PVRShellIsKeyPressed(PVRShellKeyNameLEFT))
{
switch(m_i32Selected)
{
case 0: m_i32CapStyle = (m_i32CapStyle + 2) % 3; break;
case 1: m_i32JoinStyle = (m_i32JoinStyle + 2) % 3; break;
case 2: m_i32DashStyle = (m_i32DashStyle + 2) % 3; break;
}
}
if(PVRShellIsKeyPressed(PVRShellKeyNameRIGHT))
{
switch(m_i32Selected)
{
case 0: m_i32CapStyle = (m_i32CapStyle + 1) % 3; break;
case 1: m_i32JoinStyle = (m_i32JoinStyle + 1) % 3; break;
case 2: m_i32DashStyle = (m_i32DashStyle + 1) % 3; break;
}
}
/*
If the up or down arrow is pressed then change which item is
selected.
*/
if(PVRShellIsKeyPressed(PVRShellKeyNameUP))
m_i32Selected = (m_i32Selected + 2) % 3;
if(PVRShellIsKeyPressed(PVRShellKeyNameDOWN))
m_i32Selected = (m_i32Selected + 1) % 3;
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale((float)PVRShellGet(prefWidth), (float)PVRShellGet(prefHeight));
// Clear the screen with clear colour.
vgClear(0, 0, PVRShellGet(prefWidth), PVRShellGet(prefHeight));
// Draw the path with the stroke styles that we want
vgSeti(VG_STROKE_CAP_STYLE , VG_CAP_BUTT + m_i32CapStyle);
vgSeti(VG_STROKE_JOIN_STYLE , VG_JOIN_MITER + m_i32JoinStyle);
vgSetf(VG_STROKE_MITER_LIMIT, m_fMiterLimit * PVRShellGet(prefHeight));
if(m_i32DashStyle > 0)
{
vgSetf(VG_STROKE_DASH_PHASE, m_fDashPhase);
static float s_afDashes[] = { 0.1f, 0.15f, 0.23f, 0.11f };
vgSetfv(VG_STROKE_DASH_PATTERN, 4, s_afDashes);
if(m_i32DashStyle == 2)
m_fDashPhase += 0.01f;
}
else
{
vgSetfv(VG_STROKE_DASH_PATTERN, 0, NULL);
}
vgSetf(VG_STROKE_LINE_WIDTH, 20.0f / PVRShellGet(prefHeight));
vgDrawPath(m_vgPath, VG_STROKE_PATH);
/* Draw the text.
If one of the pieces of text is currently selected then it will be
drawn in yellow.
*/
static char* apszCapStrings[] = { "Butt", "Round", "Square" };
static char* apszJoinStrings[] = { "Miter", "Round", "Bevel" };
static char* apszDashStrings[] = { "None", "Pattern", "Moving" };
m_PrintVG.DisplayDefaultTitle("StrokeStyles", "", ePVRTPrint3DLogoIMG);
float fHeight = PVRShellGet(prefHeight) - 40.0f;
/*
Draw the Cap text.
*/
m_PrintVG.DrawString(2.0f , fHeight, 0.6f, "Cap:", (int) PVRTRGBA(204,204,204,255));
m_PrintVG.DrawShadowString(65.0f, fHeight, 0.6f, apszCapStrings[m_i32CapStyle],
m_i32Selected == 0 ? (int) PVRTRGBA(255,255,0,255) : (int) PVRTRGBA(255,255,255,255));
/*
Draw the Join text.
*/
fHeight -= 20.0f;
m_PrintVG.DrawString(2.0f, fHeight, 0.6f, "Join:", (int) PVRTRGBA(204,204,204,255));
m_PrintVG.DrawShadowString(65.0f, fHeight, 0.6f, apszJoinStrings[m_i32JoinStyle],
m_i32Selected == 1 ? (int) PVRTRGBA(255,255,0,255) : (int) PVRTRGBA(255,255,255,255));
/*
Draw the Dash text.
*/
fHeight -= 20.0f;
m_PrintVG.DrawString(2.0f,fHeight, 0.6f, "Dash:", (int) PVRTRGBA(204,204,204,255));
m_PrintVG.DrawShadowString(65.0f, fHeight, 0.6f, apszDashStrings[m_i32DashStyle],
m_i32Selected == 2 ? (int) PVRTRGBA(255,255,0,255) : (int) PVRTRGBA(255,255,255,255));
return true;
}
