/*******************************************************************************
* 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 CImage::RenderScene()
{
//Clear the screen with the current clear colour.
vgClear(0, 0, PVRShellGet(prefWidth), PVRShellGet(prefHeight));
//Change the matrix mode to VG_MATRIX_IMAGE_USER_TO_SURFACE so we can transform the images
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
//Set the current matrix to the identity
vgLoadIdentity();
//Translate the image to the desired position
vgTranslate(PVRShellGet(prefWidth) * 0.5f - (IMG_SIZE * 0.5f), PVRShellGet(prefHeight)* 0.5f + 5);
//Draw the first image
vgDrawImage(m_avgImage[0]);
//Reset the current matrix...
vgLoadIdentity();
//...Perform a translation to position the second image...
vgTranslate(PVRShellGet(prefWidth) * 0.5f - (IMG_SIZE * 0.5f), PVRShellGet(prefHeight)* 0.5f - IMG_SIZE - 5);
//...and draw
vgDrawImage(m_avgImage[1]);
m_PrintVG.DisplayDefaultTitle("Image", "", ePVRTPrint3DLogoIMG);
return true;
}
/*******************************************************************************
* 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 COVGIntroducingSVG::RenderScene()
{
// Clear surface
vgClear(0, 0, m_i32WindowWidth, m_i32WindowHeight);
// Draw the SVGobject
m_SVGObject.Draw();
// Display the title and logo.
m_PrintVG.DisplayDefaultTitle("IntroducingSVG", "", ePVRTPrint3DSDKLogo);
return true;
}
/*******************************************************************************
* 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 OVGMaskLayer::RenderScene()
{
//Clear the screen with the current clear colour
vgClear(0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Set the paint and draw the path
vgSetPaint(m_avgColourPaint[1], VG_FILL_PATH);
vgDrawPath(m_avgPath[0], VG_STROKE_PATH | VG_FILL_PATH);
//Enable masking
vgSeti(VG_MASKING, VG_TRUE);
// Set paint
vgSetPaint(m_avgColourPaint[2], VG_FILL_PATH);
/*
Modify the drawing surface's mask layer by loading it with the values from our first mask layer.
See OVGMasking for more details on vgMask.
*/
vgMask(m_vgMaskLayer[0], VG_SET_MASK, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Draw our path
vgDrawPath(m_avgPath[1], VG_STROKE_PATH | VG_FILL_PATH);
// Load the second mask layer into the mask
vgMask(m_vgMaskLayer[1], VG_SET_MASK, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Draw our path
vgDrawPath(m_avgPath[2], VG_STROKE_PATH | VG_FILL_PATH);
// Change paint for the triangle
vgSetPaint(m_avgColourPaint[0], VG_FILL_PATH);
// Merge our first mask layer into the mask (that currently contains the data from our second layer)
vgMask(m_vgMaskLayer[0], VG_INTERSECT_MASK, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Draw our path
vgDrawPath(m_avgPath[3], VG_STROKE_PATH | VG_FILL_PATH);
// Disable masking
vgSeti(VG_MASKING, VG_FALSE);
// Draw title and logo
m_PrintVG.DisplayDefaultTitle("MaskLayer", "", ePVRTPrint3DSDKLogo);
return true;
}
/*******************************************************************************
* 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 CChildImage::RenderScene()
{
//Clear the screen with the current clear color.
vgClear(0, 0, PVRShellGet(prefWidth), PVRShellGet(prefHeight));
//Change the matrix mode to VG_MATRIX_IMAGE_USER_TO_SURFACE so we can transform the images
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
//Set the current matrix to the identiy
vgLoadIdentity();
//Translate the image to the desired position
vgTranslate(PVRShellGet(prefWidth) * 0.5f - (IMG_SIZE * 0.5f), PVRShellGet(prefHeight)* 0.5f + 5.0f);
//Draw the main image
vgDrawImage(m_vgImage);
//Reset the current matrix...
vgLoadIdentity();
//...Perform a translation to position the first child image...
int i32Height = vgGetParameteri(m_avgChildImages[0], VG_IMAGE_HEIGHT);
vgTranslate(PVRShellGet(prefWidth) * 0.5f - (vgGetParameteri(m_avgChildImages[1], VG_IMAGE_WIDTH) * 0.5f), PVRShellGet(prefHeight)* 0.5f - i32Height - 5.0f);
//...and draw
vgDrawImage(m_avgChildImages[0]);
//Reset the current matrix...
vgLoadIdentity();
//...Perform a translation to position the second child image...
i32Height = vgGetParameteri(m_avgChildImages[0], VG_IMAGE_HEIGHT) + vgGetParameteri(m_avgChildImages[1], VG_IMAGE_HEIGHT);
vgTranslate(PVRShellGet(prefWidth) * 0.5f - (vgGetParameteri(m_avgChildImages[1], VG_IMAGE_WIDTH) * 0.5f), PVRShellGet(prefHeight)* 0.5f - i32Height - 10.0f);
//...and draw
vgDrawImage(m_avgChildImages[1]);
m_PrintVG.DisplayDefaultTitle("ChildImage", "", ePVRTPrint3DLogoIMG);
return true;
}
/*******************************************************************************
* 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 CTransforms::RenderScene()
{
m_ui32AbsTime = PVRShellGetTime();
// Clear the screen with clear color.
vgClear(0, 0, PVRShellGet(prefWidth), PVRShellGet(prefHeight));
// Set fill paint
vgSetPaint(m_vgPaint, VG_FILL_PATH);
unsigned int ui32TimeSinceStart = PVRShellGetTime() - m_ui32StartTime;
// toggle segment type every 3 seconds
int ui32ActiveTransform = (ui32TimeSinceStart % (3000 * 7)) / 3000;
switch(ui32ActiveTransform)
{
case 0: DoTranslate(); break;
case 1: DoScaleCentered(); break;
case 2: DoScaleOrigin(); break;
case 3: DoRotateCentered(); break;
case 4: DoRotateOrigin(); break;
case 5: DoShearCentered(); break;
case 6: DoShearOrigin(); break;
}
// Draw user interface
static char* apszTransforms[] = {
"Translation",
"Scaling (centered on object)",
"Scaling (from origin)",
"Rotate (centered on object)",
"Rotate (around origin)",
"Shear (centered on object)",
"Shear (from origin)",
};
m_PrintVG.DisplayDefaultTitle("Transforms", apszTransforms[ui32ActiveTransform], ePVRTPrint3DLogoIMG);
return true;
}
/*******************************************************************************
* 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;
}
/*******************************************************************************
* 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 OVGFont::RenderScene()
{
// Clear the screen
vgClear(0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Set the current fill paint...
vgSetPaint(m_vgFontPaint, VG_FILL_PATH);
/*
Set the matrix mode to GLYPH_USER_TO_SURFACE as we want to
translate and scale the glyphs.
*/
vgSeti(VG_MATRIX_MODE, VG_MATRIX_GLYPH_USER_TO_SURFACE);
/*
Set the string. The vgDrawGlyphs function used and
explained in DrawLine excepts an array of unsiged
ints for an array of glyph IDs which is why we are
not defining a char array.
An alternative to vgDrawGlyphs is vgDrawGlyph that
can be used to display 1 glyph at a time.
*/
static VGuint str[] = {'T','e','x','t','y', '!',' '};
/*
The DrawLine function repeats the string until the
line has covered the width of the screen.
*/
// Draw the string with the path based font at 4 different scales
DrawLine(m_vgPathFont, 7, &str[0], m_ui32ScreenHeight * 0.75f, 2.0f);
DrawLine(m_vgPathFont, 7, &str[0], m_ui32ScreenHeight * 0.65f, 1.0f);
DrawLine(m_vgPathFont, 7, &str[0], m_ui32ScreenHeight * 0.60f, 0.5f);
DrawLine(m_vgPathFont, 7, &str[0], m_ui32ScreenHeight * 0.55f, 0.25f);
/*
Set the blend mode for the image based glyphs
*/
vgSeti(VG_BLEND_MODE, VG_BLEND_SRC_OVER);
/*
Set the image mode to DRAW_IMAGE_MULTIPLY so the image based glyphs
are multiplied by the paint colour and alpha values.
*/
vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_MULTIPLY);
// Draw the string with the image based font at 4 different scales.
DrawLine(m_vgImageFont, 7, &str[0], m_ui32ScreenHeight * 0.35f, 2.0f);
DrawLine(m_vgImageFont, 7, &str[0], m_ui32ScreenHeight * 0.25f, 1.0f);
DrawLine(m_vgImageFont, 7, &str[0], m_ui32ScreenHeight * 0.20f, 0.5f);
DrawLine(m_vgImageFont, 7, &str[0], m_ui32ScreenHeight * 0.15f, 0.25f);
// Disable blending
vgSeti(VG_BLEND_MODE, VG_BLEND_SRC);
// Display the title and logo.
m_PrintVG.DisplayDefaultTitle("Font", "", ePVRTPrint3DSDKLogo);
return true;
}
