/*******************************************************************************
* Function Name : DoScaleOrigin
* Description : Demonstrate the effect of scaling from the origin.
*******************************************************************************/
void CTransforms::DoScaleOrigin()
{
// Make sure we're operating on the path user-to-surface matrix
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
// Load Identity matrix. This clears all previous transformations
vgLoadIdentity();
// To be independent of screen resolution, we need to scale the
// coordinates so everything in the range [0, 1] will be visible
vgScale((float) PVRShellGet(prefWidth), (float) PVRShellGet(prefHeight));
// turn time(ms) into a periodic triangle function
int i32Zigzag = m_ui32AbsTime % 2000;
if(i32Zigzag > 1000)
i32Zigzag = 2000 - i32Zigzag;
i32Zigzag = PVRT_MAX(100, PVRT_MIN(900, i32Zigzag));
float fScaleFactor = 0.3f + (i32Zigzag * 0.0009f);
// Scaling a scene from the origin means that objects will
// either get pulled towards the origin or move away from it
// along with being resized.
vgScale(fScaleFactor, fScaleFactor);
// draw first path
vgDrawPath(m_avgPaths[0], VG_STROKE_PATH | VG_FILL_PATH);
// draw second path
vgDrawPath(m_avgPaths[1], VG_STROKE_PATH | VG_FILL_PATH);
}
void display(float interval)
{
VGfloat cc[] = {0,0,0,1};
vgSetfv(VG_CLEAR_COLOR, 4, cc);
vgClear(0,0,testWidth(),testHeight());
vgSeti(VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER);
vgLoadIdentity();
vgTranslate(tx, ty);
vgScale(sx, sy);
vgRotate(a);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_MULTIPLY);
vgLoadIdentity();
vgSetPaint(patternFill, VG_FILL_PATH);
/*vgDrawPath(p, VG_FILL_PATH);*/
vgDrawImage(backImage);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgTranslate(tx, ty);
vgScale(sx, sy);
vgRotate(a);
vgSetPaint(blackFill, VG_FILL_PATH | VG_STROKE_PATH);
vgDrawPath(org, VG_FILL_PATH);
}
void display(float interval)
{
VGfloat cc[] = {0,0,0,1};
vgSetfv(VG_CLEAR_COLOR, 4, cc);
vgClear(0,0,testWidth(),testHeight());
vgSeti(VG_MATRIX_MODE, VG_MATRIX_FILL_PAINT_TO_USER);
vgLoadIdentity();
vgTranslate(tx, ty);
vgRotate(ang);
vgScale(sx, sy);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgSetPaint(radialFill, VG_FILL_PATH);
vgDrawPath(p, VG_FILL_PATH);
vgTranslate(tx, ty);
vgRotate(ang);
vgScale(sx, sy);
vgSetPaint(blackFill, VG_FILL_PATH | VG_STROKE_PATH);
vgDrawPath(radius, VG_STROKE_PATH);
vgDrawPath(center, VG_STROKE_PATH);
vgDrawPath(focus, VG_FILL_PATH);
}
/*******************************************************************************
* Function Name : DoScaleCentered
* Description : Demonstrate the effect of scaling from the centre of a
* shape. Each path is transformed separately.
*******************************************************************************/
void CTransforms::DoScaleCentered()
{
// Make sure we're operating on the path user-to-surface matrix
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
// Load Identity matrix. This clears all previous transformations
vgLoadIdentity();
// To be independent of screen resolution, we need to scale the
// coordinates so everything in the range [0, 1] will be visible
vgScale((float) PVRShellGet(prefWidth), (float) PVRShellGet(prefHeight));
// Unlike OpenGL, OpenVG does not maintain a matrix stack. So instead of
// pushing the current matrix to the stack, we have to store it ourselves
float afUnitMatrix[3*3];
vgGetMatrix(afUnitMatrix);
// turn time(ms) into a periodic triangle function
int i32Zigzag = m_ui32AbsTime % 2000;
if(i32Zigzag > 1000)
i32Zigzag = 2000 - i32Zigzag;
float fScaleFactor = 0.5f + (i32Zigzag * 0.001f);
// Scaling a shape from its center is identical to moving it to the
// origin, scaling it there, and moving it back where it was.
//
// IMPORTANT:
// Since OpenVG right-multiplies matrices, you conceptually need to
// call the transformation functions in backwards order.
vgTranslate(0.5f, 0.75f);
vgScale(fScaleFactor, fScaleFactor);
vgTranslate(-0.5f, -0.75f);
// draw first path
vgDrawPath(m_avgPaths[0], VG_STROKE_PATH | VG_FILL_PATH);
// restore the unit matrix ([0, 1] visible)
vgLoadMatrix(afUnitMatrix);
// transformation for second path
fScaleFactor = 2 - fScaleFactor;
vgTranslate(0.5f, 0.25f);
vgScale(fScaleFactor, fScaleFactor);
vgTranslate(-0.5f, -0.25f);
// draw second path
vgDrawPath(m_avgPaths[1], VG_STROKE_PATH | VG_FILL_PATH);
}
void render(int w, int h)
{
{
float clearColor[4] = {1,1,1,1};
float scale = w / (tigerMaxX - tigerMinX);
eglSwapBuffers(egldisplay, eglsurface); //force EGL to recognize resize
vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
vgClear(0, 0, w, h);
vgLoadIdentity();
vgTranslate(w * 0.5f, h * 0.5f);
vgRotate(rotateN);
vgTranslate(-w * 0.5f, -h * 0.5f);
vgScale(scale, scale);
vgTranslate(-tigerMinX, -tigerMinY + 0.5f * (h / scale - (tigerMaxY - tigerMinY)));
PS_render(tiger);
assert(vgGetError() == VG_NO_ERROR);
renderWidth = w;
renderHeight = h;
}
}
void loadTiger()
{
int i;
VGPath temp;
temp = testCreatePath();
tigerPaths = (VGPath*)malloc(pathCount * sizeof(VGPath));
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgTranslate(-100,100);
vgScale(1,-1);
for (i=0; i<pathCount; ++i) {
vgClearPath(temp, VG_PATH_CAPABILITY_ALL);
vgAppendPathData(temp, commandCounts[i],
commandArrays[i], dataArrays[i]);
tigerPaths[i] = testCreatePath();
vgTransformPath(tigerPaths[i], temp);
}
tigerStroke = vgCreatePaint();
tigerFill = vgCreatePaint();
vgSetPaint(tigerStroke, VG_STROKE_PATH);
vgSetPaint(tigerFill, VG_FILL_PATH);
vgLoadIdentity();
vgDestroyPath(temp);
}
//Display functions
void display(float interval)
{
int i;
const VGfloat *style;
VGfloat clearColor[] = {1,1,1,1};
if (animate) {
ang += interval * 360 * 0.1f;
if (ang > 360) ang -= 360;
}
vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
vgClear(0,0,testWidth(),testHeight());
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgTranslate(testWidth()/2 + tx,testHeight()/2 + ty);
vgScale(sx, sy);
vgRotate(ang);
for (i=0; i<pathCount; ++i) {
style = styleArrays[i];
vgSetParameterfv(tigerStroke, VG_PAINT_COLOR, 4, &style[0]);
vgSetParameterfv(tigerFill, VG_PAINT_COLOR, 4, &style[4]);
vgSetf(VG_STROKE_LINE_WIDTH, style[8]);
vgDrawPath(tigerPaths[i], (VGint)style[9]); // Bingo!!, Draw it!!
}
vgFlush();
}
/*******************************************************************************
* Function Name : DoShearOrigin
* Description : Demonstrate the effect of shearing from the origin.
*******************************************************************************/
void CTransforms::DoShearOrigin()
{
// Make sure we're operating on the path user-to-surface matrix
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
// Load Identity matrix. This clears all previous transformations
vgLoadIdentity();
// To be independent of screen resolution, we need to scale the
// coordinates so everything in the range [0, 1] will be visible
vgScale((float)PVRShellGet(prefWidth), (float)PVRShellGet(prefHeight));
// turn time(ms) into a periodic triangle function
int i32Zigzag = m_ui32AbsTime % 2000;
if(i32Zigzag > 1000)
i32Zigzag = 2000 - i32Zigzag;
i32Zigzag = PVRT_MAX(100, PVRT_MIN(900, i32Zigzag)) - 500;
vgShear(i32Zigzag * 0.001f, 0);
// draw first path
vgDrawPath(m_avgPaths[0], VG_STROKE_PATH | VG_FILL_PATH);
// draw second path
vgDrawPath(m_avgPaths[1], VG_STROKE_PATH | VG_FILL_PATH);
}
void OVGFont::DrawLine(VGFont &vgFont, VGint i32Size, VGuint *pStr, float fHeight, float fScale)
{
static float fOrigin[] = {0.0f, 0.0f};
/*
Everytime vgDrawGlyph(s) is called the glyph(s) are drawn at the position
defined by VG_GLYPH_ORIGIN. This value is updated after each call by the
escapement vector defined by the glyph.
As we don't want our text to follow any of the text previously drawn we're
setting the glyph orign to 0,0.
*/
vgSetfv(VG_GLYPH_ORIGIN, 2, fOrigin);
/*
Using the matrix mode MATRIX_GLYPH_USER_TO_SURFACE translate and scale
the font.
*/
vgLoadIdentity();
vgTranslate(0.0f, fHeight);
vgScale(fScale, fScale);
/*
Our string is only a few glyphs long so we're going to repeatedly
draw it until the x value of the GLYPH_ORIGIN is greater than the
scaled width.
*/
float fGlyphOrigin[2];
fGlyphOrigin[0] = 0.0f;
fGlyphOrigin[1] = 0.0f;
float fScaledWidth = m_ui32ScreenWidth / fScale;
while(fGlyphOrigin[0] < fScaledWidth)
{
/*
Draw i32Size no of glyphs from pStr. The VG_FILL_PATH parameter
defines how you would like the glyph (if a path) to be displayed.
You can also have it stroked by using VG_STROKE_PATH. This parameter
doesn't affect image based glyphs unless it's value is set to 0
in which case no glyph (path or image based) will be drawn.
The fourth and fifth parameters are the x and y adjustments
for each glyph. These can be set to adjust the position of the glyphs
drawn or can be set to NULL.
The final parameter (set to VG_TRUE) disables or enables autohinting.
If equal to true autohinting may be applied to alter the glyphs slightly
to improve the render quality.
*/
vgDrawGlyphs(vgFont, i32Size, &pStr[0], NULL,NULL, VG_FILL_PATH, VG_TRUE);
// Get the updated GLYPH_ORIGIN
vgGetfv(VG_GLYPH_ORIGIN, 2, &fGlyphOrigin[0]);
}
}
// C function:: void vgScale(VGfloat sx, VGfloat sy);
JNIEXPORT jint JNICALL
Java_com_example_startvg_VG11_vgScale(
JNIEnv* env, jobject obj,
jfloat sx, jfloat sy){
vgScale(
(VGfloat) sx,
(VGfloat) sy
);
}
/****************************************************************************
** InitView() is called by PVRShell each time a rendering variable is changed
** in the Shell menu (Z-Buffer On/Off, resolution change, buffering mode...)
** In this function one should initialise all variables that are dependant on
** general rendering variables (screen mode, 3D device, etc...)
****************************************************************************/
bool CIntroducingPVRShell::InitView()
{
/*
Initially, the OpenVG coordinate system is based on the output resolution.
To get a device independent coordinate system, we need to apply a
transformation. Scaling by the output resolution means that coordinates
between (0, 0) and (1, 1) will be visible on screen.
It should be noted, however, that different aspect ratios usually require
special attention regarding the layout of elements on screen.
*/
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale((float)PVRShellGet(prefWidth), (float)PVRShellGet(prefHeight));
/*
Drawing shapes with OpenVG requires a path which represents a series of
line and curve segments describing the outline of the shape. The shape
does not need to be closed, but for now we will start with a simple
triangle.
First we create a path object, then we append segment and point data.
*/
m_vgPath = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
1.0f, 0.0f, 4, 3, (unsigned int)VG_PATH_CAPABILITY_ALL);
VGubyte aui8PathSegments[4] = {
VG_MOVE_TO_ABS,
VG_LINE_TO_ABS,
VG_LINE_TO_ABS,
VG_CLOSE_PATH,
};
VGfloat afPoints[6] = {
0.3f, 0.3f,
0.7f, 0.3f,
0.5f, 0.7f,
};
vgAppendPathData(m_vgPath, 4, aui8PathSegments, afPoints);
/*
To fill a shape, we need a paint that describes how to fill it: a gradient,
pattern, or single colour. Here we choose a simple opaque red.
*/
m_vgFillPaint = vgCreatePaint();
vgSetParameteri(m_vgFillPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(m_vgFillPaint, PVRTRGBA(255,255,170,255));
/*
The clear colour will be used whenever calling vgClear(). The colour is given
as non-premultiplied sRGBA.
*/
VGfloat afClearColour[] = { 0.6f, 0.8f, 1.0f, 1.0f };
vgSetfv(VG_CLEAR_COLOR, 4, afClearColour);
return true;
}
/*!***************************************************************************
@Function SetupScaleToSize
@Input fTargetWidth Target width to scale to
@Input fTargetHeight Target height to scale to
@Input bKeepAspect Maintain the aspect ratio
@Description Function used to fit the artwork on the screen.
*****************************************************************************/
void CPVRTPVGObject::SetupScaleToSize(float fTargetWidth, float fTargetHeight, bool bKeepAspect)
{
float fScaleH = fTargetWidth / m_fWidth;
float fScaleV = fTargetHeight / m_fHeight;
if(bKeepAspect)
{
fScaleH = fabs(fScaleH) < fabs(fScaleV) ? fScaleH : fScaleV;
fScaleV = fScaleH;
}
vgScale(fScaleH, fScaleV);
}
int render(int width, int height)
{
static DWORD startTick =0;
static DWORD frames = 0;
VGImage image;
char buf[256];
if((startTick == 0)||(frames > 50))
{
if(frames > 50)
frames = 0;
startTick = GetTickCount();
frames++;
}
else
{
sprintf(buf, "fps:%2.2f frames/sec \n", (float)(frames++)*1000/(GetTickCount() - startTick));
OutputDebugString(buf);
}
if(pReadFile == NULL)
{
pReadFile = fopen("test.rgb","rb");
if(pReadFile)
fseek(pReadFile, 0 , SEEK_SET);
}
if(pReadFile && (feof(pReadFile)))
fseek(pReadFile, 0 , SEEK_SET);
if(pReadFile)
fread(pBuff, sizeof(BYTE),SRC_WIDTH*SRC_HEIGHT*2,pReadFile);
image = vgCreateImage( VG_sRGB_565, SRC_WIDTH, SRC_HEIGHT, VG_IMAGE_QUALITY_BETTER );
if(image == NULL)
return -1;
vgImageSubData( image, pBuff, SRC_WIDTH*2, VG_sRGB_565, 0, 0, SRC_WIDTH, SRC_HEIGHT);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
vgLoadIdentity();
vgScale((VGfloat)width/SRC_WIDTH, (VGfloat)height/SRC_HEIGHT);
vgTranslate(SRC_WIDTH, SRC_HEIGHT);
vgRotate(180.0f);
vgDrawImage( image );
vgDestroyImage( image );
if ( vgGetError() == VG_NO_ERROR )
eglSwapBuffers( egldisplay, eglsurface );
return 0;
}
/*******************************************************************************
* Function Name : DoTranslate
* Description : Demonstrate the effect of translations. Each path is
* translated separately
*******************************************************************************/
void CTransforms::DoTranslate()
{
// Make sure we're operating on the path user-to-surface matrix
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
// Load Identity matrix. This clears all previous transformations
vgLoadIdentity();
// To be independent of screen resolution, we need to scale the
// coordinates so everything in the range [0, 1] will be visible
vgScale((float) PVRShellGet(prefWidth), (float) PVRShellGet(prefHeight));
// Unlike OpenGL, OpenVG does not maintain a matrix stack. So instead of
// pushing the current matrix to the stack, we have to store it ourselves
float afUnitMatrix[3 * 3];
vgGetMatrix(afUnitMatrix);
// turn time(ms) into a clipped periodic triangle function
int i32Zigzag1 = m_ui32AbsTime % 2000;
if(i32Zigzag1 > 1000)
i32Zigzag1 = 2000 - i32Zigzag1;
i32Zigzag1 = PVRT_MAX(250, PVRT_MIN(750, i32Zigzag1)) - 500;
// and again, now with shifted phase
int i32Zigzag2 = (m_ui32AbsTime + 500) % 2000;
if(i32Zigzag2 > 1000)
i32Zigzag2 = 2000 - i32Zigzag2;
i32Zigzag2 = PVRT_MAX(250, PVRT_MIN(750, i32Zigzag2)) - 250;
// translation for first path
vgTranslate(-0.001f * i32Zigzag1, -0.001f * i32Zigzag2);
// draw first path
vgDrawPath(m_avgPaths[0], VG_STROKE_PATH | VG_FILL_PATH);
// restore the unit matrix ([0, 1] visible)
vgLoadMatrix(afUnitMatrix);
// translation for second path
vgTranslate(0.001f * i32Zigzag1, 0.001f * i32Zigzag2);
// draw second path
vgDrawPath(m_avgPaths[1], VG_STROKE_PATH | VG_FILL_PATH);
}
void CTSmallWindowOpenVG::RenderL()
{
CTWindow::RenderL();
// Make sure that this egl status is active
eglMakeCurrent(iDisplay, iSurface, iSurface, iContextVG);
VGfloat clearColor[4] = {0.1f, 0.2f, 0.4f, 1.f};
VGfloat scaleFactor = Size().iWidth/200.f;
if (Size().iHeight/200.f < scaleFactor)
{
scaleFactor = Size().iHeight/200.f;
}
iCurrentRotation = iTime;
if (iCurrentRotation >= 360.f)
{
iCurrentRotation -= 360.f;
}
vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
vgClear(0, 0, Size().iWidth, Size().iHeight);
vgLoadIdentity();
vgTranslate((float)Size().iHeight / 2, (float)Size().iHeight / 2);
vgScale(scaleFactor, scaleFactor);
vgRotate(iCurrentRotation);
vgTranslate(-50.f, -50.f);
vgSeti(VG_BLEND_MODE, VG_BLEND_SRC_OVER);
vgSeti(VG_FILL_RULE, VG_EVEN_ODD);
vgSetPaint(iFillPaint, VG_FILL_PATH);
vgSetf(VG_STROKE_LINE_WIDTH, 10.f);
vgSeti(VG_STROKE_CAP_STYLE, VG_CAP_ROUND);
vgSeti(VG_STROKE_JOIN_STYLE, VG_JOIN_ROUND);
vgSetf(VG_STROKE_MITER_LIMIT, 0.f);
vgSetPaint(iStrokePaint, VG_STROKE_PATH);
vgDrawPath(iPath, VG_FILL_PATH | VG_STROKE_PATH);
iTime++;
eglSwapBuffers(iDisplay, iSurface);
}
static void
draw(void)
{
VGPath line;
VGPaint fillPaint;
VGubyte lineCommands[3] = {VG_MOVE_TO_ABS, VG_LINE_TO_ABS, VG_LINE_TO_ABS};
VGfloat lineCoords[] = {-2.0f,-1.0f, 0.0f,0.0f, -1.0f, -2.0f};
VGfloat clearColor[] = {0.0f, 0.0f, 0.0f, 1.0f};/* black color */
VGfloat fillColor[] = {1.0f, 1.0f, 1.0f, 1.0f};/* white color */
//VGfloat testRadius = 60.0f;
VGfloat testRadius = 10.0f;
int WINDSIZEX = window_width();
int WINDSIZEY = window_height();
line = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F,
1.0f, 0.0f, 0, 0, VG_PATH_CAPABILITY_ALL);
fillPaint = vgCreatePaint();
vgSetf(VG_STROKE_LINE_WIDTH, 1.0f);
//vgSeti(VG_STROKE_CAP_STYLE, VG_CAP_ROUND);
vgSeti(VG_STROKE_CAP_STYLE, VG_CAP_BUTT);
vgSeti(VG_STROKE_JOIN_STYLE, VG_JOIN_ROUND);
//vgSeti(VG_STROKE_JOIN_STYLE, VG_JOIN_BEVEL);
vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_BETTER);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgTranslate(60, 60);
vgScale(testRadius * 2, testRadius * 2);
vgAppendPathData(line, 3, lineCommands, lineCoords);
vgSetfv(VG_CLEAR_COLOR, 4, clearColor);
vgSetPaint(fillPaint, VG_STROKE_PATH);
vgSetParameterfv(fillPaint, VG_PAINT_COLOR, 4, fillColor);
vgSetParameteri( fillPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgClear(0, 0, WINDSIZEX, WINDSIZEY);
vgDrawPath(line, VG_STROKE_PATH);
vgDestroyPath(line);
vgDestroyPaint(fillPaint);
}
void display(float interval)
{
VGfloat cc[] = {0,0,0,1};
angle += interval * 0.4 * PI;
if (angle > 2*PI) angle -= 2*PI;
amount = (sin(angle) + 1) * 0.5f;
createMorph();
vgSetfv(VG_CLEAR_COLOR, 4, cc);
vgClear(0,0,testWidth(),testHeight());
vgLoadIdentity();
vgTranslate(testWidth()/2, testHeight()/2);
vgScale(1.5, 1.5);
vgDrawPath(iMorph, VG_FILL_PATH);
}
static void draw(EGLmanager *eglman)
{
VGfloat black[] = {0.f, 0.f, 0.f, 1.f};
// Render 3D scene by GL
eglBindAPI(EGL_OPENGL_ES_API);
eglMakeCurrent(eglman->dpy, eglman->pbuf_surface, eglman->pbuf_surface, eglman->es_ctx);
// Modify GL texture source
glClearColor(1.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TEXTURE_WIDTH/2, TEXTURE_HEIGHT/2);
glClearColor(0.0, 1.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, TEXTURE_WIDTH/2, 0, 0, 0, TEXTURE_WIDTH/2, TEXTURE_HEIGHT/2);
glClearColor(0.0, 0.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, TEXTURE_HEIGHT/2, 0, 0, TEXTURE_WIDTH/2, TEXTURE_HEIGHT/2);
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, TEXTURE_WIDTH/2, TEXTURE_HEIGHT/2, 0, 0, TEXTURE_WIDTH/2, TEXTURE_HEIGHT/2);
// Make current to VG content
eglBindAPI(EGL_OPENVG_API);
eglMakeCurrent(eglman->dpy, eglman->win_surface, eglman->win_surface, eglman->vg_ctx);
// Draw VGImage target
vgSetfv(VG_CLEAR_COLOR, 4, black);
vgClear(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);
vgSeti(VG_BLEND_MODE, VG_BLEND_SRC);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_IMAGE_USER_TO_SURFACE);
vgLoadIdentity();
vgTranslate(WINDOW_WIDTH/2.0f, WINDOW_HEIGHT/2.0f);
vgScale((VGfloat)WINDOW_WIDTH/(VGfloat)TEXTURE_WIDTH * 0.8f, (VGfloat)WINDOW_HEIGHT/(VGfloat)TEXTURE_HEIGHT * 0.8f);
vgTranslate(-TEXTURE_WIDTH/2.0f, -TEXTURE_HEIGHT/2.0f);
vgDrawImage(eglman->vg_image);
// Swap buffer
eglSwapBuffers(eglman->dpy, eglman->win_surface);
return;
}
void createApple(VGPath p)
{
VGPath temp;
VGubyte segs[] = {
VG_MOVE_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS,
VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS,
VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CLOSE_PATH,
VG_MOVE_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CLOSE_PATH };
VGfloat data[] = {
1.53125,-44.681982, -3.994719,-44.681982, -8.0085183,-50.562501,
-26.5625,-50.562501, -42.918439,-50.562501, -56.46875,-34.239393,
-56.46875,-12.187501, -56.46875,26.520416, -34.65822,61.731799,
-16.84375,61.812499, -7.1741233,61.812499, -2.9337937,55.656199,
4.15625,55.656199, 11.746294,55.656199, 17.981627,62.281199,
25.4375,62.281199, 33.88615,62.281199, 50.53251,44.282999,
58.75,15.718799, 47.751307,9.086518, 40.999985,-0.228074,
41,-13.046574, 41,-27.849147, 46.64686,-34.763001,
52.4375,-39.937501, 46.111827,-47.219094, 39.0413,-50.503784,
29.09375,-50.446384, 11.146487,-50.342824, 8.6341912,-44.681982,
1.53125,-44.681982,
0.23972344,-52.075169, -2.8344902,-69.754133, 5.9303785,-81.915323,
24.152707,-86.881406, 23.71828,-70.367255, 15.114064,-58.365865,
0.23972344,-52.075169 };
temp = testCreatePath();
vgAppendPathData(temp, sizeof(segs), segs, data);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale(1,-1);
vgTransformPath(p, temp);
vgDestroyPath(temp);
}
void createPear(VGPath p)
{
VGPath temp;
VGubyte segs[] = {
VG_MOVE_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS,
VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS,
VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CLOSE_PATH,
VG_MOVE_TO_ABS, VG_CUBIC_TO_ABS, VG_CUBIC_TO_ABS, VG_CLOSE_PATH };
VGfloat data[] = {
0.0625,-90.625001, -29.44062,-89.191161, -23.07159,-32.309301,
-30.5625,-14.062501, -38.29681,4.7771994, -56.8077,20.767199,
-56.46875,42.812499, -56.1298,64.502999, -40.15822,79.731799,
-22.34375,79.812499, -4.17446,79.893199, -1.93369,71.113999,
4.15625,71.156199, 10.49619,71.198499, 13.70293,80.336799,
30.4375,80.281199, 42.49257,80.241199, 53.53251,70.782999,
58.75,58.218799, 47.0442,54.768499, 38.5,43.943499,
38.5,31.124999, 38.50001,22.754099, 42.14686,15.236999,
47.9375,10.062499, 42.2834,1.5737994, 36.5413,-6.6199006,
34.09375,-14.062501, 28.48694,-31.111801, 32.99356,-90.265511,
1.5,-90.625001,
5.1056438,-97.8762, -12.766585,-99.48239, -22.244878,-111.09615,
-22.325466,-129.98288, -6.486451,-125.28908, 2.8790668,-113.87186,
5.1056438,-97.8762 };
temp = testCreatePath();
vgAppendPathData(temp, sizeof(segs), segs, data);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale(1,-1);
vgTransformPath(p, temp);
vgDestroyPath(temp);
}
/****************************************************************************
** Application entry point
****************************************************************************/
int main()
{
// Variable set in the message handler to finish the demo
bool bDemoDone = false;
// X11 variables
Display* x11Display = 0;
Window x11Window = 0;
Colormap x11Colormap = 0;
EGLDisplay eglDisplay = 0;
EGLConfig eglConfig = 0;
EGLSurface eglSurface = 0;
EGLContext eglContext = 0;
int i32NumConfigs, i32MajorVersion, i32MinorVersion;
/*
Step 0 - Initialize OpenVG
--------------------------
The following code up to the next comment block consists of the
steps 0 to 8 taken straight from the Initialization tutorial.
*/
Window sRootWindow;
XSetWindowAttributes sWA;
unsigned int ui32Mask;
int i32Depth;
// Initializes the display and screen
x11Display = XOpenDisplay( 0 );
if (!x11Display)
{
printf("Error: Unable to open X display\n");
goto cleanup;
}
long x11Screen;
x11Screen = XDefaultScreen( x11Display );
// Gets the window parameters
sRootWindow = RootWindow(x11Display, x11Screen);
i32Depth = DefaultDepth(x11Display, x11Screen);
XVisualInfo* x11Visual;
x11Visual = new XVisualInfo;
XMatchVisualInfo( x11Display, x11Screen, i32Depth, TrueColor, x11Visual);
if (!x11Visual)
{
printf("Error: Unable to acquire visual\n");
goto cleanup;
}
x11Colormap = XCreateColormap( x11Display, sRootWindow, x11Visual->visual, AllocNone );
sWA.colormap = x11Colormap;
// Add to these for handling other events
sWA.event_mask = StructureNotifyMask | ExposureMask | ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask;
ui32Mask = CWBackPixel | CWBorderPixel | CWEventMask | CWColormap;
// Creates the X11 window
x11Window = XCreateWindow( x11Display, RootWindow(x11Display, x11Screen), 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT,
0, CopyFromParent, InputOutput, CopyFromParent, ui32Mask, &sWA);
XMapWindow(x11Display, x11Window);
XFlush(x11Display);
eglDisplay = (EGLDisplay)eglGetDisplay((NativeDisplayType)x11Display);
if(!eglInitialize(eglDisplay, &i32MajorVersion, &i32MinorVersion))
{
printf("Error: eglInitialize() failed.\n");
goto cleanup;
}
eglBindAPI(EGL_OPENVG_API);
static const int ai32ConfigAttribs[] =
{
EGL_RED_SIZE, 5,
EGL_GREEN_SIZE, 6,
EGL_BLUE_SIZE, 5,
EGL_ALPHA_SIZE, 0,
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENVG_BIT,
EGL_NONE
};
if(!eglChooseConfig(eglDisplay, ai32ConfigAttribs, &eglConfig, 1, &i32NumConfigs) || (i32NumConfigs != 1))
{
printf("Error: eglChooseConfig() failed.\n");
goto cleanup;
}
eglSurface = eglCreateWindowSurface(eglDisplay, eglConfig, (NativeWindowType)x11Window, NULL);
if((eglGetError() != EGL_SUCCESS) || (eglSurface == EGL_NO_SURFACE))
{
printf("Error: eglCreateWindowSurface() failed.\n");
goto cleanup;
}
eglContext = eglCreateContext(eglDisplay, eglConfig, NULL, NULL);
if((eglGetError() != EGL_SUCCESS) || (eglContext == EGL_NO_CONTEXT))
{
printf("Error: eglCreateContext() failed.\n");
goto cleanup;
}
eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext);
if(eglGetError() != EGL_SUCCESS)
{
printf("Error: eglMakeCurrent() failed.\n");
goto cleanup;
}
/*
Steps 1 to 4 - Prepare OpenVG to draw a triangle
------------------------------------------------
At this point we could theoretically start drawing with OpenVG. But
we have to specify what to draw and how to draw it first.
*/
/*
Step 1 - Set up a device independent coordinate system
------------------------------------------------------
Initially, the OpenVG coordinate system is based on the output resolution.
To get a device independent coordinate system, we need to apply a
transformation: Scaling by the output resolution means that coordinates
between (0, 0) and (1, 1) will be visible on screen, with the origin
in the lower left corner.
Transformations are described more in-depth in the Transforms tutorial.
It should be noted that different aspect ratios often require
special attention regarding the layout of elements on screen.
*/
int i32WindowWidth, i32WindowHeight;
eglQuerySurface(eglDisplay, eglSurface, EGL_WIDTH, &i32WindowWidth);
eglQuerySurface(eglDisplay, eglSurface, EGL_HEIGHT, &i32WindowHeight);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale((float)i32WindowWidth, (float)i32WindowHeight);
/*
Step 2 - Create a path
----------------------
Drawing shapes with OpenVG requires a path which represents a series of
line and curve segments describing the outline of the shape. The shape
does not need to be closed, but for now we will start with a simple
triangle.
First we create a path handle, then we append segment and point data.
Creating a path involves choosing a datatype used for point data (we use
float here, indicated by VG_PATH_DATATYPE_F) and capabilities that we want
to use. Picking the right capabilities is important as the OpenVG driver
can use a more efficient and compact internal representation for paths
with limited capabilities. We only need two capabilities for this tutorial:
adding data to the path and drawing it, with the latter being implicitly
enabled for all paths.
*/
VGPath vgTriangle;
vgTriangle = vgCreatePath(
VG_PATH_FORMAT_STANDARD,
VG_PATH_DATATYPE_F,
1.0f, 0.0f, 4, 3,
(unsigned int)VG_PATH_CAPABILITY_APPEND_TO);
/*
The segments of a path are described as a series of commands, represented as
an array of bytes. You can imagine the commands being performed by a pen:
First the pen moves to a starting location without drawing, from there it
draws a line to a second point. Then another line to a third point. After
that, it closes the shape by drawing a line from the last point to the
starting location: triangle finished!
The suffixes _ABS and _REL attached to the commands indicate whether the
coordinates are to be interpreted as absolute locations (seen from the
origin)or as being relative to the location of the current point.
*/
VGubyte aui8PathSegments[4];
aui8PathSegments[0] = VG_MOVE_TO_ABS;
aui8PathSegments[1] = VG_LINE_TO_ABS;
aui8PathSegments[2] = VG_LINE_TO_ABS;
aui8PathSegments[3] = VG_CLOSE_PATH;
/*
In addition to the array of commands, the path needs a list of points. A
command can "consume" from 0 to 6 values, depending on its type. MOVE_TO
and LINE_TO each take two values, CLOSE_PATH takes none.
A triangle requires 3 2D vertices.
*/
VGfloat afPoints[6];
afPoints[0] = 0.3f;
afPoints[1] = 0.3f;
afPoints[2] = 0.7f;
afPoints[3] = 0.3f;
afPoints[4] = 0.5f;
afPoints[5] = 0.7f;
/*
When appending data to the path, only the number of segments needs to be
specified since the number of points used depends on the actual commands.
*/
vgAppendPathData(vgTriangle, 4, aui8PathSegments, afPoints);
/*
Path capabilities should be removed as soon as they are no longer needed.
The OpenVG implementation might work more efficiently if it knows that
path data will not change since it can use an optimized internal
representation.
*/
vgRemovePathCapabilities(vgTriangle, VG_PATH_CAPABILITY_APPEND_TO);
/*
Step 3 - Create a paint
-----------------------
To fill a shape, we need a paint that describes how to fill it: a gradient,
pattern, or single color. Here we choose a paint with type COLOR that
is a simple opaque red. vgSetColor is a shortcut function that takes a
non-premultiplied sRGBA color encoded as a 32bit integer in RGBA_8888 form.
*/
VGPaint vgFillPaint;
vgFillPaint = vgCreatePaint();
vgSetParameteri(vgFillPaint, VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(vgFillPaint, 0xFFFFAAFF);
/*
Step 4 - Prepare the render loop
--------------------------------
The clear color will be used whenever calling vgClear(). The color is given
as non-premultiplied sRGBA, represented by four float values.
*/
VGfloat afClearColor[4];
afClearColor[0] = 0.6f;
afClearColor[1] = 0.8f;
afClearColor[2] = 1.0f;
afClearColor[3] = 1.0f;
// Set the clear color
vgSetfv(VG_CLEAR_COLOR, 4, afClearColor);
/*
Step 5 - Render loop
--------------------
Start the render loop for 1000 frames!
*/
for(int i = 0; i < 1000; ++i)
{
// Check if the message handler finished the demo
if (bDemoDone) break;
// Clear the whole surface with the clear color
vgClear(0, 0, i32WindowWidth, i32WindowHeight);
// Set the current fill paint...
vgSetPaint(vgFillPaint, VG_FILL_PATH);
// Draw the triangle!
vgDrawPath(vgTriangle, VG_FILL_PATH);
/*
Drawing is double buffered, so you never see any intermediate
results of the drawing. When you have finished drawing
you have to call eglSwapBuffers to make the results appear on
screen.
*/
eglSwapBuffers(eglDisplay, eglSurface);
// Managing the X11 messages
int i32NumMessages = XPending( x11Display );
for( int i = 0; i < i32NumMessages; i++ )
{
XEvent event;
XNextEvent( x11Display, &event );
switch( event.type )
{
// Exit on mouse click
case ButtonPress:
bDemoDone = true;
break;
default:
break;
}
}
}
/*
Step 6 - Destroy resources
--------------------------
OpenVG resources like paths and paints need to be destroyed
when they are no longer needed.
*/
vgDestroyPath(vgTriangle);
vgDestroyPaint(vgFillPaint);
cleanup:
/*
Step 7 - Terminate OpenVG
-------------------------
Again, the following code is taken from the Initialization tutorial,
steps 10 and 11.
*/
eglMakeCurrent(eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
eglTerminate(eglDisplay);
if (x11Window) XDestroyWindow(x11Display, x11Window);
if (x11Colormap) XFreeColormap( x11Display, x11Colormap );
if (x11Display) XCloseDisplay(x11Display);
// Say goodbye
printf("%s finished.", pszAppName);
return 0;
}
// Scale scales by x, y
void Scale(VGfloat x, VGfloat y) {
vgScale(x, y);
}
// ---------------------------------------------------------------------------
// Computation of the viewport to viewbox transformation matrix
// ---------------------------------------------------------------------------
void CNvgFitToViewBoxImpl::SetWindowViewportTrans(TRect aViewPort, TSize aSize)
{
//VIEWPORT NUMBERS
TReal lViewPortX = aViewPort.iTl.iX;
TReal lViewPortY = aViewPort.iTl.iY;
TReal lViewPortWidth = aViewPort.Width();
TReal lViewPortHeight = aViewPort.Height();
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgTranslate(lViewPortX, lViewPortY );
/* 2. Scale */
TReal lViewBoxXmin;
TReal lViewBoxYmin;
TReal lViewBoxWidth;
TReal lViewBoxHeight;
if ( iViewBoxDefined )
{
lViewBoxXmin = ivbX;
lViewBoxYmin = ivbY;
lViewBoxWidth = ivbW;
lViewBoxHeight = ivbH;
}
else
{
//this will default viewBox to <svg> element width and height
lViewBoxXmin = 0;
lViewBoxYmin = 0;
lViewBoxWidth = aSize.iWidth;
lViewBoxHeight = aSize.iHeight;
}
if ( lViewBoxWidth == 0.0f || lViewBoxHeight == 0.0f )
{
return;
}
TReal sx = lViewPortWidth / lViewBoxWidth;
TReal sy = lViewPortHeight / lViewBoxHeight;
if ( sx == 0.0f || sy == 0.0f )
{
return;
}
TReal xtrans = TReal( -1.0f ) * lViewBoxXmin;
TReal ytrans = TReal( -1.0f ) * lViewBoxYmin;
switch ( iAlign )
{
case ENvgPreserveAspectRatio_None:
/* Non uniform scaling */
//none - Do not force uniform scaling.
//Scale the graphic content of the given element
//non-uniformly if necessary such that the element's
//bounding box exactly matches the viewport rectangle.
//(Note: if <align> is none, then the optional <meetOrSlice> value is ignored.)
break;
case ENvgPreserveAspectRatio_XminYmin:
//Align the <min-x> of the element's viewBox with the smallest X value of the viewport.
//Align the <min-y> of the element's viewBox with the smallest Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
//no change for xtrans...default above
}
else // ( sx < sy )
{
sy = sx;
//no change for ytrans...default above
}
}
else if (iMeetSlice == ENvgSlice)
{
if (sx > sy)
{
sy = sx;
}
else // ( sx < sy )
{
sx = sy;
}
}
break;
case ENvgPreserveAspectRatio_XmidYmin:
//Align the midpoint X value of the element's viewBox with the midpoint X value of the viewport.
//Align the <min-y> of the element's viewBox with the smallest Y value of the viewport.
//Align the <min-x> of the element's viewBox with the smallest X value of the viewport.
//Align the <min-y> of the element's viewBox with the smallest Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = ( ( lViewPortWidth - (( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) )\
* 0.5 ) / sx - lViewBoxXmin;
}
else // ( sx < sy )
{
sy = sx;
//no change for ytrans...default above
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
}
else //( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx;
xtrans = xtrans/2.0 - lViewBoxXmin;
}
}
break;
case ENvgPreserveAspectRatio_XmaxYmin:
//Align the <min-x>+<width> of the element's viewBox with the maximum X value of the viewport.
//Align the <min-y> of the element's viewBox with the smallest Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = (( lViewPortWidth - ( ( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) ) ) / sx\
- lViewBoxXmin;
}
else // ( sx < sy )
{
sy = sx;
//no change for ytrans...default above
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
//no change for ytrans...default above
}
else // ( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx - lViewBoxXmin;
}
}
break;
case ENvgPreserveAspectRatio_XminYmid:
//Align the <min-x> of the element's viewBox with the smallest X value of the viewport.
//Align the midpoint Y value of the element's viewBox with the midpoint Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
//no change for xtrans...default above
}
else // ( sx < sy )
{
sy = sx;
ytrans = ( ( TReal )
( lViewPortHeight - ( ( TReal ) ( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) )\
* TReal(.5) ) /sy - lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx;
ytrans = ytrans/2.0 - lViewBoxYmin;
}
else
{
sx = sy;
}
}
break;
case ENvgPreserveAspectRatio_XmidYmid:
//(default) case
//Align the midpoint X value of the element's viewBox with the midpoint X value of the viewport.
//Align the midpoint Y value of the element's viewBox with the midpoint Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = (( lViewPortWidth - (( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) ) * \
0.5 ) / sx - lViewBoxXmin;
}
else if ( sx < sy )
{
sy = sx;
ytrans = (( lViewPortHeight - (( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) ) * \
0.5 ) /sy - lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx;
ytrans = ytrans/2.0 - lViewBoxYmin;
}
else // ( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx;
xtrans = xtrans/2.0 - lViewBoxXmin;
}
}
break;
case ENvgPreserveAspectRatio_XmaxYmid:
//Align the <min-x>+<width> of the element's viewBox with the maximum X value of the viewport.
//Align the midpoint Y value of the element's viewBox with the midpoint Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = (( lViewPortWidth - (( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) ) ) / sx \
- lViewBoxXmin;
}
else //( sx < sy )
{
sy = sx;
ytrans = (( lViewPortHeight - (( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) ) \
* 0.5 ) /sy - lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx;
ytrans = ytrans/2.0 - lViewBoxYmin;
}
else //( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx - lViewBoxXmin;
}
}
break;
case ENvgPreserveAspectRatio_XminYmax:
//Align the <min-x> of the element's viewBox with the smallest X value of the viewport.
//Align the <min-y>+<height> of the element's viewBox with the maximum Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
//no change for xtrans...default above
}
else //( sx < sy )
{
sy = sx;
ytrans = (( lViewPortHeight - (( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) ) ) /sy \
- lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx - lViewBoxYmin;
}
else //( sx < sy )
{
sx = sy;
}
}
break;
case ENvgPreserveAspectRatio_XmidYmax:
//Align the midpoint X value of the element's viewBox with the midpoint X value of the viewport.
//Align the <min-y>+<height> of the element's viewBox with the maximum Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = (( lViewPortWidth - (( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) ) \
* 0.5 ) / sx - lViewBoxXmin;
}
else //( sx < sy )
{
sy = sx;
ytrans = (( lViewPortHeight - (( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) ) ) /sy \
- lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx - lViewBoxYmin;
}
else //( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx;
xtrans = xtrans/2.0 - lViewBoxXmin;
}
}
break;
case ENvgPreserveAspectRatio_XmaxYmax:
//Align the <min-x>+<width> of the element's viewBox with the maximum X value of the viewport.
//Align the <min-y>+<height> of the element's viewBox with the maximum Y value of the viewport.
if (iMeetSlice == ENvgMeet)
{
if ( sx > sy )
{
sx = sy;
xtrans = (( lViewPortWidth - (( lViewBoxWidth / lViewBoxHeight ) * lViewPortHeight ) ) ) / sx\
- lViewBoxXmin;
}
else //( sx < sy )
{
sy = sx;
ytrans = (( lViewPortHeight - (( lViewBoxHeight / lViewBoxWidth ) * lViewPortWidth ) ) ) /sy \
- lViewBoxYmin;
}
}
else if (iMeetSlice == ENvgSlice)
{
if ( sx > sy )
{
sy = sx;
ytrans = lViewPortHeight - sx*lViewBoxHeight;
ytrans = ytrans/sx - lViewBoxYmin;
}
else //( sx < sy )
{
sx = sy;
xtrans = lViewPortWidth - sx*lViewBoxWidth;
xtrans = xtrans/sx - lViewBoxXmin;
}
}
break;
default:
break;
}
vgScale( sx, sy);
vgTranslate( xtrans, ytrans );
}
/*******************************************************************************
* Function Name : InitView
* Returns : true if no error occured
* Description : Code in InitView() will be called by the Shell upon a change
* in the rendering context.
* Used to initialise variables that are dependent on the rendering
* context (e.g. textures, vertex buffers, etc.)
*******************************************************************************/
bool OVGMaskLayer::InitView()
{
// Get screen dimensions
m_ui32ScreenWidth = PVRShellGet(prefWidth);
m_ui32ScreenHeight= PVRShellGet(prefHeight);
// Create the paths so we have something to look at.
CreatePath();
// Set the render quality so the stroke borders have some form of anti-aliasing
vgSeti(VG_RENDERING_QUALITY, VG_RENDERING_QUALITY_BETTER);
// Create the paints that the paths will use
m_avgColourPaint[0] = vgCreatePaint();
vgSetParameteri(m_avgColourPaint[0], VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(m_avgColourPaint[0], PVRTRGBA(255,255,15,255));
m_avgColourPaint[1] = vgCreatePaint();
vgSetParameteri(m_avgColourPaint[1], VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(m_avgColourPaint[1], PVRTRGBA(255,50,0, 255));
m_avgColourPaint[2] = vgCreatePaint();
vgSetParameteri(m_avgColourPaint[2], VG_PAINT_TYPE, VG_PAINT_TYPE_COLOR);
vgSetColor(m_avgColourPaint[2], PVRTRGBA(50,250,15, 255));
/*
Load the images we're going to use to modify the mask layer.
For more details on masking please refer to our OVGMasking training course
*/
// Create the VGImages.
VGImage vgMaskImg, vgMaskImg2;
// Using the PVR Tools we're going to load the mask data from a pvr file
if(PVRTImageLoadFromPVR(c_szMask1File, &vgMaskImg) != PVR_SUCCESS)
{
PVRShellSet(prefExitMessage, "Error: Failed to open mask1.pvr.");
return false;
}
if(PVRTImageLoadFromPVR(c_szMask2File, &vgMaskImg2) != PVR_SUCCESS)
{
PVRShellSet(prefExitMessage, "Error: Failed to open mask2.pvr.");
return false;
}
/*
Create a mask layer
A VGMaskLayer is an object that allows you to store and manipulate the drawing surface's mask layer
*/
m_vgMaskLayer[0] = vgCreateMaskLayer(m_ui32ScreenWidth, m_ui32ScreenHeight);
if(m_vgMaskLayer[0] == 0)
{
PVRShellSet(prefExitMessage, "Error: Failed to create mask layer.");
return false;
}
// Tile the first image in the drawing surface's masking layer
TileImageInMask(vgMaskImg, VG_SET_MASK);
/*
Copy the contents of the drawing surface mask layer into our mask layer object
vgCopyMask has the following parameters
VGMaskLayer maskLayer, VGint dx, VGint dy, VGint sx, VGint sy, VGint width, VGint height)
where
masklayer is the masklayer to copy to
dx, dy are the coordinates to start the copy at in the masklayer
sx, sy are the coordinates to start the copy from in the source mask layer
width and the height are the width and height of the region you wish to copy.
In our case we're copying the full mask layer.
*/
vgCopyMask(m_vgMaskLayer[0], 0, 0, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Create the second mask layer
m_vgMaskLayer[1] = vgCreateMaskLayer(m_ui32ScreenWidth, m_ui32ScreenHeight);
if(m_vgMaskLayer[1] == 0)
{
PVRShellSet(prefExitMessage, "Error: Failed to create mask layer.");
return false;
}
// Replace the contents of the mask by tiling the second image
TileImageInMask(vgMaskImg2, VG_SET_MASK);
// Copy the contents of the mask into the second mask layer
vgCopyMask(m_vgMaskLayer[1], 0, 0, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Destroy the images as they are no longer needed
vgDestroyImage(vgMaskImg);
vgDestroyImage(vgMaskImg2);
// Set the mask to ones
vgMask(VG_INVALID_HANDLE, VG_FILL_MASK, 0, 0, m_ui32ScreenWidth, m_ui32ScreenHeight);
// Init PrintVG
m_PrintVG.Initialize(m_ui32ScreenWidth, m_ui32ScreenHeight);
// Setup the transformation to scale the paths to fit the screen
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadIdentity();
vgScale((float) m_ui32ScreenWidth, (float) m_ui32ScreenHeight);
// Reduce the stroke size to compensate for our scaling
vgSetf(VG_STROKE_LINE_WIDTH, 1.0f / m_ui32ScreenHeight);
//Create and set the clear colour
VGfloat afClearColour[] = { 0.6f, 0.8f, 1.0f, 1.0f };
vgSetfv(VG_CLEAR_COLOR, 4, afClearColour);
return true;
}
void text_widget_draw_text ( struct TEXT_WIDGET_HANDLE handle )
{
if ( handle.d == NULL || handle.d->layout == NULL )
return;
vgSetPaint( handle.d->foreground, VG_FILL_PATH );
vgSeti( VG_MATRIX_MODE, VG_MATRIX_GLYPH_USER_TO_SURFACE );
vgLoadIdentity();
#if 0
// Overscan (in dots, evidently).
vgTranslate( 14.f, 8.f );
#endif
// Offset in mm.
vgScale( handle.d->dpmm_x, handle.d->dpmm_y );
// Move to the corner.
vgTranslate( handle.d->x_mm, handle.d->y_mm );
// Back to dots.
vgScale( 1.f/handle.d->dpmm_x, 1.f/handle.d->dpmm_y );
int height = PANGO_PIXELS( pango_layout_get_height( handle.d->layout ) );
PangoLayoutIter* li = pango_layout_get_iter( handle.d->layout );
do {
PangoLayoutRun* run = pango_layout_iter_get_run( li );
if ( run == NULL )
continue;
PangoRectangle logical_rect;
int baseline_pango = pango_layout_iter_get_baseline( li );
int baseline_pixel = PANGO_PIXELS( baseline_pango );
pango_layout_iter_get_run_extents( li, NULL, &logical_rect );
int x_pixel = PANGO_PIXELS( logical_rect.x );
PangoFont* pg_font = run->item->analysis.font;
FT_Face face = pango_fc_font_lock_face( (PangoFcFont*)pg_font );
if ( face != NULL ) {
struct VG_DATA* vg_data = face->size->generic.data;
if ( vg_data != NULL ) {
// About the only extra attribute we can manage is the foreground
// color. But, it might be nice to render a background color
// to see just how badly the text is fitted into the widget
// box.
GSList* attr_item = run->item->analysis.extra_attrs;
while ( attr_item ) {
PangoAttribute* attr = attr_item->data;
switch ( attr->klass->type ) {
case PANGO_ATTR_FOREGROUND:
{
PangoColor color = ((PangoAttrColor*)attr)->color;
VGfloat new_color[] = { (float)color.red / 65535.f,
(float)color.green / 65535.f,
(float)color.blue / 65535.f, 1.f };
VGPaint new_paint = vgCreatePaint();
vgSetParameterfv( new_paint, VG_PAINT_COLOR, 4, new_color );
vgSetPaint( new_paint, VG_FILL_PATH );
vgDestroyPaint( new_paint );
}
break;
default:
printf( "\tHmm. Unknown attribute: %d\n", attr->klass->type );
}
attr_item = attr_item->next;
}
// Note: inverted Y coordinate
VGfloat point[2] = { x_pixel, height - baseline_pixel };
vgSetfv( VG_GLYPH_ORIGIN, 2, point );
VGFont vg_font = vg_data->font;
int g;
for ( g = 0; g < run->glyphs->num_glyphs; g++ ) {
vgDrawGlyph( vg_font, run->glyphs->glyphs[g].glyph, VG_FILL_PATH,
VG_TRUE );
}
if ( vgGetPaint( VG_FILL_PATH ) != handle.d->foreground ) {
vgSetPaint( handle.d->foreground, VG_FILL_PATH );
}
}
pango_fc_font_unlock_face( (PangoFcFont*)pg_font );
}
} while ( pango_layout_iter_next_run( li ) );
// Iterators are not free.
pango_layout_iter_free( li);
}
/*******************************************************************************
* 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;
}
TInt CNVGCSIcon::DoDrawL(const TSize aSize)
{
TInt ret = KErrNone;
vgSetPaint(iFillPaint, VG_FILL_PATH);
vgSetPaint(iStrokePaint, VG_STROKE_PATH);
iLastFillPaintColor = 0;
iLastStrkePaintColor = 0;
iLastFillPaintType = 0;
iLastStrokePaintType = 0;
VGfloat lCurrentPathMatrix[9];
vgGetMatrix(lCurrentPathMatrix);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
vgLoadMatrix(lCurrentPathMatrix);
SetRotation();
#ifdef __MIRROR_
vgScale(1.0f, -1.0f);
vgTranslate(0, (VGfloat)(-aSize.iHeight) );
#endif
SetViewBoxToViewTransformationL(aSize);
vgSeti(VG_MATRIX_MODE, VG_MATRIX_PATH_USER_TO_SURFACE);
VGfloat currentMatrix[9];
vgGetMatrix(currentMatrix);
iNVGIconData->BeginRead();
while (!iNVGIconData->EOF())
{
switch (iNVGIconData->ReadInt32L())
{
case EPath:
{
VGPath path = (VGPath)iNVGIconData->ReadInt32L();
VGPaintMode paintMode = (VGPaintMode)iNVGIconData->ReadInt32L();
if (path == VG_INVALID_HANDLE)
{
vgDrawPath(iPath, paintMode);
}
else
{
vgDrawPath(path, paintMode);
}
break;
}
case EPathData:
{
if (iPath != VG_INVALID_HANDLE)
{
VGint numSegments;
VGubyte * pathSegments = 0;
VGubyte * pathData = 0;
numSegments = iNVGIconData->ReadInt32L();
pathSegments = new (ELeave) VGubyte[numSegments];
CleanupStack::PushL(TCleanupItem(CleanupArray, pathSegments));
if (pathSegments)
{
iNVGIconData->ReadL(pathSegments, numSegments);
VGint coordinateCount = iNVGIconData->ReadInt32L();
pathData = new (ELeave) VGubyte[coordinateCount * 4];
if (pathData)
{
CleanupStack::PushL(TCleanupItem(CleanupArray, pathData));
iNVGIconData->ReadL(pathData, coordinateCount * 4);
vgClearPath(iPath, VG_PATH_CAPABILITY_APPEND_TO);
vgAppendPathData(iPath, numSegments, pathSegments, pathData);
CleanupStack::PopAndDestroy();
}
}
CleanupStack::PopAndDestroy();
}
break;
}
case EPaint:
{
DrawPaintL(iFillPaint, VG_MATRIX_FILL_PAINT_TO_USER, iLastFillPaintType, iLastFillPaintColor, VG_FILL_PATH);
break;
}
case EColorRamp:
{
iNVGIconData->ReadInt32L();
break;
}
case ETransform:
{
TInt flag;
VGfloat transformMatrix[9];
TPtr8 tmPtr((TUint8 *)transformMatrix, 9 * sizeof(VGfloat));
iNVGIconData->ReadL(tmPtr, 9 * sizeof(VGfloat));
flag = iNVGIconData->ReadInt32L();
vgLoadMatrix(currentMatrix);
if (flag)
{
vgMultMatrix(transformMatrix);
}
}
break;
case EStrokeWidth:
{
VGfloat strokeWidth = iNVGIconData->ReadReal32L();
vgSetf(VG_STROKE_LINE_WIDTH, strokeWidth);
break;
}
case EStrokeMiterLimit:
{
VGfloat miterLimit = iNVGIconData->ReadReal32L();
vgSetf(VG_STROKE_MITER_LIMIT, miterLimit);
break;
}
case EStrokeLineJoinCap:
{
VGint lineJoin = iNVGIconData->ReadInt32L();
VGint cap = iNVGIconData->ReadInt32L();
vgSeti(VG_STROKE_JOIN_STYLE, (VGJoinStyle)lineJoin);
vgSeti(VG_STROKE_CAP_STYLE, (VGCapStyle)cap);
break;
}
case EStrokePaint:
{
DrawPaintL(iStrokePaint, VG_MATRIX_STROKE_PAINT_TO_USER, iLastStrokePaintType, iLastStrkePaintColor, VG_STROKE_PATH);
break;
}
case EStrokeColorRamp:
{
iNVGIconData->ReadInt32L();
break;
}
default:
{
User::Leave(KErrCorrupt);
break;
}
}
}
iNVGIconData->EndRead();
return ret;
}
TBool CHuiFxVg10TransformFilter::Draw(CHuiFxEngine& /*aEngine*/, CHuiGc& /*aGc*/,
CHuiFxRenderbuffer& aTarget, CHuiFxRenderbuffer& aSource,
const TRect& /*aTargetRect*/, const TRect& aSourceRect, TBool /*aHasSurface*/)
{
aSource.BindAsTexture(ERenderbufferUsageReadOnly);
aTarget.BindAsRenderTarget();
VGImage srcImage = (reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->AcquireSubImage(aSourceRect);
vgLoadIdentity();
vgScale(iScaleX, iScaleY);
vgSeti(VG_BLEND_MODE, VG_BLEND_SRC);
vgSeti(VG_IMAGE_MODE, VG_DRAW_IMAGE_NORMAL);
identity();
// Matrix multiplication is generally not commutative.
// Therefore the order of the transformations matters.
// In order to prevent the scaling ang skewing from affecting the translation,
// if seems wiser to do the translation first, otherwise the results seem to be unpredictable.
// Translation
if (iTranslationX != 0.0f || iTranslationY != 0.0f || iTranslationZ != 0.0f)
{
translate(iTranslationX, iTranslationY, iTranslationZ);
}
// Scaling
if (iScaleX != 1.0f || iScaleY != 1.0f || iScaleZ != 1.0f)
{
translate(iScaleOriginX, iScaleOriginY, iScaleOriginZ);
scale(iScaleX, iScaleY, iScaleZ);
translate(-iScaleOriginX, -iScaleOriginY, -iScaleOriginZ);
}
// Skewing
if (iSkewAngleX != 0.0f || iSkewAngleY != 0.0f || iSkewAngleZ != 0.0f)
{
const TReal32 radsPerDeg = 2.0f * (float)M_PI / 360.0f;
TReal32 skewX = tan(iSkewAngleX * radsPerDeg);
TReal32 skewY = tan(iSkewAngleY * radsPerDeg);
TReal32 skewZ = tan(iSkewAngleZ * radsPerDeg);
translate(iSkewOriginX, iSkewOriginY, iSkewOriginZ);
shear(skewX, skewY, skewZ);
translate(-iSkewOriginX, -iSkewOriginY, -iSkewOriginZ);
}
// Rotation
if (iRotationAngle != 0.0f)
{
translate(iRotationOriginX, iRotationOriginY, iRotationOriginZ);
rotate(iRotationAngle, iRotationAxisX, iRotationAxisY, iRotationAxisZ);
translate(-iRotationOriginX, -iRotationOriginY, -iRotationOriginZ);
}
/*
// Translation
if (iTranslationX != 0.0f || iTranslationY != 0.0f || iTranslationZ != 0.0f)
{
translate(iTranslationX, iTranslationY, iTranslationZ);
}
*/
ASSERT(!"TODO: implement the following:");
// TODO: project vertices
// TODO: create warp quad matrix from projected vertices,
// see http://torus.untergrund.net/misc/projective_image_warping.pdf
// TODO load matrix
vgDrawImage(srcImage);
// TODO: pixel relative parameters
HUIFX_VG_INVARIANT();
(reinterpret_cast<CHuiFxVg10RenderbufferBase*>(&aSource))->ReleaseSubImage(srcImage);
aTarget.UnbindAsRenderTarget();
aSource.UnbindAsTexture();
return ETrue;
}