wxBitmap* gdiplusResize(wxBitmap* bitmap, const FloatSize& size)
{
IntSize intSize = IntSize(ceilf(size.width()), ceilf(size.height()));
if (intSize.width() == bitmap->GetWidth() && intSize.height() == bitmap->GetHeight())
return new wxBitmap(*bitmap); // just return a copy if the asked for the same size
wxBitmap* newBitmap = new wxBitmap(intSize.width(), intSize.height(), 32);
newBitmap->UseAlpha();
wxMemoryDC memdc(*newBitmap);
wxGraphicsContext* gc = wxGraphicsContext::Create(memdc);
wxGraphicsBitmap gcbitmap(gc->CreateBitmap(*bitmap));
Graphics* graphics = (Graphics*)gc->GetNativeContext();
graphics->Clear(Gdiplus::Color(0, 0, 0, 0));
// Only use HighQualityBicubic when downsampling.
InterpolationMode mode;
if (size.width() < (int)bitmap->GetWidth() && size.height() < (int)bitmap->GetHeight())
mode = InterpolationModeHighQualityBicubic;
else
mode = InterpolationModeBicubic;
graphics->SetInterpolationMode(mode);
graphics->DrawImage((Bitmap*)gcbitmap.GetNativeBitmap(), 0.0, 0.0, size.width(), size.height());
premultiplyAlpha(*newBitmap);
delete gc;
return newBitmap;
}
void TestPlugin::drawPrimitive()
{
DCHECK_EQ(m_scene.primitive, PrimitiveTriangle);
DCHECK(m_scene.vbo);
DCHECK(m_scene.program);
m_context->useProgram(m_scene.program);
// Bind primitive color.
float color[4];
premultiplyAlpha(m_scene.primitiveColor, m_scene.opacity, color);
m_context->uniform4f(m_scene.colorLocation, color[0], color[1], color[2], color[3]);
// Bind primitive vertices.
m_context->bindBuffer(GL_ARRAY_BUFFER, m_scene.vbo);
m_context->enableVertexAttribArray(m_scene.positionLocation);
m_context->vertexAttribPointer(m_scene.positionLocation, 3, GL_FLOAT, GL_FALSE, 0, 0);
m_context->drawArrays(GL_TRIANGLES, 0, 3);
}
bool TestPlugin::initScene()
{
float color[4];
premultiplyAlpha(m_scene.backgroundColor, m_scene.opacity, color);
m_colorTexture = m_context->createTexture();
m_framebuffer = m_context->createFramebuffer();
m_context->viewport(0, 0, m_rect.width, m_rect.height);
m_context->disable(GL_DEPTH_TEST);
m_context->disable(GL_SCISSOR_TEST);
m_context->clearColor(color[0], color[1], color[2], color[3]);
m_context->enable(GL_BLEND);
m_context->blendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
return m_scene.primitive != PrimitiveNone ? initProgram() && initPrimitive() : true;
}
