Function main

Source/1-GraphicsAPI/14-Offscreen/Source/main.cpp:13–134

};

int main(int argc, char **argv)
{
	qputenv("QSG_INFO", "1");
	QApplication app(argc, argv);

    QSharedPointer<QRhiEx> rhi = QRhiEx::newRhiEx();
	QScopedPointer<QRhiTexture> renderTargetTexture;
	QScopedPointer<QRhiTextureRenderTarget> renderTarget;
	QScopedPointer<QRhiRenderPassDescriptor> renderTargetDesc;

	{
		renderTargetTexture.reset(rhi->newTexture(QRhiTexture::RGBA8, QSize(1280, 720), 1, QRhiTexture::RenderTarget | QRhiTexture::UsedAsTransferSource));
		renderTargetTexture->create();
		renderTarget.reset(rhi->newTextureRenderTarget({ renderTargetTexture.get() }));
		renderTargetDesc.reset(renderTarget->newCompatibleRenderPassDescriptor());
		renderTarget->setRenderPassDescriptor(renderTargetDesc.get());
		renderTarget->create();
	}


	QScopedPointer<QRhiBuffer> vertexBuffer;
	QScopedPointer<QRhiShaderResourceBindings> shaderBindings;
	QScopedPointer<QRhiGraphicsPipeline> mPipeline;

	{
		vertexBuffer.reset(rhi->newBuffer(QRhiBuffer::Immutable, QRhiBuffer::VertexBuffer, sizeof(VertexData)));
		vertexBuffer->create();

		shaderBindings.reset(rhi->newShaderResourceBindings());
		shaderBindings->create();

		mPipeline.reset(rhi->newGraphicsPipeline());

		QRhiGraphicsPipeline::TargetBlend targetBlend;
		targetBlend.enable = false;
		mPipeline->setTargetBlends({ QRhiGraphicsPipeline::TargetBlend() });

		mPipeline->setSampleCount(renderTarget->sampleCount());

		mPipeline->setDepthTest(false);
		mPipeline->setDepthOp(QRhiGraphicsPipeline::Always);
		mPipeline->setDepthWrite(false);

		QShader vs = rhi->newShaderFromCode(QShader::VertexStage, R"(#version 440
			layout(location = 0) in vec2 position;
			out gl_PerVertex { 
				vec4 gl_Position;
			};
			void main(){
				gl_Position = vec4(position,0.0f,1.0f);
			}
		)");
		Q_ASSERT(vs.isValid());

		QShader fs = rhi->newShaderFromCode(QShader::FragmentStage, R"(#version 440
			layout(location = 0) out vec4 fragColor;
			void main(){
				fragColor = vec4(0.1f,0.5f,0.9f,1.0f);