Method init

3rdparty/bgfx/src/bgfx.cpp:637–678

	static constexpr uint32_t kNumBatchIndices  = kNumCharsPerBatch*6;

	void TextVideoMemBlitter::init(uint8_t scale)
	{
		BGFX_CHECK_API_THREAD();
		m_layout
			.begin()
			.add(Attrib::Position,  3, AttribType::Float)
			.add(Attrib::Color0,    4, AttribType::Uint8, true)
			.add(Attrib::Color1,    4, AttribType::Uint8, true)
			.add(Attrib::TexCoord0, 2, AttribType::Float)
			.end();

		uint16_t width  = 2048;
		uint16_t height = 24;
		uint8_t  bpp    = 1;
		uint32_t pitch  = width*bpp;

		const Memory* mem;

		mem = alloc(pitch*height);
		uint8_t* rgba = mem->data;
		charsetFillTexture(vga8x8, rgba, 8, pitch, bpp);
		charsetFillTexture(vga8x16, &rgba[8*pitch], 16, pitch, bpp);
		m_texture = createTexture2D(width, height, false, 1, TextureFormat::R8
			, BGFX_SAMPLER_MIN_POINT
			| BGFX_SAMPLER_MAG_POINT
			| BGFX_SAMPLER_MIP_POINT
			| BGFX_SAMPLER_U_CLAMP
			| BGFX_SAMPLER_V_CLAMP
			, mem
			);

		ShaderHandle vsh = createEmbeddedShader(s_embeddedShaders, g_caps.rendererType, "vs_debugfont");
		ShaderHandle fsh = createEmbeddedShader(s_embeddedShaders, g_caps.rendererType, "fs_debugfont");

		BX_ASSERT(isValid(vsh) && isValid(fsh), "Failed to create embedded blit shaders");

		m_program = createProgram(vsh, fsh, true);

		m_vb = s_ctx->createTransientVertexBuffer(kNumBatchVertices*m_layout.m_stride, &m_layout);
		m_ib = s_ctx->createTransientIndexBuffer(kNumBatchIndices*2);
		m_scale = bx::max<uint8_t>(scale, 1);
	}

	void TextVideoMemBlitter::shutdown()
	{