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Use same shader instance for all labeldrawables

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This commit is contained in:
Georg Hagen
2025-01-03 22:23:24 +01:00
parent b866f5ac46
commit 61fa1546a0
2 changed files with 46 additions and 39 deletions
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60
openVulkanoCpp/Scene/Prefabs/LabelDrawable.cpp
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@@ -15,16 +15,42 @@ namespace OpenVulkano::Scene
{
using namespace Math;
LabelDrawable::LabelDrawable(const std::shared_ptr<AtlasData>& atlasData, const LabelDrawableSettings& settings,
bool isBillboard)
: Drawable(DrawEncoder::GetDrawEncoder<LabelDrawable>(), DrawPhase::MAIN)
namespace
{
Shader MakeLabelBgShader(bool billboard)
{
Shader backgroundShader;
if (!billboard)
{
backgroundShader.AddShaderProgram(ShaderProgramType::VERTEX, "Shader/label");
}
else
{
backgroundShader.AddShaderProgram(ShaderProgramType::VERTEX, "Shader/labelBillboard");
// binding for billboard's buffer
DescriptorSetLayoutBinding binding = UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING;
binding.stageFlags = ShaderProgramType::Type::VERTEX;
backgroundShader.AddDescriptorSetLayoutBinding(binding, 4);
}
backgroundShader.AddShaderProgram(ShaderProgramType::FRAGMENT, "Shader/label");
backgroundShader.AddDescriptorSetLayoutBinding(Texture::DESCRIPTOR_SET_LAYOUT_BINDING, 2);
backgroundShader.AddDescriptorSetLayoutBinding(UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING, 5);
backgroundShader.topology = Topology::TRIANGLE_STRIP;
backgroundShader.cullMode = CullMode::NONE;
return backgroundShader;
}
}
Shader LabelDrawable::BACKGROUND_SHADER = MakeLabelBgShader(false);
Shader LabelDrawable::BACKGROUND_BILLBOARD_SHADER = MakeLabelBgShader(true);
LabelDrawable::LabelDrawable(const std::shared_ptr<AtlasData>& atlasData, const LabelDrawableSettings& settings, bool isBillboard)
: Drawable(DrawEncoder::GetDrawEncoder<LabelDrawable>(), DrawPhase::MAIN), m_atlasData(atlasData), m_isBillboard(isBillboard)
{
if (atlasData->glyphs.empty() || !atlasData->texture.size)
{
throw std::runtime_error("Can't create label drawable. Either glyphs or texture is empty");
}
m_atlasData = atlasData;
m_isBillboard = isBillboard;
SetLabelSettings(settings);
SetupShaders();
SetupBuffers();
@@ -43,10 +69,7 @@ namespace OpenVulkano::Scene
void LabelDrawable::AddText(const std::string& text, const TextConfig& config)
{
if (text.empty())
{
return;
}
if (text.empty()) return;
TextDrawable& textDrawable = m_texts.emplace_back(m_atlasData, config);
// do not render glyph's background
@@ -104,24 +127,7 @@ namespace OpenVulkano::Scene
void LabelDrawable::SetupShaders()
{
if (!m_isBillboard)
{
m_backgroundShader.AddShaderProgram(OpenVulkano::ShaderProgramType::VERTEX, "Shader/label");
}
else
{
m_backgroundShader.AddShaderProgram(OpenVulkano::ShaderProgramType::VERTEX, "Shader/labelBillboard");
// binding for billboard's buffer
DescriptorSetLayoutBinding binding = UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING;
binding.stageFlags = ShaderProgramType::Type::VERTEX;
m_backgroundShader.AddDescriptorSetLayoutBinding(binding, 4);
}
m_backgroundShader.AddShaderProgram(OpenVulkano::ShaderProgramType::FRAGMENT, "Shader/label");
m_backgroundShader.AddDescriptorSetLayoutBinding(Texture::DESCRIPTOR_SET_LAYOUT_BINDING, 2);
m_backgroundShader.AddDescriptorSetLayoutBinding(UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING, 5);
m_backgroundShader.topology = Topology::TRIANGLE_STRIP;
m_backgroundShader.cullMode = CullMode::NONE;
SetShader(&m_backgroundShader);
SetShader(IsBillboard() ? &BACKGROUND_BILLBOARD_SHADER : &BACKGROUND_SHADER);
FontAtlasType fontAtlasType(static_cast<FontAtlasType::Type>(m_atlasData->meta.atlasType));
if (!m_isBillboard)