//------------------------------------------------------------------------------
void GLMesh::Bind(GLShader* glShader) noexcept
{
auto vertexFormat = m_renderMesh->GetVertexFormat();
//TODO: This should be pre-calculated.
GLint maxVertexAttributes = 0;
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &maxVertexAttributes);
CS_ASSERT(u32(maxVertexAttributes) >= vertexFormat.GetNumElements(), "Too many vertex elements.");
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBufferHandle);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferHandle);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding GLMesh.");
for (u32 i = 0; i < vertexFormat.GetNumElements(); ++i)
{
glEnableVertexAttribArray(i);
auto elementType = vertexFormat.GetElement(i);
auto name = GLMeshUtils::GetAttributeName(elementType);
auto numComponents = ChilliSource::VertexFormat::GetNumComponents(elementType);
auto type = GLMeshUtils::GetGLType(ChilliSource::VertexFormat::GetDataType(elementType));
auto normalised = GLMeshUtils::IsNormalised(elementType);
auto offset = reinterpret_cast<const GLvoid*>(u64(vertexFormat.GetElementOffset(i)));
glShader->SetAttribute(name, numComponents, type, normalised, vertexFormat.GetSize(), offset);
}
for (s32 i = vertexFormat.GetNumElements(); i < maxVertexAttributes; ++i)
{
glDisableVertexAttribArray(i);
}
}
//---------------------------------------------------
//---------------------------------------------------
void TextureUnitSystem::Bind(GLenum in_type, const void* in_object, GLint in_handle, u32 in_unit)
{
if((s32)in_unit != m_currentTextureUnit)
{
m_currentTextureUnit = (s32)in_unit;
glActiveTexture(GL_TEXTURE0 + in_unit);
}
if(m_texUnits.empty() == true)
{
CSRendering::RenderCapabilities* renderCapabilities = CSCore::Application::Get()->GetSystem<CSRendering::RenderCapabilities>();
CS_ASSERT(renderCapabilities, "Cannot find required system: Render Capabilities.");
//Create the available texture unit slots
m_texUnits.resize(renderCapabilities->GetNumTextureUnits());
std::fill(m_texUnits.begin(), m_texUnits.end(), nullptr);
}
//Check to make sure this texture is not already bound to this unit
if(m_texUnits[in_unit] != in_object)
{
glBindTexture(in_type, in_handle);
m_texUnits[in_unit] = in_object;
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding texture to unit.");
}
//--------------------------------------------------
//--------------------------------------------------
void Texture::Destroy()
{
m_width = 0;
m_height = 0;
m_hasFilterModeChanged = true;
m_hasWrapModeChanged = true;
m_hasMipMaps = false;
m_filterMode = FilterMode::k_bilinear;
m_sWrapMode = WrapMode::k_clamp;
m_tWrapMode = WrapMode::k_clamp;
//If the context has already been destroyed then the cubemap has already been destroyed
bool hasContext = static_cast<RenderSystem*>(CSCore::Application::Get()->GetRenderSystem())->HasContext();
if(hasContext == true && m_texHandle > 0)
{
Unbind();
glDeleteTextures(1, &m_texHandle);
}
m_texHandle = 0;
#ifdef CS_TARGETPLATFORM_ANDROID
m_restoreTextureDataEnabled = false;
m_restorationDataSize = 0;
m_restorationData.reset();
#endif
CS_ASSERT_NOGLERROR("An OpenGL error occurred while destroying texture.");
}
//------------------------------------------------------------------------------
void GLShader::SetUniform(const std::string& name, const ChilliSource::Matrix4& value, FailurePolicy failurePolicy) noexcept
{
GLint uniformHandle = GetUniformHandle(name, failurePolicy);
if(uniformHandle >= 0)
{
glUniformMatrix4fv(uniformHandle, 1, GL_FALSE, reinterpret_cast<const GLfloat*>(&value.m));
CS_ASSERT_NOGLERROR("An OpenGL error occurred while setting uniform.");
}
}
//------------------------------------------------------------------------------
void GLShader::SetUniform(const std::string& name, const ChilliSource::Vector4* values, u32 numValues, FailurePolicy failurePolicy) noexcept
{
GLint uniformHandle = GetUniformHandle(name, failurePolicy);
if(uniformHandle >= 0)
{
glUniform4fv(uniformHandle, numValues, reinterpret_cast<const GLfloat*>(values));
CS_ASSERT_NOGLERROR("An OpenGL error occurred while setting uniform.");
}
}
//------------------------------------------------------------------------------
void GLShader::SetUniform(const std::string& name, f32 value, FailurePolicy failurePolicy) noexcept
{
GLint uniformHandle = GetUniformHandle(name, failurePolicy);
if(uniformHandle >= 0)
{
glUniform1f(uniformHandle, value);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while setting uniform.");
}
}
//------------------------------------------------------------------------------
void GLShader::SetAttribute(const std::string& name, GLint size, GLenum type, GLboolean isNormalised, GLsizei stride, const GLvoid* offset) noexcept
{
auto it = m_attributeHandles.find(name);
if(it == m_attributeHandles.end())
{
return;
}
glVertexAttribPointer(it->second, size, type, isNormalised, stride, offset);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while setting attribute.");
}
//------------------------------------------------------------------------------
GLTextureUnitManager::GLTextureUnitManager() noexcept
{
s32 numTextureUnits = 0;
glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &numTextureUnits);
m_boundTextures.reserve(numTextureUnits);
for (s32 i = 0; i < numTextureUnits; ++i)
{
m_boundTextures.push_back(nullptr);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while setting up the texture unit manager.");
}
//------------------------------------------------------------------------------
GLDynamicMesh::~GLDynamicMesh() noexcept
{
if(!m_invalidData)
{
glDeleteBuffers(1, &m_vertexBufferHandle);
if(m_indexBufferHandle != 0)
{
glDeleteBuffers(1, &m_indexBufferHandle);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while deleting GLDynamicMesh.");
}
}
//--------------------------------------------------
/// GL makes a copy of the data so we can just
/// let the incoming data delete itself
//--------------------------------------------------
void Texture::Build(const Descriptor& in_desc, TextureDataUPtr in_data, bool in_mipMap, bool in_restoreTextureDataEnabled)
{
Destroy();
m_width = in_desc.m_width;
m_height = in_desc.m_height;
m_format = in_desc.m_format;
m_compression = in_desc.m_compression;
CS_ASSERT(m_width <= m_renderCapabilities->GetMaxTextureSize() && m_height <= m_renderCapabilities->GetMaxTextureSize(),
"OpenGL does not support textures of this size on this device (" + CSCore::ToString(m_width) + ", " + CSCore::ToString(m_height) + ")");
glGenTextures(1, &m_texHandle);
Bind();
u8* data = in_data.get();
switch(m_compression)
{
case CSCore::ImageCompression::k_none:
UploadImageDataNoCompression(m_format, m_width, m_height, data);
break;
case CSCore::ImageCompression::k_ETC1:
UploadImageDataETC1(m_format, m_width, m_height, data, in_desc.m_dataSize);
break;
case CSCore::ImageCompression::k_PVR2Bpp:
UploadImageDataPVR2(m_format, m_width, m_height, data, in_desc.m_dataSize);
break;
case CSCore::ImageCompression::k_PVR4Bpp:
UploadImageDataPVR4(m_format, m_width, m_height, data, in_desc.m_dataSize);
break;
};
if(in_mipMap == true)
{
glGenerateMipmap(GL_TEXTURE_2D);
}
m_hasMipMaps = in_mipMap;
#ifdef CS_TARGETPLATFORM_ANDROID
if (GetStorageLocation() == CSCore::StorageLocation::k_none && in_restoreTextureDataEnabled == true)
{
m_restoreTextureDataEnabled = true;
m_restorationDataSize = in_desc.m_dataSize;
m_restorationData = std::move(in_data);
}
#endif
CS_ASSERT_NOGLERROR("An OpenGL error occurred while building texture.");
}
//-------------------------------------------------------
ChilliSource::RenderInfo RenderInfoFactory::CreateRenderInfo() noexcept
{
bool areHighPrecFragmentsSupported = true;
bool areMapBuffersSupported = true;
bool areVAOsSupported = true;
bool areDepthTexturesSupported = false;
bool areShadowMapsSupported = false;
u32 maxTextureSize = 0;
u32 maxTextureUnits = 0;
u32 maxVertexAttribs = 0;
#ifdef CS_OPENGLVERSION_ES
s32 fragmentHighRanges[2];
s32 fragmentHighPrecision;
glGetShaderPrecisionFormat(GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, fragmentHighRanges, &fragmentHighPrecision);
areHighPrecFragmentsSupported = fragmentHighPrecision != 0 && fragmentHighRanges[0] != 0 && fragmentHighRanges[1] != 0;
#ifdef CS_TARGETPLATFORM_ANDROID
//Check for map buffer support
areMapBuffersSupported = CheckForOpenGLExtension("GL_OES_mapbuffer");
areVAOsSupported = CheckForOpenGLExtension("GL_OES_vertex_array_object");
#endif
#ifdef CS_TARGETPLATFORM_RPI
areVAOsSupported = false;
#endif
#endif
#ifdef CS_OPENGLVERSION_STANDARD
areDepthTexturesSupported = CheckForOpenGLExtension("GL_ARB_depth_texture");
#elif defined(CS_OPENGLVERSION_ES)
areDepthTexturesSupported = CheckForOpenGLExtension("GL_OES_depth_texture");
#endif
areShadowMapsSupported = (areDepthTexturesSupported && areHighPrecFragmentsSupported);
glGetIntegerv(GL_MAX_TEXTURE_SIZE, (GLint*)&maxTextureSize);
glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, (GLint*)&maxTextureUnits);
glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, (GLint*)&maxVertexAttribs);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while getting render capabilities.");
ChilliSource::RenderInfo renderInfo(areShadowMapsSupported, areDepthTexturesSupported, areMapBuffersSupported, areVAOsSupported, areHighPrecFragmentsSupported, maxTextureSize, maxTextureUnits, maxVertexAttribs);
return renderInfo;
}
//------------------------------------------------------------------------------
GLuint GLTextureUnitManager::BindAdditional(const ChilliSource::RenderTexture* texture) noexcept
{
GLuint textureIndex = GetNextAvailableUnit();
m_boundTextures.push_back(texture);
auto glTexture = static_cast<GLTexture*>(texture->GetExtraData());
CS_ASSERT(glTexture, "Cannot bind a texture which hasn't been loaded.");
glActiveTexture(GL_TEXTURE0 + textureIndex);
glBindTexture(GL_TEXTURE_2D, glTexture->GetHandle());
glActiveTexture(GL_TEXTURE0);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding an additional texture.");
return textureIndex;
}
//-------------------------------------------------------
//-------------------------------------------------------
void TextureUnitSystem::Unbind(const void* in_object)
{
for(u32 i=0; i<m_texUnits.size(); ++i)
{
if(m_texUnits[i] == in_object)
{
//Unbind the texture from this slot by binding zero.
if((s32)i != m_currentTextureUnit)
{
m_currentTextureUnit = (s32)i;
glActiveTexture(GL_TEXTURE0 + i);
}
glBindTexture(GL_TEXTURE_2D, 0);
m_texUnits[i] = nullptr;
}
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while unbinding texture.");
}
//------------------------------------------------------------------------------
void GLDynamicMesh::Bind(GLShader* glShader, ChilliSource::PolygonType polygonType, const ChilliSource::VertexFormat& vertexFormat, ChilliSource::IndexFormat indexFormat, u32 numVertices, u32 numIndices,
const u8* vertexData, u32 vertexDataSize, const u8* indexData, u32 indexDataSize) noexcept
{
m_polygonType = polygonType;
m_vertexFormat = vertexFormat;
m_indexFormat = indexFormat;
m_numVertices = numVertices;
m_numIndices = numIndices;
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBufferHandle);
glBufferSubData(GL_ARRAY_BUFFER, 0, vertexDataSize, vertexData);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferHandle);
if (m_indexBufferHandle != 0)
{
glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, indexDataSize, indexData);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding GLDynamicMesh.");
ApplyVertexAttributes(glShader);
}
//------------------------------------------------------------------------------
void GLTextureUnitManager::Bind(const std::vector<const ChilliSource::RenderTexture*>& textures) noexcept
{
for (u32 textureUnitIndex = 0; textureUnitIndex < u32(textures.size()); ++textureUnitIndex)
{
if (m_boundTextures[textureUnitIndex] != textures[textureUnitIndex])
{
m_boundTextures[textureUnitIndex] = textures[textureUnitIndex];
auto glTexture = static_cast<GLTexture*>(m_boundTextures[textureUnitIndex]->GetExtraData());
CS_ASSERT(glTexture, "Cannot bind a texture which hasn't been loaded.");
CS_ASSERT(!glTexture->IsDataInvalid(), "GLTextureUnitManager::Bind(): Failed to bind texture, its context is invalid!");
glActiveTexture(GL_TEXTURE0 + textureUnitIndex);
glBindTexture(GL_TEXTURE_2D, glTexture->GetHandle());
}
}
glActiveTexture(GL_TEXTURE0);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding textures.");
}
//------------------------------------------------------------------------------
GLShader::~GLShader() noexcept
{
if(!m_invalidData)
{
if(m_vertexShaderId > 0)
{
glDetachShader(m_programId, m_vertexShaderId);
glDeleteShader(m_vertexShaderId);
}
if(m_fragmentShaderId > 0)
{
glDetachShader(m_programId, m_fragmentShaderId);
glDeleteShader(m_fragmentShaderId);
}
if(m_programId > 0)
{
glDeleteProgram(m_programId);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while destroying shader.");
}
}
//------------------------------------------------------------------------------
GLDynamicMesh::GLDynamicMesh(u32 vertexDataSize, u32 indexDataSize) noexcept
: m_allocator(k_allocatorSize), m_maxVertexDataSize(vertexDataSize), m_maxIndexDataSize(indexDataSize)
{
glGenBuffers(1, &m_vertexBufferHandle);
CS_ASSERT(m_vertexBufferHandle != 0, "Invalid vertex buffer.");
if(indexDataSize > 0)
{
glGenBuffers(1, &m_indexBufferHandle);
CS_ASSERT(m_indexBufferHandle != 0, "Invalid index buffer.");
}
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBufferHandle);
glBufferData(GL_ARRAY_BUFFER, m_maxVertexDataSize, nullptr, GL_DYNAMIC_DRAW);
if(indexDataSize > 0)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferHandle);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, m_maxIndexDataSize, nullptr, GL_DYNAMIC_DRAW);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while creating GLDynamicMesh.");
}
//------------------------------------------------------------------------------
void GLMesh::BuildMesh(const u8* vertexData, u32 vertexDataSize, const u8* indexData, u32 indexDataSize) noexcept
{
CS_ASSERT(vertexDataSize > 0 && vertexData, "Cannot build mesh with empty data");
glGenBuffers(1, &m_vertexBufferHandle);
CS_ASSERT(m_vertexBufferHandle != 0, "Invalid vertex buffer.");
if(indexData)
{
glGenBuffers(1, &m_indexBufferHandle);
CS_ASSERT(m_indexBufferHandle != 0, "Invalid index buffer.");
}
glBindBuffer(GL_ARRAY_BUFFER, m_vertexBufferHandle);
glBufferData(GL_ARRAY_BUFFER, vertexDataSize, vertexData, GL_STATIC_DRAW);
if(indexData)
{
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, m_indexBufferHandle);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indexDataSize, indexData, GL_STATIC_DRAW);
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while creating GLMesh.");
}
//------------------------------------------------------------------------------
GLint GLShader::GetUniformHandle(const std::string& name, FailurePolicy failurePolicy) noexcept
{
GLint uniformHandle = -1;
auto it = m_uniformHandles.find(name);
if(it != m_uniformHandles.end())
{
uniformHandle = it->second;
}
else
{
uniformHandle = glGetUniformLocation(m_programId, name.c_str());
CS_ASSERT_NOGLERROR("An OpenGL error occurred while getting uniform handle.");
m_uniformHandles.insert(std::make_pair(name, uniformHandle));
}
if (uniformHandle < 0 && failurePolicy == FailurePolicy::k_hard)
{
CS_LOG_FATAL("Cannot find shader uniform: " + name);
}
return uniformHandle;
}
//------------------------------------------------------------------------------
void GLShader::BuildAttributeHandleMap() noexcept
{
static const std::array<std::string, 6> attribNames =
{{
k_attributePosition,
k_attributeNormal,
k_attributeTexCoord,
k_attributeColour,
k_attributeWeights,
k_attributeJointIndices
}};
for(const auto& name : attribNames)
{
GLint handle = glGetAttribLocation(m_programId, name.c_str());
if(handle >= 0)
{
m_attributeHandles.insert(std::make_pair(name, handle));
}
}
CS_ASSERT_NOGLERROR("An OpenGL error occurred while populating attribute handles.");
}
//--------------------------------------------------
//--------------------------------------------------
void Texture::UpdateRestorationData()
{
CS_ASSERT(GetStorageLocation() == CSCore::StorageLocation::k_none, "Cannot update restoration data on texture that was loaded from file.");
if (m_restoreTextureDataEnabled == true)
{
Unbind();
//create an bind a new frame buffer.
GLuint frameBufferHandle = 0;
glGenFramebuffers(1, &frameBufferHandle);
glBindFramebuffer(GL_FRAMEBUFFER, frameBufferHandle);
//attach the texture
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texHandle, 0);
GLuint glCheck = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(glCheck != GL_FRAMEBUFFER_COMPLETE)
{
CS_LOG_FATAL("Framebuffer incomplete while updating texture restoration data.");
}
//read the data from the texture. This can only be read back in RGBA8888 format so it will need
//to be converted back to the format of the texture.
u32 unconvertedDataSize = GetWidth() * GetHeight() * 4;
std::unique_ptr<u8[]> unconvertedData(new u8[unconvertedDataSize]);
glReadPixels(0, 0, GetWidth(), GetHeight(), GL_RGBA, GL_UNSIGNED_BYTE, unconvertedData.get());
//Convert to the format of this texture
CSCore::ImageFormatConverter::ImageBuffer convertedData;
switch (m_format)
{
case CSCore::ImageFormat::k_RGBA8888:
convertedData.m_size = unconvertedDataSize;
convertedData.m_data = std::move(unconvertedData);
break;
case CSCore::ImageFormat::k_RGB888:
convertedData = CSCore::ImageFormatConverter::RGBA8888ToRGB888(unconvertedData.get(), unconvertedDataSize);
unconvertedData.reset();
break;
case CSCore::ImageFormat::k_RGBA4444:
convertedData = CSCore::ImageFormatConverter::RGBA8888ToRGBA4444(unconvertedData.get(), unconvertedDataSize);
unconvertedData.reset();
break;
case CSCore::ImageFormat::k_RGB565:
convertedData = CSCore::ImageFormatConverter::RGBA8888ToRGB565(unconvertedData.get(), unconvertedDataSize);
unconvertedData.reset();
break;
default:
CS_LOG_FATAL("Texture is not in a restorable format. The restorable texture data option must be disabled for this texture.");
break;
}
m_restorationDataSize = convertedData.m_size;
m_restorationData = std::move(convertedData.m_data);
//clean up the frame buffer.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDeleteFramebuffers(1, &frameBufferHandle);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while updating texture restoration data.");
}
}
//------------------------------------------------------------------------------
void GLShader::Bind() noexcept
{
glUseProgram(m_programId);
CS_ASSERT_NOGLERROR("An OpenGL error occurred while binding shader.");
}
