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Offers a less error-prone route to attribute binding.

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This commit is contained in:
Thomas Harte 2019-01-25 21:56:55 -05:00 committed by Thomas Harte
parent 73e32a9c76
commit 85ad490089
3 changed files with 38 additions and 14 deletions
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14
Outputs/OpenGL/Primitives/Shader.cpp
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@ -46,6 +46,20 @@ GLuint Shader::compile_shader(const std::string &source, GLenum type) {
} }
Shader::Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings) { Shader::Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings) {
init(vertex_shader, fragment_shader, attribute_bindings);
}
Shader::Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<std::string> &binding_names) {
std::vector<AttributeBinding> bindings;
GLuint index = 0;
for(const auto &name: binding_names) {
bindings.emplace_back(name, index);
++index;
}
init(vertex_shader, fragment_shader, bindings);
}
void Shader::init(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings) {
shader_program_ = glCreateProgram(); shader_program_ = glCreateProgram();
const GLuint vertex = compile_shader(vertex_shader, GL_VERTEX_SHADER); const GLuint vertex = compile_shader(vertex_shader, GL_VERTEX_SHADER);
const GLuint fragment = compile_shader(fragment_shader, GL_FRAGMENT_SHADER); const GLuint fragment = compile_shader(fragment_shader, GL_FRAGMENT_SHADER);

10
Outputs/OpenGL/Primitives/Shader.hpp
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@ -34,6 +34,7 @@ public:
}; };
struct AttributeBinding { struct AttributeBinding {
AttributeBinding(const std::string &name, GLuint index) : name(name), index(index) {}
const std::string name; const std::string name;
const GLuint index; const GLuint index;
}; };
@ -45,6 +46,13 @@ public:
@param attribute_bindings A vector of attribute bindings. @param attribute_bindings A vector of attribute bindings.
*/ */
Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings = {}); Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings = {});
/*!
Attempts to compile a shader, throwing @c VertexShaderCompilationError, @c FragmentShaderCompilationError or @c ProgramLinkageError upon failure.
@param vertex_shader The vertex shader source code.
@param fragment_shader The fragment shader source code.
@param binding_names A list of attributes to generate bindings for; these will be given indices 0...n-1.
*/
Shader(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<std::string> &binding_names);
~Shader(); ~Shader();
/*! /*!
@ -109,6 +117,8 @@ public:
void set_uniform_matrix(const std::string &name, GLint size, GLsizei count, bool transpose, const GLfloat *values); void set_uniform_matrix(const std::string &name, GLint size, GLsizei count, bool transpose, const GLfloat *values);
private: private:
void init(const std::string &vertex_shader, const std::string &fragment_shader, const std::vector<AttributeBinding> &attribute_bindings);
GLuint compile_shader(const std::string &source, GLenum type); GLuint compile_shader(const std::string &source, GLenum type);
GLuint shader_program_; GLuint shader_program_;

28
Outputs/OpenGL/ScanTargetGLSLFragments.cpp
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@ -179,12 +179,12 @@ std::unique_ptr<Shader> ScanTarget::composition_shader() const {
vertex_shader, vertex_shader,
fragment_shader + "}", fragment_shader + "}",
{ {
{"startDataX", 0}, "startDataX",
{"startClock", 1}, "startClock",
{"endDataX", 2}, "endDataX",
{"endClock", 3}, "endClock",
{"dataY", 4}, "dataY",
{"lineY", 5}, "lineY",
} }
)); ));
} }
@ -491,14 +491,14 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
vertex_shader, vertex_shader,
fragment_shader, fragment_shader,
{ {
{"startPoint", 0}, "startPoint",
{"endPoint", 1}, "endPoint",
{"startClock", 2}, "startClock",
{"endClock", 3}, "endClock",
{"lineY", 4}, "lineY",
{"lineCompositeAmplitude", 5}, "lineCompositeAmplitude",
{"startCompositeAngle", 6}, "startCompositeAngle",
{"endCompositeAngle", 7}, "endCompositeAngle"
} }
); );