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Continue adding opengl font support.

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This commit is contained in:
James Grogan 2022-11-15 15:50:36 +00:00
parent 649079a5c7
commit eef93efc29
37 changed files with 530 additions and 157 deletions
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68
src/graphics/opengl/OpenGlShaderProgram.cpp Normal file
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#include "OpenGlShaderProgram.h"
#include "File.h"
#include "FileLogger.h"
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glu.h>
OpenGlShaderProgram::OpenGlShaderProgram(const Path& vertShaderPath, const Path& fragShaderPath)
{
const auto vert_shader_source = File(vertShaderPath).read();
const auto frag_shader_source = File(fragShaderPath).read();
unsigned int vertexShader = glCreateShader(GL_VERTEX_SHADER);
const char* vert_source = vert_shader_source.c_str();
glShaderSource(vertexShader, 1, &vert_source, nullptr);
glCompileShader(vertexShader);
int success;
char infoLog[512];
glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
if(!success)
{
glGetShaderInfoLog(vertexShader, 512, nullptr, infoLog);
MLOG_ERROR("ERROR::SHADER::VERTEX::COMPILATION_FAILED: " << infoLog);
if (auto errCode = glGetError(); errCode != GL_NO_ERROR)
{
auto errString = gluErrorString(errCode);
MLOG_ERROR("Got gl error " << errString);
}
}
unsigned int fragmentShader;
fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
const char* frag_source = frag_shader_source.c_str();
glShaderSource(fragmentShader, 1, &frag_source, nullptr);
glCompileShader(fragmentShader);
glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
if(!success)
{
glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
MLOG_ERROR("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED: " << infoLog);
}
mHandle = glCreateProgram();
glAttachShader(mHandle, vertexShader);
glAttachShader(mHandle, fragmentShader);
glLinkProgram(mHandle);
glGetProgramiv(mHandle, GL_LINK_STATUS, &success);
if(!success)
{
glGetProgramInfoLog(mHandle, 512, NULL, infoLog);
MLOG_ERROR("Shader linking FAILED: " << infoLog);
}
glDeleteShader(vertexShader);
glDeleteShader(fragmentShader);
}
unsigned int OpenGlShaderProgram::getHandle() const
{
return mHandle;
}