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preliminary, shitty, code for drawing the main window with OpenGL

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Arisotura
2019-05-16 00:30:55 +02:00
parent 256b8cb69c
commit f2725791d8
7 changed files with 392 additions and 6 deletions
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85
src/OpenGLSupport.cpp
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@ -28,3 +28,88 @@ bool OpenGL_Init()
return true;
}
bool OpenGL_BuildShaderProgram(const char* vs, const char* fs, GLuint* ids, const char* name)
{
int len;
int res;
ids[0] = glCreateShader(GL_VERTEX_SHADER);
len = strlen(vs);
glShaderSource(ids[0], 1, &vs, &len);
glCompileShader(ids[0]);
glGetShaderiv(ids[0], GL_COMPILE_STATUS, &res);
if (res != GL_TRUE)
{
glGetShaderiv(ids[0], GL_INFO_LOG_LENGTH, &res);
if (res < 1) res = 1024;
char* log = new char[res+1];
glGetShaderInfoLog(ids[0], res+1, NULL, log);
printf("OpenGL: failed to compile vertex shader %s: %s\n", name, log);
printf("shader source:\n--\n%s\n--\n", vs);
delete[] log;
glDeleteShader(ids[0]);
return false;
}
ids[1] = glCreateShader(GL_FRAGMENT_SHADER);
len = strlen(fs);
glShaderSource(ids[1], 1, &fs, &len);
glCompileShader(ids[1]);
glGetShaderiv(ids[1], GL_COMPILE_STATUS, &res);
if (res != GL_TRUE)
{
glGetShaderiv(ids[1], GL_INFO_LOG_LENGTH, &res);
if (res < 1) res = 1024;
char* log = new char[res+1];
glGetShaderInfoLog(ids[1], res+1, NULL, log);
printf("OpenGL: failed to compile fragment shader %s: %s\n", name, log);
//printf("shader source:\n--\n%s\n--\n", fs);
delete[] log;
glDeleteShader(ids[0]);
glDeleteShader(ids[1]);
return false;
}
ids[2] = glCreateProgram();
glAttachShader(ids[2], ids[0]);
glAttachShader(ids[2], ids[1]);
glLinkProgram(ids[2]);
glGetProgramiv(ids[2], GL_LINK_STATUS, &res);
if (res != GL_TRUE)
{
glGetProgramiv(ids[2], GL_INFO_LOG_LENGTH, &res);
if (res < 1) res = 1024;
char* log = new char[res+1];
glGetProgramInfoLog(ids[2], res+1, NULL, log);
printf("OpenGL: failed to link program %s: %s\n", name, log);
delete[] log;
glDeleteShader(ids[0]);
glDeleteShader(ids[1]);
glDeleteProgram(ids[2]);
return false;
}
return true;
}
void OpenGL_DeleteShaderProgram(GLuint* ids)
{
glDeleteShader(ids[0]);
glDeleteShader(ids[1]);
glDeleteProgram(ids[2]);
}
void OpenGL_UseShaderProgram(GLuint* ids)
{
glUseProgram(ids[2]);
}