shithub: tinygl

ref: b0e4642366a76e49553afa9947715ba0cc0c07a6
dir: /src/get.c/

#include "zgl.h"

void glGetIntegerv(GLint pname, GLint* params) {
	GLContext* c = gl_get_context();

	switch (pname) {
	case GL_VIEWPORT:
		params[0] = c->viewport.xmin;
		params[1] = c->viewport.ymin;
		params[2] = c->viewport.xsize;
		params[3] = c->viewport.ysize;
		break;
	case GL_MAX_MODELVIEW_STACK_DEPTH:
		*params = MAX_MODELVIEW_STACK_DEPTH;
		break;
	case GL_MAX_PROJECTION_STACK_DEPTH:
		*params = MAX_PROJECTION_STACK_DEPTH;
		break;
	case GL_MAX_LIGHTS:
		*params = MAX_LIGHTS;
		break;
	case GL_MAX_TEXTURE_SIZE:
		*params = 256; /* not completely true, but... */
		break;
	case GL_MAX_TEXTURE_STACK_DEPTH:
		*params = MAX_TEXTURE_STACK_DEPTH;
		break;
	default:
		gl_fatal_error("glGet: option not implemented");
		break;
	}
}

void glGetFloatv(GLint pname, GLfloat* v) {
	GLint i;
	GLint mnr = 0; /* just a trick to return the correct matrix */
	GLContext* c = gl_get_context();
	switch (pname) {
	case GL_TEXTURE_MATRIX:
		mnr++;
	case GL_PROJECTION_MATRIX:
		mnr++;
	case GL_MODELVIEW_MATRIX: {
		GLfloat* p = &c->matrix_stack_ptr[mnr]->m[0][0];
		;
		for (i = 0; i < 4; i++) {
			*v++ = p[0];
			*v++ = p[4];
			*v++ = p[8];
			*v++ = p[12];
			p++;
		}
	} break;
	case GL_LINE_WIDTH:
		*v = 1.0f;
		break;
	case GL_LINE_WIDTH_RANGE:
		v[0] = v[1] = 1.0f;
		break;
	case GL_POINT_SIZE:
		*v = 1.0f;
		break;
	case GL_POINT_SIZE_RANGE:
		v[0] = v[1] = 1.0f;
	default:
		fprintf(stderr, "warning: unknown pname in glGetFloatv()\n");
		break;
	}
}