NE_API drawing_shape_id create_quad_array() {
shapes.push_back(gl_drawing_shape());
drawing_shape_id shape_id = (drawing_shape_id) shapes.size() - 1;
gl_drawing_shape* quad = &shapes[shape_id];
gl_vertex_array* vertex_array = &quad->vertex_array;
create_vertex_array(vertex_array);
create_gl_buffer(&vertex_array->index_buffer);
create_gl_buffer(&vertex_array->vertex_buffer);
bind_vertex_array(vertex_array);
set_vertex_attribute(vertex_attribute::position, 4, sizeof(vertex), nullptr);
set_vertex_attribute(vertex_attribute::color, 4, sizeof(vertex), (void*) (4 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tangent, 3, sizeof(vertex), (void*) (8 * sizeof(float)));
set_vertex_attribute(vertex_attribute::normal, 3, sizeof(vertex), (void*) (11 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tex_coords, 2, sizeof(vertex), (void*) (14 * sizeof(float)));
return (drawing_shape_id) (shapes.size() - 1);
}
NE_API drawing_shape_id create_quad() {
shapes.push_back(gl_drawing_shape());
drawing_shape_id shape_id = (drawing_shape_id) shapes.size() - 1;
gl_drawing_shape* quad = &shapes[shape_id];
gl_vertex_array* vertex_array = &quad->vertex_array;
create_vertex_array(vertex_array);
quad->vertices.insert(quad->vertices.begin(), 4, vertex());
quad->indices = { 0, 1, 2, 3, 2, 0 };
quad->vertices[0].position = { 0.0f, 0.0f, 0.0f, 1.0f };
quad->vertices[1].position = { 1.0f, 0.0f, 0.0f, 1.0f };
quad->vertices[2].position = { 1.0f, 1.0f, 0.0f, 1.0f };
quad->vertices[3].position = { 0.0f, 1.0f, 0.0f, 1.0f };
quad->vertices[0].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[1].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[2].color = { 1.0f, 1.0f, 1.0f, 1.0f };
quad->vertices[3].color = { 1.0f, 1.0f, 1.0f, 1.0f };
vertex_array->index_count = 6;
create_gl_buffer(&vertex_array->index_buffer);
set_gl_buffer_memory(&vertex_array->index_buffer, (uint8*) &quad->indices[0], 6 * sizeof(uint32));
upload_gl_buffer_data(&vertex_array->index_buffer);
create_gl_buffer(&vertex_array->vertex_buffer);
set_gl_buffer_memory(&vertex_array->vertex_buffer, (uint8*) &quad->vertices[0], 4 * sizeof(vertex));
set_quad_tex_coords(shape_id, 0.0f, 0.0f, 1.0f, 1.0f);
bind_vertex_array(vertex_array);
set_vertex_attribute(vertex_attribute::position, 4, sizeof(vertex), nullptr);
set_vertex_attribute(vertex_attribute::color, 4, sizeof(vertex), (void*) (4 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tangent, 3, sizeof(vertex), (void*) (8 * sizeof(float)));
set_vertex_attribute(vertex_attribute::normal, 3, sizeof(vertex), (void*) (11 * sizeof(float)));
set_vertex_attribute(vertex_attribute::tex_coords, 2, sizeof(vertex), (void*) (14 * sizeof(float)));
return (drawing_shape_id) (shapes.size() - 1);
}
int push_gl_srv_buffer(struct gl_buffer *gl_buffer)
{
struct gl_srv_buffer *self =
b6_cast_of(gl_buffer, struct gl_srv_buffer, gl_buffer);
float *p, *q;
static const unsigned long int min_size = 32768;
unsigned long int v_size = b6_array_memsize(&gl_buffer->v);
unsigned long int t_size = b6_array_memsize(&gl_buffer->t);
unsigned long int size = v_size + t_size;
unsigned long int len = b6_array_length(&gl_buffer->t);
unsigned long int max = gl_buffer->t.capacity;
const float *v = b6_array_get(&gl_buffer->v, 0);
const float *t = b6_array_get(&gl_buffer->t, 0);
if (size < v_size || size < t_size) {
log_e("integer overflow");
return -2;
}
if (size < min_size)
size = min_size;
if (size > self->size) {
log_i("allocating %u bytes", size);
self->size = size;
if (self->id) {
maybe_unbind_gl_buffer(self->id);
destroy_gl_buffer(self->id);
}
create_gl_buffer(&self->id);
maybe_bind_gl_buffer(self->id);
alloc_gl_buffer(size);
}
log_i("pushing %u/%u vertices", len, max);
p = map_gl_buffer();
q = p + max * 2;
while (len--) { *p++ = *t++; *p++ = *t++; *q++ = *v++; *q++ = *v++; }
unmap_gl_buffer();
glTexCoordPointer(2, GL_FLOAT, 0, NULL);
glVertexPointer(2, GL_FLOAT, 0, ((float*)NULL) + max * 2);
return 0;
}
