Class: Retrograph::VDU
- Inherits:
-
Object
- Object
- Retrograph::VDU
- Defined in:
- ext/retrograph/retrograph.c
Instance Method Summary collapse
- #initialize_copy(from) ⇒ Object
- #wait_scanlines(n_scanlines_r) ⇒ Object
- #write(start_address_r, data_r) ⇒ Object
- #write_byte(start_address_r, byte_r) ⇒ Object
Instance Method Details
#initialize_copy(from) ⇒ Object
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# File 'ext/retrograph/retrograph.c', line 150
static VALUE vdu_initialize_copy(VALUE self, VALUE from) {
vdu_wrapper_t *vdu;
vdu_wrapper_t *from_vdu;
if (CLASS_OF(self) != CLASS_OF(from)) {
rb_raise(rb_eTypeError, "Mismatched class for copy");
}
Data_Get_Struct(self, vdu_wrapper_t, vdu);
Data_Get_Struct(from, vdu_wrapper_t, from_vdu);
retrograph_clone(vdu->vdu, from_vdu->vdu);
check_errors(vdu->vdu);
return Qnil;
}
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#wait_scanlines(n_scanlines_r) ⇒ Object
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# File 'ext/retrograph/retrograph.c', line 187
static VALUE vdu_render_scanlines(VALUE self, VALUE n_scanlines_r) {
vdu_wrapper_t *vdu;
surface_header_t *surface;
uint8_t *current_line;
int max_scanline;
Data_Get_Struct(self, vdu_wrapper_t, vdu);
if (vdu->scanline == NOT_IN_FRAME) {
return Qnil;
}
surface = get_rubysdl_surface(vdu->surface);
max_scanline = (int)NUM2UINT(n_scanlines_r) + vdu->scanline;
if (max_scanline > RETROGRAPH_DISPLAY_HEIGHT) {
max_scanline = RETROGRAPH_DISPLAY_HEIGHT;
}
current_line = (uint8_t *)surface->pixels +
vdu->scanline * surface->pitch * 2;
for (; vdu->scanline < max_scanline; vdu->scanline++) {
uint8_t *output;
uint8_t const *input;
retrograph_render_scanline_2x(vdu->vdu, current_line,
RETROGRAPH_DISPLAY_WIDTH *
RETROGRAPH_BYTES_PER_PIXEL * 2);
check_errors(vdu->vdu);
memcpy(current_line + surface->pitch, current_line,
RETROGRAPH_DISPLAY_WIDTH * RETROGRAPH_BYTES_PER_PIXEL * 2);
current_line += surface->pitch * 2;
}
return Qnil;
}
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#write(start_address_r, data_r) ⇒ Object
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# File 'ext/retrograph/retrograph.c', line 163
static VALUE vdu_write(VALUE self, VALUE start_address_r, VALUE data_r) {
vdu_wrapper_t *vdu;
retrograph_addr_t start_address;
Check_Type(data_r, T_STRING);
Data_Get_Struct(self, vdu_wrapper_t, vdu);
start_address = (retrograph_addr_t)NUM2INT(start_address_r);
retrograph_write(vdu->vdu, start_address, RSTRING_PTR(data_r),
(size_t)RSTRING_LEN(data_r));
check_errors(vdu->vdu);
return Qnil;
}
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#write_byte(start_address_r, byte_r) ⇒ Object
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# File 'ext/retrograph/retrograph.c', line 175
static VALUE vdu_write_byte(VALUE self, VALUE start_address_r, VALUE byte_r) {
vdu_wrapper_t *vdu;
uint8_t byte;
retrograph_addr_t start_address;
Data_Get_Struct(self, vdu_wrapper_t, vdu);
start_address = (retrograph_addr_t)NUM2INT(start_address_r);
byte = (uint8_t)NUM2INT(byte_r);
retrograph_write(vdu->vdu, start_address, &byte, 1);
check_errors(vdu->vdu);
return Qnil;
}
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