6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-11-26 08:49:37 +00:00
Code Issues Projects Releases Wiki Activity

Ensures I get some sort of feedback for non-text modes.

Browse Source
This commit is contained in:
Thomas Harte 2020-11-15 17:16:52 -05:00
parent cdacf280e1
commit 68ba73bee0
2 changed files with 48 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
Machines/Apple/AppleIIgs/Video.cpp
View File

@ -180,25 +180,17 @@ void VideoBase::output_row(int row, int start, int end) {
next_pixel_ = pixels_ = reinterpret_cast<uint16_t *>(crt_.begin_data(640, 2));
}
// TODO: support modes other than 40-column text.
if(next_pixel_) {
uint16_t row_address = get_row_address(row);
for(int c = start; c < end_of_period; c++) {
const uint8_t source = ram_[row_address + c - start_of_pixels];
const int character = source & character_zones_[source >> 6].address_mask;
const uint8_t xor_mask = character_zones_[source >> 6].xor_mask;
const std::size_t character_address = size_t(character << 3) + (row & 7);
const uint8_t character_pattern = character_rom_[character_address] ^ xor_mask;
const uint16_t colours[2] = {background_colour_, text_colour_};
const int window_start = start - start_of_pixels;
const int window_end = end_of_period - start_of_pixels;
next_pixel_[0] = colours[(character_pattern & 0x40) >> 6];
next_pixel_[1] = colours[(character_pattern & 0x20) >> 5];
next_pixel_[2] = colours[(character_pattern & 0x10) >> 4];
next_pixel_[3] = colours[(character_pattern & 0x08) >> 3];
next_pixel_[4] = colours[(character_pattern & 0x04) >> 2];
next_pixel_[5] = colours[(character_pattern & 0x02) >> 1];
next_pixel_[6] = colours[(character_pattern & 0x01) >> 0];
next_pixel_ += 7;
if(new_video_ & 0x80) {
next_pixel_ = output_super_high_res(next_pixel_, window_start, window_end, row);
} else {
next_pixel_ = output_text(next_pixel_, window_start, window_end, row);
// TODO: support modes other than 40-column text.
if(graphics_mode(row) != Apple::II::GraphicsMode::Text) printf("Outputting incorrect graphics mode!\n");
}
}
@ -293,3 +285,39 @@ void VideoBase::set_composite_is_colour(bool) {
bool VideoBase::get_composite_is_colour() {
return true;
}
// MARK: - Outputters.
uint16_t *VideoBase::output_text(uint16_t *target, int start, int end, int row) const {
uint16_t row_address = get_row_address(row);
for(int c = start; c < end; c++) {
const uint8_t source = ram_[row_address + c];
const int character = source & character_zones_[source >> 6].address_mask;
const uint8_t xor_mask = character_zones_[source >> 6].xor_mask;
const std::size_t character_address = size_t(character << 3) + (row & 7);
const uint8_t character_pattern = character_rom_[character_address] ^ xor_mask;
const uint16_t colours[2] = {background_colour_, text_colour_};
target[0] = colours[(character_pattern & 0x40) >> 6];
target[1] = colours[(character_pattern & 0x20) >> 5];
target[2] = colours[(character_pattern & 0x10) >> 4];
target[3] = colours[(character_pattern & 0x08) >> 3];
target[4] = colours[(character_pattern & 0x04) >> 2];
target[5] = colours[(character_pattern & 0x02) >> 1];
target[6] = colours[(character_pattern & 0x01) >> 0];
target += 7;
}
return target;
}
uint16_t *VideoBase::output_super_high_res(uint16_t *target, int start, int end, int row [[maybe_unused]]) const {
for(int c = start; c < end; c++) {
// TODO!
target[0] = 0x0000;
target[1] = 0xffff;
target += 2;
}
return target;
}

3
Machines/Apple/AppleIIgs/Video.hpp
View File

@ -77,6 +77,9 @@ class VideoBase: public Apple::II::VideoSwitches<Cycles> {
uint16_t *pixels_ = nullptr, *next_pixel_ = nullptr;
void output_row(int row, int start, int end);
uint16_t *output_super_high_res(uint16_t *target, int start, int end, int row) const;
uint16_t *output_text(uint16_t *target, int start, int end, int row) const;
};
class Video: public VideoBase {