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Adds border colour output.

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This commit is contained in:
Thomas Harte 2017-11-27 22:05:40 -05:00
parent dbb14ea2e2
commit c558e86e03
2 changed files with 64 additions and 12 deletions
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72
Components/9918/9918.cpp
View File

@ -10,12 +10,48 @@
using namespace TI;
namespace {
const uint32_t palette_pack(uint8_t r, uint8_t g, uint8_t b) {
uint32_t result = 0;
uint8_t *result_ptr = reinterpret_cast<uint8_t *>(&result);
result_ptr[0] = r;
result_ptr[1] = g;
result_ptr[2] = b;
result_ptr[3] = 0;
return result;
}
const uint32_t palette[16] = {
palette_pack(0, 0, 0),
palette_pack(0, 0, 0),
palette_pack(90, 201, 81),
palette_pack(149, 231, 133),
palette_pack(113, 104, 183),
palette_pack(146, 132, 255),
palette_pack(200, 114, 89),
palette_pack(115, 222, 255),
palette_pack(238, 124, 90),
palette_pack(255, 166, 132),
palette_pack(219, 232, 92),
palette_pack(240, 247, 143),
palette_pack(78, 176, 63),
palette_pack(202, 118, 216),
palette_pack(233, 233, 233),
palette_pack(255, 255, 255)
};
}
TMS9918::TMS9918(Personality p) :
crt_(new Outputs::CRT::CRT(342, 1, Outputs::CRT::DisplayType::NTSC60, 4)) {
crt_->set_rgb_sampling_function(
"vec3 rgb_sample(usampler2D sampler, vec2 coordinate, vec2 icoordinate)"
"{"
"return texture(sampler, coordinate).rgb;"
"return texture(sampler, coordinate).rgb / vec3(255.0);"
"}");
}
@ -51,17 +87,23 @@ void TMS9918::run_for(const HalfCycles cycles) {
output_column_ = 26;
}
// TODO: colour burst.
if(output_column_ == 26 && column_ >= 69) { // TODO: modes other than text
crt_->output_blank(static_cast<unsigned int>(69 - 26));
output_column_ = 69;
pixel_target_ = crt_->allocate_write_area(256);
if(output_column_ >= 26) { // TODO: modes other than text
int pixels_end = std::min(69, column_);
if(output_column_ < pixels_end) {
output_border(static_cast<unsigned int>(pixels_end - output_column_));
output_column_ = pixels_end;
if(pixels_end == 69) {
pixel_target_ = reinterpret_cast<uint32_t *>(crt_->allocate_write_area(256));
}
}
}
if(output_column_ >= 69) {
int pixels_end = std::min(309, column_);
if(output_column_ < pixels_end) {
while(output_column_ < pixels_end) { // TODO: modes other than text
pixel_target_[0] = pixel_target_[1] = pixel_target_[2] = pixel_target_[3] = 0xff;
pixel_target_ += 4;
pixel_target_[0] = 0xff;
pixel_target_ ++;
output_column_ ++;
}
@ -70,8 +112,9 @@ void TMS9918::run_for(const HalfCycles cycles) {
}
}
}
if(column_ == 342) {
crt_->output_blank(static_cast<unsigned int>(342 - 309));
if(column_ >= 309) {
output_border(static_cast<unsigned int>(column_ - output_column_));
output_column_ = column_;
}
} else if(row_ >= 227 && row_ < 230) { // TODO: don't hard-code NTSC.
// Vertical sync.
@ -84,8 +127,9 @@ void TMS9918::run_for(const HalfCycles cycles) {
crt_->output_sync(static_cast<unsigned int>(26));
output_column_ = 26;
}
if(column_ == 342) {
crt_->output_blank(static_cast<unsigned int>(342 - 26));
if(column_ >= 26) {
output_border(column_ - output_column_);
output_column_ = column_;
}
}
@ -98,6 +142,12 @@ void TMS9918::run_for(const HalfCycles cycles) {
}
}
void TMS9918::output_border(int cycles) {
pixel_target_ = reinterpret_cast<uint32_t *>(crt_->allocate_write_area(1));
if(pixel_target_) *pixel_target_ = palette[background_colour_];
crt_->output_level(static_cast<unsigned int>(cycles));
}
// TODO: as a temporary development measure, memory access below is magically instantaneous. Correct that.
void TMS9918::set_register(int address, uint8_t value) {

4
Components/9918/9918.hpp
View File

@ -70,7 +70,9 @@ class TMS9918 {
int column_ = 0, row_ = 0, output_column_ = 0;
int cycles_error_ = 0;
uint8_t *pixel_target_ = nullptr;
uint32_t *pixel_target_ = nullptr;
void output_border(int cycles);
};
};