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Fix typos
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@ -280,7 +280,7 @@ template <class BusHandler, bool is_iie> class Video: public VideoBase {
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if(is_vertical_sync_line) {
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if(is_vertical_sync_line) {
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// In effect apply an XOR to HSYNC and VSYNC flags in order to include equalising
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// In effect apply an XOR to HSYNC and VSYNC flags in order to include equalising
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// pulses (and hencce keep hsync approximately where it should be during vsync).
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// pulses (and hence keep hsync approximately where it should be during vsync).
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const int blank_start = std::max(first_sync_column - sync_length, column_);
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const int blank_start = std::max(first_sync_column - sync_length, column_);
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const int blank_end = std::min(first_sync_column, ending_column);
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const int blank_end = std::min(first_sync_column, ending_column);
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if(blank_end > blank_start) {
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if(blank_end > blank_start) {
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@ -36,7 +36,7 @@
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.b = 0.5 + 0.5 * chrominance * sin(phase)
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.b = 0.5 + 0.5 * chrominance * sin(phase)
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Contents of the composition buffer are then drawn into the finalised line texture; at this point a suitable
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Contents of the composition buffer are then drawn into the finalised line texture; at this point a suitable
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low-filter is applied to the two chrominance channels, colours are converted to RGB and gamma corrected.
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low-pass filter is applied to the two chrominance channels, colours are converted to RGB and gamma corrected.
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Contents from the finalised line texture are then painted to the display.
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Contents from the finalised line texture are then painted to the display.
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@ -54,7 +54,7 @@
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[aside: upfront calculation of cos/sin is just because it'll need to be calculated at this precision anyway,
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[aside: upfront calculation of cos/sin is just because it'll need to be calculated at this precision anyway,
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and doing it here avoids having to do unit<->radian conversions on phase alone]
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and doing it here avoids having to do unit<->radian conversions on phase alone]
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Contents of the composition buffer are transferred to the separated-luma buffer, subject to a low-paass filter
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Contents of the composition buffer are transferred to the separated-luma buffer, subject to a low-pass filter
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that has sought to separate luminance and chrominance, and with phase and amplitude now baked into the latter:
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that has sought to separate luminance and chrominance, and with phase and amplitude now baked into the latter:
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.r = luminance
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.r = luminance
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@ -220,7 +220,7 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
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// Textures: the stencil.
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// Textures: the stencil.
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//
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//
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// Scan targets recceive scans, not full frames. Those scans may not cover the entire display,
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// Scan targets receive scans, not full frames. Those scans may not cover the entire display,
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// either because unlit areas have been omitted or because a sync discrepancy means that the full
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// either because unlit areas have been omitted or because a sync discrepancy means that the full
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// potential vertical or horizontal width of the display isn't used momentarily.
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// potential vertical or horizontal width of the display isn't used momentarily.
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//
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//
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@ -249,8 +249,8 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
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/// from which lines are painted to the frame buffer.
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/// from which lines are painted to the frame buffer.
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CompositeColour
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CompositeColour
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// TODO: decide what to do for downard-scaled direct-to-display. Obvious options are to include lowpass
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// TODO: decide what to do for downward-scaled direct-to-display. Obvious options are to include lowpass
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// filtering into the scan outputter and contine hoping that the vertical takes care of itself, or maybe
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// filtering into the scan outputter and continue hoping that the vertical takes care of itself, or maybe
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// to stick with DirectToDisplay but with a minimum size for the frame buffer and apply filtering from
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// to stick with DirectToDisplay but with a minimum size for the frame buffer and apply filtering from
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// there to the screen.
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// there to the screen.
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};
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};
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@ -448,7 +448,7 @@ using BufferingScanTarget = Outputs::Display::BufferingScanTarget;
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[self copyTexture:_oldFrameBuffer to:_frameBuffer];
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[self copyTexture:_oldFrameBuffer to:_frameBuffer];
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} else {
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} else {
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// TODO: this use of clearTexture is the only reasn _frameBuffer has a marked usage of MTLTextureUsageShaderWrite;
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// TODO: this use of clearTexture is the only reasn _frameBuffer has a marked usage of MTLTextureUsageShaderWrite;
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// it'd probably be smarter to blank it with geometry rather than potentially complicating
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// it'd probably be smarter to blank it with geometry rather than potentially complicating
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// its storage further?
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// its storage further?
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[self clearTexture:_frameBuffer];
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[self clearTexture:_frameBuffer];
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}
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}
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@ -199,7 +199,7 @@ Outputs::Display::ScanTarget::Scan::EndPoint CRT::end_point(uint16_t data_offset
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// Ensure .composite_angle is sampled at the location indicated by .cycles_since_end_of_horizontal_retrace.
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// Ensure .composite_angle is sampled at the location indicated by .cycles_since_end_of_horizontal_retrace.
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// TODO: I could supply time_multiplier_ as a modal and just not round .cycles_since_end_of_horizontal_retrace. Would that be better?
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// TODO: I could supply time_multiplier_ as a modal and just not round .cycles_since_end_of_horizontal_retrace. Would that be better?
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const auto lost_precision = cycles_since_horizontal_sync_ % time_multiplier_;
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const auto lost_precision = cycles_since_horizontal_sync_ % time_multiplier_;
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end_point.composite_angle = int16_t(((phase_numerator_ - lost_precision * colour_cycle_numerator_) << 6) / phase_denominator_) * (is_alernate_line_ ? -1 : 1);
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end_point.composite_angle = int16_t(((phase_numerator_ - lost_precision * colour_cycle_numerator_) << 6) / phase_denominator_) * (is_alternate_line_ ? -1 : 1);
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end_point.cycles_since_end_of_horizontal_retrace = uint16_t(cycles_since_horizontal_sync_ / time_multiplier_);
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end_point.cycles_since_end_of_horizontal_retrace = uint16_t(cycles_since_horizontal_sync_ / time_multiplier_);
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return end_point;
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return end_point;
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@ -414,7 +414,7 @@ void CRT::output_colour_burst(int number_of_cycles, uint8_t phase, bool is_alter
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scan.number_of_cycles = number_of_cycles;
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scan.number_of_cycles = number_of_cycles;
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scan.phase = phase;
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scan.phase = phase;
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scan.amplitude = amplitude >> 1;
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scan.amplitude = amplitude >> 1;
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is_alernate_line_ = is_alternate_line;
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is_alternate_line_ = is_alternate_line;
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output_scan(&scan);
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output_scan(&scan);
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}
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}
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@ -60,7 +60,7 @@ class CRT {
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int64_t phase_denominator_ = 1;
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int64_t phase_denominator_ = 1;
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int64_t phase_numerator_ = 0;
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int64_t phase_numerator_ = 0;
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int64_t colour_cycle_numerator_ = 1;
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int64_t colour_cycle_numerator_ = 1;
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bool is_alernate_line_ = false, phase_alternates_ = false, should_be_alternate_line_ = false;
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bool is_alternate_line_ = false, phase_alternates_ = false, should_be_alternate_line_ = false;
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void advance_cycles(int number_of_cycles, bool hsync_requested, bool vsync_requested, const Scan::Type type, int number_of_samples);
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void advance_cycles(int number_of_cycles, bool hsync_requested, bool vsync_requested, const Scan::Type type, int number_of_samples);
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Flywheel::SyncEvent get_next_vertical_sync_event(bool vsync_is_requested, int cycles_to_run_for, int *cycles_advanced);
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Flywheel::SyncEvent get_next_vertical_sync_event(bool vsync_is_requested, int cycles_to_run_for, int *cycles_advanced);
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@ -457,7 +457,7 @@ std::unique_ptr<Shader> ScanTarget::conversion_shader() const {
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");"
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");"
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"float luminance = dot(samples, vec4(0.15, 0.35, 0.35, 0.25));"
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"float luminance = dot(samples, vec4(0.15, 0.35, 0.35, 0.25));"
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// Split and average chrominaxnce.
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// Split and average chrominance.
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"vec2 chrominances[4] = vec2[4]("
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"vec2 chrominances[4] = vec2[4]("
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"textureLod(qamTextureName, qamTextureCoordinates[0], 0).gb,"
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"textureLod(qamTextureName, qamTextureCoordinates[0], 0).gb,"
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"textureLod(qamTextureName, qamTextureCoordinates[1], 0).gb,"
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"textureLod(qamTextureName, qamTextureCoordinates[1], 0).gb,"
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@ -38,8 +38,8 @@ MacintoshIMG::MacintoshIMG(const std::string &file_name, FixedType type, size_t
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MacintoshIMG::MacintoshIMG(const std::string &file_name) :
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MacintoshIMG::MacintoshIMG(const std::string &file_name) :
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file_(file_name) {
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file_(file_name) {
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// Test 1: is this a raw secctor dump? If so it'll start with
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// Test 1: is this a raw sector dump? If so it'll start with
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// either the magic word 0x4C4B (big endian) or with 0x00000
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// either the magic word 0x4C4B (big endian) or with 0x0000
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// and be exactly 819,200 bytes long if double sided, or
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// and be exactly 819,200 bytes long if double sided, or
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// 409,600 bytes if single sided.
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// 409,600 bytes if single sided.
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//
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//
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@ -38,7 +38,7 @@ Storage::Disk::PCMSegment sync(int length, int bit_size) {
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// Reserve sufficient storage.
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// Reserve sufficient storage.
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segment.data.reserve(size_t(length * bit_size));
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segment.data.reserve(size_t(length * bit_size));
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// Write patters of 0xff padded with 0s to the selected bit size.
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// Write patterns of 0xff padded with 0s to the selected bit size.
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while(length--) {
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while(length--) {
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int c = 8;
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int c = 8;
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while(c--)
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while(c--)
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