1013 lines
31 KiB
C++
1013 lines
31 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 24.10.2015
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*
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* Buffer features based on the stringify loop,
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* and other abstract buffer features.
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*
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*/
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// TOP
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#define Buffer_Init_Type cat_4tech(Buffer_Type, _Init)
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#define Buffer_Stream_Type cat_4tech(Buffer_Type, _Stream)
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inline_4tech void
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buffer_stringify(Buffer_Type *buffer, i32 start, i32 end, char *out){
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Buffer_Stream_Type stream = {0};
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i32 i = start;
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if (buffer_stringify_loop(&stream, buffer, i, end)){
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b32 still_looping = 0;
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do{
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i32 size = stream.end - i;
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memcpy_4tech(out, stream.data + i, size);
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i = stream.end;
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out += size;
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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}
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internal_4tech i32
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buffer_convert_out(Buffer_Type *buffer, char *dest, i32 max){
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Buffer_Stream_Type stream = {0};
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i32 i = 0;
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i32 size = buffer_size(buffer);
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assert_4tech(size + buffer->line_count <= max);
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i32 pos = 0;
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if (buffer_stringify_loop(&stream, buffer, 0, size)){
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b32 still_looping = 0;
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do{
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i32 size = stream.end - i;
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i32 out_size = 0;
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i32 result = eol_convert_out(dest + pos, max - pos, stream.data + i, size, &out_size);
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assert_4tech(result);
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i = stream.end;
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pos += out_size;
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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return(pos);
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}
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internal_4tech i32
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buffer_count_newlines(Buffer_Type *buffer, i32 start, i32 end){
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Buffer_Stream_Type stream = {0};
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i32 i = start;
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i32 count = 0;
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assert_4tech(0 <= start);
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assert_4tech(start <= end);
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assert_4tech(end <= buffer_size(buffer));
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if (buffer_stringify_loop(&stream, buffer, i, end)){
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b32 still_looping = 0;
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do{
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for (; i < stream.end; ++i){
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count += (stream.data[i] == '\n');
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}
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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return(count);
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}
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typedef struct Buffer_Measure_Starts{
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i32 i;
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i32 count;
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i32 start;
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} Buffer_Measure_Starts;
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// TODO(allen): Rewrite this with a duff routine
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// Also make it so that the array goes one past the end
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// and stores the size in the extra spot.
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internal_4tech i32
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buffer_measure_starts(Buffer_Measure_Starts *state, Buffer_Type *buffer){
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Buffer_Stream_Type stream = {0};
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i32 size = buffer_size(buffer);
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i32 start = state->start, i = state->i;
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i32 *start_ptr = buffer->line_starts + state->count;
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i32 *start_end = buffer->line_starts + buffer->line_max;
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i32 result = 1;
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if (buffer_stringify_loop(&stream, buffer, i, size)){
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b32 still_looping = 0;
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do{
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for (; i < stream.end; ++i){
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char ch = stream.data[i];
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if (ch == '\n'){
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if (start_ptr == start_end){
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goto buffer_measure_starts_widths_end;
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}
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*start_ptr++ = start;
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start = i + 1;
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}
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}
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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assert_4tech(i == size);
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if (start_ptr == start_end){
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goto buffer_measure_starts_widths_end;
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}
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*start_ptr++ = start;
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result = 0;
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buffer_measure_starts_widths_end:;
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state->i = i;
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state->count = (i32)(start_ptr - buffer->line_starts);
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state->start = start;
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return(result);
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}
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internal_4tech void
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buffer_measure_wrap_y(Buffer_Type *buffer, f32 *wraps, f32 font_height, f32 *adv, f32 max_width){
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Buffer_Stream_Type stream = {0};
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i32 i = 0;
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i32 size = buffer_size(buffer);
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i32 wrap_index = 0;
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f32 last_wrap = 0.f;
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f32 current_wrap = 0.f;
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f32 x = 0.f;
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if (buffer_stringify_loop(&stream, buffer, i, size)){
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b32 still_looping = 0;
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do{
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for (; i < stream.end; ++i){
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u8 ch = (u8)stream.data[i];
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if (ch == '\n'){
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wraps[wrap_index++] = last_wrap;
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current_wrap += font_height;
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last_wrap = current_wrap;
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x = 0.f;
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}
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else{
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f32 current_adv = adv[ch];
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if (x + current_adv > max_width){
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current_wrap += font_height;
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x = current_adv;
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}
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else{
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x += current_adv;
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}
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}
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}
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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wraps[wrap_index++] = last_wrap;
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wraps[wrap_index++] = current_wrap;
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assert_4tech(wrap_index-1 == buffer->line_count);
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}
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internal_4tech void
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buffer_remeasure_starts(Buffer_Type *buffer, i32 line_start, i32 line_end, i32 line_shift, i32 text_shift){
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i32 *starts = buffer->line_starts;
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i32 line_count = buffer->line_count;
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assert_4tech(0 <= line_start);
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assert_4tech(line_start <= line_end);
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assert_4tech(line_end < line_count);
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assert_4tech(line_count + line_shift <= buffer->line_max);
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++line_end;
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// Adjust
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if (text_shift != 0){
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i32 line_i = line_end;
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starts += line_i;
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for (; line_i < line_count; ++line_i, ++starts){
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*starts += text_shift;
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}
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starts = buffer->line_starts;
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}
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// Shift
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i32 new_line_count = line_count;
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i32 new_line_end = line_end;
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if (line_shift != 0){
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memmove_4tech(starts + line_end + line_shift, starts + line_end,
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sizeof(i32)*(line_count - line_end));
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new_line_count += line_shift;
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new_line_end += line_shift;
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}
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// Iteration data (yikes! Need better loop system)
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Buffer_Stream_Type stream = {0};
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i32 size = buffer_size(buffer);
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i32 char_i = starts[line_start];
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i32 line_i = line_start;
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// Line start measurement
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i32 start = char_i;
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if (buffer_stringify_loop(&stream, buffer, char_i, size)){
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b32 still_looping = 0;
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do{
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for (; char_i < stream.end; ++char_i){
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u8 ch = (u8)stream.data[char_i];
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if (ch == '\n'){
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starts[line_i] = start;
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++line_i;
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start = char_i + 1;
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// TODO(allen): I would like to know that I am not guessing here,
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// so let's try to turn the && into an Assert.
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if (line_i >= new_line_end && (line_i >= new_line_count || start == starts[line_i])){
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goto buffer_remeasure_starts_end;
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}
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}
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}
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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// TODO(allen): I suspect this can just go away.
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if (char_i == size){
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starts[line_i++] = start;
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}
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buffer_remeasure_starts_end:;
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assert_4tech(line_count >= 1);
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buffer->line_count = new_line_count;
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}
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internal_4tech void
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buffer_remeasure_wrap_y(Buffer_Type *buffer, i32 line_start, i32 line_end, i32 line_shift,
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f32 *wraps, f32 font_height, f32 *adv, f32 max_width){
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i32 new_line_count = buffer->line_count;
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assert_4tech(0 <= line_start);
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assert_4tech(line_start <= line_end);
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assert_4tech(line_end < new_line_count - line_shift);
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++line_end;
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// Shift
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i32 line_count = new_line_count;
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i32 new_line_end = line_end;
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if (line_shift != 0){
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memmove_4tech(wraps + line_end + line_shift, wraps + line_end,
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sizeof(i32)*(line_count - line_end));
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line_count -= line_shift;
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new_line_end += line_shift;
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}
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// Iteration data (yikes! Need better loop system)
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Buffer_Stream_Type stream = {0};
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i32 size = buffer_size(buffer);
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i32 char_i = buffer->line_starts[line_start];
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i32 line_i = line_start;
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// Line wrap measurement
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f32 last_wrap = wraps[line_i];
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f32 current_wrap = last_wrap;
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f32 x = 0.f;
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if (buffer_stringify_loop(&stream, buffer, char_i, size)){
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b32 still_looping = 0;
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do{
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for (; char_i < stream.end; ++char_i){
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u8 ch = (u8)stream.data[char_i];
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if (ch == '\n'){
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wraps[line_i] = last_wrap;
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++line_i;
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current_wrap += font_height;
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last_wrap = current_wrap;
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x = 0.f;
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// TODO(allen): I would like to know that I am not guessing here.
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if (line_i >= new_line_end){
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goto buffer_remeasure_wraps_end;
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}
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}
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else{
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f32 current_adv = adv[ch];
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if (x + current_adv > max_width){
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current_wrap += font_height;
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x = current_adv;
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}
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else{
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x += current_adv;
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}
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}
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}
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still_looping = buffer_stringify_next(&stream);
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}while(still_looping);
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}
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wraps[line_i++] = last_wrap;
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buffer_remeasure_wraps_end:;
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f32 y_shift = current_wrap - wraps[line_i];
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// Adjust
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if (y_shift != 0){
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wraps += line_i;
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for (; line_i <= new_line_count; ++line_i, ++wraps){
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*wraps += y_shift;
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}
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}
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}
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internal_4tech i32
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buffer_get_line_index_range(Buffer_Type *buffer, i32 pos, i32 l_bound, i32 u_bound){
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i32 *lines = buffer->line_starts;
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i32 start = l_bound, end = u_bound;
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i32 i = 0;
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assert_4tech(0 <= l_bound);
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assert_4tech(l_bound <= u_bound);
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assert_4tech(u_bound <= buffer->line_count);
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assert_4tech(lines != 0);
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for (;;){
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i = (start + end) >> 1;
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if (lines[i] < pos){
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start = i;
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}
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else if (lines[i] > pos){
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end = i;
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}
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else{
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start = i;
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break;
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}
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assert_4tech(start < end);
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if (start == end - 1){
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break;
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}
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}
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return(start);
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}
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inline_4tech i32
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buffer_get_line_index(Buffer_Type *buffer, i32 pos){
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i32 result = buffer_get_line_index_range(buffer, pos, 0, buffer->line_count);
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return(result);
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}
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internal_4tech i32
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buffer_get_line_index_from_wrapped_y(f32 *wraps, f32 y, f32 font_height, i32 l_bound, i32 u_bound){
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i32 start, end, i, result;
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start = l_bound;
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end = u_bound;
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for (;;){
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i = (start + end) / 2;
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if (wraps[i]+font_height <= y) start = i;
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else if (wraps[i] > y) end = i;
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else{
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result = i;
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break;
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}
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if (start >= end - 1){
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result = start;
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break;
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}
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}
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return(result);
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}
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typedef struct Seek_State{
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Full_Cursor cursor;
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Full_Cursor prev_cursor;
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} Seek_State;
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internal_4tech i32
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cursor_seek_step(Seek_State *state, Buffer_Seek seek, i32 xy_seek, f32 max_width,
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f32 font_height, f32 *adv, i32 size, u8 ch){
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Full_Cursor cursor = state->cursor;
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Full_Cursor prev_cursor = cursor;
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i32 result = 1;
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f32 x, px, y;
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switch (ch){
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case '\n':
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++cursor.line;
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cursor.unwrapped_y += font_height;
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cursor.wrapped_y += font_height;
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cursor.character = 1;
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cursor.unwrapped_x = 0;
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cursor.wrapped_x = 0;
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break;
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default:
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{
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f32 ch_width = adv[ch];
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if (cursor.wrapped_x + ch_width > max_width){
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cursor.wrapped_y += font_height;
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cursor.wrapped_x = 0;
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prev_cursor = cursor;
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}
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++cursor.character;
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cursor.unwrapped_x += ch_width;
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cursor.wrapped_x += ch_width;
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}break;
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}
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++cursor.pos;
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if (cursor.pos > size){
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cursor = prev_cursor;
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result = 0;
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goto cursor_seek_step_end;
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}
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x = y = px = 0;
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|
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switch (seek.type){
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case buffer_seek_pos:
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if (cursor.pos > seek.pos){
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cursor = prev_cursor;
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result = 0;
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goto cursor_seek_step_end;
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}break;
|
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case buffer_seek_wrapped_xy:
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x = cursor.wrapped_x; px = prev_cursor.wrapped_x;
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y = cursor.wrapped_y; break;
|
|
|
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case buffer_seek_unwrapped_xy:
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x = cursor.unwrapped_x; px = prev_cursor.unwrapped_x;
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y = cursor.unwrapped_y; break;
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|
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case buffer_seek_line_char:
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if (cursor.line == seek.line && cursor.character >= seek.character){
|
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result = 0;
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goto cursor_seek_step_end;
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}
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else if (cursor.line > seek.line){
|
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cursor = prev_cursor;
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result = 0;
|
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goto cursor_seek_step_end;
|
|
}break;
|
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}
|
|
|
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if (xy_seek){
|
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if (y > seek.y){
|
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cursor = prev_cursor;
|
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result = 0;
|
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goto cursor_seek_step_end;
|
|
}
|
|
|
|
if (y > seek.y - font_height && x >= seek.x){
|
|
if (!seek.round_down){
|
|
if (ch != '\n' && (seek.x - px) < (x - seek.x)) cursor = prev_cursor;
|
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result = 0;
|
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goto cursor_seek_step_end;
|
|
}
|
|
|
|
if (x > seek.x){
|
|
cursor = prev_cursor;
|
|
result = 0;
|
|
goto cursor_seek_step_end;
|
|
}
|
|
}
|
|
}
|
|
|
|
cursor_seek_step_end:;
|
|
state->cursor = cursor;
|
|
state->prev_cursor = prev_cursor;
|
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return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_cursor_seek(Buffer_Type *buffer, Buffer_Seek seek, f32 max_width,
|
|
f32 font_height, f32 *adv, Full_Cursor cursor){
|
|
i32 result = 0;
|
|
|
|
Seek_State state;
|
|
i32 xy_seek;
|
|
|
|
state.cursor = cursor;
|
|
|
|
switch(seek.type){
|
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case buffer_seek_pos:
|
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if (cursor.pos >= seek.pos) goto buffer_cursor_seek_end;
|
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break;
|
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|
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case buffer_seek_wrapped_xy:
|
|
if (seek.x == 0 && cursor.wrapped_y >= seek.y) goto buffer_cursor_seek_end;
|
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break;
|
|
|
|
case buffer_seek_unwrapped_xy:
|
|
if (seek.x == 0 && cursor.unwrapped_y >= seek.y) goto buffer_cursor_seek_end;
|
|
break;
|
|
|
|
case buffer_seek_line_char:
|
|
if (cursor.line >= seek.line && cursor.character >= seek.character) goto buffer_cursor_seek_end;
|
|
break;
|
|
}
|
|
|
|
if (adv){
|
|
Buffer_Stream_Type stream = {0};
|
|
i32 size = buffer_size(buffer);
|
|
i32 i = cursor.pos;
|
|
|
|
xy_seek = (seek.type == buffer_seek_wrapped_xy || seek.type == buffer_seek_unwrapped_xy);
|
|
result = 1;
|
|
|
|
stream.use_termination_character = 1;
|
|
stream.terminator = 0;
|
|
|
|
if (buffer_stringify_loop(&stream, buffer, i, size)){
|
|
b32 still_looping = 0;
|
|
do{
|
|
for (; i < stream.end; ++i){
|
|
u8 ch = (u8)stream.data[i];
|
|
result = cursor_seek_step(&state, seek, xy_seek, max_width,
|
|
font_height, adv, size, ch);
|
|
if (!result){
|
|
goto buffer_cursor_seek_end;
|
|
}
|
|
}
|
|
still_looping = buffer_stringify_next(&stream);
|
|
}while(still_looping);
|
|
}
|
|
|
|
assert_4tech(result == 0);
|
|
}
|
|
|
|
buffer_cursor_seek_end:;
|
|
return(state.cursor);
|
|
}
|
|
|
|
internal_4tech Partial_Cursor
|
|
buffer_partial_from_pos(Buffer_Type *buffer, i32 pos){
|
|
Partial_Cursor result = {0};
|
|
|
|
int32_t size = buffer_size(buffer);
|
|
if (pos > size){
|
|
pos = size;
|
|
}
|
|
if (pos < 0){
|
|
pos = 0;
|
|
}
|
|
|
|
i32 line_index = buffer_get_line_index_range(buffer, pos, 0, buffer->line_count);
|
|
result.pos = pos;
|
|
result.line = line_index+1;
|
|
result.character = pos - buffer->line_starts[line_index] + 1;
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_cursor_from_pos(Buffer_Type *buffer, f32 *wraps, i32 pos,
|
|
f32 max_width, f32 font_height, f32 *adv){
|
|
Full_Cursor result = {0};
|
|
i32 line_index = 0;
|
|
i32 size = buffer_size(buffer);
|
|
|
|
if (pos > size){
|
|
pos = size;
|
|
}
|
|
if (pos < 0){
|
|
pos = 0;
|
|
}
|
|
|
|
line_index = buffer_get_line_index_range(buffer, pos, 0, buffer->line_count);
|
|
result = make_cursor_hint(line_index, buffer->line_starts, wraps, font_height);
|
|
result = buffer_cursor_seek(buffer, seek_pos(pos), max_width, font_height, adv, result);
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Partial_Cursor
|
|
buffer_partial_from_line_character(Buffer_Type *buffer, i32 line, i32 character){
|
|
Partial_Cursor result = {0};
|
|
|
|
i32 line_index = line - 1;
|
|
if (line_index >= buffer->line_count) line_index = buffer->line_count - 1;
|
|
if (line_index < 0) line_index = 0;
|
|
|
|
int32_t size = buffer_size(buffer);
|
|
i32 this_start = buffer->line_starts[line_index];
|
|
i32 max_character = (size-this_start) + 1;
|
|
if (line_index+1 < buffer->line_count){
|
|
i32 next_start = buffer->line_starts[line_index+1];
|
|
max_character = (next_start-this_start);
|
|
}
|
|
|
|
if (character <= 0) character = 1;
|
|
if (character > max_character) character = max_character;
|
|
|
|
result.pos = this_start + character - 1;
|
|
result.line = line_index+1;
|
|
result.character = character;
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_cursor_from_line_character(Buffer_Type *buffer, f32 *wraps, i32 line, i32 character,
|
|
f32 max_width, f32 font_height, f32 *adv){
|
|
Full_Cursor result = {0};
|
|
i32 line_index = line - 1;
|
|
|
|
if (line_index >= buffer->line_count) line_index = buffer->line_count - 1;
|
|
if (line_index < 0) line_index = 0;
|
|
|
|
result = make_cursor_hint(line_index, buffer->line_starts, wraps, font_height);
|
|
result = buffer_cursor_seek(buffer, seek_line_char(line, character),
|
|
max_width, font_height, adv, result);
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_cursor_from_unwrapped_xy(Buffer_Type *buffer, f32 *wraps, f32 x, f32 y, i32 round_down,
|
|
f32 max_width, f32 font_height, f32 *adv){
|
|
Full_Cursor result = {0};
|
|
i32 line_index = (i32)(y / font_height);
|
|
|
|
if (line_index >= buffer->line_count) line_index = buffer->line_count - 1;
|
|
if (line_index < 0) line_index = 0;
|
|
|
|
result = make_cursor_hint(line_index, buffer->line_starts, wraps, font_height);
|
|
result = buffer_cursor_seek(buffer, seek_unwrapped_xy(x, y, round_down),
|
|
max_width, font_height, adv, result);
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_cursor_from_wrapped_xy(Buffer_Type *buffer, f32 *wraps, f32 x, f32 y, i32 round_down,
|
|
f32 max_width, f32 font_height, f32 *adv){
|
|
Full_Cursor result = {0};
|
|
i32 line_index = buffer_get_line_index_from_wrapped_y(wraps, y, font_height, 0, buffer->line_count);
|
|
|
|
result = make_cursor_hint(line_index, buffer->line_starts, wraps, font_height);
|
|
result = buffer_cursor_seek(buffer, seek_wrapped_xy(x, y, round_down),
|
|
max_width, font_height, adv, result);
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech void
|
|
buffer_invert_edit_shift(Buffer_Type *buffer, Buffer_Edit edit, Buffer_Edit *inverse, char *strings,
|
|
i32 *str_pos, i32 max, i32 shift_amount){
|
|
i32 pos = *str_pos;
|
|
i32 len = edit.end - edit.start;
|
|
assert_4tech(pos >= 0);
|
|
assert_4tech(pos + len <= max);
|
|
*str_pos = pos + len;
|
|
|
|
inverse->str_start = pos;
|
|
inverse->len = len;
|
|
inverse->start = edit.start + shift_amount;
|
|
inverse->end = edit.start + edit.len + shift_amount;
|
|
buffer_stringify(buffer, edit.start, edit.end, strings + pos);
|
|
}
|
|
|
|
inline_4tech void
|
|
buffer_invert_edit(Buffer_Type *buffer, Buffer_Edit edit, Buffer_Edit *inverse, char *strings,
|
|
i32 *str_pos, i32 max){
|
|
buffer_invert_edit_shift(buffer, edit, inverse, strings, str_pos, max, 0);
|
|
}
|
|
|
|
typedef struct Buffer_Invert_Batch{
|
|
i32 i;
|
|
i32 shift_amount;
|
|
i32 len;
|
|
} Buffer_Invert_Batch;
|
|
|
|
internal_4tech i32
|
|
buffer_invert_batch(Buffer_Invert_Batch *state, Buffer_Type *buffer, Buffer_Edit *edits, i32 count,
|
|
Buffer_Edit *inverse, char *strings, i32 *str_pos, i32 max){
|
|
i32 shift_amount = state->shift_amount;
|
|
i32 i = state->i;
|
|
Buffer_Edit *edit = edits + i;
|
|
Buffer_Edit *inv_edit = inverse + i;
|
|
i32 result = 0;
|
|
|
|
for (; i < count; ++i, ++edit, ++inv_edit){
|
|
if (*str_pos + edit->end - edit->start <= max){
|
|
buffer_invert_edit_shift(buffer, *edit, inv_edit, strings, str_pos, max, shift_amount);
|
|
shift_amount += (edit->len - (edit->end - edit->start));
|
|
}
|
|
else{
|
|
result = 1;
|
|
state->len = edit->end - edit->start;
|
|
}
|
|
}
|
|
|
|
state->i = i;
|
|
state->shift_amount = shift_amount;
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech Full_Cursor
|
|
buffer_get_start_cursor(Buffer_Type *buffer, f32 *wraps, f32 scroll_y,
|
|
i32 wrapped, f32 width, f32 *adv, f32 font_height){
|
|
Full_Cursor result;
|
|
|
|
if (wrapped){
|
|
result = buffer_cursor_from_wrapped_xy(buffer, wraps, 0, scroll_y, 0,
|
|
width, font_height, adv);
|
|
}
|
|
else{
|
|
result = buffer_cursor_from_unwrapped_xy(buffer, wraps, 0, scroll_y, 0,
|
|
width, font_height, adv);
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
enum Buffer_Render_Flag{
|
|
BRFlag_Special_Character = (1 << 0)
|
|
};
|
|
|
|
typedef struct Buffer_Render_Item{
|
|
i32 index;
|
|
u16 glyphid;
|
|
u16 flags;
|
|
f32 x0, y0;
|
|
f32 x1, y1;
|
|
} Buffer_Render_Item;
|
|
|
|
typedef struct Render_Item_Write{
|
|
Buffer_Render_Item *item;
|
|
f32 x, y;
|
|
f32 *adv;
|
|
f32 font_height;
|
|
f32 x_min;
|
|
f32 x_max;
|
|
} Render_Item_Write;
|
|
|
|
inline_4tech Render_Item_Write
|
|
write_render_item(Render_Item_Write write, i32 index, u16 glyphid, u16 flags){
|
|
f32 ch_width = measure_character(write.adv, (char)glyphid);
|
|
|
|
if (write.x <= write.x_max && write.x + ch_width >= write.x_min){
|
|
write.item->index = index;
|
|
write.item->glyphid = glyphid;
|
|
write.item->flags = flags;
|
|
write.item->x0 = write.x;
|
|
write.item->y0 = write.y;
|
|
write.item->x1 = write.x + ch_width;
|
|
write.item->y1 = write.y + write.font_height;
|
|
|
|
++write.item;
|
|
}
|
|
|
|
write.x += ch_width;
|
|
|
|
return(write);
|
|
}
|
|
|
|
// TODO(allen): Reduce the number of parameters.
|
|
struct Buffer_Render_Params{
|
|
Buffer_Type *buffer;
|
|
Buffer_Render_Item *items;
|
|
i32 max;
|
|
i32 *count;
|
|
f32 port_x;
|
|
f32 port_y;
|
|
f32 clip_w;
|
|
f32 scroll_x;
|
|
f32 scroll_y;
|
|
f32 width;
|
|
f32 height;
|
|
Full_Cursor start_cursor;
|
|
i32 wrapped;
|
|
f32 font_height;
|
|
f32 *adv;
|
|
b32 virtual_white;
|
|
};
|
|
|
|
struct Buffer_Render_State{
|
|
Buffer_Stream_Type stream;
|
|
b32 still_looping;
|
|
i32 i;
|
|
|
|
f32 ch_width;
|
|
u8 ch;
|
|
|
|
Render_Item_Write write;
|
|
|
|
i32 line;
|
|
b32 skipping_whitespace;
|
|
|
|
i32 __pc__;
|
|
};
|
|
|
|
// duff-routine defines
|
|
#define DrCase(PC) case PC: goto resumespot_##PC
|
|
#define DrYield(PC, n) { *S_ptr = S; S_ptr->__pc__ = PC; return(n); resumespot_##PC:; }
|
|
#define DrReturn(n) { *S_ptr = S; S_ptr->__pc__ = -1; return(n); }
|
|
|
|
enum{
|
|
RenderStatus_Finished,
|
|
RenderStatus_NeedLineShift
|
|
};
|
|
|
|
struct Buffer_Render_Stop{
|
|
u32 status;
|
|
i32 line_index;
|
|
i32 pos;
|
|
};
|
|
|
|
internal_4tech Buffer_Render_Stop
|
|
buffer_render_data(Buffer_Render_State *S_ptr, Buffer_Render_Params params, f32 line_shift){
|
|
Buffer_Render_State S = *S_ptr;
|
|
Buffer_Render_Stop S_stop;
|
|
|
|
i32 size = buffer_size(params.buffer);
|
|
f32 shift_x = params.port_x - params.scroll_x;
|
|
f32 shift_y = params.port_y - params.scroll_y;
|
|
|
|
if (params.wrapped){
|
|
shift_y += params.start_cursor.wrapped_y;
|
|
}
|
|
else{
|
|
shift_y += params.start_cursor.unwrapped_y;
|
|
}
|
|
|
|
Buffer_Render_Item *item_end = params.items + params.max;
|
|
|
|
switch (S.__pc__){
|
|
DrCase(1);
|
|
DrCase(2);
|
|
DrCase(3);
|
|
}
|
|
|
|
S.line = params.start_cursor.line - 1;
|
|
|
|
if (params.virtual_white){
|
|
S_stop.status = RenderStatus_NeedLineShift;
|
|
S_stop.line_index = S.line;
|
|
S_stop.pos = params.start_cursor.pos;
|
|
DrYield(1, S_stop);
|
|
}
|
|
|
|
S.write.item = params.items;
|
|
S.write.x = shift_x + line_shift;
|
|
S.write.y = shift_y;
|
|
S.write.adv = params.adv;
|
|
S.write.font_height = params.font_height;
|
|
S.write.x_min = params.port_x;
|
|
S.write.x_max = params.port_x + params.clip_w;
|
|
|
|
if (params.adv){
|
|
S.i = params.start_cursor.pos;
|
|
if (buffer_stringify_loop(&S.stream, params.buffer, S.i, size)){
|
|
do{
|
|
for (; S.i < S.stream.end; ++S.i){
|
|
S.ch = (u8)S.stream.data[S.i];
|
|
S.ch_width = measure_character(params.adv, S.ch);
|
|
|
|
if (S.ch_width + S.write.x > params.width + shift_x && S.ch != '\n' && params.wrapped){
|
|
if (params.virtual_white){
|
|
S_stop.status = RenderStatus_NeedLineShift;
|
|
S_stop.line_index = S.line;
|
|
S_stop.pos = S.i+1;
|
|
DrYield(2, S_stop);
|
|
}
|
|
|
|
S.write.x = shift_x + line_shift;
|
|
S.write.y += params.font_height;
|
|
}
|
|
|
|
if (S.write.y > params.height + shift_y){
|
|
goto buffer_get_render_data_end;
|
|
}
|
|
|
|
if (S.ch != ' ' && S.ch != '\t'){
|
|
S.skipping_whitespace = 0;
|
|
}
|
|
|
|
if (!S.skipping_whitespace){
|
|
switch (S.ch){
|
|
case '\n':
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, S.i, ' ', 0);
|
|
|
|
if (params.virtual_white){
|
|
S_stop.status = RenderStatus_NeedLineShift;
|
|
S_stop.line_index = S.line+1;
|
|
S_stop.pos = S.i+1;
|
|
DrYield(3, S_stop);
|
|
|
|
S.skipping_whitespace = 1;
|
|
}
|
|
|
|
++S.line;
|
|
|
|
S.write.x = shift_x + line_shift;
|
|
S.write.y += params.font_height;
|
|
}
|
|
break;
|
|
|
|
case '\r':
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, S.i, '\\', BRFlag_Special_Character);
|
|
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, S.i, 'r', BRFlag_Special_Character);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '\t':
|
|
if (S.write.item < item_end){
|
|
f32 new_x = S.write.x + S.ch_width;
|
|
S.write = write_render_item(S.write, S.i, ' ', 0);
|
|
S.write.x = new_x;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (S.write.item < item_end){
|
|
if (S.ch >= ' ' && S.ch <= '~'){
|
|
S.write = write_render_item(S.write, S.i, S.ch, 0);
|
|
}
|
|
else{
|
|
S.write = write_render_item(S.write, S.i, '\\', BRFlag_Special_Character);
|
|
|
|
char ch = S.ch;
|
|
char C = '0' + (ch / 0x10);
|
|
if ((ch / 0x10) > 0x9){
|
|
C = ('A' - 0xA) + (ch / 0x10);
|
|
}
|
|
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, S.i, C, BRFlag_Special_Character);
|
|
}
|
|
|
|
ch = (ch % 0x10);
|
|
C = '0' + ch;
|
|
if (ch > 0x9){
|
|
C = ('A' - 0xA) + ch;
|
|
}
|
|
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, S.i, C, BRFlag_Special_Character);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (S.write.y > params.height + shift_y){
|
|
goto buffer_get_render_data_end;
|
|
}
|
|
}
|
|
S.still_looping = buffer_stringify_next(&S.stream);
|
|
}while(S.still_looping);
|
|
}
|
|
|
|
buffer_get_render_data_end:;
|
|
if (S.write.y <= params.height + shift_y || S.write.item == params.items){
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, size, ' ', 0);
|
|
}
|
|
}
|
|
}
|
|
else{
|
|
f32 zero = 0;
|
|
S.write.adv = &zero;
|
|
|
|
if (S.write.item < item_end){
|
|
S.write = write_render_item(S.write, size, 0, 0);
|
|
}
|
|
}
|
|
|
|
*params.count = (i32)(S.write.item - params.items);
|
|
assert_4tech(*params.count <= params.max);
|
|
|
|
S_stop.status = RenderStatus_Finished;
|
|
DrReturn(S_stop);
|
|
}
|
|
|
|
#undef DrYield
|
|
#undef DrReturn
|
|
#undef DrCase
|
|
|
|
// BOTTOM
|
|
|