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comparison oscilloscope.c @ 2685:da2e06c42d16

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Add a compile-time flag to use RGB565 instead of ABGR/ARGB
author Michael Pavone <pavone@retrodev.com>
date Sun, 30 Mar 2025 00:06:53 -0700
parents d30ea441b92e
children
comparison
equal deleted inserted replaced
2684:c649bcc18487 2685:da2e06c42d16
54 } 54 }
55 } 55 }
56 void scope_render(oscilloscope *scope) 56 void scope_render(oscilloscope *scope)
57 { 57 {
58 int pitch; 58 int pitch;
59 uint32_t *fb = render_get_framebuffer(scope->window, &pitch); 59 pixel_t *fb = render_get_framebuffer(scope->window, &pitch);
60 memset(fb, 0, HEIGHT * pitch); 60 memset(fb, 0, HEIGHT * pitch);
61 pitch /= sizeof(uint32_t); 61 pitch /= sizeof(pixel_t);
62 int offset = 0; 62 int offset = 0;
63 int column_width = WIDTH/3; 63 int column_width = WIDTH/3;
64 int width = column_width * 3; 64 int width = column_width * 3;
65 int row_height = HEIGHT / ((scope->num_channels + 2) / 3); 65 int row_height = HEIGHT / ((scope->num_channels + 2) / 3);
66 float value_scale = (float)row_height / 20000.0f; 66 float value_scale = (float)row_height / 20000.0f;
67 uint32_t *cur_line = fb; 67 pixel_t *cur_line = fb;
68 pixel_t white = render_map_color(255, 255, 255);
68 for (uint8_t i = 0; i < scope->num_channels; i++) 69 for (uint8_t i = 0; i < scope->num_channels; i++)
69 { 70 {
70 float samples_per_pixel = (float)scope->channels[i].period / (float)(2*column_width); 71 float samples_per_pixel = (float)scope->channels[i].period / (float)(2*column_width);
71 uint32_t start = scope->channels[i].last_trigger; 72 uint32_t start = scope->channels[i].last_trigger;
72 if (start == INVALID_TRIGGER) { 73 if (start == INVALID_TRIGGER) {
94 y += row_height / 2; 95 y += row_height / 2;
95 if (last_y >= 0) { 96 if (last_y >= 0) {
96 int delta = last_y > y ? -1 : 1; 97 int delta = last_y > y ? -1 : 1;
97 while (last_y != y) 98 while (last_y != y)
98 { 99 {
99 cur_line[last_y * pitch + x ] = 0xFFFFFFFF; 100 cur_line[last_y * pitch + x ] = white;
100 last_y += delta; 101 last_y += delta;
101 } 102 }
102 } else { 103 } else {
103 last_y = y; 104 last_y = y;
104 } 105 }
105 cur_line[y * pitch + x ] = 0xFFFFFFFF; 106 cur_line[y * pitch + x ] = white;
106 cur_sample += samples_per_pixel; 107 cur_sample += samples_per_pixel;
107 if (cur_sample + 0.5f >= scope->channels[i].period) { 108 if (cur_sample + 0.5f >= scope->channels[i].period) {
108 cur_sample -= scope->channels[i].period; 109 cur_sample -= scope->channels[i].period;
109 } 110 }
110 } 111 }