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https://github.com/badgeteam/mch2022-template-app.git
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49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
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/*
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* The functions in this file serve as a simple way of
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* storing which area of the framebuffer needs to be
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* sent to the display during the next flush
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*
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* (This only applies to the main framebuffer and not to the compositor frames!)
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*/
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#include "include/driver_framebuffer_internal.h"
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/* Variables */
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int16_t dirty_x0 = 0, dirty_y0 = 0; // Top-left corner of the "dirty" area
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int16_t dirty_x1 = FB_WIDTH-1, dirty_y1 = FB_HEIGHT-1; // Bottom-right corner of the "dirty" area
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/* Public functions */
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bool driver_framebuffer_is_dirty()
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{
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return (dirty_x1 >= dirty_x0) || (dirty_y1 >= dirty_y0);
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}
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void driver_framebuffer_set_dirty_area(int16_t x0, int16_t y0, int16_t x1, int16_t y1, bool force)
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{
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if (force) {
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//Just set the dirty area
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dirty_x0 = x0;
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dirty_y0 = y0;
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dirty_x1 = x1;
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dirty_y1 = y1;
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} else {
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//Only increase the dirty area
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if (x0 < dirty_x0) dirty_x0 = x0;
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if (y0 < dirty_y0) dirty_y0 = y0;
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if (x1 > dirty_x1) dirty_x1 = x1;
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if (y1 > dirty_y1) dirty_y1 = y1;
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}
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if (dirty_x0 > FB_WIDTH-1) dirty_x0 = FB_WIDTH - 1;
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if (dirty_y0 > FB_HEIGHT-1) dirty_y0 = FB_HEIGHT - 1;
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if (dirty_x1 > FB_WIDTH-1) dirty_x1 = FB_WIDTH - 1;
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if (dirty_y1 > FB_HEIGHT-1) dirty_y1 = FB_HEIGHT - 1;
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}
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void driver_framebuffer_get_dirty_area(int16_t* x0, int16_t* y0, int16_t* x1, int16_t* y1)
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{
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*x0 = dirty_x0;
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*y0 = dirty_y0;
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*x1 = dirty_x1;
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*y1 = dirty_y1;
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}
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