43 void draw_rgba(char *buffer, int width, int height) {  in draw_rgba()  argument
44     for (int i = 0; i < height; i++) {  in draw_rgba()
72 void draw_YUV420(char *buffer, int width, int height) {  in draw_YUV420()  argument
74     memset(buffer, 0xa8, width * height / 2);  in draw_YUV420()
75     memset(buffer + width * height / 2, 0x54, width * height / 2);  in draw_YUV420()
77     memset(buffer + width * height, 0x80, width * height / 4);  in draw_YUV420()
78     memset(buffer + (int)(width * height * 1.25), 0x30, width * height / 4);  in draw_YUV420()
81 void draw_YUV422(char *buffer, int width, int height) {  in draw_YUV422()  argument
83     memset(buffer, 0xa8, width * height / 2);  in draw_YUV422()
84     memset(buffer + width * height / 2, 0x54, width * height / 2);  in draw_YUV422()
86     memset(buffer + width * height, 0x80, width * height / 2);  in draw_YUV422()
87     memset(buffer + (int)(width * height * 1.5), 0x30, width * height / 2);  in draw_YUV422()
90 void draw_gray256(char *buffer, int width, int height) {  in draw_gray256()  argument
91     for (int i = 0; i < height; i++) {  in draw_gray256()