git.y1.nz

commit 2366cfde7217bdea369cd005f45a692ef40a0d17
parent 21b1f9bc50bcd991b876f8d24aebea1abfefe902
Author: Toxa <untoxa@mail.ru>
Date:   Tue, 20 Feb 2024 22:36:28 +0300

EXAMPLES: GB Printer: image centering

Diffstat:
M
gbdk-lib/examples/gb/gbprinter/src/gbprinter.c
4
++--
M
gbdk-lib/examples/gb/gbprinter/src/gbprinter.h
2
+-
M
gbdk-lib/examples/gb/gbprinter/src/print_example.c
2
+-

3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/gbdk-lib/examples/gb/gbprinter/src/gbprinter.c b/gbdk-lib/examples/gb/gbprinter/src/gbprinter.c
@@ -95,7 +95,7 @@ uint8_t gbprinter_detect(uint8_t delay) {
     return printer_wait(delay, PRN_STATUS_MASK_ANY, PRN_STATUS_OK);
 }
 
-uint8_t gbprinter_print_image(const uint8_t * image_map, const uint8_t * image, uint8_t pos_x, uint8_t width, uint8_t height) {
+uint8_t gbprinter_print_image(const uint8_t * image_map, const uint8_t * image, int8_t pos_x, uint8_t width, uint8_t height) {
     static const uint8_t * img;
     static uint8_t error;
 
@@ -108,7 +108,7 @@ uint8_t gbprinter_print_image(const uint8_t * image_map, const uint8_t * image, 
     printer_tile_num = 0;
 
     for (uint8_t y = 0; y != rows; y++) {
-        for (uint8_t x = 0; x != PRN_TILE_WIDTH; x++) {
+        for (int16_t x = 0; x != PRN_TILE_WIDTH; x++) {
             // overlay the picture tile if in range
             if ((y < height) && (x >= pos_x) && (x < (pos_x + width))) {
                 uint8_t tile = image_map[(y * width) + (x - pos_x)];
diff --git a/gbdk-lib/examples/gb/gbprinter/src/gbprinter.h b/gbdk-lib/examples/gb/gbprinter/src/gbprinter.h
@@ -139,6 +139,6 @@ inline void gbprinter_set_print_params(uint8_t margins, uint8_t palette, uint8_t
 }
 
 uint8_t gbprinter_detect(uint8_t delay);
-uint8_t gbprinter_print_image(const uint8_t * image_map, const uint8_t * image, uint8_t pos_x, uint8_t width, uint8_t height);
+uint8_t gbprinter_print_image(const uint8_t * image_map, const uint8_t * image, int8_t pos_x, uint8_t width, uint8_t height);
 
 #endif
diff --git a/gbdk-lib/examples/gb/gbprinter/src/print_example.c b/gbdk-lib/examples/gb/gbprinter/src/print_example.c
@@ -18,7 +18,7 @@ void main(void) {
         waitpad(J_A);
 	if (gbprinter_detect(PRINTER_DETECT_TIMEOUT) == PRN_STATUS_OK) {
             if (gbprinter_print_image(scene00001_map, scene00001_tiles,
-                                      0,
+                                      (PRN_TILE_WIDTH - (scene00001_WIDTH / scene00001_TILE_W)) / 2,
                                       (scene00001_WIDTH / scene00001_TILE_W), (scene00001_HEIGHT / scene00001_TILE_H)) == PRN_STATUS_OK) {
                 puts("Printed OK!");
             } else {

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