diff options
Diffstat (limited to 'minuitwrp/graphics_utils.cpp')
| -rw-r--r-- | minuitwrp/graphics_utils.cpp | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/minuitwrp/graphics_utils.cpp b/minuitwrp/graphics_utils.cpp index 67c836ed5..c591e5398 100644 --- a/minuitwrp/graphics_utils.cpp +++ b/minuitwrp/graphics_utils.cpp @@ -19,6 +19,7 @@ #include <png.h> #include <pixelflinger/pixelflinger.h> #include <linux/fb.h> +#include <string.h> #include "minui.h" @@ -121,3 +122,47 @@ exit: fclose(fp); return res; } + +#define MATRIX_ELEMENT(matrix, row, col, row_size, elem_size) \ + (((uint8_t*) (matrix)) + (((row) * (elem_size)) * (row_size)) + ((col) * (elem_size))) + +#define DO_MATRIX_ROTATION(bits_per_pixel, bytes_per_pixel) \ +{ \ + for (size_t y = 0; y < src->height; y++) { \ + for (size_t x = 0; x < src->width; x++) { \ + /* output pointer in dst->data */ \ + uint##bits_per_pixel##_t *op; \ + /* input pointer from src->data */ \ + const uint##bits_per_pixel##_t *ip; \ + /* Display coordinates (in dst) corresponding to (x, y) in src */ \ + size_t x_disp = ROTATION_X_DISP(x, y, dst); \ + size_t y_disp = ROTATION_Y_DISP(x, y, dst); \ + \ + ip = (const uint##bits_per_pixel##_t*) \ + MATRIX_ELEMENT(src->data, y, x, \ + src->stride, bytes_per_pixel); \ + op = (uint##bits_per_pixel##_t*) \ + MATRIX_ELEMENT(dst->data, y_disp, x_disp, \ + dst->stride, bytes_per_pixel); \ + *op = *ip; \ + } \ + } \ +} + +void surface_ROTATION_transform(gr_surface dst_ptr, const gr_surface src_ptr, + size_t num_bytes_per_pixel) +{ + GGLSurface *dst = (GGLSurface*) dst_ptr; + const GGLSurface *src = (GGLSurface*) src_ptr; + + /* Handle duplicated code via a macro. + * This is currently used for rotating surfaces of graphical resources + * (32-bit pixel format) and of font glyphs (8-bit pixel format). + * If you need to add handling of other pixel formats feel free to do so. + */ + if (num_bytes_per_pixel == 4) { + DO_MATRIX_ROTATION(32, 4); + } else if (num_bytes_per_pixel == 1) { + DO_MATRIX_ROTATION(8, 1); + } +} |