From 1f55909081b86e560e43234a1e49e9ffe1ada4af Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Wed, 12 May 2004 22:39:39 +0000 Subject: gray_drawbitmap() changed to use the same bitmap format as lcd_bitmap(). Also made the bound checks a lot more safe. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4612 a1c6a512-1295-4272-9138-f99709370657 --- apps/plugins/grayscale.c | 176 +++++++++++++++++++++++++++-------------------- 1 file changed, 102 insertions(+), 74 deletions(-) diff --git a/apps/plugins/grayscale.c b/apps/plugins/grayscale.c index 2a425852d6..fe50a5226e 100644 --- a/apps/plugins/grayscale.c +++ b/apps/plugins/grayscale.c @@ -334,7 +334,9 @@ int gray_init_buffer(unsigned char *gbuf, int gbuf_size, int width, int possible_depth, plane_size; int i, j; - if (width > LCD_WIDTH || bheight > (LCD_HEIGHT >> 3) || depth < 1) + if ((unsigned) width > LCD_WIDTH + || (unsigned) bheight > (LCD_HEIGHT >> 3) + || depth < 1) return 0; while ((unsigned long)gbuf & 3) /* the buffer has to be long aligned */ @@ -569,7 +571,7 @@ void gray_scroll_left(int count, bool black_border) unsigned char *src, *dest; unsigned char filler; - if (graybuf == NULL || count >= graybuf->width) + if (graybuf == NULL || (unsigned) count >= (unsigned) graybuf->width) return; if (black_border) @@ -606,7 +608,7 @@ void gray_scroll_right(int count, bool black_border) unsigned char *src, *dest; unsigned char filler; - if (graybuf == NULL || count >= graybuf->width) + if (graybuf == NULL || (unsigned) count >= (unsigned) graybuf->width) return; if (black_border) @@ -850,8 +852,10 @@ void gray_scroll_down1(bool black_border) */ void gray_drawpixel(int x, int y, int brightness) { - if (graybuf == NULL || x >= graybuf->width || y >= graybuf->height - || brightness > 255) + if (graybuf == NULL + || (unsigned) x >= (unsigned) graybuf->width + || (unsigned) y >= (unsigned) graybuf->height + || (unsigned) brightness > 255) return; graypixel(x, y, graybuf->bitpattern[(brightness @@ -865,7 +869,9 @@ void gray_drawpixel(int x, int y, int brightness) */ void gray_invertpixel(int x, int y) { - if (graybuf == NULL || x >= graybuf->width || y >= graybuf->height) + if (graybuf == NULL + || (unsigned) x >= (unsigned) graybuf->width + || (unsigned) y >= (unsigned) graybuf->height) return; grayinvertmasked(x, (y >> 3), 1 << (y & 7)); @@ -885,8 +891,12 @@ void gray_drawline(int x1, int y1, int x2, int y2, int brightness) int y, yinc1, yinc2; unsigned long pattern; - if (graybuf == NULL || x1 >= graybuf->width || y1 >= graybuf->height - || x2 >= graybuf->width || y2 >= graybuf->height|| brightness > 255) + if (graybuf == NULL + || (unsigned) x1 >= (unsigned) graybuf->width + || (unsigned) y1 >= (unsigned) graybuf->height + || (unsigned) x2 >= (unsigned) graybuf->width + || (unsigned) y2 >= (unsigned) graybuf->height + || (unsigned) brightness > 255) return; pattern = graybuf->bitpattern[(brightness * (graybuf->depth + 1)) >> 8]; @@ -966,8 +976,11 @@ void gray_invertline(int x1, int y1, int x2, int y2) int x, xinc1, xinc2; int y, yinc1, yinc2; - if (graybuf == NULL || x1 >= graybuf->width || y1 >= graybuf->height - || x2 >= graybuf->width || y2 >= graybuf->height) + if (graybuf == NULL + || (unsigned) x1 >= (unsigned) graybuf->width + || (unsigned) y1 >= (unsigned) graybuf->height + || (unsigned) x2 >= (unsigned) graybuf->width + || (unsigned) y2 >= (unsigned) graybuf->height) return; deltax = abs(x2 - x1); @@ -1041,8 +1054,12 @@ void gray_drawrect(int x1, int y1, int x2, int y2, int brightness) int x, y; unsigned long pattern; - if (graybuf == NULL || x1 >= graybuf->width || y1 >= graybuf->height - || x2 >= graybuf->width || y2 >= graybuf->height|| brightness > 255) + if (graybuf == NULL + || (unsigned) x1 >= (unsigned) graybuf->width + || (unsigned) y1 >= (unsigned) graybuf->height + || (unsigned) x2 >= (unsigned) graybuf->width + || (unsigned) y2 >= (unsigned) graybuf->height + || (unsigned) brightness > 255) return; pattern = graybuf->bitpattern[(brightness * (graybuf->depth + 1)) >> 8]; @@ -1082,8 +1099,12 @@ void gray_fillrect(int x1, int y1, int x2, int y2, int brightness) int x, y; unsigned long pattern; - if (graybuf == NULL || x1 >= graybuf->width || y1 >= graybuf->height - || x2 >= graybuf->width || y2 >= graybuf->height || brightness > 255) + if (graybuf == NULL + || (unsigned) x1 >= (unsigned) graybuf->width + || (unsigned) y1 >= (unsigned) graybuf->height + || (unsigned) x2 >= (unsigned) graybuf->width + || (unsigned) y2 >= (unsigned) graybuf->height + || (unsigned) brightness > 255) return; if (y1 > y2) @@ -1121,8 +1142,11 @@ void gray_invertrect(int x1, int y1, int x2, int y2) int x, yb, yb1, yb2; unsigned char mask; - if (graybuf == NULL || x1 >= graybuf->width || y1 >= graybuf->height - || x2 >= graybuf->width || y2 >= graybuf->height) + if (graybuf == NULL + || (unsigned) x1 >= (unsigned) graybuf->width + || (unsigned) y1 >= (unsigned) graybuf->height + || (unsigned) x2 >= (unsigned) graybuf->width + || (unsigned) y2 >= (unsigned) graybuf->height) return; if (y1 > y2) @@ -1174,7 +1198,7 @@ void gray_invertrect(int x1, int y1, int x2, int y2) * A grayscale bitmap contains one byte for every pixel that defines the * brightness of the pixel (0..255). Bytes are read in row-major order. * The parameter is useful if you want to show only a part of a - * bitmap. It should always be set to the "line length" of the bitmap, so + * bitmap. It should always be set to the "row length" of the bitmap, so * for displaying the whole bitmap, nx == stride. */ void gray_drawgraymap(unsigned char *src, int x, int y, int nx, int ny, @@ -1183,7 +1207,9 @@ void gray_drawgraymap(unsigned char *src, int x, int y, int nx, int ny, int xi, yi; unsigned char *row; - if (graybuf == NULL || x >= graybuf->width || y >= graybuf->height) + if (graybuf == NULL + || (unsigned) x >= (unsigned) graybuf->width + || (unsigned) y >= (unsigned) graybuf->height) return; if ((y + ny) >= graybuf->height) /* clip bottom */ @@ -1205,15 +1231,20 @@ void gray_drawgraymap(unsigned char *src, int x, int y, int nx, int ny, } /* Display a bitmap with specific foreground and background gray values + * + * This (now) uses the same bitmap format as the core b&w graphics routines, + * so you can use bmp2rb to generate bitmaps for use with this function as + * well. * * A bitmap contains one bit for every pixel that defines if that pixel is - * foreground (1) or background (0). Bytes are read in row-major order, MSB - * first. A row consists of an integer number of bytes, extra bits past the - * right margin are ignored. + * foreground (1) or background (0). Bits within a byte are arranged + * vertically, LSB at top. + * The bytes are stored in row-major order, with byte 0 being top left, + * byte 1 2nd from left etc. The first row of bytes defines pixel rows + * 0..7, the second row defines pixel row 8..15 etc. + * * The parameter is useful if you want to show only a part of a - * bitmap. It should always be set to the "line length" of the bitmap. - * Beware that this is counted in bytes, so nx == 8 * stride for the whole - * bitmap. + * bitmap. It should always be set to the "row length" of the bitmap. * * If draw_bg is false, only foreground pixels are drawn, so the background * is transparent. In this case bg_brightness is ignored. @@ -1222,15 +1253,18 @@ void gray_drawbitmap(unsigned char *src, int x, int y, int nx, int ny, int stride, bool draw_bg, int fg_brightness, int bg_brightness) { - int xi, yi, i; + int xi, dy; + int bits = 0; /* Have to initialize to prevent warning */ unsigned long fg_pattern, bg_pattern; - unsigned long bits = 0; /* Have to initialize to prevent warning */ - unsigned char *row; + unsigned char *col; - if (graybuf == NULL || x >= graybuf->width || y >= graybuf->height - || fg_brightness > 255 || bg_brightness > 255) + if (graybuf == NULL + || (unsigned) x >= (unsigned) graybuf->width + || (unsigned) y >= (unsigned) graybuf->height + || (unsigned) fg_brightness > 255 + || (unsigned) bg_brightness > 255) return; - + if ((y + ny) >= graybuf->height) /* clip bottom */ ny = graybuf->height - y; @@ -1243,25 +1277,24 @@ void gray_drawbitmap(unsigned char *src, int x, int y, int nx, int ny, bg_pattern = graybuf->bitpattern[(bg_brightness * (graybuf->depth + 1)) >> 8]; - for (yi = y; yi < y + ny; yi++) + for (xi = x; xi < x + nx; xi++) { - i = 0; - row = src; - src += stride; - for (xi = x; xi < x + nx; xi++) + col = src++; + for (dy = 0; dy < ny; dy++) { - if (i == 0) /* get next 8 bits */ - bits = (unsigned long)(*row++); - - if (bits & 0x80) - graypixel(xi, yi, fg_pattern); + if (!(dy & 7)) /* get next 8 bits */ + { + bits = (int)(*col); + col += stride; + } + + if (bits & 0x01) + graypixel(xi, y + dy, fg_pattern); else if (draw_bg) - graypixel(xi, yi, bg_pattern); + graypixel(xi, y + dy, bg_pattern); - bits <<= 1; - i++; - i &= 7; + bits >>= 1; } } } @@ -1279,41 +1312,36 @@ int main(void) bool black_border; static unsigned char rockbox[] = { - /* .... .... .... .... .... .... .... .... .... .... ... - * .### #... ###. ..## #..# ...# .### #... ###. .#.. .#. - * .#.. .#.# ...# .#.. .#.# ..#. .#.. .#.# ...# ..#. #.. - * .### #..# ...# .#.. ...# ##.. .### #..# ...# ...# ... - * .#.. #..# ...# .#.. .#.# ..#. .#.. .#.# ...# ..#. #.. - * .#.. .#.. ###. ..## #..# ...# .### #... ###. .#.. .#. - * .... .... .... .... .... .... .... .... .... .... ... + /* ........................................... + * .####...###...###..#...#.####...###..#...#. + * .#...#.#...#.#...#.#..#..#...#.#...#..#.#.. + * .####..#...#.#.....###...####..#...#...#... + * .#..#..#...#.#...#.#..#..#...#.#...#..#.#.. + * .#...#..###...###..#...#.####...###..#...#. + * ........................................... * 43 x 7 pixel, 1 bpp */ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x78, 0xE3, 0x91, 0x78, 0xE4, 0x40, - 0x45, 0x14, 0x52, 0x45, 0x12, 0x80, - 0x79, 0x14, 0x1C, 0x79, 0x11, 0x00, - 0x49, 0x14, 0x52, 0x45, 0x12, 0x80, - 0x44, 0xE3, 0x91, 0x78, 0xE4, 0x40, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 + 0x00, 0x3E, 0x0A, 0x0A, 0x1A, 0x24, 0x00, 0x1C, 0x22, 0x22, + 0x22, 0x1C, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x14, 0x00, 0x3E, + 0x08, 0x08, 0x14, 0x22, 0x00, 0x3E, 0x2A, 0x2A, 0x2A, 0x14, + 0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x22, 0x14, 0x08, + 0x14, 0x22, 0x00 }; static unsigned char showing[] = { - /* .... .... .... .... .... .... .... .... .... ... - * ..## ##.# ...# ..## #..# ...# .#.# ...# ..## ##. - * .#.. ...# ...# .#.. .#.# ...# .#.# #..# .#.. ... - * ..## #..# #### .#.. .#.# .#.# .#.# .#.# .#.. ##. - * .... .#.# ...# .#.. .#.# .#.# .#.# ..## .#.. .#. - * .### #..# ...# ..## #... #.#. .#.# ...# ..## ##. - * .... .... .... .... .... .... .... .... .... ... + /* ....................................... + * ..####.#...#..###..#...#.#.#...#..####. + * .#.....#...#.#...#.#...#.#.##..#.#..... + * ..###..#####.#...#.#.#.#.#.#.#.#.#..##. + * .....#.#...#.#...#.#.#.#.#.#..##.#...#. + * .####..#...#..###...#.#..#.#...#..####. + * ....................................... * 39 x 7 pixel, 1 bpp */ - 0x00, 0x00, 0x00, 0x00, 0x00, - 0x3D, 0x13, 0x91, 0x51, 0x3C, - 0x41, 0x14, 0x51, 0x59, 0x40, - 0x39, 0xF4, 0x55, 0x55, 0x4C, - 0x05, 0x14, 0x55, 0x53, 0x44, - 0x79, 0x13, 0x8A, 0x51, 0x3C, - 0x00, 0x00, 0x00, 0x00, 0x00 + 0x00, 0x24, 0x2A, 0x2A, 0x2A, 0x12, 0x00, 0x3E, 0x08, 0x08, + 0x08, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x1E, + 0x20, 0x18, 0x20, 0x1E, 0x00, 0x3E, 0x00, 0x3E, 0x04, 0x08, + 0x10, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x2A, 0x3A, 0x00 }; static unsigned char grayscale_gray[] = { @@ -1405,8 +1433,8 @@ int main(void) gray_invertline(13, 27, 98, 27); /* invert a line */ /* show bitmaps (1 bit and 8 bit) */ - gray_drawbitmap(rockbox, 14, 13, 43, 7, 6, true, 255, 100); /* opaque */ - gray_drawbitmap(showing, 58, 13, 39, 7, 5, false, 0, 0); /* transparent */ + gray_drawbitmap(rockbox, 14, 13, 43, 7, 43, true, 255, 100); /* opaque */ + gray_drawbitmap(showing, 58, 13, 39, 7, 39, false, 0, 0); /* transparent */ gray_drawgraymap(grayscale_gray, 28, 35, 55, 7, 55); time = *rb->current_tick - time; /* end time measurement */ -- cgit v1.2.3