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trezor-firmware/core/embed/lib/gfx_draw.c
2024-05-17 09:17:37 +02:00

277 lines
6.7 KiB
C

/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <display.h>
#include "display_draw.h"
#include "fonts/fonts.h"
#include "gfx_draw.h"
typedef struct {
int16_t dst_x;
int16_t dst_y;
int16_t src_x;
int16_t src_y;
int16_t width;
int16_t height;
} gfx_clip_t;
static inline gfx_clip_t gfx_clip(gfx_rect_t dst, const gfx_bitmap_t* bitmap) {
int16_t dst_x = dst.x0;
int16_t dst_y = dst.y0;
int16_t src_x = 0;
int16_t src_y = 0;
if (bitmap != NULL) {
src_x += bitmap->offset.x;
src_y += bitmap->offset.y;
// Normalize negative x-offset of bitmap
if (src_x < 0) {
dst_x -= src_x;
src_x = 0;
}
// Normalize negative y-offset of src bitmap
if (src_y < 0) {
dst_y -= src_y;
src_y = 0;
}
}
// Normalize negative top-left of destination rectangle
if (dst_x < 0) {
src_x -= dst_x;
dst_x = 0;
}
if (dst_y < 0) {
src_y -= dst_y;
dst_y = 0;
}
// Calculate dimension of effective rectangle
int16_t width = MIN(DISPLAY_RESX, dst.x1) - dst_x;
int16_t height = MIN(DISPLAY_RESY, dst.y1) - dst_y;
if (bitmap != NULL) {
width = MIN(width, bitmap->size.x - src_x);
height = MIN(height, bitmap->size.y - src_y);
}
gfx_clip_t clip = {
.dst_x = dst_x,
.dst_y = dst_y,
.src_x = src_x,
.src_y = src_y,
.width = width,
.height = height,
};
return clip;
}
void gfx_clear(void) {
gfx_bitblt_t bb = {
// Destination bitmap
.height = DISPLAY_RESX,
.width = DISPLAY_RESY,
.dst_row = NULL,
.dst_x = 0,
.dst_y = 0,
.dst_stride = 0,
// Source bitmap
.src_fg = 0,
.src_alpha = 255,
};
display_fill(&bb);
}
void gfx_draw_bar(gfx_rect_t rect, gfx_color_t color) {
gfx_clip_t clip = gfx_clip(rect, NULL);
if (clip.width <= 0 || clip.height <= 0) {
return;
}
gfx_bitblt_t bb = {
// Destination bitmap
.height = clip.height,
.width = clip.width,
.dst_row = NULL,
.dst_x = clip.dst_x,
.dst_y = clip.dst_y,
.dst_stride = 0,
// Source bitmap
.src_fg = color,
.src_alpha = 255,
};
display_fill(&bb);
}
void gfx_draw_bitmap(gfx_rect_t rect, const gfx_bitmap_t* bitmap) {
gfx_clip_t clip = gfx_clip(rect, bitmap);
if (clip.width <= 0 || clip.height <= 0) {
return;
}
gfx_bitblt_t bb = {
// Destination bitmap
.height = clip.height,
.width = clip.width,
.dst_row = NULL,
.dst_x = clip.dst_x,
.dst_y = clip.dst_y,
.dst_stride = 0,
// Source bitmap
.src_row = (uint8_t*)bitmap->ptr + bitmap->stride * clip.src_y,
.src_x = clip.src_x,
.src_y = clip.src_y,
.src_stride = bitmap->stride,
.src_fg = bitmap->fg_color,
.src_bg = bitmap->bg_color,
.src_alpha = 255,
};
// Currently, we use `gfx_draw_bitmap` exclusively for text rendering.
// Therefore, we are including the variant of `display_copy_xxx()` that is
// specifically needed for drawing glyphs in the format we are using
// to save some space in the flash memory.
#if TREZOR_FONT_BPP == 1
if (bitmap->format == GFX_FORMAT_MONO1P) {
display_copy_mono1p(&bb);
}
#endif
#if TREZOR_FONT_BPP == 4
if (bitmap->format == GFX_FORMAT_MONO4) {
display_copy_mono4(&bb);
}
#endif
}
#if TREZOR_FONT_BPP == 1
#define GLYPH_FORMAT GFX_FORMAT_MONO1P
#define GLYPH_STRIDE(w) (((w) + 7) / 8)
#elif TREZOR_FONT_BPP == 2
#error Unsupported TREZOR_FONT_BPP value
#define GLYPH_FORMAT GFX_FORMAT_MONO2
#define GLYPH_STRIDE(w) (((w) + 3) / 4)
#elif TREZOR_FONT_BPP == 4
#define GLYPH_FORMAT GFX_FORMAT_MONO4
#define GLYPH_STRIDE(w) (((w) + 1) / 2)
#elif TREZOR_FONT_BPP == 8
#error Unsupported TREZOR_FONT_BPP value
#define GLYPH_FORMAT GFX_FORMAT_MONO8
#define GLYPH_STRIDE(w) (w)
#else
#error Unsupported TREZOR_FONT_BPP value
#endif
#define GLYPH_WIDTH(g) ((g)[0])
#define GLYPH_HEIGHT(g) ((g)[1])
#define GLYPH_ADVANCE(g) ((g)[2])
#define GLYPH_BEARING_X(g) ((g)[3])
#define GLYPH_BEARING_Y(g) ((g)[4])
#define GLYPH_DATA(g) ((void*)&(g)[5])
void gfx_draw_text(gfx_offset_t pos, const char* text, size_t maxlen,
const gfx_text_attr_t* attr) {
if (text == NULL) {
return;
}
gfx_bitmap_t bitmap = {
.format = GLYPH_FORMAT,
.fg_color = attr->fg_color,
.bg_color = attr->bg_color,
};
int max_height = font_max_height(attr->font);
int baseline = font_baseline(attr->font);
for (int i = 0; i < maxlen; i++) {
uint8_t ch = (uint8_t)text[i];
if (ch == 0 || pos.x >= DISPLAY_RESX) {
break;
}
const uint8_t* glyph = font_get_glyph(attr->font, ch);
if (glyph == NULL) {
continue;
}
bitmap.ptr = GLYPH_DATA(glyph);
bitmap.stride = GLYPH_STRIDE(GLYPH_WIDTH(glyph));
bitmap.size.x = GLYPH_WIDTH(glyph);
bitmap.size.y = GLYPH_HEIGHT(glyph);
bitmap.offset.x = -GLYPH_BEARING_X(glyph);
bitmap.offset.y = -(max_height - baseline - GLYPH_BEARING_Y(glyph));
gfx_draw_bitmap(gfx_rect(pos.x, pos.y, DISPLAY_RESX, DISPLAY_RESY),
&bitmap);
pos.x += GLYPH_ADVANCE(glyph);
}
}
// ===============================================================
// emulation of legacy functions
void display_clear(void) { gfx_clear(); }
void display_bar(int x, int y, int w, int h, uint16_t c) {
gfx_draw_bar(gfx_rect_wh(x, y, w, h), c);
}
void display_text(int x, int y, const char* text, int textlen, int font,
uint16_t fg_color, uint16_t bg_color) {
gfx_text_attr_t attr = {
.font = font,
.fg_color = fg_color,
.bg_color = bg_color,
};
size_t maxlen = textlen < 0 ? UINT32_MAX : textlen;
gfx_draw_text(gfx_offset(x, y), text, maxlen, &attr);
}
void display_text_center(int x, int y, const char* text, int textlen, int font,
uint16_t fg_color, uint16_t bg_color) {
gfx_text_attr_t attr = {
.font = font,
.fg_color = fg_color,
.bg_color = bg_color,
};
size_t maxlen = textlen < 0 ? UINT32_MAX : textlen;
int w = font_text_width(font, text, textlen);
gfx_draw_text(gfx_offset(x - w / 2, y), text, maxlen, &attr);
}