mirror of
https://github.com/trezor/trezor-firmware.git
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112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "gfx_bitblt.h"
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void gfx_mono8_fill(const gfx_bitblt_t* bb) {
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uint8_t* dst_ptr = (uint8_t*)bb->dst_row + bb->dst_x;
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uint16_t height = bb->height;
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uint8_t fg = gfx_color_lum(bb->src_fg);
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while (height-- > 0) {
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for (int x = 0; x < bb->width; x++) {
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dst_ptr[x] = fg;
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}
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dst_ptr += bb->dst_stride / sizeof(*dst_ptr);
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}
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}
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void gfx_mono8_copy_mono1p(const gfx_bitblt_t* bb) {
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uint8_t* dst_ptr = (uint8_t*)bb->dst_row + bb->dst_x;
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uint8_t* src = (uint8_t*)bb->src_row;
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uint16_t src_ofs = bb->src_stride * bb->src_y + bb->src_x;
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uint16_t height = bb->height;
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uint8_t fg = gfx_color_lum(bb->src_fg);
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uint8_t bg = gfx_color_lum(bb->src_bg);
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while (height-- > 0) {
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for (int x = 0; x < bb->width; x++) {
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uint8_t mask = 1 << (7 - ((src_ofs + x) & 7));
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uint8_t data = src[(src_ofs + x) / 8];
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dst_ptr[x] = (data & mask) ? fg : bg;
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}
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dst_ptr += bb->dst_stride / sizeof(*dst_ptr);
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src_ofs += bb->src_stride;
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}
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}
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void gfx_mono8_copy_mono4(const gfx_bitblt_t* bb) {
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uint8_t* dst_ptr = (uint8_t*)bb->dst_row + bb->dst_x;
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uint8_t* src_row = (uint8_t*)bb->src_row;
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uint16_t height = bb->height;
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uint8_t fg = gfx_color_lum(bb->src_fg);
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uint8_t bg = gfx_color_lum(bb->src_bg);
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while (height-- > 0) {
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for (int x = 0; x < bb->width; x++) {
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uint8_t src_data = src_row[(x + bb->src_x) / 2];
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uint8_t src_lum = (x + bb->src_x) & 1 ? src_data >> 4 : src_data & 0xF;
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dst_ptr[x] = (fg * src_lum + bg * (15 - src_lum)) / 15;
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}
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dst_ptr += bb->dst_stride / sizeof(*dst_ptr);
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src_row += bb->src_stride / sizeof(*src_row);
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}
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}
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void gfx_mono8_blend_mono1p(const gfx_bitblt_t* bb) {
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uint8_t* dst_ptr = (uint8_t*)bb->dst_row + bb->dst_x;
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uint8_t* src = (uint8_t*)bb->src_row;
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uint16_t src_ofs = bb->src_stride * bb->src_y + bb->src_x;
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uint16_t height = bb->height;
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uint8_t fg = gfx_color_lum(bb->src_fg);
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while (height-- > 0) {
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for (int x = 0; x < bb->width; x++) {
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uint8_t mask = 1 << (7 - ((src_ofs + x) & 7));
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uint8_t data = src[(src_ofs + x) / 8];
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dst_ptr[x] = (data & mask) ? fg : dst_ptr[x];
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}
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dst_ptr += bb->dst_stride / sizeof(*dst_ptr);
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src_ofs += bb->src_stride;
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}
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}
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void gfx_mono8_blend_mono4(const gfx_bitblt_t* bb) {
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uint8_t* dst_ptr = (uint8_t*)bb->dst_row + bb->dst_x;
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uint8_t* src_row = (uint8_t*)bb->src_row;
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uint16_t height = bb->height;
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uint8_t fg = gfx_color_lum(bb->src_fg);
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while (height-- > 0) {
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for (int x = 0; x < bb->width; x++) {
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uint8_t src_data = src_row[(x + bb->src_x) / 2];
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uint8_t src_alpha = (x + bb->src_x) & 1 ? src_data >> 4 : src_data & 0x0F;
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src_alpha = src_alpha * bb->src_alpha / 15;
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dst_ptr[x] = (fg * src_alpha + dst_ptr[x] * (255 - src_alpha));
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}
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dst_ptr += bb->dst_stride / sizeof(*dst_ptr);
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src_row += bb->src_stride / sizeof(*src_row);
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}
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}
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