/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "graphics.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory>
#include "graphics_adf.h"
#include "graphics_drm.h"
#include "graphics_fbdev.h"
#include "minui/minui.h"
static GRFont* gr_font = nullptr;
static MinuiBackend* gr_backend = nullptr;
static int overscan_percent = OVERSCAN_PERCENT;
static int overscan_offset_x = 0;
static int overscan_offset_y = 0;
static uint32_t gr_current = ~0;
static constexpr uint32_t alpha_mask = 0xff000000;
// gr_draw is owned by backends.
static const GRSurface* gr_draw = nullptr;
static GRRotation rotation = GRRotation::NONE;
static bool outside(int x, int y) {
auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
return x < 0 || x >= (swapped ? gr_draw->height : gr_draw->width) || y < 0 ||
y >= (swapped ? gr_draw->width : gr_draw->height);
}
const GRFont* gr_sys_font() {
return gr_font;
}
int gr_measure(const GRFont* font, const char* s) {
if (font == nullptr) {
return -1;
}
return font->char_width * strlen(s);
}
int gr_font_size(const GRFont* font, int* x, int* y) {
if (font == nullptr) {
return -1;
}
*x = font->char_width;
*y = font->char_height;
return 0;
}
// Blends gr_current onto pix value, assumes alpha as most significant byte.
static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) {
if (alpha == 255) return gr_current;
if (alpha == 0) return pix;
uint32_t pix_r = pix & 0xff;
uint32_t pix_g = pix & 0xff00;
uint32_t pix_b = pix & 0xff0000;
uint32_t cur_r = gr_current & 0xff;
uint32_t cur_g = gr_current & 0xff00;
uint32_t cur_b = gr_current & 0xff0000;
uint32_t out_r = (pix_r * (255 - alpha) + cur_r * alpha) / 255;
uint32_t out_g = (pix_g * (255 - alpha) + cur_g * alpha) / 255;
uint32_t out_b = (pix_b * (255 - alpha) + cur_b * alpha) / 255;
return (out_r & 0xff) | (out_g & 0xff00) | (out_b & 0xff0000) | (gr_current & 0xff000000);
}
// Increments pixel pointer right, with current rotation.
static void incr_x(uint32_t** p, int row_pixels) {
if (rotation == GRRotation::LEFT) {
*p = *p - row_pixels;
} else if (rotation == GRRotation::RIGHT) {
*p = *p + row_pixels;
} else if (rotation == GRRotation::DOWN) {
*p = *p - 1;
} else { // GRRotation::NONE
*p = *p + 1;
}
}
// Increments pixel pointer down, with current rotation.
static void incr_y(uint32_t** p, int row_pixels) {
if (rotation == GRRotation::LEFT) {
*p = *p + 1;
} else if (rotation == GRRotation::RIGHT) {
*p = *p - 1;
} else if (rotation == GRRotation::DOWN) {
*p = *p - row_pixels;
} else { // GRRotation::NONE
*p = *p + row_pixels;
}
}
// Returns pixel pointer at given coordinates with rotation adjustment.
static uint32_t* pixel_at(const GRSurface* surf, int x, int y, int row_pixels) {
switch (rotation) {
case GRRotation::NONE:
return reinterpret_cast<uint32_t*>(surf->data) + y * row_pixels + x;
case GRRotation::RIGHT:
return reinterpret_cast<uint32_t*>(surf->data) + x * row_pixels + (surf->width - y);
case GRRotation::DOWN:
return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - y) * row_pixels +
(surf->width - 1 - x);
case GRRotation::LEFT:
return reinterpret_cast<uint32_t*>(surf->data) + (surf->height - 1 - x) * row_pixels + y;
default:
printf("invalid rotation %d", static_cast<int>(rotation));
}
return nullptr;
}
static void text_blend(uint8_t* src_p, int src_row_bytes, uint32_t* dst_p, int dst_row_pixels,
int width, int height) {
uint8_t alpha_current = static_cast<uint8_t>((alpha_mask & gr_current) >> 24);
for (int j = 0; j < height; ++j) {
uint8_t* sx = src_p;
uint32_t* px = dst_p;
for (int i = 0; i < width; ++i, incr_x(&px, dst_row_pixels)) {
uint8_t a = *sx++;
if (alpha_current < 255) a = (static_cast<uint32_t>(a) * alpha_current) / 255;
*px = pixel_blend(a, *px);
}
src_p += src_row_bytes;
incr_y(&dst_p, dst_row_pixels);
}
}
void gr_text(const GRFont* font, int x, int y, const char* s, bool bold) {
if (!font || !font->texture || (gr_current & alpha_mask) == 0) return;
if (font->texture->pixel_bytes != 1) {
printf("gr_text: font has wrong format\n");
return;
}
bold = bold && (font->texture->height != font->char_height);
x += overscan_offset_x;
y += overscan_offset_y;
unsigned char ch;
while ((ch = *s++)) {
if (outside(x, y) || outside(x + font->char_width - 1, y + font->char_height - 1)) break;
if (ch < ' ' || ch > '~') {
ch = '?';
}
int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
uint8_t* src_p = font->texture->data + ((ch - ' ') * font->char_width) +
(bold ? font->char_height * font->texture->row_bytes : 0);
uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels);
text_blend(src_p, font->texture->row_bytes, dst_p, row_pixels, font->char_width,
font->char_height);
x += font->char_width;
}
}
void gr_texticon(int x, int y, GRSurface* icon) {
if (icon == nullptr) return;
if (icon->pixel_bytes != 1) {
printf("gr_texticon: source has wrong format\n");
return;
}
x += overscan_offset_x;
y += overscan_offset_y;
if (outside(x, y) || outside(x + icon->width - 1, y + icon->height - 1)) return;
int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
uint8_t* src_p = icon->data;
uint32_t* dst_p = pixel_at(gr_draw, x, y, row_pixels);
text_blend(src_p, icon->row_bytes, dst_p, row_pixels, icon->width, icon->height);
}
void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
uint32_t r32 = r, g32 = g, b32 = b, a32 = a;
#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
gr_current = (a32 << 24) | (r32 << 16) | (g32 << 8) | b32;
#else
gr_current = (a32 << 24) | (b32 << 16) | (g32 << 8) | r32;
#endif
}
void gr_clear() {
if ((gr_current & 0xff) == ((gr_current >> 8) & 0xff) &&
(gr_current & 0xff) == ((gr_current >> 16) & 0xff) &&
(gr_current & 0xff) == ((gr_current >> 24) & 0xff) &&
gr_draw->row_bytes == gr_draw->width * gr_draw->pixel_bytes) {
memset(gr_draw->data, gr_current & 0xff, gr_draw->height * gr_draw->row_bytes);
} else {
uint32_t* px = reinterpret_cast<uint32_t*>(gr_draw->data);
int row_diff = gr_draw->row_bytes / gr_draw->pixel_bytes - gr_draw->width;
for (int y = 0; y < gr_draw->height; ++y) {
for (int x = 0; x < gr_draw->width; ++x) {
*px++ = gr_current;
}
px += row_diff;
}
}
}
void gr_fill(int x1, int y1, int x2, int y2) {
x1 += overscan_offset_x;
y1 += overscan_offset_y;
x2 += overscan_offset_x;
y2 += overscan_offset_y;
if (outside(x1, y1) || outside(x2 - 1, y2 - 1)) return;
int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
uint32_t* p = pixel_at(gr_draw, x1, y1, row_pixels);
uint8_t alpha = static_cast<uint8_t>(((gr_current & alpha_mask) >> 24));
if (alpha > 0) {
for (int y = y1; y < y2; ++y) {
uint32_t* px = p;
for (int x = x1; x < x2; ++x) {
*px = pixel_blend(alpha, *px);
incr_x(&px, row_pixels);
}
incr_y(&p, row_pixels);
}
}
}
void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
if (source == nullptr) return;
if (gr_draw->pixel_bytes != source->pixel_bytes) {
printf("gr_blit: source has wrong format\n");
return;
}
dx += overscan_offset_x;
dy += overscan_offset_y;
if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return;
if (rotation != GRRotation::NONE) {
int src_row_pixels = source->row_bytes / source->pixel_bytes;
int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
uint32_t* src_py = reinterpret_cast<uint32_t*>(source->data) + sy * source->row_bytes / 4 + sx;
uint32_t* dst_py = pixel_at(gr_draw, dx, dy, row_pixels);
for (int y = 0; y < h; y += 1) {
uint32_t* src_px = src_py;
uint32_t* dst_px = dst_py;
for (int x = 0; x < w; x += 1) {
*dst_px = *src_px++;
incr_x(&dst_px, row_pixels);
}
src_py += src_row_pixels;
incr_y(&dst_py, row_pixels);
}
} else {
unsigned char* src_p = source->data + sy * source->row_bytes + sx * source->pixel_bytes;
unsigned char* dst_p = gr_draw->data + dy * gr_draw->row_bytes + dx * gr_draw->pixel_bytes;
for (int i = 0; i < h; ++i) {
memcpy(dst_p, src_p, w * source->pixel_bytes);
src_p += source->row_bytes;
dst_p += gr_draw->row_bytes;
}
}
}
unsigned int gr_get_width(const GRSurface* surface) {
if (surface == nullptr) {
return 0;
}
return surface->width;
}
unsigned int gr_get_height(const GRSurface* surface) {
if (surface == nullptr) {
return 0;
}
return surface->height;
}
int gr_init_font(const char* name, GRFont** dest) {
GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
if (font == nullptr) {
return -1;
}
int res = res_create_alpha_surface(name, &(font->texture));
if (res < 0) {
free(font);
return res;
}
// The font image should be a 96x2 array of character images. The
// columns are the printable ASCII characters 0x20 - 0x7f. The
// top row is regular text; the bottom row is bold.
font->char_width = font->texture->width / 96;
font->char_height = font->texture->height / 2;
*dest = font;
return 0;
}
void gr_flip() {
gr_draw = gr_backend->Flip();
}
int gr_init() {
int ret = gr_init_font("font", &gr_font);
if (ret != 0) {
printf("Failed to init font: %d, continuing graphic backend initialization without font file\n",
ret);
}
auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendAdf>() };
gr_draw = backend->Init();
if (!gr_draw) {
backend = std::make_unique<MinuiBackendDrm>();
gr_draw = backend->Init();
}
if (!gr_draw) {
backend = std::make_unique<MinuiBackendFbdev>();
gr_draw = backend->Init();
}
if (!gr_draw) {
return -1;
}
gr_backend = backend.release();
overscan_offset_x = gr_draw->width * overscan_percent / 100;
overscan_offset_y = gr_draw->height * overscan_percent / 100;
gr_flip();
gr_flip();
if (!gr_draw) {
printf("gr_init: gr_draw becomes nullptr after gr_flip\n");
return -1;
}
#define __STRINGIFY(x) #x
#define STRINGIFY(x) __STRINGIFY(x)
std::string rotation_str(STRINGIFY(DEFAULT_ROTATION));
if (rotation_str == "ROTATION_RIGHT") {
gr_rotate(GRRotation::RIGHT);
} else if (rotation_str == "ROTATION_DOWN") {
gr_rotate(GRRotation::DOWN);
} else if (rotation_str == "ROTATION_LEFT") {
gr_rotate(GRRotation::LEFT);
} else { // "ROTATION_NONE"
gr_rotate(GRRotation::NONE);
}
if (gr_draw->pixel_bytes != 4) {
printf("gr_init: Only 4-byte pixel formats supported\n");
}
return 0;
}
void gr_exit() {
delete gr_backend;
gr_backend = nullptr;
delete gr_font;
gr_font = nullptr;
}
int gr_fb_width() {
return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
? gr_draw->height - 2 * overscan_offset_y
: gr_draw->width - 2 * overscan_offset_x;
}
int gr_fb_height() {
return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
? gr_draw->width - 2 * overscan_offset_x
: gr_draw->height - 2 * overscan_offset_y;
}
void gr_fb_blank(bool blank) {
gr_backend->Blank(blank);
}
void gr_rotate(GRRotation rot) {
rotation = rot;
}