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435 lines
13 KiB
435 lines
13 KiB
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "graphics.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <memory>
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#include <android-base/properties.h>
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#include "graphics_drm.h"
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#include "graphics_fbdev.h"
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#include "minui/minui.h"
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static GRFont* gr_font = nullptr;
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static MinuiBackend* gr_backend = nullptr;
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static int overscan_offset_x = 0;
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static int overscan_offset_y = 0;
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static uint32_t gr_current = ~0;
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static constexpr uint32_t alpha_mask = 0xff000000;
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// gr_draw is owned by backends.
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static GRSurface* gr_draw = nullptr;
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static GRRotation rotation = GRRotation::NONE;
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static PixelFormat pixel_format = PixelFormat::UNKNOWN;
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static bool outside(int x, int y) {
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auto swapped = (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT);
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return x < 0 || x >= (swapped ? gr_draw->height : gr_draw->width) || y < 0 ||
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y >= (swapped ? gr_draw->width : gr_draw->height);
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}
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const GRFont* gr_sys_font() {
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return gr_font;
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}
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PixelFormat gr_pixel_format() {
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return pixel_format;
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}
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int gr_measure(const GRFont* font, const char* s) {
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if (font == nullptr) {
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return -1;
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}
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return font->char_width * strlen(s);
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}
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int gr_font_size(const GRFont* font, int* x, int* y) {
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if (font == nullptr) {
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return -1;
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}
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*x = font->char_width;
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*y = font->char_height;
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return 0;
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}
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// Blends gr_current onto pix value, assumes alpha as most significant byte.
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static inline uint32_t pixel_blend(uint8_t alpha, uint32_t pix) {
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if (alpha == 255) return gr_current;
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if (alpha == 0) return pix;
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uint32_t pix_r = pix & 0xff;
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uint32_t pix_g = pix & 0xff00;
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uint32_t pix_b = pix & 0xff0000;
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uint32_t cur_r = gr_current & 0xff;
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uint32_t cur_g = gr_current & 0xff00;
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uint32_t cur_b = gr_current & 0xff0000;
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uint32_t out_r = (pix_r * (255 - alpha) + cur_r * alpha) / 255;
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uint32_t out_g = (pix_g * (255 - alpha) + cur_g * alpha) / 255;
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uint32_t out_b = (pix_b * (255 - alpha) + cur_b * alpha) / 255;
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return (out_r & 0xff) | (out_g & 0xff00) | (out_b & 0xff0000) | (gr_current & 0xff000000);
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}
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// Increments pixel pointer right, with current rotation.
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static void incr_x(uint32_t** p, int row_pixels) {
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if (rotation == GRRotation::LEFT) {
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*p = *p - row_pixels;
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} else if (rotation == GRRotation::RIGHT) {
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*p = *p + row_pixels;
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} else if (rotation == GRRotation::DOWN) {
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*p = *p - 1;
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} else { // GRRotation::NONE
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*p = *p + 1;
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}
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}
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// Increments pixel pointer down, with current rotation.
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static void incr_y(uint32_t** p, int row_pixels) {
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if (rotation == GRRotation::LEFT) {
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*p = *p + 1;
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} else if (rotation == GRRotation::RIGHT) {
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*p = *p - 1;
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} else if (rotation == GRRotation::DOWN) {
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*p = *p - row_pixels;
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} else { // GRRotation::NONE
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*p = *p + row_pixels;
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}
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}
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// Returns pixel pointer at given coordinates with rotation adjustment.
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static uint32_t* PixelAt(GRSurface* surface, int x, int y, int row_pixels) {
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switch (rotation) {
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case GRRotation::NONE:
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return reinterpret_cast<uint32_t*>(surface->data()) + y * row_pixels + x;
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case GRRotation::RIGHT:
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return reinterpret_cast<uint32_t*>(surface->data()) + x * row_pixels + (surface->width - y);
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case GRRotation::DOWN:
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return reinterpret_cast<uint32_t*>(surface->data()) + (surface->height - 1 - y) * row_pixels +
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(surface->width - 1 - x);
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case GRRotation::LEFT:
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return reinterpret_cast<uint32_t*>(surface->data()) + (surface->height - 1 - x) * row_pixels +
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y;
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default:
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printf("invalid rotation %d", static_cast<int>(rotation));
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}
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return nullptr;
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}
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static void TextBlend(const uint8_t* src_p, int src_row_bytes, uint32_t* dst_p, int dst_row_pixels,
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int width, int height) {
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uint8_t alpha_current = static_cast<uint8_t>((alpha_mask & gr_current) >> 24);
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for (int j = 0; j < height; ++j) {
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const uint8_t* sx = src_p;
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uint32_t* px = dst_p;
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for (int i = 0; i < width; ++i, incr_x(&px, dst_row_pixels)) {
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uint8_t a = *sx++;
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if (alpha_current < 255) a = (static_cast<uint32_t>(a) * alpha_current) / 255;
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*px = pixel_blend(a, *px);
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}
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src_p += src_row_bytes;
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incr_y(&dst_p, dst_row_pixels);
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}
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}
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void gr_text(const GRFont* font, int x, int y, const char* s, bool bold) {
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if (!font || !font->texture || (gr_current & alpha_mask) == 0) return;
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if (font->texture->pixel_bytes != 1) {
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printf("gr_text: font has wrong format\n");
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return;
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}
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bold = bold && (font->texture->height != font->char_height);
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x += overscan_offset_x;
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y += overscan_offset_y;
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unsigned char ch;
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while ((ch = *s++)) {
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if (outside(x, y) || outside(x + font->char_width - 1, y + font->char_height - 1)) break;
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if (ch < ' ' || ch > '~') {
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ch = '?';
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}
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int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
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const uint8_t* src_p = font->texture->data() + ((ch - ' ') * font->char_width) +
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(bold ? font->char_height * font->texture->row_bytes : 0);
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uint32_t* dst_p = PixelAt(gr_draw, x, y, row_pixels);
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TextBlend(src_p, font->texture->row_bytes, dst_p, row_pixels, font->char_width,
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font->char_height);
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x += font->char_width;
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}
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}
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void gr_texticon(int x, int y, const GRSurface* icon) {
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if (icon == nullptr) return;
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if (icon->pixel_bytes != 1) {
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printf("gr_texticon: source has wrong format\n");
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return;
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}
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x += overscan_offset_x;
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y += overscan_offset_y;
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if (outside(x, y) || outside(x + icon->width - 1, y + icon->height - 1)) return;
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int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
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const uint8_t* src_p = icon->data();
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uint32_t* dst_p = PixelAt(gr_draw, x, y, row_pixels);
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TextBlend(src_p, icon->row_bytes, dst_p, row_pixels, icon->width, icon->height);
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}
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void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a) {
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uint32_t r32 = r, g32 = g, b32 = b, a32 = a;
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if (pixel_format == PixelFormat::ARGB || pixel_format == PixelFormat::BGRA) {
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gr_current = (a32 << 24) | (r32 << 16) | (g32 << 8) | b32;
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} else {
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gr_current = (a32 << 24) | (b32 << 16) | (g32 << 8) | r32;
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}
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}
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void gr_clear() {
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if ((gr_current & 0xff) == ((gr_current >> 8) & 0xff) &&
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(gr_current & 0xff) == ((gr_current >> 16) & 0xff) &&
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(gr_current & 0xff) == ((gr_current >> 24) & 0xff) &&
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gr_draw->row_bytes == gr_draw->width * gr_draw->pixel_bytes) {
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memset(gr_draw->data(), gr_current & 0xff, gr_draw->height * gr_draw->row_bytes);
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} else {
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uint32_t* px = reinterpret_cast<uint32_t*>(gr_draw->data());
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int row_diff = gr_draw->row_bytes / gr_draw->pixel_bytes - gr_draw->width;
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for (int y = 0; y < gr_draw->height; ++y) {
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for (int x = 0; x < gr_draw->width; ++x) {
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*px++ = gr_current;
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}
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px += row_diff;
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}
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}
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}
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void gr_fill(int x1, int y1, int x2, int y2) {
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x1 += overscan_offset_x;
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y1 += overscan_offset_y;
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x2 += overscan_offset_x;
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y2 += overscan_offset_y;
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if (outside(x1, y1) || outside(x2 - 1, y2 - 1)) return;
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int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
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uint32_t* p = PixelAt(gr_draw, x1, y1, row_pixels);
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uint8_t alpha = static_cast<uint8_t>(((gr_current & alpha_mask) >> 24));
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if (alpha > 0) {
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for (int y = y1; y < y2; ++y) {
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uint32_t* px = p;
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for (int x = x1; x < x2; ++x) {
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*px = pixel_blend(alpha, *px);
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incr_x(&px, row_pixels);
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}
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incr_y(&p, row_pixels);
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}
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}
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}
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void gr_blit(const GRSurface* source, int sx, int sy, int w, int h, int dx, int dy) {
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if (source == nullptr) return;
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if (gr_draw->pixel_bytes != source->pixel_bytes) {
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printf("gr_blit: source has wrong format\n");
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return;
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}
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dx += overscan_offset_x;
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dy += overscan_offset_y;
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if (outside(dx, dy) || outside(dx + w - 1, dy + h - 1)) return;
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if (rotation != GRRotation::NONE) {
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int src_row_pixels = source->row_bytes / source->pixel_bytes;
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int row_pixels = gr_draw->row_bytes / gr_draw->pixel_bytes;
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const uint32_t* src_py =
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reinterpret_cast<const uint32_t*>(source->data()) + sy * source->row_bytes / 4 + sx;
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uint32_t* dst_py = PixelAt(gr_draw, dx, dy, row_pixels);
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for (int y = 0; y < h; y += 1) {
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const uint32_t* src_px = src_py;
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uint32_t* dst_px = dst_py;
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for (int x = 0; x < w; x += 1) {
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*dst_px = *src_px++;
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incr_x(&dst_px, row_pixels);
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}
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src_py += src_row_pixels;
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incr_y(&dst_py, row_pixels);
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}
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} else {
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const uint8_t* src_p = source->data() + sy * source->row_bytes + sx * source->pixel_bytes;
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uint8_t* dst_p = gr_draw->data() + dy * gr_draw->row_bytes + dx * gr_draw->pixel_bytes;
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for (int i = 0; i < h; ++i) {
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memcpy(dst_p, src_p, w * source->pixel_bytes);
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src_p += source->row_bytes;
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dst_p += gr_draw->row_bytes;
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}
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}
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}
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unsigned int gr_get_width(const GRSurface* surface) {
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if (surface == nullptr) {
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return 0;
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}
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return surface->width;
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}
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unsigned int gr_get_height(const GRSurface* surface) {
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if (surface == nullptr) {
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return 0;
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}
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return surface->height;
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}
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int gr_init_font(const char* name, GRFont** dest) {
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GRFont* font = static_cast<GRFont*>(calloc(1, sizeof(*gr_font)));
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if (font == nullptr) {
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return -1;
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}
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int res = res_create_alpha_surface(name, &(font->texture));
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if (res < 0) {
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free(font);
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return res;
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}
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// The font image should be a 96x2 array of character images. The
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// columns are the printable ASCII characters 0x20 - 0x7f. The
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// top row is regular text; the bottom row is bold.
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font->char_width = font->texture->width / 96;
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font->char_height = font->texture->height / 2;
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*dest = font;
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return 0;
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}
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void gr_flip() {
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gr_draw = gr_backend->Flip();
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}
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int gr_init() {
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// pixel_format needs to be set before loading any resources or initializing backends.
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std::string format = android::base::GetProperty("ro.minui.pixel_format", "");
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if (format == "ABGR_8888") {
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pixel_format = PixelFormat::ABGR;
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} else if (format == "RGBX_8888") {
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pixel_format = PixelFormat::RGBX;
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} else if (format == "ARGB_8888") {
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pixel_format = PixelFormat::ARGB;
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} else if (format == "BGRA_8888") {
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pixel_format = PixelFormat::BGRA;
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} else {
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pixel_format = PixelFormat::UNKNOWN;
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}
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int ret = gr_init_font("font", &gr_font);
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if (ret != 0) {
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printf("Failed to init font: %d, continuing graphic backend initialization without font file\n",
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ret);
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}
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auto backend = std::unique_ptr<MinuiBackend>{ std::make_unique<MinuiBackendDrm>() };
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gr_draw = backend->Init();
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if (!gr_draw) {
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backend = std::make_unique<MinuiBackendFbdev>();
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gr_draw = backend->Init();
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}
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if (!gr_draw) {
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return -1;
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}
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gr_backend = backend.release();
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int overscan_percent = android::base::GetIntProperty("ro.minui.overscan_percent", 0);
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overscan_offset_x = gr_draw->width * overscan_percent / 100;
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overscan_offset_y = gr_draw->height * overscan_percent / 100;
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gr_flip();
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gr_flip();
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if (!gr_draw) {
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printf("gr_init: gr_draw becomes nullptr after gr_flip\n");
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return -1;
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}
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std::string rotation_str =
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android::base::GetProperty("ro.minui.default_rotation", "ROTATION_NONE");
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if (rotation_str == "ROTATION_RIGHT") {
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gr_rotate(GRRotation::RIGHT);
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} else if (rotation_str == "ROTATION_DOWN") {
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gr_rotate(GRRotation::DOWN);
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} else if (rotation_str == "ROTATION_LEFT") {
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gr_rotate(GRRotation::LEFT);
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} else { // "ROTATION_NONE" or unknown string
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gr_rotate(GRRotation::NONE);
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}
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if (gr_draw->pixel_bytes != 4) {
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printf("gr_init: Only 4-byte pixel formats supported\n");
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}
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return 0;
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}
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void gr_exit() {
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delete gr_backend;
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gr_backend = nullptr;
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delete gr_font;
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gr_font = nullptr;
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}
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int gr_fb_width() {
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return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
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? gr_draw->height - 2 * overscan_offset_y
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: gr_draw->width - 2 * overscan_offset_x;
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}
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int gr_fb_height() {
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return (rotation == GRRotation::LEFT || rotation == GRRotation::RIGHT)
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? gr_draw->width - 2 * overscan_offset_x
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: gr_draw->height - 2 * overscan_offset_y;
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}
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void gr_fb_blank(bool blank) {
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gr_backend->Blank(blank);
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}
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void gr_rotate(GRRotation rot) {
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rotation = rot;
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}
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