WiiUPluginLoaderBackend/source/utils/DrawUtils.cpp

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#include "DrawUtils.h"
#include <coreinit/memory.h>
#include <coreinit/screen.h>
#include <ft2build.h>
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#include <png.h>
#include FT_FREETYPE_H
// buffer width
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#define TV_WIDTH 0x500
#define DRC_WIDTH 0x380
bool DrawUtils::isBackBuffer;
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uint8_t *DrawUtils::tvBuffer = nullptr;
uint32_t DrawUtils::tvSize = 0;
uint8_t *DrawUtils::drcBuffer = nullptr;
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uint32_t DrawUtils::drcSize = 0;
// Don't put those into the clase or we have to include ft everywhere
static FT_Library ft_lib = nullptr;
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static FT_Face ft_face = nullptr;
static Color font_col(0xFFFFFFFF);
void DrawUtils::initBuffers(void *tvBuffer_, uint32_t tvSize_, void *drcBuffer_, uint32_t drcSize_) {
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DrawUtils::tvBuffer = (uint8_t *) tvBuffer_;
DrawUtils::tvSize = tvSize_;
DrawUtils::drcBuffer = (uint8_t *) drcBuffer_;
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DrawUtils::drcSize = drcSize_;
}
void DrawUtils::beginDraw() {
uint32_t pixel = *(uint32_t *) tvBuffer;
// check which buffer is currently used
OSScreenPutPixelEx(SCREEN_TV, 0, 0, 0xABCDEF90);
if (*(uint32_t *) tvBuffer == 0xABCDEF90) {
isBackBuffer = false;
} else {
isBackBuffer = true;
}
// restore the pixel we used for checking
*(uint32_t *) tvBuffer = pixel;
}
void DrawUtils::endDraw() {
// OSScreenFlipBuffersEx already flushes the cache?
// DCFlushRange(tvBuffer, tvSize);
// DCFlushRange(drcBuffer, drcSize);
OSScreenFlipBuffersEx(SCREEN_DRC);
OSScreenFlipBuffersEx(SCREEN_TV);
}
void DrawUtils::clear(Color col) {
OSScreenClearBufferEx(SCREEN_TV, col.color);
OSScreenClearBufferEx(SCREEN_DRC, col.color);
}
void DrawUtils::drawPixel(uint32_t x, uint32_t y, uint8_t r, uint8_t g, uint8_t b, uint8_t a) {
float opacity = a / 255.0f;
// put pixel in the drc buffer
uint32_t i = (x + y * DRC_WIDTH) * 4;
if (i + 3 < drcSize / 2) {
if (isBackBuffer) {
i += drcSize / 2;
}
if (a == 0xFF) {
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drcBuffer[i] = r;
drcBuffer[i + 1] = g;
drcBuffer[i + 2] = b;
} else {
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drcBuffer[i] = r * opacity + drcBuffer[i] * (1 - opacity);
drcBuffer[i + 1] = g * opacity + drcBuffer[i + 1] * (1 - opacity);
drcBuffer[i + 2] = b * opacity + drcBuffer[i + 2] * (1 - opacity);
}
}
uint32_t USED_TV_WIDTH = TV_WIDTH;
float scale = 1.5f;
if (DrawUtils::tvSize == 0x00FD2000) {
USED_TV_WIDTH = 1920;
scale = 2.25f;
}
// scale and put pixel in the tv buffer
for (uint32_t yy = (y * scale); yy < ((y * scale) + (uint32_t) scale); yy++) {
for (uint32_t xx = (x * scale); xx < ((x * scale) + (uint32_t) scale); xx++) {
uint32_t i = (xx + yy * USED_TV_WIDTH) * 4;
if (i + 3 < tvSize / 2) {
if (isBackBuffer) {
i += tvSize / 2;
}
if (a == 0xFF) {
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tvBuffer[i] = r;
tvBuffer[i + 1] = g;
tvBuffer[i + 2] = b;
} else {
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tvBuffer[i] = r * opacity + tvBuffer[i] * (1 - opacity);
tvBuffer[i + 1] = g * opacity + tvBuffer[i + 1] * (1 - opacity);
tvBuffer[i + 2] = b * opacity + tvBuffer[i + 2] * (1 - opacity);
}
}
}
}
}
void DrawUtils::drawRectFilled(uint32_t x, uint32_t y, uint32_t w, uint32_t h, Color col) {
for (uint32_t yy = y; yy < y + h; yy++) {
for (uint32_t xx = x; xx < x + w; xx++) {
drawPixel(xx, yy, col);
}
}
}
void DrawUtils::drawRect(uint32_t x, uint32_t y, uint32_t w, uint32_t h, uint32_t borderSize, Color col) {
drawRectFilled(x, y, w, borderSize, col);
drawRectFilled(x, y + h - borderSize, w, borderSize, col);
drawRectFilled(x, y, borderSize, h, col);
drawRectFilled(x + w - borderSize, y, borderSize, h, col);
}
void DrawUtils::drawBitmap(uint32_t x, uint32_t y, uint32_t target_width, uint32_t target_height, const uint8_t *data) {
if (data[0] != 'B' || data[1] != 'M') {
// invalid header
return;
}
uint32_t dataPos = __builtin_bswap32(*(uint32_t *) &(data[0x0A]));
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uint32_t width = __builtin_bswap32(*(uint32_t *) &(data[0x12]));
uint32_t height = __builtin_bswap32(*(uint32_t *) &(data[0x16]));
if (dataPos == 0) {
dataPos = 54;
}
data += dataPos;
// TODO flip image since bitmaps are stored upside down
for (uint32_t yy = y; yy < y + target_height; yy++) {
for (uint32_t xx = x; xx < x + target_width; xx++) {
uint32_t i = (((xx - x) * width / target_width) + ((yy - y) * height / target_height) * width) * 3;
drawPixel(xx, yy, data[i + 2], data[i + 1], data[i], 0xFF);
}
}
}
static void png_read_data(png_structp png_ptr, png_bytep outBytes, png_size_t byteCountToRead) {
void **data = (void **) png_get_io_ptr(png_ptr);
memcpy(outBytes, *data, byteCountToRead);
*((uint8_t **) data) += byteCountToRead;
}
void DrawUtils::drawPNG(uint32_t x, uint32_t y, const uint8_t *data) {
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
if (png_ptr == nullptr) {
return;
}
png_infop info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == nullptr) {
png_destroy_read_struct(&png_ptr, nullptr, nullptr);
return;
}
png_set_read_fn(png_ptr, (void *) &data, png_read_data);
png_read_info(png_ptr, info_ptr);
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uint32_t width = 0;
uint32_t height = 0;
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int bitDepth = 0;
int colorType = -1;
uint32_t retval = png_get_IHDR(png_ptr, info_ptr, &width, &height, &bitDepth, &colorType, nullptr, nullptr, nullptr);
if (retval != 1) {
return;
}
uint32_t bytesPerRow = png_get_rowbytes(png_ptr, info_ptr);
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auto *rowData = new uint8_t[bytesPerRow];
for (uint32_t yy = y; yy < y + height; yy++) {
png_read_row(png_ptr, (png_bytep) rowData, nullptr);
for (uint32_t xx = x; xx < x + width; xx++) {
if (colorType == PNG_COLOR_TYPE_RGB_ALPHA) {
uint32_t i = (xx - x) * 4;
drawPixel(xx, yy, rowData[i], rowData[i + 1], rowData[i + 2], rowData[i + 3]);
} else if (colorType == PNG_COLOR_TYPE_RGB) {
uint32_t i = (xx - x) * 3;
drawPixel(xx, yy, rowData[i], rowData[i + 1], rowData[i + 2], 0xFF);
}
}
}
delete[] rowData;
png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
}
void DrawUtils::initFont() {
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void *font = nullptr;
uint32_t size = 0;
OSGetSharedData(OS_SHAREDDATATYPE_FONT_STANDARD, 0, &font, &size);
if (font && size) {
FT_Init_FreeType(&ft_lib);
FT_New_Memory_Face(ft_lib, (FT_Byte *) font, size, 0, &ft_face);
}
}
void DrawUtils::deinitFont() {
FT_Done_Face(ft_face);
FT_Done_FreeType(ft_lib);
}
void DrawUtils::setFontSize(uint32_t size) {
FT_Set_Pixel_Sizes(ft_face, 0, size);
}
void DrawUtils::setFontColor(Color col) {
font_col = col;
}
static void draw_freetype_bitmap(FT_Bitmap *bitmap, FT_Int x, FT_Int y) {
FT_Int i, j, p, q;
FT_Int x_max = x + bitmap->width;
FT_Int y_max = y + bitmap->rows;
for (i = x, p = 0; i < x_max; i++, p++) {
for (j = y, q = 0; j < y_max; j++, q++) {
if (i < 0 || j < 0 || i >= SCREEN_WIDTH || j >= SCREEN_HEIGHT) {
continue;
}
float opacity = bitmap->buffer[q * bitmap->pitch + p] / 255.0f;
DrawUtils::drawPixel(i, j, font_col.r, font_col.g, font_col.b, font_col.a * opacity);
}
}
}
void DrawUtils::print(uint32_t x, uint32_t y, const char *string, bool alignRight) {
auto *buffer = new wchar_t[strlen(string) + 1];
size_t num = mbstowcs(buffer, string, strlen(string));
if (num > 0) {
buffer[num] = 0;
} else {
wchar_t *tmp = buffer;
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while ((*tmp++ = *string++))
;
}
print(x, y, buffer, alignRight);
delete[] buffer;
}
void DrawUtils::print(uint32_t x, uint32_t y, const wchar_t *string, bool alignRight) {
FT_GlyphSlot slot = ft_face->glyph;
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FT_Vector pen = {(int) x, (int) y};
if (alignRight) {
pen.x -= getTextWidth(string);
}
for (; *string; string++) {
uint32_t charcode = *string;
if (charcode == '\n') {
pen.y += ft_face->size->metrics.height >> 6;
pen.x = x;
continue;
}
FT_Load_Glyph(ft_face, FT_Get_Char_Index(ft_face, charcode), FT_LOAD_DEFAULT);
FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL);
draw_freetype_bitmap(&slot->bitmap, pen.x + slot->bitmap_left, pen.y - slot->bitmap_top);
pen.x += slot->advance.x >> 6;
}
}
uint32_t DrawUtils::getTextWidth(const char *string) {
auto *buffer = new wchar_t[strlen(string) + 1];
size_t num = mbstowcs(buffer, string, strlen(string));
if (num > 0) {
buffer[num] = 0;
} else {
wchar_t *tmp = buffer;
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while ((*tmp++ = *string++))
;
}
uint32_t width = getTextWidth(buffer);
delete[] buffer;
return width;
}
uint32_t DrawUtils::getTextWidth(const wchar_t *string) {
FT_GlyphSlot slot = ft_face->glyph;
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uint32_t width = 0;
for (; *string; string++) {
FT_Load_Glyph(ft_face, FT_Get_Char_Index(ft_face, *string), FT_LOAD_BITMAP_METRICS_ONLY);
width += slot->advance.x >> 6;
}
return width;
}