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Crafter.Graphics/interfaces/Crafter.Graphics-RenderingElement.cppm

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/*
Crafter®.Graphics
Copyright (C) 2025 Catcrafts®
catcrafts.net
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License version 3.0 as published by the Free Software Foundation;
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
module;
#define STB_IMAGE_IMPLEMENTATION
#include "../lib/stb_image.h"
#include "../lib/stb_truetype.h"
export module Crafter.Graphics:RenderingElement;
import std;
import :Transform;
import :Font;
import :Types;
import :Image;
import :Window;
export namespace Crafter {
enum class TextAlignment {
Left,
Center,
Right
};
enum class TextOverflowMode {
Clip,
Wrap
};
enum class TextScaleMode {
None,
Font,
Element,
Buffer
};
struct RenderElementScalingOwning {
std::vector<Pixel_BU8_GU8_RU8_AU8> scalingBuffer;
std::uint32_t bufferWidth;
std::uint32_t bufferHeight;
bool bufferUpdated = true;
RenderElementScalingOwning() = default;
RenderElementScalingOwning(std::uint32_t bufferWidth, std::uint32_t bufferHeight) : scalingBuffer(bufferWidth*bufferHeight), bufferWidth(bufferWidth), bufferHeight(bufferHeight) {
}
};
struct RenderElementScalingNonOwning {
Pixel_BU8_GU8_RU8_AU8* scalingBuffer;
std::uint32_t bufferWidth;
std::uint32_t bufferHeight;
bool bufferUpdated = true;
RenderElementScalingNonOwning() = default;
RenderElementScalingNonOwning(Pixel_BU8_GU8_RU8_AU8* scalingBuffer, std::uint32_t bufferWidth, std::uint32_t bufferHeight) : scalingBuffer(scalingBuffer), bufferWidth(bufferWidth), bufferHeight(bufferHeight) {
}
};
struct RenderElementRotating {
std::uint32_t rotation;
bool rotationUpdated = true;
RenderElementRotating() = default;
RenderElementRotating(std::uint32_t rotation) : rotation(rotation) {
}
};
struct EmptyScalingBase {};
struct EmptyRotatingBase {};
template<bool Scaling, bool Owning>
using ScalingBase =
std::conditional_t<
Scaling,
std::conditional_t<Owning,
RenderElementScalingOwning,
RenderElementScalingNonOwning>,
EmptyScalingBase
>;
template<bool Rotating>
using RotatingBase =
std::conditional_t<
Rotating,
RenderElementRotating,
EmptyRotatingBase
>;
class RenderingElementBase : public Transform {
public:
std::vector<Pixel_BU8_GU8_RU8_AU8> buffer;
OpaqueType opaque;
RenderingElementBase(Anchor anchor) : Transform(anchor) {
scaled.width = 0;
}
RenderingElementBase(Anchor anchor, OpaqueType opaque) : Transform(anchor), opaque(opaque) {
scaled.width = 0;
}
};
template<bool Scaling, bool Owning, bool Rotating> requires ((!Rotating || Scaling) && (!Owning || Scaling))
class RenderingElement : public RenderingElementBase, public ScalingBase<Scaling, Owning>, public RotatingBase<Rotating> {
public:
RenderingElement() = default;
RenderingElement(Anchor anchor, OpaqueType opaque) : RenderingElementBase(anchor, opaque) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, std::uint32_t rotation) requires(Rotating) : RenderingElementBase(anchor, opaque), RotatingBase<Rotating>(rotation) {
}
RenderingElement(Anchor anchor, const std::string_view imagePath) : RenderingElementBase(anchor) {
LoadImage(imagePath);
}
RenderingElement(Anchor anchor, const std::string_view imagePath, std::uint32_t rotation) requires(Rotating) : RenderingElementBase(anchor), RotatingBase<Rotating>(rotation) {
LoadImage(imagePath);
}
RenderingElement(Anchor anchor, const std::string_view imagePath, OpaqueType opaque) : RenderingElementBase(anchor, opaque) {
LoadImageNoOpaqueCheck(imagePath);
}
RenderingElement(Anchor anchor, const std::string_view imagePath, OpaqueType opaque, std::uint32_t rotation) requires(Rotating) : RenderingElementBase(anchor, opaque), RotatingBase<Rotating>(rotation) {
LoadImageNoOpaqueCheck(imagePath);
}
RenderingElement(Anchor anchor, OpaqueType opaque, std::uint32_t bufferWidth, std::uint32_t bufferHeight, Pixel_BU8_GU8_RU8_AU8* scalingBuffer) requires(Scaling && !Owning) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(bufferWidth, bufferHeight, scalingBuffer) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, std::uint32_t bufferWidth, std::uint32_t bufferHeight, Pixel_BU8_GU8_RU8_AU8* scalingBuffer, std::uint32_t rotation) requires(Scaling && !Owning && Rotating) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(bufferWidth, bufferHeight, scalingBuffer), RotatingBase<Rotating>(rotation) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, Image& image) requires(Scaling && !Owning) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(image.buffer.data(), image.width, image.height) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, Image& image, std::uint32_t rotation) requires(Scaling && !Owning && Rotating) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(image.buffer.data(), image.width, image.height), RotatingBase<Rotating>(rotation) {
}
RenderingElement(Anchor anchor, Image& image) requires(Scaling && !Owning) : RenderingElementBase(anchor, image.opaque), ScalingBase<Scaling, Owning>(image.buffer.data(), image.width, image.height) {
}
RenderingElement(Anchor anchor, Image& image, std::uint32_t rotation) requires(Scaling && !Owning && Rotating) : RenderingElementBase(anchor, image.opaque), ScalingBase<Scaling, Owning>(image.buffer.data(), image.width, image.height), RotatingBase<Rotating>(rotation) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, std::uint32_t bufferWidth, std::uint32_t bufferHeight) requires(Owning) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(bufferWidth, bufferHeight) {
}
RenderingElement(Anchor anchor, OpaqueType opaque, std::uint32_t bufferWidth, std::uint32_t bufferHeight, std::uint32_t rotation) requires(Owning && Rotating) : RenderingElementBase(anchor, opaque), ScalingBase<Scaling, Owning>(bufferWidth, bufferHeight) , RotatingBase<Rotating>(rotation) {
}
RenderingElement(RenderingElement&) = delete;
RenderingElement& operator=(RenderingElement&) = delete;
void ScaleNearestNeighbor() requires(Scaling) {
for (std::uint32_t y = 0; y < scaled.height; y++) {
std::uint32_t srcY = y * ScalingBase<true, Owning>::bufferHeight / scaled.height;
for (std::uint32_t x = 0; x < scaled.width; x++) {
std::uint32_t srcX = x * ScalingBase<true, Owning>::bufferWidth / scaled.width;
buffer[y * scaled.width + x] = ScalingBase<true, Owning>::scalingBuffer[srcY * ScalingBase<true, Owning>::bufferWidth + srcX];
}
}
}
void ScaleRotating() requires(Scaling) {
const double rad = (static_cast<double>(RotatingBase<true>::rotation) / static_cast<double>(std::numeric_limits<std::uint32_t>::max())) * 2.0 * std::numbers::pi;
const std::uint32_t dstWidth = scaled.width;
const std::uint32_t dstHeight = scaled.height;
const double c2 = std::abs(std::cos(rad));
const double s2 = std::abs(std::sin(rad));
const double rotatedWidth = dstWidth * c2 + dstHeight * s2;
const double rotatedHeight = dstWidth * s2 + dstHeight * c2;
const std::uint32_t diffX = static_cast<std::uint32_t>(std::ceil((rotatedWidth - dstWidth) * 0.5));
const std::uint32_t diffY = static_cast<std::uint32_t>(std::ceil((rotatedHeight - dstHeight) * 0.5));
scaled.width += diffX + diffX;
scaled.height += diffY + diffY;
scaled.x -= diffX;
scaled.y -= diffY;
buffer.clear();
buffer.resize(scaled.width * scaled.height);
// Destination center
const double dstCx = (static_cast<double>(scaled.width) - 1.0) * 0.5;
const double dstCy = (static_cast<double>(scaled.height) - 1.0) * 0.5;
// Source center
const double srcCx = (static_cast<double>(ScalingBase<true, Owning>::bufferWidth) - 1.0) * 0.5;
const double srcCy = (static_cast<double>(ScalingBase<true, Owning>::bufferHeight) - 1.0) * 0.5;
const double c = std::cos(rad);
const double s = std::sin(rad);
// Scale factors (destination → source)
const double scaleX = static_cast<double>(ScalingBase<true, Owning>::bufferWidth) / dstWidth;
const double scaleY = static_cast<double>(ScalingBase<true, Owning>::bufferHeight) / dstHeight;
for (std::uint32_t yB = 0; yB < scaled.height; ++yB) {
for (std::uint32_t xB = 0; xB < scaled.width; ++xB) {
// ---- Destination pixel relative to center ----
const double dx = (static_cast<double>(xB) - dstCx) * scaleX;
const double dy = (static_cast<double>(yB) - dstCy) * scaleY;
// ---- Inverse rotation ----
const double sx = (c * dx - s * dy) + srcCx;
const double sy = (s * dx + c * dy) + srcCy;
// ---- Nearest neighbour sampling ----
const std::int32_t srcX = static_cast<std::int32_t>(std::round(sx));
const std::int32_t srcY = static_cast<std::int32_t>(std::round(sy));
if (srcX >= 0 && srcX < ScalingBase<true, Owning>::bufferWidth && srcY >= 0 && srcY < ScalingBase<true, Owning>::bufferHeight) {
buffer[yB * scaled.width + xB] = ScalingBase<true, Owning>::scalingBuffer[srcY * ScalingBase<true, Owning>::bufferWidth + srcX];
}
}
}
}
void UpdatePosition(Window& window, ScaleData oldScale) {
if constexpr(Scaling && !Rotating) {
if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
buffer.resize(scaled.width * scaled.height);
ScaleNearestNeighbor();
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
} else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
if(ScalingBase<true, Owning>::bufferUpdated) {
ScaleNearestNeighbor();
ScalingBase<true, Owning>::bufferUpdated = false;
}
} else if(ScalingBase<true, Owning>::bufferUpdated) {
ScaleNearestNeighbor();
ScalingBase<true, Owning>::bufferUpdated = false;
}
} else if constexpr(Rotating) {
if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
buffer.resize(scaled.width * scaled.height);
ScaleRotating();
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
} else if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
if(ScalingBase<true, Owning>::bufferUpdated || RotatingBase<true>::rotationUpdated) {
ScaleRotating();
ScalingBase<true, Owning>::bufferUpdated = false;
RotatingBase<true>::rotationUpdated = false;
}
} else if(ScalingBase<true, Owning>::bufferUpdated || RotatingBase<true>::rotationUpdated) {
ScaleRotating();
ScalingBase<true, Owning>::bufferUpdated = false;
RotatingBase<true>::rotationUpdated = false;
}
} else {
if(oldScale.width != scaled.width || oldScale.height != scaled.height) {
buffer.resize(scaled.width * scaled.height);
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
}
if(oldScale.x != scaled.x || oldScale.y != scaled.y) {
window.AddDirtyRect(oldScale);
window.AddDirtyRect(scaled);
}
}
}
void UpdatePosition(Window& window) override {
ScaleData oldScale = scaled;
window.ScaleElement(*this);
UpdatePosition(window, oldScale);
for(Transform* child : children) {
child->UpdatePosition(window, *this);
}
}
void UpdatePosition(Window& window, Transform& parent) override {
ScaleData oldScale = scaled;
window.ScaleElement(*this, parent);
UpdatePosition(window, oldScale);
for(Transform* child : children) {
child->UpdatePosition(window, *this);
}
}
void LoadImage(const std::string_view imagePath) {
std::filesystem::path abs = std::filesystem::absolute(imagePath);
int xSize;
int ySize;
unsigned char* bgData = stbi_load(abs.string().c_str(), &xSize, &ySize, nullptr, 4);
if constexpr(Scaling && !Owning) {
ScalingBase<true, false>::bufferUpdated = true;
} else if constexpr(Scaling && Owning) {
ScalingBase<true, true>::bufferWidth = xSize;
ScalingBase<true, true>::bufferHeight = ySize;
ScalingBase<true, true>::bufferUpdated = true;
ScalingBase<true, Owning>::scalingBuffer.resize(xSize*ySize);
} else {
buffer.resize(xSize*ySize);
}
opaque = OpaqueType::FullyOpaque;
if constexpr(Scaling) {
for(std::uint32_t x = 0; x < xSize; x++) {
for(std::uint32_t y = 0; y < ySize; y++) {
std::uint32_t idx = (x*ySize+y)*4;
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].r = bgData[idx];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].g = bgData[idx+1];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].b = bgData[idx+2];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].a = bgData[idx+3];
}
}
for(std::uint32_t i = 0; i < xSize*ySize; i++) {
if(ScalingBase<true, Owning>::scalingBuffer[i].a != 255) {
opaque = OpaqueType::SemiOpaque;
for(std::uint32_t i2 = 0; i2 < xSize*ySize; i2++) {
if(ScalingBase<true, Owning>::scalingBuffer[i2].a != 0 && ScalingBase<true, Owning>::scalingBuffer[i2].a != 255) {
opaque = OpaqueType::Transparent;
return;
}
}
return;
}
}
} else {
for(std::uint32_t x = 0; x < xSize; x++) {
for(std::uint32_t y = 0; y < ySize; y++) {
std::uint32_t idx = (x*ySize+y)*4;
buffer[x*ySize+y].r = bgData[idx];
buffer[x*ySize+y].g = bgData[idx+1];
buffer[x*ySize+y].b = bgData[idx+2];
buffer[x*ySize+y].a = bgData[idx+3];
}
}
for(std::uint32_t i = 0; i < xSize*ySize; i++) {
if(buffer[i].a != 255) {
opaque = OpaqueType::SemiOpaque;
for(std::uint32_t i2 = 0; i2 < xSize*ySize; i2++) {
if(buffer[i2].a != 0 && buffer[i2].a != 255) {
opaque = OpaqueType::Transparent;
return;
}
}
return;
}
}
}
}
void LoadImageNoOpaqueCheck(const std::string_view imagePath) {
std::filesystem::path abs = std::filesystem::absolute(imagePath);
int xSize;
int ySize;
unsigned char* bgData = stbi_load(abs.string().c_str(), &xSize, &ySize, nullptr, 4);
if constexpr(Scaling && !Owning) {
ScalingBase<true, false>::bufferUpdated = true;
} else if constexpr(Scaling && Owning) {
ScalingBase<true, true>::bufferWidth = xSize;
ScalingBase<true, true>::bufferHeight = ySize;
ScalingBase<true, true>::bufferUpdated = true;
ScalingBase<true, Owning>::scalingBuffer.resize(xSize*ySize);
} else {
buffer.resize(xSize*ySize);
}
if constexpr(Scaling) {
for(std::uint32_t x = 0; x < xSize; x++) {
for(std::uint32_t y = 0; y < ySize; y++) {
std::uint32_t idx = (x*ySize+y)*4;
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].r = bgData[idx];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].g = bgData[idx+1];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].b = bgData[idx+2];
ScalingBase<true, Owning>::scalingBuffer[x*ySize+y].a = bgData[idx+3];
}
}
} else {
for(std::uint32_t x = 0; x < xSize; x++) {
for(std::uint32_t y = 0; y < ySize; y++) {
std::uint32_t idx = (x*ySize+y)*4;
buffer[x*ySize+y].r = bgData[idx];
buffer[x*ySize+y].g = bgData[idx+1];
buffer[x*ySize+y].b = bgData[idx+2];
buffer[x*ySize+y].a = bgData[idx+3];
}
}
}
}
std::vector<std::string_view> ResizeText(Window& window, const std::string_view text, float size, Font& font, TextOverflowMode overflowMode = TextOverflowMode::Clip, TextScaleMode scaleMode = TextScaleMode::None, Transform* parent = nullptr) {
float scale = stbtt_ScaleForPixelHeight(&font.font, size);
int baseline = (int)(font.ascent * scale);
std::vector<std::string_view> lines;
std::string_view remaining = text;
std::uint32_t lineHeight = (font.ascent - font.descent) * scale;
if(overflowMode == TextOverflowMode::Clip) {
while (!remaining.empty()) {
// Find next newline or end of string
auto newlinePos = remaining.find('\n');
if (newlinePos != std::string_view::npos) {
lines.emplace_back(remaining.substr(0, newlinePos));
remaining = remaining.substr(newlinePos + 1);
} else {
lines.emplace_back(remaining);
break;
}
}
std::uint32_t maxWidth = 0;
for(const std::string_view line: lines) {
std::uint32_t lineWidth = 0;
for (const char c : line) {
int advance, lsb;
stbtt_GetCodepointHMetrics(&font.font, c, &advance, &lsb);
lineWidth += (int)(advance * scale);
}
if(lineWidth > maxWidth) {
maxWidth = lineWidth;
}
}
if(scaleMode == TextScaleMode::Element) {
std::int32_t logicalPerPixelY = anchor.height / scaled.height;
std::int32_t oldHeight = anchor.height;
std::int32_t logicalPerPixelX = anchor.width / scaled.width;
std::int32_t oldwidth = anchor.width;
anchor.height = lineHeight * logicalPerPixelY;
anchor.width = maxWidth * logicalPerPixelX;
if(oldHeight != anchor.height || oldwidth != anchor.width) {
if(parent) {
UpdatePosition(window, *parent);
} else {
UpdatePosition(window);
}
}
} else if(scaleMode == TextScaleMode::Font) {
//todo
} else if(scaleMode == TextScaleMode::Buffer) {
if constexpr(Scaling && Owning) {
std::uint32_t neededHeight = lines.size() * lineHeight;
if(neededHeight != ScalingBase<true, true>::bufferHeight || maxWidth != ScalingBase<true, true>::bufferWidth) {
ScalingBase<true, true>::bufferHeight = neededHeight;
ScalingBase<true, true>::bufferWidth = maxWidth;
ScalingBase<true, true>::bufferUpdated = true;
ScalingBase<true, Owning>::scalingBuffer.resize(neededHeight*maxWidth);
}
}
} else {
if constexpr(Scaling) {
lines.resize(ScalingBase<true, Owning>::bufferHeight / lines.size());
} else {
lines.resize(scaled.height / lines.size());
}
}
} else {
while (!remaining.empty()) {
std::string_view line;
auto newlinePos = remaining.find('\n');
if (newlinePos != std::string_view::npos) {
line = remaining.substr(0, newlinePos);
remaining = remaining.substr(newlinePos + 1);
} else {
line = remaining;
remaining = "";
}
std::uint32_t lineWidth = 0;
std::size_t lastWrapPos = 0; // position of last space that can be used to wrap
std::size_t startPos = 0;
for (std::size_t i = 0; i < line.size(); ++i) {
char c = line[i];
// get width of this character
int advance, lsb;
stbtt_GetCodepointHMetrics(&font.font, c, &advance, &lsb);
lineWidth += (std::uint32_t)(advance * scale);
// remember last space for wrapping
if (c == ' ') {
lastWrapPos = i;
}
// if line exceeds width, wrap
if (lineWidth > scaled.width) {
std::size_t wrapPos;
if (lastWrapPos > startPos) {
wrapPos = lastWrapPos; // wrap at last space
} else {
wrapPos = i; // no space, hard wrap
}
// push the line up to wrapPos
lines.push_back(line.substr(startPos, wrapPos - startPos));
// skip any spaces at the beginning of next line
startPos = wrapPos;
while (startPos < line.size() && line[startPos] == ' ') {
++startPos;
}
// reset width and i
lineWidth = 0;
i = startPos - 1; // -1 because loop will increment i
}
}
// add the remaining part of the line
if (startPos < line.size()) {
lines.push_back(line.substr(startPos));
}
}
if(scaleMode == TextScaleMode::Element) {
std::int32_t logicalPerPixelY = anchor.height / scaled.height;
std::int32_t oldHeight = anchor.height;
anchor.height = lineHeight * logicalPerPixelY;
if(oldHeight != anchor.height) {
if(parent) {
UpdatePosition(window, *parent);
} else {
UpdatePosition(window);
}
}
} else if(scaleMode == TextScaleMode::Font) {
//todo
} else if(scaleMode == TextScaleMode::Buffer) {
if constexpr(Scaling && Owning) {
std::uint32_t neededHeight = lines.size() * lineHeight;
if(neededHeight != ScalingBase<true, true>::bufferHeight) {
ScalingBase<true, true>::bufferHeight = neededHeight;
ScalingBase<true, true>::bufferUpdated = true;
ScalingBase<true, Owning>::scalingBuffer.resize(neededHeight*ScalingBase<true, true>::bufferWidth);
}
}
} else {
if constexpr(Scaling) {
lines.resize(ScalingBase<true, Owning>::bufferHeight / lines.size());
} else {
lines.resize(scaled.height / lines.size());
}
}
}
return lines;
}
void RenderText(Window& window, std::span<const std::string_view> lines, float size, Pixel_BU8_GU8_RU8_AU8 color, Font& font, TextAlignment alignment = TextAlignment::Left, std::uint32_t offsetX = 0, std::uint32_t offsetY = 0) {
float scale = stbtt_ScaleForPixelHeight(&font.font, size);
int baseline = (int)(font.ascent * scale);
std::uint32_t lineHeight = (font.ascent - font.descent) * scale;
std::uint32_t currentY = baseline;
for(std::string_view line : lines) {
std::uint32_t lineWidth = 0;
for (const char c : line) {
int advance, lsb;
stbtt_GetCodepointHMetrics(&font.font, c, &advance, &lsb);
lineWidth += (int)(advance * scale);
}
std::uint32_t startX = 0;
switch (alignment) {
case TextAlignment::Left:
startX = 0;
break;
case TextAlignment::Center:
startX = (scaled.width - lineWidth) / 2;
break;
case TextAlignment::Right:
startX = scaled.width - lineWidth;
break;
}
std::uint32_t x = startX;
for (std::size_t i = 0; i < line.size(); ++i) {
int codepoint = line[i];
int ax;
int lsb;
stbtt_GetCodepointHMetrics(&font.font, codepoint, &ax, &lsb);
int c_x1, c_y1, c_x2, c_y2;
stbtt_GetCodepointBitmapBox(&font.font, codepoint, scale, scale, &c_x1, &c_y1, &c_x2, &c_y2);
int w = c_x2 - c_x1;
int h = c_y2 - c_y1;
std::vector<unsigned char> bitmap(w * h);
stbtt_MakeCodepointBitmap(&font.font, bitmap.data(), w, h, w, scale, scale, codepoint);
// Only render characters that fit within the scaled bounds
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int bufferX = x + i + c_x1 + offsetX;
int bufferY = currentY + j + c_y1 + offsetY;
// Only draw pixels that are within our scaled buffer bounds
if constexpr(Scaling) {
if (bufferX >= 0 && bufferX < ScalingBase<true, Owning>::bufferWidth && bufferY >= 0 && bufferY < ScalingBase<true, Owning>::bufferHeight) {
ScalingBase<true, Owning>::scalingBuffer[bufferY * ScalingBase<true, Owning>::bufferWidth + bufferX] = {color.r, color.g, color.b, bitmap[j * w + i]};
}
} else {
if (bufferX >= 0 && bufferX < (int)scaled.width && bufferY >= 0 && bufferY < (int)scaled.height) {
buffer[bufferY * scaled.width + bufferX] = {color.r, color.g, color.b, bitmap[j * w + i]};
}
}
}
}
x += (int)(ax * scale);
if (i + 1 < line.size()) {
x += (int)stbtt_GetCodepointKernAdvance(&font.font, codepoint, line[i+1]);
}
}
currentY += lineHeight;
}
}
};
}
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