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OneLoneCoder merged 2 commits into from
Oct 9, 2026
Merged

Sw render util #331

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5e3bff4
SW Rendering Example & utility
OneLoneCoder Oct 9, 2026
17f6274
denoised
OneLoneCoder Oct 9, 2026
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1 change: 1 addition & 0 deletions dev/msvc/olcPGE3.vcxproj
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Expand Up @@ -182,6 +182,7 @@
<ClInclude Include="..\..\utilities\olcUTIL3_GameMode.h" />
<ClInclude Include="..\..\utilities\olcUTIL3_Geometry2D.h" />
<ClInclude Include="..\..\utilities\olcUTIL3_QuadTree.h" />
<ClInclude Include="..\..\utilities\olcUTIL3_SWRender.h" />
<ClInclude Include="..\src\api_macos.h">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
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3 changes: 3 additions & 0 deletions dev/msvc/olcPGE3.vcxproj.filters
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Expand Up @@ -201,6 +201,9 @@
<ClInclude Include="..\..\extensions\miniaudio\olcPGEX3_Miniaudio.h">
<Filter>Extensions\MiniAudio</Filter>
</ClInclude>
<ClInclude Include="..\..\utilities\olcUTIL3_SWRender.h">
<Filter>Utilities</Filter>
</ClInclude>
</ItemGroup>
<ItemGroup>
<ClCompile Include="..\src\core.cpp">
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12 changes: 10 additions & 2 deletions dev/msvc/olcPGE3_BuildSH/olcPGE3_BuildSH.vcxproj
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Expand Up @@ -107,6 +107,10 @@
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="..\..\..\examples\olcPGE3_SoftwareRendering.cpp">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="..\..\..\examples\olcPGE3_TextFontMap.cpp">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
Expand Down Expand Up @@ -164,8 +168,8 @@
<ClCompile Include="..\..\..\examples\olcPGE3_Camera2D_Tiles.cpp">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">false</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">false</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ExcludedFromBuild>
</ClCompile>
<ClCompile Include="..\..\..\examples\olcPGE3_Touch.cpp">
<ExcludedFromBuild Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ExcludedFromBuild>
Expand Down Expand Up @@ -242,15 +246,19 @@
<PropertyGroup Label="UserMacros" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<OutDir>$(SolutionDir)..\..\</OutDir>
<IncludePath>$(VC_IncludePath);$(WindowsSDK_IncludePath);../../../;</IncludePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
<OutDir>$(SolutionDir)..\..\</OutDir>
<IncludePath>$(VC_IncludePath);$(WindowsSDK_IncludePath);../../../;</IncludePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
<OutDir>$(SolutionDir)..\..\</OutDir>
<IncludePath>$(VC_IncludePath);$(WindowsSDK_IncludePath);../../../;</IncludePath>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
<OutDir>$(SolutionDir)..\..\</OutDir>
<IncludePath>$(VC_IncludePath);$(WindowsSDK_IncludePath);../../../;</IncludePath>
</PropertyGroup>
<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
<ClCompile>
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3 changes: 3 additions & 0 deletions dev/msvc/olcPGE3_BuildSH/olcPGE3_BuildSH.vcxproj.filters
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Expand Up @@ -99,6 +99,9 @@
<ClCompile Include="..\..\..\examples\olcPGE3_Touch.cpp">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\..\..\examples\olcPGE3_SoftwareRendering.cpp">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<Image Include="..\..\..\examples\assets\minsanity_texture.png">
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31 changes: 31 additions & 0 deletions dev/src/image.cpp
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Expand Up @@ -72,6 +72,37 @@ namespace olc
return onCPU;
}

bool Image::set(int x, int y, olc::Pixel p)
{
if (x >= 0 && y >= 0 && x < dimensions.x && y < dimensions.y)
{
pixels[int(y) * dimensions.x + int(x)] = p;
return true;
}
else
return false;
}

olc::Pixel Image::get(int x, int y)
{
if (x >= 0 && y >= 0 && x < dimensions.x && y < dimensions.y)
{
return pixels[int(y) * dimensions.x + int(x)];
}
else
return olc::Colour::BLACK;
}

int Image::width()
{
return dimensions.x;
}

int Image::height()
{
return dimensions.y;
}

olc::ImageRegion Image::all()
{
return olc::ImageRegion(*this);
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7 changes: 7 additions & 0 deletions dev/src/image.h
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Expand Up @@ -82,6 +82,13 @@ namespace olc
bool BoundToGPU() const;
bool BoundToCPU() const;


// SW Renderer IFace
bool set(int x, int y, olc::Pixel p);
olc::Pixel get(int x, int y);
int width();
int height();

public:
olc::ImageRegion all();
olc::ImageRegion region(const olc::vf2d pos, const olc::vf2d& size);
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200 changes: 200 additions & 0 deletions examples/olcPGE3_SoftwareRendering.cpp
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@@ -0,0 +1,200 @@
/*
olc::PixelGameEngine3 Example - Software Rendering

Draws transformed and textured graphics entirely with the CPU

Licenced under the OLC-3 License
*/


// Define OLC_PGE3_APPLICATION to include the implementation of
// the Pixel Game Engine as part of this translation unit
#define OLC_PGE3_APPLICATION
#include "../olcPixelGameEngine3.h"
#include "../utilities/olcUTIL3_SWRender.h"

struct TextSurface
{
TextSurface()
{
sSurface.resize(vSize.area(), '-');
}

std::string sSurface;
olc::vi2d vSize = { 32, 30 };

bool set(int x, int y, char c)
{
if (x >= 0 && y >= 0 && x < vSize.x && y < vSize.y)
{
sSurface[y * vSize.x + x] = c;
return true;
}
else
return false;
}

char get(int x, int y)
{
if (x >= 0 && y >= 0 && x < vSize.x && y < vSize.y)
{
return sSurface[y * vSize.x + x];
}
else
return 'x';
}

int width() { return vSize.x; }
int height() { return vSize.y; }
};



class Example_SoftwareRenderer : public olc::PixelGameEngine
{
public:
Example_SoftwareRenderer()
{
sAppName = "Example - Lines";
}

public:
// Called once at the start, so create things here
bool OnUserCreate() override
{
// Nothing to do here, so return true
CreateImageFromFile(imgTest, "./assets/sanity_texture.png");
return true;
}

// Called every frame, so update things here
bool OnUserUpdate(float fElapsedTime) override
{

draw.Clear(olc::Colour::CYAN);
draw.Pixel({ 0,0 },olc::Colour::GREEN);

DrawSW.SetTarget(draw.GetTarget());

DrawSW.Clear(olc::Colour::VERY_DARK_BLUE);

DrawSW.Plot({ 4, 4 }, olc::Colour::RED);

DrawSW.Line({ 10,4 }, mouse.GetPosition(), olc::Colour::MAGENTA, olc::Colour::VERY_DARK_BLUE);

DrawSW.FilledRect({ 10,22 }, { 32, 32 }, olc::Colour::BLACK);

DrawSW.FilledRect({ 6, 18 }, { 32, 32 },
olc::Colour::RED, olc::Colour::YELLOW,
olc::Colour::GREEN, olc::Colour::MAGENTA);

DrawSW.Rect({ 6, 18 }, { 32, 32 }, olc::Colour::WHITE);



float fTotal = float(TotalTimeElapsed());

DrawSW.WorldOffset({ 68, 68 });
DrawSW.WorldRotate(fTotal, { 0 ,0 });
DrawSW.FilledRect({ -16, -16 }, { 32, 32 }, olc::Colour::BLACK);

DrawSW.WorldReset();
DrawSW.WorldOffset({ 64, 64 });
DrawSW.WorldRotate(fTotal, { 0 ,0 });
DrawSW.FilledRect({ -16, -16 }, { 32, 32 },
olc::Colour::RED, olc::Colour::YELLOW,
olc::Colour::GREEN, olc::Colour::MAGENTA);

DrawSW.Rect({ -16, -16 }, { 32, 32 }, olc::Colour::WHITE);


DrawSW.WorldReset();
DrawSW.WorldOffset({ 128, 68 });
DrawSW.WorldRotate(fTotal, { 0 ,0 });
DrawSW.WorldScale({ 2, 2 });
DrawSW.FilledRect({ -16, -16 }, { 32, 32 }, olc::Colour::BLACK);

DrawSW.WorldReset();
DrawSW.WorldOffset({ 124, 64 });
DrawSW.WorldRotate(fTotal, { 0 ,0 });
DrawSW.WorldScale({ 2, 2 });
DrawSW.TexturedRect({ -16, -16 }, { 32, 32 },
imgTest);





DrawSW.WorldReset();
DrawSW.TexturedTriangle(
{ 20,180 },
mouse.GetPosition(),
{ 250, 230 },
olc::Colour::RED,
olc::Colour::GREEN,
olc::Colour::BLUE,
{ 0,0 },
{ 1,0 },
{ 1,1 }, imgTest);



DrawSW.Circle(mouse.GetPosition(), 20, olc::Colour::GREEN);
DrawSW.FilledCircle(mouse.GetPosition(), 10, olc::Colour::CYAN);


//// Clear
//TextDraw.SetTarget(textSurface);
//
//
//TextDraw.Clear('-');


//TextDraw.FilledTriangle(
// { 20 / 8, 180 / 8 },
// mouse.GetPosition() / 8,
// { 250 / 8, 230 / 8 },
// 'O');


//TextDraw.Line({ 10 / 8,10 / 8 }, mouse.GetPosition() / 8, 'A');


//// Draw TextSurface to Screen
//for (int y = 0; y < textSurface.height(); y++)
//{
// for (int x = 0; x < textSurface.width(); x++)
// {
// draw.String({ x * 8.0f, y * 8.0f }, std::string(1, textSurface.get(x, y)));
// }
//}

// Successful frame
return true;
}

protected:
olc::utils::SWDraw DrawSW;
olc::Image imgTest;

TextSurface textSurface;
olc::utils::SoftwareRenderer<TextSurface, char> TextDraw;
};


// Main entry point for the application
int main()
{
// Construct demo application
Example_SoftwareRenderer demo;

// Create "screen" of 256x240 "pixels"
// with a pixel size of 4x4 actual screen pixels
if (demo.Construct({ 256, 240 }, { 4, 4 }))
{
// Start the application
demo.Start();
}

return 0;
}
38 changes: 38 additions & 0 deletions olcPixelGameEngine3.h
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Expand Up @@ -2379,6 +2379,13 @@ namespace olc
bool BoundToGPU() const;
bool BoundToCPU() const;


// SW Renderer IFace
bool set(int x, int y, olc::Pixel p);
olc::Pixel get(int x, int y);
int width();
int height();

public:
olc::ImageRegion all();
olc::ImageRegion region(const olc::vf2d pos, const olc::vf2d& size);
Expand Down Expand Up @@ -20668,6 +20675,37 @@ namespace olc
return onCPU;
}

bool Image::set(int x, int y, olc::Pixel p)
{
if (x >= 0 && y >= 0 && x < dimensions.x && y < dimensions.y)
{
pixels[int(y) * dimensions.x + int(x)] = p;
return true;
}
else
return false;
}

olc::Pixel Image::get(int x, int y)
{
if (x >= 0 && y >= 0 && x < dimensions.x && y < dimensions.y)
{
return pixels[int(y) * dimensions.x + int(x)];
}
else
return olc::Colour::BLACK;
}

int Image::width()
{
return dimensions.x;
}

int Image::height()
{
return dimensions.y;
}

olc::ImageRegion Image::all()
{
return olc::ImageRegion(*this);
Expand Down
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