Skip to content

Big-endian fix for RGB swapped colours #455

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Link4Electronics wants to merge 10 commits into
base: main
Choose a base branch
from
Open

Big-endian fix for RGB swapped colours #455

Changes from all commits
Commits
Show all changes
10 commits
Select commit Hold shift + click to select a range
0753120
Big endian fixes
Link4Electronics Oct 23, 2025
9653269
Fix sega logo, works on little and big-endian
Link4Electronics Oct 24, 2025
32be0fa
Revert sega logo
Link4Electronics Oct 24, 2025
2556b57
Swap endianness for pixel and vertex data
Link4Electronics Nov 1, 2025
af8a640
Merge branch 'RSDKModding:main' into main
Link4Electronics Nov 2, 2025
33839b0
Not really necessary
Link4Electronics Nov 4, 2025
95ac481
Merge branch 'RSDKModding:main' into main
Link4Electronics Dec 27, 2025
dd728f5
Update Renderer.cpp
Link4Electronics Jan 21, 2026
9f831d2
Update Renderer.cpp
Link4Electronics Jan 21, 2026
f10d3a4
Update Renderer.cpp
Link4Electronics Jan 21, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
39 changes: 22 additions & 17 deletions RSDKv4/Renderer.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include <SDL2/SDL.h> // Used to correct vertex explosions in the main menu on big-endian devices.

float retroVertexList[40];
float screenBufferVertexList[40];
Expand Down Expand Up @@ -683,7 +684,9 @@ int LoadTexture(const char *filePath, int format)
int g = data[id++];
int b = data[id++];
int a = data[id++];
pixels[x + (y * width)] = (a << 24) | (b << 16) | (g << 8) | (r << 0);
int pixel = (a << 24) | (b << 16) | (g << 8) | (r << 0);
pixel = SDL_SwapLE32(pixel);
pixels[x + (y * width)] = pixel;
}
}

Expand Down Expand Up @@ -793,7 +796,9 @@ void ReplaceTexture(const char *filePath, int texID)
int g = data[id++];
int b = data[id++];
int a = data[id++];
pixels[x + (y * width)] = (a << 24) | (b << 16) | (g << 8) | (r << 0);
int pixel = (a << 24) | (b << 16) | (g << 8) | (r << 0);
pixel = SDL_SwapLE32(pixel);
pixels[x + (y * width)] = pixel;
}
}

Expand Down Expand Up @@ -853,10 +858,10 @@ MeshInfo *LoadMesh(const char *filePath, byte textureID)
for (int v = 0; v < mesh->vertexCount; ++v) {
float buf = 0;
FileRead(&buf, sizeof(float));
mesh->vertices[v].texCoordX = buf;
mesh->vertices[v].texCoordX = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].texCoordY = buf;
mesh->vertices[v].texCoordY = SDL_SwapFloatLE(buf);

mesh->vertices[v].r = 0xFF;
mesh->vertices[v].g = 0xFF;
Expand Down Expand Up @@ -889,22 +894,22 @@ MeshInfo *LoadMesh(const char *filePath, byte textureID)
for (int v = 0; v < mesh->vertexCount; ++v) {
float buf = 0;
FileRead(&buf, sizeof(float));
mesh->vertices[v].vertX = buf;
mesh->vertices[v].vertX = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].vertY = buf;
mesh->vertices[v].vertY = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].vertZ = buf;
mesh->vertices[v].vertZ = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].normalX = buf;
mesh->vertices[v].normalX = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].normalY = buf;
mesh->vertices[v].normalY = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->vertices[v].normalZ = buf;
mesh->vertices[v].normalZ = SDL_SwapFloatLE(buf);
}
}
else {
Expand All @@ -914,22 +919,22 @@ MeshInfo *LoadMesh(const char *filePath, byte textureID)
for (int v = 0; v < mesh->vertexCount; ++v) {
float buf = 0;
FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].vertX = buf;
mesh->frames[frameOff + v].vertX = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].vertY = buf;
mesh->frames[frameOff + v].vertY = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].vertZ = buf;
mesh->frames[frameOff + v].vertZ = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].normalX = buf;
mesh->frames[frameOff + v].normalX = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].normalY = buf;
mesh->frames[frameOff + v].normalY = SDL_SwapFloatLE(buf);

FileRead(&buf, sizeof(float));
mesh->frames[frameOff + v].normalZ = buf;
mesh->frames[frameOff + v].normalZ = SDL_SwapFloatLE(buf);
}
}
}
Expand Down Expand Up @@ -1840,4 +1845,4 @@ void RenderMesh(MeshInfo *mesh, byte type, byte depthTest)

renderStateCount++;
}
}
}