Function WriteFrameToTextureMemory

source/video.cpp:1115–1157

* WriteFrameToTextureMemory ****************************************************************************/

 * WriteFrameToTextureMemory
 ****************************************************************************/
static void WriteFrameToTextureMemory(u8* srcBuffer, void* textureBase, int width, int height)
{
    int borderWidth = InitialBorder ? InitialBorderWidth : width;
    int borderHeight = InitialBorder ? InitialBorderHeight : height;

    ProcessSGBBorder(srcBuffer, width, height);
    long long int* dst_ptr = DrawBorderAndGetDest(textureBase, width, height, borderWidth, borderHeight);

    int gbPitch = width * 2 + 4;
    int dst_gap_bytes = ((borderWidth - width) / 4) * 32;

    // Route to the statically optimized ASM based on console resolution width
    switch (width) {
        case 160: // GB / GBC (Pitch = 324)
            MakeTextureVBA_Impl<324>(srcBuffer, dst_ptr, width, height, dst_gap_bytes);
            break;
        case 240: // GBA (Pitch = 484)
            MakeTextureVBA_Impl<484>(srcBuffer, dst_ptr, width, height, dst_gap_bytes);
            break;
        case 256: // SGB (Pitch = 516)
            MakeTextureVBA_Impl<516>(srcBuffer, dst_ptr, width, height, dst_gap_bytes);
            break;
        default:  // Fallback for custom borders/resolutions
            MakeTextureVBA_Dynamic(srcBuffer, dst_ptr, width, height, gbPitch, dst_gap_bytes);
            break;
    }

    // High-efficiency targeted data cache flushing
    if (InitialBorder && !borderJustChanged) {
        // Normal Frame: Flush ONLY the game screen cache lines (Saves ~87% bus bandwidth)
        u8* flush_ptr = (u8*)dst_ptr;
        u32 row_bytes = width * 8;         // bytes per tile row for game screen
        u32 stride_bytes = borderWidth * 8; // full texture pitch stride bytes
        int tile_rows = height / 4;
        for (int i = 0; i < tile_rows; i++) {
            DCStoreRange(flush_ptr, row_bytes);
            flush_ptr += stride_bytes;
        }
    } else {
        // Flush everything if borderless, OR if the border was just copied this frame
        DCStoreRange(textureBase, borderWidth * borderHeight * 2);
    }
}

/****************************************************************************
 * GX_Render