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author | Tony Wasserka <NeoBrainX@gmail.com> | 2014-12-28 23:28:58 +0100 |
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committer | Tony Wasserka <NeoBrainX@gmail.com> | 2014-12-31 16:32:55 +0100 |
commit | 18a5e888bbeda989aba6576e7dd7e2b6c09b45ea (patch) | |
tree | 7f3fad5c0c5a78a171a5818fcc5df067423f63ff /src/core/hw | |
parent | Pica/Rasterizer: Implement backface culling. (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/core/hw/gpu.cpp | 6 | ||||
-rw-r--r-- | src/core/hw/gpu.h | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp index dd619cb16..0ff6c6cde 100644 --- a/src/core/hw/gpu.cpp +++ b/src/core/hw/gpu.cpp @@ -94,11 +94,15 @@ inline void Write(u32 addr, const T data) { int r, g, b, a; } source_color = { 0, 0, 0, 0 }; + // Cheap emulation of horizontal scaling: Just skip each second pixel of the + // input framebuffer. We keep track of this in the pixel_skip variable. + unsigned pixel_skip = (config.scale_horizontally != 0) ? 2 : 1; + switch (config.input_format) { case Regs::PixelFormat::RGBA8: { // TODO: Most likely got the component order messed up. - u8* srcptr = source_pointer + x * 4 + y * config.input_width * 4; + u8* srcptr = source_pointer + x * 4 * pixel_skip + y * config.input_width * 4 * pixel_skip; source_color.r = srcptr[0]; // blue source_color.g = srcptr[1]; // green source_color.b = srcptr[2]; // red diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h index 292f496c1..7de055232 100644 --- a/src/core/hw/gpu.h +++ b/src/core/hw/gpu.h @@ -157,6 +157,9 @@ struct Regs { BitField< 8, 3, PixelFormat> input_format; BitField<12, 3, PixelFormat> output_format; BitField<16, 1, u32> output_tiled; // stores output in a tiled format + + // TODO: Not really sure if this actually scales, or even resizes at all. + BitField<24, 1, u32> scale_horizontally; }; INSERT_PADDING_WORDS(0x1); |