cafe/gx2ut/gx2utResolve.h

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  These coded instructions, statements, and computer programs contain
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#ifndef _GX2UTRESOLVE_H_
#define _GX2UTRESOLVE_H_

// Note: Currently this header depends on gx2.h being included first to define
// types like s32 and structures like GX2Surface.
#include <cafe/gx2.h>

#ifdef __cplusplus
extern "C" {
#endif

/// @addtogroup GX2UTCopyAndConvertGroup
/// @{

/// \brief Setup all of the constant render state needed for \ref GX2UTResolveAAColorBuffer.
///
/// \param enable Enable or disable the state
///
/// This enables and disables the state used by \ref GX2UTResolveAAColorBuffer.
/// After finishing all resolve operations, it is necessary to call
/// this function to disable the resolve state and set any changed state
/// back to the GX2 default state. A smaller yet equivalent routine can be
/// written using knowledge of the application's desired state.
/// To customize the state that is restored, refer to the library source
/// (src/lib/gx2ut/gx2utResolve.cpp).
///
/// \donotcall \gx2_typical \enddonotcall
///
/// \clobberstate
///
/// \writesgpu
/// \alwayswritesgpu
///
void GX2UTSetResolveAAColorState(GX2Boolean enable);

/// \brief Resolves a MSAA color buffer to a single-sampled surface.
///
/// \param cb  Pointer to color buffer surface structure
/// \param dstSurface Destination color/texture surface.
/// \param dstMip Destination mipmap level for dstSurface.
/// \param dstSlice Destination slice for dstSurface.
/// \param subRect Pointer to the region to resolve.
///
/// This function assumes \ref GX2UTSetResolveAAColorState
/// (or comparable state setup function) has been called to setup required
/// render state.
///
/// This resolves a MSAA color buffer to a single-sampled surface in the same
/// way as \ref GX2ResolveAAColorBuffer. It modifies the currently bound VS/PS
/// shaders, GX2_RENDER_TARGET0, GX2_RENDER_TARGET1, and Scissor/Viewport
/// settings. In addition it overwrites VS uniform locations 0-3, and it
/// changes the \ref GX2SetShaderMode to
/// \ref GX2_SHADER_MODE_UNIFORM_REGISTER.
///
/// Resolves a region from one surface to a region of another surface. Setting
/// the rectangular regions to a top-left of (0,0) and a bottom-right of (width,
/// height) will resolve the entire surface without any flipping (the right and
/// bottom are exclusive).
///
/// The subRect dimensions should be relative to the mipmap level dimensions,
/// not the base level dimensions.  The subRect origin (left, top) must be
/// aligned on a 2x2 pixel boundary.
///
/// \note It is not necessary to call \ref GX2Invalidate on the
///       source/destination buffer. This is done internally.
///
/// \note This routine has the same limitations as \ref GX2ResolveAAColorBuffer.
///       \ref GX2IsResolveSupported can be used to determine if a source
///       GX2ColorBuffer can be resolved.
///
/// \note This resolve, as it is, will be impacted by the toss stage
///       (\ref GX2TossStageSect) setup at GX2Init time. To avoid this, call
///       this function from a separate state context with profiling disabled.
///       See \ref GX2SetupContextStateEx for more information.
///
/// \warning The color buffer must not be an AA buffer and the destination
///          surface must be a non-AA color/texture surface.
///
/// \clobberstate
///
/// \donotcall \gx2_typical \enddonotcall
///
/// \writesgpu
/// \alwayswritesgpu
///
void GX2UTResolveAAColorBufferRectOp(const GX2ColorBuffer *cb,
                                     GX2Surface *dstSurface,
                                     u32 dstMip, u32 dstSlice,
                                     GX2UTRect * subRect);

/// \brief Resolves a MSAA color buffer to a single-sampled surface.
///
/// \param cb  Pointer to color buffer surface structure
/// \param dstSurface Destination color/texture surface.
/// \param dstMip Destination mipmap level for dstSurface.
/// \param dstSlice Destination slice for dstSurface.
///
/// This function assumes \ref GX2UTSetResolveAAColorState
/// (or comparable state setup function) has been called to setup required
/// render state.
///
/// This resolves a MSAA color buffer to a single-sampled surface in the same
/// way as \ref GX2ResolveAAColorBuffer. It modifies the currently bound VS/PS
/// shaders, GX2_RENDER_TARGET0, GX2_RENDER_TARGET1, and Scissor/Viewport
/// settings. In addition it overwrites VS uniform locations 0-3, and it
/// changes the \ref GX2SetShaderMode to
/// \ref GX2_SHADER_MODE_UNIFORM_REGISTER.
///
/// \note It is not necessary to call \ref GX2Invalidate on the
///       source/destination buffer. This is done internally.
///
/// \note This routine has the same limitations as \ref GX2ResolveAAColorBuffer.
///       \ref GX2IsResolveSupported can be used to determine if a source
///       GX2ColorBuffer can be resolved.
///
/// \note This resolve, as it is, will be impacted by the toss stage
///       (\ref GX2TossStageSect) setup at GX2Init time. To avoid this, call
///       this function from a separate state context with profiling disabled.
///       See \ref GX2SetupContextStateEx for more information.
///
/// \warning The color buffer must not be an AA buffer and the destination
///          surface must be a non-AA color/texture surface.
///
/// \clobberstate
///
/// \donotcall \gx2_typical \enddonotcall
///
/// \writesgpu
/// \alwayswritesgpu
///
GX2_INLINE void GX2UTResolveAAColorBufferOp(const GX2ColorBuffer *cb,
                                            GX2Surface *dstSurface, u32 dstMip,
                                            u32 dstSlice)
{
    GX2UTRect subRect = {0};

    subRect.right = GX2Max(1, dstSurface->width >> dstMip);
    subRect.bottom = GX2Max(1, dstSurface->height >> dstMip);

    GX2UTDebugTagIndent(__func__);

    GX2UTResolveAAColorBufferRectOp(cb, dstSurface, dstMip, dstSlice, &subRect);

    GX2UTDebugTagUndent();
}


/// \brief Resolves a MSAA color buffer to a single-sampled surface.
///
/// \param cb  Pointer to color buffer surface structure
/// \param dstSurface Destination color/texture surface.
/// \param dstMip Destination mipmap level for dstSurface.
/// \param dstSlice Destination slice for dstSurface.
///
/// This function mimics the behavior of GX2 and is intended to be an optimized
/// replacement for \ref GX2ResolveAAColorBuffer.
///
/// \note This API changes rendering states and disables state shadowing.
///       If you are using state shadowing, you must call
///       \ref GX2SetContextState() afterward.
///
/// \note This routine has the same limitations as \ref GX2ResolveAAColorBuffer.
///       \ref GX2IsResolveSupported can be used to determine if a source
///       GX2ColorBuffer can be resolved.
///
/// \warning Better performing alternatives exist. Please see
///          \ref GX2UTAdvancedGX2ReplacementAPISect.
///
/// \clobberstate
/// \disablesstateshadow
///
/// \donotcall \gx2_typical \enddonotcall
///
/// \writesgpu
/// \alwayswritesgpu
///
GX2_INLINE void GX2UTResolveAAColorBuffer(const GX2ColorBuffer *cb,
                                          GX2Surface *dstSurface, u32 dstMip,
                                          u32 dstSlice)
{
    GX2UTDebugTagIndent(__func__);

    // Disable state shadowing.  If your app is using state shadowing,
    // you will need to restore the context after calling this function.
    GX2SetContextState(NULL);

    // Setup all of the constant render state needed for the color resolve.
    GX2UTSetResolveAAColorState(GX2_ENABLE);

    // Setup parameter specific render state and color resolve.
    GX2UTResolveAAColorBufferOp(cb, dstSurface, dstMip, dstSlice);

    // Disable special hardware state and set state back to GX2 default
    GX2UTSetResolveAAColorState(GX2_DISABLE);

    GX2UTDebugTagUndent();
}


/// @}

#ifdef __cplusplus
}
#endif // __cplusplus

#endif // _GX2UTRESOLVE_H_