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vmware-svga/lib/refdriver/svga3d.c

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Initial revision
2009-04-13 02:05:42 -05:00
/**********************************************************
* Copyright 2008-2009 VMware, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
**********************************************************/
/*
* svga3d.c --
*
* FIFO command level interface to the SVGA3D protocol used by
* the VMware SVGA device.
*/
#include "svga.h"
#include "svga3d.h"
/*
*----------------------------------------------------------------------
*
* SVGA3D_Init --
*
* Perform 3D-only initialization for the SVGA device. This
* function negotiates SVGA3D protocol versions between the host
* and the guest.
*
* The 3D protocol negotiation works as follows:
*
* 1. Before enabling the FIFO, the guest writes its 3D protocol
* version to the SVGA_FIFO_GUEST_3D_HWVERSION register.
* We do this step in SVGA_Init().
*
* 2. When the FIFO is enabled, the host checks our 3D version
* for compatibility. If the host can support our protocol,
* the host puts its protocol version in SVGA_FIFO_3D_HWVERSION.
* If the host cannot support our protocol, it leaves the
* version set to zero.
*
* This function must be called after the FIFO is enabled.
* (After SVGA_SetMode.)
*
* Results:
* None.
*
* Side effects:
* Panic if the host is incompatible with 3D.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_Init(void)
{
if (!(gSVGA.capabilities & SVGA_CAP_EXTENDED_FIFO)) {
SVGA_Panic("3D requires the Extended FIFO capability.");
}
if (gSVGA.fifoMem[SVGA_FIFO_MIN] <= sizeof(uint32) * SVGA_FIFO_GUEST_3D_HWVERSION) {
SVGA_Panic("GUEST_3D_HWVERSION register not present.");
}
/*
* Check the host's version, make sure we're binary compatible.
*/
if (gSVGA.fifoMem[SVGA_FIFO_3D_HWVERSION] == 0) {
SVGA_Panic("3D disabled by host.");
}
if (gSVGA.fifoMem[SVGA_FIFO_3D_HWVERSION] < SVGA3D_HWVERSION_WS65_B1) {
SVGA_Panic("Host SVGA3D protocol is too old, not binary compatible.");
}
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_FIFOReserve --
*
* Reserve space for an SVGA3D FIFO command.
*
* The 2D SVGA commands have been around for a while, so they
* have a rather asymmetric structure. The SVGA3D protocol is
* more uniform: each command begins with a header containing the
* command number and the full size.
*
* This is a convenience wrapper around SVGA_FIFOReserve. We
* reserve space for the whole command, and write the header.
*
* This function must be paired with SVGA_FIFOCommitAll().
*
* Results:
* Returns a pointer to the space reserved for command-specific
* data. It must be 'cmdSize' bytes long.
*
* Side effects:
* Begins a FIFO reservation.
*
*----------------------------------------------------------------------
*/
void *
SVGA3D_FIFOReserve(uint32 cmd, // IN
uint32 cmdSize) // IN
{
SVGA3dCmdHeader *header;
header = SVGA_FIFOReserve(sizeof *header + cmdSize);
header->id = cmd;
header->size = cmdSize;
return &header[1];
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginDefineSurface --
*
* Begin a SURFACE_DEFINE command. This reserves space for it in
* the FIFO, and returns pointers to the command's faces and
* mipsizes arrays.
*
* This function must be paired with SVGA_FIFOCommitAll().
* The faces and mipSizes arrays are initialized to zero.
*
* This creates a "surface" object in the SVGA3D device,
* with the provided surface ID (sid). Surfaces are generic
* containers for host VRAM objects like textures, vertex
* buffers, and depth/stencil buffers.
*
* Surfaces are hierarchial:
*
* - Surface may have multiple faces (for cube maps)
*
* - Each face has a list of mipmap levels
*
* - Each mipmap image may have multiple volume
* slices, if the image is three dimensional.
*
* - Each slice is a 2D array of 'blocks'
*
* - Each block may be one or more pixels.
* (Usually 1, more for DXT or YUV formats.)
*
* Surfaces are generic host VRAM objects. The SVGA3D device
* may optimize surfaces according to the format they were
* created with, but this format does not limit the ways in
* which the surface may be used. For example, a depth surface
* can be used as a texture, or a floating point image may
* be used as a vertex buffer. Some surface usages may be
* lower performance, due to software emulation, but any
* usage should work with any surface.
*
* If 'sid' is already defined, the old surface is deleted
* and this new surface replaces it.
*
* Surface IDs are arbitrary small non-negative integers,
* global to the entire SVGA device.
*
* Results:
* Returns pointers to arrays allocated in the FIFO for 'faces'
* and 'mipSizes'.
*
* Side effects:
* Begins a FIFO reservation.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginDefineSurface(uint32 sid, // IN
SVGA3dSurfaceFlags flags, // IN
SVGA3dSurfaceFormat format, // IN
SVGA3dSurfaceFace **faces, // OUT
SVGA3dSize **mipSizes, // OUT
uint32 numMipSizes) // IN
{
SVGA3dCmdDefineSurface *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SURFACE_DEFINE, sizeof *cmd +
sizeof **mipSizes * numMipSizes);
cmd->sid = sid;
cmd->surfaceFlags = flags;
cmd->format = format;
*faces = &cmd->face[0];
*mipSizes = (SVGA3dSize*) &cmd[1];
memset(*faces, 0, sizeof **faces * SVGA3D_MAX_SURFACE_FACES);
memset(*mipSizes, 0, sizeof **mipSizes * numMipSizes);
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_DestroySurface --
*
* Release the host VRAM encapsulated by a particular surface ID.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_DestroySurface(uint32 sid) // IN
{
SVGA3dCmdDestroySurface *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SURFACE_DESTROY, sizeof *cmd);
cmd->sid = sid;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginSurfaceDMA--
*
* Begin a SURFACE_DMA command. This reserves space for it in
* the FIFO, and returns a pointer to the command's box array.
* This function must be paired with SVGA_FIFOCommitAll().
*
* When the SVGA3D device asynchronously processes this FIFO
* command, a DMA operation is performed between host VRAM and
* a generic SVGAGuestPtr. The guest pointer may refer to guest
* VRAM (provided by the SVGA PCI device) or to guest system
* memory that has been set up as a Guest Memory Region (GMR)
* by the SVGA device.
*
* The guest's DMA buffer must remain valid (not freed, paged out,
* or overwritten) until the host has finished processing this
* command. The guest can determine that the host has finished
* by using the SVGA device's FIFO Fence mechanism.
*
* The guest's image buffer can be an arbitrary size and shape.
* Guest image data is interpreted according to the SVGA3D surface
* format specified when the surface was defined.
*
* The caller may optionally define the guest image's pitch.
* guestImage->pitch can either be zero (assume image is tightly
* packed) or it must be the number of bytes between vertically
* adjacent image blocks.
*
* The provided copybox list specifies which regions of the source
* image are to be copied, and where they appear on the destination.
*
* NOTE: srcx/srcy are always on the guest image and x/y are
* always on the host image, regardless of the actual transfer
* direction!
*
* For efficiency, the SVGA3D device is free to copy more data
* than specified. For example, it may round copy boxes outwards
* such that they lie on particular alignment boundaries.
*
* The box array is initialized with zeroes.
*
* Results:
* Returns pointers to a box array allocated in the FIFO.
*
* Side effects:
* Begins a FIFO reservation.
* Begins a FIFO command which will eventually perform DMA.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginSurfaceDMA(SVGA3dGuestImage *guestImage, // IN
SVGA3dSurfaceImageId *hostImage, // IN
SVGA3dTransferType transfer, // IN
SVGA3dCopyBox **boxes, // OUT
uint32 numBoxes) // IN
{
SVGA3dCmdSurfaceDMA *cmd;
uint32 boxesSize = sizeof **boxes * numBoxes;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SURFACE_DMA, sizeof *cmd + boxesSize);
cmd->guest = *guestImage;
cmd->host = *hostImage;
cmd->transfer = transfer;
*boxes = (SVGA3dCopyBox*) &cmd[1];
memset(*boxes, 0, boxesSize);
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_DefineContext --
*
* Create a new context, to be referred to with the provided ID.
*
* Context objects encapsulate all render state, and shader
* objects are per-context.
*
* Surfaces are not per-context. The same surface can be shared
* between multiple contexts, and surface operations can occur
* without a context.
*
* If the provided context ID already existed, it is redefined.
*
* Context IDs are arbitrary small non-negative integers,
* global to the entire SVGA device.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_DefineContext(uint32 cid) // IN
{
SVGA3dCmdDefineContext *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_CONTEXT_DEFINE, sizeof *cmd);
cmd->cid = cid;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_DestroyContext --
*
* Delete a context created with SVGA3D_DefineContext.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_DestroyContext(uint32 cid) // IN
{
SVGA3dCmdDestroyContext *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_CONTEXT_DESTROY, sizeof *cmd);
cmd->cid = cid;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetRenderTarget --
*
* Bind a surface object to a particular render target attachment
* point on the current context. Render target attachment points
* exist for color buffers, a depth buffer, and a stencil buffer.
*
* The SVGA3D device is quite lenient about the types of surfaces
* that may be used as render targets. The color buffers must
* all be the same size, but the depth and stencil buffers do not
* have to be the same size as the color buffer. All attachments
* are optional.
*
* Some combinations of render target formats may require software
* emulation, depending on the capabilities of the host graphics
* API and graphics hardware.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetRenderTarget(uint32 cid, // IN
SVGA3dRenderTargetType type, // IN
SVGA3dSurfaceImageId *target) // IN
{
SVGA3dCmdSetRenderTarget *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETRENDERTARGET, sizeof *cmd);
cmd->cid = cid;
cmd->type = type;
cmd->target = *target;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetTransform --
*
* Set one of the current context's transform matrices.
* The 'type' parameter should be an SVGA3D_TRANSFORM_* constant.
*
* All transformation matrices follow Direct3D-style coordinate
* system semantics.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetTransform(uint32 cid, // IN
SVGA3dTransformType type, // IN
const float *matrix) // IN
{
SVGA3dCmdSetTransform *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETTRANSFORM, sizeof *cmd);
cmd->cid = cid;
cmd->type = type;
memcpy(&cmd->matrix[0], matrix, sizeof(float) * 16);
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetMaterial --
*
* Set all material data for one SVGA3dFace.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetMaterial(uint32 cid, // IN
SVGA3dFace face, // IN
const SVGA3dMaterial *material) // IN
{
SVGA3dCmdSetMaterial *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETMATERIAL, sizeof *cmd);
cmd->cid = cid;
cmd->face = face;
memcpy(&cmd->material, material, sizeof *material);
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetLightEnabled --
*
* Enable or disable one fixed-function light.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetLightEnabled(uint32 cid, // IN
uint32 index, // IN
Bool enabled) // IN
{
SVGA3dCmdSetLightEnabled *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETLIGHTENABLED, sizeof *cmd);
cmd->cid = cid;
cmd->index = index;
cmd->enabled = enabled;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetLightData --
*
* Set all state for one fixed-function light.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetLightData(uint32 cid, // IN
uint32 index, // IN
const SVGA3dLightData *data) // IN
{
SVGA3dCmdSetLightData *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETLIGHTDATA, sizeof *cmd);
cmd->cid = cid;
cmd->index = index;
memcpy(&cmd->data, data, sizeof *data);
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_DefineShader --
*
* Upload the bytecode for a new shader. The bytecode is "SVGA3D
* format", which is theoretically a binary-compatible superset
* of Microsoft's DirectX shader bytecode. In practice, the
* SVGA3D bytecode doesn't yet have any extensions to DirectX's
* bytecode format.
*
* The SVGA3D device supports shader models 1.1 through 2.0.
*
* The caller chooses a shader ID (small positive integer) by
* which this shader will be identified in future commands. This
* ID is in a namespace which is per-context and per-shader-type.
*
* 'bytecodeLen' is specified in bytes. It must be a multiple of 4.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_DefineShader(uint32 cid, // IN
uint32 shid, // IN
SVGA3dShaderType type, // IN
const uint32 *bytecode, // IN
uint32 bytecodeLen) // IN
{
SVGA3dCmdDefineShader *cmd;
if (bytecodeLen & 3) {
SVGA_Panic("Shader bytecode length isn't a multiple of 32 bits!");
}
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SHADER_DEFINE, sizeof *cmd + bytecodeLen);
cmd->cid = cid;
cmd->shid = shid;
cmd->type = type;
memcpy(&cmd[1], bytecode, bytecodeLen);
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_DestroyShader --
*
* Delete a shader that was created by SVGA3D_DefineShader. If
* the shader was the current vertex or pixel shader for its
* context, rendering results are undefined until a new shader is
* bound.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_DestroyShader(uint32 cid, // IN
uint32 shid, // IN
SVGA3dShaderType type) // IN
{
SVGA3dCmdDestroyShader *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SHADER_DESTROY, sizeof *cmd);
cmd->cid = cid;
cmd->shid = shid;
cmd->type = type;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetShaderConst --
*
* Set the value of a shader constant.
*
* Shader constants are analogous to uniform variables in GLSL,
* except that they belong to the render context rather than to
* an individual shader.
*
* Constants may have one of three types: A 4-vector of floats,
* a 4-vector of integers, or a single boolean flag.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetShaderConst(uint32 cid, // IN
uint32 reg, // IN
SVGA3dShaderType type, // IN
SVGA3dShaderConstType ctype, // IN
const void *value) // IN
{
SVGA3dCmdSetShaderConst *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SET_SHADER_CONST, sizeof *cmd);
cmd->cid = cid;
cmd->reg = reg;
cmd->type = type;
cmd->ctype = ctype;
switch (ctype) {
case SVGA3D_CONST_TYPE_FLOAT:
case SVGA3D_CONST_TYPE_INT:
memcpy(&cmd->values, value, sizeof cmd->values);
break;
case SVGA3D_CONST_TYPE_BOOL:
memset(&cmd->values, 0, sizeof cmd->values);
cmd->values[0] = *(uint32*)value;
break;
default:
SVGA_Panic("Bad shader constant type.");
break;
}
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetShader --
*
* Switch active shaders. This binds a new vertex or pixel shader
* to the specified context.
*
* A shader ID of SVGA3D_INVALID_ID unbinds any shader, switching
* back to the fixed function vertex or pixel pipeline.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetShader(uint32 cid, // IN
SVGA3dShaderType type, // IN
uint32 shid) // IN
{
SVGA3dCmdSetShader *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SET_SHADER, sizeof *cmd);
cmd->cid = cid;
cmd->type = type;
cmd->shid = shid;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginPresent --
*
* Begin a PRESENT command. This reserves space for it in the
* FIFO, and returns a pointer to the command's rectangle array.
* This function must be paired with SVGA_FIFOCommitAll().
*
* Present is the SVGA3D device's way of transferring fully
* rendered images to the 2D portion of the SVGA device. Present
* is a hardware accelerated surface-to-screen blit.
*
* Important caveats:
*
* - Present may or may not modify the guest-visible 2D
* framebuffer. If you need to read back rendering results,
* use an surface DMA transfer.
*
* - Present is a good place to think about flow control
* between the host and the guest. If the host and guest
* have no other form of synchronization, the FIFO could
* fill with many frames worth of rendering commands. The
* host will visibly lag the guest. Depending on the
* size of the FIFO and the size of the frames, it could
* lag by hours! It is advisable to use FIFO fences in order
* to guarantee that no more than one or two Presents are
* queued in the FIFO at any given time.
*
* Results:
* None.
*
* Side effects:
* May or may not write to the 2D framebuffer.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginPresent(uint32 sid, // IN
SVGA3dCopyRect **rects, // OUT
uint32 numRects) // IN
{
SVGA3dCmdPresent *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_PRESENT, sizeof *cmd +
sizeof **rects * numRects);
cmd->sid = sid;
*rects = (SVGA3dCopyRect*) &cmd[1];
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginClear --
*
* Begin a CLEAR command. This reserves space for it in the FIFO,
* and returns a pointer to the command's rectangle array. This
* function must be paired with SVGA_FIFOCommitAll().
*
* Clear is a rendering operation which fills a list of
* rectangles with constant values on all render target types
* indicated by 'flags'.
*
* Clear is not affected by clipping, depth test, or other
* render state which affects the fragment pipeline.
*
* Results:
* None.
*
* Side effects:
* May write to attached render target surfaces.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginClear(uint32 cid, // IN
SVGA3dClearFlag flags, // IN
uint32 color, // IN
float depth, // IN
uint32 stencil, // IN
SVGA3dRect **rects, // OUT
uint32 numRects) // IN
{
SVGA3dCmdClear *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_CLEAR, sizeof *cmd +
sizeof **rects * numRects);
cmd->cid = cid;
cmd->clearFlag = flags;
cmd->color = color;
cmd->depth = depth;
cmd->stencil = stencil;
*rects = (SVGA3dRect*) &cmd[1];
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginDrawPrimitives --
*
* Begin a DRAW_PRIMITIVES command. This reserves space for it in
* the FIFO, and returns a pointer to the command's arrays.
* This function must be paired with SVGA_FIFOCommitAll().
*
* Drawing commands consist of two variable-length arrays:
* SVGA3dVertexDecl elements declare a set of vertex buffers to
* use while rendering, and SVGA3dPrimitiveRange elements specify
* groups of primitives each with an optional index buffer.
*
* The decls and ranges arrays are initialized to zero.
*
* Results:
* None.
*
* Side effects:
* May write to attached render target surfaces.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginDrawPrimitives(uint32 cid, // IN
SVGA3dVertexDecl **decls, // OUT
uint32 numVertexDecls, // IN
SVGA3dPrimitiveRange **ranges, // OUT
uint32 numRanges) // IN
{
SVGA3dCmdDrawPrimitives *cmd;
SVGA3dVertexDecl *declArray;
SVGA3dPrimitiveRange *rangeArray;
uint32 declSize = sizeof **decls * numVertexDecls;
uint32 rangeSize = sizeof **ranges * numRanges;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_DRAW_PRIMITIVES, sizeof *cmd +
declSize + rangeSize);
cmd->cid = cid;
cmd->numVertexDecls = numVertexDecls;
cmd->numRanges = numRanges;
declArray = (SVGA3dVertexDecl*) &cmd[1];
rangeArray = (SVGA3dPrimitiveRange*) &declArray[numVertexDecls];
memset(declArray, 0, declSize);
memset(rangeArray, 0, rangeSize);
*decls = declArray;
*ranges = rangeArray;
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginSurfaceCopy --
*
* Begin a SURFACE_COPY command. This reserves space for it in
* the FIFO, and returns a pointer to the command's arrays. This
* function must be paired with SVGA_FIFOCommitAll().
*
* The box array is initialized with zeroes.
*
* Results:
* None.
*
* Side effects:
* Asynchronously copies a list of boxes from surface to surface.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginSurfaceCopy(SVGA3dSurfaceImageId *src, // IN
SVGA3dSurfaceImageId *dest, // IN
SVGA3dCopyBox **boxes, // OUT
uint32 numBoxes) // IN
{
SVGA3dCmdSurfaceCopy *cmd;
uint32 boxesSize = sizeof **boxes * numBoxes;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SURFACE_COPY, sizeof *cmd + boxesSize);
cmd->src = *src;
cmd->dest = *dest;
*boxes = (SVGA3dCopyBox*) &cmd[1];
memset(*boxes, 0, boxesSize);
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SurfaceStretchBlt --
*
* Issue a SURFACE_STRETCHBLT command: an asynchronous
* surface-to-surface blit, with scaling.
*
* Results:
* None.
*
* Side effects:
* Asynchronously copies one box from surface to surface.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SurfaceStretchBlt(SVGA3dSurfaceImageId *src, // IN
SVGA3dSurfaceImageId *dest, // IN
SVGA3dBox *boxSrc, // IN
SVGA3dBox *boxDest, // IN
SVGA3dStretchBltMode mode) // IN
{
SVGA3dCmdSurfaceStretchBlt *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SURFACE_STRETCHBLT, sizeof *cmd);
cmd->src = *src;
cmd->dest = *dest;
cmd->boxSrc = *boxSrc;
cmd->boxDest = *boxDest;
cmd->mode = mode;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetViewport --
*
* Set the current context's viewport rectangle. The viewport
* is clipped to the dimensions of the current render target,
* then all rendering is clipped to the viewport.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetViewport(uint32 cid, // IN
SVGA3dRect *rect) // IN
{
SVGA3dCmdSetViewport *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETVIEWPORT, sizeof *cmd);
cmd->cid = cid;
cmd->rect = *rect;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_SetZRange --
*
* Set the range of the depth buffer to use. 'min' and 'max'
* are values between 0.0 and 1.0.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_SetZRange(uint32 cid, // IN
float zMin, // IN
float zMax) // IN
{
SVGA3dCmdSetZRange *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETZRANGE, sizeof *cmd);
cmd->cid = cid;
cmd->zRange.min = zMin;
cmd->zRange.max = zMax;
SVGA_FIFOCommitAll();
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginSetTextureState --
*
* Begin a SETTEXTURESTATE command. This reserves space for it in
* the FIFO, and returns a pointer to the command's texture state
* array. This function must be paired with SVGA_FIFOCommitAll().
*
* This command sets rendering state which is per-texture-unit.
*
* XXX: Individual texture states need documentation. However,
* they are very similar to the texture states defined by
* Direct3D. The D3D documentation is a good starting point
* for understanding SVGA3D texture states.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginSetTextureState(uint32 cid, // IN
SVGA3dTextureState **states, // OUT
uint32 numStates) // IN
{
SVGA3dCmdSetTextureState *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETTEXTURESTATE, sizeof *cmd +
sizeof **states * numStates);
cmd->cid = cid;
*states = (SVGA3dTextureState*) &cmd[1];
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginSetRenderState --
*
* Begin a SETRENDERSTATE command. This reserves space for it in
* the FIFO, and returns a pointer to the command's texture state
* array. This function must be paired with SVGA_FIFOCommitAll().
*
* This command sets rendering state which is global to the context.
*
* XXX: Individual render states need documentation. However,
* they are very similar to the render states defined by
* Direct3D. The D3D documentation is a good starting point
* for understanding SVGA3D render states.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginSetRenderState(uint32 cid, // IN
SVGA3dRenderState **states, // OUT
uint32 numStates) // IN
{
SVGA3dCmdSetRenderState *cmd;
cmd = SVGA3D_FIFOReserve(SVGA_3D_CMD_SETRENDERSTATE, sizeof *cmd +
sizeof **states * numStates);
cmd->cid = cid;
*states = (SVGA3dRenderState*) &cmd[1];
}
/*
*----------------------------------------------------------------------
*
* SVGA3D_BeginPresentReadback --
*
* Begin a PRESENT_READBACK command. This reserves space for it
* in the FIFO, and returns a pointer to the command's SVGA3dRect
* array. This function must be paired with
* SVGA_FIFOCommitAll().
*
* This command will update the 2D framebuffer with the most
* recently presented data in the supplied regions.
*
* Results:
* None.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
void
SVGA3D_BeginPresentReadback(SVGA3dRect **rects, // OUT
uint32 numRects) // IN
{
void *cmd;
cmd = (void *) SVGA3D_FIFOReserve(SVGA_3D_CMD_PRESENT_READBACK,
sizeof **rects * numRects);
*rects = (SVGA3dRect*) cmd;
}
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