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render: First shot at moving metal backend over to new batching system.

This commit is contained in:
Ryan C. Gordon 2018-09-20 16:40:04 -04:00
parent 55cb9966db
commit 8955fb9b31
1 changed files with 395 additions and 289 deletions
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684
src/render/metal/SDL_render_metal.m
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@ -64,20 +64,16 @@ static int METAL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, void **pixels, int *pitch); const SDL_Rect * rect, void **pixels, int *pitch);
static void METAL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture); static void METAL_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int METAL_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture); static int METAL_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture);
static int METAL_UpdateViewport(SDL_Renderer * renderer); static int METAL_QueueDrawPoints(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPoint * points,
static int METAL_UpdateClipRect(SDL_Renderer * renderer); int count);
static int METAL_RenderClear(SDL_Renderer * renderer); static int METAL_QueueFillRects(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FRect * rects,
static int METAL_RenderDrawPoints(SDL_Renderer * renderer, int count);
const SDL_FPoint * points, int count); static int METAL_QueueCopy(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * texture,
static int METAL_RenderDrawLines(SDL_Renderer * renderer, const SDL_Rect * srcrect, const SDL_FRect * dstrect);
const SDL_FPoint * points, int count); static int METAL_QueueCopyEx(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * texture,
static int METAL_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect * srcquad, const SDL_FRect * dstrect,
const SDL_FRect * rects, int count); const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip);
static int METAL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, static int METAL_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertices, size_t vertsize);
const SDL_Rect * srcrect, const SDL_FRect * dstrect);
static int METAL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip);
static int METAL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, static int METAL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch); Uint32 pixel_format, void * pixels, int pitch);
static void METAL_RenderPresent(SDL_Renderer * renderer); static void METAL_RenderPresent(SDL_Renderer * renderer);
@ -113,6 +109,7 @@ SDL_RenderDriver METAL_RenderDriver = {
#define ALIGN_CONSTANTS(size) ((size + CONSTANT_ALIGN - 1) & (~(CONSTANT_ALIGN - 1))) #define ALIGN_CONSTANTS(size) ((size + CONSTANT_ALIGN - 1) & (~(CONSTANT_ALIGN - 1)))
static const size_t CONSTANTS_OFFSET_INVALID = 0xFFFFFFFF;
static const size_t CONSTANTS_OFFSET_IDENTITY = 0; static const size_t CONSTANTS_OFFSET_IDENTITY = 0;
static const size_t CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM = ALIGN_CONSTANTS(CONSTANTS_OFFSET_IDENTITY + sizeof(float) * 16); static const size_t CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM = ALIGN_CONSTANTS(CONSTANTS_OFFSET_IDENTITY + sizeof(float) * 16);
static const size_t CONSTANTS_OFFSET_DECODE_JPEG = ALIGN_CONSTANTS(CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM + sizeof(float) * 16); static const size_t CONSTANTS_OFFSET_DECODE_JPEG = ALIGN_CONSTANTS(CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM + sizeof(float) * 16);
@ -588,6 +585,9 @@ METAL_CreateRenderer(SDL_Window * window, Uint32 flags)
float clearverts[6] = {0.0f, 0.0f, 0.0f, 2.0f, 2.0f, 0.0f}; float clearverts[6] = {0.0f, 0.0f, 0.0f, 2.0f, 2.0f, 0.0f};
id<MTLBuffer> mtlbufconstantstaging = [data.mtldevice newBufferWithLength:CONSTANTS_LENGTH options:MTLResourceStorageModeShared]; id<MTLBuffer> mtlbufconstantstaging = [data.mtldevice newBufferWithLength:CONSTANTS_LENGTH options:MTLResourceStorageModeShared];
#if !__has_feature(objc_arc)
[mtlbufconstantstaging autorelease];
#endif
mtlbufconstantstaging.label = @"SDL constant staging data"; mtlbufconstantstaging.label = @"SDL constant staging data";
id<MTLBuffer> mtlbufconstants = [data.mtldevice newBufferWithLength:CONSTANTS_LENGTH options:MTLResourceStorageModePrivate]; id<MTLBuffer> mtlbufconstants = [data.mtldevice newBufferWithLength:CONSTANTS_LENGTH options:MTLResourceStorageModePrivate];
@ -621,14 +621,12 @@ METAL_CreateRenderer(SDL_Window * window, Uint32 flags)
renderer->LockTexture = METAL_LockTexture; renderer->LockTexture = METAL_LockTexture;
renderer->UnlockTexture = METAL_UnlockTexture; renderer->UnlockTexture = METAL_UnlockTexture;
renderer->SetRenderTarget = METAL_SetRenderTarget; renderer->SetRenderTarget = METAL_SetRenderTarget;
renderer->UpdateViewport = METAL_UpdateViewport; renderer->QueueDrawPoints = METAL_QueueDrawPoints;
renderer->UpdateClipRect = METAL_UpdateClipRect; renderer->QueueDrawLines = METAL_QueueDrawPoints; // lines and points queue the same way.
renderer->RenderClear = METAL_RenderClear; renderer->QueueFillRects = METAL_QueueFillRects;
renderer->RenderDrawPoints = METAL_RenderDrawPoints; renderer->QueueCopy = METAL_QueueCopy;
renderer->RenderDrawLines = METAL_RenderDrawLines; renderer->QueueCopyEx = METAL_QueueCopyEx;
renderer->RenderFillRects = METAL_RenderFillRects; renderer->RunCommandQueue = METAL_RunCommandQueue;
renderer->RenderCopy = METAL_RenderCopy;
renderer->RenderCopyEx = METAL_RenderCopyEx;
renderer->RenderReadPixels = METAL_RenderReadPixels; renderer->RenderReadPixels = METAL_RenderReadPixels;
renderer->RenderPresent = METAL_RenderPresent; renderer->RenderPresent = METAL_RenderPresent;
renderer->DestroyTexture = METAL_DestroyTexture; renderer->DestroyTexture = METAL_DestroyTexture;
@ -698,7 +696,7 @@ METAL_CreateRenderer(SDL_Window * window, Uint32 flags)
}} }}
static void static void
METAL_ActivateRenderCommandEncoder(SDL_Renderer * renderer, MTLLoadAction load) METAL_ActivateRenderCommandEncoder(SDL_Renderer * renderer, MTLLoadAction load, MTLClearColor *clear_color)
{ {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata; METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
@ -725,8 +723,8 @@ METAL_ActivateRenderCommandEncoder(SDL_Renderer * renderer, MTLLoadAction load)
SDL_assert(mtltexture); SDL_assert(mtltexture);
if (load == MTLLoadActionClear) { if (load == MTLLoadActionClear) {
MTLClearColor color = MTLClearColorMake(renderer->r/255.0, renderer->g/255.0, renderer->b/255.0, renderer->a/255.0); SDL_assert(clear_color != NULL);
data.mtlpassdesc.colorAttachments[0].clearColor = color; data.mtlpassdesc.colorAttachments[0].clearColor = *clear_color;
} }
data.mtlpassdesc.colorAttachments[0].loadAction = load; data.mtlpassdesc.colorAttachments[0].loadAction = load;
@ -742,10 +740,6 @@ METAL_ActivateRenderCommandEncoder(SDL_Renderer * renderer, MTLLoadAction load)
} }
data.activepipelines = ChooseShaderPipelines(data, mtltexture.pixelFormat); data.activepipelines = ChooseShaderPipelines(data, mtltexture.pixelFormat);
/* Make sure the viewport and clip rect are set on the new render pass. */
METAL_UpdateViewport(renderer);
METAL_UpdateClipRect(renderer);
} }
} }
@ -1024,126 +1018,6 @@ METAL_SetRenderTarget(SDL_Renderer * renderer, SDL_Texture * texture)
return 0; return 0;
}} }}
static int
METAL_SetOrthographicProjection(SDL_Renderer *renderer, int w, int h)
{ @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
float projection[4][4];
if (!w || !h) {
return 0;
}
/* Prepare an orthographic projection */
projection[0][0] = 2.0f / w;
projection[0][1] = 0.0f;
projection[0][2] = 0.0f;
projection[0][3] = 0.0f;
projection[1][0] = 0.0f;
projection[1][1] = -2.0f / h;
projection[1][2] = 0.0f;
projection[1][3] = 0.0f;
projection[2][0] = 0.0f;
projection[2][1] = 0.0f;
projection[2][2] = 0.0f;
projection[2][3] = 0.0f;
projection[3][0] = -1.0f;
projection[3][1] = 1.0f;
projection[3][2] = 0.0f;
projection[3][3] = 1.0f;
// !!! FIXME: This should be in a buffer...
[data.mtlcmdencoder setVertexBytes:projection length:sizeof(float)*16 atIndex:2];
return 0;
}}
static int
METAL_UpdateViewport(SDL_Renderer * renderer)
{ @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
if (data.mtlcmdencoder) {
MTLViewport viewport;
viewport.originX = renderer->viewport.x;
viewport.originY = renderer->viewport.y;
viewport.width = renderer->viewport.w;
viewport.height = renderer->viewport.h;
viewport.znear = 0.0;
viewport.zfar = 1.0;
[data.mtlcmdencoder setViewport:viewport];
METAL_SetOrthographicProjection(renderer, renderer->viewport.w, renderer->viewport.h);
}
return 0;
}}
static int
METAL_UpdateClipRect(SDL_Renderer * renderer)
{ @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
if (data.mtlcmdencoder) {
MTLScissorRect mtlrect;
// !!! FIXME: should this care about the viewport?
if (renderer->clipping_enabled) {
const SDL_Rect *rect = &renderer->clip_rect;
mtlrect.x = renderer->viewport.x + rect->x;
mtlrect.y = renderer->viewport.x + rect->y;
mtlrect.width = rect->w;
mtlrect.height = rect->h;
} else {
mtlrect.x = renderer->viewport.x;
mtlrect.y = renderer->viewport.y;
mtlrect.width = renderer->viewport.w;
mtlrect.height = renderer->viewport.h;
}
if (mtlrect.width > 0 && mtlrect.height > 0) {
[data.mtlcmdencoder setScissorRect:mtlrect];
}
}
return 0;
}}
static int
METAL_RenderClear(SDL_Renderer * renderer)
{ @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
/* Since we set up the render command encoder lazily when a draw is
* requested, we can do the fast path hardware clear if no draws have
* happened since the last SetRenderTarget. */
if (data.mtlcmdencoder == nil) {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionClear);
} else {
// !!! FIXME: render color should live in a dedicated uniform buffer.
const float color[4] = { ((float)renderer->r) / 255.0f, ((float)renderer->g) / 255.0f, ((float)renderer->b) / 255.0f, ((float)renderer->a) / 255.0f };
MTLViewport viewport; // RenderClear ignores the viewport state, though, so reset that.
viewport.originX = viewport.originY = 0.0;
viewport.width = data.mtlpassdesc.colorAttachments[0].texture.width;
viewport.height = data.mtlpassdesc.colorAttachments[0].texture.height;
viewport.znear = 0.0;
viewport.zfar = 1.0;
// Slow path for clearing: draw a filled fullscreen triangle.
METAL_SetOrthographicProjection(renderer, 1, 1);
[data.mtlcmdencoder setViewport:viewport];
[data.mtlcmdencoder setRenderPipelineState:ChoosePipelineState(data, data.activepipelines, SDL_METAL_FRAGMENT_SOLID, SDL_BLENDMODE_NONE)];
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:CONSTANTS_OFFSET_CLEAR_VERTS atIndex:0];
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:CONSTANTS_OFFSET_IDENTITY atIndex:3];
[data.mtlcmdencoder setFragmentBytes:color length:sizeof(color) atIndex:0];
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangle vertexStart:0 vertexCount:3];
// reset the viewport for the rest of our usual drawing work...
viewport.originX = renderer->viewport.x;
viewport.originY = renderer->viewport.y;
viewport.width = renderer->viewport.w;
viewport.height = renderer->viewport.h;
viewport.znear = 0.0;
viewport.zfar = 1.0;
[data.mtlcmdencoder setViewport:viewport];
METAL_SetOrthographicProjection(renderer, renderer->viewport.w, renderer->viewport.h);
}
return 0;
}}
// normalize a value from 0.0f to len into 0.0f to 1.0f. // normalize a value from 0.0f to len into 0.0f to 1.0f.
static inline float static inline float
@ -1153,145 +1027,113 @@ normtex(const float _val, const float len)
} }
static int static int
DrawVerts(SDL_Renderer * renderer, const SDL_FPoint * points, int count, METAL_QueueDrawPoints(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FPoint * points, int count)
const MTLPrimitiveType primtype) {
{ @autoreleasepool {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad);
const size_t vertlen = (sizeof (float) * 2) * count; const size_t vertlen = (sizeof (float) * 2) * count;
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata; float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, &cmd->data.draw.first);
if (!verts) {
// !!! FIXME: render color should live in a dedicated uniform buffer. return -1;
const float color[4] = { ((float)renderer->r) / 255.0f, ((float)renderer->g) / 255.0f, ((float)renderer->b) / 255.0f, ((float)renderer->a) / 255.0f }; }
cmd->data.draw.count = count;
[data.mtlcmdencoder setRenderPipelineState:ChoosePipelineState(data, data.activepipelines, SDL_METAL_FRAGMENT_SOLID, renderer->blendMode)]; SDL_memcpy(verts, points, vertlen);
[data.mtlcmdencoder setFragmentBytes:color length:sizeof(color) atIndex:0];
[data.mtlcmdencoder setVertexBytes:points length:vertlen atIndex:0];
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM atIndex:3];
[data.mtlcmdencoder drawPrimitives:primtype vertexStart:0 vertexCount:count];
return 0; return 0;
}}
static int
METAL_RenderDrawPoints(SDL_Renderer * renderer, const SDL_FPoint * points, int count)
{
return DrawVerts(renderer, points, count, MTLPrimitiveTypePoint);
} }
static int static int
METAL_RenderDrawLines(SDL_Renderer * renderer, const SDL_FPoint * points, int count) METAL_QueueFillRects(SDL_Renderer * renderer, SDL_RenderCommand *cmd, const SDL_FRect * rects, int count)
{ {
return DrawVerts(renderer, points, count, MTLPrimitiveTypeLineStrip); // !!! FIXME: use an index buffer
} const size_t vertlen = (sizeof (float) * 8) * count;
float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, &cmd->data.draw.first);
if (!verts) {
return -1;
}
static int cmd->data.draw.count = count;
METAL_RenderFillRects(SDL_Renderer * renderer, const SDL_FRect * rects, int count)
{ @autoreleasepool {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad);
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
// !!! FIXME: render color should live in a dedicated uniform buffer.
const float color[4] = { ((float)renderer->r) / 255.0f, ((float)renderer->g) / 255.0f, ((float)renderer->b) / 255.0f, ((float)renderer->a) / 255.0f };
[data.mtlcmdencoder setRenderPipelineState:ChoosePipelineState(data, data.activepipelines, SDL_METAL_FRAGMENT_SOLID, renderer->blendMode)];
[data.mtlcmdencoder setFragmentBytes:color length:sizeof(color) atIndex:0];
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:CONSTANTS_OFFSET_IDENTITY atIndex:3];
for (int i = 0; i < count; i++, rects++) { for (int i = 0; i < count; i++, rects++) {
if ((rects->w <= 0.0f) || (rects->h <= 0.0f)) continue; if ((rects->w <= 0.0f) || (rects->h <= 0.0f)) {
cmd->data.draw.count--;
} else {
*(verts++) = rects->x;
*(verts++) = rects->y + rects->h;
*(verts++) = rects->x;
*(verts++) = rects->y;
*(verts++) = rects->x + rects->w;
*(verts++) = rects->y + rects->h;
*(verts++) = rects->x + rects->w;
*(verts++) = rects->y;
}
}
const float verts[] = { if (cmd->data.draw.count == 0) {
rects->x, rects->y + rects->h, cmd->command = SDL_RENDERCMD_NO_OP; // nothing to do, just skip this one later.
rects->x, rects->y,
rects->x + rects->w, rects->y + rects->h,
rects->x + rects->w, rects->y
};
[data.mtlcmdencoder setVertexBytes:verts length:sizeof(verts) atIndex:0];
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:4];
} }
return 0; return 0;
}}
static void
METAL_SetupRenderCopy(METAL_RenderData *data, SDL_Texture *texture, METAL_TextureData *texturedata)
{
float color[4] = { 1.0f, 1.0f, 1.0f, 1.0f };
if (texture->modMode) {
color[0] = ((float)texture->r) / 255.0f;
color[1] = ((float)texture->g) / 255.0f;
color[2] = ((float)texture->b) / 255.0f;
color[3] = ((float)texture->a) / 255.0f;
}
[data.mtlcmdencoder setRenderPipelineState:ChoosePipelineState(data, data.activepipelines, texturedata.fragmentFunction, texture->blendMode)];
[data.mtlcmdencoder setFragmentBytes:color length:sizeof(color) atIndex:0];
[data.mtlcmdencoder setFragmentSamplerState:texturedata.mtlsampler atIndex:0];
[data.mtlcmdencoder setFragmentTexture:texturedata.mtltexture atIndex:0];
if (texturedata.yuv || texturedata.nv12) {
[data.mtlcmdencoder setFragmentTexture:texturedata.mtltexture_uv atIndex:1];
[data.mtlcmdencoder setFragmentBuffer:data.mtlbufconstants offset:texturedata.conversionBufferOffset atIndex:1];
}
} }
static int static int
METAL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture, METAL_QueueCopy(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect) const SDL_Rect * srcrect, const SDL_FRect * dstrect)
{ @autoreleasepool { {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad);
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata; METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata;
const float texw = (float) texturedata.mtltexture.width; const float texw = (float) texturedata.mtltexture.width;
const float texh = (float) texturedata.mtltexture.height; const float texh = (float) texturedata.mtltexture.height;
// !!! FIXME: use an index buffer
const size_t vertlen = (sizeof (float) * 16);
float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, &cmd->data.draw.first);
if (!verts) {
return -1;
}
METAL_SetupRenderCopy(data, texture, texturedata); cmd->data.draw.count = 1;
const float xy[] = { *(verts++) = dstrect->x;
dstrect->x, dstrect->y + dstrect->h, *(verts++) = dstrect->y + dstrect->h;
dstrect->x, dstrect->y, *(verts++) = dstrect->x;
dstrect->x + dstrect->w, dstrect->y + dstrect->h, *(verts++) = dstrect->y;
dstrect->x + dstrect->w, dstrect->y *(verts++) = dstrect->x + dstrect->w;
}; *(verts++) = dstrect->y + dstrect->h;
*(verts++) = dstrect->x + dstrect->w;
*(verts++) = dstrect->y;
const float uv[] = { *(verts++) = normtex(srcrect->x, texw);
normtex(srcrect->x, texw), normtex(srcrect->y + srcrect->h, texh), *(verts++) = normtex(srcrect->y + srcrect->h, texh);
normtex(srcrect->x, texw), normtex(srcrect->y, texh), *(verts++) = normtex(srcrect->x, texw);
normtex(srcrect->x + srcrect->w, texw), normtex(srcrect->y + srcrect->h, texh), *(verts++) = normtex(srcrect->y, texh);
normtex(srcrect->x + srcrect->w, texw), normtex(srcrect->y, texh) *(verts++) = normtex(srcrect->x + srcrect->w, texw);
}; *(verts++) = normtex(srcrect->y + srcrect->h, texh);
*(verts++) = normtex(srcrect->x + srcrect->w, texw);
[data.mtlcmdencoder setVertexBytes:xy length:sizeof(xy) atIndex:0]; *(verts++) = normtex(srcrect->y, texh);
[data.mtlcmdencoder setVertexBytes:uv length:sizeof(uv) atIndex:1];
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:CONSTANTS_OFFSET_IDENTITY atIndex:3];
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:4];
return 0; return 0;
}} }
static int static int
METAL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture, METAL_QueueCopyEx(SDL_Renderer * renderer, SDL_RenderCommand *cmd, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_FRect * dstrect, const SDL_Rect * srcquad, const SDL_FRect * dstrect,
const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip) const double angle, const SDL_FPoint *center, const SDL_RendererFlip flip)
{ @autoreleasepool { {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad);
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata; METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata;
const float texw = (float) texturedata.mtltexture.width; const float texw = (float) texturedata.mtltexture.width;
const float texh = (float) texturedata.mtltexture.height; const float texh = (float) texturedata.mtltexture.height;
float transform[16]; const float rads = (float)(M_PI * (float) angle / 180.0f);
const float c = cosf(rads), s = sinf(rads);
float minu, maxu, minv, maxv; float minu, maxu, minv, maxv;
// !!! FIXME: use an index buffer
const size_t vertlen = (sizeof (float) * 32);
float *verts = (float *) SDL_AllocateRenderVertices(renderer, vertlen, &cmd->data.draw.first);
if (!verts) {
return -1;
}
METAL_SetupRenderCopy(data, texture, texturedata); cmd->data.draw.count = 1;
minu = normtex(srcrect->x, texw); minu = normtex(srcquad->x, texw);
maxu = normtex(srcrect->x + srcrect->w, texw); maxu = normtex(srcquad->x + srcquad->w, texw);
minv = normtex(srcrect->y, texh); minv = normtex(srcquad->y, texh);
maxv = normtex(srcrect->y + srcrect->h, texh); maxv = normtex(srcquad->y + srcquad->h, texh);
if (flip & SDL_FLIP_HORIZONTAL) { if (flip & SDL_FLIP_HORIZONTAL) {
float tmp = maxu; float tmp = maxu;
@ -1304,42 +1146,300 @@ METAL_RenderCopyEx(SDL_Renderer * renderer, SDL_Texture * texture,
minv = tmp; minv = tmp;
} }
const float uv[] = { // vertices
minu, maxv, *(verts++) = -center->x;
minu, minv, *(verts++) = dstrect->h - center->y;
maxu, maxv, *(verts++) = -center->x;
maxu, minv *(verts++) = -center->y;
}; *(verts++) = dstrect->w - center->x;
*(verts++) = dstrect->h - center->y;
*(verts++) = dstrect->w - center->x;
*(verts++) = -center->y;
const float xy[] = { // texcoords
-center->x, dstrect->h - center->y, *(verts++) = minu;
-center->x, -center->y, *(verts++) = maxv;
dstrect->w - center->x, dstrect->h - center->y, *(verts++) = minu;
dstrect->w - center->x, -center->y *(verts++) = minv;
}; *(verts++) = maxu;
*(verts++) = maxv;
*(verts++) = maxu;
*(verts++) = minv;
{ // transform matrix
float rads = (float)(M_PI * (float) angle / 180.0f); SDL_memset(verts, '\0', sizeof (*verts) * 16);
float c = cosf(rads), s = sinf(rads); verts[10] = verts[15] = 1.0f;
SDL_memset(transform, 0, sizeof(transform)); // rotation
verts[0] = c;
verts[1] = s;
verts[4] = -s;
verts[5] = c;
transform[10] = transform[15] = 1.0f; // translation
verts[12] = dstrect->x + center->x;
verts[13] = dstrect->y + center->y;
/* Rotation */ return 0;
transform[0] = c; }
transform[1] = s;
transform[4] = -s;
transform[5] = c;
/* Translation */
transform[12] = dstrect->x + center->x; typedef struct
transform[13] = dstrect->y + center->y; {
id<MTLRenderPipelineState> pipeline;
size_t constants_offset;
SDL_Texture *texture;
Uint32 color;
SDL_bool color_dirty;
SDL_bool cliprect_dirty;
SDL_bool cliprect_enabled;
SDL_bool viewport_dirty;
SDL_Rect viewport;
SDL_Rect cliprect;
} METAL_DrawStateCache;
static void
SetDrawState(SDL_Renderer *renderer, const SDL_RenderCommand *cmd, const SDL_MetalFragmentFunction shader,
const size_t constants_offset, id<MTLBuffer> mtlbufvertex, METAL_DrawStateCache *statecache)
{
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
const Uint8 r = cmd->data.draw.r;
const Uint8 g = cmd->data.draw.g;
const Uint8 b = cmd->data.draw.b;
const Uint8 a = cmd->data.draw.a;
const Uint32 color = ((a << 24) | (r << 16) | (g << 8) | b);
const SDL_BlendMode blend = cmd->data.draw.blend;
id<MTLRenderPipelineState> newpipeline;
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad, NULL);
if (statecache->viewport_dirty) {
MTLViewport viewport;
viewport.originX = statecache->viewport.x;
viewport.originY = statecache->viewport.y;
viewport.width = statecache->viewport.w;
viewport.height = statecache->viewport.h;
viewport.znear = 0.0;
viewport.zfar = 1.0;
[data.mtlcmdencoder setViewport:viewport];
float projection[4][4]; /* Prepare an orthographic projection */
SDL_memset(projection, '\0', sizeof (projection));
if (statecache->viewport.w && statecache->viewport.h) {
projection[0][0] = 2.0f / statecache->viewport.w;
projection[1][1] = -2.0f / statecache->viewport.h;
projection[3][0] = -1.0f;
projection[3][1] = 1.0f;
projection[3][3] = 1.0f;
}
// !!! FIXME: This should be in a buffer...
[data.mtlcmdencoder setVertexBytes:projection length:sizeof(float)*16 atIndex:2];
statecache->viewport_dirty = SDL_FALSE;
} }
[data.mtlcmdencoder setVertexBytes:xy length:sizeof(xy) atIndex:0]; if (statecache->cliprect_dirty) {
[data.mtlcmdencoder setVertexBytes:uv length:sizeof(uv) atIndex:1]; MTLScissorRect mtlrect;
[data.mtlcmdencoder setVertexBytes:transform length:sizeof(transform) atIndex:3]; if (statecache->cliprect_enabled) {
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:4]; const SDL_Rect *rect = &statecache->cliprect;
mtlrect.x = statecache->viewport.x + rect->x;
mtlrect.y = statecache->viewport.y + rect->y;
mtlrect.width = rect->w;
mtlrect.height = rect->h;
} else {
mtlrect.x = statecache->viewport.x;
mtlrect.y = statecache->viewport.y;
mtlrect.width = statecache->viewport.w;
mtlrect.height = statecache->viewport.h;
}
if (mtlrect.width > 0 && mtlrect.height > 0) {
[data.mtlcmdencoder setScissorRect:mtlrect];
}
statecache->cliprect_dirty = SDL_FALSE;
}
if (statecache->color_dirty || (color != statecache->color)) {
const float colorf[4] = { ((float)r) / 255.0f, ((float)g) / 255.0f, ((float)b) / 255.0f, ((float)a) / 255.0f };
[data.mtlcmdencoder setFragmentBytes:colorf length:sizeof(colorf) atIndex:0];
statecache->color_dirty = SDL_FALSE;
statecache->color = color;
}
newpipeline = ChoosePipelineState(data, data.activepipelines, shader, blend);
if (newpipeline != statecache->pipeline) {
[data.mtlcmdencoder setRenderPipelineState:newpipeline];
statecache->pipeline = newpipeline;
}
if (constants_offset != statecache->constants_offset) {
if (constants_offset != CONSTANTS_OFFSET_INVALID) {
[data.mtlcmdencoder setVertexBuffer:data.mtlbufconstants offset:constants_offset atIndex:3];
}
statecache->constants_offset = constants_offset;
}
[data.mtlcmdencoder setVertexBuffer:mtlbufvertex offset:cmd->data.draw.first atIndex:0]; // position
}
static void
SetCopyState(SDL_Renderer *renderer, const SDL_RenderCommand *cmd, const size_t constants_offset,
id<MTLBuffer> mtlbufvertex, METAL_DrawStateCache *statecache)
{
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
SDL_Texture *texture = cmd->data.draw.texture;
METAL_TextureData *texturedata = (__bridge METAL_TextureData *)texture->driverdata;
SetDrawState(renderer, cmd, texturedata.fragmentFunction, constants_offset, mtlbufvertex, statecache);
[data.mtlcmdencoder setVertexBuffer:mtlbufvertex offset:cmd->data.draw.first+(8*sizeof (float)) atIndex:1]; // texcoords
if (texture != statecache->texture) {
METAL_TextureData *oldtexturedata = NULL;
if (statecache->texture) {
oldtexturedata = (__bridge METAL_TextureData *) statecache->texture->driverdata;
}
if (!oldtexturedata || (texturedata.mtlsampler != oldtexturedata.mtlsampler)) {
[data.mtlcmdencoder setFragmentSamplerState:texturedata.mtlsampler atIndex:0];
}
[data.mtlcmdencoder setFragmentTexture:texturedata.mtltexture atIndex:0];
if (texturedata.yuv || texturedata.nv12) {
[data.mtlcmdencoder setFragmentTexture:texturedata.mtltexture_uv atIndex:1];
[data.mtlcmdencoder setFragmentBuffer:data.mtlbufconstants offset:texturedata.conversionBufferOffset atIndex:1];
}
statecache->texture = texture;
}
}
static int
METAL_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertices, size_t vertsize)
{ @autoreleasepool {
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_DrawStateCache statecache;
statecache.pipeline = nil;
statecache.constants_offset = CONSTANTS_OFFSET_INVALID;
statecache.texture = NULL;
statecache.color = ((renderer->a << 24) | (renderer->r << 16) | (renderer->g << 8) | renderer->b);
statecache.color_dirty = SDL_TRUE;
statecache.cliprect_dirty = SDL_TRUE;
statecache.viewport_dirty = SDL_TRUE; // TRUE so we set ortho matrix
statecache.cliprect_enabled = renderer->clipping_enabled;
SDL_memcpy(&statecache.viewport, &renderer->viewport, sizeof (statecache.viewport));
SDL_memcpy(&statecache.cliprect, &renderer->clip_rect, sizeof (statecache.cliprect));
// !!! FIXME: have a ring of pre-made MTLBuffers we cycle through? How expensive is creation?
id<MTLBuffer> mtlbufvertexstaging = [data.mtldevice newBufferWithLength:vertsize options:MTLResourceStorageModeShared];
#if !__has_feature(objc_arc)
[mtlbufvertexstaging autorelease];
#endif
mtlbufvertexstaging.label = @"SDL vertex staging data";
SDL_memcpy([mtlbufvertexstaging contents], vertices, vertsize);
// Move our new vertex buffer from system RAM to GPU memory so any draw calls can use it.
id<MTLBuffer> mtlbufvertex = [data.mtldevice newBufferWithLength:vertsize options:MTLResourceStorageModePrivate];
#if !__has_feature(objc_arc)
[mtlbufvertex autorelease];
#endif
mtlbufvertex.label = @"SDL vertex data";
id<MTLCommandBuffer> cmdbuffer = [data.mtlcmdqueue commandBuffer];
id<MTLBlitCommandEncoder> blitcmd = [cmdbuffer blitCommandEncoder];
[blitcmd copyFromBuffer:mtlbufvertexstaging sourceOffset:0 toBuffer:mtlbufvertex destinationOffset:0 size:vertsize];
[blitcmd endEncoding];
[cmdbuffer commit];
// If there's a command buffer here unexpectedly (app requested one?). Commit it so we can start fresh.
[data.mtlcmdencoder endEncoding];
[data.mtlcmdbuffer commit];
data.mtlcmdencoder = nil;
data.mtlcmdbuffer = nil;
while (cmd) {
switch (cmd->command) {
case SDL_RENDERCMD_SETVIEWPORT: {
if (SDL_memcmp(&statecache.viewport, &cmd->data.viewport, sizeof (statecache.viewport)) != 0) {
SDL_memcpy(&statecache.viewport, &cmd->data.viewport, sizeof (statecache.viewport));
statecache.viewport_dirty = SDL_TRUE;
}
break;
}
case SDL_RENDERCMD_SETCLIPRECT: {
if ((statecache.cliprect_enabled != cmd->data.cliprect.enabled) ||
(SDL_memcmp(&statecache.cliprect, &cmd->data.cliprect.rect, sizeof (statecache.cliprect)) != 0)) {
SDL_memcpy(&statecache.cliprect, &cmd->data.cliprect.rect, sizeof (statecache.cliprect));
statecache.cliprect_enabled = cmd->data.cliprect.enabled;
statecache.cliprect_dirty = SDL_TRUE;
}
break;
}
case SDL_RENDERCMD_CLEAR: {
/* If we're already encoding a command buffer, dump it without committing it. We'd just
clear all its work anyhow, and starting a new encoder will let us use a hardware clear
operation via MTLLoadActionClear. */
if (data.mtlcmdencoder != nil) {
[data.mtlcmdencoder endEncoding];
data.mtlcmdencoder = nil;
data.mtlcmdbuffer = nil;
}
const Uint8 r = cmd->data.color.r;
const Uint8 g = cmd->data.color.g;
const Uint8 b = cmd->data.color.b;
const Uint8 a = cmd->data.color.a;
MTLClearColor color = MTLClearColorMake(r / 255.0f, g / 255.0f, b / 255.0f, a / 255.0f);
// force all this state to be reconfigured on next command buffer.
statecache.pipeline = nil;
statecache.constants_offset = CONSTANTS_OFFSET_INVALID;
statecache.texture = NULL;
statecache.color_dirty = SDL_TRUE;
statecache.cliprect_dirty = SDL_TRUE;
statecache.viewport_dirty = SDL_TRUE;
// get new command encoder, set up with an initial clear operation.
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionClear, &color);
break;
}
case SDL_RENDERCMD_DRAW_POINTS:
case SDL_RENDERCMD_DRAW_LINES: {
const size_t count = cmd->data.draw.count;
const MTLPrimitiveType primtype = (cmd->command == SDL_RENDERCMD_DRAW_POINTS) ? MTLPrimitiveTypePoint : MTLPrimitiveTypeLineStrip;
SetDrawState(renderer, cmd, SDL_METAL_FRAGMENT_SOLID, CONSTANTS_OFFSET_HALF_PIXEL_TRANSFORM, mtlbufvertex, &statecache);
[data.mtlcmdencoder drawPrimitives:primtype vertexStart:0 vertexCount:count];
break;
}
case SDL_RENDERCMD_FILL_RECTS: {
const size_t count = cmd->data.draw.count;
size_t start = 0;
SetDrawState(renderer, cmd, SDL_METAL_FRAGMENT_SOLID, CONSTANTS_OFFSET_IDENTITY, mtlbufvertex, &statecache);
for (size_t i = 0; i < count; i++, start += 4) { // !!! FIXME: can we do all of these this with a single draw call, using MTLPrimitiveTypeTriangle and an index buffer?
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:start vertexCount:4];
}
break;
}
case SDL_RENDERCMD_COPY: {
SetCopyState(renderer, cmd, CONSTANTS_OFFSET_IDENTITY, mtlbufvertex, &statecache);
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:4];
break;
}
case SDL_RENDERCMD_COPY_EX: {
SetCopyState(renderer, cmd, CONSTANTS_OFFSET_INVALID, mtlbufvertex, &statecache);
[data.mtlcmdencoder setVertexBuffer:mtlbufvertex offset:cmd->data.draw.first+(16*sizeof (float)) atIndex:3]; // transform
[data.mtlcmdencoder drawPrimitives:MTLPrimitiveTypeTriangleStrip vertexStart:0 vertexCount:4];
break;
}
case SDL_RENDERCMD_NO_OP:
break;
}
cmd = cmd->next;
}
return 0; return 0;
}} }}
@ -1348,10 +1448,16 @@ static int
METAL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect, METAL_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 pixel_format, void * pixels, int pitch) Uint32 pixel_format, void * pixels, int pitch)
{ @autoreleasepool { { @autoreleasepool {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad);
// !!! FIXME: this probably needs to commit the current command buffer, and probably waitUntilCompleted
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata; METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad, NULL);
// Commit any current command buffer, and waitUntilCompleted, so any output is ready to be read.
[data.mtlcmdencoder endEncoding];
[data.mtlcmdbuffer commit];
[data.mtlcmdbuffer waitUntilCompleted];
data.mtlcmdencoder = nil;
data.mtlcmdbuffer = nil;
id<MTLTexture> mtltexture = data.mtlpassdesc.colorAttachments[0].texture; id<MTLTexture> mtltexture = data.mtlpassdesc.colorAttachments[0].texture;
MTLRegion mtlregion = MTLRegionMake2D(rect->x, rect->y, rect->w, rect->h); MTLRegion mtlregion = MTLRegionMake2D(rect->x, rect->y, rect->w, rect->h);
@ -1422,7 +1528,7 @@ METAL_GetMetalLayer(SDL_Renderer * renderer)
static void * static void *
METAL_GetMetalCommandEncoder(SDL_Renderer * renderer) METAL_GetMetalCommandEncoder(SDL_Renderer * renderer)
{ @autoreleasepool { { @autoreleasepool {
METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad); METAL_ActivateRenderCommandEncoder(renderer, MTLLoadActionLoad, NULL);
METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata; METAL_RenderData *data = (__bridge METAL_RenderData *) renderer->driverdata;
return (__bridge void*)data.mtlcmdencoder; return (__bridge void*)data.mtlcmdencoder;
}} }}