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Implemented render batching for D3D9

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This commit is contained in:
Sam Lantinga
2025-11-11 08:01:18 -08:00
parent a63e848509
commit 5bed8ec603
1 changed files with 108 additions and 38 deletions
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146
src/render/direct3d/SDL_render_d3d.c
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@@ -1313,10 +1313,7 @@ static bool D3D_RunCommandQueue(SDL_Renderer *renderer, SDL_RenderCommand *cmd,
switch (cmd->command) { switch (cmd->command) {
case SDL_RENDERCMD_SETDRAWCOLOR: case SDL_RENDERCMD_SETDRAWCOLOR:
{ {
/* currently this is sent with each vertex, but if we move to break; // this isn't currently used in this render backend.
shaders, we can put this in a uniform here and reduce vertex
buffer bandwidth */
break;
} }
case SDL_RENDERCMD_SETVIEWPORT: case SDL_RENDERCMD_SETVIEWPORT:
@@ -1377,43 +1374,74 @@ static bool D3D_RunCommandQueue(SDL_Renderer *renderer, SDL_RenderCommand *cmd,
break; break;
} }
case SDL_RENDERCMD_DRAW_POINTS:
{
const size_t count = cmd->data.draw.count;
const size_t first = cmd->data.draw.first;
SetDrawState(data, cmd);
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_POINTLIST, (UINT)(first / sizeof(Vertex)), (UINT)count);
} else {
const Vertex *verts = (Vertex *)(((Uint8 *)vertices) + first);
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_POINTLIST, (UINT)count, verts, sizeof(Vertex));
}
break;
}
case SDL_RENDERCMD_DRAW_LINES: case SDL_RENDERCMD_DRAW_LINES:
{ {
const size_t count = cmd->data.draw.count; size_t count = cmd->data.draw.count;
const size_t first = cmd->data.draw.first; const size_t first = cmd->data.draw.first;
const size_t start = first / sizeof(Vertex);
const Vertex *verts = (Vertex *)(((Uint8 *)vertices) + first); const Vertex *verts = (Vertex *)(((Uint8 *)vertices) + first);
/* DirectX 9 has the same line rasterization semantics as GDI,
so we need to close the endpoint of the line with a second draw call.
NOLINTNEXTLINE(clang-analyzer-core.NullDereference): FIXME: Can verts truly not be NULL ? */
const bool close_endpoint = ((count == 2) || (verts[0].x != verts[count - 1].x) || (verts[0].y != verts[count - 1].y));
SetDrawState(data, cmd); SetDrawState(data, cmd);
if (vbo) { // Add the final point in the line
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_LINESTRIP, (UINT)(first / sizeof(Vertex)), (UINT)(count - 1)); size_t line_start = 0;
if (close_endpoint) { size_t line_end = line_start + count - 1;
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_POINTLIST, (UINT)((first / sizeof(Vertex)) + (count - 1)), 1); if (count == 2 || verts[line_start].x != verts[line_end].x || verts[line_start].y != verts[line_end].y) {
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_POINTLIST, (UINT)(start + line_end), 1);
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_POINTLIST, 1, &verts[line_end], sizeof(Vertex));
}
}
if (count > 2) {
// joined lines cannot be grouped
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_LINESTRIP, (UINT)start, (UINT)(count - 1));
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_LINESTRIP, (UINT)(count - 1), verts, sizeof(Vertex));
} }
} else { } else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_LINESTRIP, (UINT)(count - 1), verts, sizeof(Vertex)); // let's group non joined lines
if (close_endpoint) { SDL_RenderCommand *finalcmd = cmd;
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_POINTLIST, 1, &verts[count - 1], sizeof(Vertex)); SDL_RenderCommand *nextcmd;
SDL_BlendMode thisblend = cmd->data.draw.blend;
for (nextcmd = cmd->next; nextcmd; nextcmd = nextcmd->next) {
const SDL_RenderCommandType nextcmdtype = nextcmd->command;
if (nextcmdtype != SDL_RENDERCMD_DRAW_LINES) {
if (nextcmdtype == SDL_RENDERCMD_SETDRAWCOLOR) {
// The vertex data has the draw color built in, ignore this
continue;
}
break; // can't go any further on this draw call, different render command up next.
} else if (nextcmd->data.draw.count != 2) {
break; // can't go any further on this draw call, those are joined lines
} else if (nextcmd->data.draw.blend != thisblend) {
break; // can't go any further on this draw call, different blendmode copy up next.
} else {
finalcmd = nextcmd; // we can combine copy operations here. Mark this one as the furthest okay command.
// Add the final point in the line
line_start = count;
line_end = line_start + nextcmd->data.draw.count - 1;
if (verts[line_start].x != verts[line_end].x || verts[line_start].y != verts[line_end].y) {
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_POINTLIST, (UINT)(start + line_end), 1);
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_POINTLIST, 1, &verts[line_end], sizeof(Vertex));
}
}
count += nextcmd->data.draw.count;
}
} }
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_LINELIST, (UINT)start, (UINT)(count - 1));
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_LINELIST, (UINT)(count - 1), verts, sizeof(Vertex));
}
cmd = finalcmd; // skip any copy commands we just combined in here.
} }
break; break;
} }
@@ -1427,17 +1455,59 @@ static bool D3D_RunCommandQueue(SDL_Renderer *renderer, SDL_RenderCommand *cmd,
case SDL_RENDERCMD_COPY_EX: // unused case SDL_RENDERCMD_COPY_EX: // unused
break; break;
case SDL_RENDERCMD_DRAW_POINTS:
case SDL_RENDERCMD_GEOMETRY: case SDL_RENDERCMD_GEOMETRY:
{ {
const size_t count = cmd->data.draw.count; /* as long as we have the same copy command in a row, with the
same texture, we can combine them all into a single draw call. */
SDL_Texture *thistexture = cmd->data.draw.texture;
SDL_BlendMode thisblend = cmd->data.draw.blend;
SDL_ScaleMode thisscalemode = cmd->data.draw.texture_scale_mode;
SDL_TextureAddressMode thisaddressmode_u = cmd->data.draw.texture_address_mode_u;
SDL_TextureAddressMode thisaddressmode_v = cmd->data.draw.texture_address_mode_v;
const SDL_RenderCommandType thiscmdtype = cmd->command;
SDL_RenderCommand *finalcmd = cmd;
SDL_RenderCommand *nextcmd;
size_t count = cmd->data.draw.count;
const size_t first = cmd->data.draw.first; const size_t first = cmd->data.draw.first;
SetDrawState(data, cmd); const size_t start = first / sizeof(Vertex);
if (vbo) { const Vertex *verts = (Vertex *)(((Uint8 *)vertices) + first);
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_TRIANGLELIST, (UINT)(first / sizeof(Vertex)), (UINT)count / 3); for (nextcmd = cmd->next; nextcmd; nextcmd = nextcmd->next) {
} else { const SDL_RenderCommandType nextcmdtype = nextcmd->command;
const Vertex *verts = (Vertex *)(((Uint8 *)vertices) + first); if (nextcmdtype != thiscmdtype) {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_TRIANGLELIST, (UINT)count / 3, verts, sizeof(Vertex)); if (nextcmdtype == SDL_RENDERCMD_SETDRAWCOLOR) {
// The vertex data has the draw color built in, ignore this
continue;
}
break; // can't go any further on this draw call, different render command up next.
} else if (nextcmd->data.draw.texture != thistexture ||
nextcmd->data.draw.texture_scale_mode != thisscalemode ||
nextcmd->data.draw.texture_address_mode_u != thisaddressmode_u ||
nextcmd->data.draw.texture_address_mode_v != thisaddressmode_v ||
nextcmd->data.draw.blend != thisblend) {
break; // can't go any further on this draw call, different texture/blendmode copy up next.
} else {
finalcmd = nextcmd; // we can combine copy operations here. Mark this one as the furthest okay command.
count += nextcmd->data.draw.count;
}
} }
SetDrawState(data, cmd);
if (thiscmdtype == SDL_RENDERCMD_GEOMETRY) {
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_TRIANGLELIST, (UINT)start, (UINT)count / 3);
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_TRIANGLELIST, (UINT)count / 3, verts, sizeof(Vertex));
}
} else {
if (vbo) {
IDirect3DDevice9_DrawPrimitive(data->device, D3DPT_POINTLIST, (UINT)start, (UINT)count);
} else {
IDirect3DDevice9_DrawPrimitiveUP(data->device, D3DPT_POINTLIST, (UINT)count, verts, sizeof(Vertex));
}
}
cmd = finalcmd; // skip any copy commands we just combined in here.
break; break;
} }