Function paint_render

src/source.cpp:4341–4365

}

static void paint_render(ID3D11UnorderedAccessView *target_uav, const Shader_Constants_Paint &constants)
{
    ID3D11DeviceContext1 *ctx = G->graphics.device_ctx;
    
    D3D11_MAPPED_SUBRESOURCE mapped;
    ctx->Map(G->graphics.paint_constants_buffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped);
    memcpy(mapped.pData, &constants, sizeof(Shader_Constants_Paint));
    ctx->Unmap(G->graphics.paint_constants_buffer, 0);
    
    ID3D11UnorderedAccessView* uavs[] = { target_uav };
    ctx->CSSetUnorderedAccessViews(0, 1, uavs, nullptr);
    ctx->CSSetConstantBuffers(0, 1, &G->graphics.paint_constants_buffer);
    ctx->CSSetShader(G->graphics.paint_cs_shader, nullptr, 0);
    
    // Dispatch over full canvas (simple, not optimal).
    UINT groups_x = (constants.canvas_size.x + 8 - 1) / 8;
    UINT groups_y = (constants.canvas_size.y + 8 - 1) / 8;
    ctx->Dispatch(groups_x, groups_y, 1);
    
    ID3D11UnorderedAccessView *null_uav[1] = { NULL };
    ID3D11Buffer *null_cb[1] = { NULL };
    ctx->CSSetUnorderedAccessViews(0, 1, null_uav, NULL);
    ctx->CSSetConstantBuffers(0, 1, null_cb);
    ctx->CSSetShader(NULL, NULL, 0);
}

static void paint_update() 
{