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gl_rasterizer: Fix buffers without size 

On NVN buffers can be enabled but have no size. According to deko3d and
the behavior we see in Animal Crossing: New Horizons these buffers get
the special address of 0x1000 and limit themselves to 0xfff.

Implement buffers without a size by binding a null buffer to OpenGL
without a side.

1d1930beea/source/maxwell/gpu_3d_vbo.cpp (L62-L63)
merge-requests/60/head
ReinUsesLisp 2020-04-19 01:25:52 +07:00
parent f293b15611
commit 0bbae63300
3 changed files with 13 additions and 8 deletions
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3
src/video_core/engines/maxwell_3d.h
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@ -1259,7 +1259,8 @@ public:
GPUVAddr LimitAddress() const {
return static_cast<GPUVAddr>((static_cast<GPUVAddr>(limit_high) << 32) |
limit_low);
limit_low) +
1;
}
} vertex_array_limit[NumVertexArrays];

12
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -185,8 +185,12 @@ void RasterizerOpenGL::SetupVertexBuffer() {
const GPUVAddr start = vertex_array.StartAddress();
const GPUVAddr end = regs.vertex_array_limit[index].LimitAddress();
ASSERT(end > start);
const u64 size = end - start + 1;
ASSERT(end >= start);
const u64 size = end - start;
if (size == 0) {
glBindVertexBuffer(static_cast<GLuint>(index), 0, 0, vertex_array.stride);
continue;
}
const auto [vertex_buffer, vertex_buffer_offset] = buffer_cache.UploadMemory(start, size);
glBindVertexBuffer(static_cast<GLuint>(index), vertex_buffer, vertex_buffer_offset,
vertex_array.stride);
@ -310,8 +314,8 @@ std::size_t RasterizerOpenGL::CalculateVertexArraysSize() const {
const GPUVAddr start = regs.vertex_array[index].StartAddress();
const GPUVAddr end = regs.vertex_array_limit[index].LimitAddress();
ASSERT(end > start);
size += end - start + 1;
size += end - start;
ASSERT(end >= start);
}
return size;

6
src/video_core/renderer_vulkan/vk_rasterizer.cpp
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@ -834,8 +834,8 @@ void RasterizerVulkan::SetupVertexArrays(FixedPipelineState::VertexInput& vertex
const GPUVAddr start{vertex_array.StartAddress()};
const GPUVAddr end{regs.vertex_array_limit[index].LimitAddress()};
ASSERT(end > start);
const std::size_t size{end - start + 1};
ASSERT(end >= start);
const std::size_t size{end - start};
const auto [buffer, offset] = buffer_cache.UploadMemory(start, size);
buffer_bindings.AddVertexBinding(buffer, offset);
}
@ -1179,7 +1179,7 @@ std::size_t RasterizerVulkan::CalculateVertexArraysSize() const {
const GPUVAddr end{regs.vertex_array_limit[index].LimitAddress()};
DEBUG_ASSERT(end >= start);
size += (end - start + 1) * regs.vertex_array[index].enable;
size += (end - start) * regs.vertex_array[index].enable;
}
return size;
}