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gs-vertexbuffer: Allow specifying amount of UV layers

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This should reduce GPU memory usage for vertex buffers that need less UV information than the maximum allowed UV layers possible.
This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2018-09-27 02:57:53 +02:00
parent c3e67bad97
commit cace17a817
2 changed files with 31 additions and 16 deletions
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35
source/gs-vertexbuffer.cpp
View file

@ -70,16 +70,19 @@ gs::vertex_buffer::~vertex_buffer()
}
}
// cppcheck-suppress uninitMemberVar
gs::vertex_buffer::vertex_buffer() : vertex_buffer(MAXIMUM_VERTICES) {}
gs::vertex_buffer::vertex_buffer() : vertex_buffer(MAXIMUM_VERTICES, MAXIMUM_UVW_LAYERS) {}
gs::vertex_buffer::vertex_buffer(uint32_t maximumVertices)
: m_size(maximumVertices), m_capacity(maximumVertices), m_layers(MAXIMUM_UVW_LAYERS), m_positions(nullptr),
m_normals(nullptr), m_tangents(nullptr), m_colors(nullptr), m_vertexbufferdata(nullptr), m_vertexbuffer(nullptr),
m_layerdata(nullptr)
gs::vertex_buffer::vertex_buffer(uint32_t vertices) : vertex_buffer(vertices, MAXIMUM_UVW_LAYERS) {}
gs::vertex_buffer::vertex_buffer(uint32_t vertices, uint8_t uvlayers)
: m_size(vertices), m_capacity(vertices), m_layers(uvlayers), m_positions(nullptr), m_normals(nullptr),
m_tangents(nullptr), m_colors(nullptr), m_vertexbufferdata(nullptr), m_vertexbuffer(nullptr), m_layerdata(nullptr)
{
if (maximumVertices > MAXIMUM_VERTICES) {
throw std::out_of_range("maximumVertices out of range");
if (vertices > MAXIMUM_VERTICES) {
throw std::out_of_range("vertices out of range");
}
if (uvlayers > MAXIMUM_UVW_LAYERS) {
throw std::out_of_range("uvlayers out of range");
}
// Allocate memory for data.
@ -99,12 +102,16 @@ gs::vertex_buffer::vertex_buffer(uint32_t maximumVertices)
std::memset(m_colors, 0, sizeof(uint32_t) * m_capacity);
m_vertexbufferdata->num_tex = m_layers;
m_vertexbufferdata->tvarray = m_layerdata =
(gs_tvertarray*)util::malloc_aligned(16, sizeof(gs_tvertarray) * m_layers);
for (size_t n = 0; n < MAXIMUM_UVW_LAYERS; n++) {
m_layerdata[n].array = m_uvs[n] = (vec4*)util::malloc_aligned(16, sizeof(vec4) * m_capacity);
m_layerdata[n].width = 4;
std::memset(m_uvs[n], 0, sizeof(vec4) * m_capacity);
if (m_layers > 0) {
m_vertexbufferdata->tvarray = m_layerdata =
(gs_tvertarray*)util::malloc_aligned(16, sizeof(gs_tvertarray) * m_layers);
for (size_t n = 0; n < MAXIMUM_UVW_LAYERS; n++) {
m_layerdata[n].array = m_uvs[n] = (vec4*)util::malloc_aligned(16, sizeof(vec4) * m_capacity);
m_layerdata[n].width = 4;
std::memset(m_uvs[n], 0, sizeof(vec4) * m_capacity);
}
} else {
m_vertexbufferdata->tvarray = nullptr;
}
// Allocate GPU

12
source/gs-vertexbuffer.h
View file

@ -45,9 +45,17 @@ namespace gs {
/*!
* \brief Create a Vertex Buffer with a specific number of Vertices.
*
* \param maximumVertices Maximum amount of vertices to store.
* \param vertices Number of vertices to store.
*/
vertex_buffer(uint32_t maximumVertices);
vertex_buffer(uint32_t vertices);
/*!
* \brief Create a Vertex Buffer with a specific number of Vertices and uv layers.
*
* \param vertices Number of vertices to store.
* \param layers Number of uv layers to store.
*/
vertex_buffer(uint32_t vertices, uint8_t layers);
/*!
* \brief Create a copy of a Vertex Buffer