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gl_rasterizer: Use the least generic OpenGL draw function possible

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This may help some implementations.
This commit is contained in:
ReinUsesLisp 2020-02-13 21:55:21 -03:00
parent 8b9a56033a
commit 336a4f8e99
1 changed files with 28 additions and 8 deletions
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36
src/video_core/renderer_opengl/gl_rasterizer.cpp
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@ -611,7 +611,7 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
// Setup shaders and their used resources.
texture_cache.GuardSamplers(true);
const auto primitive_mode = MaxwellToGL::PrimitiveTopology(gpu.regs.draw.topology);
const GLenum primitive_mode = MaxwellToGL::PrimitiveTopology(gpu.regs.draw.topology);
SetupShaders(primitive_mode);
texture_cache.GuardSamplers(false);
@ -642,18 +642,38 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
const GLsizei num_instances =
static_cast<GLsizei>(is_instanced ? gpu.mme_draw.instance_count : 1);
if (is_indexed) {
const GLenum index_format = MaxwellToGL::IndexFormat(gpu.regs.index_array.format);
const GLint base_vertex = static_cast<GLint>(gpu.regs.vb_element_base);
const GLsizei num_vertices = static_cast<GLsizei>(gpu.regs.index_array.count);
glDrawElementsInstancedBaseVertexBaseInstance(
primitive_mode, num_vertices, index_format,
reinterpret_cast<const void*>(index_buffer_offset), num_instances, base_vertex,
base_instance);
const GLvoid* offset = reinterpret_cast<const GLvoid*>(index_buffer_offset);
const GLenum format = MaxwellToGL::IndexFormat(gpu.regs.index_array.format);
if (num_instances == 1 && base_instance == 0 && base_vertex == 0) {
glDrawElements(primitive_mode, num_vertices, format, offset);
} else if (num_instances == 1 && base_instance == 0) {
glDrawElementsBaseVertex(primitive_mode, num_vertices, format, offset, base_vertex);
} else if (base_vertex == 0 && base_instance == 0) {
glDrawElementsInstanced(primitive_mode, num_vertices, format, offset, num_instances);
} else if (base_vertex == 0) {
glDrawElementsInstancedBaseInstance(primitive_mode, num_vertices, format, offset,
num_instances, base_instance);
} else if (base_instance == 0) {
glDrawElementsInstancedBaseVertex(primitive_mode, num_vertices, format, offset,
num_instances, base_vertex);
} else {
glDrawElementsInstancedBaseVertexBaseInstance(primitive_mode, num_vertices, format,
offset, num_instances, base_vertex,
base_instance);
}
} else {
const GLint base_vertex = static_cast<GLint>(gpu.regs.vertex_buffer.first);
const GLsizei num_vertices = static_cast<GLsizei>(gpu.regs.vertex_buffer.count);
glDrawArraysInstancedBaseInstance(primitive_mode, base_vertex, num_vertices, num_instances,
base_instance);
if (num_instances == 1 && base_instance == 0) {
glDrawArrays(primitive_mode, base_vertex, num_vertices);
} else if (base_instance == 0) {
glDrawArraysInstanced(primitive_mode, base_vertex, num_vertices, num_instances);
} else {
glDrawArraysInstancedBaseInstance(primitive_mode, base_vertex, num_vertices,
num_instances, base_instance);
}
}
}