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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <fstream>
#include <memory>
#include <string>
#include <vector>
#include "Common/CommonTypes.h"
#include "Common/FileUtil.h"
#include "Common/GL/GLExtensions/GLExtensions.h"
#include "Common/GL/GLInterfaceBase.h"
#include "Common/StringUtil.h"
#include "VideoBackends/OGL/ProgramShaderCache.h"
#include "VideoBackends/OGL/Render.h"
#include "VideoBackends/OGL/StreamBuffer.h"
#include "VideoBackends/OGL/VertexManager.h"
#include "VideoCommon/BPMemory.h"
#include "VideoCommon/IndexGenerator.h"
#include "VideoCommon/Statistics.h"
#include "VideoCommon/VertexLoaderManager.h"
#include "VideoCommon/VideoConfig.h"
namespace OGL
{
// This are the initially requested size for the buffers expressed in bytes
const u32 MAX_IBUFFER_SIZE = 2 * 1024 * 1024;
const u32 MAX_VBUFFER_SIZE = 32 * 1024 * 1024;
static std::unique_ptr<StreamBuffer> s_vertexBuffer;
static std::unique_ptr<StreamBuffer> s_indexBuffer;
static size_t s_baseVertex;
static size_t s_index_offset;
VertexManager::VertexManager() : m_cpu_v_buffer(MAX_VBUFFER_SIZE), m_cpu_i_buffer(MAX_IBUFFER_SIZE)
{
CreateDeviceObjects();
}
VertexManager::~VertexManager()
{
DestroyDeviceObjects();
}
void VertexManager::CreateDeviceObjects()
{
s_vertexBuffer = StreamBuffer::Create(GL_ARRAY_BUFFER, MAX_VBUFFER_SIZE);
m_vertex_buffers = s_vertexBuffer->m_buffer;
s_indexBuffer = StreamBuffer::Create(GL_ELEMENT_ARRAY_BUFFER, MAX_IBUFFER_SIZE);
m_index_buffers = s_indexBuffer->m_buffer;
m_last_vao = 0;
}
void VertexManager::DestroyDeviceObjects()
{
s_vertexBuffer.reset();
s_indexBuffer.reset();
}
void VertexManager::PrepareDrawBuffers(u32 stride)
{
u32 vertex_data_size = IndexGenerator::GetNumVerts() * stride;
u32 index_data_size = IndexGenerator::GetIndexLen() * sizeof(u16);
s_vertexBuffer->Unmap(vertex_data_size);
s_indexBuffer->Unmap(index_data_size);
ADDSTAT(stats.thisFrame.bytesVertexStreamed, vertex_data_size);
ADDSTAT(stats.thisFrame.bytesIndexStreamed, index_data_size);
}
void VertexManager::ResetBuffer(u32 stride)
{
if (m_cull_all)
{
// This buffer isn't getting sent to the GPU. Just allocate it on the cpu.
m_cur_buffer_pointer = m_base_buffer_pointer = m_cpu_v_buffer.data();
m_end_buffer_pointer = m_base_buffer_pointer + m_cpu_v_buffer.size();
IndexGenerator::Start((u16*)m_cpu_i_buffer.data());
}
else
{
auto buffer = s_vertexBuffer->Map(MAXVBUFFERSIZE, stride);
m_cur_buffer_pointer = m_base_buffer_pointer = buffer.first;
m_end_buffer_pointer = buffer.first + MAXVBUFFERSIZE;
s_baseVertex = buffer.second / stride;
buffer = s_indexBuffer->Map(MAXIBUFFERSIZE * sizeof(u16));
IndexGenerator::Start((u16*)buffer.first);
s_index_offset = buffer.second;
}
}
void VertexManager::Draw(u32 stride)
{
u32 index_size = IndexGenerator::GetIndexLen();
u32 max_index = IndexGenerator::GetNumVerts();
GLenum primitive_mode = 0;
switch (m_current_primitive_type)
{
case PRIMITIVE_POINTS:
primitive_mode = GL_POINTS;
glDisable(GL_CULL_FACE);
break;
case PRIMITIVE_LINES:
primitive_mode = GL_LINES;
glDisable(GL_CULL_FACE);
break;
case PRIMITIVE_TRIANGLES:
primitive_mode =
g_ActiveConfig.backend_info.bSupportsPrimitiveRestart ? GL_TRIANGLE_STRIP : GL_TRIANGLES;
break;
}
if (g_ogl_config.bSupportsGLBaseVertex)
{
glDrawRangeElementsBaseVertex(primitive_mode, 0, max_index, index_size, GL_UNSIGNED_SHORT,
(u8*)nullptr + s_index_offset, (GLint)s_baseVertex);
}
else
{
glDrawRangeElements(primitive_mode, 0, max_index, index_size, GL_UNSIGNED_SHORT,
(u8*)nullptr + s_index_offset);
}
INCSTAT(stats.thisFrame.numDrawCalls);
if (m_current_primitive_type != PRIMITIVE_TRIANGLES)
static_cast<Renderer*>(g_renderer.get())->SetGenerationMode();
}
void VertexManager::vFlush(bool useDstAlpha)
{
GLVertexFormat* nativeVertexFmt = (GLVertexFormat*)VertexLoaderManager::GetCurrentVertexFormat();
u32 stride = nativeVertexFmt->GetVertexStride();
if (m_last_vao != nativeVertexFmt->VAO)
{
glBindVertexArray(nativeVertexFmt->VAO);
m_last_vao = nativeVertexFmt->VAO;
}
PrepareDrawBuffers(stride);
// Makes sure we can actually do Dual source blending
bool dualSourcePossible = g_ActiveConfig.backend_info.bSupportsDualSourceBlend;
// If host supports GL_ARB_blend_func_extended, we can do dst alpha in
// the same pass as regular rendering.
if (useDstAlpha && dualSourcePossible)
{
ProgramShaderCache::SetShader(DSTALPHA_DUAL_SOURCE_BLEND, m_current_primitive_type);
}
else
{
ProgramShaderCache::SetShader(DSTALPHA_NONE, m_current_primitive_type);
}
// upload global constants
ProgramShaderCache::UploadConstants();
// setup the pointers
nativeVertexFmt->SetupVertexPointers();
Draw(stride);
// If the GPU does not support dual-source blending, we can approximate the effect by drawing
// the object a second time, with the write mask set to alpha only using a shader that outputs
// the destination/constant alpha value (which would normally be SRC_COLOR.a).
//
// This is also used when logic ops and destination alpha is enabled, since we can't enable
// blending and logic ops concurrently.
bool logic_op_enabled = (bpmem.blendmode.logicopenable && !bpmem.blendmode.blendenable &&
GLInterface->GetMode() == GLInterfaceMode::MODE_OPENGL);
if (useDstAlpha && (!dualSourcePossible || logic_op_enabled))
{
ProgramShaderCache::SetShader(DSTALPHA_ALPHA_PASS, m_current_primitive_type);
// only update alpha
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
glDisable(GL_BLEND);
if (logic_op_enabled)
glDisable(GL_COLOR_LOGIC_OP);
Draw(stride);
// restore color mask
g_renderer->SetColorMask();
if (bpmem.blendmode.blendenable || bpmem.blendmode.subtract)
glEnable(GL_BLEND);
if (logic_op_enabled)
glEnable(GL_COLOR_LOGIC_OP);
}
#if defined(_DEBUG) || defined(DEBUGFAST)
if (g_ActiveConfig.iLog & CONF_SAVESHADERS)
{
// save the shaders
ProgramShaderCache::PCacheEntry prog = ProgramShaderCache::GetShaderProgram();
std::string filename = StringFromFormat(
"%sps%.3d.txt", File::GetUserPath(D_DUMPFRAMES_IDX).c_str(), g_ActiveConfig.iSaveTargetId);
std::ofstream fps;
OpenFStream(fps, filename, std::ios_base::out);
fps << prog.shader.strpprog;
filename = StringFromFormat("%svs%.3d.txt", File::GetUserPath(D_DUMPFRAMES_IDX).c_str(),
g_ActiveConfig.iSaveTargetId);
std::ofstream fvs;
OpenFStream(fvs, filename, std::ios_base::out);
fvs << prog.shader.strvprog;
}
if (g_ActiveConfig.iLog & CONF_SAVETARGETS)
{
std::string filename =
StringFromFormat("%starg%.3d.png", File::GetUserPath(D_DUMPFRAMES_IDX).c_str(),
g_ActiveConfig.iSaveTargetId);
TargetRectangle tr;
tr.left = 0;
tr.right = Renderer::GetTargetWidth();
tr.top = 0;
tr.bottom = Renderer::GetTargetHeight();
g_renderer->SaveScreenshot(filename, tr);
}
#endif
g_Config.iSaveTargetId++;
ClearEFBCache();
}
} // namespace
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