forked from dolphin-emu/dolphin
440 lines
13 KiB
C++
440 lines
13 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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// Fast image conversion using OpenGL shaders.
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// This kind of stuff would be a LOT nicer with OpenCL.
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#include "TextureConverter.h"
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#include "TextureConversionShader.h"
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#include "TextureCache.h"
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#include "ProgramShaderCache.h"
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#include "VertexShaderManager.h"
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#include "FramebufferManager.h"
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#include "Globals.h"
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#include "VideoConfig.h"
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#include "ImageWrite.h"
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#include "Render.h"
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#include "FileUtil.h"
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#include "HW/Memmap.h"
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#include "DriverDetails.h"
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namespace OGL
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{
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namespace TextureConverter
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{
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using OGL::TextureCache;
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static GLuint s_texConvFrameBuffer = 0;
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static GLuint s_srcTexture = 0; // for decoding from RAM
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static GLuint s_srcTextureWidth = 0;
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static GLuint s_srcTextureHeight = 0;
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static GLuint s_dstTexture = 0; // for encoding to RAM
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const int renderBufferWidth = 1024;
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const int renderBufferHeight = 1024;
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static SHADER s_rgbToYuyvProgram;
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static SHADER s_yuyvToRgbProgram;
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// Not all slots are taken - but who cares.
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const u32 NUM_ENCODING_PROGRAMS = 64;
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static SHADER s_encodingPrograms[NUM_ENCODING_PROGRAMS];
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static GLuint s_encode_VBO = 0;
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static GLuint s_encode_VAO = 0;
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static GLuint s_decode_VBO = 0;
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static GLuint s_decode_VAO = 0;
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static TargetRectangle s_cached_sourceRc;
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static int s_cached_srcWidth = 0;
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static int s_cached_srcHeight = 0;
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static const char *VProgram =
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"ATTRIN vec2 rawpos;\n"
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"ATTRIN vec2 tex0;\n"
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"VARYOUT vec2 uv0;\n"
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"void main()\n"
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"{\n"
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" uv0 = tex0;\n"
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" gl_Position = vec4(rawpos, 0.0, 1.0);\n"
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"}\n";
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void CreatePrograms()
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{
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// Output is BGRA because that is slightly faster than RGBA.
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const char *FProgramRgbToYuyv =
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"uniform sampler2DRect samp9;\n"
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"VARYIN vec2 uv0;\n"
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"COLOROUT(ocol0)\n"
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"void main()\n"
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"{\n"
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" vec3 c0 = texture2DRect(samp9, uv0).rgb;\n"
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" vec3 c1 = texture2DRect(samp9, uv0 + vec2(1.0, 0.0)).rgb;\n"
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" vec3 c01 = (c0 + c1) * 0.5;\n"
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" vec3 y_const = vec3(0.257,0.504,0.098);\n"
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" vec3 u_const = vec3(-0.148,-0.291,0.439);\n"
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" vec3 v_const = vec3(0.439,-0.368,-0.071);\n"
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" vec4 const3 = vec4(0.0625,0.5,0.0625,0.5);\n"
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" ocol0 = vec4(dot(c1,y_const),dot(c01,u_const),dot(c0,y_const),dot(c01, v_const)) + const3;\n"
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"}\n";
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const char *FProgramYuyvToRgb =
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"uniform sampler2DRect samp9;\n"
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"VARYIN vec2 uv0;\n"
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"COLOROUT(ocol0)\n"
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"void main()\n"
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"{\n"
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" vec4 c0 = texture2DRect(samp9, uv0).rgba;\n"
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" float f = step(0.5, fract(uv0.x));\n"
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" float y = mix(c0.b, c0.r, f);\n"
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" float yComp = 1.164 * (y - 0.0625);\n"
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" float uComp = c0.g - 0.5;\n"
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" float vComp = c0.a - 0.5;\n"
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" ocol0 = vec4(yComp + (1.596 * vComp),\n"
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" yComp - (0.813 * vComp) - (0.391 * uComp),\n"
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" yComp + (2.018 * uComp),\n"
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" 1.0);\n"
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"}\n";
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ProgramShaderCache::CompileShader(s_rgbToYuyvProgram, VProgram, FProgramRgbToYuyv);
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ProgramShaderCache::CompileShader(s_yuyvToRgbProgram, VProgram, FProgramYuyvToRgb);
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}
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SHADER &GetOrCreateEncodingShader(u32 format)
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{
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if (format > NUM_ENCODING_PROGRAMS)
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{
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PanicAlert("Unknown texture copy format: 0x%x\n", format);
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return s_encodingPrograms[0];
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}
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if (s_encodingPrograms[format].glprogid == 0)
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{
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const char* shader = TextureConversionShader::GenerateEncodingShader(format, API_OPENGL);
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#if defined(_DEBUG) || defined(DEBUGFAST)
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if (g_ActiveConfig.iLog & CONF_SAVESHADERS && shader)
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{
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static int counter = 0;
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char szTemp[MAX_PATH];
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sprintf(szTemp, "%senc_%04i.txt", File::GetUserPath(D_DUMP_IDX).c_str(), counter++);
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SaveData(szTemp, shader);
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}
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#endif
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ProgramShaderCache::CompileShader(s_encodingPrograms[format], VProgram, shader);
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}
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return s_encodingPrograms[format];
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}
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void Init()
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{
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glGenFramebuffers(1, &s_texConvFrameBuffer);
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glGenBuffers(1, &s_encode_VBO );
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glGenVertexArrays(1, &s_encode_VAO );
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glBindBuffer(GL_ARRAY_BUFFER, s_encode_VBO );
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glBindVertexArray( s_encode_VAO );
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glEnableVertexAttribArray(SHADER_POSITION_ATTRIB);
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glVertexAttribPointer(SHADER_POSITION_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL);
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glEnableVertexAttribArray(SHADER_TEXTURE0_ATTRIB);
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glVertexAttribPointer(SHADER_TEXTURE0_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL+2);
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s_cached_sourceRc.top = -1;
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s_cached_sourceRc.bottom = -1;
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s_cached_sourceRc.left = -1;
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s_cached_sourceRc.right = -1;
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glGenBuffers(1, &s_decode_VBO );
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glGenVertexArrays(1, &s_decode_VAO );
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glBindBuffer(GL_ARRAY_BUFFER, s_decode_VBO );
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glBindVertexArray( s_decode_VAO );
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s_cached_srcWidth = -1;
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s_cached_srcHeight = -1;
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glEnableVertexAttribArray(SHADER_POSITION_ATTRIB);
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glVertexAttribPointer(SHADER_POSITION_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL);
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glEnableVertexAttribArray(SHADER_TEXTURE0_ATTRIB);
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glVertexAttribPointer(SHADER_TEXTURE0_ATTRIB, 2, GL_FLOAT, 0, sizeof(GLfloat)*4, (GLfloat*)NULL+2);
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s_srcTextureWidth = 0;
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s_srcTextureHeight = 0;
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glActiveTexture(GL_TEXTURE0 + 9);
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glGenTextures(1, &s_srcTexture);
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glBindTexture(getFbType(), s_srcTexture);
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glTexParameteri(getFbType(), GL_TEXTURE_MAX_LEVEL, 0);
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glGenTextures(1, &s_dstTexture);
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glBindTexture(GL_TEXTURE_2D, s_dstTexture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, renderBufferWidth, renderBufferHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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CreatePrograms();
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}
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void Shutdown()
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{
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glDeleteTextures(1, &s_srcTexture);
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glDeleteTextures(1, &s_dstTexture);
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glDeleteFramebuffers(1, &s_texConvFrameBuffer);
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glDeleteBuffers(1, &s_encode_VBO );
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glDeleteVertexArrays(1, &s_encode_VAO );
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glDeleteBuffers(1, &s_decode_VBO );
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glDeleteVertexArrays(1, &s_decode_VAO );
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s_rgbToYuyvProgram.Destroy();
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s_yuyvToRgbProgram.Destroy();
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for (unsigned int i = 0; i < NUM_ENCODING_PROGRAMS; i++)
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s_encodingPrograms[i].Destroy();
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s_srcTexture = 0;
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s_dstTexture = 0;
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s_texConvFrameBuffer = 0;
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}
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void EncodeToRamUsingShader(GLuint srcTexture, const TargetRectangle& sourceRc,
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u8* destAddr, int dstWidth, int dstHeight, int readStride,
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bool toTexture, bool linearFilter)
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{
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// switch to texture converter frame buffer
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// attach render buffer as color destination
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FramebufferManager::SetFramebuffer(s_texConvFrameBuffer);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, s_dstTexture, 0);
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GL_REPORT_ERRORD();
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// set source texture
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glActiveTexture(GL_TEXTURE0+9);
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glBindTexture(getFbType(), srcTexture);
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if (linearFilter)
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{
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glTexParameteri(getFbType(), GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(getFbType(), GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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}
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else
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{
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glTexParameteri(getFbType(), GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glTexParameteri(getFbType(), GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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}
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GL_REPORT_ERRORD();
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glViewport(0, 0, (GLsizei)dstWidth, (GLsizei)dstHeight);
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GL_REPORT_ERRORD();
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if(!(s_cached_sourceRc == sourceRc)) {
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GLfloat vertices[] = {
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-1.f, -1.f,
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(float)sourceRc.left, (float)sourceRc.top,
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-1.f, 1.f,
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(float)sourceRc.left, (float)sourceRc.bottom,
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1.f, -1.f,
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(float)sourceRc.right, (float)sourceRc.top,
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1.f, 1.f,
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(float)sourceRc.right, (float)sourceRc.bottom
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};
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glBindBuffer(GL_ARRAY_BUFFER, s_encode_VBO );
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glBufferData(GL_ARRAY_BUFFER, 4*4*sizeof(GLfloat), vertices, GL_STREAM_DRAW);
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s_cached_sourceRc = sourceRc;
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}
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glBindVertexArray( s_encode_VAO );
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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GL_REPORT_ERRORD();
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// .. and then read back the results.
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// TODO: make this less slow.
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int writeStride = bpmem.copyMipMapStrideChannels * 32;
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if (writeStride != readStride && toTexture)
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{
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// writing to a texture of a different size
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int readHeight = readStride / dstWidth;
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readHeight /= 4; // 4 bytes per pixel
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int readStart = 0;
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int readLoops = dstHeight / readHeight;
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for (int i = 0; i < readLoops; i++)
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{
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glReadPixels(0, readStart, (GLsizei)dstWidth, (GLsizei)readHeight, GL_BGRA, GL_UNSIGNED_BYTE, destAddr);
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readStart += readHeight;
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destAddr += writeStride;
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}
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}
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else
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glReadPixels(0, 0, (GLsizei)dstWidth, (GLsizei)dstHeight, GL_BGRA, GL_UNSIGNED_BYTE, destAddr);
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GL_REPORT_ERRORD();
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}
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int EncodeToRamFromTexture(u32 address,GLuint source_texture, bool bFromZBuffer, bool bIsIntensityFmt, u32 copyfmt, int bScaleByHalf, const EFBRectangle& source)
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{
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u32 format = copyfmt;
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if (bFromZBuffer)
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{
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format |= _GX_TF_ZTF;
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if (copyfmt == 11)
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format = GX_TF_Z16;
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else if (format < GX_TF_Z8 || format > GX_TF_Z24X8)
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format |= _GX_TF_CTF;
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}
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else
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if (copyfmt > GX_TF_RGBA8 || (copyfmt < GX_TF_RGB565 && !bIsIntensityFmt))
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format |= _GX_TF_CTF;
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SHADER& texconv_shader = GetOrCreateEncodingShader(format);
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u8 *dest_ptr = Memory::GetPointer(address);
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int width = (source.right - source.left) >> bScaleByHalf;
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int height = (source.bottom - source.top) >> bScaleByHalf;
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int size_in_bytes = TexDecoder_GetTextureSizeInBytes(width, height, format);
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u16 blkW = TexDecoder_GetBlockWidthInTexels(format) - 1;
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u16 blkH = TexDecoder_GetBlockHeightInTexels(format) - 1;
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u16 samples = TextureConversionShader::GetEncodedSampleCount(format);
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// only copy on cache line boundaries
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// extra pixels are copied but not displayed in the resulting texture
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s32 expandedWidth = (width + blkW) & (~blkW);
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s32 expandedHeight = (height + blkH) & (~blkH);
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float sampleStride = bScaleByHalf ? 2.f : 1.f;
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float params[] = {
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Renderer::EFBToScaledXf(sampleStride), Renderer::EFBToScaledYf(sampleStride),
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0.0f, 0.0f,
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(float)expandedWidth, (float)Renderer::EFBToScaledY(expandedHeight)-1,
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(float)Renderer::EFBToScaledX(source.left), (float)Renderer::EFBToScaledY(EFB_HEIGHT - source.top - expandedHeight)
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};
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texconv_shader.Bind();
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glUniform4fv(texconv_shader.UniformLocations[0], 2, params);
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TargetRectangle scaledSource;
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scaledSource.top = 0;
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scaledSource.bottom = expandedHeight;
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scaledSource.left = 0;
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scaledSource.right = expandedWidth / samples;
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int cacheBytes = 32;
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if ((format & 0x0f) == 6)
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cacheBytes = 64;
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int readStride = (expandedWidth * cacheBytes) /
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TexDecoder_GetBlockWidthInTexels(format);
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EncodeToRamUsingShader(source_texture, scaledSource,
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dest_ptr, expandedWidth / samples, expandedHeight, readStride,
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true, bScaleByHalf > 0 && !bFromZBuffer);
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return size_in_bytes; // TODO: D3D11 is calculating this value differently!
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}
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void EncodeToRamYUYV(GLuint srcTexture, const TargetRectangle& sourceRc, u8* destAddr, int dstWidth, int dstHeight)
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{
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g_renderer->ResetAPIState();
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s_rgbToYuyvProgram.Bind();
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EncodeToRamUsingShader(srcTexture, sourceRc, destAddr, dstWidth / 2, dstHeight, 0, false, false);
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FramebufferManager::SetFramebuffer(0);
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VertexShaderManager::SetViewportChanged();
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TextureCache::DisableStage(0);
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g_renderer->RestoreAPIState();
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GL_REPORT_ERRORD();
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}
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// Should be scale free.
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void DecodeToTexture(u32 xfbAddr, int srcWidth, int srcHeight, GLuint destTexture)
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{
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u8* srcAddr = Memory::GetPointer(xfbAddr);
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if (!srcAddr)
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{
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WARN_LOG(VIDEO, "Tried to decode from invalid memory address");
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return;
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}
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int srcFmtWidth = srcWidth / 2;
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g_renderer->ResetAPIState(); // reset any game specific settings
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// switch to texture converter frame buffer
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// attach destTexture as color destination
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FramebufferManager::SetFramebuffer(s_texConvFrameBuffer);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, destTexture, 0);
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GL_REPORT_FBO_ERROR();
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// activate source texture
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// set srcAddr as data for source texture
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glActiveTexture(GL_TEXTURE0+9);
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glBindTexture(getFbType(), s_srcTexture);
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// TODO: make this less slow. (How?)
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if ((GLsizei)s_srcTextureWidth == (GLsizei)srcFmtWidth && (GLsizei)s_srcTextureHeight == (GLsizei)srcHeight)
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{
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glTexSubImage2D(getFbType(), 0,0,0,s_srcTextureWidth, s_srcTextureHeight,
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GL_BGRA, GL_UNSIGNED_BYTE, srcAddr);
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}
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else
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{
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glTexImage2D(getFbType(), 0, GL_RGBA, (GLsizei)srcFmtWidth, (GLsizei)srcHeight,
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0, GL_BGRA, GL_UNSIGNED_BYTE, srcAddr);
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s_srcTextureWidth = (GLsizei)srcFmtWidth;
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s_srcTextureHeight = (GLsizei)srcHeight;
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}
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glViewport(0, 0, srcWidth, srcHeight);
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s_yuyvToRgbProgram.Bind();
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GL_REPORT_ERRORD();
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if(s_cached_srcHeight != srcHeight || s_cached_srcWidth != srcWidth) {
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GLfloat vertices[] = {
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1.f, -1.f,
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(float)srcFmtWidth, (float)srcHeight,
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1.f, 1.f,
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(float)srcFmtWidth, 0.f,
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-1.f, -1.f,
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0.f, (float)srcHeight,
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-1.f, 1.f,
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0.f, 0.f
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};
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glBindBuffer(GL_ARRAY_BUFFER, s_decode_VBO );
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glBufferData(GL_ARRAY_BUFFER, sizeof(GLfloat)*4*4, vertices, GL_STREAM_DRAW);
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s_cached_srcHeight = srcHeight;
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s_cached_srcWidth = srcWidth;
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}
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glBindVertexArray( s_decode_VAO );
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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GL_REPORT_ERRORD();
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VertexShaderManager::SetViewportChanged();
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FramebufferManager::SetFramebuffer(0);
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g_renderer->RestoreAPIState();
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GL_REPORT_ERRORD();
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}
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} // namespace
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} // namespace OGL
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