Add OpenGL shader support. (patch by ny00123 and refined by jmarsh). Add several builtin ones that mimic the scalers and some extra. Thanks jmarsh
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4319
This commit is contained in:
Peter Veenstra
parent
62ab91a269
commit
4a565a75ed
7 changed files with 1021 additions and 30 deletions
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@ -49,6 +49,7 @@
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#include "cpu.h"
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#include "cross.h"
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#include "control.h"
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#include "render.h"
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#define MAPPERFILE "mapper-" VERSION ".map"
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//#define DISABLE_JOYSTICK
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@ -92,6 +93,53 @@ PFNGLBUFFERDATAARBPROC glBufferDataARB = NULL;
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PFNGLMAPBUFFERARBPROC glMapBufferARB = NULL;
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PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB = NULL;
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#ifndef GL_VERSION_2_0
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#define GL_VERSION_2_0 1
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typedef void (APIENTRYP PFNGLATTACHSHADERPROC) (GLuint program, GLuint shader);
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typedef void (APIENTRYP PFNGLCOMPILESHADERPROC) (GLuint shader);
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typedef GLuint (APIENTRYP PFNGLCREATEPROGRAMPROC) (void);
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typedef GLuint (APIENTRYP PFNGLCREATESHADERPROC) (GLenum type);
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typedef void (APIENTRYP PFNGLDELETEPROGRAMPROC) (GLuint program);
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typedef void (APIENTRYP PFNGLDELETESHADERPROC) (GLuint shader);
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typedef void (APIENTRYP PFNGLENABLEVERTEXATTRIBARRAYPROC) (GLuint index);
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typedef GLint (APIENTRYP PFNGLGETATTRIBLOCATIONPROC) (GLuint program, const GLchar *name);
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typedef void (APIENTRYP PFNGLGETPROGRAMIVPROC) (GLuint program, GLenum pname, GLint *params);
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typedef void (APIENTRYP PFNGLGETPROGRAMINFOLOGPROC) (GLuint program, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
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typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLint *params);
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typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
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typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
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typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
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typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar *const*string, const GLint *length);
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typedef void (APIENTRYP PFNGLUNIFORM2FPROC) (GLint location, GLfloat v0, GLfloat v1);
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typedef void (APIENTRYP PFNGLUNIFORM1IPROC) (GLint location, GLint v0);
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typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
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typedef void (APIENTRYP PFNGLVERTEXATTRIBPOINTERPROC) (GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid *pointer);
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#endif
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PFNGLATTACHSHADERPROC glAttachShader = NULL;
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PFNGLCOMPILESHADERPROC glCompileShader = NULL;
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PFNGLCREATEPROGRAMPROC glCreateProgram = NULL;
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PFNGLCREATESHADERPROC glCreateShader = NULL;
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PFNGLDELETEPROGRAMPROC glDeleteProgram = NULL;
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PFNGLDELETESHADERPROC glDeleteShader = NULL;
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PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray = NULL;
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PFNGLGETATTRIBLOCATIONPROC glGetAttribLocation = NULL;
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PFNGLGETPROGRAMIVPROC glGetProgramiv = NULL;
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PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog = NULL;
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PFNGLGETSHADERIVPROC glGetShaderiv = NULL;
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PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog = NULL;
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PFNGLGETUNIFORMLOCATIONPROC glGetUniformLocation = NULL;
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PFNGLLINKPROGRAMPROC glLinkProgram = NULL;
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PFNGLSHADERSOURCEPROC glShaderSource = NULL;
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PFNGLUNIFORM2FPROC glUniform2f = NULL;
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PFNGLUNIFORM1IPROC glUniform1i = NULL;
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PFNGLUSEPROGRAMPROC glUseProgram = NULL;
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PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer = NULL;
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#ifndef GL_SHADER_COMPILER
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#define GL_SHADER_COMPILER 0x8DFA
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#endif
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#endif //C_OPENGL
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#if !(ENVIRON_INCLUDED)
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@ -190,6 +238,18 @@ struct SDL_Block {
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bool packed_pixel;
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bool paletted_texture;
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bool pixel_buffer_object;
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bool use_shader;
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GLuint program_object;
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const char *shader_src;
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struct {
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GLint texture_size;
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GLint input_size;
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GLint output_size;
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GLint frame_count;
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} ruby;
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GLuint actual_frame_count;
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GLfloat vertex_data[2*3];
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} opengl;
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#endif
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struct {
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@ -229,6 +289,23 @@ struct SDL_Block {
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static SDL_Block sdl;
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#if C_OPENGL
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static char const shader_src_default[] =
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"varying vec2 v_texCoord;\n"
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"#if defined(VERTEX)\n"
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"uniform vec2 rubyTextureSize;\n"
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"uniform vec2 rubyInputSize;\n"
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"attribute vec4 a_position;\n"
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"void main() {\n"
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" gl_Position = a_position;\n"
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" v_texCoord = vec2(a_position.x+1.0,1.0-a_position.y)/2.0*rubyInputSize/rubyTextureSize;\n"
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"}\n"
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"#elif defined(FRAGMENT)\n"
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"uniform sampler2D rubyTexture;\n\n"
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"void main() {\n"
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" gl_FragColor = texture2D(rubyTexture, v_texCoord);\n"
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"}\n"
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"#endif\n";
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#ifdef DB_OPENGL_ERROR
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void OPENGL_ERROR(const char* message) {
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GLenum r = glGetError();
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@ -583,6 +660,76 @@ void GFX_TearDown(void) {
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}
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}
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#if C_OPENGL
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/* Create a GLSL shader object, load the shader source, and compile the shader. */
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static GLuint BuildShader ( GLenum type, const char *shaderSrc ) {
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GLuint shader;
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GLint compiled;
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const char* src_strings[2];
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std::string top;
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// look for "#version" because it has to occur first
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const char *ver = strstr(shaderSrc, "#version ");
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if (ver) {
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const char *endline = strchr(ver+9, '\n');
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if (endline) {
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top.assign(shaderSrc, endline-shaderSrc+1);
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shaderSrc = endline+1;
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}
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}
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top += (type==GL_VERTEX_SHADER) ? "#define VERTEX 1\n":"#define FRAGMENT 1\n";
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if (!sdl.opengl.bilinear)
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top += "#define OPENGLNB 1\n";
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src_strings[0] = top.c_str();
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src_strings[1] = shaderSrc;
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// Create the shader object
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shader = glCreateShader(type);
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if (shader == 0) return 0;
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// Load the shader source
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glShaderSource(shader, 2, src_strings, NULL);
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// Compile the shader
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glCompileShader(shader);
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// Check the compile status
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glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled);
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if (!compiled) {
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GLint infoLen = 0;
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glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infoLen);
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if (infoLen>1) {
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char* infoLog = (char*)malloc(infoLen);
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glGetShaderInfoLog(shader, infoLen, NULL, infoLog);
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LOG_MSG("Error compiling shader: %s", infoLog);
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free(infoLog);
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}
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glDeleteShader(shader);
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return 0;
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}
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return shader;
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}
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static bool GFX_LoadGLShaders(const char *src, GLuint *vertex, GLuint *fragment) {
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GLuint s = BuildShader(GL_VERTEX_SHADER, src);
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if (s) {
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*vertex = s;
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s = BuildShader(GL_FRAGMENT_SHADER, src);
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if (s) {
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*fragment = s;
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return true;
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}
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glDeleteShader(*vertex);
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}
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return false;
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}
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#endif
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Bitu GFX_SetSize(Bitu width,Bitu height,Bitu flags,double scalex,double scaley,GFX_CallBack_t callback) {
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if (sdl.updating)
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GFX_EndUpdate( 0 );
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@ -760,11 +907,106 @@ dosurface:
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#if SDL_VERSION_ATLEAST(1, 2, 11)
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SDL_GL_SetAttribute( SDL_GL_SWAP_CONTROL, 0 );
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#endif
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GFX_SetupSurfaceScaled(SDL_OPENGL,0);
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// try 32 bits first then 16
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if (GFX_SetupSurfaceScaled(SDL_OPENGL,32)==NULL) GFX_SetupSurfaceScaled(SDL_OPENGL,16);
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if (!sdl.surface || sdl.surface->format->BitsPerPixel<15) {
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LOG_MSG("SDL:OPENGL: Can't open drawing surface, are you running in 16bpp (or higher) mode?");
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goto dosurface;
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}
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if (sdl.opengl.use_shader) {
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GLboolean t;
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// confirm current context supports shaders
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glGetBooleanv(GL_SHADER_COMPILER, &t);
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if (t) {
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// check if existing program is valid
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if (sdl.opengl.program_object) {
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// reset error
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glGetError();
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glUseProgram(sdl.opengl.program_object);
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if (glGetError() != GL_NO_ERROR) {
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// program is not usable (probably new context), purge it
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glDeleteProgram(sdl.opengl.program_object);
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sdl.opengl.program_object = 0;
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}
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}
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// does program need to be rebuilt?
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if (sdl.opengl.program_object == 0) {
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GLuint vertexShader, fragmentShader;
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const char *src = sdl.opengl.shader_src;
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if (src && !GFX_LoadGLShaders(src, &vertexShader, &fragmentShader)) {
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LOG_MSG("SDL:OPENGL:Failed to compile shader, falling back to default");
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src = NULL;
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}
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if (src == NULL && !GFX_LoadGLShaders(shader_src_default, &vertexShader, &fragmentShader)) {
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LOG_MSG("SDL:OPENGL:Failed to compile default shader!");
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goto dosurface;
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}
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sdl.opengl.program_object = glCreateProgram();
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if (!sdl.opengl.program_object) {
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glDeleteShader(vertexShader);
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glDeleteShader(fragmentShader);
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LOG_MSG("SDL:OPENGL:Can't create program object, falling back to surface");
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goto dosurface;
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}
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glAttachShader(sdl.opengl.program_object, vertexShader);
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glAttachShader(sdl.opengl.program_object, fragmentShader);
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// Link the program
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glLinkProgram(sdl.opengl.program_object);
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// Even if we *are* successful, we may delete the shader objects
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glDeleteShader(vertexShader);
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glDeleteShader(fragmentShader);
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// Check the link status
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GLint isProgramLinked;
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glGetProgramiv(sdl.opengl.program_object, GL_LINK_STATUS, &isProgramLinked);
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if (!isProgramLinked) {
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GLint infoLen = 0;
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glGetProgramiv(sdl.opengl.program_object, GL_INFO_LOG_LENGTH, &infoLen);
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if (infoLen>1) {
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char *infoLog = (char*)malloc(infoLen);
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glGetProgramInfoLog(sdl.opengl.program_object, infoLen, NULL, infoLog);
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LOG_MSG("SDL:OPENGL:Error link prograram:\n %s", infoLog);
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free(infoLog);
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}
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glDeleteProgram(sdl.opengl.program_object);
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sdl.opengl.program_object = 0;
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goto dosurface;
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}
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glUseProgram(sdl.opengl.program_object);
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GLint u = glGetAttribLocation(sdl.opengl.program_object, "a_position");
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// upper left
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sdl.opengl.vertex_data[0] = -1.0f;
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sdl.opengl.vertex_data[1] = 1.0f;
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// lower left
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sdl.opengl.vertex_data[2] = -1.0f;
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sdl.opengl.vertex_data[3] = -3.0f;
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// upper right
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sdl.opengl.vertex_data[4] = 3.0f;
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sdl.opengl.vertex_data[5] = 1.0f;
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// Load the vertex positions
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glVertexAttribPointer(u, 2, GL_FLOAT, GL_FALSE, 0, sdl.opengl.vertex_data);
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glEnableVertexAttribArray(u);
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u = glGetUniformLocation(sdl.opengl.program_object, "rubyTexture");
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glUniform1i(u, 0);
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sdl.opengl.ruby.texture_size = glGetUniformLocation(sdl.opengl.program_object, "rubyTextureSize");
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sdl.opengl.ruby.input_size = glGetUniformLocation(sdl.opengl.program_object, "rubyInputSize");
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sdl.opengl.ruby.output_size = glGetUniformLocation(sdl.opengl.program_object, "rubyOutputSize");
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sdl.opengl.ruby.frame_count = glGetUniformLocation(sdl.opengl.program_object, "rubyFrameCount");
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// Don't force updating unless a shader depends on frame_count
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RENDER_SetForceUpdate(sdl.opengl.ruby.frame_count != (GLint)-1);
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}
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}
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}
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/* Create the texture and display list */
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if (sdl.opengl.pixel_buffer_object) {
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glGenBuffersARB(1, &sdl.opengl.buffer);
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@ -781,9 +1023,7 @@ dosurface:
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glViewport((sdl.surface->w-sdl.clip.w)/2,(sdl.surface->h-sdl.clip.h)/2,sdl.clip.w,sdl.clip.h);
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} else {
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glViewport(sdl.clip.x,sdl.clip.y,sdl.clip.w,sdl.clip.h);
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}
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glMatrixMode (GL_PROJECTION);
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}
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if (sdl.opengl.texture > 0) {
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glDeleteTextures(1,&sdl.opengl.texture);
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@ -810,32 +1050,42 @@ dosurface:
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glClear(GL_COLOR_BUFFER_BIT);
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SDL_GL_SwapBuffers();
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glClear(GL_COLOR_BUFFER_BIT);
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glShadeModel (GL_FLAT);
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glDisable (GL_DEPTH_TEST);
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glDisable (GL_LIGHTING);
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glDisable(GL_CULL_FACE);
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glEnable(GL_TEXTURE_2D);
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glMatrixMode (GL_MODELVIEW);
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glLoadIdentity ();
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GLfloat tex_width=((GLfloat)(width)/(GLfloat)texsize);
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GLfloat tex_height=((GLfloat)(height)/(GLfloat)texsize);
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if (sdl.opengl.program_object) {
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// Set shader variables
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glUniform2f(sdl.opengl.ruby.texture_size, (float)texsize, (float)texsize);
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glUniform2f(sdl.opengl.ruby.input_size, (float)width, (float)height);
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glUniform2f(sdl.opengl.ruby.output_size, sdl.clip.w, sdl.clip.h);
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// The following uniform is *not* set right now
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sdl.opengl.actual_frame_count = 0;
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} else {
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GLfloat tex_width=((GLfloat)(width)/(GLfloat)texsize);
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GLfloat tex_height=((GLfloat)(height)/(GLfloat)texsize);
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if (glIsList(sdl.opengl.displaylist)) glDeleteLists(sdl.opengl.displaylist, 1);
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sdl.opengl.displaylist = glGenLists(1);
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glNewList(sdl.opengl.displaylist, GL_COMPILE);
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glBindTexture(GL_TEXTURE_2D, sdl.opengl.texture);
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glShadeModel(GL_FLAT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glBegin(GL_TRIANGLES);
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// upper left
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glTexCoord2f(0,0); glVertex2f(-1.0f, 1.0f);
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// lower left
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glTexCoord2f(0,tex_height*2); glVertex2f(-1.0f,-3.0f);
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// upper right
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glTexCoord2f(tex_width*2,0); glVertex2f(3.0f, 1.0f);
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glEnd();
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if (glIsList(sdl.opengl.displaylist)) glDeleteLists(sdl.opengl.displaylist, 1);
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sdl.opengl.displaylist = glGenLists(1);
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glNewList(sdl.opengl.displaylist, GL_COMPILE);
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glBindTexture(GL_TEXTURE_2D, sdl.opengl.texture);
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glEndList();
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glBegin(GL_TRIANGLES);
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// upper left
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glTexCoord2f(0,0); glVertex2f(-1.0f, 1.0f);
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// lower left
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glTexCoord2f(0,tex_height*2); glVertex2f(-1.0f,-3.0f);
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// upper right
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glTexCoord2f(tex_width*2,0); glVertex2f(3.0f, 1.0f);
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glEnd();
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glEndList();
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}
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OPENGL_ERROR("End of setsize");
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@ -843,7 +1093,7 @@ dosurface:
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retFlags = GFX_CAN_32 | GFX_SCALING;
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if (sdl.opengl.pixel_buffer_object)
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retFlags |= GFX_HARDWARE;
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break;
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break;
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}//OPENGL
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#endif //C_OPENGL
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default:
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@ -856,6 +1106,19 @@ dosurface:
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return retFlags;
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}
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void GFX_SetShader(const char* src) {
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#if C_OPENGL
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if (!sdl.opengl.use_shader || src == sdl.opengl.shader_src)
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return;
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sdl.opengl.shader_src = src;
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if (sdl.opengl.program_object) {
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glDeleteProgram(sdl.opengl.program_object);
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sdl.opengl.program_object = 0;
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}
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#endif
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}
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void GFX_CaptureMouse(void) {
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sdl.mouse.locked=!sdl.mouse.locked;
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if (sdl.mouse.locked) {
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@ -1019,8 +1282,9 @@ void GFX_EndUpdate( const Bit16u *changedLines ) {
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#if C_DDRAW
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int ret;
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#endif
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if (!sdl.updating)
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if (((sdl.desktop.type != SCREEN_OPENGL) || !RENDER_GetForceUpdate()) && !sdl.updating)
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return;
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bool actually_updating = sdl.updating;
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sdl.updating=false;
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switch (sdl.desktop.type) {
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case SCREEN_SURFACE:
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@ -1085,6 +1349,15 @@ void GFX_EndUpdate( const Bit16u *changedLines ) {
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case SCREEN_OPENGL:
|
||||
// Clear drawing area. Some drivers (on Linux) have more than 2 buffers and the screen might
|
||||
// be dirty because of other programs.
|
||||
if (!actually_updating) {
|
||||
/* Don't really update; Just increase the frame counter.
|
||||
* If we tried to update it may have not worked so well
|
||||
* with VSync...
|
||||
* (Think of 60Hz on the host with 70Hz on the client.)
|
||||
*/
|
||||
sdl.opengl.actual_frame_count++;
|
||||
return;
|
||||
}
|
||||
glClearColor (0.0f, 0.0f, 0.0f, 1.0f);
|
||||
glClear(GL_COLOR_BUFFER_BIT);
|
||||
if (sdl.opengl.pixel_buffer_object) {
|
||||
|
|
@ -1094,8 +1367,6 @@ void GFX_EndUpdate( const Bit16u *changedLines ) {
|
|||
sdl.draw.width, sdl.draw.height, GL_BGRA_EXT,
|
||||
GL_UNSIGNED_INT_8_8_8_8_REV, 0);
|
||||
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_EXT, 0);
|
||||
glCallList(sdl.opengl.displaylist);
|
||||
SDL_GL_SwapBuffers();
|
||||
} else if (changedLines) {
|
||||
Bitu y = 0, index = 0;
|
||||
glBindTexture(GL_TEXTURE_2D, sdl.opengl.texture);
|
||||
|
|
@ -1112,9 +1383,14 @@ void GFX_EndUpdate( const Bit16u *changedLines ) {
|
|||
}
|
||||
index++;
|
||||
}
|
||||
glCallList(sdl.opengl.displaylist);
|
||||
SDL_GL_SwapBuffers();
|
||||
}
|
||||
} else
|
||||
return;
|
||||
|
||||
if (sdl.opengl.program_object) {
|
||||
glUniform1i(sdl.opengl.ruby.frame_count, sdl.opengl.actual_frame_count++);
|
||||
glDrawArrays(GL_TRIANGLES, 0, 3);
|
||||
} else glCallList(sdl.opengl.displaylist);
|
||||
SDL_GL_SwapBuffers();
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
|
|
@ -1438,6 +1714,31 @@ static void GUI_StartUp(Section * sec) {
|
|||
LOG_MSG("Could not initialize OpenGL, switching back to surface");
|
||||
sdl.desktop.want_type = SCREEN_SURFACE;
|
||||
} else {
|
||||
sdl.opengl.program_object = 0;
|
||||
glAttachShader = (PFNGLATTACHSHADERPROC)SDL_GL_GetProcAddress("glAttachShader");
|
||||
glCompileShader = (PFNGLCOMPILESHADERPROC)SDL_GL_GetProcAddress("glCompileShader");
|
||||
glCreateProgram = (PFNGLCREATEPROGRAMPROC)SDL_GL_GetProcAddress("glCreateProgram");
|
||||
glCreateShader = (PFNGLCREATESHADERPROC)SDL_GL_GetProcAddress("glCreateShader");
|
||||
glDeleteProgram = (PFNGLDELETEPROGRAMPROC)SDL_GL_GetProcAddress("glDeleteProgram");
|
||||
glDeleteShader = (PFNGLDELETESHADERPROC)SDL_GL_GetProcAddress("glDeleteShader");
|
||||
glEnableVertexAttribArray = (PFNGLENABLEVERTEXATTRIBARRAYPROC)SDL_GL_GetProcAddress("glEnableVertexAttribArray");
|
||||
glGetAttribLocation = (PFNGLGETATTRIBLOCATIONPROC)SDL_GL_GetProcAddress("glGetAttribLocation");
|
||||
glGetProgramiv = (PFNGLGETPROGRAMIVPROC)SDL_GL_GetProcAddress("glGetProgramiv");
|
||||
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)SDL_GL_GetProcAddress("glGetProgramInfoLog");
|
||||
glGetShaderiv = (PFNGLGETSHADERIVPROC)SDL_GL_GetProcAddress("glGetShaderiv");
|
||||
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)SDL_GL_GetProcAddress("glGetShaderInfoLog");
|
||||
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC)SDL_GL_GetProcAddress("glGetUniformLocation");
|
||||
glLinkProgram = (PFNGLLINKPROGRAMPROC)SDL_GL_GetProcAddress("glLinkProgram");
|
||||
glShaderSource = (PFNGLSHADERSOURCEPROC)SDL_GL_GetProcAddress("glShaderSource");
|
||||
glUniform2f = (PFNGLUNIFORM2FPROC)SDL_GL_GetProcAddress("glUniform2f");
|
||||
glUniform1i = (PFNGLUNIFORM1IPROC)SDL_GL_GetProcAddress("glUniform1i");
|
||||
glUseProgram = (PFNGLUSEPROGRAMPROC)SDL_GL_GetProcAddress("glUseProgram");
|
||||
glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)SDL_GL_GetProcAddress("glVertexAttribPointer");
|
||||
sdl.opengl.use_shader = (glAttachShader && glCompileShader && glCreateProgram && glDeleteProgram && glDeleteShader && \
|
||||
glEnableVertexAttribArray && glGetAttribLocation && glGetProgramiv && glGetProgramInfoLog && \
|
||||
glGetShaderiv && glGetShaderInfoLog && glGetUniformLocation && glLinkProgram && glShaderSource && \
|
||||
glUniform2f && glUniform1i && glUseProgram && glVertexAttribPointer);
|
||||
|
||||
sdl.opengl.buffer=0;
|
||||
sdl.opengl.framebuf=0;
|
||||
sdl.opengl.texture=0;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue