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tinyfx.c
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tinyfx.c
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#define TFX_IMPLEMENTATION
#if !defined(TFX_DEBUG) && defined(_DEBUG)
// enable tfx debug in msvc debug configurations.
#define TFX_DEBUG
#endif
#include "tinyfx.h"
#ifdef TFX_LEAK_CHECK
#define STB_LEAKCHECK_IMPLEMENTATION
#include "stb_leakcheck.h"
#endif
/**********************\
| implementation stuff |
\**********************/
#ifdef TFX_IMPLEMENTATION
#ifdef __cplusplus
extern "C" {
#endif
// TODO: look into just keeping the stuff from GL header in here, this thing
// isn't included on many systems and is kind of annoying to always need.
#include <GL/glcorearb.h>
//#ifdef __ANDROID__
//#include <GLES3/gl32.h>
//#endif
#include <math.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#ifdef TFX_DEBUG
#include <assert.h>
#else
#define assert(op) (void)(op);
#endif
// needed on msvc
#if defined(_MSC_VER) && !defined(snprintf)
#define snprintf _snprintf
#endif
#ifdef _MSC_VER
#pragma warning( push )
#pragma warning( disable : 4996 )
#endif
#ifndef TFX_TRANSIENT_BUFFER_COUNT
#define TFX_TRANSIENT_BUFFER_COUNT 3
#endif
#ifndef TFX_UNIFORM_BUFFER_SIZE
// by default, allow up to 4MB of uniform updates per frame.
#define TFX_UNIFORM_BUFFER_SIZE 1024*1024*4
#endif
#ifndef TFX_TRANSIENT_BUFFER_SIZE
// by default, allow up to 4MB of transient buffer data per frame.
#define TFX_TRANSIENT_BUFFER_SIZE 1024*1024*4
#endif
// The following code is public domain, from https://github.com/nothings/stb
//////////////////////////////////////////////////////////////////////////////
#ifdef __cplusplus
#define STB_STRETCHY_BUFFER_CPP
#endif
#ifndef STB_STRETCHY_BUFFER_H_INCLUDED
#define STB_STRETCHY_BUFFER_H_INCLUDED
#ifndef NO_STRETCHY_BUFFER_SHORT_NAMES
#define sb_free stb_sb_free
#define sb_push stb_sb_push
#define sb_count stb_sb_count
#define sb_add stb_sb_add
#define sb_last stb_sb_last
#endif
#ifdef STB_STRETCHY_BUFFER_CPP
#define stb_sb_push(t,a,v) (stb__sbmaybegrow(t,a,1), (a)[stb__sbn(a)++] = (v))
#define stb_sb_add(t,a,n) (stb__sbmaybegrow(t,a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)])
#define stb__sbmaybegrow(t,a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(t,a,n) : 0)
#define stb__sbgrow(t,a,n) ((a) = (t*)stb__sbgrowf((void*)(a), (n), sizeof(t)))
#else
#define stb_sb_push(a,v) (stb__sbmaybegrow(a,1), (a)[stb__sbn(a)++] = (v))
#define stb_sb_add(a,n) (stb__sbmaybegrow(a,n), stb__sbn(a)+=(n), &(a)[stb__sbn(a)-(n)])
#define stb__sbmaybegrow(a,n) (stb__sbneedgrow(a,(n)) ? stb__sbgrow(a,n) : 0)
#define stb__sbgrow(a,n) ((a) = stb__sbgrowf((a), (n), sizeof(*(a))))
#endif
#define stb_sb_free(a) ((a) ? free(stb__sbraw(a)),0 : 0)
#define stb_sb_count(a) ((a) ? stb__sbn(a) : 0)
#define stb_sb_last(a) ((a)[stb__sbn(a)-1])
#define stb__sbraw(a) ((int *) (a) - 2)
#define stb__sbm(a) stb__sbraw(a)[0]
#define stb__sbn(a) stb__sbraw(a)[1]
#define stb__sbneedgrow(a,n) ((a)==0 || stb__sbn(a)+(n) >= stb__sbm(a))
#include <stdlib.h>
static void * stb__sbgrowf(void *arr, int increment, int itemsize)
{
int dbl_cur = arr ? 2 * stb__sbm(arr) : 0;
int min_needed = stb_sb_count(arr) + increment;
int m = dbl_cur > min_needed ? dbl_cur : min_needed;
int *p = (int *)realloc(arr ? stb__sbraw(arr) : 0, itemsize * m + sizeof(int) * 2);
if (p) {
if (!arr)
p[1] = 0;
p[0] = m;
return p + 2;
}
else {
#ifdef STRETCHY_BUFFER_OUT_OF_MEMORY
STRETCHY_BUFFER_OUT_OF_MEMORY;
#endif
return (void *)(2 * sizeof(int)); // try to force a NULL pointer exception later
}
}
#endif // STB_STRETCHY_BUFFER_H_INCLUDED
//////////////////////////////////////////////////////////////////////////////
static char *tfx_strdup(const char *src) {
size_t len = strlen(src) + 1;
char *s = malloc(len);
if (s == NULL)
return NULL;
// copy len includes the \0 terminator
return (char *)memcpy(s, src, len);
}
#ifdef TFX_DEBUG
//#define TFX_FATAL_ERRORS
# ifdef TFX_FATAL_ERRORS
# define CHECK(fn) fn; { GLenum _status; while ((_status = tfx_glGetError())) { if (_status == GL_NO_ERROR) break; TFX_ERROR("%s:%d GL ERROR: %d", __FILE__, __LINE__, _status); assert(0); } }
# else
# define CHECK(fn) fn; { GLenum _status; while ((_status = tfx_glGetError())) { if (_status == GL_NO_ERROR) break; TFX_ERROR("%s:%d GL ERROR: %d", __FILE__, __LINE__, _status); } }
# endif
#else
# define CHECK(fn) fn;
#endif
#define TFX_INFO(msg, ...) tfx_printf(TFX_SEVERITY_INFO, msg, __VA_ARGS__)
#define TFX_WARN(msg, ...) tfx_printf(TFX_SEVERITY_WARNING, msg, __VA_ARGS__)
#define TFX_ERROR(msg, ...) tfx_printf(TFX_SEVERITY_ERROR, msg, __VA_ARGS__)
#define TFX_FATAL(msg, ...) tfx_printf(TFX_SEVERITY_FATAL, msg, __VA_ARGS__)
#define VIEW_MAX 256
#define TIMER_LATENCY 3
#define TIMER_COUNT ((VIEW_MAX+1)*TIMER_LATENCY)
// view flags
enum {
// clear modes
TFXI_VIEW_CLEAR_COLOR = 1 << 0,
TFXI_VIEW_CLEAR_DEPTH = 1 << 1,
// depth modes
TFXI_VIEW_DEPTH_TEST_LT = 1 << 2,
TFXI_VIEW_DEPTH_TEST_GT = 1 << 3,
TFXI_VIEW_DEPTH_TEST_EQ = 1 << 4,
// scissor test
TFXI_VIEW_SCISSOR = 1 << 5,
TFXI_VIEW_INVALIDATE = 1 << 6,
TFXI_VIEW_FLUSH = 1 << 7,
TFXI_VIEW_SORT_SEQUENTIAL = 1 << 8
};
typedef struct tfx_rect {
uint16_t x;
uint16_t y;
uint16_t w;
uint16_t h;
} tfx_rect;
typedef struct tfx_blit_op {
tfx_canvas *source;
int source_mip;
tfx_rect rect;
GLenum mask;
} tfx_blit_op;
typedef struct tfx_draw {
tfx_draw_callback callback;
uint64_t flags;
tfx_program program;
tfx_uniform *uniforms;
tfx_texture textures[8];
uint8_t textures_mip[8];
bool textures_write[8];
tfx_buffer ssbos[8];
bool ssbo_write[8];
tfx_buffer vbo;
bool use_vbo;
tfx_buffer ibo;
bool use_ibo;
tfx_vertex_format tvb_fmt;
bool use_tvb;
tfx_rect scissor_rect;
bool use_scissor;
size_t offset;
uint32_t indices;
uint32_t depth;
// for compute jobs
uint32_t threads_x;
uint32_t threads_y;
uint32_t threads_z;
} tfx_draw;
typedef struct tfx_view {
uint32_t flags;
const char *name;
bool has_canvas;
tfx_canvas canvas;
int canvas_layer;
tfx_draw *draws;
tfx_draw *jobs;
tfx_blit_op *blits;
unsigned clear_color;
float clear_depth;
tfx_rect scissor_rect;
// https://opengl.gpuinfo.org/displaycapability.php?name=GL_MAX_VIEWPORTS
tfx_rect viewports[16];
int viewport_count;
// for single pass rendering to eyes, cubes, shadowmaps etc.
int instance_mul;
float view[16];
float proj_left[16];
float proj_right[16];
} tfx_view;
#define TFXI_VIEW_CLEAR_MASK (TFXI_VIEW_CLEAR_COLOR | TFXI_VIEW_CLEAR_DEPTH)
#define TFXI_VIEW_DEPTH_TEST_MASK (TFXI_VIEW_DEPTH_TEST_LT | TFXI_VIEW_DEPTH_TEST_GT | TFXI_VIEW_DEPTH_TEST_EQ)
#define TFXI_STATE_CULL_MASK (TFX_STATE_CULL_CW | TFX_STATE_CULL_CCW)
#define TFXI_STATE_BLEND_MASK (TFX_STATE_BLEND_ALPHA)
#define TFXI_STATE_DRAW_MASK (TFX_STATE_DRAW_POINTS \
| TFX_STATE_DRAW_LINES | TFX_STATE_DRAW_LINE_STRIP | TFX_STATE_DRAW_LINE_LOOP \
| TFX_STATE_DRAW_TRI_STRIP | TFX_STATE_DRAW_TRI_FAN \
)
static tfx_canvas g_backbuffer;
static tfx_timing_info last_timings[VIEW_MAX];
static tfx_platform_data g_platform_data;
typedef struct tfx_glext {
const char *ext;
bool supported;
} tfx_glext;
static tfx_glext available_exts[] = {
{ "GL_ARB_multisample", false },
{ "GL_ARB_compute_shader", false },
{ "GL_ARB_texture_float", false },
{ "GL_EXT_debug_marker", false },
{ "GL_ARB_debug_output", false },
{ "GL_KHR_debug", false },
{ "GL_NVX_gpu_memory_info", false },
// guaranteed by desktop GL 3.3+ or GLES 3.0+
{ "GL_ARB_instanced_arrays", false },
{ "GL_ARB_seamless_cube_map", false },
{ "GL_EXT_texture_filter_anisotropic", false },
{ "GL_ARB_multi_bind", false },
// TODO
// GL_AMD_vertex_shader_layer
// GL_AMD_vertex_shader_viewport_index
// GL_ARB_multi_bind
// GL_ARB_multi_draw_indirect
// GL_QCOM_texture_foveated
// GL_OVR_multiview2
// GL_OVR_multiview_multisampled_render_to_texture
// GL_OES_element_index_uint
// GL_OES_depth24
// GL_OES_depth_texture
// GL_OES_depth_texture_cube_map
// GL_EXT_sRGB
// GL_EXT_multisampled_render_to_texture
// GL_EXT_disjoint_timer_query
// GL_EXT_clip_control
// GL_EXT_clip_cull_distance
// GL_EXT_color_buffer_float
// GL_EXT_color_buffer_half_float
{ NULL, false }
};
PFNGLFLUSHPROC tfx_glFlush;
PFNGLGETSTRINGPROC tfx_glGetString;
PFNGLGETSTRINGIPROC tfx_glGetStringi;
PFNGLGETERRORPROC tfx_glGetError;
PFNGLBLENDFUNCPROC tfx_glBlendFunc;
PFNGLCOLORMASKPROC tfx_glColorMask;
PFNGLGETINTEGERVPROC tfx_glGetIntegerv;
PFNGLGETFLOATVPROC tfx_glGetFloatv;
PFNGLGENQUERIESPROC tfx_glGenQueries;
PFNGLDELETEQUERIESPROC tfx_glDeleteQueries;
PFNGLBEGINQUERYPROC tfx_glBeginQuery;
PFNGLENDQUERYPROC tfx_glEndQuery;
PFNGLQUERYCOUNTERPROC tfx_glQueryCounter;
PFNGLGETQUERYOBJECTUIVPROC tfx_glGetQueryObjectuiv;
PFNGLGETQUERYOBJECTUI64VPROC tfx_glGetQueryObjectui64v;
PFNGLGENBUFFERSPROC tfx_glGenBuffers;
PFNGLBINDBUFFERPROC tfx_glBindBuffer;
PFNGLBUFFERDATAPROC tfx_glBufferData;
PFNGLBUFFERSTORAGEPROC tfx_glBufferStorage;
PFNGLDELETEBUFFERSPROC tfx_glDeleteBuffers;
PFNGLDELETETEXTURESPROC tfx_glDeleteTextures;
PFNGLCREATESHADERPROC tfx_glCreateShader;
PFNGLSHADERSOURCEPROC tfx_glShaderSource;
PFNGLCOMPILESHADERPROC tfx_glCompileShader;
PFNGLGETSHADERIVPROC tfx_glGetShaderiv;
PFNGLGETSHADERINFOLOGPROC tfx_glGetShaderInfoLog;
PFNGLDELETESHADERPROC tfx_glDeleteShader;
PFNGLCREATEPROGRAMPROC tfx_glCreateProgram;
PFNGLATTACHSHADERPROC tfx_glAttachShader;
PFNGLBINDATTRIBLOCATIONPROC tfx_glBindAttribLocation;
PFNGLLINKPROGRAMPROC tfx_glLinkProgram;
PFNGLGETPROGRAMIVPROC tfx_glGetProgramiv;
PFNGLGETPROGRAMINFOLOGPROC tfx_glGetProgramInfoLog;
PFNGLDELETEPROGRAMPROC tfx_glDeleteProgram;
PFNGLGENTEXTURESPROC tfx_glGenTextures;
PFNGLBINDTEXTUREPROC tfx_glBindTexture;
PFNGLBINDTEXTURESPROC tfx_glBindTextures;
PFNGLTEXPARAMETERIPROC tfx_glTexParameteri;
PFNGLTEXPARAMETERIVPROC tfx_glTexParameteriv;
PFNGLTEXPARAMETERFPROC tfx_glTexParameterf;
PFNGLPIXELSTOREIPROC tfx_glPixelStorei;
PFNGLTEXIMAGE2DPROC tfx_glTexImage2D;
PFNGLTEXIMAGE3DPROC tfx_glTexImage3D;
PFNGLTEXIMAGE2DMULTISAMPLEPROC tfx_glTexImage2DMultisample;
PFNGLTEXSTORAGE2DPROC tfx_glTexStorage2D;
PFNGLTEXSTORAGE3DPROC tfx_glTexStorage3D;
PFNGLTEXSTORAGE2DMULTISAMPLEPROC tfx_glTexStorage2DMultisample;
PFNGLTEXSUBIMAGE2DPROC tfx_glTexSubImage2D;
PFNGLTEXSUBIMAGE3DPROC tfx_glTexSubImage3D;
PFNGLINVALIDATETEXSUBIMAGEPROC tfx_glInvalidateTexSubImage;
PFNGLGENERATEMIPMAPPROC tfx_glGenerateMipmap;
PFNGLGENFRAMEBUFFERSPROC tfx_glGenFramebuffers;
PFNGLDELETEFRAMEBUFFERSPROC tfx_glDeleteFramebuffers;
PFNGLBINDFRAMEBUFFERPROC tfx_glBindFramebuffer;
PFNGLBLITFRAMEBUFFERPROC tfx_glBlitFramebuffer;
PFNGLCOPYIMAGESUBDATAPROC tfx_glCopyImageSubData;
PFNGLFRAMEBUFFERTEXTURE2DPROC tfx_glFramebufferTexture2D;
PFNGLINVALIDATEFRAMEBUFFERPROC tfx_glInvalidateFramebuffer;
PFNGLGENRENDERBUFFERSPROC tfx_glGenRenderbuffers;
PFNGLBINDRENDERBUFFERPROC tfx_glBindRenderbuffer;
PFNGLRENDERBUFFERSTORAGEPROC tfx_glRenderbufferStorage;
PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC tfx_glRenderbufferStorageMultisample;
PFNGLFRAMEBUFFERRENDERBUFFERPROC tfx_glFramebufferRenderbuffer;
PFNGLFRAMEBUFFERTEXTUREPROC tfx_glFramebufferTexture;
PFNGLDRAWBUFFERSPROC tfx_glDrawBuffers;
PFNGLREADBUFFERPROC tfx_glReadBuffer;
PFNGLCHECKFRAMEBUFFERSTATUSPROC tfx_glCheckFramebufferStatus;
PFNGLGETUNIFORMLOCATIONPROC tfx_glGetUniformLocation;
PFNGLRELEASESHADERCOMPILERPROC tfx_glReleaseShaderCompiler;
PFNGLGENVERTEXARRAYSPROC tfx_glGenVertexArrays;
PFNGLBINDVERTEXARRAYPROC tfx_glBindVertexArray;
PFNGLMAPBUFFERRANGEPROC tfx_glMapBufferRange;
PFNGLBUFFERSUBDATAPROC tfx_glBufferSubData;
PFNGLUNMAPBUFFERPROC tfx_glUnmapBuffer;
PFNGLUSEPROGRAMPROC tfx_glUseProgram;
PFNGLMEMORYBARRIERPROC tfx_glMemoryBarrier;
PFNGLBINDBUFFERBASEPROC tfx_glBindBufferBase;
PFNGLDISPATCHCOMPUTEPROC tfx_glDispatchCompute;
PFNGLVIEWPORTPROC tfx_glViewport;
PFNGLVIEWPORTINDEXEDFPROC tfx_glViewportIndexedf;
PFNGLSCISSORPROC tfx_glScissor;
PFNGLCLEARCOLORPROC tfx_glClearColor;
PFNGLCLEARDEPTHFPROC tfx_glClearDepthf;
PFNGLCLEARPROC tfx_glClear;
PFNGLENABLEPROC tfx_glEnable;
PFNGLDEPTHFUNCPROC tfx_glDepthFunc;
PFNGLDISABLEPROC tfx_glDisable;
PFNGLDEPTHMASKPROC tfx_glDepthMask;
PFNGLFRONTFACEPROC tfx_glFrontFace;
PFNGLPOLYGONMODEPROC tfx_glPolygonMode;
PFNGLUNIFORM1IVPROC tfx_glUniform1iv;
PFNGLUNIFORM1FVPROC tfx_glUniform1fv;
PFNGLUNIFORM2FVPROC tfx_glUniform2fv;
PFNGLUNIFORM3FVPROC tfx_glUniform3fv;
PFNGLUNIFORM4FVPROC tfx_glUniform4fv;
PFNGLUNIFORMMATRIX2FVPROC tfx_glUniformMatrix2fv;
PFNGLUNIFORMMATRIX3FVPROC tfx_glUniformMatrix3fv;
PFNGLUNIFORMMATRIX4FVPROC tfx_glUniformMatrix4fv;
PFNGLENABLEVERTEXATTRIBARRAYPROC tfx_glEnableVertexAttribArray;
PFNGLVERTEXATTRIBPOINTERPROC tfx_glVertexAttribPointer;
PFNGLDISABLEVERTEXATTRIBARRAYPROC tfx_glDisableVertexAttribArray;
PFNGLACTIVETEXTUREPROC tfx_glActiveTexture;
PFNGLDRAWELEMENTSINSTANCEDPROC tfx_glDrawElementsInstanced;
PFNGLDRAWARRAYSINSTANCEDPROC tfx_glDrawArraysInstanced;
PFNGLDRAWELEMENTSPROC tfx_glDrawElements;
PFNGLDRAWARRAYSPROC tfx_glDrawArrays;
PFNGLDELETEVERTEXARRAYSPROC tfx_glDeleteVertexArrays;
PFNGLBINDFRAGDATALOCATIONPROC tfx_glBindFragDataLocation;
// debug output/markers
PFNGLPUSHDEBUGGROUPPROC tfx_glPushDebugGroup;
PFNGLPOPDEBUGGROUPPROC tfx_glPopDebugGroup;
PFNGLINSERTEVENTMARKEREXTPROC tfx_glInsertEventMarkerEXT;
void load_em_up(void* (*get_proc_address)(const char*)) {
tfx_glFlush = get_proc_address("glFlush");
tfx_glGetString = get_proc_address("glGetString");
tfx_glGetStringi = get_proc_address("glGetStringi");
tfx_glGetError = get_proc_address("glGetError");
tfx_glBlendFunc = get_proc_address("glBlendFunc");
tfx_glColorMask = get_proc_address("glColorMask");
tfx_glGetIntegerv = get_proc_address("glGetIntegerv");
tfx_glGetFloatv = get_proc_address("glGetFloatv");
tfx_glGenQueries = get_proc_address("glGenQueries");
tfx_glDeleteQueries = get_proc_address("glDeleteQueries");
tfx_glBeginQuery = get_proc_address("glBeginQuery");
tfx_glEndQuery = get_proc_address("glEndQuery");
tfx_glQueryCounter = get_proc_address("glQueryCounter");
tfx_glGetQueryObjectuiv = get_proc_address("glGetQueryObjectuiv");
tfx_glGetQueryObjectui64v = get_proc_address("glGetQueryObjectui64v");
tfx_glGenBuffers = get_proc_address("glGenBuffers");
tfx_glBindBuffer = get_proc_address("glBindBuffer");
tfx_glBufferData = get_proc_address("glBufferData");
tfx_glBufferStorage = get_proc_address("glBufferStorage");
tfx_glDeleteBuffers = get_proc_address("glDeleteBuffers");
tfx_glDeleteTextures= get_proc_address("glDeleteTextures");
tfx_glCreateShader = get_proc_address("glCreateShader");
tfx_glShaderSource = get_proc_address("glShaderSource");
tfx_glCompileShader = get_proc_address("glCompileShader");
tfx_glGetShaderiv = get_proc_address("glGetShaderiv");
tfx_glGetShaderInfoLog = get_proc_address("glGetShaderInfoLog");
tfx_glDeleteShader = get_proc_address("glDeleteShader");
tfx_glCreateProgram = get_proc_address("glCreateProgram");
tfx_glAttachShader = get_proc_address("glAttachShader");
tfx_glBindAttribLocation = get_proc_address("glBindAttribLocation");
tfx_glLinkProgram = get_proc_address("glLinkProgram");
tfx_glGetProgramiv = get_proc_address("glGetProgramiv");
tfx_glGetProgramInfoLog = get_proc_address("glGetProgramInfoLog");
tfx_glDeleteProgram = get_proc_address("glDeleteProgram");
tfx_glGenTextures = get_proc_address("glGenTextures");
tfx_glBindTexture = get_proc_address("glBindTexture");
tfx_glBindTextures = get_proc_address("glBindTextures"); // GL_ARB_multi_bind (GL 4.4)
tfx_glTexParameteri = get_proc_address("glTexParameteri");
tfx_glTexParameteriv = get_proc_address("glTexParameteriv");
tfx_glTexParameterf = get_proc_address("glTexParameterf");
tfx_glPixelStorei = get_proc_address("glPixelStorei");
tfx_glTexImage2D = get_proc_address("glTexImage2D");
tfx_glTexImage3D = get_proc_address("glTexImage3D");
tfx_glTexImage2DMultisample = get_proc_address("glTexImage2DMultisample");
tfx_glTexStorage2D = get_proc_address("glTexStorage2D");
tfx_glTexStorage3D = get_proc_address("glTexStorage3D");
tfx_glTexStorage2DMultisample = get_proc_address("glTexStorage2DMultisample");
tfx_glTexSubImage2D = get_proc_address("glTexSubImage2D");
tfx_glTexSubImage3D = get_proc_address("glTexSubImage3D");
tfx_glInvalidateTexSubImage = get_proc_address("glInvalidateTexSubImage");
tfx_glGenerateMipmap = get_proc_address("glGenerateMipmap");
tfx_glGenFramebuffers = get_proc_address("glGenFramebuffers");
tfx_glDeleteFramebuffers = get_proc_address("glDeleteFramebuffers");
tfx_glBindFramebuffer = get_proc_address("glBindFramebuffer");
tfx_glBlitFramebuffer = get_proc_address("glBlitFramebuffer");
tfx_glCopyImageSubData = get_proc_address("glCopyImageSubData");
tfx_glFramebufferTexture2D = get_proc_address("glFramebufferTexture2D");
tfx_glInvalidateFramebuffer = get_proc_address("glInvalidateFramebuffer");
tfx_glGenRenderbuffers = get_proc_address("glGenRenderbuffers");
tfx_glBindRenderbuffer = get_proc_address("glBindRenderbuffer");
tfx_glRenderbufferStorage = get_proc_address("glRenderbufferStorage");
tfx_glRenderbufferStorageMultisample = get_proc_address("glRenderbufferStorageMultisample");
tfx_glFramebufferRenderbuffer = get_proc_address("glFramebufferRenderbuffer");
tfx_glFramebufferTexture = get_proc_address("glFramebufferTexture");
tfx_glDrawBuffers = get_proc_address("glDrawBuffers");
tfx_glReadBuffer = get_proc_address("glReadBuffer");
tfx_glCheckFramebufferStatus = get_proc_address("glCheckFramebufferStatus");
tfx_glGetUniformLocation = get_proc_address("glGetUniformLocation");
tfx_glReleaseShaderCompiler = get_proc_address("glReleaseShaderCompiler");
tfx_glGenVertexArrays = get_proc_address("glGenVertexArrays");
tfx_glBindVertexArray = get_proc_address("glBindVertexArray");
tfx_glMapBufferRange = get_proc_address("glMapBufferRange");
tfx_glBufferSubData = get_proc_address("glBufferSubData");
tfx_glUnmapBuffer = get_proc_address("glUnmapBuffer");
tfx_glUseProgram = get_proc_address("glUseProgram");
tfx_glMemoryBarrier = get_proc_address("glMemoryBarrier");
tfx_glBindBufferBase = get_proc_address("glBindBufferBase");
tfx_glDispatchCompute = get_proc_address("glDispatchCompute");
tfx_glViewport = get_proc_address("glViewport");
tfx_glViewportIndexedf = get_proc_address("glViewportIndexedf");
tfx_glScissor = get_proc_address("glScissor");
tfx_glClearColor = get_proc_address("glClearColor");
tfx_glClearDepthf = get_proc_address("glClearDepthf");
tfx_glClear = get_proc_address("glClear");
tfx_glEnable = get_proc_address("glEnable");
tfx_glDepthFunc = get_proc_address("glDepthFunc");
tfx_glDisable = get_proc_address("glDisable");
tfx_glDepthMask = get_proc_address("glDepthMask");
tfx_glFrontFace = get_proc_address("glFrontFace");
tfx_glPolygonMode = get_proc_address("glPolygonMode");
tfx_glUniform1iv = get_proc_address("glUniform1iv");
tfx_glUniform1fv = get_proc_address("glUniform1fv");
tfx_glUniform2fv = get_proc_address("glUniform2fv");
tfx_glUniform3fv = get_proc_address("glUniform3fv");
tfx_glUniform4fv = get_proc_address("glUniform4fv");
tfx_glUniformMatrix2fv = get_proc_address("glUniformMatrix2fv");
tfx_glUniformMatrix3fv = get_proc_address("glUniformMatrix3fv");
tfx_glUniformMatrix4fv = get_proc_address("glUniformMatrix4fv");
tfx_glEnableVertexAttribArray = get_proc_address("glEnableVertexAttribArray");
tfx_glVertexAttribPointer = get_proc_address("glVertexAttribPointer");
tfx_glDisableVertexAttribArray = get_proc_address("glDisableVertexAttribArray");
tfx_glActiveTexture = get_proc_address("glActiveTexture");
tfx_glDrawElementsInstanced = get_proc_address("glDrawElementsInstanced");
tfx_glDrawArraysInstanced = get_proc_address("glDrawArraysInstanced");
tfx_glDrawElements = get_proc_address("glDrawElements");
tfx_glDrawArrays = get_proc_address("glDrawArrays");
tfx_glDeleteVertexArrays = get_proc_address("glDeleteVertexArrays");
tfx_glBindFragDataLocation = get_proc_address("glBindFragDataLocation");
tfx_glPushDebugGroup = get_proc_address("glPushDebugGroup");
tfx_glPopDebugGroup = get_proc_address("glPopDebugGroup");
tfx_glInsertEventMarkerEXT = get_proc_address("glInsertEventMarkerEXT");
}
static const char *tfx_sprintf(const char *fmt, ...) {
va_list args;
va_start(args, fmt);
char *buf = NULL;
int need = vsnprintf(buf, 0, fmt, args) + 1;
va_end(args);
va_start(args, fmt);
buf = malloc(need + 1);
buf[need] = '\0';
vsnprintf(buf, need, fmt, args);
va_end(args);
return buf;
}
static void tfx_printf(tfx_severity severity, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
char *buf = NULL;
int need = vsnprintf(buf, 0, fmt, args) + 1;
va_end(args);
va_start(args, fmt);
buf = malloc(need + 1);
buf[need] = '\0';
vsnprintf(buf, need, fmt, args);
g_platform_data.info_log(buf, severity);
free(buf);
va_end(args);
}
static void tfx_printb(tfx_severity severity, const char *k, bool v) {
tfx_printf(severity, "TinyFX %s: %s", k, v ? "true" : "false");
}
static float g_max_aniso = 0.0f;
tfx_caps tfx_get_caps() {
tfx_caps caps;
memset(&caps, 0, sizeof(tfx_caps));
if (tfx_glGetStringi) {
GLint ext_count = 0;
CHECK(tfx_glGetIntegerv(GL_NUM_EXTENSIONS, &ext_count));
for (int i = 0; i < ext_count; i++) {
const char *search = (const char*)CHECK(tfx_glGetStringi(GL_EXTENSIONS, i));
#if defined(_MSC_VER) && 0
OutputDebugString(search);
OutputDebugString("\n");
#endif
for (int j = 0;; j++) {
tfx_glext *tmp = &available_exts[j];
if (!tmp->ext) {
break;
}
if (strcmp(tmp->ext, search) == 0) {
tmp->supported = true;
break;
}
}
}
}
else if (tfx_glGetString) {
const char *real = (const char*)CHECK(tfx_glGetString(GL_EXTENSIONS));
char *exts = tfx_strdup(real);
char *pch = strtok(exts, " ");
int len = 0;
char **supported = NULL;
while (pch != NULL) {
sb_push(supported, pch);
pch = strtok(NULL, " ");
len++;
}
free(exts);
int n = sb_count(supported);
for (int i = 0; i < n; i++) {
const char *search = supported[i];
for (int j = 0; ; j++) {
tfx_glext *tmp = &available_exts[j];
if (!tmp->ext) {
break;
}
if (strcmp(tmp->ext, search) == 0) {
tmp->supported = true;
break;
}
}
}
sb_free(supported);
}
bool gl30 = g_platform_data.context_version >= 30 && !g_platform_data.use_gles;
bool gl32 = g_platform_data.context_version >= 32 && !g_platform_data.use_gles;
bool gl33 = g_platform_data.context_version >= 33 && !g_platform_data.use_gles;
bool gl43 = g_platform_data.context_version >= 43 && !g_platform_data.use_gles;
bool gl44 = g_platform_data.context_version >= 44 && !g_platform_data.use_gles;
bool gl46 = g_platform_data.context_version >= 46 && !g_platform_data.use_gles;
bool gles30 = g_platform_data.context_version >= 30 && g_platform_data.use_gles;
bool gles31 = g_platform_data.context_version >= 31 && g_platform_data.use_gles;
caps.multisample = available_exts[0].supported || gl30;
caps.compute = available_exts[1].supported || gles31 || gl43;
caps.float_canvas = available_exts[2].supported || gles30 || gl30;
caps.debug_marker = available_exts[3].supported || available_exts[5].supported;
caps.debug_output = available_exts[4].supported || gl43;
caps.memory_info = available_exts[6].supported;
caps.instancing = available_exts[7].supported || gl33 || gles30;
caps.seamless_cubemap = available_exts[8].supported || gl32;
caps.anisotropic_filtering = available_exts[9].supported || gl46;
caps.multibind = available_exts[10].supported || gl44;
g_max_aniso = 0.0f;
GLenum GL_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FE;
if (caps.anisotropic_filtering) {
GLenum GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT = 0x84FF;
CHECK(tfx_glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &g_max_aniso));
if (g_max_aniso <= 0.0f) {
caps.anisotropic_filtering = false;
}
}
return caps;
}
void tfx_dump_caps() {
tfx_caps caps = tfx_get_caps();
// I am told by the docs that this can be 0.
// It's not on the RPi, but since it's only a few lines of code...
int release_shader_c = 0;
tfx_glGetIntegerv(GL_SHADER_COMPILER, &release_shader_c);
TFX_INFO("GL shader compiler control: %d", release_shader_c);
TFX_INFO("GL vendor: %s", tfx_glGetString(GL_VENDOR));
TFX_INFO("GL version: %s", tfx_glGetString(GL_VERSION));
TFX_INFO("%s", "GL extensions:");
if (tfx_glGetStringi) {
GLint ext_count = 0;
CHECK(tfx_glGetIntegerv(GL_NUM_EXTENSIONS, &ext_count));
for (int i = 0; i < ext_count; i++) {
const char *real = (const char*)CHECK(tfx_glGetStringi(GL_EXTENSIONS, i));
TFX_INFO("\t%s", real);
}
}
else if (tfx_glGetString) {
const char *real = (const char*)CHECK(tfx_glGetString(GL_EXTENSIONS));
char *exts = tfx_strdup(real);
int len = 0;
char *pch = strtok(exts, " ");
while (pch != NULL) {
TFX_INFO("\t%s", pch);
pch = strtok(NULL, " ");
len++;
}
free(exts);
}
#define FUG(V) "GLES" #V
const char *glver =
#ifdef TFX_USE_GLES // NYI
FUG(TFX_USE_GLES/10)
#else
"GL4"
#endif
;
#undef FUG
TFX_INFO("TinyFX renderer: %s", glver);
tfx_printb(TFX_SEVERITY_INFO, "instancing", caps.instancing);
tfx_printb(TFX_SEVERITY_INFO, "compute", caps.compute);
tfx_printb(TFX_SEVERITY_INFO, "fp canvas", caps.float_canvas);
tfx_printb(TFX_SEVERITY_INFO, "multisample", caps.multisample);
}
// this is all definitely not the simplest way to deal with maps for uniform
// caches, but it's the simplest way I know which handles collisions.
#define TFX_HASHSIZE 101
typedef struct tfx_set {
struct tfx_set *next;
const char *key;
} tfx_set;
static unsigned tfx_hash(const char *s) {
unsigned hashval;
for (hashval = 0; *s != '\0'; s++)
hashval = *s + 31 * hashval;
return hashval % TFX_HASHSIZE;
}
static unsigned tfx_nohash(unsigned id) {
return id % TFX_HASHSIZE;
}
static bool tfx_slookup(tfx_set **hashtab, const char *s) {
#ifdef TFX_DEBUG
assert(s);
#endif
struct tfx_set *np;
for (np = hashtab[tfx_hash(s)]; np != NULL; np = np->next) {
if (strcmp(s, np->key) == 0) {
return true;
}
//TFX_WARN("collision\n");
}
return false;
}
static void tfx_sset(tfx_set **hashtab, const char *name) {
if (tfx_slookup(hashtab, name)) {
return;
}
unsigned hashval = tfx_hash(name);
tfx_set *np = malloc(sizeof(tfx_set));
np->key = name;
np->next = hashtab[hashval];
hashtab[hashval] = np;
}
static tfx_set **tfx_set_new() {
return calloc(sizeof(tfx_set*), TFX_HASHSIZE);
}
static void tfx_set_delete(tfx_set **hashtab) {
for (int i = 0; i < TFX_HASHSIZE; i++) {
if (hashtab[i] != NULL) {
free(hashtab[i]);
}
}
free(hashtab);
}
typedef struct tfx_locmap {
struct tfx_locmap *next;
const char *key;
GLuint value; // uniform location
} tfx_locmap;
static tfx_locmap *tfx_loclookup(tfx_locmap **hashtab, const char *s) {
#ifdef TFX_DEBUG
assert(s);
#endif
struct tfx_locmap *np;
for (np = hashtab[tfx_hash(s)]; np != NULL; np = np->next) {
if (strcmp(s, np->key) == 0) {
return np;
}
//TFX_WARN("collision\n");
}
return NULL;
}
static tfx_locmap* tfx_locset(tfx_locmap **hashtab, const char *name, GLuint value) {
tfx_locmap *found = tfx_loclookup(hashtab, name);
if (found) {
return NULL;
}
unsigned hashval = tfx_hash(name);
tfx_locmap *np = malloc(sizeof(tfx_locmap));
np->key = name;
np->next = hashtab[hashval];
np->value = value;
hashtab[hashval] = np;
return np;
}
static tfx_locmap **tfx_locmap_new() {
return calloc(sizeof(tfx_locmap*), TFX_HASHSIZE);
}
static void tfx_locmap_delete(tfx_locmap **hashtab) {
for (int i = 0; i < TFX_HASHSIZE; i++) {
if (hashtab[i] != NULL) {
free(hashtab[i]);
}
}
free(hashtab);
}
typedef struct tfx_shadermap {
struct tfx_shadermap *next;
GLint key; // shader program
tfx_locmap **value;
} tfx_shadermap;
static tfx_shadermap *tfx_proglookup(tfx_shadermap **hashtab, GLint program) {
#ifdef TFX_DEBUG
assert(program);
#endif
struct tfx_shadermap *np;
for (np = hashtab[tfx_nohash(program)]; np != NULL; np = np->next) {
if (program == np->key) {
return np;
}
//TFX_WARN("collision\n");
}
return NULL;
}
static tfx_shadermap* tfx_progset(tfx_shadermap **hashtab, GLint program) {
tfx_shadermap *found = tfx_proglookup(hashtab, program);
if (found) {
return found;
}
unsigned hashval = tfx_nohash(program);
tfx_shadermap *np = malloc(sizeof(tfx_shadermap));
np->key = program;
np->next = hashtab[hashval];
np->value = tfx_locmap_new();
hashtab[hashval] = np;
return np;
}
static tfx_shadermap **tfx_progmap_new() {
return calloc(sizeof(tfx_shadermap*), TFX_HASHSIZE);
}
static void tfx_progmap_delete(tfx_shadermap **hashtab) {
for (int i = 0; i < TFX_HASHSIZE; i++) {
if (hashtab[i] != NULL) {
tfx_locmap_delete(hashtab[i]->value);
free(hashtab[i]);
}
}
free(hashtab);
}
static tfx_buffer *g_buffers;
typedef struct tfx_frame_state {
// uniforms updated this frame
tfx_uniform *uniforms;
uint8_t *uniform_buffer;
uint8_t *ub_cursor;
tfx_shadermap **uniform_map;
tfx_view views[VIEW_MAX];
} tfx_frame_state;
static tfx_frame_state g_back; // staging update
/*
// TODO
static tfx_frame_state g_front; // processing update
void swap_state_buffer() {
tfx_frame_state tmp;
memcpy(&tmp, &g_back, sizeof(tfx_frame_state));
g_back = g_front;
g_front = tmp;
}
*/
static struct {
uint8_t *data;
uint32_t offset;
tfx_buffer buffers[TFX_TRANSIENT_BUFFER_COUNT];
} g_transient_buffer;
static tfx_caps g_caps;
// fallback printf
static void basic_log(const char *msg, tfx_severity level) {
#ifdef _MSC_VER
OutputDebugString(msg);
OutputDebugString("\n");
printf("%s\n", msg);
#else
printf("%s\n", msg);
#endif
}
static void tvb_reset() {
g_transient_buffer.offset = 0;
for (int i = 0; i < TFX_TRANSIENT_BUFFER_COUNT; i++) {
if (!g_transient_buffer.buffers[i].gl_id) {
GLuint id;
CHECK(tfx_glGenBuffers(1, &id));
CHECK(tfx_glBindBuffer(GL_ARRAY_BUFFER, id));
if (tfx_glBufferStorage) {
CHECK(tfx_glBufferStorage(GL_ARRAY_BUFFER, TFX_TRANSIENT_BUFFER_SIZE, NULL, GL_DYNAMIC_STORAGE_BIT | GL_MAP_WRITE_BIT));
}
else {
CHECK(tfx_glBufferData(GL_ARRAY_BUFFER, TFX_TRANSIENT_BUFFER_SIZE, NULL, GL_DYNAMIC_DRAW));
}
g_transient_buffer.buffers[i].gl_id = id;
}
}
}
void tfx_set_platform_data(tfx_platform_data pd) {
// supported: GL > 3, 2.1, ES 2.0, ES 3.0+
assert(0
|| (pd.context_version >= 30)
|| (pd.use_gles && pd.context_version == 20)
|| (!pd.use_gles && pd.context_version == 21)
);
if (pd.info_log == NULL) {
pd.info_log = &basic_log;
}
memcpy(&g_platform_data, &pd, sizeof(tfx_platform_data));
}
// null format = index buffer
tfx_transient_buffer tfx_transient_buffer_new(tfx_vertex_format *fmt, uint16_t num_verts) {
// transient index buffers aren't supported yet
assert(fmt != NULL);
assert(fmt->stride > 0);
tfx_transient_buffer buf;
memset(&buf, 0, sizeof(tfx_transient_buffer));
buf.data = g_transient_buffer.data + g_transient_buffer.offset;
buf.num = num_verts;
buf.offset = g_transient_buffer.offset;
uint32_t stride = sizeof(uint16_t);
if (fmt) {
buf.has_format = true;
buf.format = *fmt;
stride = (uint32_t)fmt->stride;
}
g_transient_buffer.offset += (uint32_t)(num_verts * stride);
g_transient_buffer.offset += g_transient_buffer.offset % 4; // align, in case the stride is weird
return buf;
}
// null format = available indices (uint16)
uint32_t tfx_transient_buffer_get_available(tfx_vertex_format *fmt) {
assert(fmt->stride > 0);
uint32_t avail = TFX_TRANSIENT_BUFFER_SIZE;
avail -= g_transient_buffer.offset;
uint32_t stride = sizeof(uint16_t);
if (fmt) {
stride = fmt->stride;
}
avail /= (uint32_t)stride;
return avail;
}
static tfx_program *g_programs = NULL;
static tfx_texture *g_textures = NULL;
static tfx_reset_flags g_flags = TFX_RESET_NONE;
static GLuint g_timers[TIMER_COUNT];
static int g_timer_offset = 0;
static bool use_timers = false;
static uint32_t *g_debug_data = NULL;
static tfx_program g_debug_program = 0;
static tfx_texture g_debug_overlay;
static tfx_uniform g_debug_texture;
static const char *g_debug_fss_legacy =
"in vec2 f_coord;\n"
"uniform sampler2D _tfx_texture;\n"
"void main() {\n"
" vec4 color = texture2D(_tfx_texture, vec2(f_coord.x, 1.0 - f_coord.y));\n"
" if (color.a < 0.01) discard;\n"
" gl_FragColor = vec4(color.rgb, 1.0) * color.a;\n"
"}\n"
;
static const char *g_debug_vss =
"in vec3 v_position;\n"
"out vec2 f_coord;\n"
"void main() {\n"