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xxGraphicGLES2.cpp
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xxGraphicGLES2.cpp
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//==============================================================================
// xxGraphic : OpenGL ES 2.0 Source
//
// Copyright (c) 2019-2024 TAiGA
// https://github.com/metarutaiga/xxGraphic
//==============================================================================
#undef GL_ES_VERSION_2_0
#define GL_ES_VERSION_3_0 0
#define GL_ES_VERSION_3_1 0
#define GL_ES_VERSION_3_2 0
#include "internal/xxGraphicInternalGL.h"
#include "xxGraphicGLES2.h"
#if defined(xxANDROID)
# include "xxGraphicEGL.h"
#endif
#if defined(xxIOS) && !defined(xxMACCATALYST)
# include "xxGraphicEAGL.h"
#endif
#if defined(xxMACOS)
# include "xxGraphicCGL.h"
#endif
#if defined(xxWINDOWS)
# include "xxGraphicWGL.h"
#endif
#ifndef GL_UNIFORM_BUFFER
#define GL_UNIFORM_BUFFER 0x8A11
#endif
//==============================================================================
// Instance
//==============================================================================
uint64_t xxCreateInstanceGLES2()
{
uint64_t instance = 0;
#if defined(xxANDROID)
instance = xxGraphicCreateEGL(200);
#endif
#if defined(xxMACOS)
instance = xxGraphicCreateCGL(200);
#endif
#if defined(xxIOS) && !defined(xxMACCATALYST)
instance = xxGraphicCreateEAGL(200);
#endif
#if defined(xxWINDOWS)
instance = xxGraphicCreateWGL(200);
#endif
if (instance == 0)
return 0;
xxRegisterFunction(GLES2);
return instance;
}
//------------------------------------------------------------------------------
void xxDestroyInstanceGLES2(uint64_t instance)
{
#if defined(xxANDROID)
xxGraphicDestroyEGL(instance);
#endif
#if defined(xxIOS) && !defined(xxMACCATALYST)
xxGraphicDestroyEAGL(instance);
#endif
#if defined(xxMACOS)
xxGraphicDestroyCGL(instance);
#endif
#if defined(xxWINDOWS)
xxGraphicDestroyWGL(instance);
#endif
xxUnregisterFunction();
}
//==============================================================================
// Device
//==============================================================================
uint64_t xxCreateDeviceGLES2(uint64_t instance)
{
xxLog("xxGraphic", "%s %s %s %s", glGetString(GL_VENDOR), glGetString(GL_RENDERER), glGetString(GL_VERSION), glGetString(GL_SHADING_LANGUAGE_VERSION));
return instance;
}
//------------------------------------------------------------------------------
void xxDestroyDeviceGLES2(uint64_t device)
{
}
//------------------------------------------------------------------------------
bool xxResetDeviceGLES2(uint64_t device)
{
return true;
}
//------------------------------------------------------------------------------
bool xxTestDeviceGLES2(uint64_t device)
{
return true;
}
//==============================================================================
// Framebuffer
//==============================================================================
//==============================================================================
// Swapchain
//==============================================================================
uint64_t xxCreateSwapchainGLES2(uint64_t device, uint64_t renderPass, void* view, int width, int height, uint64_t oldSwapchain)
{
GLSWAPCHAIN* glOldSwapchain = reinterpret_cast<GLSWAPCHAIN*>(oldSwapchain);
if (glOldSwapchain && glOldSwapchain->view == view && glOldSwapchain->width == width && glOldSwapchain->height == height)
return oldSwapchain;
GLSWAPCHAIN* glSwapchain = xxAlloc(GLSWAPCHAIN);
if (glSwapchain == nullptr)
return 0;
xxDestroySwapchainGLES2(oldSwapchain);
void* display = nullptr;
uint64_t context = glCreateContext(device, view, &display);
if (context == 0)
{
xxFree(glSwapchain);
return 0;
}
glSwapchain->context = context;
glSwapchain->view = view;
glSwapchain->display = display;
glSwapchain->width = width;
glSwapchain->height = height;
glSwapchain->scale = glGetScaleContext(glSwapchain->context, glSwapchain->view);
glSwapchain->pipeline = 0;
memset(glSwapchain->vertexBuffers, 0, sizeof(glSwapchain->vertexBuffers));
memset(glSwapchain->textureTargets, 0, sizeof(glSwapchain->textureTargets));
memset(glSwapchain->textureMipmaps, 0, sizeof(glSwapchain->textureMipmaps));
return reinterpret_cast<uint64_t>(glSwapchain);
}
//------------------------------------------------------------------------------
void xxDestroySwapchainGLES2(uint64_t swapchain)
{
GLSWAPCHAIN* glSwapchain = reinterpret_cast<GLSWAPCHAIN*>(swapchain);
if (glSwapchain == nullptr)
return;
glDestroyContext(glSwapchain->context, glSwapchain->view, glSwapchain->display);
xxFree(glSwapchain);
}
//------------------------------------------------------------------------------
void xxPresentSwapchainGLES2(uint64_t swapchain)
{
GLSWAPCHAIN* glSwapchain = reinterpret_cast<GLSWAPCHAIN*>(swapchain);
if (glSwapchain == nullptr)
return;
glPresentContext(glSwapchain->context, glSwapchain->display);
}
//------------------------------------------------------------------------------
uint64_t xxGetCommandBufferGLES2(uint64_t device, uint64_t swapchain)
{
GLSWAPCHAIN* glSwapchain = reinterpret_cast<GLSWAPCHAIN*>(swapchain);
if (glSwapchain == nullptr)
return 0;
glMakeCurrentContext(glSwapchain->context, glSwapchain->display);
glViewport(0, 0, glSwapchain->width, glSwapchain->height);
glScissor(0, 0, glSwapchain->width, glSwapchain->height);
glFrontFace(GL_CW);
glSwapchain->pipeline = 0;
memset(glSwapchain->vertexBuffers, 0, sizeof(glSwapchain->vertexBuffers));
memset(glSwapchain->textureTargets, 0, sizeof(glSwapchain->textureTargets));
memset(glSwapchain->textureMipmaps, 0, sizeof(glSwapchain->textureMipmaps));
return reinterpret_cast<uint64_t>(glSwapchain);
}
//------------------------------------------------------------------------------
uint64_t xxGetFramebufferGLES2(uint64_t device, uint64_t swapchain, float* scale)
{
GLSWAPCHAIN* glSwapchain = reinterpret_cast<GLSWAPCHAIN*>(swapchain);
if (scale)
{
float scaleFactor = glGetScaleContext(glSwapchain->context, glSwapchain->view);
if (glSwapchain->scale != scaleFactor)
{
glSwapchain->scale = scaleFactor;
glDestroyContext(glSwapchain->context, glSwapchain->view, glSwapchain->display);
glSwapchain->context = glCreateContext(device, glSwapchain->view, &glSwapchain->display);
}
(*scale) = scaleFactor;
}
return 0;
}
//==============================================================================
// Command Buffer
//==============================================================================
bool xxBeginCommandBufferGLES2(uint64_t commandBuffer)
{
return true;
}
//------------------------------------------------------------------------------
void xxEndCommandBufferGLES2(uint64_t commandBuffer)
{
}
//------------------------------------------------------------------------------
void xxSubmitCommandBufferGLES2(uint64_t commandBuffer, uint64_t swapchain)
{
}
//==============================================================================
// Render Pass
//==============================================================================
uint64_t xxCreateRenderPassGLES2(uint64_t device, bool clearColor, bool clearDepth, bool clearStencil, bool storeColor, bool storeDepth, bool storeStencil)
{
GLbitfield mask = 0;
if (clearColor)
mask |= GL_COLOR_BUFFER_BIT;
if (clearDepth)
mask |= GL_DEPTH_BUFFER_BIT;
if (clearStencil)
mask |= GL_STENCIL_BUFFER_BIT;
return mask;
}
//------------------------------------------------------------------------------
void xxDestroyRenderPassGLES2(uint64_t renderPass)
{
}
//------------------------------------------------------------------------------
uint64_t xxBeginRenderPassGLES2(uint64_t commandBuffer, uint64_t framebuffer, uint64_t renderPass, int width, int height, float color[4], float depth, unsigned char stencil)
{
GLbitfield mask = static_cast<GLbitfield>(renderPass);
if (mask)
{
if (mask & GL_COLOR_BUFFER_BIT)
{
glClearColor(color[0], color[1], color[2], color[3]);
}
if (mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
{
glDepthMask(true);
}
if (mask & GL_DEPTH_BUFFER_BIT)
{
glClearDepthf(depth);
}
if (mask & GL_STENCIL_BUFFER_BIT)
{
glClearStencil(stencil);
}
glViewport(0, 0, width, height);
glScissor(0, 0, width, height);
glClear(mask);
}
return commandBuffer;
}
//------------------------------------------------------------------------------
void xxEndRenderPassGLES2(uint64_t commandEncoder, uint64_t framebuffer, uint64_t renderPass)
{
}
//==============================================================================
// Vertex Attribute
//==============================================================================
uint64_t xxCreateVertexAttributeGLES2(uint64_t device, int count, int* attribute)
{
GLVERTEXATTRIBUTE* glVertexAttribute = xxAlloc(GLVERTEXATTRIBUTE);
if (glVertexAttribute == nullptr)
return 0;
GLVERTEXATTRIBUTE::Attribute* attributes = glVertexAttribute->attributes;
int normalIndex = 0;
int textureIndex = 0;
int stride = 0;
for (int i = 0; i < count; ++i)
{
int stream = (*attribute++);
int offset = (*attribute++);
int element = (*attribute++);
int size = (*attribute++);
stride += size;
attributes[i].index = i;
attributes[i].size = (element & 0xFF) - '0';
attributes[i].type = GL_FLOAT;
attributes[i].normalized = GL_FALSE;
attributes[i].stride = 0;
attributes[i].pointer = (char*)nullptr + offset;
attributes[i].stream = stream;
if (element == 'POS3' && size == sizeof(float) * 3)
{
attributes[i].name = "attrPosition";
continue;
}
if (element == 'BON3' && size == sizeof(float) * 3)
{
attributes[i].name = "attrBoneWeight";
continue;
}
if (element == 'BON4' && size == sizeof(char) * 4)
{
attributes[i].type = GL_UNSIGNED_BYTE;
attributes[i].name = "attrBoneIndices";
continue;
}
if (element == 'NOR3' && size == sizeof(float) * 3)
{
switch (normalIndex)
{
case 0: attributes[i].name = "attrNormal"; break;
case 1: attributes[i].name = "attrTangent"; break;
case 2: attributes[i].name = "attrBinormal"; break;
}
normalIndex++;
continue;
}
if (element == 'COL4' && size == sizeof(char) * 4)
{
#if defined(xxWINDOWS)
attributes[i].size = GL_BGRA_EXT;
#else
attributes[i].size = 4;
#endif
attributes[i].type = GL_UNSIGNED_BYTE;
attributes[i].normalized = GL_TRUE;
attributes[i].name = "attrColor";
continue;
}
if (element == 'TEX2' && size == sizeof(float) * 2)
{
switch (textureIndex)
{
case 0: attributes[i].name = "attrUV0"; break;
case 1: attributes[i].name = "attrUV1"; break;
case 2: attributes[i].name = "attrUV2"; break;
case 3: attributes[i].name = "attrUV3"; break;
case 4: attributes[i].name = "attrUV4"; break;
case 5: attributes[i].name = "attrUV5"; break;
case 6: attributes[i].name = "attrUV6"; break;
case 7: attributes[i].name = "attrUV7"; break;
}
textureIndex++;
continue;
}
}
for (int i = 0; i < count; ++i)
{
attributes[i].stride = stride;
}
glVertexAttribute->count = count;
return reinterpret_cast<uint64_t>(glVertexAttribute);
}
//------------------------------------------------------------------------------
void xxDestroyVertexAttributeGLES2(uint64_t vertexAttribute)
{
GLVERTEXATTRIBUTE* glVertexAttribute = reinterpret_cast<GLVERTEXATTRIBUTE*>(vertexAttribute);
xxFree(glVertexAttribute);
}
//==============================================================================
// Buffer
//==============================================================================
uint64_t xxCreateConstantBufferGLES2(uint64_t device, int size)
{
GLBUFFER* glBuffer = xxAlloc(GLBUFFER);
if (glBuffer == nullptr)
return 0;
glBuffer->type = GL_UNIFORM_BUFFER;
glBuffer->buffer = 0;
glBuffer->memory = xxAlloc(char, size);
glBuffer->size = size;
return reinterpret_cast<uint64_t>(glBuffer);
}
//------------------------------------------------------------------------------
uint64_t xxCreateIndexBufferGLES2(uint64_t device, int size)
{
GLBUFFER* glBuffer = xxAlloc(GLBUFFER);
if (glBuffer == nullptr)
return 0;
GLuint buffer = 0;
glGenBuffers(1, &buffer);
glBuffer->type = GL_ELEMENT_ARRAY_BUFFER;
glBuffer->buffer = buffer;
glBuffer->memory = xxAlloc(char, size);
glBuffer->size = size;
return reinterpret_cast<uint64_t>(glBuffer);
}
//------------------------------------------------------------------------------
uint64_t xxCreateVertexBufferGLES2(uint64_t device, int size, uint64_t vertexAttribute)
{
GLBUFFER* glBuffer = xxAlloc(GLBUFFER);
if (glBuffer == nullptr)
return 0;
GLuint buffer = 0;
glGenBuffers(1, &buffer);
glBuffer->type = GL_ARRAY_BUFFER;
glBuffer->buffer = buffer;
glBuffer->memory = xxAlloc(char, size);
glBuffer->size = size;
return reinterpret_cast<uint64_t>(glBuffer);
}
//------------------------------------------------------------------------------
void xxDestroyBufferGLES2(uint64_t device, uint64_t buffer)
{
GLBUFFER* glBuffer = reinterpret_cast<GLBUFFER*>(buffer);
if (glBuffer == nullptr)
return;
if (glBuffer->buffer)
glDeleteBuffers(1, &glBuffer->buffer);
xxFree(glBuffer->memory);
xxFree(glBuffer);
}
//------------------------------------------------------------------------------
void* xxMapBufferGLES2(uint64_t device, uint64_t buffer)
{
GLBUFFER* glBuffer = reinterpret_cast<GLBUFFER*>(buffer);
if (glBuffer == nullptr)
return nullptr;
return glBuffer->memory;
}
//------------------------------------------------------------------------------
void xxUnmapBufferGLES2(uint64_t device, uint64_t buffer)
{
GLBUFFER* glBuffer = reinterpret_cast<GLBUFFER*>(buffer);
if (glBuffer == nullptr)
return;
if (glBuffer->type == GL_UNIFORM_BUFFER)
return;
glBindBuffer(glBuffer->type, glBuffer->buffer);
glBufferData(glBuffer->type, glBuffer->size, glBuffer->memory, GL_STREAM_DRAW);
}
//==============================================================================
// Texture
//==============================================================================
uint64_t xxCreateTextureGLES2(uint64_t device, uint64_t format, int width, int height, int depth, int mipmap, int array, void const* external)
{
if (width == 0 || height == 0 || depth == 0 || mipmap == 0 || array == 0)
return 0;
GLTEXTURE* glTexture = xxAlloc(GLTEXTURE);
if (glTexture == nullptr)
return 0;
GLuint texture = 0;
glGenTextures(1, &texture);
if (texture == 0)
{
xxFree(glTexture);
return 0;
}
struct { GLenum pixelFormat; GLenum pixelType; int onePixel; int stride; } T;
switch (format)
{
case "RGB565"_CC: T = { GL_RGB, GL_UNSIGNED_SHORT_5_6_5_REV, 2, width * 2 }; break;
case "BGR565"_CC: T = { GL_RGB, GL_UNSIGNED_SHORT_5_6_5, 2, width * 2 }; break;
case "ARGB1555"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_SHORT_5_5_5_1, 2, width * 2 }; break;
case "ABGR1555"_CC: T = { GL_RGBA, GL_UNSIGNED_SHORT_5_5_5_1, 2, width * 2 }; break;
case "ARGB4444"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4, 2, width * 2 }; break;
case "ABGR4444"_CC: T = { GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4, 2, width * 2 }; break;
case "RGBA4444"_CC: T = { GL_RGBA, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, 2, width * 2 }; break;
case "BGRA4444"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT, 2, width * 2 }; break;
case "RGBA5551"_CC: T = { GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, 2, width * 2 }; break;
case "BGRA5551"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT, 2, width * 2 }; break;
case "ARGB8888"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_INT_8_8_8_8, 4, width * 4 }; break;
case "RGBA8888"_CC: T = { GL_RGBA, GL_UNSIGNED_BYTE, 4, width * 4 }; break;
case "ABGR8888"_CC: T = { GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, 4, width * 4 }; break;
case "BGRA8888"_CC: T = { GL_BGRA_EXT, GL_UNSIGNED_BYTE, 4, width * 4 }; break;
case "DS24"_cc: T = { GL_DEPTH_STENCIL_OES, GL_DEPTH24_STENCIL8_OES, 4, width * 4 }; break;
case "BC1"_cc:
case "DXT1"_cc: T = { 0, GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 8, (width + 3) / 4 * 8 }; break;
case "BC2"_cc:
case "DXT3"_cc: T = { 0, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 16, (width + 3) / 4 * 16 }; break;
case "BC3"_cc:
case "DXT5"_cc: T = { 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 16, (width + 3) / 4 * 16 }; break;
case "BC4S"_cc: T = { 0, GL_COMPRESSED_SIGNED_RED_RGTC1_EXT, 8, (width + 3) / 4 * 8 }; break;
case "BC4U"_cc:
case "ATI1"_cc: T = { 0, GL_COMPRESSED_RED_RGTC1_EXT, 8, (width + 3) / 4 * 8 }; break;
case "BC5S"_cc: T = { 0, GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT, 16, (width + 3) / 4 * 16 }; break;
case "BC5U"_cc:
case "ATI2"_cc: T = { 0, GL_COMPRESSED_RED_GREEN_RGTC2_EXT, 16, (width + 3) / 4 * 16 }; break;
case "BC6H"_cc: T = { 0, GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT, 16, (width + 3) / 4 * 16 }; break;
case "BC7"_cc: T = { 0, GL_COMPRESSED_RGBA_BPTC_UNORM_EXT, 16, (width + 3) / 4 * 16 }; break;
default:
xxLog("xxGraphic", "Unknown format (%.8s)", &format);
return 0;
}
glTexture->texture = texture;
glTexture->target = 0;
glTexture->format = T.pixelFormat;
glTexture->type = T.pixelType;
glTexture->memory = nullptr;
glTexture->width = width;
glTexture->height = height;
glTexture->depth = depth;
glTexture->mipmap = mipmap;
glTexture->array = array;
glTexture->external = external;
glTexture->image = nullptr;
glTexture->device = nullptr;
for (int i = 0; i < mipmap; ++i)
{
glTexture->strides[i] = (T.stride >> i);
if (glTexture->strides[i] < T.onePixel)
glTexture->strides[i] = T.onePixel;
}
GLuint externalTexture = static_cast<GLuint>(reinterpret_cast<size_t>(external));
if (glIsTexture(externalTexture))
{
glDeleteTextures(1, &texture);
glTexture->texture = externalTexture;
glTexture->target = GL_TEXTURE_2D;
glTexture->external = external;
external = nullptr;
}
if (external)
{
#if defined(xxANDROID)
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexture->target = GL_TEXTURE_2D;
glTexture->image = xxCreateImageFromHardwareBuffer(external);
xxBindTextureWithImage(glTexture->image);
#elif defined(xxMACOS)
glBindTexture(GL_TEXTURE_RECTANGLE_ARB, texture);
glTexParameterf(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexture->target = GL_TEXTURE_RECTANGLE_ARB;
xxBindTextureWithSurface(glTexture->external);
#elif defined(xxMACCATALYST)
#elif defined(xxIOS)
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexture->target = GL_TEXTURE_2D;
xxBindTextureWithSurface(glTexture->external);
#elif defined(xxWINDOWS)
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexture->target = GL_TEXTURE_2D;
glTexture->device = xxGetDeviceFromDirect3DTexture(external);
glTexture->image = xxCreateImageFromDirect3DTexture(glTexture->device, external, texture);
#endif
}
return reinterpret_cast<uint64_t>(glTexture);
}
//------------------------------------------------------------------------------
void xxDestroyTextureGLES2(uint64_t texture)
{
GLTEXTURE* glTexture = reinterpret_cast<GLTEXTURE*>(texture);
if (glTexture == nullptr)
return;
GLuint externalTexture = static_cast<GLuint>(reinterpret_cast<size_t>(glTexture->external));
if (glTexture->texture == externalTexture)
{
glTexture->texture = 0;
}
if (glTexture->image)
{
#if defined(xxANDROID)
xxDestroyImage(glTexture->image);
#elif defined(xxWINDOWS)
xxDestroyImage(glTexture->device, glTexture->image);
#endif
}
if (glTexture->texture)
{
glDeleteTextures(1, &glTexture->texture);
}
xxFree(glTexture->memory);
xxFree(glTexture);
}
//------------------------------------------------------------------------------
void* xxMapTextureGLES2(uint64_t device, uint64_t texture, int* stride, int level, int array)
{
GLTEXTURE* glTexture = reinterpret_cast<GLTEXTURE*>(texture);
if (glTexture == nullptr)
return nullptr;
#if defined(xxANDROID)
if (glTexture->image)
return nullptr;
#endif
unsigned int height = glTexture->height >> level;
unsigned int depth = glTexture->depth >> level;
if (height == 0)
height = 1;
if (depth == 0)
depth = 1;
glTexture->memory = xxRealloc(glTexture->memory, char, glTexture->strides[level] * height * depth);
(*stride) = glTexture->strides[level];
return glTexture->memory;
}
//------------------------------------------------------------------------------
void xxUnmapTextureGLES2(uint64_t device, uint64_t texture, int level, int array)
{
GLTEXTURE* glTexture = reinterpret_cast<GLTEXTURE*>(texture);
if (glTexture == nullptr)
return;
#if defined(xxANDROID)
if (glTexture->image)
return;
#endif
unsigned int width = glTexture->width >> level;
unsigned int height = glTexture->height >> level;
unsigned int depth = glTexture->depth >> level;
if (width == 0)
width = 1;
if (height == 0)
height = 1;
if (depth == 0)
depth = 1;
if (glTexture->depth == 1 && glTexture->array == 1)
{
glBindTexture(GL_TEXTURE_2D, glTexture->texture);
if (glTexture->target == 0)
{
glTexture->target = GL_TEXTURE_2D;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glTexture->mipmap > 1 ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
}
switch (glTexture->format)
{
case GL_RGB:
glTexImage2D(GL_TEXTURE_2D, level, GL_RGB, width, height, 0, glTexture->format, glTexture->type, glTexture->memory);
break;
case GL_RGBA:
case GL_BGRA_EXT:
glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, width, height, 0, glTexture->format, glTexture->type, glTexture->memory);
break;
case GL_DEPTH24_STENCIL8_OES:
glTexImage2D(GL_TEXTURE_2D, level, GL_DEPTH_STENCIL_OES, width, height, 0, glTexture->format, glTexture->type, glTexture->memory);
break;
case 0:
GLsizei imageSize = glTexture->strides[level] * ((height + 3) / 4);
glCompressedTexImage2D(GL_TEXTURE_2D, level, glTexture->type, width, height, 0, imageSize, glTexture->memory);
break;
}
glBindTexture(GL_TEXTURE_2D, 0);
}
if (glTexture->width == glTexture->height && glTexture->depth == 1 && glTexture->array == 6)
{
glBindTexture(GL_TEXTURE_CUBE_MAP, glTexture->texture);
if (glTexture->target == 0)
{
glTexture->target = GL_TEXTURE_CUBE_MAP;
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MIN_FILTER, glTexture->mipmap > 1 ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR);
}
switch (glTexture->format)
{
case GL_RGB:
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + array, level, GL_RGB, width, height, 0, glTexture->format, glTexture->type, glTexture->memory);
break;
case GL_RGBA:
case GL_BGRA_EXT:
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + array, level, GL_RGBA, width, height, 0, glTexture->format, glTexture->type, glTexture->memory);
break;
case 0:
GLsizei imageSize = glTexture->strides[level] * ((height + 3) / 4);
glCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + array, level, glTexture->type, width, height, 0, imageSize, glTexture->memory);
break;
}
glBindTexture(GL_TEXTURE_CUBE_MAP, 0);
}
if (glTexture->mipmap == level + 1)
{
xxFree(glTexture->memory);
glTexture->memory = nullptr;
}
}
//==============================================================================
// Sampler
//==============================================================================
uint64_t xxCreateSamplerGLES2(uint64_t device, bool clampU, bool clampV, bool clampW, bool linearMag, bool linearMin, bool linearMip, int anisotropy)
{
GLSAMPLER glSampler = {};
glSampler.addressU = clampU;
glSampler.addressV = clampV;
glSampler.addressW = clampW;
glSampler.magFilter = linearMag;
glSampler.minFilter = linearMin;
glSampler.mipFilter = linearMip;
glSampler.anisotropy = anisotropy;
return static_cast<uint64_t>(glSampler.value);
}
//------------------------------------------------------------------------------
void xxDestroySamplerGLES2(uint64_t sampler)
{
}
//==============================================================================
// Shader
//==============================================================================
static void checkShader(GLuint glShader, char const* shader)
{
GLint status = 0;
glGetShaderiv(glShader, GL_COMPILE_STATUS, &status);
if (status == GL_FALSE)
{
xxLog("xxGraphic", "failed to compile %d", glShader);
char* dup = strdup(shader);
if (dup)
{
int index = 0;
char* lasts = dup;
char* line = strsep(&lasts, "\r\n");
while (line)
{
xxLog("xxGraphic", "%d : %s", index++, line);
line = strsep(&lasts, "\r\n");
}
free(dup);
}
GLint length = 0;
glGetShaderiv(glShader, GL_INFO_LOG_LENGTH, &length);
char* log = xxAlloc(char, length + 1);
if (log)
{
glGetShaderInfoLog(glShader, length, nullptr, log);
log[length] = '\0';
char* lasts = log;
char* line = strsep(&lasts, "\r\n");
while (line)
{
xxLog("xxGraphic", "%s", line);
line = strsep(&lasts, "\r\n");
}
xxFree(log);
}
}
}
//------------------------------------------------------------------------------
uint64_t xxCreateVertexShaderGLES2(uint64_t device, char const* shader, uint64_t vertexAttribute)
{
static char const* const macro[][2] =
{
{ "SHADER_GLSL", "1" },
{ "SHADER_VERTEX", "1" },
{ "uniBuffer", "uniBufferVS" },
{ "uniform", "uniform highp" },
{ "attribute", "attribute" },
{ "varying", "varying" },
};
constexpr size_t size = xxCountOf(macro);
if (strcmp(shader, "default") == 0)
{
shader = glDefaultShaderCode;
}
GLsizei count = 0;
char const* sources[2 + size * 6 + 2 + 1];
sources[count++] = "#version 100";
sources[count++] = "\n";
for (size_t i = 0; i < size; ++i)
{
sources[count++] = "#define";
sources[count++] = " ";
sources[count++] = macro[i][0];
sources[count++] = " ";
sources[count++] = macro[i][1];
sources[count++] = "\n";
}
sources[count++] = "precision highp float;";
sources[count++] = "\n";
sources[count++] = shader;
GLuint glShader = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(glShader, count, sources, nullptr);
glCompileShader(glShader);
checkShader(glShader, shader);
return static_cast<uint64_t>(glShader);
}
//------------------------------------------------------------------------------
uint64_t xxCreateFragmentShaderGLES2(uint64_t device, char const* shader)
{
static char const* const macro[][2] =
{
{ "SHADER_GLSL", "1" },
{ "SHADER_FRAGMENT", "1" },
{ "uniBuffer", "uniBufferFS" },
{ "uniform", "uniform highp" },
{ "attribute", "" },
{ "varying", "varying" },
};
constexpr size_t size = xxCountOf(macro);
if (strcmp(shader, "default") == 0)
{
shader = glDefaultShaderCode;
}
GLsizei count = 0;
char const* sources[2 + size * 6 + 2 + 1];
sources[count++] = "#version 100";
sources[count++] = "\n";
for (size_t i = 0; i < size; ++i)
{
sources[count++] = "#define";
sources[count++] = " ";
sources[count++] = macro[i][0];
sources[count++] = " ";
sources[count++] = macro[i][1];
sources[count++] = "\n";
}
sources[count++] = "precision mediump float;";
sources[count++] = "\n";
sources[count++] = shader;
GLuint glShader = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(glShader, count, sources, nullptr);
glCompileShader(glShader);
checkShader(glShader, shader);
return static_cast<uint64_t>(glShader);
}
//------------------------------------------------------------------------------
void xxDestroyShaderGLES2(uint64_t device, uint64_t shader)
{
GLuint glShader = static_cast<GLuint>(shader);
if (glShader == 0)
return;
glDeleteShader(glShader);
}
//==============================================================================
// Pipeline
//==============================================================================
static void checkProgram(GLuint glProgram)
{
GLint status = 0;
glGetProgramiv(glProgram, GL_LINK_STATUS, &status);
if (status == GL_FALSE)
{
xxLog("xxGraphic", "failed to link %u", glProgram);
GLint length = 0;
glGetProgramiv(glProgram, GL_INFO_LOG_LENGTH, &length);
char* log = xxAlloc(char, length + 1);
if (log)
{
glGetProgramInfoLog(glProgram, length, nullptr, log);
log[length] = '\0';
char* lasts = log;
char* line = strsep(&lasts, "\r\n");
while (line)
{
xxLog("xxGraphic", "%s", line);
line = strsep(&lasts, "\r\n");
}
xxFree(log);
}
}
}
//------------------------------------------------------------------------------
uint64_t xxCreateBlendStateGLES2(uint64_t device, char const* sourceColor, char const* operationColor, char const* destinationColor, char const* sourceAlpha, char const* operationAlpha, char const* destinationAlpha)
{
GLBLEND* glBlend = xxAlloc(GLBLEND);
if (glBlend == nullptr)
return 0;
glBlend->blendSourceColor = glBlendFactor(sourceColor);
glBlend->blendFunctionColor = glBlendOp(operationColor);
glBlend->blendDestinationColor = glBlendFactor(destinationColor);
glBlend->blendSourceAlpha = glBlendFactor(sourceAlpha);
glBlend->blendFunctionAlpha = glBlendOp(operationAlpha);
glBlend->blendDestinationAlpha = glBlendFactor(destinationAlpha);
glBlend->blendEnable = (glBlend->blendSourceColor != GL_ONE ||
glBlend->blendFunctionColor != GL_ZERO ||
glBlend->blendDestinationColor != GL_FUNC_ADD ||
glBlend->blendSourceAlpha != GL_ONE ||
glBlend->blendFunctionAlpha != GL_FUNC_ADD ||
glBlend->blendDestinationAlpha != GL_FUNC_ADD) ? GL_TRUE : GL_FALSE;
return reinterpret_cast<uint64_t>(glBlend);
}
//------------------------------------------------------------------------------
uint64_t xxCreateDepthStencilStateGLES2(uint64_t device, char const* depthTest, bool depthWrite)
{
GLSTATE glState = {};
glState.depthTest = glCompareOp(depthTest);
glState.depthWrite = depthWrite;
return static_cast<uint64_t>(glState.value);
}
//------------------------------------------------------------------------------
uint64_t xxCreateRasterizerStateGLES2(uint64_t device, bool cull, bool scissor)
{
GLSTATE glState = {};
glState.cull = cull;
glState.scissor = scissor;
return static_cast<uint64_t>(glState.value);
}
//------------------------------------------------------------------------------
uint64_t xxCreatePipelineGLES2(uint64_t device, uint64_t renderPass, uint64_t blendState, uint64_t depthStencilState, uint64_t rasterizerState, uint64_t vertexAttribute, uint64_t vertexShader, uint64_t fragmentShader)
{
GLVERTEXATTRIBUTE* glVertexAttribute = reinterpret_cast<GLVERTEXATTRIBUTE*>(vertexAttribute);
if (glVertexAttribute == nullptr)
return 0;
GLPIPELINE* glPipeline = xxAlloc(GLPIPELINE);
if (glPipeline == nullptr)
return 0;
GLBLEND* glBlendState = reinterpret_cast<GLBLEND*>(blendState);
GLSTATE glDepthStencilState = { depthStencilState };
GLSTATE glRasterizerState = { rasterizerState };
GLuint glProgram = glCreateProgram();
GLVERTEXATTRIBUTE::Attribute* attributes = glVertexAttribute->attributes;
for (int i = 0; i < glVertexAttribute->count; ++i)
{
GLVERTEXATTRIBUTE::Attribute& attribute = attributes[i];
glBindAttribLocation(glProgram, attribute.index, attribute.name);
}
GLuint glVertexShader = static_cast<GLuint>(vertexShader);
GLuint glFragmentShader = static_cast<GLuint>(fragmentShader);
glAttachShader(glProgram, glVertexShader);
glAttachShader(glProgram, glFragmentShader);
glLinkProgram(glProgram);
checkProgram(glProgram);
glPipeline->program = glProgram;
glPipeline->vertexAttribute = glVertexAttribute;
glPipeline->texture = glGetUniformLocation(glProgram, "samDiffuse");
glPipeline->uniformVS = glGetUniformLocation(glProgram, "uniBufferVS");
glPipeline->uniformFS = glGetUniformLocation(glProgram, "uniBufferFS");
glPipeline->blend = glBlendState ? (*glBlendState) : GLBLEND{ .blendEnable = GL_FALSE };
glPipeline->state.depthTest = glDepthStencilState.depthTest;
glPipeline->state.depthWrite = glDepthStencilState.depthWrite;
glPipeline->state.cull = glRasterizerState.cull;