/* \brief initialize */
GLHCKAPI glhckContext* glhckContextCreate(int argc, char **argv)
{
glhckContext *ctx, *oldCtx;
#ifndef _GLHCK_TLS_FOUND
fprintf(stderr, "-!- Thread-local storage support in compiler was not detected.\n");
fprintf(stderr, "-!- Using multiple glhck contextes in different threads may cause unexpected behaviour.\n");
fprintf(stderr, "-!- If your compiler supports TLS, file a bug report!\n");
#endif
/* allocate glhck context */
if (!(ctx = calloc(1, sizeof(glhckContext))))
return NULL;
/* swap current context until init done */
oldCtx = glhckContextGet();
glhckContextSet(ctx);
/* enable color by default */
glhckLogColor(1);
/* FIXME: change the signal calls in these functions to sigaction's */
#ifndef NDEBUG
/* set FPE handler */
_glhckSetupFPE();
/* setup backtrace handler
* make this optional.. */
_glhckSetBacktrace();
#endif
#if !GLHCK_DISABLE_TRACE
/* init trace system */
_glhckTraceInit(argc, (const char**)argv);
#endif
/* setup internal vertex/index types */
_glhckGeometryInit();
/* set default global precision for glhck to use with geometry
* NOTE: _NONE means that glhck and importers choose the best precision. */
glhckSetGlobalPrecision(GLHCK_IDX_AUTO, GLHCK_IDX_AUTO);
/* pre-allocate render queues */
GLHCKRD()->objects.queue = _glhckMalloc(GLHCK_QUEUE_ALLOC_STEP * sizeof(_glhckObject*));
GLHCKRD()->objects.allocated += GLHCK_QUEUE_ALLOC_STEP;
GLHCKRD()->textures.queue = _glhckMalloc(GLHCK_QUEUE_ALLOC_STEP * sizeof(_glhckTexture*));
GLHCKRD()->textures.allocated += GLHCK_QUEUE_ALLOC_STEP;
/* switch back to old context, if there was one */
if (oldCtx) glhckContextSet(oldCtx);
return ctx;
}
/* \brief check if file is TGA */
int _glhckFormatTGA(const char *file)
{
FILE *f;
void *data = NULL;
char isTga = 0;
size_t size;
tga_header *header;
tga_footer *footer;
CALL(0, "%s", file);
if (!(f = fopen(file, "rb")))
goto read_fail;
fseek(f, 0L, SEEK_END);
if ((size = ftell(f)) < sizeof(tga_header) + sizeof(tga_footer))
goto fail;
if (!(data = _glhckMalloc(size)))
goto out_of_memory;
fseek(f, 0L, SEEK_SET);
if (fread(data, 1, size, f) != size)
goto fail;
/* we don't need the file anymore */
NULLDO(fclose, f);
header = (tga_header*)data;
footer = (tga_footer*)((char*)data+size-sizeof(tga_footer));
/* is TGA v2.0? (stop storing the headers at EOF please) */
if (!memcmp(footer->signature, TGA_SIGNATURE, sizeof(footer->signature)))
isTga = 1;
else if ((header->bpp == 32) || (header->bpp == 24) || (header->bpp == 8))
isTga = 1;
NULLDO(_glhckFree, data);
RET(0, "%d", isTga?RETURN_OK:RETURN_FAIL);
return isTga?RETURN_OK:RETURN_FAIL;
read_fail:
DEBUG(GLHCK_DBG_ERROR, "Failed to open: %s", file);
goto fail;
out_of_memory:
DEBUG(GLHCK_DBG_ERROR, "Out of memory, won't load file: %s", file);
fail:
IFDO(fclose, f);
IFDO(_glhckFree, data);
return RETURN_FAIL;
}
/* \brief push current render state to stack */
GLHCKAPI void glhckRenderStatePush(void)
{
__GLHCKrenderState *state;
GLHCK_INITIALIZED();
TRACE(2);
if (!(state = _glhckMalloc(sizeof(__GLHCKrenderState))))
return;
memcpy(&state->pass, &GLHCKR()->pass, sizeof(__GLHCKrenderPass));
memcpy(&state->view, &GLHCKRD()->view, sizeof(__GLHCKrenderView));
state->width = GLHCKR()->width; state->height = GLHCKR()->height;
state->next = GLHCKR()->stack;
GLHCKR()->stack = state;
}
/* \brief use browser to load images, may support more formats than glhck */
int _glhckImportEmscripten(const char *file, _glhckImportImageStruct *import)
{
unsigned int i, i2;
unsigned char *importData = NULL, hasa = 0;
SDL_Surface* surface = NULL;
glhckTextureFormat format;
CALL(0, "%s, %p", file, import);
if (!(surface = IMG_Load(file)))
goto fail;
if (surface->format->BytesPerPixel == 4) {
hasa = 1;
if (surface->format->Rmask == 0x000000ff) format = GLHCK_RGBA;
else format = GLHCK_BGRA;
} else if (surface->format->BytesPerPixel == 3) {
if (surface->format->Rmask == 0x000000ff) format = GLHCK_RGB;
else format = GLHCK_BGR;
} else {
goto not_truecolor;
}
if (!(importData = _glhckMalloc(surface->w * surface->h * 4)))
goto fail;
memcpy(importData, surface->pixels, surface->w * surface->h * 4);
_glhckInvertPixels(importData, surface->w, surface->h, surface->format->BytesPerPixel);
import->width = surface->w;
import->height = surface->h;
import->data = importData;
import->format = format;
import->type = GLHCK_UNSIGNED_BYTE;
import->flags |= (hasa?GLHCK_TEXTURE_IMPORT_ALPHA:0);
SDL_FreeSurface(surface);
RET(0, "%d", RETURN_OK);
return RETURN_OK;
not_truecolor:
DEBUG(GLHCK_DBG_ERROR, "SDL_Surface not truecolor, will bail out!");
fail:
IFDO(SDL_FreeSurface, surface);
IFDO(_glhckFree, importData);
RET(0, "%d", RETURN_FAIL);
return RETURN_FAIL;
}
/* \brief return tristripped indecies for triangle index data */
glhckImportIndexData* _glhckTriStrip(const glhckImportIndexData *indices, unsigned int memb, unsigned int *outMemb)
{
#if !GLHCK_TRISTRIP
(void)indices;
(void)memb;
(void)outMemb;
/* stripping is disabled.
* importers should fallback to GLHCK_TRIANGLES */
return NULL;
#else
int prim;
glhckImportIndexData v1, v2, v3;
glhckImportIndexData *outIndices = NULL, *newIndices = NULL;
unsigned int i, primCount, tmp;
ACTCData *tc = NULL;
CALL(0, "%p, %u, %p", indices, memb, outMemb);
/* check if the triangles we got are valid */
if (memb % 3 != 0)
goto not_valid;
if (!(outIndices = _glhckMalloc(memb * sizeof(glhckImportIndexData))))
goto out_of_memory;
if (!(tc = actcNew()))
goto actc_fail;
/* parameters */
ACTC_CALL(actcParami(tc, ACTC_OUT_MIN_FAN_VERTS, INT_MAX));
ACTC_CALL(actcParami(tc, ACTC_OUT_HONOR_WINDING, ACTC_FALSE));
/* input data */
ACTC_CALL(actcBeginInput(tc));
for (i = 0; i != memb; i+=3) {
ACTC_CALL(actcAddTriangle(tc,
indices[i+0],
indices[i+1],
indices[i+2]));
}
ACTC_CALL(actcEndInput(tc));
/* FIXME: fix the winding of generated stiched strips */
/* output data */
tmp = memb, i = 0, primCount = 0;
unsigned int flipStart = 0, length = 0;
ACTC_CALL(actcBeginOutput(tc));
while ((prim = actcStartNextPrim(tc, &v1, &v2)) != ACTC_DATABASE_EMPTY) {
assert(prim == ACTC_PRIM_STRIP);
if (i + (primCount?5:3) > memb)
goto no_profit;
/* degenerate to next strip */
if (primCount && v1 != v3) {
if (length & 1) {
_glhckTriStripReverse(&outIndices[flipStart], i-flipStart);
if (flipStart) outIndices[flipStart-1] = outIndices[flipStart];
}
v3 = outIndices[i-1];
if (v1 != v3) {
outIndices[i++] = v3;
outIndices[i++] = v1;
}
flipStart = i;
}
length = 0;
outIndices[i++] = v1;
outIndices[i++] = v2;
while (actcGetNextVert(tc, &v3) != ACTC_PRIM_COMPLETE) {
if (i + 1 > memb)
goto no_profit;
outIndices[i++] = v3;
++length;
}
primCount++;
}
ACTC_CALL(actcEndOutput(tc));
puts("");
printf("%u alloc\n", memb);
if (outMemb) *outMemb = i;
memb = tmp;
// for (i = *outMemb-12; i != *outMemb; ++i)
// outIndices[i] = 0;
#if 0
puts("- INDICES:");
for (i = 0; i != *outMemb; ++i)
printf("%u%s", outIndices[i], (!((i+1) % 3)?"\n":", "));
puts("");
#endif
if (!(newIndices = _glhckRealloc(outIndices, memb, i, sizeof(glhckImportIndexData))))
goto out_of_memory;
outIndices = newIndices;
printf("%u indices\n", memb);
printf("%u out indicies\n", i);
printf("%u tristrips\n", primCount);
printf("%u profit\n", memb - i);
actcDelete(tc);
RET(0, "%p", outIndices);
return outIndices;
not_valid:
DEBUG(GLHCK_DBG_ERROR, "Tristripper: not valid triangle indices");
goto fail;
out_of_memory:
DEBUG(GLHCK_DBG_ERROR, "Tristripper: out of memory");
goto fail;
actc_fail:
DEBUG(GLHCK_DBG_ERROR, "Tristripper: init failed");
goto fail;
no_profit:
DEBUG(GLHCK_DBG_CRAP, "Tripstripper: no profit from stripping, fallback to triangles");
fail:
IFDO(actcDelete, tc);
IFDO(_glhckFree, outIndices);
RET(0, "%p", NULL);
return NULL;
#endif
}
/* \brief import MikuMikuDance PMD file */
int _glhckImportPMD(_glhckObject *object, const char *file, const glhckImportModelParameters *params,
glhckGeometryIndexType itype, glhckGeometryVertexType vtype)
{
FILE *f;
char *texturePath;
mmd_data *mmd = NULL;
glhckAtlas *atlas = NULL;
glhckMaterial *material = NULL;
glhckTexture *texture = NULL, **textureList = NULL;
glhckImportVertexData *vertexData = NULL;
glhckImportIndexData *indices = NULL, *stripIndices = NULL;
unsigned int geometryType = GLHCK_TRIANGLE_STRIP;
unsigned int i, i2, ix, start, numFaces, numIndices = 0;
CALL(0, "%p, %s, %p", object, file, params);
if (!(f = fopen(file, "rb")))
goto read_fail;
if (!(mmd = mmd_new(f)))
goto mmd_no_memory;
if (mmd_read_header(mmd) != 0)
goto mmd_import_fail;
if (mmd_read_vertex_data(mmd) != 0)
goto mmd_import_fail;
if (mmd_read_index_data(mmd) != 0)
goto mmd_import_fail;
if (mmd_read_material_data(mmd) != 0)
goto mmd_import_fail;
/* close file */
NULLDO(fclose, f);
if (mmd->header.name) {
DEBUG(GLHCK_DBG_CRAP, "%s\n", mmd->header.name);
}
if (mmd->header.comment) printf("%s\n\n", mmd->header.comment);
if (!(vertexData = _glhckCalloc(mmd->num_vertices, sizeof(glhckImportVertexData))))
goto mmd_no_memory;
if (!(indices = _glhckMalloc(mmd->num_indices * sizeof(unsigned int))))
goto mmd_no_memory;
if (!(textureList = _glhckCalloc(mmd->num_materials, sizeof(_glhckTexture*))))
goto mmd_no_memory;
if (!(atlas = glhckAtlasNew()))
goto mmd_no_memory;
/* add all textures to atlas packer */
for (i = 0; i < mmd->num_materials; ++i) {
if (!mmd->materials[i].texture) continue;
if (!(texturePath = _glhckImportTexturePath(mmd->materials[i].texture, file)))
continue;
if ((texture = glhckTextureNewFromFile(texturePath, NULL, NULL))) {
glhckAtlasInsertTexture(atlas, texture);
glhckTextureFree(texture);
textureList[i] = texture;
}
_glhckFree(texturePath);
}
for (i = 0; i < mmd->num_materials && !textureList[i]; ++i);
if (i >= mmd->num_materials) {
/* no textures found */
NULLDO(glhckAtlasFree, atlas);
NULLDO(_glhckFree, textureList);
} else {
/* pack textures */
if (glhckAtlasPack(atlas, GLHCK_RGBA, 1, 0, glhckTextureDefaultParameters()) != RETURN_OK)
goto fail;
}
/* assign data */
for (i = 0, start = 0; i < mmd->num_materials; ++i, start += numFaces) {
numFaces = mmd->materials[i].face;
for (i2 = start; i2 < start + numFaces; ++i2) {
ix = mmd->indices[i2];
/* vertices */
vertexData[ix].vertex.x = mmd->vertices[ix*3+0];
vertexData[ix].vertex.y = mmd->vertices[ix*3+1];
vertexData[ix].vertex.z = mmd->vertices[ix*3+2];
/* normals */
vertexData[ix].normal.x = mmd->normals[ix*3+0];
vertexData[ix].normal.y = mmd->normals[ix*3+1];
vertexData[ix].normal.z = mmd->normals[ix*3+2];
/* texture coords */
vertexData[ix].coord.x = mmd->coords[ix*2+0];
vertexData[ix].coord.y = mmd->coords[ix*2+1] * -1;
/* fix coords */
if (vertexData[ix].coord.x < 0.0f)
vertexData[ix].coord.x += 1.0f;
if (vertexData[ix].coord.y < 0.0f)
vertexData[ix].coord.y += 1.0f;
/* if there is packed texture */
if (atlas && textureList[i]) {
kmVec2 coord;
coord.x = vertexData[ix].coord.x;
coord.y = vertexData[ix].coord.y;
glhckAtlasTransformCoordinates(atlas, textureList[i], &coord, &coord);
vertexData[ix].coord.x = coord.x;
vertexData[ix].coord.y = coord.y;
}
indices[i2] = ix;
}
}
if (atlas) {
if (!(material = glhckMaterialNew(glhckAtlasGetTexture(atlas))))
goto mmd_no_memory;
glhckObjectMaterial(object, material);
NULLDO(glhckMaterialFree, material);
NULLDO(glhckAtlasFree, atlas);
NULLDO(_glhckFree, textureList);
}
/* triangle strip geometry */
if (!(stripIndices = _glhckTriStrip(indices, mmd->num_indices, &numIndices))) {
/* failed, use non stripped geometry */
geometryType = GLHCK_TRIANGLES;
numIndices = mmd->num_indices;
stripIndices = indices;
} else NULLDO(_glhckFree, indices);
/* set geometry */
glhckObjectInsertIndices(object, itype, stripIndices, numIndices);
glhckObjectInsertVertices(object, vtype, vertexData, mmd->num_vertices);
object->geometry->type = geometryType;
/* finish */
NULLDO(_glhckFree, vertexData);
NULLDO(_glhckFree, stripIndices);
NULLDO(mmd_free, mmd);
RET(0, "%d", RETURN_OK);
return RETURN_OK;
read_fail:
DEBUG(GLHCK_DBG_ERROR, "Failed to open: %s", file);
goto fail;
mmd_import_fail:
DEBUG(GLHCK_DBG_ERROR, "MMD importing failed.");
goto fail;
mmd_no_memory:
DEBUG(GLHCK_DBG_ERROR, "MMD not enough memory.");
fail:
IFDO(fclose, f);
IFDO(glhckAtlasFree, atlas);
IFDO(mmd_free, mmd);
IFDO(_glhckFree, textureList);
IFDO(_glhckFree, vertexData);
IFDO(_glhckFree, indices);
IFDO(_glhckFree, stripIndices);
RET(0, "%d", RETURN_FAIL);
return RETURN_FAIL;
}
static int processModel(const char *file, glhckObject *object,
glhckObject *current, const struct aiScene *sc, const struct aiNode *nd,
glhckGeometryIndexType itype, glhckGeometryVertexType vtype, const glhckImportModelParameters *params)
{
unsigned int m, f;
unsigned int numVertices = 0, numIndices = 0;
unsigned int ioffset, voffset;
glhckImportIndexData *indices = NULL;
glhckImportVertexData *vertexData = NULL;
glhckMaterial *material = NULL;
glhckTexture **textureList = NULL, *texture = NULL;
glhckAtlas *atlas = NULL;
const struct aiMesh *mesh;
const struct aiFace *face;
int canFreeCurrent = 0;
int hasTexture = 0;
assert(file);
assert(object && current);
assert(sc && nd);
/* combine && atlas loading path */
if (params->flatten) {
/* prepare atlas for texture combining */
if (!(atlas = glhckAtlasNew()))
goto assimp_no_memory;
/* texturelist for offseting coordinates */
if (!(textureList = _glhckCalloc(nd->mNumMeshes, sizeof(_glhckTexture*))))
goto assimp_no_memory;
/* gather statistics */
for (m = 0; m != nd->mNumMeshes; ++m) {
mesh = sc->mMeshes[nd->mMeshes[m]];
if (!mesh->mVertices) continue;
for (f = 0; f != mesh->mNumFaces; ++f) {
face = &mesh->mFaces[f];
if (!face) goto fail;
numIndices += face->mNumIndices;
}
numVertices += mesh->mNumVertices;
if ((texture = textureFromMaterial(file, sc->mMaterials[mesh->mMaterialIndex]))) {
glhckAtlasInsertTexture(atlas, texture);
glhckTextureFree(texture);
textureList[m] = texture;
hasTexture = 1;
}
}
/* allocate vertices */
if (!(vertexData = _glhckCalloc(numVertices, sizeof(glhckImportVertexData))))
goto assimp_no_memory;
/* allocate indices */
if (!(indices = _glhckMalloc(numIndices * sizeof(glhckImportIndexData))))
goto assimp_no_memory;
/* pack combined textures */
if (hasTexture) {
if (glhckAtlasPack(atlas, GLHCK_RGBA, 1, 0, glhckTextureDefaultParameters()) != RETURN_OK)
goto fail;
} else {
NULLDO(glhckAtlasFree, atlas);
NULLDO(_glhckFree, textureList);
}
/* join vertex data */
for (m = 0, ioffset = 0, voffset = 0; m != nd->mNumMeshes; ++m) {
mesh = sc->mMeshes[nd->mMeshes[m]];
if (!mesh->mVertices) continue;
if (textureList) texture = textureList[m];
else texture = NULL;
joinMesh(mesh, voffset, indices+ioffset, vertexData+voffset, atlas, texture);
for (f = 0; f != mesh->mNumFaces; ++f) {
face = &mesh->mFaces[f];
if (!face) goto fail;
ioffset += face->mNumIndices;
}
voffset += mesh->mNumVertices;
}
/* create material */
if (hasTexture && !(material = glhckMaterialNew(texture)))
goto assimp_no_memory;
/* finally build the model */
if (buildModel(current, numIndices, numVertices,
indices, vertexData, itype, vtype) == RETURN_OK) {
_glhckObjectFile(current, nd->mName.data);
if (material) glhckObjectMaterial(current, material);
if (!(current = glhckObjectNew())) goto fail;
glhckObjectAddChild(object, current);
glhckObjectFree(current);
canFreeCurrent = 1;
}
/* free stuff */
IFDO(glhckAtlasFree, atlas);
IFDO(glhckMaterialFree, material);
IFDO(_glhckFree, textureList);
NULLDO(_glhckFree, vertexData);
NULLDO(_glhckFree, indices);
} else {
/* default loading path */
for (m = 0, ioffset = 0, voffset = 0; m != nd->mNumMeshes; ++m) {
mesh = sc->mMeshes[nd->mMeshes[m]];
if (!mesh->mVertices) continue;
/* gather statistics */
numIndices = 0;
for (f = 0; f != mesh->mNumFaces; ++f) {
face = &mesh->mFaces[f];
if (!face) goto fail;
numIndices += face->mNumIndices;
}
numVertices = mesh->mNumVertices;
// FIXME: create materialFromAssimpMaterial
// that returns glhckMaterial with correct stuff
/* get texture */
hasTexture = 0;
if ((texture = textureFromMaterial(file, sc->mMaterials[mesh->mMaterialIndex])))
hasTexture = 1;
/* create material */
if (hasTexture && !(material = glhckMaterialNew(texture)))
goto assimp_no_memory;
/* allocate vertices */
if (!(vertexData = _glhckCalloc(numVertices, sizeof(glhckImportVertexData))))
goto assimp_no_memory;
/* allocate indices */
if (!(indices = _glhckMalloc(numIndices * sizeof(glhckImportIndexData))))
goto assimp_no_memory;
/* fill arrays */
joinMesh(mesh, 0, indices, vertexData, NULL, NULL);
/* build model */
if (buildModel(current, numIndices, numVertices,
indices, vertexData, itype, vtype) == RETURN_OK) {
/* FIXME: UGLY */
char pointer[16];
snprintf(pointer, sizeof(pointer), "%p", mesh);
_glhckObjectFile(current, pointer);
if (material) glhckObjectMaterial(current, material);
if (!(current = glhckObjectNew())) goto fail;
glhckObjectAddChild(object, current);
glhckObjectFree(current);
canFreeCurrent = 1;
}
/* free stuff */
NULLDO(_glhckFree, vertexData);
NULLDO(_glhckFree, indices);
IFDO(glhckTextureFree, texture);
IFDO(glhckMaterialFree, material);
}
}
/* process childrens */
for (m = 0; m != nd->mNumChildren; ++m) {
if (processModel(file, object, current, sc, nd->mChildren[m],
itype, vtype, params) == RETURN_OK) {
if (!(current = glhckObjectNew())) goto fail;
glhckObjectAddChild(object, current);
glhckObjectFree(current);
canFreeCurrent = 1;
}
}
/* we din't do anything to the next
* allocated object, so free it */
if (canFreeCurrent) glhckObjectRemoveFromParent(current);
return RETURN_OK;
assimp_no_memory:
DEBUG(GLHCK_DBG_ERROR, "Assimp not enough memory.");
fail:
IFDO(_glhckFree, vertexData);
IFDO(_glhckFree, indices);
IFDO(_glhckFree, textureList);
IFDO(glhckTextureFree, texture);
IFDO(glhckMaterialFree, material);
IFDO(glhckAtlasFree, atlas);
if (canFreeCurrent) glhckObjectRemoveFromParent(current);
return RETURN_FAIL;
}
/* \brief import TGA images */
int _glhckImportTGA(const char *file, _glhckImportImageStruct *import)
{
FILE *f;
void *seg = NULL, *data;
int bpp, vinverted = 0;
int rle = 0, footer_present = 0;
size_t datasize, size;
unsigned short i, w, h;
tga_header *header;
tga_footer *footer;
unsigned char *bufptr, *bufend, *importData = NULL;
CALL(0, "%s, %p", file, import);
if (!(f = fopen(file, "rb")))
goto read_fail;
fseek(f, 0L, SEEK_END);
if ((size = ftell(f)) < sizeof(tga_header) + sizeof(tga_footer))
goto not_possible;
if (!(seg = _glhckMalloc(size)))
goto out_of_memory;
fseek(f, 0L, SEEK_SET);
if (fread(seg, 1, size, f) != size)
goto fail;
/* we don't need the file anymore */
NULLDO(fclose, f);
data = seg;
header = (tga_header*)data;
footer = (tga_footer*)((char*)data+size-sizeof(tga_footer));
/* is TGA v2.0? (stop storing the headers at EOF please) */
if (!memcmp(footer->signature, TGA_SIGNATURE, sizeof(footer->signature)))
footer_present = 1;
/* skip over header */
data = (char*)data+sizeof(tga_header);
/* skip over ID filed */
if (header->idLength)
data = (char*)data+header->idLength;
/* inverted TGA? */
vinverted = !(header->descriptor & TGA_DESC_VERTICAL);
switch (header->imageType) {
case TGA_TYPE_COLOR_RLE:
case TGA_TYPE_GRAY_RLE:
rle = 1;
break;
case TGA_TYPE_COLOR:
case TGA_TYPE_GRAY:
rle = 0;
break;
default:
goto unknown_type;
}
bpp = header->bpp;
if (!((bpp == 32) || (bpp == 24) || (bpp == 8)))
goto invalid_bpp;
/* endian safe for 16-bit dimensions */
w = (header->widthHi << 8) | header->widthLo;
h = (header->heightHi << 8) | header->heightLo;
if (!IMAGE_DIMENSIONS_OK(w, h))
goto bad_dimensions;
/* allocate destination buffer */
if (!(importData = _glhckMalloc(w*h*4)))
goto out_of_memory;
/* find out how much data to be read from file
* (this is NOT simply width*height*4, due to compression) */
datasize = size - sizeof(tga_header) - header->idLength -
(footer_present ? sizeof(tga_footer) : 0);
/* bufptr is the next byte to be read from the buffer */
bufptr = data;
bufend = data + datasize;
/* non RLE compressed data */
if (!rle) {
for (i = 0; i < h*w && bufptr+bpp/8 <= bufend; ++i) {
switch (bpp) {
/* 32-bit BGRA */
case 32:
importData[i*4+0] = bufptr[2];
importData[i*4+1] = bufptr[1];
importData[i*4+2] = bufptr[0];
importData[i*4+3] = bufptr[3];
bufptr += 4;
break;
/* 24-bit BGR */
case 24:
importData[i*4+0] = bufptr[2];
importData[i*4+1] = bufptr[1];
importData[i*4+2] = bufptr[0];
importData[i*4+3] = 255;
bufptr += 3;
break;
/* 8-bit grayscale */
case 8:
importData[i*4+0] = bufptr[0];
importData[i*4+1] = bufptr[0];
importData[i*4+2] = bufptr[0];
importData[i*4+3] = 255;
bufptr += 1;
break;
}
}
}
/* RLE compressed data */
if (rle) {
DEBUG(GLHCK_DBG_ERROR, "RLE compressed import not yet implemented.");
goto fail;
}
/* some TGA's are upside-down */
if (vinverted) _glhckInvertPixels(importData, w, h, 4);
/* free */
NULLDO(_glhckFree, seg);
/* fill import struct */
import->width = w;
import->height = h;
import->data = importData;
import->format = GLHCK_RGBA;
import->type = GLHCK_UNSIGNED_BYTE;
import->flags |= (bpp==32?GLHCK_TEXTURE_IMPORT_ALPHA:0);
RET(0, "%d", RETURN_OK);
return RETURN_OK;
read_fail:
DEBUG(GLHCK_DBG_ERROR, "Failed to open: %s", file);
goto fail;
not_possible:
DEBUG(GLHCK_DBG_ERROR, "Assumed TGA file '%s' has too small filesize", file);
goto fail;
out_of_memory:
DEBUG(GLHCK_DBG_ERROR, "Out of memory, won't load file: %s", file);
goto fail;
unknown_type:
DEBUG(GLHCK_DBG_ERROR, "Unknown TGA image type");
goto fail;
invalid_bpp:
DEBUG(GLHCK_DBG_ERROR, "TGA image is not either 32, 24 or 8 bpp");
goto fail;
bad_dimensions:
DEBUG(GLHCK_DBG_ERROR, "TGA image has invalid dimension %dx%d", w, h);
fail:
IFDO(fclose, f);
IFDO(_glhckFree, importData);
IFDO(_glhckFree, seg);
RET(0, "%d", RETURN_FAIL);
return RETURN_FAIL;
}
