static GPUTexture *GPU_texture_create_nD(
int w, int h, int n, const float *fpixels, int depth,
GPUHDRType hdr_type, int components, int samples,
char err_out[256])
{
GLenum type, format, internalformat;
void *pixels = NULL;
if (samples) {
CLAMP_MAX(samples, GPU_max_color_texture_samples());
}
GPUTexture *tex = MEM_callocN(sizeof(GPUTexture), "GPUTexture");
tex->w = w;
tex->h = h;
tex->number = -1;
tex->refcount = 1;
tex->target = (n == 1) ? GL_TEXTURE_1D : (samples ? GL_TEXTURE_2D_MULTISAMPLE : GL_TEXTURE_2D);
tex->target_base = (n == 1) ? GL_TEXTURE_1D : GL_TEXTURE_2D;
tex->depth = depth;
tex->fb_attachment = -1;
glGenTextures(1, &tex->bindcode);
if (!tex->bindcode) {
if (err_out) {
BLI_snprintf(err_out, 256, "GPUTexture: texture create failed: %d",
(int)glGetError());
}
else {
fprintf(stderr, "GPUTexture: texture create failed: %d\n",
(int)glGetError());
}
GPU_texture_free(tex);
return NULL;
}
if (!GPU_full_non_power_of_two_support()) {
tex->w = power_of_2_max_i(tex->w);
tex->h = power_of_2_max_i(tex->h);
}
tex->number = 0;
glBindTexture(tex->target, tex->bindcode);
if (depth) {
type = GL_UNSIGNED_BYTE;
format = GL_DEPTH_COMPONENT;
internalformat = GL_DEPTH_COMPONENT;
}
else {
type = GL_FLOAT;
if (components == 4) {
format = GL_RGBA;
switch (hdr_type) {
case GPU_HDR_NONE:
internalformat = GL_RGBA8;
break;
/* the following formats rely on ARB_texture_float or OpenGL 3.0 */
case GPU_HDR_HALF_FLOAT:
internalformat = GL_RGBA16F_ARB;
break;
case GPU_HDR_FULL_FLOAT:
internalformat = GL_RGBA32F_ARB;
break;
default:
break;
}
}
else if (components == 2) {
/* these formats rely on ARB_texture_rg or OpenGL 3.0 */
format = GL_RG;
switch (hdr_type) {
case GPU_HDR_NONE:
internalformat = GL_RG8;
break;
case GPU_HDR_HALF_FLOAT:
internalformat = GL_RG16F;
break;
case GPU_HDR_FULL_FLOAT:
internalformat = GL_RG32F;
break;
default:
break;
}
}
if (fpixels && hdr_type == GPU_HDR_NONE) {
type = GL_UNSIGNED_BYTE;
pixels = GPU_texture_convert_pixels(w * h, fpixels);
}
}
if (tex->target == GL_TEXTURE_1D) {
glTexImage1D(tex->target, 0, internalformat, tex->w, 0, format, type, NULL);
if (fpixels) {
glTexSubImage1D(tex->target, 0, 0, w, format, type,
pixels ? pixels : fpixels);
if (tex->w > w) {
GPU_glTexSubImageEmpty(tex->target, format, w, 0, tex->w - w, 1);
}
}
}
else {
if (samples) {
glTexImage2DMultisample(tex->target, samples, internalformat, tex->w, tex->h, true);
}
else {
glTexImage2D(tex->target, 0, internalformat, tex->w, tex->h, 0,
format, type, NULL);
}
if (fpixels) {
glTexSubImage2D(tex->target, 0, 0, 0, w, h,
format, type, pixels ? pixels : fpixels);
if (tex->w > w)
GPU_glTexSubImageEmpty(tex->target, format, w, 0, tex->w - w, tex->h);
if (tex->h > h)
GPU_glTexSubImageEmpty(tex->target, format, 0, h, w, tex->h - h);
}
}
if (pixels)
MEM_freeN(pixels);
if (depth) {
glTexParameteri(tex->target_base, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(tex->target_base, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(tex->target_base, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
glTexParameteri(tex->target_base, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
glTexParameteri(tex->target_base, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
}
else {
glTexParameteri(tex->target_base, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(tex->target_base, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
if (tex->target_base != GL_TEXTURE_1D) {
glTexParameteri(tex->target_base, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(tex->target_base, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
else
glTexParameteri(tex->target_base, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
return tex;
}
static GPUTexture *GPU_texture_create_nD(int w, int h, int n, float *fpixels, int depth, char err_out[256])
{
GPUTexture *tex;
GLenum type, format, internalformat;
void *pixels = NULL;
if (depth && !GLEW_ARB_depth_texture)
return NULL;
tex = MEM_callocN(sizeof(GPUTexture), "GPUTexture");
tex->w = w;
tex->h = h;
tex->number = -1;
tex->refcount = 1;
tex->target = (n == 1)? GL_TEXTURE_1D: GL_TEXTURE_2D;
tex->depth = depth;
glGenTextures(1, &tex->bindcode);
if (!tex->bindcode) {
if (err_out) {
BLI_snprintf(err_out, 256, "GPUTexture: texture create failed: %d",
(int)glGetError());
}
else {
fprintf(stderr, "GPUTexture: texture create failed: %d\n",
(int)glGetError());
}
GPU_texture_free(tex);
return NULL;
}
if (!GPU_non_power_of_two_support()) {
tex->w = power_of_2_max_i(tex->w);
tex->h = power_of_2_max_i(tex->h);
}
tex->number = 0;
glBindTexture(tex->target, tex->bindcode);
if (depth) {
type = GL_UNSIGNED_BYTE;
format = GL_DEPTH_COMPONENT;
internalformat = GL_DEPTH_COMPONENT;
}
else {
type = GL_UNSIGNED_BYTE;
format = GL_RGBA;
internalformat = GL_RGBA8;
if (fpixels)
pixels = GPU_texture_convert_pixels(w*h, fpixels);
}
if (tex->target == GL_TEXTURE_1D) {
glTexImage1D(tex->target, 0, internalformat, tex->w, 0, format, type, NULL);
if (fpixels) {
glTexSubImage1D(tex->target, 0, 0, w, format, type,
pixels ? pixels : fpixels);
if (tex->w > w)
GPU_glTexSubImageEmpty(tex->target, format, w, 0,
tex->w-w, 1);
}
}
else {
glTexImage2D(tex->target, 0, internalformat, tex->w, tex->h, 0,
format, type, NULL);
if (fpixels) {
glTexSubImage2D(tex->target, 0, 0, 0, w, h,
format, type, pixels ? pixels : fpixels);
if (tex->w > w)
GPU_glTexSubImageEmpty(tex->target, format, w, 0, tex->w-w, tex->h);
if (tex->h > h)
GPU_glTexSubImageEmpty(tex->target, format, 0, h, w, tex->h-h);
}
}
if (pixels)
MEM_freeN(pixels);
if (depth) {
glTexParameteri(tex->target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(tex->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(tex->target, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE);
glTexParameteri(tex->target, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
glTexParameteri(tex->target, GL_DEPTH_TEXTURE_MODE_ARB, GL_INTENSITY);
}
else {
glTexParameteri(tex->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(tex->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
if (tex->target != GL_TEXTURE_1D) {
/* CLAMP_TO_BORDER is an OpenGL 1.3 core feature */
GLenum wrapmode = (depth || tex->h == 1)? GL_CLAMP_TO_EDGE: GL_CLAMP_TO_BORDER;
glTexParameteri(tex->target, GL_TEXTURE_WRAP_S, wrapmode);
glTexParameteri(tex->target, GL_TEXTURE_WRAP_T, wrapmode);
#if 0
float borderColor[] = { 1.0f, 1.0f, 1.0f, 1.0f };
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, borderColor);
#endif
}
else
glTexParameteri(tex->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
return tex;
}
GPUTexture *GPU_texture_create_3D(int w, int h, int depth, int channels, const float *fpixels)
{
GLenum type, format, internalformat;
void *pixels = NULL;
GPUTexture *tex = MEM_callocN(sizeof(GPUTexture), "GPUTexture");
tex->w = w;
tex->h = h;
tex->depth = depth;
tex->number = -1;
tex->refcount = 1;
tex->target = GL_TEXTURE_3D;
tex->target_base = GL_TEXTURE_3D;
glGenTextures(1, &tex->bindcode);
if (!tex->bindcode) {
fprintf(stderr, "GPUTexture: texture create failed: %d\n",
(int)glGetError());
GPU_texture_free(tex);
return NULL;
}
tex->number = 0;
glBindTexture(tex->target, tex->bindcode);
GPU_ASSERT_NO_GL_ERRORS("3D glBindTexture");
type = GL_FLOAT;
if (channels == 4) {
format = GL_RGBA;
internalformat = GL_RGBA8;
}
else {
format = GL_RED;
internalformat = GL_INTENSITY8;
}
/* 3D textures are quite heavy, test if it's possible to create them first */
glTexImage3D(GL_PROXY_TEXTURE_3D, 0, internalformat, tex->w, tex->h, tex->depth, 0, format, type, NULL);
bool rescale = false;
int r_width;
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &r_width);
while (r_width == 0) {
rescale = true;
tex->w /= 2;
tex->h /= 2;
tex->depth /= 2;
glTexImage3D(GL_PROXY_TEXTURE_3D, 0, internalformat, tex->w, tex->h, tex->depth, 0, format, type, NULL);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &r_width);
}
/* really unlikely to happen but keep this just in case */
tex->w = max_ii(tex->w, 1);
tex->h = max_ii(tex->h, 1);
tex->depth = max_ii(tex->depth, 1);
#if 0
if (fpixels)
pixels = GPU_texture_convert_pixels(w*h*depth, fpixels);
#endif
GPU_ASSERT_NO_GL_ERRORS("3D glTexImage3D");
/* hardcore stuff, 3D texture rescaling - warning, this is gonna hurt your performance a lot, but we need it
* for gooseberry */
if (rescale && fpixels) {
/* FIXME: should these be floating point? */
const unsigned int xf = w / tex->w, yf = h / tex->h, zf = depth / tex->depth;
float *tex3d = MEM_mallocN(channels * sizeof(float) * tex->w * tex->h * tex->depth, "tex3d");
GPU_print_error_debug("You need to scale a 3D texture, feel the pain!");
for (unsigned k = 0; k < tex->depth; k++) {
for (unsigned j = 0; j < tex->h; j++) {
for (unsigned i = 0; i < tex->w; i++) {
/* obviously doing nearest filtering here,
* it's going to be slow in any case, let's not make it worse */
float xb = i * xf;
float yb = j * yf;
float zb = k * zf;
unsigned int offset = k * (tex->w * tex->h) + i * tex->h + j;
unsigned int offset_orig = (zb) * (w * h) + (xb) * h + (yb);
if (channels == 4) {
tex3d[offset * 4] = fpixels[offset_orig * 4];
tex3d[offset * 4 + 1] = fpixels[offset_orig * 4 + 1];
tex3d[offset * 4 + 2] = fpixels[offset_orig * 4 + 2];
tex3d[offset * 4 + 3] = fpixels[offset_orig * 4 + 3];
}
else
tex3d[offset] = fpixels[offset_orig];
}
}
}
glTexImage3D(tex->target, 0, internalformat, tex->w, tex->h, tex->depth, 0, format, type, tex3d);
MEM_freeN(tex3d);
}
else {
if (fpixels) {
glTexImage3D(tex->target, 0, internalformat, tex->w, tex->h, tex->depth, 0, format, type, fpixels);
GPU_ASSERT_NO_GL_ERRORS("3D glTexSubImage3D");
}
}
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
if (pixels)
MEM_freeN(pixels);
GPU_texture_unbind(tex);
return tex;
}