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fs2open.github.com/code/graphics/gropengltexture.cpp
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/*
* Copyright (C) Volition, Inc. 1999. All rights reserved.
*
* All source code herein is the property of Volition, Inc. You may not sell
* or otherwise commercially exploit the source or things you created based on the
* source.
*
*/
#ifdef _WIN32
#include <windows.h>
#endif
#include "bmpman/bmpman.h"
#include "cmdline/cmdline.h"
#include "ddsutils/ddsutils.h"
#include "globalincs/systemvars.h"
#include "graphics/grinternal.h"
#include "graphics/gropenglstate.h"
#include "graphics/gropengltexture.h"
#include "math/vecmat.h"
#include "osapi/osregistry.h"
static tcache_slot_opengl *Textures = NULL;
static int *Tex_used_this_frame = NULL;
int GL_texture_ram = 0;
int GL_min_texture_width = 0;
GLint GL_max_texture_width = 0;
int GL_min_texture_height = 0;
GLint GL_max_texture_height = 0;
int GL_textures_in = 0;
int GL_textures_in_frame = 0;
int GL_last_detail = -1;
GLint GL_supported_texture_units = 2;
int GL_should_preload = 0;
ubyte GL_xlat[256];
GLfloat GL_anisotropy = 1.0f;
GLfloat GL_max_anisotropy = -1.0f;
int GL_mipmap_filter = 0;
GLenum GL_texture_target = GL_TEXTURE_2D;
GLenum GL_texture_face = GL_TEXTURE_2D;
GLenum GL_texture_addressing = GL_REPEAT;
bool GL_rendering_to_texture = false;
GLint GL_max_renderbuffer_size = 0;
extern int GLOWMAP;
extern int SPECMAP;
extern int CLOAKMAP;
extern int ENVMAP;
extern int Interp_multitex_cloakmap;
// forward declarations
int opengl_free_texture(tcache_slot_opengl *t);
void opengl_free_texture_with_handle(int handle);
void opengl_tcache_get_adjusted_texture_size(int w_in, int h_in, int *w_out, int *h_out);
int opengl_create_texture_sub(int bitmap_handle, int bitmap_type, int bmap_w, int bmap_h, int tex_w, int tex_h, ubyte *data = NULL, tcache_slot_opengl *t = NULL, int base_level = 0, int resize = 0, int reload = 0);
int opengl_create_texture (int bitmap_handle, int bitmap_type, tcache_slot_opengl *tslot = NULL);
void opengl_set_additive_tex_env()
{
GL_CHECK_FOR_ERRORS("start of set_additive_tex_env()");
if ( Is_Extension_Enabled(OGL_ARB_TEXTURE_ENV_COMBINE) ) {
GL_state.Texture.SetEnvCombineMode(GL_COMBINE_RGB, GL_ADD);
GL_state.Texture.SetRGBScale(1.0f);
} else {
GL_state.Texture.SetEnvMode(GL_ADD);
}
GL_CHECK_FOR_ERRORS("end of set_additive_tex_env()");
}
void opengl_set_modulate_tex_env()
{
GL_CHECK_FOR_ERRORS("start of set_modulate_tex_env()");
if ( Is_Extension_Enabled(OGL_ARB_TEXTURE_ENV_COMBINE) ) {
GL_state.Texture.SetEnvCombineMode(GL_COMBINE_RGB, GL_MODULATE);
GL_state.Texture.SetRGBScale(4.0f);
} else {
GL_state.Texture.SetEnvMode(GL_MODULATE);
}
GL_CHECK_FOR_ERRORS("end of set_modulate_tex_env()");
}
GLfloat opengl_get_max_anisotropy()
{
if ( !Is_Extension_Enabled(OGL_EXT_TEXTURE_FILTER_ANISOTROPIC) ) {
return 0.0f;
}
if ( GL_max_anisotropy < 0.0f ) {
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &GL_max_anisotropy);
}
// the spec says that it should be a minimum of 2.0
Assert( GL_max_anisotropy >= 2.0f );
return GL_max_anisotropy;
}
void opengl_set_texture_target( GLenum target )
{
GL_texture_target = target;
}
void opengl_tcache_init()
{
int i;
GL_should_preload = 1;
GL_min_texture_width = 16;
GL_min_texture_height = 16;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &GL_max_texture_width);
GL_max_texture_height = GL_max_texture_width;
// if we are not using sections then make sure we have the min texture size available to us
// 1024 is what we need with the standard resolutions - taylor
if (GL_max_texture_width < 1024) {
Error(LOCATION, "A minimum texture size of \"1024x1024\" is required for FS2_Open but only \"%ix%i\" was found. Can not continue.", GL_max_texture_width, GL_max_texture_height);
}
if (Textures == NULL) {
Textures = (tcache_slot_opengl *) vm_malloc_q(MAX_BITMAPS * sizeof(tcache_slot_opengl));
}
if (Tex_used_this_frame == NULL) {
Tex_used_this_frame = (int *) vm_malloc_q(MAX_BITMAPS * sizeof(int));
}
if ( !Textures || !Tex_used_this_frame )
Error(LOCATION, "Unable to allocate memory for OpenGL texture slots!");
memset( Tex_used_this_frame, 0, MAX_BITMAPS * sizeof(int) );
// Init the texture structures
for (i = 0; i < MAX_BITMAPS; i++) {
Textures[i].reset();
}
// check what mipmap filter we should be using
// 0 == Bilinear
// 1 == Trilinear
GL_mipmap_filter = os_config_read_uint(NULL, "TextureFilter", 1);
if (GL_mipmap_filter > 1) {
GL_mipmap_filter = 1;
}
// max size (width and/or height) that we can use for framebuffer/renderbuffer
if ( Is_Extension_Enabled(OGL_EXT_FRAMEBUFFER_OBJECT) ) {
glGetIntegerv(GL_MAX_RENDERBUFFER_SIZE_EXT, &GL_max_renderbuffer_size);
// if we can't do at least 128x128 then just disable FBOs
if (GL_max_renderbuffer_size < 128) {
mprintf(("WARNING: Max dimensions of FBO, %ix%i, is less the required minimum!! Extension will be disabled!\n", GL_max_renderbuffer_size, GL_max_renderbuffer_size));
GL_Extensions[OGL_EXT_FRAMEBUFFER_OBJECT].enabled = 0;
}
}
// anisotropy
if ( Is_Extension_Enabled(OGL_EXT_TEXTURE_FILTER_ANISOTROPIC) ) {
// set max value first thing
opengl_get_max_anisotropy();
// now for the user setting
const char *plevel = os_config_read_string( NULL, NOX("OGL_AnisotropicFilter"), NOX("1.0") );
GL_anisotropy = (GLfloat) strtod(plevel, (char**)NULL);
CLAMP(GL_anisotropy, 1.0f, GL_max_anisotropy);
}
if ( Is_Extension_Enabled(OGL_EXT_TEXTURE_LOD_BIAS) ) {
if (GL_anisotropy > 1.0f) {
glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, 0.0f);
} else {
glTexEnvf(GL_TEXTURE_FILTER_CONTROL, GL_TEXTURE_LOD_BIAS, -0.75f);
}
}
// set the alpha gamma settings (for fonts)
memset( GL_xlat, 0, sizeof(GL_xlat) );
for (i = 1; i < 15; i++) {
GL_xlat[i] = (ubyte)(GL_xlat[i-1] + 17);
}
GL_xlat[15] = GL_xlat[1];
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &GL_supported_texture_units);
Assert( GL_supported_texture_units >= 2 );
GL_last_detail = Detail.hardware_textures;
GL_textures_in = 0;
GL_textures_in_frame = 0;
}
void opengl_free_texture_with_handle(int handle)
{
int n = bm_get_cache_slot(handle, 1);
Tex_used_this_frame[n] = 0;
opengl_free_texture( &Textures[n] );
}
void opengl_tcache_flush()
{
int i;
if ( Textures == NULL )
return;
for (i = 0; i < MAX_BITMAPS; i++)
opengl_free_texture( &Textures[i] );
if (GL_textures_in != 0) {
mprintf(( "WARNING: VRAM is at %d instead of zero after flushing!\n", GL_textures_in ));
GL_textures_in = 0;
}
}
extern void opengl_kill_all_render_targets();
void opengl_tcache_shutdown()
{
opengl_kill_all_render_targets();
opengl_tcache_flush();
GL_textures_in = 0;
GL_textures_in_frame = 0;
if (Textures != NULL) {
vm_free(Textures);
Textures = NULL;
}
if (Tex_used_this_frame != NULL) {
vm_free(Tex_used_this_frame);
Tex_used_this_frame = NULL;
}
}
void opengl_tcache_frame()
{
GL_textures_in_frame = 0;
// make all textures as not used
memset( Tex_used_this_frame, 0, MAX_BITMAPS * sizeof(int) );
}
extern bool GL_initted;
void opengl_free_texture_slot( int n )
{
if ( !GL_initted ) {
return;
}
Tex_used_this_frame[n] = 0;
opengl_free_texture( &Textures[n] );
}
/**
* Determine if a bitmap is in API memory, so that we can just reuse it rather
* that having to load it from disk again
*/
bool opengl_texture_slot_valid(int n, int handle)
{
tcache_slot_opengl *t = &Textures[n];
if (t->bitmap_handle < 0) {
return false;
}
if (t->bitmap_handle != handle) {
return false;
}
if ( !glIsTexture(t->texture_id) ) {
return false;
}
return true;
}
int opengl_free_texture(tcache_slot_opengl *t)
{
// Bitmap changed!!
if (t->texture_id) {
// if I, or any of my children have been used this frame, bail
// can't use bm_get_cache_slot() here since bitmap_id probably isn't valid
if ( (t->bitmap_handle >= 0) && Tex_used_this_frame[t->bitmap_handle % MAX_BITMAPS] ) {
return 0;
}
// ok, now we know its legal to free everything safely
GL_state.Texture.Delete(t->texture_id);
glDeleteTextures (1, &t->texture_id);
GL_textures_in -= t->size;
t->reset();
}
return 1;
}
void opengl_tcache_get_adjusted_texture_size(int w_in, int h_in, int *w_out, int *h_out)
{
int i, tex_w, tex_h;
// bogus
if ( (w_out == NULL) || (h_out == NULL) ) {
return;
}
// if we can support non-power-of-2 textures then just return current sizes - taylor
if ( Is_Extension_Enabled(OGL_ARB_TEXTURE_NON_POWER_OF_TWO) ) {
*w_out = w_in;
*h_out = h_in;
return;
}
// starting size
tex_w = w_in;
tex_h = h_in;
for (i = 0; i < 16; i++) {
if ( (tex_w > (1<<i)) && (tex_w <= (1<<(i+1))) ) {
tex_w = 1 << (i+1);
break;
}
}
for (i = 0; i < 16; i++) {
if ( (tex_h > (1<<i)) && (tex_h <= (1<<(i+1))) ) {
tex_h = 1 << (i+1);
break;
}
}
CLAMP(tex_w, GL_min_texture_width, GL_max_texture_width);
CLAMP(tex_h, GL_min_texture_height, GL_max_texture_height);
// store the outgoing size
*w_out = tex_w;
*h_out = tex_h;
}
// data == start of bitmap data
// bmap_w == width of source bitmap
// bmap_h == height of source bitmap
// tex_w == width of final texture
// tex_h == height of final texture
int opengl_create_texture_sub(int bitmap_handle, int bitmap_type, int bmap_w, int bmap_h, int tex_w, int tex_h, ubyte *data, tcache_slot_opengl *t, int base_level, int resize, int reload)
{
int ret_val = 1;
int byte_mult = 0;
GLenum texFormat = GL_UNSIGNED_SHORT_1_5_5_5_REV;
GLenum glFormat = GL_BGRA;
GLint intFormat = GL_RGBA;
ubyte saved_bpp = 0;
int mipmap_w = 0, mipmap_h = 0;
int dsize = 0, doffset = 0, block_size = 0;
int i,j,k;
ubyte *bmp_data = data;
ubyte *texmem = NULL, *texmemp = NULL;
int skip_size = 0, mipmap_levels = 0;
GL_CHECK_FOR_ERRORS("start of create_texture_sub()");
// bogus
if ( (t == NULL) || (bmp_data == NULL) ) {
return 0;
}
int idx = bm_get_cache_slot( bitmap_handle, 1 );
if ( Tex_used_this_frame[idx] ) {
mprintf(( "ARGHH!!! Texture already used this frame! Cannot free it!\n" ));
return 0;
}
if ( !reload ) {
// save the bpp since it will get reset - fixes anis being 0 bpp
saved_bpp = t->bpp;
// gah
if ( !opengl_free_texture(t) ) {
return 0;
}
}
// for everything that might use mipmaps
mipmap_w = tex_w;
mipmap_h = tex_h;
if ( (bitmap_type == TCACHE_TYPE_AABITMAP) || (bitmap_type == TCACHE_TYPE_INTERFACE) ) {
t->u_scale = (float)bmap_w / (float)tex_w;
t->v_scale = (float)bmap_h / (float)tex_h;
} else {
t->u_scale = 1.0f;
t->v_scale = 1.0f;
}
if ( !reload ) {
glGenTextures (1, &t->texture_id);
}
if (t->texture_id == 0) {
mprintf(("!!OpenGL DEBUG!! t->texture_id == 0\n"));
return 0;
}
if (t->bpp == 0) {
// it got reset, revert to saved setting
t->bpp = saved_bpp;
}
// set the byte per pixel multiplier
byte_mult = (t->bpp >> 3);
// GL_BGRA_EXT is *much* faster with some hardware/drivers
if (byte_mult == 4) {
texFormat = GL_UNSIGNED_INT_8_8_8_8_REV;
intFormat = (gr_screen.bits_per_pixel == 32) ? GL_RGBA8 : GL_RGB5_A1;
glFormat = GL_BGRA;
} else if (byte_mult == 3) {
texFormat = GL_UNSIGNED_BYTE;
intFormat = (gr_screen.bits_per_pixel == 32) ? GL_RGB8 : GL_RGB5;
glFormat = GL_BGR;
} else if (byte_mult == 2) {
texFormat = GL_UNSIGNED_SHORT_1_5_5_5_REV;
intFormat = GL_RGB5_A1;
glFormat = GL_BGRA;
} else if (byte_mult == 1) {
Assertion( bitmap_type == TCACHE_TYPE_AABITMAP, "Invalid type for bitmap: %s BMPMAN handle: %d. Type expected was 0, we got %d instead.\nThis can be caused by using texture compression on a non-power-of-2 texture.\n", bm_get_filename(bitmap_handle), bitmap_handle, bitmap_type );
texFormat = GL_UNSIGNED_BYTE;
intFormat = GL_ALPHA;
glFormat = GL_ALPHA;
} else {
texFormat = GL_UNSIGNED_SHORT_1_5_5_5_REV;
intFormat = GL_RGBA;
glFormat = GL_BGRA;
}
// check for compressed image types
switch ( bm_is_compressed(bitmap_handle) ) {
case DDS_DXT1:
case DDS_CUBEMAP_DXT1:
intFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
block_size = 8;
break;
case DDS_DXT3:
case DDS_CUBEMAP_DXT3:
intFormat = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT;
block_size = 16;
break;
case DDS_DXT5:
case DDS_CUBEMAP_DXT5:
intFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
block_size = 16;
break;
}
if ( bitmap_type == TCACHE_TYPE_CUBEMAP ) {
t->texture_target = GL_TEXTURE_CUBE_MAP;
}
glBindTexture(t->texture_target, t->texture_id);
GLenum min_filter = GL_LINEAR;
if (t->mipmap_levels > 1) {
min_filter = (GL_mipmap_filter) ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR_MIPMAP_NEAREST;
if ( Is_Extension_Enabled(OGL_EXT_TEXTURE_FILTER_ANISOTROPIC) ) {
glTexParameterf(t->texture_target, GL_TEXTURE_MAX_ANISOTROPY_EXT, GL_anisotropy);
}
}
glTexParameteri(t->texture_target, GL_TEXTURE_MAX_LEVEL, t->mipmap_levels-1);
glTexParameteri(t->texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(t->texture_target, GL_TEXTURE_MIN_FILTER, min_filter);
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
t->wrap_mode = GL_CLAMP_TO_EDGE;
mipmap_levels = bm_get_num_mipmaps(bitmap_handle);
switch (bitmap_type) {
case TCACHE_TYPE_COMPRESSED: {
if (block_size > 0) {
// size of data block (4x4)
dsize = ((mipmap_h + 3) / 4) * ((mipmap_w + 3) / 4) * block_size;
// if we are skipping mipmap levels in order to resize then we have to calc the new offset
for (i = 0; i < base_level; i++) {
doffset += dsize;
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
dsize = ((mipmap_h + 3) / 4) * ((mipmap_w + 3) / 4) * block_size;
}
skip_size = doffset;
if ( !reload ) {
vglCompressedTexImage2D(GL_TEXTURE_2D, 0, intFormat, mipmap_w, mipmap_h, 0, dsize, bmp_data + doffset);
} else {
vglCompressedTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, mipmap_w, mipmap_h, intFormat, dsize, bmp_data + doffset);
}
// now that the base image is done handle any mipmap levels
for (i = 1; i < (mipmap_levels - base_level); i++) {
// adjust the data offset for the next block
doffset += dsize;
// reduce size by half for the next pass
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
// size of data block (4x4)
dsize = ((mipmap_h + 3) / 4) * ((mipmap_w + 3) / 4) * block_size;
if ( !reload ) {
vglCompressedTexImage2D(GL_TEXTURE_2D, i, intFormat, mipmap_w, mipmap_h, 0, dsize, bmp_data + doffset);
} else {
vglCompressedTexSubImage2D(GL_TEXTURE_2D, i, 0, 0, mipmap_w, mipmap_h, intFormat, dsize, bmp_data + doffset);
}
}
} else {
Int3();
return 0;
}
break;
}
case TCACHE_TYPE_AABITMAP: {
texmem = (ubyte *) vm_malloc (tex_w*tex_h*byte_mult);
texmemp = texmem;
Assert( texmem != NULL );
int luminance = 0;
for (i = 0; i < tex_h; i++) {
for (j = 0; j < tex_w; j++) {
if ( (i < bmap_h) && (j < bmap_w) ) {
if ( byte_mult > 1 ) {
luminance = 0;
if ( byte_mult > 3 ) {
for (k = 0; k < 3; k++) {
luminance += bmp_data[(i*bmap_w+j)*byte_mult+k];
}
*texmemp++ = (ubyte)((luminance / 3) * (bmp_data[(i*bmap_w+j)*byte_mult+3]/255.0f));
} else {
for (k = 0; k < byte_mult; k++) {
luminance += bmp_data[(i*bmap_w+j)*byte_mult+k];
}
*texmemp++ = (ubyte)(luminance / byte_mult);
}
} else {
*texmemp++ = GL_xlat[bmp_data[i*bmap_w+j]];
}
} else {
*texmemp++ = 0;
}
}
}
if ( !reload ) {
glTexImage2D (t->texture_target, 0, GL_ALPHA, tex_w, tex_h, 0, GL_ALPHA, GL_UNSIGNED_BYTE, texmem);
} else { // faster anis
glTexSubImage2D (t->texture_target, 0, 0, 0, tex_w, tex_h, GL_ALPHA, GL_UNSIGNED_BYTE, texmem);
}
if (texmem != NULL) {
vm_free(texmem);
}
break;
}
case TCACHE_TYPE_INTERFACE: {
// if we aren't resizing then we can just use bmp_data directly
if (resize) {
texmem = (ubyte *) vm_malloc (tex_w*tex_h*byte_mult);
texmemp = texmem;
Assert( texmem != NULL );
for (i = 0; i < tex_h; i++) {
for (j = 0;j < tex_w; j++) {
if ( (i < bmap_h) && (j < bmap_w) ) {
for (k = 0; k < byte_mult; k++) {
*texmemp++ = bmp_data[(i*bmap_w+j)*byte_mult+k];
}
} else {
for (k = 0; k < byte_mult; k++) {
*texmemp++ = 0;
}
}
}
}
}
if ( !reload ) {
glTexImage2D (t->texture_target, 0, intFormat, mipmap_w, mipmap_h, 0, glFormat, texFormat, (resize) ? texmem : bmp_data);
} else { // faster anis
glTexSubImage2D (t->texture_target, 0, 0, 0, mipmap_w, mipmap_h, glFormat, texFormat, (resize) ? texmem : bmp_data);
}
if (texmem != NULL) {
vm_free(texmem);
}
break;
}
case TCACHE_TYPE_CUBEMAP: {
Assert( !resize );
Assert( texmem == NULL );
Assert( Is_Extension_Enabled(OGL_ARB_TEXTURE_CUBE_MAP) );
// we have to load in all 6 faces...
for (i = 0; i < 6; i++) {
doffset += dsize;
// check if it's a compressed cubemap first
if (block_size > 0) {
// size of data block (4x4)
dsize = ((mipmap_h + 3) / 4) * ((mipmap_w + 3) / 4) * block_size;
if ( !reload ) {
vglCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, 0, intFormat, mipmap_w, mipmap_h, 0, dsize, bmp_data + doffset);
} else {
vglCompressedTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, 0, 0, 0, mipmap_w, mipmap_h, intFormat, dsize, bmp_data + doffset);
}
// now that the base image is done handle any mipmap levels
for (j = 1; j < mipmap_levels; j++) {
// adjust the data offset for the next block
doffset += dsize;
// reduce size by half for the next pass
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
// size of data block (4x4)
dsize = ((mipmap_h + 3) / 4) * ((mipmap_w + 3) / 4) * block_size;
if ( !reload ) {
vglCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, j, intFormat, mipmap_w, mipmap_h, 0, dsize, bmp_data + doffset);
} else {
vglCompressedTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, j, 0, 0, mipmap_w, mipmap_h, intFormat, dsize, bmp_data + doffset);
}
}
}
// nope, it's uncompressed...
else {
dsize = mipmap_h * mipmap_w * byte_mult;
if ( !reload ) {
glTexImage2D (GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, 0, intFormat, mipmap_w, mipmap_h, 0, glFormat, texFormat, bmp_data + doffset);
} else { // faster anis
glTexSubImage2D (GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, 0, 0, 0, mipmap_w, mipmap_h, glFormat, texFormat, bmp_data + doffset);
}
// base image is done so now take care of any mipmap levels
for (j = 1; j < mipmap_levels; j++) {
doffset += dsize;
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
dsize = mipmap_h * mipmap_w * byte_mult;
if ( !reload ) {
glTexImage2D (GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, j, intFormat, mipmap_w, mipmap_h, 0, glFormat, texFormat, bmp_data + doffset);
} else {
glTexSubImage2D (GL_TEXTURE_CUBE_MAP_POSITIVE_X+i, j, 0, 0, mipmap_w, mipmap_h, glFormat, texFormat, bmp_data + doffset);
}
}
}
// reset width and height for next face
mipmap_w = tex_w;
mipmap_h = tex_h;
}
break;
}
default: {
// if we aren't resizing then we can just use bmp_data directly
if (resize) {
texmem = (ubyte *) vm_malloc (tex_w*tex_h*byte_mult);
texmemp = texmem;
Assert( texmem != NULL );
fix u, utmp, v, du, dv;
u = v = 0;
du = ( (bmap_w-1)*F1_0 ) / tex_w;
dv = ( (bmap_h-1)*F1_0 ) / tex_h;
for (j=0;j<tex_h;j++)
{
utmp = u;
for (i=0;i<tex_w;i++)
{
for (k = 0; k < byte_mult; k++) {
*texmemp++ = bmp_data[(f2i(v)*bmap_w+f2i(utmp))*byte_mult+k];
}
utmp += du;
}
v += dv;
}
}
// should never have mipmap levels if we also have to manually resize
if ( (mipmap_levels > 1) && resize ) {
Assert( texmem == NULL );
}
dsize = mipmap_h * mipmap_w * byte_mult;
// if we are skipping mipmap levels in order to resize then we have to calc the new offset
for (i = 0; i < base_level; i++) {
doffset += dsize;
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
dsize = mipmap_h * mipmap_w * byte_mult;
}
skip_size = doffset;
if ( !reload ) {
glTexImage2D (GL_TEXTURE_2D, 0, intFormat, mipmap_w, mipmap_h, 0, glFormat, texFormat, (texmem != NULL) ? texmem : bmp_data + doffset);
} else { // faster anis
glTexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, mipmap_w, mipmap_h, glFormat, texFormat, (texmem != NULL) ? texmem : bmp_data + doffset);
}
// base image is done so now take care of any mipmap levels
for (i = 1; i < (mipmap_levels - base_level); i++) {
doffset += dsize;
mipmap_w >>= 1;
mipmap_h >>= 1;
if (mipmap_w <= 0) {
mipmap_w = 1;
}
if (mipmap_h <= 0) {
mipmap_h = 1;
}
dsize = mipmap_h * mipmap_w * byte_mult;
if ( !reload ) {
glTexImage2D (GL_TEXTURE_2D, i, intFormat, mipmap_w, mipmap_h, 0, glFormat, texFormat, bmp_data + doffset);
} else {
glTexSubImage2D (GL_TEXTURE_2D, i, 0, 0, mipmap_w, mipmap_h, glFormat, texFormat, bmp_data + doffset);
}
}
if (texmem != NULL) {
vm_free(texmem);
}
break;
}
}//end switch
t->bitmap_handle = bitmap_handle;
t->size = (dsize) ? ((doffset + dsize) - skip_size) : (tex_w * tex_h * byte_mult);
t->w = (ushort)tex_w;
t->h = (ushort)tex_h;
GL_textures_in_frame += t->size;
if ( !reload ) {
GL_textures_in += t->size;
}
Tex_used_this_frame[idx] = 0;
GL_CHECK_FOR_ERRORS("end of create_texture_sub()");
return ret_val;
}
int opengl_create_texture(int bitmap_handle, int bitmap_type, tcache_slot_opengl *tslot)
{
ubyte flags;
bitmap *bmp;
int final_w, final_h;
ubyte bpp = 16;
int reload = 0, resize = 0, base_level = 0;
int max_levels = 0;
GL_CHECK_FOR_ERRORS("start of create_texture()");
if (tslot == NULL) {
return 0;
}
// setup texture/bitmap flags
flags = 0;
switch (bitmap_type) {
case TCACHE_TYPE_AABITMAP:
flags |= BMP_AABITMAP;
bpp = 8;
break;
case TCACHE_TYPE_CUBEMAP:
case TCACHE_TYPE_NORMAL:
flags |= BMP_TEX_OTHER;
break;
case TCACHE_TYPE_INTERFACE:
case TCACHE_TYPE_XPARENT:
flags |= BMP_TEX_XPARENT;
break;
case TCACHE_TYPE_COMPRESSED:
switch ( bm_is_compressed(bitmap_handle) ) {
case DDS_DXT1: //dxt1
bpp = 24;
flags |= BMP_TEX_DXT1;
break;
case DDS_DXT3: //dxt3
bpp = 32;
flags |= BMP_TEX_DXT3;
break;
case DDS_DXT5: //dxt5
bpp = 32;
flags |= BMP_TEX_DXT5;
break;
case DDS_CUBEMAP_DXT1:
bpp = 24;
flags |= BMP_TEX_CUBEMAP;
break;
case DDS_CUBEMAP_DXT3:
case DDS_CUBEMAP_DXT5:
bpp = 32;
flags |= BMP_TEX_CUBEMAP;
break;
default:
Assert( 0 );
break;
}
break;
}
// lock the bitmap into the proper format
bmp = bm_lock(bitmap_handle, bpp, flags);
if ( bmp == NULL ) {
mprintf(("Couldn't lock bitmap %d (%s).\n", bitmap_handle, bm_get_filename(bitmap_handle) ));
return 0;
}
int max_w = bmp->w;
int max_h = bmp->h;
max_levels = bm_get_num_mipmaps(bitmap_handle);
// there should only ever be one mipmap level for interface graphics!!!
if ( (bitmap_type == TCACHE_TYPE_INTERFACE) && (max_levels > 1) ) {
max_levels = 1;
}
// if we ended up locking a texture that wasn't originally compressed then this should catch it
if ( !(bitmap_type == TCACHE_TYPE_CUBEMAP) && bm_is_compressed(bitmap_handle) ) {
bitmap_type = TCACHE_TYPE_COMPRESSED;
}
if ( (Detail.hardware_textures < 4) && (bitmap_type != TCACHE_TYPE_AABITMAP) && (bitmap_type != TCACHE_TYPE_INTERFACE)
&& ((bitmap_type != TCACHE_TYPE_COMPRESSED) || ((bitmap_type == TCACHE_TYPE_COMPRESSED) && (max_levels > 1))) )
{
if (max_levels == 1) {
// if we are going to cull the size then we need to force a resize
// Detail.debris_culling goes from 0 to 4.
max_w /= (16 >> Detail.hardware_textures);
max_h /= (16 >> Detail.hardware_textures);
CLAMP(max_w, GL_min_texture_width, GL_max_texture_width);
CLAMP(max_h, GL_min_texture_height, GL_max_texture_height);
resize = 1;
} else {
// we have mipmap levels so use those as a resize point (image should already be power-of-2)
base_level = -(Detail.hardware_textures - 4);
Assert(base_level >= 0);
if (base_level >= max_levels) {
base_level = max_levels - 1;
}
Assert( (max_levels - base_level) >= 1 );
}
}
// get final texture size
opengl_tcache_get_adjusted_texture_size(max_w, max_h, &final_w, &final_h);
// only resize if we actually need a new size, better data use and speed out of opengl_create_texture_sub()
if ( (max_w != final_w) || (max_h != final_h) ) {
resize = 1;
// little safety check for later, we can't manually resize AND use mipmap resizing
Assert( !base_level );
}
if ( (final_h < 1) || (final_w < 1) ) {
mprintf(("Bitmap %s is too small at %dx%d.\n", bm_get_filename(bitmap_handle), final_w, final_h ));
return 0;
}
// if this tcache slot has no bitmap
if (tslot->bitmap_handle < 0) {
reload = 0;
}
// different bitmap altogether - determine if the new one can use the old one's slot
else if (tslot->bitmap_handle != bitmap_handle) {
if ( (final_w == tslot->w) && (final_h == tslot->h) ) {
reload = 1;
} else {
reload = 0;
}
}
// set the bits per pixel
tslot->bpp = bmp->bpp;
// max number of mipmap levels (NOTE: this is the max number used by the API, not how many true mipmap levels there are in the image!!)
tslot->mipmap_levels = (ubyte)(max_levels - base_level);
// call the helper
int ret_val = opengl_create_texture_sub(bitmap_handle, bitmap_type, bmp->w, bmp->h, final_w, final_h, (ubyte*)bmp->data, tslot, base_level, resize, reload);
// unlock the bitmap
bm_unlock(bitmap_handle);
// if we successfully sent the texture to API memory then go ahead and dump
// the rest of the bitmap data in system memory.
// NOTE: this doesn't do anything for user bitmaps (like screen grabs or streamed animations)
if (ret_val) {
bm_unload_fast(bitmap_handle);
}
GL_CHECK_FOR_ERRORS("end of create_texture()");
return ret_val;
}
// WARNING: Needs to match what is in bm_internal.h!!!!!
#define RENDER_TARGET_DYNAMIC 17
int gr_opengl_tcache_set_internal(int bitmap_handle, int bitmap_type, float *u_scale, float *v_scale, int tex_unit = 0)
{
int ret_val = 1;
GL_CHECK_FOR_ERRORS("start of tcache_set_internal()");
if (GL_last_detail != Detail.hardware_textures) {
GL_last_detail = Detail.hardware_textures;
opengl_tcache_flush();
}
int n = bm_get_cache_slot (bitmap_handle, 1);
tcache_slot_opengl *t = &Textures[n];
GL_state.Texture.SetActiveUnit(tex_unit);
if (!bm_is_render_target(bitmap_handle) &&
((t->bitmap_handle < 0) || (bitmap_handle != t->bitmap_handle)) )
{
ret_val = opengl_create_texture( bitmap_handle, bitmap_type, t );
}
// everything went ok
if (ret_val && t->texture_id) {
*u_scale = t->u_scale;
*v_scale = t->v_scale;
GL_state.Texture.SetTarget(t->texture_target);
GL_state.Texture.Enable(t->texture_id);
if ( (t->wrap_mode != GL_texture_addressing) && (bitmap_type != TCACHE_TYPE_AABITMAP)
&& (bitmap_type != TCACHE_TYPE_INTERFACE) && (bitmap_type != TCACHE_TYPE_CUBEMAP) )
{
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_S, GL_texture_addressing);
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_T, GL_texture_addressing);
glTexParameteri(t->texture_target, GL_TEXTURE_WRAP_R, GL_texture_addressing);
t->wrap_mode = GL_texture_addressing;
}
Tex_used_this_frame[n]++;
}
// gah
else {
mprintf(("Texturing disabled for bitmap %d (%s) due to internal error.\n", bitmap_handle, bm_get_filename(bitmap_handle)));
GL_state.Texture.Disable();
return 0;
}
GL_CHECK_FOR_ERRORS("end of tcache_set_internal()");
return 1;
}
int gr_opengl_tcache_set(int bitmap_handle, int bitmap_type, float *u_scale, float *v_scale, int stage)
{
int rc = 0;
if (bitmap_handle <= 0) {
return 0;
}
GL_CHECK_FOR_ERRORS("start of tcache_set()");
// set special type if it's so, needed to be right later, but cubemaps are special
if ( !(bitmap_type == TCACHE_TYPE_CUBEMAP) ) {
int type = bm_get_tcache_type(bitmap_handle);
if (type != TCACHE_TYPE_NORMAL) {
bitmap_type = type;
}
}
rc = gr_opengl_tcache_set_internal(bitmap_handle, bitmap_type, u_scale, v_scale, stage);
GL_CHECK_FOR_ERRORS("end of tcache_set()");
return rc;
}
void opengl_preload_init()
{
if (gr_screen.mode != GR_OPENGL)
return;
// opengl_tcache_flush ();
}
int gr_opengl_preload(int bitmap_num, int is_aabitmap)
{
float u_scale, v_scale;
int retval;
Assert( gr_screen.mode == GR_OPENGL );
if ( !GL_should_preload ) {
return 0;
}
retval = gr_opengl_tcache_set(bitmap_num, (is_aabitmap) ? TCACHE_TYPE_AABITMAP : TCACHE_TYPE_NORMAL, &u_scale, &v_scale);
GL_state.Texture.Disable();
if ( !retval ) {
mprintf(("Texture upload failed!\n"));
}
return retval;
}
static int GL_texture_panning_enabled = 0;
void gr_opengl_set_texture_panning(float u, float v, bool enable)
{
if (Cmdline_nohtl)
return;
GLint current_matrix;
if (enable) {
glGetIntegerv(GL_MATRIX_MODE, &current_matrix);
glMatrixMode( GL_TEXTURE );
glPushMatrix();
glTranslatef( u, v, 0.0f );
glMatrixMode(current_matrix);
GL_texture_panning_enabled = 1;
} else if (GL_texture_panning_enabled) {
glGetIntegerv(GL_MATRIX_MODE, &current_matrix);
glMatrixMode( GL_TEXTURE );
glPopMatrix();
glMatrixMode(current_matrix);
GL_texture_panning_enabled = 0;
}
}
void gr_opengl_set_texture_addressing(int mode)
{
GL_CHECK_FOR_ERRORS("start of set_texture_addressing()");
switch (mode) {
case TMAP_ADDRESS_CLAMP:
GL_texture_addressing = GL_CLAMP_TO_EDGE;
break;
case TMAP_ADDRESS_WRAP:
GL_texture_addressing = GL_REPEAT;
break;
case TMAP_ADDRESS_MIRROR: {
if ( Is_Extension_Enabled(OGL_ARB_TEXTURE_MIRRORED_REPEAT) ) {
GL_texture_addressing = GL_MIRRORED_REPEAT_ARB;
} else {
GL_texture_addressing = GL_REPEAT;
}
break;
}
default:
Int3();
break;
}
GL_CHECK_FOR_ERRORS("end of set_texture_addressing()");
}
int opengl_compress_image( ubyte **compressed_data, ubyte *in_data, int width, int height, int alpha, int num_mipmaps )
{
Assert( in_data != NULL );
if ( !Texture_compression_available ) {
return 0;
}
GL_CHECK_FOR_ERRORS("start of compress_image()");
GLuint tex;
GLint compressed = GL_FALSE;
GLint compressed_size = 0;
ubyte *out_data = NULL;
GLint testing = 0;
GLint intFormat = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
GLenum texFormat = GL_UNSIGNED_BYTE;
GLenum glFormat = GL_BGR;
int i;
if (alpha) {
intFormat = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;
texFormat = GL_UNSIGNED_INT_8_8_8_8_REV;
glFormat = GL_BGRA;
}
glGenTextures(1, &tex);
GL_state.Texture.SetActiveUnit(0);
GL_state.Texture.SetTarget(GL_TEXTURE_2D);
GL_state.Texture.Enable(tex);
// a quick proxy test. this will tell us if it's possible without wasting a lot of time and resources in the attempt
glTexImage2D(GL_PROXY_TEXTURE_2D, 0, intFormat, width, height, 0, glFormat, texFormat, in_data);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_ARB, &compressed);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &testing);
if (compressed == GL_TRUE) {
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &compressed);
}
if ( (compressed == GL_FALSE) || (compressed != intFormat) || (testing == 0) ) {
GL_state.Texture.Disable();
GL_state.Texture.Delete(tex);
glDeleteTextures(1, &tex);
return 0;
}
// if mipmaps are requested then make them with the nicest possible settings
if (num_mipmaps > 1) {
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
glHint(GL_GENERATE_MIPMAP_HINT_SGIS, GL_NICEST);
}
// use best compression quality
glHint(GL_TEXTURE_COMPRESSION_HINT, GL_NICEST);
// alright, it should work if we are still here, now do it for real
glTexImage2D(GL_TEXTURE_2D, 0, intFormat, width, height, 0, glFormat, texFormat, in_data);
// if we got this far then it should have worked, but check anyway
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_ARB, &compressed);
Assert( compressed != GL_FALSE );
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &compressed);
Assert( compressed == intFormat );
// for each mipmap level we generate go ahead and figure up the total memory required
for (i = 0; i < num_mipmaps; i++) {
glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &testing);
compressed_size += testing;
}
out_data = (ubyte*)vm_malloc(compressed_size * sizeof(ubyte));
Assert( out_data != NULL );
memset(out_data, 0, compressed_size * sizeof(ubyte));
// reset compressed_size and go back through each mipmap level to get both size and the image data itself
compressed_size = 0;
for (i = 0; i < num_mipmaps; i++) {
glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &testing);
vglGetCompressedTexImageARB(GL_TEXTURE_2D, i, out_data + compressed_size);
compressed_size += testing;
}
// done with everything so reset hints to default values
if (num_mipmaps > 1) {
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_FALSE);
glHint(GL_GENERATE_MIPMAP_HINT, GL_DONT_CARE);
}
glHint(GL_TEXTURE_COMPRESSION_HINT, GL_DONT_CARE);
GL_state.Texture.Disable();
GL_state.Texture.Delete(tex);
glDeleteTextures(1, &tex);
// send the data back out
*compressed_data = out_data;
GL_CHECK_FOR_ERRORS("end of compress_image()");
return compressed_size;
}
void gr_opengl_get_bitmap_from_texture(void* data_out, int bitmap_num)
{
float u,v;
gr_opengl_tcache_set(bitmap_num, TCACHE_TYPE_NORMAL, &u, &v);
int n = bm_get_cache_slot(bitmap_num, 1);
tcache_slot_opengl *ts = &Textures[n];
GLenum pixel_format = GL_RGB;
GLenum data_format = GL_FLOAT;
int bytes_per_pixel = 3 * sizeof(float);
if ( bm_has_alpha_channel(bitmap_num) ) {
pixel_format = GL_RGBA;
bytes_per_pixel = 4 * sizeof(float);
}
opengl_get_texture(ts->texture_target, pixel_format, data_format, 1, ts->w, ts->h, bytes_per_pixel, data_out, 0);
}
int opengl_get_texture( GLenum target, GLenum pixel_format, GLenum data_format, int num_mipmaps, int width, int height, int bytes_per_pixel, void* image_data, int offset )
{
int m_offset = offset;
int m_width = width;
int m_height = height;
for ( int i = 0; i < num_mipmaps; i++ ) {
glGetTexImage(target, i, pixel_format, data_format, (ubyte*)image_data + m_offset);
m_offset += (m_width * m_height * bytes_per_pixel);
// reduce by half for next mipmap level
m_width >>= 1;
m_height >>= 1;
if (m_width < 1)
m_width = 1;
if (m_height < 1)
m_height = 1;
}
return m_offset;
}
// sends a texture object out to "image_data", which should be memory which is already allocated
// this should only be used for uncompressed 24-bit or 32-bit (distiguished by "alpha" var) images
// returns 0 on failure, size of data on success
int opengl_export_render_target( int slot, int width, int height, int alpha, int num_mipmaps, ubyte *image_data )
{
tcache_slot_opengl *ts = &Textures[slot];
GL_CHECK_FOR_ERRORS("start of export_image()");
if (!image_data) {
mprintf(("OpenGL ERROR: Tried to export a texture without a valid export location!\n"));
return 0;
}
if (!ts->texture_target) {
mprintf(("OpenGL ERROR: Tried to export a texture for which I don't know the texture target!\n"));
return 0;
}
if (ts->mipmap_levels != num_mipmaps) {
mprintf(("OpenGL ERROR: Number of mipmap levels requested is different from number available!\n"));
return 0;
}
if ( (ts->texture_target != GL_TEXTURE_2D) && (ts->texture_target != GL_TEXTURE_CUBE_MAP) ) {
mprintf(("OpenGL ERROR: Only 2D textures and cube maps can be exported!\n"));
return 0;
}
if ( (ts->w != width) && (ts->h != height) ) {
mprintf(("OpenGL ERROR: Passed width and height do not match values for texture!\n"));
return 0;
}
int faces = 1;
int m_width = width;
int m_height = height;
int m_bpp = (alpha) ? 4 : 3;
int m_offset = 0;
GLenum target = (ts->texture_target == GL_TEXTURE_CUBE_MAP) ? GL_TEXTURE_CUBE_MAP_POSITIVE_X : GL_TEXTURE_2D;
if (ts->texture_target == GL_TEXTURE_CUBE_MAP)
faces = 6;
GL_state.Texture.SetActiveUnit(0);
GL_state.Texture.SetTarget(ts->texture_target);
GL_state.Texture.Enable(ts->texture_id);
for (int i = 0; i < faces; i++) {
m_offset = opengl_get_texture(
target + i,
(alpha) ? GL_BGRA : GL_BGR,
(alpha) ? GL_UNSIGNED_INT_8_8_8_8_REV : GL_UNSIGNED_BYTE,
ts->mipmap_levels,
m_width,
m_height,
m_bpp,
image_data,
m_offset
);
}
GL_state.Texture.Disable();
GL_CHECK_FOR_ERRORS("end of export_image()");
return m_offset;
}
void gr_opengl_update_texture(int bitmap_handle, int bpp, ubyte* data, int width, int height)
{
GLenum texFormat, glFormat;
int n = bm_get_cache_slot (bitmap_handle, 1);
tcache_slot_opengl *t = &Textures[n];
if(!t->texture_id)
return;
int byte_mult = (bpp >> 3);
int true_byte_mult = (t->bpp >> 3);
ubyte* texmem = NULL;
// GL_BGRA_EXT is *much* faster with some hardware/drivers
if (true_byte_mult == 4) {
texFormat = GL_UNSIGNED_INT_8_8_8_8_REV;
glFormat = GL_BGRA;
} else if (true_byte_mult == 3) {
texFormat = GL_UNSIGNED_BYTE;
glFormat = GL_BGR;
} else {
texFormat = GL_UNSIGNED_SHORT_1_5_5_5_REV;
glFormat = GL_BGRA;
}
if (byte_mult == 1) {
texFormat = GL_UNSIGNED_BYTE;
glFormat = GL_ALPHA;
texmem = (ubyte *) vm_malloc (width*height*byte_mult);
ubyte* texmemp = texmem;
Assert( texmem != NULL );
int luminance = 0;
for (int i = 0; i < height; i++) {
for (int j = 0; j < width; j++) {
if ( (i < height) && (j < width) ) {
if ( true_byte_mult > 1 ) {
luminance = 0;
if ( true_byte_mult > 3 ) {
for (int k = 0; k < 3; k++) {
luminance += data[(i*width+j)*true_byte_mult+k];
}
*texmemp++ = (ubyte)((luminance / 3) * (data[(i*width+j)*true_byte_mult+3]/255.0f));
} else {
for (int k = 0; k < true_byte_mult; k++) {
luminance += data[(i*width+j)*true_byte_mult+k];
}
*texmemp++ = (ubyte)(luminance / true_byte_mult);
}
} else {
*texmemp++ = GL_xlat[data[i*width+j]];
}
} else {
*texmemp++ = 0;
}
}
}
}
glBindTexture(GL_TEXTURE_2D, t->texture_id);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, glFormat, texFormat, (texmem)?texmem:data);
if (texmem != NULL)
vm_free(texmem);
}
// -----------------------------------------------------------------------------
// GL_EXT_framebuffer_object stuff (ie, render-to-texture)
//
struct fbo_t {
// these first vars should only be modified in opengl_make_render_target()
GLuint renderbuffer_id;
GLuint framebuffer_id;
int width;
int height;
int ref_count;
// these next 2 should only be modifed in opengl_set_render_target()
int working_slot;
int is_static;
fbo_t() :
renderbuffer_id(0), framebuffer_id(0), width(0), height(0),
ref_count(0), working_slot(-1), is_static(0)
{
}
};
static SCP_vector<fbo_t> RenderTarget;
static fbo_t *render_target = NULL;
int opengl_check_framebuffer()
{
GLenum status;
status = vglCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
char err_txt[100] = { 0 };
switch (status) {
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
strcpy_s(err_txt, "Incomplete attachments!");
break;
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
strcpy_s(err_txt, "Missing one or more image attachments!");
break;
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
strcpy_s(err_txt, "Attached images do not have the same width and height!");
break;
case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_EXT:
strcpy_s(err_txt, "Attached images do not have the same internal format!");
break;
case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
strcpy_s(err_txt, "Draw buffer attachment point is NONE!");
break;
case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
strcpy_s(err_txt, "Read buffer attachment point is NONE!");
break;
case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
strcpy_s(err_txt, "Attached images violate current FBO restrictions!");
break;
default:
strcpy_s(err_txt, "Unknown error!\n");
break;
}
mprintf(("Framebuffer ERROR: %s\n", err_txt));
return (int)status;
}
return 0;
}
static fbo_t *opengl_get_fbo(int width, int height)
{
size_t rt_size = RenderTarget.size();
for (size_t i = 0; i < rt_size; i++) {
if ( (RenderTarget[i].width == width) && (RenderTarget[i].height == height) ) {
return &RenderTarget[i];
}
}
return NULL;
}
void opengl_kill_render_target(int slot)
{
if ( (slot < 0) || (slot >= MAX_BITMAPS) ) {
Int3();
return;
}
// this will happen when opengl_kill_all_render_targets() gets called first on exit
if ( RenderTarget.empty() ) {
return;
}
tcache_slot_opengl *ts = &Textures[slot];
size_t idx = 0;
for (idx = 0; idx < RenderTarget.size(); idx++) {
if ( (RenderTarget[idx].width == ts->w) && (RenderTarget[idx].height == ts->h) ) {
break;
}
}
// this may happen when textures are flushed, the w and h will get reset to 0
if ( idx >= RenderTarget.size() ) {
return;
}
RenderTarget[idx].ref_count--;
if (RenderTarget[idx].ref_count <= 0) {
mprintf(("OpenGL: Killing off unused %ix%i render target...\n", ts->w, ts->h));
if (RenderTarget[idx].framebuffer_id) {
vglDeleteFramebuffersEXT(1, &RenderTarget[idx].framebuffer_id);
RenderTarget[idx].framebuffer_id = 0;
}
if (RenderTarget[idx].renderbuffer_id) {
vglDeleteRenderbuffersEXT(1, &RenderTarget[idx].renderbuffer_id);
RenderTarget[idx].renderbuffer_id = 0;
}
RenderTarget.erase( RenderTarget.begin() + idx );
} else {
mprintf(("OpenGL: Keeping %ix%i render target with ref_count of %i.\n", ts->w, ts->h, RenderTarget[idx].ref_count));
}
}
void opengl_kill_all_render_targets()
{
for (size_t i = 0; i < RenderTarget.size(); i++) {
fbo_t *fbo = &RenderTarget[i];
if (fbo->framebuffer_id) {
vglDeleteFramebuffersEXT(1, &fbo->framebuffer_id);
fbo->framebuffer_id = 0;
}
if (fbo->renderbuffer_id) {
vglDeleteRenderbuffersEXT(1, &fbo->renderbuffer_id);
fbo->renderbuffer_id = 0;
}
}
RenderTarget.clear();
}
int opengl_set_render_target( int slot, int face, int is_static )
{
tcache_slot_opengl *ts = NULL;
fbo_t *fbo = NULL;
GL_CHECK_FOR_ERRORS("start of set_render_target()");
if (slot < 0) {
if ( (render_target != NULL) && (render_target->working_slot >= 0) ) {
if (render_target->is_static) {
extern void gr_opengl_bm_save_render_target(int slot);
gr_opengl_bm_save_render_target(render_target->working_slot);
}
}
vglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, 0, 0);
vglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
vglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
if (render_target != NULL) {
render_target->working_slot = -1;
render_target->is_static = 0;
}
// done with this render target so lets move on
render_target = NULL;
GL_rendering_to_texture = false;
GL_CHECK_FOR_ERRORS("end of set_render_target(0)");
return 1;
}
ts = &Textures[slot];
Assert( ts != NULL );
if (!ts->texture_id) {
Int3();
return 0;
}
fbo = opengl_get_fbo(ts->w, ts->h);
if (fbo == NULL) {
mprintf(("Tried to get an OpenGL FBO that didn't exist!\n"));
return 0;
}
if ( !vglIsFramebufferEXT(fbo->framebuffer_id) /*|| !vglIsRenderbufferEXT(fbo->renderbuffer_id)*/ ) {
Int3();
return 0;
}
// vglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, fbo->renderbuffer_id);
vglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo->framebuffer_id);
if (ts->texture_target == GL_TEXTURE_CUBE_MAP) {
Assert( (face >= 0) && (face < 6) );
vglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, ts->texture_id, 0);
} else {
Assert( face <= 0 );
vglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, ts->texture_target, ts->texture_id, 0);
}
// vglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, fbo->renderbuffer_id);
if ( opengl_check_framebuffer() ) {
Int3();
return 0;
}
fbo->working_slot = slot;
fbo->is_static = is_static;
// save current fbo for later use
render_target = fbo;
GL_rendering_to_texture = true;
GL_CHECK_FOR_ERRORS("end of set_render_target()");
return 1;
}
int opengl_make_render_target( int handle, int slot, int *w, int *h, ubyte *bpp, int *mm_lvl, int flags )
{
Assert( !GL_rendering_to_texture );
if (slot < 0) {
Int3();
return 0;
}
// got to have at least width and height!
if (!w || !h) {
Int3();
return 0;
}
// size check
if (*w > GL_max_renderbuffer_size) {
*w = GL_max_renderbuffer_size;
}
if (*h > GL_max_renderbuffer_size) {
*h = GL_max_renderbuffer_size;
}
tcache_slot_opengl *ts = &Textures[slot];
fbo_t *fbo = opengl_get_fbo(*w, *h);
GL_CHECK_FOR_ERRORS("start of make_render_target()");
// since we only deal with one frame/render buffer, see if we need to modify what we have or use it as is
if ( (fbo != NULL) && (fbo->width == *w) && (fbo->height == *h) ) {
// both should be valid, but we check to catch the off-chance that something is fubar
Assert( vglIsFramebufferEXT(fbo->framebuffer_id) /*&& vglIsRenderbufferEXT(fbo->renderbuffer_id)*/ );
// we can use the existing FBO without modification so just setup the texture slot and move on
if (flags & BMP_FLAG_CUBEMAP) {
opengl_set_texture_target( GL_TEXTURE_CUBE_MAP );
} else {
opengl_set_texture_target();
}
glGenTextures(1, &ts->texture_id);
GL_state.Texture.SetActiveUnit(0);
GL_state.Texture.SetTarget(GL_texture_target);
GL_state.Texture.Enable(ts->texture_id);
glTexParameteri(GL_texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (flags & BMP_FLAG_CUBEMAP) {
// if a cubemap then we have to initalize each face
for (int i = 0; i < 6; i++) {
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA, *w, *h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
}
ts->texture_target = GL_TEXTURE_CUBE_MAP;
} else {
// non-cubemap so just do the normal thing
glTexImage2D(GL_state.Texture.GetTarget(), 0, GL_RGBA, *w, *h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
ts->texture_target = GL_state.Texture.GetTarget();
}
/* if (Cmdline_mipmap) {
vglGenerateMipmapEXT(GL_state.Texture.GetTarget());
extern int get_num_mipmap_levels(int w, int h);
ts->mipmap_levels = get_num_mipmap_levels(*w, *h);
} else */
{
ts->mipmap_levels = 1;
}
GL_state.Texture.Disable();
ts->w = (ushort)*w;
ts->h = (ushort)*h;
ts->bpp = 24;
ts->bitmap_handle = -1;//handle;
ts->u_scale = 1.0f;
ts->v_scale = 1.0f;
if (bpp) {
*bpp = ts->bpp;
}
if (mm_lvl) {
*mm_lvl = ts->mipmap_levels;
}
opengl_set_texture_target();
fbo->ref_count++;
mprintf(("OpenGL: Reusing %ix%i FBO!\n", *w, *h));
GL_CHECK_FOR_ERRORS("end of make_render_target(0)");
return 1;
}
// now on to the good parts...
fbo_t new_fbo;
if (flags & BMP_FLAG_CUBEMAP) {
opengl_set_texture_target( GL_TEXTURE_CUBE_MAP );
} else {
opengl_set_texture_target();
}
// initialize color texture
glGenTextures(1, &ts->texture_id);
GL_state.Texture.SetActiveUnit(0);
GL_state.Texture.SetTarget(GL_texture_target);
GL_state.Texture.Enable(ts->texture_id);
glTexParameteri(GL_texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
if (flags & BMP_FLAG_CUBEMAP) {
// if a cubemap then we have to initalize each face
for (int i = 0; i < 6; i++) {
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA, *w, *h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
}
} else {
// non-cubemap so just do the normal thing
glTexImage2D(GL_state.Texture.GetTarget(), 0, GL_RGBA, *w, *h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
}
/* if (Cmdline_mipmap) {
vglGenerateMipmapEXT(GL_state.Texture.GetTarget());
extern int get_num_mipmap_levels(int w, int h);
ts->mipmap_levels = get_num_mipmap_levels(*w, *h);
} else */
{
ts->mipmap_levels = 1;
}
GL_state.Texture.Disable();
// render buffer
// vglGenRenderbuffersEXT(1, &new_fbo.renderbuffer_id);
// vglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, new_fbo.renderbuffer_id);
// vglRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, *w, *h);
vglBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
// frame buffer
vglGenFramebuffersEXT(1, &new_fbo.framebuffer_id);
vglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, new_fbo.framebuffer_id);
if (flags & BMP_FLAG_CUBEMAP) {
vglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_X, ts->texture_id, 0);
} else {
vglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_state.Texture.GetTarget(), ts->texture_id, 0);
}
// vglFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, new_fbo.renderbuffer_id);
if ( opengl_check_framebuffer() ) {
// Oops!! reset everything and then bail
mprintf(("OpenGL: Unable to create FBO!\n"));
vglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
GL_state.Texture.Disable();
GL_state.Texture.Delete(ts->texture_id);
glDeleteTextures(1, &ts->texture_id);
ts->texture_id = 0;
vglDeleteFramebuffersEXT(1, &new_fbo.framebuffer_id);
// vglDeleteRenderbuffersEXT(1, &new_fbo.renderbuffer_id);
opengl_set_texture_target();
return 0;
}
// save anything that needs saving, cleanup, and then exit
ts->w = (ushort)*w;
ts->h = (ushort)*h;
ts->bpp = 24;
ts->texture_target = GL_state.Texture.GetTarget();
ts->bitmap_handle = -1;//handle;
ts->u_scale = 1.0f;
ts->v_scale = 1.0f;
new_fbo.width = ts->w;
new_fbo.height = ts->h;
if (bpp) {
*bpp = ts->bpp;
}
if (mm_lvl) {
*mm_lvl = ts->mipmap_levels;
}
// Clear the new Texture to black with alpha 1.0
glClearColor(0.0f,0.0f,0.0f,1.0f);
glClear(GL_COLOR_BUFFER_BIT);
vglBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
new_fbo.ref_count++;
RenderTarget.push_back(new_fbo);
opengl_set_texture_target();
mprintf(("OpenGL: Created %ix%i FBO!\n", ts->w, ts->h));
GL_CHECK_FOR_ERRORS("end of make_render_target()");
return 1;
}
/**
* @fn GLuint opengl_get_rtt_framebuffer()
*
* @brief Gets the current RTT framebuffer.
*
* Gets the OpenGL framebuffer ID of the currently in use RTT framebuffer.
* If there is currently none such framebuffer in use then this function returns
* 0 so it can be used in any place where the framebuffer should be reset to the
* default drawing surface.
*
* @author m!m
* @date 14.12.2011
*
* @return The current RTT FBO ID or 0 when not doing RTT.
*/
GLuint opengl_get_rtt_framebuffer()
{
if (render_target == NULL || render_target->working_slot < 0)
return 0;
else
return render_target->framebuffer_id;
}
//
// End of GL_EXT_framebuffer_object stuff
// -----------------------------------------------------------------------------
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