/**
* Free dynamically-allocted texture data attached to the given context.
*/
void
_mesa_free_texture_data(struct gl_context *ctx)
{
GLuint u, tgt;
/* unreference current textures */
for (u = 0; u < ARRAY_SIZE(ctx->Texture.Unit); u++) {
/* The _Current texture could account for another reference */
_mesa_reference_texobj(&ctx->Texture.Unit[u]._Current, NULL);
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
_mesa_reference_texobj(&ctx->Texture.Unit[u].CurrentTex[tgt], NULL);
}
}
/* Free proxy texture objects */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++)
ctx->Driver.DeleteTexture(ctx, ctx->Texture.ProxyTex[tgt]);
/* GL_ARB_texture_buffer_object */
_mesa_reference_buffer_object(ctx, &ctx->Texture.BufferObject, NULL);
for (u = 0; u < ARRAY_SIZE(ctx->Texture.Unit); u++) {
_mesa_reference_sampler_object(ctx, &ctx->Texture.Unit[u].Sampler, NULL);
}
}
void GLAPIENTRY
_mesa_BindImageTexture(GLuint unit, GLuint texture, GLint level,
GLboolean layered, GLint layer, GLenum access,
GLenum format)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_image_unit *u;
if (!validate_bind_image_texture(ctx, unit, texture, level,
layered, layer, access, format))
return;
u = &ctx->ImageUnits[unit];
FLUSH_VERTICES(ctx, 0);
ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
if (texture) {
struct gl_texture_object *t = _mesa_lookup_texture(ctx, texture);
if (!t) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(texture)");
return;
}
/* From section 8.22 "Texture Image Loads and Stores" of the OpenGL ES
* 3.1 spec:
*
* "An INVALID_OPERATION error is generated if texture is not the name
* of an immutable texture object."
*/
if (_mesa_is_gles(ctx) && !t->Immutable) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindImageTexture(!immutable)");
return;
}
_mesa_reference_texobj(&u->TexObj, t);
} else {
_mesa_reference_texobj(&u->TexObj, NULL);
}
u->Level = level;
u->Access = access;
u->Format = format;
u->_ActualFormat = _mesa_get_shader_image_format(format);
if (u->TexObj && _mesa_tex_target_is_layered(u->TexObj->Target)) {
u->Layered = layered;
u->Layer = layer;
u->_Layer = (u->Layered ? 0 : u->Layer);
} else {
u->Layered = GL_FALSE;
u->Layer = 0;
}
if (ctx->Driver.BindImageTexture)
ctx->Driver.BindImageTexture(ctx, u, u->TexObj, level, layered,
layer, access, format);
}
/**
* \note This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE_OBJECT/STATE. On changes to _NEW_TEXTURE_MATRIX,
* the ENABLE_TEXMAT flags are updated by _mesa_update_texture_matrices,
* above.
*
* \param ctx GL context.
*/
void
_mesa_update_texture_state(struct gl_context *ctx)
{
struct gl_program *prog[MESA_SHADER_STAGES];
int i;
int old_max_unit = ctx->Texture._MaxEnabledTexImageUnit;
BITSET_DECLARE(enabled_texture_units, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
memcpy(prog, ctx->_Shader->CurrentProgram, sizeof(prog));
if (prog[MESA_SHADER_FRAGMENT] == NULL &&
_mesa_arb_fragment_program_enabled(ctx)) {
prog[MESA_SHADER_FRAGMENT] = ctx->FragmentProgram.Current;
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE_OBJECT | _NEW_TEXTURE_STATE;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
ctx->Texture._MaxEnabledTexImageUnit = -1;
ctx->Texture._EnabledCoordUnits = 0x0;
memset(&enabled_texture_units, 0, sizeof(enabled_texture_units));
/* First, walk over our programs pulling in all the textures for them.
* Programs dictate specific texture targets to be enabled, and for a draw
* call to be valid they can't conflict about which texture targets are
* used.
*/
update_program_texture_state(ctx, prog, enabled_texture_units);
/* Also pull in any textures necessary for fixed function fragment shading.
*/
if (!prog[MESA_SHADER_FRAGMENT])
update_ff_texture_state(ctx, enabled_texture_units);
/* Now, clear out the _Current of any disabled texture units. */
for (i = 0; i <= ctx->Texture._MaxEnabledTexImageUnit; i++) {
if (!BITSET_TEST(enabled_texture_units, i))
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
for (i = ctx->Texture._MaxEnabledTexImageUnit + 1; i <= old_max_unit; i++) {
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
/* add fallback texture for SampleMapATI if there is nothing */
if (_mesa_ati_fragment_shader_enabled(ctx) &&
ctx->ATIFragmentShader.Current->Program)
fix_missing_textures_for_atifs(ctx,
ctx->ATIFragmentShader.Current->Program,
enabled_texture_units);
if (!prog[MESA_SHADER_FRAGMENT] || !prog[MESA_SHADER_VERTEX])
update_texgen(ctx);
}
/**
* \note This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
* flags are updated by _mesa_update_texture_matrices, above.
*
* \param ctx GL context.
*/
static void
update_texture_state( struct gl_context *ctx )
{
struct gl_program *prog[MESA_SHADER_STAGES];
int i;
int old_max_unit = ctx->Texture._MaxEnabledTexImageUnit;
BITSET_DECLARE(enabled_texture_units, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
for (i = 0; i < MESA_SHADER_STAGES; i++) {
if (ctx->_Shader->CurrentProgram[i] &&
ctx->_Shader->CurrentProgram[i]->LinkStatus) {
prog[i] = ctx->_Shader->CurrentProgram[i]->_LinkedShaders[i]->Program;
} else {
if (i == MESA_SHADER_FRAGMENT && ctx->FragmentProgram._Enabled)
prog[i] = &ctx->FragmentProgram.Current->Base;
else
prog[i] = NULL;
}
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
ctx->Texture._MaxEnabledTexImageUnit = -1;
ctx->Texture._EnabledCoordUnits = 0x0;
memset(&enabled_texture_units, 0, sizeof(enabled_texture_units));
/* First, walk over our programs pulling in all the textures for them.
* Programs dictate specific texture targets to be enabled, and for a draw
* call to be valid they can't conflict about which texture targets are
* used.
*/
update_program_texture_state(ctx, prog, enabled_texture_units);
/* Also pull in any textures necessary for fixed function fragment shading.
*/
if (!prog[MESA_SHADER_FRAGMENT])
update_ff_texture_state(ctx, enabled_texture_units);
/* Now, clear out the _Current of any disabled texture units. */
for (i = 0; i <= ctx->Texture._MaxEnabledTexImageUnit; i++) {
if (!BITSET_TEST(enabled_texture_units, i))
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
for (i = ctx->Texture._MaxEnabledTexImageUnit + 1; i <= old_max_unit; i++) {
_mesa_reference_texobj(&ctx->Texture.Unit[i]._Current, NULL);
}
if (!prog[MESA_SHADER_FRAGMENT] || !prog[MESA_SHADER_VERTEX])
update_texgen(ctx);
}
void GLAPIENTRY
_mesa_BindImageTexture(GLuint unit, GLuint texture, GLint level,
GLboolean layered, GLint layer, GLenum access,
GLenum format)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_object *t = NULL;
struct gl_image_unit *u;
if (!validate_bind_image_texture(ctx, unit, texture, level,
layered, layer, access, format))
return;
u = &ctx->ImageUnits[unit];
FLUSH_VERTICES(ctx, 0);
ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
if (texture) {
t = _mesa_lookup_texture(ctx, texture);
if (!t) {
_mesa_error(ctx, GL_INVALID_VALUE, "glBindImageTexture(texture)");
return;
}
_mesa_reference_texobj(&u->TexObj, t);
u->Level = level;
u->Access = access;
u->Format = format;
u->_ActualFormat = get_image_format(format);
if (_mesa_tex_target_is_layered(t->Target)) {
u->Layered = layered;
u->Layer = (layered ? 0 : layer);
} else {
u->Layered = GL_FALSE;
u->Layer = 0;
}
} else {
_mesa_reference_texobj(&u->TexObj, NULL);
}
u->_Valid = validate_image_unit(ctx, u);
if (ctx->Driver.BindImageTexture)
ctx->Driver.BindImageTexture(ctx, u, t, level, layered,
layer, access, format);
}
/**
* Free all the data hanging off the given gl_framebuffer, but don't free
* the gl_framebuffer object itself.
*/
void
_mesa_free_framebuffer_data(struct gl_framebuffer *fb)
{
GLuint i;
assert(fb);
assert(fb->RefCount == 0);
_glthread_DESTROY_MUTEX(fb->Mutex);
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
if (att->Renderbuffer) {
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
}
if (att->Texture) {
_mesa_reference_texobj(&att->Texture, NULL);
}
ASSERT(!att->Renderbuffer);
ASSERT(!att->Texture);
att->Type = GL_NONE;
}
/* unbind _Depth/_StencilBuffer to decr ref counts */
_mesa_reference_renderbuffer(&fb->_DepthBuffer, NULL);
_mesa_reference_renderbuffer(&fb->_StencilBuffer, NULL);
}
/**
* Bind a texture object to an attachment point.
* The previous binding, if any, will be removed first.
*/
void
_mesa_set_texture_attachment(GLcontext *ctx,
struct gl_framebuffer *fb,
struct gl_renderbuffer_attachment *att,
struct gl_texture_object *texObj,
GLenum texTarget, GLuint level, GLuint zoffset)
{
if (att->Texture == texObj) {
/* re-attaching same texture */
ASSERT(att->Type == GL_TEXTURE);
}
else {
/* new attachment */
_mesa_remove_attachment(ctx, att);
att->Type = GL_TEXTURE;
assert(!att->Texture);
_mesa_reference_texobj(&att->Texture, texObj);
}
/* always update these fields */
att->TextureLevel = level;
if (IS_CUBE_FACE(texTarget)) {
att->CubeMapFace = texTarget - GL_TEXTURE_CUBE_MAP_POSITIVE_X;
}
else {
att->CubeMapFace = 0;
}
att->Zoffset = zoffset;
att->Complete = GL_FALSE;
if (att->Texture->Image[att->CubeMapFace][att->TextureLevel]) {
ctx->Driver.RenderTexture(ctx, fb, att);
}
}
void GLAPIENTRY
_mesa_VDPAUUnregisterSurfaceNV(GLintptr surface)
{
struct vdp_surface *surf = (struct vdp_surface *)surface;
struct set_entry *entry;
int i;
GET_CURRENT_CONTEXT(ctx);
if (!ctx->vdpDevice || !ctx->vdpGetProcAddress || !ctx->vdpSurfaces) {
_mesa_error(ctx, GL_INVALID_OPERATION, "VDPAUUnregisterSurfaceNV");
return;
}
/* according to the spec it's ok when this is zero */
if (surface == 0)
return;
entry = _mesa_set_search(ctx->vdpSurfaces, surf);
if (!entry) {
_mesa_error(ctx, GL_INVALID_VALUE, "VDPAUUnregisterSurfaceNV");
return;
}
for (i = 0; i < MAX_TEXTURES; i++) {
if (surf->textures[i]) {
surf->textures[i]->Immutable = GL_FALSE;
_mesa_reference_texobj(&surf->textures[i], NULL);
}
}
_mesa_set_remove(ctx->vdpSurfaces, entry);
free(surf);
}
/**
* Used by glXCopyContext to copy texture state from one context to another.
*/
void
_mesa_copy_texture_state( const struct gl_context *src, struct gl_context *dst )
{
GLuint u, tex;
assert(src);
assert(dst);
dst->Texture.CurrentUnit = src->Texture.CurrentUnit;
dst->Texture._GenFlags = src->Texture._GenFlags;
dst->Texture._TexGenEnabled = src->Texture._TexGenEnabled;
dst->Texture._TexMatEnabled = src->Texture._TexMatEnabled;
/* per-unit state */
for (u = 0; u < src->Const.MaxCombinedTextureImageUnits; u++) {
dst->Texture.Unit[u].LodBias = src->Texture.Unit[u].LodBias;
/*
* XXX strictly speaking, we should compare texture names/ids and
* bind textures in the dest context according to id. For now, only
* copy bindings if the contexts share the same pool of textures to
* avoid refcounting bugs.
*/
if (dst->Shared == src->Shared) {
/* copy texture object bindings, not contents of texture objects */
_mesa_lock_context_textures(dst);
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&dst->Texture.Unit[u].CurrentTex[tex],
src->Texture.Unit[u].CurrentTex[tex]);
if (src->Texture.Unit[u].CurrentTex[tex]) {
dst->Texture.NumCurrentTexUsed =
MAX2(dst->Texture.NumCurrentTexUsed, u + 1);
}
}
dst->Texture.Unit[u]._BoundTextures = src->Texture.Unit[u]._BoundTextures;
_mesa_unlock_context_textures(dst);
}
}
for (u = 0; u < src->Const.MaxTextureCoordUnits; u++) {
dst->Texture.FixedFuncUnit[u].Enabled = src->Texture.FixedFuncUnit[u].Enabled;
dst->Texture.FixedFuncUnit[u].EnvMode = src->Texture.FixedFuncUnit[u].EnvMode;
COPY_4V(dst->Texture.FixedFuncUnit[u].EnvColor, src->Texture.FixedFuncUnit[u].EnvColor);
dst->Texture.FixedFuncUnit[u].TexGenEnabled = src->Texture.FixedFuncUnit[u].TexGenEnabled;
dst->Texture.FixedFuncUnit[u].GenS = src->Texture.FixedFuncUnit[u].GenS;
dst->Texture.FixedFuncUnit[u].GenT = src->Texture.FixedFuncUnit[u].GenT;
dst->Texture.FixedFuncUnit[u].GenR = src->Texture.FixedFuncUnit[u].GenR;
dst->Texture.FixedFuncUnit[u].GenQ = src->Texture.FixedFuncUnit[u].GenQ;
/* GL_EXT_texture_env_combine */
dst->Texture.FixedFuncUnit[u].Combine = src->Texture.FixedFuncUnit[u].Combine;
}
}
/**
* Delete named textures.
*
* \param n number of textures to be deleted.
* \param textures array of texture IDs to be deleted.
*
* \sa glDeleteTextures().
*
* If we're about to delete a texture that's currently bound to any
* texture unit, unbind the texture first. Decrement the reference
* count on the texture object and delete it if it's zero.
* Recall that texture objects can be shared among several rendering
* contexts.
*/
void GLAPIENTRY
_mesa_DeleteTextures( GLsizei n, const GLuint *textures)
{
GET_CURRENT_CONTEXT(ctx);
GLint i;
if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "glDeleteTextures %d\n", n);
FLUSH_VERTICES(ctx, 0); /* too complex */
if (!textures)
return;
for (i = 0; i < n; i++) {
if (textures[i] > 0) {
struct gl_texture_object *delObj
= _mesa_lookup_texture(ctx, textures[i]);
if (delObj) {
_mesa_lock_texture(ctx, delObj);
/* Check if texture is bound to any framebuffer objects.
* If so, unbind.
* See section 4.4.2.3 of GL_EXT_framebuffer_object.
*/
unbind_texobj_from_fbo(ctx, delObj);
/* Check if this texture is currently bound to any texture units.
* If so, unbind it.
*/
unbind_texobj_from_texunits(ctx, delObj);
_mesa_unlock_texture(ctx, delObj);
ctx->NewState |= _NEW_TEXTURE;
/* The texture _name_ is now free for re-use.
* Remove it from the hash table now.
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
/* Unreference the texobj. If refcount hits zero, the texture
* will be deleted.
*/
_mesa_reference_texobj(&delObj, NULL);
}
}
}
}
/**
* Update the default texture objects in the given context to reference those
* specified in the shared state and release those referencing the old
* shared state.
*/
void
_mesa_update_default_objects_texture(struct gl_context *ctx)
{
GLuint u, tex;
for (u = 0; u < ARRAY_SIZE(ctx->Texture.Unit); u++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u];
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&texUnit->CurrentTex[tex],
ctx->Shared->DefaultTex[tex]);
}
}
}
/**
* Used by glXCopyContext to copy texture state from one context to another.
*/
void
_mesa_copy_texture_state( const GLcontext *src, GLcontext *dst )
{
GLuint u, tex;
ASSERT(src);
ASSERT(dst);
dst->Texture.CurrentUnit = src->Texture.CurrentUnit;
dst->Texture._GenFlags = src->Texture._GenFlags;
dst->Texture._TexGenEnabled = src->Texture._TexGenEnabled;
dst->Texture._TexMatEnabled = src->Texture._TexMatEnabled;
dst->Texture.SharedPalette = src->Texture.SharedPalette;
/* per-unit state */
for (u = 0; u < src->Const.MaxTextureImageUnits; u++) {
dst->Texture.Unit[u].Enabled = src->Texture.Unit[u].Enabled;
dst->Texture.Unit[u].EnvMode = src->Texture.Unit[u].EnvMode;
COPY_4V(dst->Texture.Unit[u].EnvColor, src->Texture.Unit[u].EnvColor);
dst->Texture.Unit[u].TexGenEnabled = src->Texture.Unit[u].TexGenEnabled;
dst->Texture.Unit[u].GenS = src->Texture.Unit[u].GenS;
dst->Texture.Unit[u].GenT = src->Texture.Unit[u].GenT;
dst->Texture.Unit[u].GenR = src->Texture.Unit[u].GenR;
dst->Texture.Unit[u].GenQ = src->Texture.Unit[u].GenQ;
dst->Texture.Unit[u].LodBias = src->Texture.Unit[u].LodBias;
/* GL_EXT_texture_env_combine */
dst->Texture.Unit[u].Combine = src->Texture.Unit[u].Combine;
/* GL_ATI_envmap_bumpmap - need this? */
dst->Texture.Unit[u].BumpTarget = src->Texture.Unit[u].BumpTarget;
COPY_4V(dst->Texture.Unit[u].RotMatrix, src->Texture.Unit[u].RotMatrix);
/*
* XXX strictly speaking, we should compare texture names/ids and
* bind textures in the dest context according to id. For now, only
* copy bindings if the contexts share the same pool of textures to
* avoid refcounting bugs.
*/
if (dst->Shared == src->Shared) {
/* copy texture object bindings, not contents of texture objects */
_mesa_lock_context_textures(dst);
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&dst->Texture.Unit[u].CurrentTex[tex],
src->Texture.Unit[u].CurrentTex[tex]);
}
_mesa_unlock_context_textures(dst);
}
}
}
static inline void
update_single_program_texture_state(struct gl_context *ctx,
struct gl_program *prog,
int unit,
BITSET_WORD *enabled_texture_units)
{
struct gl_texture_object *texObj;
texObj = update_single_program_texture(ctx, prog, unit);
_mesa_reference_texobj(&ctx->Texture.Unit[unit]._Current, texObj);
BITSET_SET(enabled_texture_units, unit);
ctx->Texture._MaxEnabledTexImageUnit =
MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
}
/**
* Check if the given texture object is bound to any texture image units and
* unbind it if so (revert to default textures).
*/
static void
unbind_texobj_from_texunits(struct gl_context *ctx,
struct gl_texture_object *texObj)
{
GLuint tex;
struct gl_texture_unit *unit = &ctx->Texture.Unit;
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
if (texObj == unit->CurrentTex[tex]) {
_mesa_reference_texobj(&unit->CurrentTex[tex],
ctx->Shared->DefaultTex[tex]);
ASSERT(unit->CurrentTex[tex]);
break;
}
}
}
/**
* Used by glXCopyContext to copy texture state from one context to another.
*/
void
_mesa_copy_texture_state( const GLcontext *src, GLcontext *dst )
{
GLuint u, tex;
ASSERT(src);
ASSERT(dst);
dst->Texture.CurrentUnit = src->Texture.CurrentUnit;
dst->Texture._GenFlags = src->Texture._GenFlags;
dst->Texture._TexGenEnabled = src->Texture._TexGenEnabled;
dst->Texture._TexMatEnabled = src->Texture._TexMatEnabled;
dst->Texture.SharedPalette = src->Texture.SharedPalette;
/* per-unit state */
for (u = 0; u < src->Const.MaxTextureImageUnits; u++) {
dst->Texture.Unit[u].Enabled = src->Texture.Unit[u].Enabled;
dst->Texture.Unit[u].EnvMode = src->Texture.Unit[u].EnvMode;
COPY_4V(dst->Texture.Unit[u].EnvColor, src->Texture.Unit[u].EnvColor);
dst->Texture.Unit[u].TexGenEnabled = src->Texture.Unit[u].TexGenEnabled;
dst->Texture.Unit[u].GenS = src->Texture.Unit[u].GenS;
dst->Texture.Unit[u].GenT = src->Texture.Unit[u].GenT;
dst->Texture.Unit[u].GenR = src->Texture.Unit[u].GenR;
dst->Texture.Unit[u].GenQ = src->Texture.Unit[u].GenQ;
dst->Texture.Unit[u].LodBias = src->Texture.Unit[u].LodBias;
/* GL_EXT_texture_env_combine */
dst->Texture.Unit[u].Combine = src->Texture.Unit[u].Combine;
/* GL_ATI_envmap_bumpmap - need this? */
dst->Texture.Unit[u].BumpTarget = src->Texture.Unit[u].BumpTarget;
COPY_4V(dst->Texture.Unit[u].RotMatrix, src->Texture.Unit[u].RotMatrix);
/* copy texture object bindings, not contents of texture objects */
_mesa_lock_context_textures(dst);
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&dst->Texture.Unit[u].CurrentTex[tex],
src->Texture.Unit[u].CurrentTex[tex]);
}
_mesa_unlock_context_textures(dst);
}
}
/**
* Delete named textures.
*
* \param n number of textures to be deleted.
* \param textures array of texture IDs to be deleted.
*
* \sa glDeleteTextures().
*
* If we're about to delete a texture that's currently bound to any
* texture unit, unbind the texture first. Decrement the reference
* count on the texture object and delete it if it's zero.
* Recall that texture objects can be shared among several rendering
* contexts.
*/
void GLAPIENTRY
_mesa_DeleteTextures( GLsizei n, const GLuint *textures)
{
GET_CURRENT_CONTEXT(ctx);
GLint i;
ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); /* too complex */
if (!textures)
return;
for (i = 0; i < n; i++) {
if (textures[i] > 0) {
struct gl_texture_object *delObj
= _mesa_lookup_texture(ctx, textures[i]);
if (delObj) {
_mesa_lock_texture(ctx, delObj);
/* Check if this texture is currently bound to any texture units.
* If so, unbind it.
*/
unbind_texobj_from_texunits(ctx, delObj);
_mesa_unlock_texture(ctx, delObj);
ctx->NewState |= _NEW_TEXTURE;
/* The texture _name_ is now free for re-use.
* Remove it from the hash table now.
*/
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_HashRemove(ctx->Shared->TexObjects, delObj->Name);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
/* Unreference the texobj. If refcount hits zero, the texture
* will be deleted.
*/
_mesa_reference_texobj(&delObj, NULL);
}
}
}
}
/**
* Remove any texture or renderbuffer attached to the given attachment
* point. Update reference counts, etc.
*/
void
_mesa_remove_attachment(GLcontext *ctx, struct gl_renderbuffer_attachment *att)
{
if (att->Type == GL_TEXTURE) {
ASSERT(att->Texture);
if (ctx->Driver.FinishRenderTexture) {
/* tell driver we're done rendering to this texobj */
ctx->Driver.FinishRenderTexture(ctx, att);
}
_mesa_reference_texobj(&att->Texture, NULL); /* unbind */
ASSERT(!att->Texture);
}
if (att->Type == GL_TEXTURE || att->Type == GL_RENDERBUFFER_EXT) {
ASSERT(!att->Texture);
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* unbind */
ASSERT(!att->Renderbuffer);
}
att->Type = GL_NONE;
att->Complete = GL_TRUE;
}
/**
* Initialize a texture unit.
*
* \param ctx GL context.
* \param unit texture unit number to be initialized.
*/
static void
init_texture_unit( struct gl_context *ctx, GLuint unit )
{
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
GLuint tex;
texUnit->EnvMode = GL_MODULATE;
ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
texUnit->Combine = default_combine_state;
texUnit->_EnvMode = default_combine_state;
texUnit->_CurrentCombine = & texUnit->_EnvMode;
texUnit->TexGenEnabled = 0x0;
texUnit->GenS.Mode = GL_EYE_LINEAR;
texUnit->GenT.Mode = GL_EYE_LINEAR;
texUnit->GenR.Mode = GL_EYE_LINEAR;
texUnit->GenQ.Mode = GL_EYE_LINEAR;
texUnit->GenS._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenT._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenR._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenQ._ModeBit = TEXGEN_EYE_LINEAR;
/* Yes, these plane coefficients are correct! */
ASSIGN_4V( texUnit->GenS.ObjectPlane, 1.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenT.ObjectPlane, 0.0, 1.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenR.ObjectPlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenQ.ObjectPlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenS.EyePlane, 1.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenT.EyePlane, 0.0, 1.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenR.EyePlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenQ.EyePlane, 0.0, 0.0, 0.0, 0.0 );
/* initialize current texture object ptrs to the shared default objects */
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&texUnit->CurrentTex[tex],
ctx->Shared->DefaultTex[tex]);
}
texUnit->_BoundTextures = 0;
}
static void
fix_missing_textures_for_atifs(struct gl_context *ctx,
struct gl_program *prog,
BITSET_WORD *enabled_texture_units)
{
GLbitfield mask = prog->SamplersUsed;
while (mask) {
const int s = u_bit_scan(&mask);
const int unit = prog->SamplerUnits[s];
const gl_texture_index target_index = ffs(prog->TexturesUsed[unit]) - 1;
if (!ctx->Texture.Unit[unit]._Current) {
struct gl_texture_object *texObj =
_mesa_get_fallback_texture(ctx, target_index);
_mesa_reference_texobj(&ctx->Texture.Unit[unit]._Current, texObj);
BITSET_SET(enabled_texture_units, unit);
ctx->Texture._MaxEnabledTexImageUnit =
MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
}
}
}
/**
* Free all the data hanging off the given gl_framebuffer, but don't free
* the gl_framebuffer object itself.
*/
void
_mesa_free_framebuffer_data(struct gl_framebuffer *fb)
{
GLuint i;
assert(fb);
assert(fb->RefCount == 0);
mtx_destroy(&fb->Mutex);
for (i = 0; i < BUFFER_COUNT; i++) {
struct gl_renderbuffer_attachment *att = &fb->Attachment[i];
if (att->Renderbuffer) {
_mesa_reference_renderbuffer(&att->Renderbuffer, NULL);
}
if (att->Texture) {
_mesa_reference_texobj(&att->Texture, NULL);
}
assert(!att->Renderbuffer);
assert(!att->Texture);
att->Type = GL_NONE;
}
}
static void
update_program_texture_state(struct gl_context *ctx, struct gl_program **prog,
BITSET_WORD *enabled_texture_units)
{
int i;
for (i = 0; i < MESA_SHADER_STAGES; i++) {
int s;
if (!prog[i])
continue;
/* We can't only do the shifting trick as the loop condition because if
* sampler 31 is active, the next iteration tries to shift by 32, which is
* undefined.
*/
for (s = 0; s < MAX_SAMPLERS && (1 << s) <= prog[i]->SamplersUsed; s++) {
struct gl_texture_object *texObj;
texObj = update_single_program_texture(ctx, prog[i], s);
if (texObj) {
int unit = prog[i]->SamplerUnits[s];
_mesa_reference_texobj(&ctx->Texture.Unit[unit]._Current, texObj);
BITSET_SET(enabled_texture_units, unit);
ctx->Texture._MaxEnabledTexImageUnit =
MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
}
}
}
if (prog[MESA_SHADER_FRAGMENT]) {
const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
ctx->Texture._EnabledCoordUnits |=
(prog[MESA_SHADER_FRAGMENT]->InputsRead >> VARYING_SLOT_TEX0) &
coordMask;
}
}
static GLintptr
register_surface(struct gl_context *ctx, GLboolean isOutput,
const GLvoid *vdpSurface, GLenum target,
GLsizei numTextureNames, const GLuint *textureNames)
{
struct vdp_surface *surf;
int i;
if (!ctx->vdpDevice || !ctx->vdpGetProcAddress || !ctx->vdpSurfaces) {
_mesa_error(ctx, GL_INVALID_OPERATION, "VDPAURegisterSurfaceNV");
return (GLintptr)NULL;
}
if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE) {
_mesa_error(ctx, GL_INVALID_ENUM, "VDPAURegisterSurfaceNV");
return (GLintptr)NULL;
}
if (target == GL_TEXTURE_RECTANGLE && !ctx->Extensions.NV_texture_rectangle) {
_mesa_error(ctx, GL_INVALID_ENUM, "VDPAURegisterSurfaceNV");
return (GLintptr)NULL;
}
surf = CALLOC_STRUCT( vdp_surface );
if (surf == NULL) {
_mesa_error_no_memory("VDPAURegisterSurfaceNV");
return (GLintptr)NULL;
}
surf->vdpSurface = vdpSurface;
surf->target = target;
surf->access = GL_READ_WRITE;
surf->state = GL_SURFACE_REGISTERED_NV;
surf->output = isOutput;
for (i = 0; i < numTextureNames; ++i) {
struct gl_texture_object *tex;
tex = _mesa_lookup_texture(ctx, textureNames[i]);
if (tex == NULL) {
free(surf);
_mesa_error(ctx, GL_INVALID_OPERATION,
"VDPAURegisterSurfaceNV(texture ID not found)");
return (GLintptr)NULL;
}
_mesa_lock_texture(ctx, tex);
if (tex->Immutable) {
_mesa_unlock_texture(ctx, tex);
free(surf);
_mesa_error(ctx, GL_INVALID_OPERATION,
"VDPAURegisterSurfaceNV(texture is immutable)");
return (GLintptr)NULL;
}
if (tex->Target == 0)
tex->Target = target;
else if (tex->Target != target) {
_mesa_unlock_texture(ctx, tex);
free(surf);
_mesa_error(ctx, GL_INVALID_OPERATION,
"VDPAURegisterSurfaceNV(target mismatch)");
return (GLintptr)NULL;
}
/* This will disallow respecifying the storage. */
tex->Immutable = GL_TRUE;
_mesa_unlock_texture(ctx, tex);
_mesa_reference_texobj(&surf->textures[i], tex);
}
_mesa_set_add(ctx->vdpSurfaces, surf);
return (GLintptr)surf;
}
void GLAPIENTRY
_mesa_BindImageTextures(GLuint first, GLsizei count, const GLuint *textures)
{
GET_CURRENT_CONTEXT(ctx);
int i;
if (!ctx->Extensions.ARB_shader_image_load_store) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBindImageTextures()");
return;
}
if (first + count > ctx->Const.MaxImageUnits) {
/* The ARB_multi_bind spec says:
*
* "An INVALID_OPERATION error is generated if <first> + <count>
* is greater than the number of image units supported by
* the implementation."
*/
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindImageTextures(first=%u + count=%d > the value of "
"GL_MAX_IMAGE_UNITS=%u)",
first, count, ctx->Const.MaxImageUnits);
return;
}
/* Assume that at least one binding will be changed */
FLUSH_VERTICES(ctx, 0);
ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
/* Note that the error semantics for multi-bind commands differ from
* those of other GL commands.
*
* The Issues section in the ARB_multi_bind spec says:
*
* "(11) Typically, OpenGL specifies that if an error is generated by
* a command, that command has no effect. This is somewhat
* unfortunate for multi-bind commands, because it would require
* a first pass to scan the entire list of bound objects for
* errors and then a second pass to actually perform the
* bindings. Should we have different error semantics?
*
* RESOLVED: Yes. In this specification, when the parameters for
* one of the <count> binding points are invalid, that binding
* point is not updated and an error will be generated. However,
* other binding points in the same command will be updated if
* their parameters are valid and no other error occurs."
*/
_mesa_begin_texture_lookups(ctx);
for (i = 0; i < count; i++) {
struct gl_image_unit *u = &ctx->ImageUnits[first + i];
const GLuint texture = textures ? textures[i] : 0;
if (texture != 0) {
struct gl_texture_object *texObj;
GLenum tex_format;
if (!u->TexObj || u->TexObj->Name != texture) {
texObj = _mesa_lookup_texture_locked(ctx, texture);
if (!texObj) {
/* The ARB_multi_bind spec says:
*
* "An INVALID_OPERATION error is generated if any value
* in <textures> is not zero or the name of an existing
* texture object (per binding)."
*/
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindImageTextures(textures[%d]=%u "
"is not zero or the name of an existing texture "
"object)", i, texture);
continue;
}
} else {
texObj = u->TexObj;
}
if (texObj->Target == GL_TEXTURE_BUFFER) {
tex_format = texObj->BufferObjectFormat;
} else {
struct gl_texture_image *image = texObj->Image[0][0];
if (!image || image->Width == 0 || image->Height == 0 ||
image->Depth == 0) {
/* The ARB_multi_bind spec says:
*
* "An INVALID_OPERATION error is generated if the width,
* height, or depth of the level zero texture image of
* any texture in <textures> is zero (per binding)."
*/
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindImageTextures(the width, height or depth "
"of the level zero texture image of "
"textures[%d]=%u is zero)", i, texture);
continue;
}
tex_format = image->InternalFormat;
}
if (_mesa_get_shader_image_format(tex_format) == MESA_FORMAT_NONE) {
/* The ARB_multi_bind spec says:
*
* "An INVALID_OPERATION error is generated if the internal
* format of the level zero texture image of any texture
* in <textures> is not found in table 8.33 (per binding)."
*/
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindImageTextures(the internal format %s of "
"the level zero texture image of textures[%d]=%u "
"is not supported)",
_mesa_lookup_enum_by_nr(tex_format),
i, texture);
continue;
}
/* Update the texture binding */
_mesa_reference_texobj(&u->TexObj, texObj);
u->Level = 0;
u->Layered = _mesa_tex_target_is_layered(texObj->Target);
u->Layer = 0;
u->Access = GL_READ_WRITE;
u->Format = tex_format;
u->_ActualFormat = _mesa_get_shader_image_format(tex_format);
u->_Valid = validate_image_unit(ctx, u);
} else {
/* Unbind the texture from the unit */
_mesa_reference_texobj(&u->TexObj, NULL);
u->Level = 0;
u->Layered = GL_FALSE;
u->Layer = 0;
u->Access = GL_READ_ONLY;
u->Format = GL_R8;
u->_ActualFormat = MESA_FORMAT_R_UNORM8;
u->_Valid = GL_FALSE;
}
/* Pass the BindImageTexture call down to the device driver */
if (ctx->Driver.BindImageTexture)
ctx->Driver.BindImageTexture(ctx, u, u->TexObj, u->Level, u->Layered,
u->Layer, u->Access, u->Format);
}
_mesa_end_texture_lookups(ctx);
}
/**
* Enter meta state. This is like a light-weight version of glPushAttrib
* but it also resets most GL state back to default values.
*
* \param state bitmask of MESA_META_* flags indicating which attribute groups
* to save and reset to their defaults
*/
void
_mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
{
struct save_state *save;
/* hope MAX_META_OPS_DEPTH is large enough */
assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
memset(save, 0, sizeof(*save));
save->SavedState = state;
if (state & MESA_META_ALPHA_TEST) {
save->AlphaEnabled = ctx->Color.AlphaEnabled;
save->AlphaFunc = ctx->Color.AlphaFunc;
save->AlphaRef = ctx->Color.AlphaRef;
if (ctx->Color.AlphaEnabled)
_mesa_set_enable(ctx, GL_ALPHA_TEST, GL_FALSE);
}
if (state & MESA_META_BLEND) {
save->BlendEnabled = ctx->Color.BlendEnabled;
if (ctx->Color.BlendEnabled) {
_mesa_set_enable(ctx, GL_BLEND, GL_FALSE);
}
save->ColorLogicOpEnabled = ctx->Color.ColorLogicOpEnabled;
if (ctx->Color.ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, GL_FALSE);
}
if (state & MESA_META_COLOR_MASK) {
memcpy(save->ColorMask, ctx->Color.ColorMask,
sizeof(ctx->Color.ColorMask));
if (!ctx->Color.ColorMask[0] ||
!ctx->Color.ColorMask[1] ||
!ctx->Color.ColorMask[2] ||
!ctx->Color.ColorMask[3])
_mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
}
if (state & MESA_META_DEPTH_TEST) {
save->Depth = ctx->Depth; /* struct copy */
if (ctx->Depth.Test)
_mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
}
if (state & MESA_META_FOG) {
save->Fog = ctx->Fog.Enabled;
if (ctx->Fog.Enabled)
_mesa_set_enable(ctx, GL_FOG, GL_FALSE);
}
if (state & MESA_META_PIXEL_STORE) {
save->Pack = ctx->Pack;
save->Unpack = ctx->Unpack;
ctx->Pack = ctx->DefaultPacking;
ctx->Unpack = ctx->DefaultPacking;
}
if (state & MESA_META_PIXEL_TRANSFER) {
save->RedScale = ctx->Pixel.RedScale;
save->RedBias = ctx->Pixel.RedBias;
save->GreenScale = ctx->Pixel.GreenScale;
save->GreenBias = ctx->Pixel.GreenBias;
save->BlueScale = ctx->Pixel.BlueScale;
save->BlueBias = ctx->Pixel.BlueBias;
save->AlphaScale = ctx->Pixel.AlphaScale;
save->AlphaBias = ctx->Pixel.AlphaBias;
save->MapColorFlag = ctx->Pixel.MapColorFlag;
ctx->Pixel.RedScale = 1.0F;
ctx->Pixel.RedBias = 0.0F;
ctx->Pixel.GreenScale = 1.0F;
ctx->Pixel.GreenBias = 0.0F;
ctx->Pixel.BlueScale = 1.0F;
ctx->Pixel.BlueBias = 0.0F;
ctx->Pixel.AlphaScale = 1.0F;
ctx->Pixel.AlphaBias = 0.0F;
ctx->Pixel.MapColorFlag = GL_FALSE;
/* XXX more state */
ctx->NewState |=_NEW_PIXEL;
}
if (state & MESA_META_RASTERIZATION) {
save->FrontPolygonMode = ctx->Polygon.FrontMode;
save->BackPolygonMode = ctx->Polygon.BackMode;
save->PolygonOffset = ctx->Polygon.OffsetFill;
save->PolygonSmooth = ctx->Polygon.SmoothFlag;
save->PolygonStipple = ctx->Polygon.StippleFlag;
save->PolygonCull = ctx->Polygon.CullFlag;
_mesa_PolygonMode(GL_FRONT_AND_BACK, GL_FILL);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, GL_FALSE);
_mesa_set_enable(ctx, GL_POLYGON_SMOOTH, GL_FALSE);
_mesa_set_enable(ctx, GL_POLYGON_STIPPLE, GL_FALSE);
_mesa_set_enable(ctx, GL_CULL_FACE, GL_FALSE);
}
if (state & MESA_META_SCISSOR) {
save->Scissor = ctx->Scissor; /* struct copy */
_mesa_set_enable(ctx, GL_SCISSOR_TEST, GL_FALSE);
}
if (state & MESA_META_STENCIL_TEST) {
save->Stencil = ctx->Stencil; /* struct copy */
if (ctx->Stencil.Enabled)
_mesa_set_enable(ctx, GL_STENCIL_TEST, GL_FALSE);
/* NOTE: other stencil state not reset */
}
if (state & MESA_META_TEXTURE) {
GLuint tgt;
save->EnvMode = ctx->Texture.Unit.EnvMode;
/* Disable all texture units */
save->TexEnabled = ctx->Texture.Unit.Enabled;
save->TexGenEnabled = ctx->Texture.Unit.TexGenEnabled;
if (ctx->Texture.Unit.Enabled ||
ctx->Texture.Unit.TexGenEnabled) {
_mesa_set_enable(ctx, GL_TEXTURE_1D, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_2D, GL_FALSE);
if (ctx->Extensions.ARB_texture_cube_map)
_mesa_set_enable(ctx, GL_TEXTURE_CUBE_MAP, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_S, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_T, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_R, GL_FALSE);
_mesa_set_enable(ctx, GL_TEXTURE_GEN_Q, GL_FALSE);
}
/* save current texture objects for unit[0] only */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
_mesa_reference_texobj(&save->CurrentTexture[tgt],
ctx->Texture.Unit.CurrentTex[tgt]);
}
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
if (state & MESA_META_TRANSFORM) {
memcpy(save->ModelviewMatrix, ctx->ModelviewMatrixStack.Top->m,
16 * sizeof(GLfloat));
memcpy(save->ProjectionMatrix, ctx->ProjectionMatrixStack.Top->m,
16 * sizeof(GLfloat));
memcpy(save->TextureMatrix, ctx->TextureMatrixStack.Top->m,
16 * sizeof(GLfloat));
save->MatrixMode = ctx->Transform.MatrixMode;
/* set 1:1 vertex:pixel coordinate transform */
_mesa_MatrixMode(GL_TEXTURE);
_mesa_LoadIdentity();
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_LoadIdentity();
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadIdentity();
_mesa_Ortho(0.0, ctx->DrawBuffer->Width,
0.0, ctx->DrawBuffer->Height,
-1.0, 1.0);
}
if (state & MESA_META_CLIP) {
save->ClipPlanesEnabled = ctx->Transform.ClipPlanesEnabled;
if (ctx->Transform.ClipPlanesEnabled) {
GLuint i;
for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_FALSE);
}
}
}
if (state & MESA_META_VIEWPORT) {
/* save viewport state */
save->ViewportX = ctx->Viewport.X;
save->ViewportY = ctx->Viewport.Y;
save->ViewportW = ctx->Viewport.Width;
save->ViewportH = ctx->Viewport.Height;
/* set viewport to match window size */
if (ctx->Viewport.X != 0 ||
ctx->Viewport.Y != 0 ||
ctx->Viewport.Width != ctx->DrawBuffer->Width ||
ctx->Viewport.Height != ctx->DrawBuffer->Height) {
_mesa_set_viewport(ctx, 0, 0,
ctx->DrawBuffer->Width, ctx->DrawBuffer->Height);
}
/* save depth range state */
save->DepthNear = ctx->Viewport.Near;
save->DepthFar = ctx->Viewport.Far;
/* set depth range to default */
_mesa_DepthRange(0.0, 1.0);
}
if (state & MESA_META_SELECT_FEEDBACK) {
save->RenderMode = ctx->RenderMode;
if (ctx->RenderMode == GL_SELECT) {
save->Select = ctx->Select; /* struct copy */
_mesa_RenderMode(GL_RENDER);
} else if (ctx->RenderMode == GL_FEEDBACK) {
save->Feedback = ctx->Feedback; /* struct copy */
_mesa_RenderMode(GL_RENDER);
}
}
/* misc */
{
save->Lighting = ctx->Light.Enabled;
if (ctx->Light.Enabled)
_mesa_set_enable(ctx, GL_LIGHTING, GL_FALSE);
save->RasterDiscard = ctx->RasterDiscard;
if (ctx->RasterDiscard)
_mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_FALSE);
}
}
/**
* Leave meta state. This is like a light-weight version of glPopAttrib().
*/
void
_mesa_meta_end(struct gl_context *ctx)
{
struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];
const GLbitfield state = save->SavedState;
if (state & MESA_META_ALPHA_TEST) {
if (ctx->Color.AlphaEnabled != save->AlphaEnabled)
_mesa_set_enable(ctx, GL_ALPHA_TEST, save->AlphaEnabled);
_mesa_AlphaFunc(save->AlphaFunc, save->AlphaRef);
}
if (state & MESA_META_BLEND) {
if (ctx->Color.BlendEnabled != save->BlendEnabled) {
_mesa_set_enable(ctx, GL_BLEND, (save->BlendEnabled & 1));
}
if (ctx->Color.ColorLogicOpEnabled != save->ColorLogicOpEnabled)
_mesa_set_enable(ctx, GL_COLOR_LOGIC_OP, save->ColorLogicOpEnabled);
}
if (state & MESA_META_COLOR_MASK) {
if (!TEST_EQ_4V(ctx->Color.ColorMask, save->ColorMask)) {
_mesa_ColorMask(save->ColorMask[0], save->ColorMask[1],
save->ColorMask[2], save->ColorMask[3]);
}
}
if (state & MESA_META_DEPTH_TEST) {
if (ctx->Depth.Test != save->Depth.Test)
_mesa_set_enable(ctx, GL_DEPTH_TEST, save->Depth.Test);
_mesa_DepthFunc(save->Depth.Func);
_mesa_DepthMask(save->Depth.Mask);
}
if (state & MESA_META_FOG) {
_mesa_set_enable(ctx, GL_FOG, save->Fog);
}
if (state & MESA_META_PIXEL_STORE) {
ctx->Pack = save->Pack;
ctx->Unpack = save->Unpack;
}
if (state & MESA_META_PIXEL_TRANSFER) {
ctx->Pixel.RedScale = save->RedScale;
ctx->Pixel.RedBias = save->RedBias;
ctx->Pixel.GreenScale = save->GreenScale;
ctx->Pixel.GreenBias = save->GreenBias;
ctx->Pixel.BlueScale = save->BlueScale;
ctx->Pixel.BlueBias = save->BlueBias;
ctx->Pixel.AlphaScale = save->AlphaScale;
ctx->Pixel.AlphaBias = save->AlphaBias;
ctx->Pixel.MapColorFlag = save->MapColorFlag;
/* XXX more state */
ctx->NewState |=_NEW_PIXEL;
}
if (state & MESA_META_RASTERIZATION) {
_mesa_PolygonMode(GL_FRONT, save->FrontPolygonMode);
_mesa_PolygonMode(GL_BACK, save->BackPolygonMode);
_mesa_set_enable(ctx, GL_POLYGON_STIPPLE, save->PolygonStipple);
_mesa_set_enable(ctx, GL_POLYGON_OFFSET_FILL, save->PolygonOffset);
_mesa_set_enable(ctx, GL_POLYGON_SMOOTH, save->PolygonSmooth);
_mesa_set_enable(ctx, GL_CULL_FACE, save->PolygonCull);
}
if (state & MESA_META_SCISSOR) {
_mesa_set_enable(ctx, GL_SCISSOR_TEST, save->Scissor.Enabled);
_mesa_Scissor(save->Scissor.X, save->Scissor.Y,
save->Scissor.Width, save->Scissor.Height);
}
if (state & MESA_META_STENCIL_TEST) {
const struct gl_stencil_attrib *stencil = &save->Stencil;
_mesa_set_enable(ctx, GL_STENCIL_TEST, stencil->Enabled);
_mesa_ClearStencil(stencil->Clear);
_mesa_StencilFunc(stencil->Function,
stencil->Ref,
stencil->ValueMask);
_mesa_StencilMask(stencil->WriteMask);
_mesa_StencilOp(stencil->FailFunc, stencil->ZFailFunc, stencil->ZPassFunc);
}
if (state & MESA_META_TEXTURE) {
GLuint tgt;
/* restore texenv for unit[0] */
_mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, save->EnvMode);
/* restore texture objects for unit[0] only */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
if (ctx->Texture.Unit.CurrentTex[tgt] != save->CurrentTexture[tgt]) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
_mesa_reference_texobj(&ctx->Texture.Unit.CurrentTex[tgt],
save->CurrentTexture[tgt]);
}
_mesa_reference_texobj(&save->CurrentTexture[tgt], NULL);
}
/* Restore fixed function texture enables, texgen */
if (ctx->Texture.Unit.Enabled != save->TexEnabled) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
ctx->Texture.Unit.Enabled = save->TexEnabled;
}
if (ctx->Texture.Unit.TexGenEnabled != save->TexGenEnabled) {
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
ctx->Texture.Unit.TexGenEnabled = save->TexGenEnabled;
}
}
if (state & MESA_META_TRANSFORM) {
_mesa_MatrixMode(GL_TEXTURE);
_mesa_LoadMatrixf(save->TextureMatrix);
_mesa_MatrixMode(GL_MODELVIEW);
_mesa_LoadMatrixf(save->ModelviewMatrix);
_mesa_MatrixMode(GL_PROJECTION);
_mesa_LoadMatrixf(save->ProjectionMatrix);
_mesa_MatrixMode(save->MatrixMode);
}
if (state & MESA_META_CLIP) {
if (save->ClipPlanesEnabled) {
GLuint i;
for (i = 0; i < ctx->Const.MaxClipPlanes; i++) {
if (save->ClipPlanesEnabled & (1 << i)) {
_mesa_set_enable(ctx, GL_CLIP_PLANE0 + i, GL_TRUE);
}
}
}
}
if (state & MESA_META_VIEWPORT) {
if (save->ViewportX != ctx->Viewport.X ||
save->ViewportY != ctx->Viewport.Y ||
save->ViewportW != ctx->Viewport.Width ||
save->ViewportH != ctx->Viewport.Height) {
_mesa_set_viewport(ctx, save->ViewportX, save->ViewportY,
save->ViewportW, save->ViewportH);
}
_mesa_DepthRange(save->DepthNear, save->DepthFar);
}
/* misc */
if (save->Lighting) {
_mesa_set_enable(ctx, GL_LIGHTING, GL_TRUE);
}
if (save->RasterDiscard) {
_mesa_set_enable(ctx, GL_RASTERIZER_DISCARD, GL_TRUE);
}
}
/**
* \note This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
* flags are updated by _mesa_update_texture_matrices, above.
*
* \param ctx GL context.
*/
static void
update_texture_state( struct gl_context *ctx )
{
GLuint unit;
struct gl_program *fprog = NULL;
struct gl_program *vprog = NULL;
struct gl_program *gprog = NULL;
GLbitfield enabledFragUnits = 0x0;
if (ctx->Shader.CurrentVertexProgram &&
ctx->Shader.CurrentVertexProgram->LinkStatus) {
vprog = ctx->Shader.CurrentVertexProgram->_LinkedShaders[MESA_SHADER_VERTEX]->Program;
}
if (ctx->Shader.CurrentGeometryProgram &&
ctx->Shader.CurrentGeometryProgram->LinkStatus) {
gprog = ctx->Shader.CurrentGeometryProgram->_LinkedShaders[MESA_SHADER_GEOMETRY]->Program;
}
if (ctx->Shader.CurrentFragmentProgram &&
ctx->Shader.CurrentFragmentProgram->LinkStatus) {
fprog = ctx->Shader.CurrentFragmentProgram->_LinkedShaders[MESA_SHADER_FRAGMENT]->Program;
}
else if (ctx->FragmentProgram._Enabled) {
fprog = &ctx->FragmentProgram.Current->Base;
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE;
ctx->Texture._EnabledUnits = 0x0;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
/*
* Update texture unit state.
*/
for (unit = 0; unit < ctx->Const.MaxCombinedTextureImageUnits; unit++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
GLbitfield enabledVertTargets = 0x0;
GLbitfield enabledFragTargets = 0x0;
GLbitfield enabledGeomTargets = 0x0;
GLbitfield enabledTargets = 0x0;
GLuint texIndex;
/* Get the bitmask of texture target enables.
* enableBits will be a mask of the TEXTURE_*_BIT flags indicating
* which texture targets are enabled (fixed function) or referenced
* by a fragment program/program. When multiple flags are set, we'll
* settle on the one with highest priority (see below).
*/
if (vprog) {
enabledVertTargets |= vprog->TexturesUsed[unit];
}
if (gprog) {
enabledGeomTargets |= gprog->TexturesUsed[unit];
}
if (fprog) {
enabledFragTargets |= fprog->TexturesUsed[unit];
}
else {
/* fixed-function fragment program */
enabledFragTargets |= texUnit->Enabled;
}
enabledTargets = enabledVertTargets | enabledFragTargets |
enabledGeomTargets;
texUnit->_ReallyEnabled = 0x0;
if (enabledTargets == 0x0) {
/* neither vertex nor fragment processing uses this unit */
continue;
}
/* Look for the highest priority texture target that's enabled (or used
* by the vert/frag shaders) and "complete". That's the one we'll use
* for texturing.
*
* Note that the TEXTURE_x_INDEX values are in high to low priority.
*/
for (texIndex = 0; texIndex < NUM_TEXTURE_TARGETS; texIndex++) {
if (enabledTargets & (1 << texIndex)) {
struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex];
struct gl_sampler_object *sampler = texUnit->Sampler ?
texUnit->Sampler : &texObj->Sampler;
if (!_mesa_is_texture_complete(texObj, sampler)) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (_mesa_is_texture_complete(texObj, sampler)) {
texUnit->_ReallyEnabled = 1 << texIndex;
_mesa_reference_texobj(&texUnit->_Current, texObj);
break;
}
}
}
if (!texUnit->_ReallyEnabled) {
if (fprog) {
/* If we get here it means the shader is expecting a texture
* object, but there isn't one (or it's incomplete). Use the
* fallback texture.
*/
struct gl_texture_object *texObj;
gl_texture_index texTarget;
texTarget = (gl_texture_index) (ffs(enabledTargets) - 1);
texObj = _mesa_get_fallback_texture(ctx, texTarget);
assert(texObj);
if (!texObj) {
/* invalid fallback texture: don't enable the texture unit */
continue;
}
_mesa_reference_texobj(&texUnit->_Current, texObj);
texUnit->_ReallyEnabled = 1 << texTarget;
}
else {
/* fixed-function: texture unit is really disabled */
continue;
}
}
/* if we get here, we know this texture unit is enabled */
ctx->Texture._EnabledUnits |= (1 << unit);
if (enabledFragTargets)
enabledFragUnits |= (1 << unit);
if (!fprog)
update_tex_combine(ctx, texUnit);
}
/* Determine which texture coordinate sets are actually needed */
if (fprog) {
const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
ctx->Texture._EnabledCoordUnits
= (fprog->InputsRead >> VARYING_SLOT_TEX0) & coordMask;
}
else {
static void
update_ff_texture_state(struct gl_context *ctx,
BITSET_WORD *enabled_texture_units)
{
int unit;
for (unit = 0; unit < ctx->Const.MaxTextureUnits; unit++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
GLbitfield mask;
bool complete;
if (texUnit->Enabled == 0x0)
continue;
/* If a shader already dictated what texture target was used for this
* unit, just go along with it.
*/
if (BITSET_TEST(enabled_texture_units, unit))
continue;
/* From the GL 4.4 compat specification, section 16.2 ("Texture Application"):
*
* "Texturing is enabled or disabled using the generic Enable and
* Disable commands, respectively, with the symbolic constants
* TEXTURE_1D, TEXTURE_2D, TEXTURE_RECTANGLE, TEXTURE_3D, or
* TEXTURE_CUBE_MAP to enable the one-, two-, rectangular,
* three-dimensional, or cube map texture, respectively. If more
* than one of these textures is enabled, the first one enabled
* from the following list is used:
*
* • cube map texture
* • three-dimensional texture
* • rectangular texture
* • two-dimensional texture
* • one-dimensional texture"
*
* Note that the TEXTURE_x_INDEX values are in high to low priority.
* Also:
*
* "If a texture unit is disabled or has an invalid or incomplete
* texture (as defined in section 8.17) bound to it, then blending
* is disabled for that texture unit. If the texture environment
* for a given enabled texture unit references a disabled texture
* unit, or an invalid or incomplete texture that is bound to
* another unit, then the results of texture blending are
* undefined."
*/
complete = false;
mask = texUnit->Enabled;
while (mask) {
const int texIndex = u_bit_scan(&mask);
struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex];
struct gl_sampler_object *sampler = texUnit->Sampler ?
texUnit->Sampler : &texObj->Sampler;
if (!_mesa_is_texture_complete(texObj, sampler)) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (_mesa_is_texture_complete(texObj, sampler)) {
_mesa_reference_texobj(&texUnit->_Current, texObj);
complete = true;
break;
}
}
if (!complete)
continue;
/* if we get here, we know this texture unit is enabled */
BITSET_SET(enabled_texture_units, unit);
ctx->Texture._MaxEnabledTexImageUnit =
MAX2(ctx->Texture._MaxEnabledTexImageUnit, (int)unit);
ctx->Texture._EnabledCoordUnits |= 1 << unit;
update_tex_combine(ctx, texUnit);
}
}
/**
* \note This routine refers to derived texture matrix values to
* compute the ENABLE_TEXMAT flags, but is only called on
* _NEW_TEXTURE. On changes to _NEW_TEXTURE_MATRIX, the ENABLE_TEXMAT
* flags are updated by _mesa_update_texture_matrices, above.
*
* \param ctx GL context.
*/
static void
update_texture_state( GLcontext *ctx )
{
GLuint unit;
struct gl_fragment_program *fprog = NULL;
struct gl_vertex_program *vprog = NULL;
GLbitfield enabledFragUnits = 0x0;
if (ctx->Shader.CurrentProgram &&
ctx->Shader.CurrentProgram->LinkStatus) {
fprog = ctx->Shader.CurrentProgram->FragmentProgram;
vprog = ctx->Shader.CurrentProgram->VertexProgram;
}
else {
if (ctx->FragmentProgram._Enabled) {
fprog = ctx->FragmentProgram.Current;
}
if (ctx->VertexProgram._Enabled) {
/* XXX enable this if/when non-shader vertex programs get
* texture fetches:
vprog = ctx->VertexProgram.Current;
*/
}
}
/* TODO: only set this if there are actual changes */
ctx->NewState |= _NEW_TEXTURE;
ctx->Texture._EnabledUnits = 0x0;
ctx->Texture._GenFlags = 0x0;
ctx->Texture._TexMatEnabled = 0x0;
ctx->Texture._TexGenEnabled = 0x0;
/*
* Update texture unit state.
*/
for (unit = 0; unit < ctx->Const.MaxTextureImageUnits; unit++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
GLbitfield enabledVertTargets = 0x0;
GLbitfield enabledFragTargets = 0x0;
GLbitfield enabledTargets = 0x0;
GLuint texIndex;
/* Get the bitmask of texture target enables.
* enableBits will be a mask of the TEXTURE_*_BIT flags indicating
* which texture targets are enabled (fixed function) or referenced
* by a fragment shader/program. When multiple flags are set, we'll
* settle on the one with highest priority (see below).
*/
if (vprog) {
enabledVertTargets |= vprog->Base.TexturesUsed[unit];
}
if (fprog) {
enabledFragTargets |= fprog->Base.TexturesUsed[unit];
}
else {
/* fixed-function fragment program */
enabledFragTargets |= texUnit->Enabled;
}
enabledTargets = enabledVertTargets | enabledFragTargets;
texUnit->_ReallyEnabled = 0x0;
if (enabledTargets == 0x0) {
/* neither vertex nor fragment processing uses this unit */
continue;
}
/* Look for the highest priority texture target that's enabled (or used
* by the vert/frag shaders) and "complete". That's the one we'll use
* for texturing. If we're using vert/frag program we're guaranteed
* that bitcount(enabledBits) <= 1.
* Note that the TEXTURE_x_INDEX values are in high to low priority.
*/
for (texIndex = 0; texIndex < NUM_TEXTURE_TARGETS; texIndex++) {
if (enabledTargets & (1 << texIndex)) {
struct gl_texture_object *texObj = texUnit->CurrentTex[texIndex];
if (!texObj->_Complete) {
_mesa_test_texobj_completeness(ctx, texObj);
}
if (texObj->_Complete) {
texUnit->_ReallyEnabled = 1 << texIndex;
_mesa_reference_texobj(&texUnit->_Current, texObj);
break;
}
}
}
if (!texUnit->_ReallyEnabled) {
if (fprog) {
/* If we get here it means the shader is expecting a texture
* object, but there isn't one (or it's incomplete). Use the
* fallback texture.
*/
struct gl_texture_object *texObj = _mesa_get_fallback_texture(ctx);
texUnit->_ReallyEnabled = 1 << TEXTURE_2D_INDEX;
_mesa_reference_texobj(&texUnit->_Current, texObj);
}
else {
/* fixed-function: texture unit is really disabled */
continue;
}
}
/* if we get here, we know this texture unit is enabled */
ctx->Texture._EnabledUnits |= (1 << unit);
if (enabledFragTargets)
enabledFragUnits |= (1 << unit);
update_tex_combine(ctx, texUnit);
}
/* Determine which texture coordinate sets are actually needed */
if (fprog) {
const GLuint coordMask = (1 << MAX_TEXTURE_COORD_UNITS) - 1;
ctx->Texture._EnabledCoordUnits
= (fprog->Base.InputsRead >> FRAG_ATTRIB_TEX0) & coordMask;
}
else {
/**
* Bind a named texture to a texturing target.
*
* \param target texture target.
* \param texName texture name.
*
* \sa glBindTexture().
*
* Determines the old texture object bound and returns immediately if rebinding
* the same texture. Get the current texture which is either a default texture
* if name is null, a named texture from the hash, or a new texture if the
* given texture name is new. Increments its reference count, binds it, and
* calls dd_function_table::BindTexture. Decrements the old texture reference
* count and deletes it if it reaches zero.
*/
void GLAPIENTRY
_mesa_BindTexture( GLenum target, GLuint texName )
{
GET_CURRENT_CONTEXT(ctx);
struct gl_texture_unit *texUnit = _mesa_get_current_tex_unit(ctx);
struct gl_texture_object *newTexObj = NULL;
GLint targetIndex;
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (MESA_VERBOSE & (VERBOSE_API|VERBOSE_TEXTURE))
_mesa_debug(ctx, "glBindTexture %s %d\n",
_mesa_lookup_enum_by_nr(target), (GLint) texName);
targetIndex = target_enum_to_index(ctx, target);
if (targetIndex < 0) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindTexture(target)");
return;
}
assert(targetIndex < NUM_TEXTURE_TARGETS);
/*
* Get pointer to new texture object (newTexObj)
*/
if (texName == 0) {
/* Use a default texture object */
newTexObj = ctx->Shared->DefaultTex[targetIndex];
}
else {
/* non-default texture object */
newTexObj = _mesa_lookup_texture(ctx, texName);
if (newTexObj) {
/* error checking */
if (newTexObj->Target != 0 && newTexObj->Target != target) {
/* the named texture object's target doesn't match the given target */
_mesa_error( ctx, GL_INVALID_OPERATION,
"glBindTexture(target mismatch)" );
return;
}
if (newTexObj->Target == 0) {
finish_texture_init(ctx, target, newTexObj);
}
}
else {
if (ctx->API == API_OPENGL_CORE) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBindTexture");
return;
}
/* if this is a new texture id, allocate a texture object now */
newTexObj = ctx->Driver.NewTextureObject(ctx, texName, target);
if (!newTexObj) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glBindTexture");
return;
}
/* and insert it into hash table */
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
_mesa_HashInsert(ctx->Shared->TexObjects, texName, newTexObj);
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
}
newTexObj->Target = target;
}
assert(valid_texture_object(newTexObj));
/* Check if this texture is only used by this context and is already bound.
* If so, just return.
*/
{
GLboolean early_out;
_glthread_LOCK_MUTEX(ctx->Shared->Mutex);
early_out = ((ctx->Shared->RefCount == 1)
&& (newTexObj == texUnit->CurrentTex[targetIndex]));
_glthread_UNLOCK_MUTEX(ctx->Shared->Mutex);
if (early_out) {
return;
}
}
/* flush before changing binding */
FLUSH_VERTICES(ctx, _NEW_TEXTURE);
/* Do the actual binding. The refcount on the previously bound
* texture object will be decremented. It'll be deleted if the
* count hits zero.
*/
_mesa_reference_texobj(&texUnit->CurrentTex[targetIndex], newTexObj);
ASSERT(texUnit->CurrentTex[targetIndex]);
/* Pass BindTexture call to device driver */
if (ctx->Driver.BindTexture)
ctx->Driver.BindTexture(ctx, target, newTexObj);
}
/**
* Initialize texture state for the given context.
*/
GLboolean
_mesa_init_texture(struct gl_context *ctx)
{
GLuint u;
/* Texture group */
ctx->Texture.CurrentUnit = 0; /* multitexture */
/* Appendix F.2 of the OpenGL ES 3.0 spec says:
*
* "OpenGL ES 3.0 requires that all cube map filtering be
* seamless. OpenGL ES 2.0 specified that a single cube map face be
* selected and used for filtering."
*
* Unfortunatley, a call to _mesa_is_gles3 below will only work if
* the driver has already computed and set ctx->Version, however drivers
* seem to call _mesa_initialize_context (which calls this) early
* in the CreateContext hook and _mesa_compute_version much later (since
* it needs information about available extensions). So, we will
* enable seamless cubemaps by default since GLES2. This should work
* for most implementations and drivers that don't support seamless
* cubemaps for GLES2 can still disable it.
*/
ctx->Texture.CubeMapSeamless = ctx->API == API_OPENGLES2;
for (u = 0; u < ARRAY_SIZE(ctx->Texture.Unit); u++) {
struct gl_texture_unit *texUnit = &ctx->Texture.Unit[u];
GLuint tex;
/* initialize current texture object ptrs to the shared default objects */
for (tex = 0; tex < NUM_TEXTURE_TARGETS; tex++) {
_mesa_reference_texobj(&texUnit->CurrentTex[tex],
ctx->Shared->DefaultTex[tex]);
}
texUnit->_BoundTextures = 0;
}
for (u = 0; u < ARRAY_SIZE(ctx->Texture.FixedFuncUnit); u++) {
struct gl_fixedfunc_texture_unit *texUnit =
&ctx->Texture.FixedFuncUnit[u];
texUnit->EnvMode = GL_MODULATE;
ASSIGN_4V( texUnit->EnvColor, 0.0, 0.0, 0.0, 0.0 );
texUnit->Combine = default_combine_state;
texUnit->_EnvMode = default_combine_state;
texUnit->_CurrentCombine = & texUnit->_EnvMode;
texUnit->TexGenEnabled = 0x0;
texUnit->GenS.Mode = GL_EYE_LINEAR;
texUnit->GenT.Mode = GL_EYE_LINEAR;
texUnit->GenR.Mode = GL_EYE_LINEAR;
texUnit->GenQ.Mode = GL_EYE_LINEAR;
texUnit->GenS._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenT._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenR._ModeBit = TEXGEN_EYE_LINEAR;
texUnit->GenQ._ModeBit = TEXGEN_EYE_LINEAR;
/* Yes, these plane coefficients are correct! */
ASSIGN_4V( texUnit->GenS.ObjectPlane, 1.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenT.ObjectPlane, 0.0, 1.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenR.ObjectPlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenQ.ObjectPlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenS.EyePlane, 1.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenT.EyePlane, 0.0, 1.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenR.EyePlane, 0.0, 0.0, 0.0, 0.0 );
ASSIGN_4V( texUnit->GenQ.EyePlane, 0.0, 0.0, 0.0, 0.0 );
}
/* After we're done initializing the context's texture state the default
* texture objects' refcounts should be at least
* MAX_COMBINED_TEXTURE_IMAGE_UNITS + 1.
*/
assert(ctx->Shared->DefaultTex[TEXTURE_1D_INDEX]->RefCount
>= MAX_COMBINED_TEXTURE_IMAGE_UNITS + 1);
/* Allocate proxy textures */
if (!alloc_proxy_textures( ctx ))
return GL_FALSE;
/* GL_ARB_texture_buffer_object */
_mesa_reference_buffer_object(ctx, &ctx->Texture.BufferObject,
ctx->Shared->NullBufferObj);
ctx->Texture.NumCurrentTexUsed = 0;
return GL_TRUE;
}
